CN116154430A - Phase shifter, base station antenna and base station - Google Patents

Abstract

The present application provides a phase shifter, a base station antenna and a base station. The phase shifter includes a main body and a suspension strip line. The main body includes a storage cavity, and the suspension strip line is accommodated in the storage cavity. The suspension strip line includes a main feeder, a power splitter, an output feeder, and a filter structure; one end of the main feeder is an input The other end is connected to the power split junction, the other end of the power split junction is connected to the output feeder, the output feeder includes at least two output ends, each output end is far away from the power split junction, the main feeder includes a suspension section, and the filter structure includes a set The open circuit gap on the suspension section, the open circuit gap runs through the suspension section in the thickness direction of the suspension section, and divides the suspension section into a transmission belt and an open circuit belt arranged in parallel in the width direction of the suspension section, and the open circuit belt and the transmission belt The length direction of the belt is the same as that of the suspension section, wherein one end of the open-circuit belt is connected with the transmission belt, and the other end is suspended in the storage cavity. The application realizes miniaturized filtering, avoids the risk of passive intermodulation, and ensures communication quality.

Description

Phase shifters, base station antennas, and base stations

technical field

The present application relates to the technical field of communication, and in particular to a phase shifter, a base station antenna and a base station.

Background technique

The phase shifter is an important part of the base station antenna, which is used to adjust the direction of the elevation beam of the base station antenna to meet the needs of network coverage or network optimization. With the increasing number of multi-frequency antennas, in the design of base station antennas, it is usually necessary to use cables outside the phase shifter through screws or welding to achieve filtering, so as to ensure that each frequency band does not interfere with each other, thereby increasing Inter-frequency isolation. However, this design will not only introduce Passive Intermodulation (PIM) risks due to screws or solder joints, affecting communication quality, but also increase additional insertion loss due to the introduction of external filters, reducing the radiation efficiency of base station antennas .

Contents of the invention

The present application provides a phase shifter, a base station antenna and a base station, which realize miniaturized filtering, avoid the risk of passive intermodulation, and ensure communication quality.

The first aspect of the embodiment of the present application provides a phase shifter. The phase shifter includes a main body and a suspension strip line. The main body includes a storage cavity, and the suspension strip line is accommodated in the storage cavity. Junction, output feeder and filter structure;

One end of the main feeder is the input end, the other end is connected to the power split junction, the other end of the power split junction is connected to the output feeder, the output feeder includes at least two output ends, each output end is far away from the power split junction, and the main feeder includes a suspension section, the filtering structure includes an open circuit slit arranged on the suspension section, the open circuit slit runs through the suspension section in the thickness direction of the suspension section, and divides the suspension section into a parallel transmission belt and an open circuit in the width direction of the suspension section The length direction of the belt, the open circuit belt and the transmission belt is the same as that of the suspension section, wherein one end of the open circuit belt is connected to the transmission belt, and the other end is suspended in the storage cavity.

The phase shifter of the present application integrates a filtering function by setting an open-circuit gap in the suspension section of the main feeder, and realizes filtering in a specific frequency band (that is, removing interference signals). The design of the open circuit gap has a simple structure, which not only greatly reduces the filtering cost of the phase shifter, but also does not increase the size of the main feeder, and the space utilization rate is high, which is conducive to the layout of the main feeder in the storage cavity (that is, the main body) , which is beneficial to the miniaturization of the main body, and further to the miniaturization of the phase shifter. Therefore, the phase shifter of the present application can be applied to the same small, micro or smaller base station antenna as the existing phase shifter not integrated with the filter function, which is convenient for integration. In addition, when the phase shifter is integrated into the base station antenna, it can effectively improve the inter-frequency isolation of the base station antenna and improve the communication quality of the base station antenna; compared with the prior art, the design of the open circuit gap not only effectively avoids the The passive intermodulation risk introduced by the increase of solder joints improves the communication quality; moreover, it avoids the additional insertion loss caused by the external filter and improves the radiation efficiency of the base station antenna.

In one embodiment, the path length of the open slot is between one-eighth and one-fourth of the filtering wavelength. The filter wavelength refers to the wavelength of a signal (ie, an interference signal) that is filtered out by the open slot. By adjusting the path length of the open slit, the user can adjust the wavelength range of the signal filtered by the open slit, which is convenient for the user to filter out unnecessary signals. The adjustment is simple and the adjustment cost is low, and the processing cost of the phase shifter is reduced. In this embodiment, the path length of the open slot is one-sixth of the filtering wavelength.

In one embodiment, the open gap includes a first section and a second section, the first section extends along the length direction of the suspension section, the second section communicates with an end of the first section away from the input end, and the second section extends along the suspension section The width direction extends and runs through the side of the suspension section to communicate with the accommodation cavity. At this time, the path length of the open slot refers to the sum of the lengths of the first segment and the second segment. Therefore, the user can adjust the wavelength range of the signal filtered out by the open gap by adjusting the length of the first segment and/or the second segment, and the adjustment is simple; and since the first segment and the second segment are strip-shaped slots, the structure is simple , easy to process and reduce processing cost. It can be understood that when the length of the second segment is smaller than that of the first segment, the length of the second segment 2612 can be ignored. At this time, the user can quickly confirm the wavelength range of the first segment according to the wavelength range of the signal to be filtered out. The length reduces the adjustment difficulty and processing cost.

In one embodiment, the open gap includes a first section, a second section, a third section and a fourth section connected end to end in sequence, the first section and the third section extend along the width direction of the suspension section, the second section and the first section The four sections extend along the length direction of the suspension section; wherein, the end of the first section away from the second section runs through the suspension section along the width direction of the suspension section. The user can adjust the wavelength range of the signal filtered out by the open gap by adjusting the length of the first section, the second section, the third section, and the fourth section.

In one embodiment, there are multiple open slots, the multiple open slots are arranged on the main feeder at intervals, and the path lengths of the multiple open slots are different. Since the path lengths of the multiple open slots are different, the multiple open slots can respectively filter out signals in different wavelength ranges. This effectively increases the operating bandwidth of the phase shifter.

In one embodiment, the filter structure includes a fixing frame, the main feeder is fixed and suspended in the storage cavity, the fixing frame is housed in the storage cavity, the fixing frame is detachably connected to the suspension section, and the fixing frame is used to limit the distance between the transmission belt and the Lead the way. The width of the open circuit gap can be limited by limiting the transmission belt and the open circuit belt by the fixing frame. In this way, the situation that the width of the open slot changes is effectively avoided, and the parasitic capacitance can be stably and reliably loaded on the open slot, thereby ensuring that the open slot can stably filter out signals.

In one embodiment, the fixing frame includes a limiting body, the limiting body is located in the open-circuit gap, and the limiting body abuts against the side of the transmission belt and the open-circuit belt facing the open-circuit gap. The limit body resists the transmission belt and the open circuit belt to ensure that the width of the open circuit gap does not change and ensure that the open circuit gap can filter out signals stably.

In one embodiment, the fixing frame includes a frame body, and the limit body is protruded on the surface of the frame body facing the suspension section, and the opposite ends of the frame body in the thickness direction of the suspension section are respectively connected to the cavity wall of the storage cavity. Press against, and the opposite ends of the suspension section in the width direction are respectively pressed against the cavity wall of the receiving cavity. In this way, the frame body is limited in the thickness direction and width direction of the suspension section, and then the suspension section fixedly connected with the frame body is further limited in the thickness direction and width direction of the suspension section. The suspension section plays a role of further support, further avoiding the contact between the suspension section and the cavity wall of the storage cavity, further ensuring that the suspension section can be stably suspended in the storage cavity, and improving the stability of the internal structure of the phase shifter.

In one embodiment, the fixing frame includes a plurality of buckles, and the transmission belt and the open-circuit belt are respectively provided with a plurality of slots on both sides in the width direction of the suspension section, and the plurality of buckles correspond to the plurality of slots one by one. Card access. Through the connection between the buckle and the card slot, the transmission belt and the open circuit belt can be stably and firmly connected with the fixed frame, and the relative deflection or shaking of the transmission belt and the open circuit belt can be avoided through the fixed frame, so as to ensure that the width of the open circuit gap does not change , to ensure that the open gap can filter out the signal stably. Moreover, the buckle and the slot have a simple and stable design structure, are easy to process, and have low processing cost.

