CN218215692U - Reflector for base station antenna and base station antenna - Google Patents

Abstract

The present disclosure relates to a reflector for a base station antenna, wherein the reflector includes: a body; and at least one through slot provided in the body, the at least one through slot is configured to be used in the At least one stub-type filtering structure is formed in the body, the stub-type filtering structure configured for at least partially suppressing in the body within the operating frequency band of the radiating element mounted after the reflector Induced current. Furthermore, the present disclosure relates to a base station antenna.

Description

Reflectors and Base Station Antennas for Base Station Antennas

technical field

The present disclosure relates to the field of radio communication, and more particularly, the present disclosure relates to a reflector for a base station antenna and a base station antenna.

Background technique

With the development of wireless communication technology, integrated base station antennas including passive modules and active modules appear. The passive module may include one or more arrays of radiating elements configured to generate a relatively static antenna beam, such as an antenna beam configured to cover a 120-degree sector (in the azimuth plane) of the integrated base station antenna . Arrays may include, for example, arrays operating under second generation (2G), third generation (3G) or fourth generation (4G) cellular network standards. These arrays are not configured to perform active beamforming operations, although they often have a remote electronic tilt (RET) feature that allows electromechanical means to change the pointing direction of the antenna beam in the elevation plane in order to change the antenna beam coverage area. Active modules may include one or more arrays of radiating elements operating under fifth generation (5G or later) cellular network standards. In the fifth-generation mobile communication, the frequency range of communication includes the main frequency band (a specific part of the range from 450MHz to 6GHz) and the extended frequency band (24GHz to 73GHz, that is, the millimeter wave frequency band, mainly 28GHz, 39GHz, 60GHz and 73GHz) . The frequency range to be used in the fifth generation of mobile communication includes frequency bands with higher frequencies than those used in previous generations of mobile communication. These arrays typically have individual amplitude and phase control and perform active beamforming for a subset of the radiating elements within them.

As shown in FIGS. 1 and 2 , the integrated base station antenna 10 may include a passive module 11 and an active module 12 mounted on the back or rear of the passive module 11 . The passive module 11 includes one or more arrays of radiating elements 115 mounted to extend forwardly from the reflector 13 (as shown in FIG. 3 ) of the passive module 11 . The reflector 13 serves to reflect electromagnetic waves emitted backward by the radiating elements 115 in the forward direction and also serves as a ground plane for the radiating elements 115 of the array. The active module 12 can emit high-frequency electromagnetic waves (for example, high-frequency electromagnetic waves in the 2.3-4.2 GHz frequency band or a part thereof). At least a part of the active module 12 is generally mounted behind the passive module 11 .

Since the reflector 13 in the passive module 11 is arranged before the active module 12, when the electromagnetic wave from the active module 12 radiates forward and passes through the passive module 11, it may form on the reflector 13 of the passive module 11 In other words, an induced current is induced, for example, an induced current within the working frequency band of the active module 12 . Such induced currents may lead to poor radiation performance of the integrated base station antenna 10, such as distortion of the radiation pattern or "antenna beam" of the active module 12 and/or reduced cross-polarization discrimination, etc. Current countermeasures generally include reducing the size of the reflector 13, however the effect of said countermeasures is limited because the size of the reflector 13 can only be reduced to a limited extent and there will still be Induced current. Furthermore, as the size of the reflector 13 decreases, the radiation pattern of the passive module 11 also deteriorates. These are not expected.

Utility model content

Therefore, an object of the present disclosure is to provide a reflector for a base station antenna and a base station antenna that can overcome at least one defect in the prior art.

According to a first aspect of the present disclosure, there is provided a reflector for a base station antenna, wherein the reflector includes: a body; and at least one through slot provided in the body, the at least one through slot configured For forming at least one stub-type filter structure in the body, the stub-type filter structure is configured for at least partially suppressing radiation installed behind the reflector in the body Induced current in the operating frequency band of a component.

In some embodiments, the at least one stub-type filtering structure may include at least one open stub.

In some embodiments, the longitudinal length of the at least one open stub may be 0.25+n/2 times the equivalent wavelength, where n is a natural number, wherein the equivalent wavelength is a predetermined frequency in the operating frequency band The wavelength corresponding to the frequency point.

In some embodiments, the longitudinal length of the at least one open stub may be configured to be 0.25 times the equivalent wavelength.

In some embodiments, the predetermined frequency point may be a center frequency point of the operating frequency band.

In some embodiments, the at least one through-slot may comprise an H-shaped, L-shaped, M-shaped, U-shaped, S-shaped or fan-shaped through-slot for forming the at least one open stub.

In some embodiments, the at least one stub-type filtering structure may include at least one shorting stub.

In some embodiments, the longitudinal length of the at least one short-circuit stub may be N/2 times the equivalent wavelength, where N is a positive integer, wherein the equivalent wavelength is a predetermined frequency in the operating frequency band point corresponding to the wavelength.