In this embodiment, the side of the transmission belt and the open circuit belt facing away from the exit gap are respectively provided with a plurality of first clamping slots, and the side facing the open circuit gap is respectively provided with a plurality of second clamping slots, and a plurality of buckles It includes a plurality of first buckles and a plurality of second buckles, and each first buckle is inserted into the gap between the cavity wall of the storage chamber and the transmission belt or the open-circuit belt along the thickness direction of the suspension section to connect with the first buckle Corresponding locking; each second buckle is inserted into the open gap along the thickness direction of the suspension section and correspondingly locked with the second locking groove. Through the cooperative connection between the first buckle and the first card slot and the second buckle and the second card slot, both the transmission belt and the open-circuit belt are fixedly connected to the fixing frame, so that the transmission belt and the open-circuit belt are relatively fixed through the fixing frame, and the structure Stable and simple, low processing cost. The relative deflection or shaking of the transmission belt and the open-circuit belt can be avoided through the fixing frame, and the width of the open-circuit gap does not change. Moreover, the second buckle inserted into the open-circuit gap further ensures the width of the open-circuit gap and ensures that the open-circuit gap can be stable. , Reliably load the parasitic capacitance, and then ensure that the open gap can filter out the signal stably.

In one embodiment, the fixing frame includes a frame body, and the suspension section is provided with a limit hole penetrating through the suspension section. Lifting or fixing buckle, the protrusion or fixing buckle is clamped in the limit hole. Through the cooperation of the fixing buckle and the raised point with the limit hole, the frame body can be stably and firmly fixedly connected with the suspension section, thereby preventing the frame body from shaking or even moving relative to the suspension section. Moreover, the design of the fixing buckle and the protruding point has a simple structure, low processing cost, and is convenient for assembly and disassembly.

In one embodiment, the main feeder further includes a first connecting section and a second connecting section, one end of the first connecting section is electrically connected to the transmission of the suspension section, the other end is connected to the second connecting section, and the other end of the second connecting section It is connected with the power split junction, one end of the open circuit belt is connected with the transmission belt, and the other end of the open circuit belt is spaced from the transmission belt through the open circuit gap.

In this embodiment, the suspension section includes a first part, a second part and a third part, the opposite ends of the second part in the length direction of the suspension section are respectively connected to the first part and the third part, and the third part is away from The end of the second part is connected to the first connecting section, the end of the first part away from the second part is the input end, the open circuit gap is set on the second part and the second part is divided into a transmission belt and an open circuit belt, and the transmission belt They are respectively connected to the first part and the third part, the end of the open-circuit belt close to the input end is connected to the transmission belt, and the other end is spaced from the transmission belt. In other embodiments, the end of the open-circuit belt away from the input end is also connected to the transmission belt.

In other embodiments, the open-circuit gap can also divide the entire suspension section into a transmission belt and an open-circuit belt in the width direction of the suspension section, one end of the transmission belt is connected to the first connection section, and the transmission belt is far away from the The ends are input ends, one end of the open-circuit belt is connected to the transmission belt, and the other end is spaced from the transmission belt.

In one embodiment, a connection hole is provided at the end of the second connecting section close to the power distribution junction, and the power distribution junction is protruded with a plug-in end, and the plug-in end is plugged into the connection hole so that the main feeder is connected to the power distribution junction. The structure is stable and simple, the processing cost is low, and it is easy to disassemble and assemble, which ensures the stability of the internal structure of the phase shifter.

In one embodiment, the storage cavity includes a main cavity and a secondary cavity, both of which extend along the length direction of the suspension section, and the secondary cavity is located on one side of the main cavity and communicates with the main cavity along the thickness direction of the suspension section , the input end is located in the side of the main chamber away from the auxiliary chamber, the main feeder extends from the main chamber to the auxiliary chamber, the power splitter and the output feeder are located in the auxiliary chamber; the suspension section is located in the main chamber. The design of the main chamber and the auxiliary chamber is beneficial to reduce the length of the main body, improve the space utilization rate, and further facilitate the miniaturization development of the phase shifter.

In one embodiment, the phase shifter further includes a phase shifting unit, which is located in the receiving cavity, and the phase shifting unit moves relative to the output feeder to adjust the phase between the output end and the power splitter. By controlling the movement of the phase shifting unit, the phase between the output terminal and the power splitter can be continuously adjusted, which is convenient for users to adjust.

In one embodiment, the phase shifting unit is a dielectric body, the phase shifting unit covers the output feeder, and the phase shifting unit moves relative to the output feeder to adjust the area of the output feeder covered by the phase shifting unit. By adjusting the area of the output feeder covered by the phase shifting unit, the equivalent dielectric constant of the output feeder is changed, thereby changing the phase between the output end and the power splitter.

In this embodiment, the number of phase-shifting units is one, and the output feeder includes a first output section and a second output section, one end of the first output section and the second output section are connected to the power splitter, and the other ends are output end, the first output section and the second output section are arranged along the length direction of the suspension section, and the phase shifting unit covers the first output section, the second output section and the power splitter. The movement of the phase shifting unit along the length of the suspension section can simultaneously and continuously change the area covered by the phase shifting unit of the first output section and the second output section, thereby simultaneously and continuously adjusting the equivalent of the first output section and the second output section. The dielectric constant, so that the phase of the power split junction to the two output terminals can be changed continuously at the same time, and then the phase of the two output terminals to the power split junction can be changed at the same time.

In other embodiments, the number of phase-shifting units may also correspond to the number of output terminals, and each phase-shifting unit is respectively arranged on one or both sides of the output section between an output terminal and the power division junction and covers the output section, Each phase shifting unit moves relative to the output feeder to adjust the area of the corresponding output section covered by the phase shifting unit, thereby changing the phases from different output terminals to the power splitting junction.

The second aspect of the embodiment of the present application provides a base station antenna, including: the phase shifter according to any one of the first aspect of the present application and the antenna, and the output terminal is electrically connected to the antenna.

In this embodiment, the antenna includes an antenna panel and a plurality of radiating units; where frequencies of the radiating units may be the same or different. The radiation unit is used to convert radio frequency signals into electromagnetic wave signals and radiate them; or receive electromagnetic wave signals and convert them into radio frequency signals. The antenna realizes its function of radiating or receiving electromagnetic wave signals through the radiation unit. Multiple radiation units are arranged on the antenna panel, and the antenna panel is used to enhance the directivity of the antenna. The output end of the phase shifter is electrically connected to the radiation unit, and the phase shifter makes the output signal form a continuous linear phase difference by moving its internal phase shifter unit, and transmits the signal to each radiation unit, thereby changing the radiation of each radiation unit. Phase, to achieve its purpose of adjusting the electrical downtilt angle of the base station antenna.

The third aspect of the embodiment of the present application provides a base station, which is characterized in that it includes the base station antenna and the base station server according to the second aspect of the present application, and the base station server is electrically connected to the base station antenna. The base station server is used to output or receive radio frequency signals. The base station server is electrically connected to the input end.

The phase shifter of the present application has a phase shifting function and a filtering function. When the phase shifter receives the signal transmitted from the base station server, the phase shifter first filters the signal in a specific frequency band through the open gap (that is, removes the interference wave), and then The signal is phase-shifted, and then the signal is sent to each radiation unit of the antenna to adjust the electrical downtilt angle of the electromagnetic beam of the base station antenna, which effectively reduces the interference of unnecessary signals to the radiation unit, thereby ensuring that the base station antenna The various frequency bands are free from interference, which improves the inter-frequency isolation and improves the communication quality of the base station antenna. Compared with the scheme of adding an external filter to the phase shifter to improve the inter-frequency isolation, the phase shifter integrating the filtering function and the phase shifting function not only reduces the number of screws or solder joints, reduces the risk of passive intermodulation, and improves The communication quality of the base station antenna is improved, and the additional insertion loss caused by the external filter is avoided, and the radiation efficiency of the base station antenna is effectively improved. In addition, compared with the original phase shifter with only the phase shifting function, the phase shifter of the present application integrates the phase shifting function and the filtering function, and its overall size and internal space volume do not increase. Therefore, with the development of miniaturization of base station antennas, the phase shifter of the present application can always integrate a filtering function on the basis of ensuring its phase shifting function, which is beneficial to the miniaturization of base station antennas.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiment of the present application or the background art, the following will describe the drawings that need to be used in the embodiment of the present application or the background art.

FIG. 1 is a schematic structural diagram of a base station provided in an embodiment of the present application;

Fig. 2 is a structural block diagram of a base station antenna of the base station shown in Fig. 1;

Fig. 3 is a schematic side view of the phase shifter of the base station antenna shown in Fig. 2;

Fig. 4 is a side structural schematic view omitting the phase shifting unit in the phase shifter shown in Fig. 3;

Fig. 5 is another angle structural view of the main feeder part (omit the support device) in the phase shifter shown in Fig. 4;

Fig. 6 is the enlarged view of the VIII part (fixed mount omitted) of the main feeder part in the phase shifter shown in Fig. 5;

Fig. 7 is the enlarged view of the VIII part of the main feeder part in the phase shifter shown in Fig. 5;

Fig. 8 is an enlarged view of another embodiment of the VIII part (fixed mount omitted) of the main feeder part in the phase shifter shown in Fig. 5;

Fig. 9 is a structural schematic diagram of another embodiment of the main feeder part in the phase shifter shown in Fig. 5;

FIG. 10 is an enlarged view of part X in the phase shifter shown in FIG. 4 .

Detailed ways

The phase shifter in the embodiment of the present application is applied to a base station antenna, and the base station antenna is applied to a base station. A base station is a device deployed on a wireless access network to provide wireless communication functions. In this application, component A is connected to component B means that component A is not only electrically connected to component B, but also physically connected to component B.

Embodiments of the present application are described below with reference to the drawings in the embodiments of the present application.

Referring to FIG. 1 , in this embodiment, a base station 1000 includes a base station server 400 and an antenna feeder system. The base station server 400 is located indoors, which is beneficial to protect the base station server 400 and improve the working life of the base station server 400 . The base station server 400 is used to output or receive radio frequency signals. The base station server 400 is electrically connected to the antenna feeder system. The antenna feeder system is used to radiate the radio frequency signal output by the base station server 400 in the form of electromagnetic waves; or receive an external electromagnetic wave signal, convert it into a radio frequency signal, and transmit it to the base station server 400 .

In this embodiment, the antenna feeder system includes a base station antenna 200, a pole 302, an adjustment bracket 303, and a cable 304, and also includes at least one grounding device 305, a lightning protector 306, and a seal. The base station antenna 200 is a planar multi-frequency antenna. It can be understood that the base station antenna 200 may also be various antenna elements such as a wire antenna, a planar antenna, or a beautification antenna. The number of base station antennas 200 is one, or the number of base station antennas 200 may be more than one. The base station antenna 200 is used for radiating or receiving electromagnetic wave signals. Specifically, the base station antenna 200 converts the radio frequency signal into an electromagnetic wave signal and radiates it in the form of an electromagnetic wave beam; or, receives the electromagnetic wave signal and converts it into a radio frequency signal. The base station antenna 200 is located outdoors, avoiding interference from walls, roofs, etc., and improving the ability of the base station antenna 200 to radiate or receive electromagnetic wave signals.

The pole 302 is fixed on the bearing surface such as the ground or the floor. The adjustment bracket 303 is detachably mounted on the pole 302 . The base station antenna 200 is fixed on the adjustment bracket 303 , and then fixed on the pole 302 through the adjustment bracket 303 . The adjustment bracket 303 is also used to adjust the mechanical downtilt of the base station antenna 200 so as to adjust the direction of the electromagnetic beam of the base station antenna 200 , thereby adjusting the coverage of the electromagnetic wave signal of the base station antenna 200 . The cable 304 is used to implement signal transmission between the base station antenna 200 and the base station server 400 .

In this embodiment, the adjustment bracket 303 includes a first bracket 3031 and a second bracket 3032, the first bracket 3031 and the second bracket 3032 can be detachably mounted on the pole 302, the first bracket 3031 and the second bracket 3032 share Supporting the base station antenna 200, the second support 3032 is farther away from the bearing surface such as the ground and the floor than the first support 3031. By adjusting the second support 3032, the end of the base station antenna 200 connected to the second support 3032 can be controlled to approach or move away from the holding surface. Rod 302, and then adjust the mechanical downtilt angle of the base station antenna 200. "First" and "second" are for convenience of description only, and should not be regarded as limitations on the present application. The mechanical downtilt angle refers to an included angle at which the base station antenna 200 is tilted relative to the vertical direction, and the opening faces downward.

One end of the cable 304 is connected to the base station antenna 200 , and the other end of the cable 304 passes through the wall 307 to connect to the base station server 400 located indoors. The base station server 400 is electrically connected to the base station antenna 200 through the cable 304 . Thus, the radio frequency signal output by the base station server 400 is transmitted to the base station antenna 200 through the cable 304, converted into an electromagnetic wave signal by the base station antenna 200 and radiated out; or, the base station antenna 200 receives an external electromagnetic wave signal, converts it into a radio frequency signal, and transmits it through the cable 304 to the base station server 400. The grounding device 305 is disposed on the cable 304 to realize the grounding of the cable 304 . The lightning protector 306 is installed on the cable 304 and between the wall 307 and the base station server 400 . The lightning protector 306 is used for lightning protection and leakage, preventing lightning from invading along the cable 304 and damaging the base station server 400 . The sealing member may be arranged between the base station antenna 200 and the cable 304 to ensure the sealing of the connection between the base station antenna 200 and the cable 304 .

Please refer to FIG. 1 and FIG. 2 together. In this embodiment, the base station antenna 200 includes at least one antenna 201 , a feeding network 202 , a radome 203 and an antenna connector 204 . The antenna 201 is used to radiate or receive electromagnetic wave signals, and the base station antenna 200 radiates or receives electromagnetic wave signals through the antenna 201 . The feeding network 202 is electrically connected to the antenna 201 and the antenna connector 204 respectively. The antenna connector 204 is electrically connected to the base station server 400 through a cable 304 . The antenna 201 and the feeding network 202 are accommodated in the radome 203 , and the antenna connector 204 is located outside the radome 203 . The antenna 201 realizes the signal transmission with the base station server 400 through the feeding network 202 , the antenna connector 204 and the cable 304 . The feed network 202 is used to feed the radio frequency signal received and converted by the antenna 201 to the antenna joint 204 according to a certain amplitude or phase, and then to the base station server 400; The radio frequency signal is fed to the antenna 201 according to a certain amplitude or phase, and then the electromagnetic wave signal is radiated outward. In one embodiment, the feeding network 202 may be formed by controlled impedance transmission lines.

In this embodiment, the radome 203 is used to protect the antenna 201 and the feeding network 202 to improve the service life of the base station antenna 200 . It can be understood that the radome 203 should have good electromagnetic wave penetration characteristics in terms of electrical performance, so as to avoid affecting the radiation or reception of electromagnetic wave signals by the antenna 201; the radome 203 should have stable and reliable characteristics in terms of mechanical properties, so that the radome 203 can withstand The impact of the harsh external environment.

In this embodiment, as shown in FIG. 2 , each antenna 201 includes an antenna panel 2011 and a plurality of radiating units 2012 ; wherein the frequencies of the radiating units 2012 may be the same or different. The radiation unit 2012 is used to convert radio frequency signals into electromagnetic wave signals and radiate them; or receive electromagnetic wave signals and convert them into radio frequency signals. The antenna 201 realizes its function of radiating or receiving electromagnetic wave signals through the radiation unit 2012 . A plurality of radiation units 2012 are disposed on the antenna panel 2011 , and the antenna panel 2011 is used to enhance the directivity of the antenna 201 . Exemplarily, the antenna 201 is disposed on one side of the antenna panel 2011 . For ease of description, the surface of the antenna panel 2011 on which the antenna 201 is disposed is called the front surface. The antenna panel 2011 can reflect and gather the electromagnetic wave signal coming from the front to the receiving point, improve the receiving sensitivity of the electromagnetic wave signal, and enhance the ability of the antenna 201 to receive the electromagnetic wave signal; moreover, the antenna panel 2011 can also concentrate the electromagnetic wave signal toward the same direction as the front. Radiation in the direction of the antenna panel 2011 enhances the ability of the antenna 201 to radiate electromagnetic wave signals; in addition, the antenna panel 2011 can also block and shield other irrelevant radiation coming from the back of the antenna panel 2011 (the back of the antenna panel 2011 refers to the surface of the antenna panel 2011 away from the front). The interference effect of the radio wave on the radiated or received electromagnetic wave signal by the antenna 201 improves the quality of the electromagnetic wave signal radiated or received by the antenna 201 .

In this embodiment, as shown in FIG. 2 , the feed network 202 includes a phase shifter 100 , a transmission component 2022 , a calibration network 2023 and a power adapter 2024 . The phase shifter 100 is electrically connected to a plurality of radiation units 2012 of the antenna 201, and the phase shifter 100 is used to change the phase distribution of each radiation unit 2012 of the antenna 201, thereby adjusting the electrical downtilt angle of the electromagnetic beam of the base station antenna 200, thereby adjusting The direction of the electromagnetic beam of the base station antenna 200 . Specifically, the phase shifter 100 is an analog phase shifter, and the phase shifter 100 makes the output signal form a continuous linear phase difference by moving its internal phase shifting unit, and transmits the signal to each radiation unit 2012, thereby The phase of each radiation unit 2012 is changed to achieve its purpose of adjusting the electrical downtilt. The transmission part 2022 is electrically connected to the phase shifting unit of the phase shifter 100, and the transmission part 2022 is used to drive the phase shifting unit to move so that the signal output by the phase shifter 100 forms a phase difference, so that the phase shifter 100 can adjust the phase shifter of the base station antenna 200. The electrical downtilt of the electromagnetic beam. The calibration network 2023 is electrically connected to the phase shifter 100, and the calibration network 2023 is used to output a calibration signal and feed it to the phase shifter 100, so as to perform amplitude calibration and phase calibration on the electromagnetic beamforming of the antenna 201, so that the antenna 201 can form a pointing accuracy electromagnetic beams. In one embodiment, the calibration network 2023 can be omitted.

The power adapter 2024 is electrically connected to the phase shifter 100 and the antenna connector 204 respectively, and the power adapter 2024 is used to divide the energy of one input signal into multiple outputs; or to synthesize multiple input signals into one output. Specifically, the power adapter 2024 combines the signals transmitted from the antenna connector 204 into one output to the phase shifter 100, and outputs to the antenna 201 after being processed by the phase shifter 100; The radio frequency signals converted by 201 are divided into multiple channels and sent to the antenna connector 204 . The existence of the power adapter 2024 reduces the wiring complexity of the feed network 202 and reduces the cost. It can be understood that the power adapter 2024 can be omitted, that is, the phase shifter 100 is directly electrically connected to the antenna connector 204 .

In other embodiments, the phase shifter 100 may also be a digital phase shifter. The digital phase shifter is provided with a control circuit inside, and the uniformly stepped phase is selected by switching the switch in the control circuit, thereby correspondingly changing the phase of each radiation unit 2012 of the antenna 201, and then changing the electrical downtilt angle of the electromagnetic beam of the base station antenna 200 . At this time, the feeding network 202 omits the transmission component 2022 .

The phase shifter 100 is introduced below with a specific embodiment.

Please refer to FIG. 2 and FIG. 3 together. The phase shifter 100 includes a main body 10 , a suspension strip 20 , a phase shifting unit 30 and at least one supporting device 40 . The suspension strip 20 , the phase shifting unit 30 and the supporting device 40 are accommodated in the main body 10 . The supporting device 40 supports the suspension wire 20 , and the phase shifting unit 30 slides relative to the suspension wire 20 . The phase shifting unit 30 is electrically connected to the transmission part 2022 of the feeding network 202 . The incoming signal from the base station server 400 (as shown in FIG. 1 ) enters the feeding network 202 through the antenna connector 204, is transmitted to the suspension strip line 20 through the power adapter 2024, and then is output to the radiation unit of the antenna 201 through the suspension strip line 20 2012. For the convenience of description below, the signal transmitted from the base station server 400 to the suspended stripline 20 is called an input signal; the signal output to the radiation unit 2012 through the suspended stripline 20 is called an output signal. In this embodiment, the phase of the output signal can be changed by driving the phase shifting unit 30 to move relative to the suspension strip line 20 through the transmission part 2022, and then the phase of the radiation unit 2012 can be changed, so as to realize the purpose of the phase shifter 100 to adjust the electrical downtilt angle .

In this embodiment, the main body 10 has a receiving cavity 11 . The cavity wall of the main body 10 serves as the ground of the phase shifter 100 , and the electronic components of the phase shifter 100 accommodated in the cavity 11 are grounded through the main body 10 . The suspension strip 20 , the phase shifting unit 30 and the supporting device 40 are accommodated in the accommodation cavity 11 . The support device 40 is fixed in the storage cavity 11, the suspension belt line 20 is fixed on the support device 40, the suspension belt line 20 is fixed and suspended in the storage cavity 11 through the support device 40, and the suspension belt line 20 is suspended on the The accommodating cavity 11 means that there is a gap between the suspending belt line 20 and the cavity wall of the accommodating cavity 11 , that is, the suspending belt line 20 is not in contact with the cavity wall of the accommodating cavity 11 . This realizes the stable positioning of the suspension strip line 20 in the storage cavity 11, which not only ensures the performance of the suspension strip line 20, but also ensures the performance of the phase shifter 100, and avoids the interference between the suspension strip line 20 and the storage cavity 11. The cavity wall is scratched and damaged. In this embodiment, the supporting device 40 is a buckle protruding from the wall of the storage cavity 11, and the number of the supporting device 40 is four, and the suspension belt line 20 is fixed to the storage cavity by being clamped by the four buckles. 11 and not in contact with the housing chamber 11. In other embodiments, the support device 40 may also be a support frame fixed in the receiving chamber 11 , or may be other fixing structures provided in the receiving chamber 11 . The present application does not specifically limit the shape and structure of the supporting device 40 . The present application does not specifically limit the shape of the main body 10 , which may be in various shapes such as cuboid, block, and sphere. The main body 10 can be made by die-casting or crimping, which is not specifically limited in this application.

In this embodiment, as shown in FIG. 3 , the housing chamber 11 includes a main chamber 111 and an auxiliary chamber 112 communicating with the main chamber 111. Both the main chamber 111 and the auxiliary chamber 112 extend along the first direction X, and the auxiliary chamber 112 is located One side of the cavity 111 communicates with the main cavity 111 along the second direction Y, and the first direction X is perpendicular to the second direction Y. This is beneficial to reduce the length of the main body 10 and improve space utilization. It can be understood that the storage cavity 11 may only include the main cavity 111 or the secondary cavity 112 , and it may also include more cavities, for example, the storage cavity 11 may include three cavities, four cavities, or five cavities. For the convenience of the following description, the direction perpendicular to the first direction X and the second direction Y is defined as the third direction Z (as shown in FIG. 5 ).

Please refer to FIG. 2 , FIG. 4 and FIG. 5 together. The suspended stripline 20 is used for signal transmission to divide one input signal into multiple output signals, wherein the energies of the output signals can be the same or different. In this embodiment, the suspension strip line 20 is electrically connected to the power adapter 2024 and the radiation unit 2012 of the antenna 201 respectively. The suspension belt line 20 is specifically a sheet metal transmission belt line, and its material may be various conductive metals such as copper and aluminum or other conductive materials, which is not specifically limited in this application. In this embodiment, the suspended stripline 20 includes a main feeder 22 , a power splitter 23 and an output feeder 24 . The main feeder 22 includes an input end 221 and the output feeder 24 includes at least two output ends 241 . The main feeder 22 is connected to the output feeder 24 through a power splitter 23 . In this embodiment, the power splitter 23 and the output feeder 24 are integrally formed. The end of the main feeder 22 away from the input end 221 is connected to the power split junction 23, and each output end 241 is far away from the power split junction 23, that is, each output end 241 is only electrically connected to the power split junction 23. It can be understood that the input end 221 and at least two output terminals 241 are located on opposite sides of the suspended strip line 20 .

The input end 221 is located on the side of the main chamber 111 away from the auxiliary chamber 112 , the main feeder 22 extends from the main chamber 111 to the auxiliary chamber 112 , and the other end of the main feeder 22 away from the input end 221 is connected to the power splitting junction 23 . The power splitting junction 23 , the output feeder 24 and at least two output ends 241 are located in the auxiliary chamber 112 . The input terminal 221 is used to electrically connect with the power adapter 2024 to receive an input signal. The output end 241 is used to electrically connect with the radiation unit 2012 to output an output signal to the radiation unit 2012 , that is, the output end 241 is electrically connected to the antenna 201 .

In one embodiment, the output terminal 241 can also be connected with a power divider (a device used to divide the energy of one input signal into two or multiple outputs with equal or unequal energy), and each output terminal 241 can be divided by a power divider. The device is electrically connected to multiple radiating units 2012, so that one output signal output from each output terminal 241 can be divided into multiple channels and output to multiple radiating units 2012 through a power divider, which reduces the wiring complexity of the suspended strip line 20, The manufacturing cost of the phase shifter 100 is reduced.

The input signal fed to the suspension strip line 20 from the power adapter 2024 is fed to the main feeder 22 by the input end 221, fed to the power splitter 23 through the main feeder 22, and then fed to different power splitters along the output feeder 24 through the power splitter 23. The output terminal 241 outputs multiple output signals from the multiple output terminals 241 , and then feeds to the multiple radiation units 2012 . In this embodiment, the suspension strip line 20 includes a main feeder 22, a power splitter 23 and an output feeder 24, the output feeder 24 includes two output ends 241, and the power splitter 23 is located between the two output ends 241 , the description below is based on this. In other implementations, the suspended stripline 20 may also include more output terminals 241 . For example, the suspension stripline 20 may further include three output terminals 241 , and the three output terminals 241 are all away from the power dividing junction 23 .

Please refer to FIG. 4 and FIG. 5 together. In this embodiment, the main feeder 22 includes a suspension section 222 , a first connection section 223 and a second connection section 224 . The suspending section 222 , the first connecting section 223 and the second connecting section 224 are all in the shape of a straight belt. The suspension section 222 extends along the first direction X, and the first connection section 223 extends along the second direction Y. One end of the first connection section 223 is connected to the suspension section 222 , and the other end thereof is connected to the second connection section 224 . The second connecting section 224 extends along the first direction X, and the second connecting section 224 is used for connecting with the work splitting junction 23 . The end of the suspension section 222 away from the first connecting section 223 is the input end 221 . In this embodiment, the suspension section 222 is located in the main chamber 111, the first connecting section 223 is located in the main chamber 111 and the auxiliary chamber 112, and the second connecting section 224 is located in the auxiliary chamber 112; There is a gap in the cavity wall of the cavity 111 , that is, the suspension section 222 does not contact the cavity wall of the main cavity 111 . In this embodiment, the first direction X refers to the length direction of the suspension segment 222, the second direction Y refers to the thickness direction of the suspension segment 222, and the third direction Z refers to the width direction of the suspension segment 222 .

Please refer to FIG. 3 to FIG. 6 together. In this embodiment, the phase shifter 100 is provided with a filter structure 26 at the suspension section 222 of the main feeder 22, and the filter structure 26 includes an open circuit gap arranged on the suspension section 222. 261. The open slot 261 is used to load the parasitic capacitance to filter out the specific signal transmitted in the main feeder 22. The specific signal refers to the interference signal outside the operating frequency range of the phase shifter 100. The phase shifter 100 realizes specific frequency band filtering through the open slot 261. For ease of description, the signal that is filtered out is defined as a filtered signal.

In this embodiment, as shown in FIG. 4, FIG. 5 and FIG. Part of the suspension section 222 is divided into a transmission belt 2221 and an open circuit belt 2222 in the direction (ie, the third direction Z), and the length direction of the transmission belt 2221 and the open circuit belt 2222 is the same as the length direction of the suspension section 222 (ie, the first direction X ) are the same; the open circuit belt 2222 is located on one side of the transmission belt 2221 and separated by the open circuit gap 261. One end of the open-circuit belt 2222 is connected to the transmission belt 2221, and the other end of the open-circuit belt 2222 is suspended in the main cavity 111 (i.e., the storage cavity 11), that is, it is spaced from the transmission belt 2221 and the wall of the main cavity 111 to form an open circuit. state.

Specifically, the suspension segment 222 includes a first part 2223, a second part 2224 and a third part 2225, and the opposite ends of the second part 2224 in the length direction of the suspension segment 222 are respectively connected to the first part 2223 and the third part 2225. , the end of the third part 2225 far away from the second part 2224 is connected to the first connecting section 223, the end of the first part 2223 far away from the second part 2224 is the input end 221, and the open slot 261 is provided on the second part 2224 The second part 2224 is divided into the transmission belt 2221 and the open circuit belt 2222, the transmission belt 2221 is connected with the first part 2223 and the third part 2225 respectively, and the end of the open circuit belt 2222 near the input end 221 is connected with the transmission belt 2221 , the other end is spaced from the conveyor belt 2221. In other embodiments, the end of the open-circuit belt 2222 away from the input end 221 may also be connected to the transmission belt 2221 .

In other embodiments, the open-circuit gap 261 can also divide the entire suspension section 222 into a transmission belt 2221 and an open-circuit belt 2222 in the width direction of the suspension section 222, and one end of the transmission belt 2221 is connected to the first connecting section 223. The end of the belt 2221 away from the first connecting section 223 is the input end 221 , one end of the open circuit belt 2222 is connected to the transmission belt 2221 , and the other end is spaced from the transmission belt 2221 .

The gap between the open strip 2222 and the transmission strip 2221 forms a parasitic capacitance, that is, the open gap 261 loads the parasitic capacitance. When the input signal flows from the input terminal 221 through the part of the suspension section 222 provided with the open gap 261, under the action of the parasitic capacitance loaded on the open gap 261, the filtered signal resonates and is consumed, so that the open gap 261 can Filtering out the filtered signal from the input signal realizes specific frequency-selective filtering of the input signal. Moreover, when the input signal flows from the input end 221 through the portion of the suspension section 222 provided with the open gap 261 , the existence of the open gap 261 effectively prolongs the transmission path of the signal. For example, as shown in Figure 6, the signal L flowing through the open circuit 2222, because the signal path of the open circuit 2222 is cut off, the signal L flowing through the open circuit 2222 can only flow toward the transmission belt 2221 along the edge of the open circuit gap 261 to form Backflow effectively prolongs the transmission path of the signal. The extension of the signal transmission path is beneficial to filter out signal resonance, and further helps to filter out the filtered signal. Thus, the input signal received by the input terminal 221 is filtered through the open gap 261 at the suspension section 222 of the main feeder 22, and then fed to the power splitter 23, and then output from different output terminals 241 along the output feeder 24, so that each None of the signals output from the output terminal 241 contain unwanted signals (ie, interference signals), and the phase shifter 100 implements a filtering function through the open gap 261 .

Please refer to FIG. 2, FIG. 3 and FIG. 6 together. The phase shifter 100 of the present application integrates the filtering function by setting the open circuit gap 261 on the suspension section 222 of the main feeder 22, and realizes filtering in a specific frequency band (that is, removing interference signals) . The design of the open slot 261 has a simple structure, which not only greatly reduces the filtering cost of the phase shifter 100, but also does not increase the size of the main feeder 22, and the space utilization rate is high, which is beneficial for the main feeder 22 to be placed in the storage chamber 11 (i.e. The layout inside the main body 10) is beneficial to the miniaturization of the main body 10, and further facilitates the miniaturization of the phase shifter 100. Therefore, the phase shifter 100 of the present application can be applied to the same small, micro or smaller base station antenna 200 as the existing phase shifter without filtering function, which facilitates integration. In addition, when the phase shifter 100 is integrated into the base station antenna 200, it can effectively improve the inter-frequency isolation of the base station antenna 200 and improve the communication quality of the base station antenna 200; compared with the prior art, the design of the open slot 261 is not only effective The passive intermodulation risk introduced by the increase of screws or solder joints is avoided, and the communication quality is improved; moreover, the additional insertion loss introduced by an external filter is avoided, and the radiation efficiency of the base station antenna 200 is improved.

It should be noted that, in this embodiment, the width of the open circuit gap 261 (that is, the width of the gap between the transmission belt 2221 and the open circuit belt 2222) should be between 1 mm and 2 mm, which is more conducive to loading parasitic capacitance to filter the filtered signal remove. In this embodiment, the average width of the open slit 261 is 1.5 mm.

Please refer to FIG. 3 and FIG. 6 together. In this embodiment, the path length of the open slot 261 is 1/8 to 1/4 of the filter wavelength, and the filter wavelength refers to the signal filtered by the open slot 261 ( That is, the wavelength of the interfering signal). By adjusting the path length of the open slit 261 , the user can adjust the wavelength range of the signal filtered by the open slit 261 , which is convenient for the user to filter out unnecessary signals. The adjustment is simple and cost-effective, and the processing cost of the phase shifter 100 is reduced. In this embodiment, the path length of the open slot 261 is one-sixth of the filtering wavelength. In other embodiments, the path length of the open slot 261 may also be one-fifth, one-eighth or other values within the range of one-eighth to one-fourth of the filtering wavelength.

In this embodiment, as shown in FIGS. 5 and 6 , the shape of the opening slit 261 is L-shaped. Specifically, the open slot 261 includes a first section 2611 and a second section 2612, both of which are strip-shaped slots, and the first section 2611 is along the length direction of the suspension section 222 (that is, the first direction X ), the second section 2612 communicates with the end of the first section 2611 away from the input end 221, the second section 2612 extends along the width direction of the suspension section 222 (that is, the third direction Z) and runs through the side of the suspension section 222 and the The receiving cavity 11 is connected. At this time, the path length of the open gap 261 refers to the sum of the lengths of the first segment 2611 and the second segment 2612 . Thus, the user can adjust the wavelength range of the signal filtered out by the open gap 261 by adjusting the length of the first section 2611 and/or the second section 2612, and the adjustment is simple; and since the first section 2611 and the second section 2612 are band shaped gap, simple structure, easy processing, and reduced processing costs. It can be understood that when the length of the second segment 2612 is very small compared with the length of the first segment 2611, the length of the second segment 2612 can be ignored. At this time, the user can quickly confirm the first segment according to the wavelength range of the signal to be filtered out. The length of section 2611 reduces adjustment difficulty and processing cost.

In the present application, the shape of the open slit 261 is not specifically limited. For example, in another embodiment, as shown in FIG. 8 , the open gap 261 may also include a first section 2613, a second section 2614, a third section 2615, and a fourth section 2616 connected end to end in sequence. The first section 2613, The second section 2614, the third section 2615, and the fourth section 2616 are strip-shaped gaps, the first section 2613 and the third section 2615 extend along the width direction of the suspension section 222 (ie, the third direction Z), and the second section 2614 And the fourth section 2616 extends along the length direction of the suspension section 222 (ie, the first direction X); wherein, the end of the first section 2613 away from the second section 2614 is along the width direction of the suspension section 222 (ie, the third direction Z) through the suspension section 222 . At this time, the path length of the open gap 261 refers to the sum of the lengths of the first segment 2613 , the second segment 2614 , the third segment 2615 and the fourth segment 2616 . By adjusting the lengths of the first segment 2613 , the second segment 2614 , the third segment 2615 and the fourth segment 2616 , the user can also adjust the wavelength range of the signal filtered out by the open slot 261 .

Please refer to FIG. 4 to FIG. 7 , the filter structure 26 includes a fixing frame 262 corresponding to the open slot 261 . The fixing frame 262 is accommodated in the main cavity 111 (namely, the receiving cavity 11), and the fixing frame 262 is detachably connected with the suspension section 222. The fixing frame 262 is used to limit the transmission belt 2221 and the open circuit belt 2222, so as to limit the width of the open circuit gap 261 . In this embodiment, the fixing frame 262 is a plastic frame. It can be understood that the material of the fixing frame 262 may also be dielectric materials such as glass and rubber, which is not specifically limited in this application.

In this embodiment, the fixing frame 262 includes a frame body 2621 and a plurality of buckles 2622 , and the plurality of buckles 2622 are disposed on a surface of the frame body 2621 facing the suspending section 222 . The frame body 2621 is detachably connected to the suspension section 222 , and the transmission belt 2221 and the open circuit belt 2222 are relatively fixed through a plurality of buckles 2622 . When the frame body 2621 is fixedly connected with the suspension section 222 and the suspension belt line 20 is loaded into the receiving cavity 11 , the fixing frame 262 can be loaded into the main cavity 111 along with the suspension section 222 . When the suspension belt line 20 loaded into the storage cavity 11 is fixed and suspended in the storage cavity 11 by the support device 40, the frame body 2621 (that is, the fixed frame 262) fixedly connected with the suspension section 222 is fixed in the main cavity 111 middle. In this embodiment, the supporting device 40 is a buckle protruding from the wall of the receiving chamber 11, and the number of the supporting device 40 is four. As shown in FIG. The two supporting devices 40 are clamped, and the two output feeders 24 are respectively clamped with one supporting device 40 , so that the suspension belt line 20 is fixed and suspended in the receiving cavity 11 by the four supporting devices 40 .

In this embodiment, as shown in FIG. 3 , FIG. 6 and FIG. 7 , the suspension section 222 is provided with limiting holes on both sides of the open gap 261 along its length direction (namely the first direction X), and the limiting holes include The first limiting hole 2226 and the second limiting hole 2227, the first limiting hole 2226 is farther away from the input end 221 than the second limiting hole 2227, and the surface of the frame body 2621 facing the suspension section 222 is provided with the second limiting hole. A fixing buckle 2623 corresponding to a limiting hole 2226 and a raised point 2624 corresponding to the second limiting hole 2227, the fixing buckle 2623 is clamped in the first limiting hole 2226, and the raised point 2624 is along the thickness direction of the suspension section 222 ( That is, the second direction Y) is embedded in the second limiting hole 2227 . In this embodiment, the first limiting hole 2226 is a square hole, and the second limiting hole 2227 is a circular hole. It can be understood that the first limiting hole 2226 and the second limiting hole 2227 can also be circular holes Or they are all square holes, etc. The present application does not specifically limit the shapes of the first limiting hole 2226 and the second limiting hole 2227 . The frame body 2621 can be stably and firmly fixedly connected with the suspension section 222 through the cooperation of the fixing buckle 2623 and the first limiting hole 2226 and the protrusion 2624 and the second limiting hole 2227, thereby preventing the frame body 2621 from facing the suspension section. 222 shakes or even moves. Moreover, the design of the fixing buckle 2623 and the protruding point 2624 has a simple structure, low processing cost, and is convenient for assembly and disassembly.

In other embodiments, the first limiting hole 2226 is closer to the input end 221 than the second limiting hole 2227, the fixing buckle 2623 is locked in the first limiting hole 2226, and the protrusion 2624 is embedded in the second limiting hole 2227. In the limiting hole 2227. In other embodiments, the frame body 2621 can also be provided with two fixing buckles 2623 or two protrusions 2624 corresponding to the first limiting hole 2226 and the second limiting hole 2227 on the surface facing the suspension section 222 The frame body 2621 is fixedly connected to the suspension section 222 through the fitting connection between the two fixing buckles 2623 or the two protruding points 2624 and the first limiting hole 2226 and the second limiting hole 2227 .

In addition, in this embodiment, as shown in FIG. 3 , when the suspension belt line 20 is fixed and suspended in the receiving cavity 11, the frame body 2621 also plays a role of further supporting the suspension section 222 to further ensure the suspension. The placement section 222 can be stably suspended in the main cavity 111 . Specifically, opposite ends of the frame body 2621 in the thickness direction of the suspension section 222 (that is, the second direction Y) are respectively pressed against the walls of the main cavity 111, and in the width direction of the suspension section 222 (that is, the second direction Y). The opposite ends of the three directions Z) are respectively pressed against the walls of the main cavity 111, so that the frame body 2621 located in the main cavity 111 is in the thickness direction (that is, the second direction Y) and the width direction (the second direction Y) of the suspension section 222 ( The third direction Z) is limited, and then the suspension section 222 fixedly connected with the frame body 2621 is further limited in the thickness direction and width direction of the suspension section 222, and further prevents the suspension section 222 from interfering with the main cavity. The walls of the cavity 111 are in contact, which further ensures that the suspension section 222 can be stably suspended in the main cavity 111 . In other embodiments, there may be a gap between the frame body 2621 fixed to the suspension section 222 and the cavity wall of the main cavity 111 , that is, the frame body 2621 is suspended in the main cavity 111 .

In this embodiment, as shown in FIG. 3 , FIG. 6 and FIG. 7 , the transmission belt 2221 and the open circuit belt 2222 are respectively provided with a plurality of cards on both sides of the suspension section 222 in the width direction (that is, the third direction Z). The slots, a plurality of buckles 2622 are engaged with the plurality of slots one by one to fix the transmission belt 2221 and the open circuit belt 2222 on the fixing frame 262 respectively.

Specifically, the side of the transmission belt 2221 and the opening belt 2222 facing away from the opening gap 261 are respectively provided with a plurality of first card slots 2228, and the side facing the opening slot 261 is respectively provided with a plurality of second card slots 2229. A buckle 2622 includes a plurality of first buckles 2625 and a plurality of second buckles 2626, the first buckles 2625 correspond to the first grooves 2228, and each first buckle 2625 is along the thickness direction of the suspension section 222 ( That is, the second direction Y) is inserted into the gap between the cavity wall of the main cavity 111 and the transmission belt 2221 or the open circuit belt 2222 to engage with the corresponding first locking groove 2228, that is, the first buckle 2625 is located outside the open circuit gap 261; The buckles 2626 correspond to the second slots 2229, and each second buckle 2626 is inserted into the open gap 261 along the thickness direction of the suspending section 222 to snap into the corresponding second slot 2229, so that the first buckle 2625 and The first slot 2228 and the second buckle 2626 are connected with the second slot 2229, and the transmission belt 2221 and the open circuit belt 2222 are fixedly connected to the fixed frame 262, so that the transmission belt 2221 and the open circuit belt 2222 are relatively fixed, and the structure is stable and Simple and low processing cost. The relative deflection or shaking of the transmission belt 2221 and the open circuit belt 2222 can be avoided by the fixing frame 262, for example, the open circuit belt 2222 deflects relative to the transmission belt 2221 along the thickness direction of the suspension section 222 (ie, the second direction Y). Therefore, during the working process of the phase shifter 100 , the fixing frame 262 can ensure that the width of the open gap 261 does not change. In this way, it is effectively avoided that the width of the open gap 261 changes. Moreover, the second buckle 2626 inserted into the open slot 261 further ensures the width of the open slot 261 and ensures that the open slot 261 can stably and reliably load parasitic capacitance, thereby ensuring that the open slot 261 can stably filter out signals.

In other embodiments, the fixed frame 262 may also include a frame body 2621 and a limiting body, the limiting body is protruded on the surface of the frame body 2621 facing the suspension section 222, the limiting body is located in the open gap 261, and the limiting body The body is against the sides of the transmission belt 2221 and the open circuit belt 2222 facing the open circuit gap 261 . In this way, the width of the open-circuit gap 261 can also be ensured not to change by the limiting body abutting against the transmission belt 2221 and the open-circuit belt 2222 , ensuring that the open-circuit gap 261 can filter out signals stably.

Please refer to FIG. 3 , FIG. 5 and FIG. 6 again. In this embodiment, there is one open slot 261 and one fixing frame 262 , and the fixing frame 262 corresponds to the opening slot 261 . It can be understood that the number of open slits 261 and fixing brackets 262 may be more, and a plurality of open slits 261 are arranged on the suspension section 222 at intervals. For example, in another embodiment, as shown in FIG. 9 , there are two open slits 261 and two fixing frames 262, and the two open slits 261 are spaced along the length direction of the suspension section 222 (ie, the first direction X). It is provided that the two fixing frames 262 correspond to the two opening slots 261 one by one, and the fixing frames 262 are used to control the slot width of the corresponding opening slots 261 . The path lengths of the two open slots 261 may be different, so that the two open slots 261 can respectively filter out signals in different wavelength ranges. For example, the open circuit slot 261 includes a first open circuit slot and a second open circuit slot, the path length of the first open circuit slot is X, the path length of the second open circuit slot is Y, X and Y are different, and the first open circuit slot can filter wavelength For signals in the range of 4X-8X, the second open slot can filter out signals in the wavelength range of 4Y-8Y, so the two open slots 261 can respectively filter out signals in different wavelength ranges. Since the two open slots 261 can respectively filter out signals in different wavelength ranges, this effectively increases the working bandwidth of the phase shifter 100 . In other embodiments, the two open slits 261 may also be arranged at intervals along the width direction of the suspension section 222 (ie, the third direction Z).

Please refer to Fig. 2, Fig. 3 and Fig. 6 again, the phase shifter 100 of the present application integrates the filtering function by setting the open circuit gap 261 in the suspension section 222 of the main feeder 22, and realizes filtering in a specific frequency band (that is, removing interference waves), The user can adjust the wavelength range of the signal filtered by the open slot 261 only by adjusting the path length of the open slot 261 , which is convenient for the user to adjust. Moreover, the user can filter signals of different wavelength ranges by setting a plurality of open slots 261 with different path lengths on the suspension section 222 , thereby effectively increasing the working bandwidth of the phase shifter 100 . In addition, the design of the fixing frame 262 ensures that the open gap 261 can stably and reliably load the parasitic capacitance, thereby ensuring that the phase shifter 100 can stably filter signals of a specific frequency band. In addition, the design of the open slot 261 has a simple structure, which greatly reduces the filtering cost of the phase shifter 100, and does not increase the size of the main feeder 22, and the space utilization rate is high, which is beneficial for the main feeder 22 to be placed in the storage chamber 11 ( That is, the layout inside the main body 10 is beneficial to the miniaturization of the main body 10 , and further to the miniaturization of the phase shifter 100 . Therefore, the phase shifter 100 of the present application can be applied to the same small, micro or smaller base station antenna 200 as the existing phase shifter without filtering function, which facilitates integration. In addition, when the phase shifter 100 is integrated into the base station antenna 200, since it has a filtering function, it can effectively improve the inter-frequency isolation of the base station antenna 200 and improve the communication quality of the base station antenna 200. Compared with the prior art, the open circuit The design of the slot 261 not only effectively avoids the passive intermodulation risk introduced by the increase of screws or solder joints, but also improves the communication quality; moreover, it avoids the additional insertion loss introduced by the external filter, and improves the base station The radiation efficiency of the antenna 200.

Please refer to FIG. 3 , FIG. 4 , FIG. 5 and FIG. 10 together. In this embodiment, the second connecting section 224 is provided with a connecting hole 2241 (as shown in FIG. 5 ), and the connecting hole 2241 is along the thickness direction of the suspension section 222 (that is, the second direction Y) runs through the second connecting section 224 . The power distribution junction 23 protrudes along the thickness direction of the suspension section 222 (that is, the second direction Y) with a plug-in end 231, and the plug-in end 231 is glued or welded along the thickness direction of the suspension section 222 (the second direction Y). The second connecting section 224 is connected to the power splitting junction 23 by fixedly inserting it into the connecting hole 2241 by other processes. The structure is stable and simple, the processing cost is low, and it is easy to disassemble and assemble, which ensures the stability of the internal structure of the phase shifter 100 . In other embodiments, the work splitting junction 23 may also be directly fixed to the second connecting section 224 by welding or gluing, and the work splitting junction 23 and the second connecting section 224 may also be integrally formed directly. The signal is fed from the input terminal 221 to the power splitting junction 23 sequentially along the suspension section 222 , the first connection section 223 and the second connection section 224 , and then output from different output terminals 241 through the output feeder 24 . In other embodiments, the first connecting section 223 and the second connecting section 224 can also be omitted, that is, the work splitting junction 23 is fixedly connected with the suspension section 222 directly by welding or gluing; or, the work splitting junction 23 and the suspension section The setting section 222 is integrally formed.

Please refer to FIGS. 2 to 4 again. The phase shifting unit 30 can move relative to the output feeder 24 of the suspended strip line 20 to change the phase of the output signal. The signal output to the radiation unit 2012. In this embodiment, the phase shifting unit 30 is a dielectric body. The phase shifting unit 30 is located in the sub-cavity 112 . The phase shifting unit 30 is disposed on one side or both sides of the output feeder 24 to cover the output feeder 24 ; wherein, the phase shifter 30 and the output feeder 24 may be in direct contact, or there may be a gap. The phase-shifting unit 30 can move relative to the output feeder 24 and adjust the area covered by the phase-shifting unit 30 of the output feeder 24, thereby continuously changing the phase value from the power division junction 23 to the output terminal 241, realizing the continuous change of the output signal phase, and then changing The electric downtilt angle of the base station antenna 200 is adjusted by the phase of the radiation unit 2012, which is convenient for users to adjust.

Specifically, the quantity of the phase-shifting unit 30 is one, and the output feeder 24 includes a first output section 242 and a second output section 243, and one end of the first output section 242 and the second output section 243 is connected with the power dividing junction 23, and the other One end is the output end 241 respectively, and the first output section 242 and the second output section 243 are arranged in the auxiliary cavity 112 along the length direction of the suspension section 222 (that is, the first direction X). The output end 241 of the first output section 242 In the length direction of the suspension section 222 , the output end 241 of the second output section 243 is farther away from the input end 221 , and the phase shift unit 30 covers the first output section 242 , the second output section 243 and the power splitting junction 23 . The movement of the phase shifting unit 30 along the length direction of the suspension section 222 can simultaneously and continuously change the areas covered by the phase shifting unit 30 of the first output section 242 and the second output section 243, thereby continuously adjusting the first output section 242 and the second output section 242 simultaneously. The equivalent permittivity of the two output sections 243 , so that the phases from the power splitting junction 23 to the two output terminals 241 can be continuously changed at the same time, thereby simultaneously changing the phases of the output signals output from the two output terminals 241 . For example, when the phase shifting unit 30 moves relative to the output feeder 24 along the first direction X and away from the input end 221, the area covered by the phase shifting unit 30 of the second output section 243 decreases, so that the equivalent of the second output section 243 The dielectric constant decreases; the area covered by the phase shifting unit 30 of the first output section 242 increases, so that the equivalent dielectric constant of the first output section 242 increases, thereby, the power splitting junction 23 to the two output terminals 241 The phase of both changes simultaneously, thereby changing the signal of the output signal.

It can be understood that the number of phase shifting units 30 can also correspond to the number of output ends 241, and each phase shifting unit 30 is respectively arranged on one side or both sides of the output section between an output end 241 and the power splitting junction 23 and covers the In the output section, each phase shift unit 30 moves relative to the output feeder 24 to adjust the area of the corresponding output section covered by the phase shift unit 30 , thereby changing the phases from different output terminals 241 to the power splitter 23 . For example, the number of phase shifting units 30 can be two, and the two phase shifting units are respectively called a first phase shifting unit and a second phase shifting unit, and the first phase shifting unit is arranged on one side or both sides of the first output section 242. side and cover the first output section 242, the second phase shifting unit is arranged on one side or both sides of the second output section 243 and covers the second output section 243, the first phase shifting unit and the second phase shifting unit are respectively opposite to the output feeder 24 to change the area of the first output section 242 covered by the first phase shifting unit, and the area covered by the second output section 243 by the second phase shifting unit, thereby changing the phase of the output signal.

Please refer to FIG. 2 and FIG. 3 again. The phase shifter 100 of this embodiment has a phase shifting function and a filtering function. First, filter the signal in a specific frequency band through the open slot 261 (i.e., remove the interference wave), then perform phase-shift processing on the signal, and then send the signal to each radiation unit 2012 of the antenna 201, so as to control the electromagnetic beam of the base station antenna 200. Adjusting the downtilt angle effectively reduces the interference of unnecessary signals to the radiation unit 2012 , thereby ensuring that each frequency band of the base station antenna 200 is free from interference, improving inter-frequency isolation, and improving the communication quality of the base station antenna 200 . Compared with the scheme of adding an external filter to the phase shifter 100 to improve inter-frequency isolation, the phase shifter 100 integrating the filtering function and the phase shifting function not only reduces the number of screws or solder joints, but also reduces the risk of passive intermodulation , the communication quality of the base station antenna 200 is improved, and the additional insertion loss introduced by the external filter is avoided, and the radiation efficiency of the base station antenna 200 is effectively improved. In addition, compared with the original phase shifter with only the phase shifting function, the phase shifter 100 of this embodiment has integrated the phase shifting function and the filtering function, and its overall size and internal space volume are not increased. Therefore, with the development of miniaturization of the base station antenna 200 , the phase shifter 100 of this embodiment can always integrate a filtering function on the basis of ensuring its phase shifting function, which is beneficial to the miniaturization of the base station antenna 200 .

The above are only some examples and implementations of the present application, and the protection scope of the present application is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and should cover all Within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (17)

1. A phase shifter, characterized in that it comprises a main body and a suspension belt line, the main body includes a housing cavity, the suspension belt line is accommodated in the storage cavity, and the suspension belt line includes a main feeder , power splitting junction, output feeder and filter structure; One end of the main feeder is an input end, the other end is connected to the power splitter, the other end of the power splitter is connected to the output feeder, and the output feeder includes at least two output ends, each output Both ends are far away from the power splitting junction, the main feeder includes a suspension section, and the filter structure includes an open circuit gap arranged on the suspension section, and the open circuit gap runs through the suspension section in the thickness direction of the suspension section. The suspension section, and in the width direction of the suspension section, the suspension section is divided into a transmission belt and an open circuit belt arranged in parallel, and the length direction of the open circuit belt and the transmission belt is the same as that of the suspension section The length directions of the open-circuit belts are the same, wherein one end of the open-circuit belt is connected to the transmission belt, and the other end is suspended in the storage cavity. 2. The phase shifter according to claim 1, wherein the path length of the open slot is one-eighth to one-fourth of the filtering wavelength. 3. The phase shifter according to claim 1, wherein the open gap comprises a first section and a second section, the first section extends along the length direction of the suspension section, and the second section The segment communicates with an end of the first segment away from the input end, and the second segment extends along the width direction of the suspension segment and passes through a side of the suspension segment to communicate with the receiving cavity. 4. The phase shifter according to claim 1, wherein the open-circuit gap comprises a first segment, a second segment, a third segment and a fourth segment connected end to end in sequence, and the first segment and the The third segment extends along the width direction of the suspension segment, and the second segment and the fourth segment extend along the length direction of the suspension segment; wherein, the first segment is far away from the second segment One end passes through the suspension section along the width direction of the suspension section. 5. The phase shifter according to any one of claims 1 to 4, wherein the number of the open slots is multiple, and a plurality of the open slots are arranged at intervals on the main feeder, and a plurality of The path lengths of the open slots are different. 6. The phase shifter according to any one of claims 1 to 4, wherein the filtering structure includes a fixing frame, the main feeder is fixed and suspended in the receiving cavity, and the fixing frame accommodates In the storage cavity, the fixing frame is detachably connected to the suspension section, and the fixing frame is used for limiting the transmission belt and the open-circuit belt. 7. The phase shifter according to claim 6, wherein the fixed frame includes a limiter, the limiter is located in the open gap, the limiter is connected to the transmission belt and the The open-circuit band abuts against the side of the open-circuit gap. 8. The phase shifter according to claim 7, wherein the fixed frame includes a frame body, the limiter is protruded on the surface of the frame body facing the suspension section, and the frame The opposite ends of the body in the thickness direction of the suspension section are respectively pressed against the walls of the accommodation cavity, and the opposite ends of the suspension section in the width direction are respectively pressed against the walls of the accommodation cavity. The cavity wall resists pressure. 9. The phase shifter according to claim 6, wherein the fixing frame includes a plurality of buckles, and the transmission belt and the open-circuit belt are respectively located on both sides in the width direction of the suspension section. A plurality of card slots are provided, and the plurality of buckles are engaged with the plurality of card slots in one-to-one correspondence. 10. The phase shifter according to claim 6, wherein the fixing frame comprises a frame body, and the suspension section is provided with a limit hole passing through the suspension section, and the limit hole is located at On opposite sides of the open gap, the frame body is provided with a protrusion or a fixing buckle corresponding to the limiting hole, and the protrusion or the fixing buckle is clamped in the limiting hole. 11. The phase shifter according to any one of claims 1 to 4, wherein the main feeder further comprises a first connecting section and a second connecting section, one end of the first connecting section is connected to the suspension section of the transmission live connection, the other end is connected to the second connection section, the other end of the second connection section is connected to the power division junction, one end of the open circuit belt is connected to the transmission belt, and the open circuit belt is connected to the transmission belt. The other end of the belt is spaced from the conveyor belt through the open gap. 12. The phase shifter according to claim 11, characterized in that, the second connection section is provided with a connection hole near the end of the power division junction, and the power division junction is protrudingly provided with a plug-in end, and the The plug-in end is plugged into the connection hole, so that the main feeder is connected to the power division junction. 13. The phase shifter according to any one of claims 1 to 4, wherein the accommodating cavity comprises a main cavity and a secondary cavity, and both the primary cavity and the secondary cavity are along the extending in the length direction, the auxiliary chamber is located on one side of the main chamber and communicates with the main chamber along the thickness direction of the suspension section, and the input end is located in a side of the main chamber far away from the auxiliary chamber side position, the main feeder extends from the main cavity to the secondary cavity, the power splitter and the output feeder are both located in the secondary cavity; wherein the suspension section is located in the main cavity middle. 14. The phase shifter according to any one of claims 1 to 4, characterized in that, the phase shifter further comprises a phase shifter, the phase shifter is located in the housing cavity, and the phase shifter move relative to the output feeder to adjust the phase between the output end and the power splitter. 15. The phase shifter according to claim 14, wherein the phase shifter is a dielectric body, the phase shifter covers the output feeder, and the phase shifter moves relative to the output feeder to adjust The area of the output feeder covered by the phase shifting unit. 16. A base station antenna, characterized by comprising the phase shifter and the antenna according to any one of claims 1 to 15, and the output end is electrically connected to the antenna. 17. A base station, comprising the base station antenna according to claim 16 and a base station server, the base station server being electrically connected to the base station antenna.

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