In some embodiments, the longitudinal length of the at least one short-circuit stub may be configured to be 0.5 times the equivalent wavelength.

In some embodiments, the predetermined frequency point may be a center frequency point of the operating frequency band.

In some embodiments, the at least one through slot may include two through slots for forming a single shorting stub formed between the two through slots.

In some embodiments, the through-slot can be configured as a metal-free cutout on the body.

In some embodiments, the at least one stub-type filtering structure may include a plurality of stub-type filtering structures arranged aperiodically along at least one direction.

In some embodiments, the at least one direction may include a vertical direction and/or a horizontal direction of the reflector.

In some embodiments, the plurality of stub-type filtering structures may include at least one open stub and at least one shorted stub.

In some embodiments, at least two stub-type filter structures of the plurality of stub-type filter structures may have different orientations, sizes and/or shapes.

In some embodiments, the at least one stub-type filtering structure may include a first stub-type filtering structure configured to at least partially suppress a first induced current in a first frequency band; and a second stub-type filtering structure configured to at least partially suppress a second induced current in a predetermined second frequency band current; wherein the first frequency band is the operating frequency band, and the first frequency band is different from the second frequency band.

In some embodiments, the first stub filter structure and the second stub filter structure may be open stubs with different longitudinal lengths, or may be short circuits with different longitudinal lengths stub.

In some embodiments, one stub-type filter structure of the first stub-type filter structure and the second stub-type filter structure may be an open-circuit stub, and the other stub The type filter structure can be a short-circuit stub.

In some embodiments, the at least one stub-type filtering structure may comprise a multi-order stub-type filtering structure.

In some embodiments, the body may include a reflective strip section extending in a vertical direction, the reflective strip section is configured to install a radiating element, and the at least one through groove is at least partially disposed in the on the reflective strip section, for forming at least one stub filter structure on the reflective strip section.

In some embodiments, the body may include a first reflective strip section and a second reflective strip section on the side in the horizontal direction, and a Open your mouth.

In some embodiments, the reflector may include a vertically extending barrier extending forward from the body of the reflector.

In some embodiments, at least one further through-slot may be provided on the barrier, the at least one further through-slot configured to form at least one further stub-shaped A filtering structure, the at least one further stub-type filtering structure is configured for at least partially suppressing induced currents in the operating frequency band in the barrier.

According to a first aspect of the present disclosure, there is provided a base station antenna, the base station antenna comprising the above-mentioned reflector for a base station antenna.

In some embodiments, the base station antenna may include a passive module and an active module installed behind the passive module, wherein the reflector and the reflector separate from the reflector are installed in the passive module. A compensation plate, the reflection compensation plate includes a frequency selective surface composed of a plurality of pattern units arranged periodically.

In some embodiments, the frequency selective surface may be configured to reflect electromagnetic waves in a second frequency band while allowing passage of electromagnetic waves in a first frequency band, wherein the first frequency band corresponds to at least a portion of the radiating elements in the passive module and the second frequency band corresponds to the operating frequency band of at least a portion of the radiating elements in the active module.

In some embodiments, the reflector may include a first reflective strip section and a second reflective strip section for installing radiation elements, and a reflective strip section is provided between the first reflective strip section and the second reflective strip section An opening, wherein the reflection compensating plate is mounted behind the reflector and at least partially overlaps the opening in projection in the forward direction.

In some embodiments, the reflection compensation plate may be installed before the rear cover of the passive module, or the reflection compensation plate may be formed as at least a part of the rear cover of the passive module.

In some embodiments, the plurality of pattern units may be metal pattern units constructed on a metal plate or a printed circuit board.

In some embodiments, the passive module may include a 4G module.

In some embodiments, the active module may include a 5G module.

Description of drawings

The present disclosure will be described in more detail below by means of specific embodiments with reference to the accompanying drawings. A brief description of the schematic drawings follows:

Fig. 1 is a schematic perspective view of a base station antenna according to the prior art, the base station antenna includes a passive module and an active module installed on the back of the passive module;

Figure 2 is a schematic end view in the base station antenna shown in Figure 1;

Figure 3 is a perspective view of a reflector used in the base station antenna shown in Figure 1;

4 is a partial schematic perspective view of a passive module of a base station antenna according to some embodiments of the present disclosure;

Figure 5 is a partial schematic front view of the base station antenna of Figure 4, showing reflective strip sections of the reflectors within the passive modules together with the reflector and radiating element arrays within the active modules at the rear;

Figure 6 is a partial schematic front view of a base station antenna showing reflective strip segments of reflectors within passive modules together with reflector and radiating element arrays within active modules at the rear in accordance with further embodiments of the present disclosure;

Figure 7 is a partial schematic front view of a base station antenna showing reflective strip segments of reflectors within passive modules together with reflector and radiating element arrays within active modules at the rear, according to further embodiments of the present disclosure;

FIG. 8 is a front view of a stub filter structure in a reflector of a base station antenna according to other embodiments of the present disclosure;

9 is a partial schematic perspective view of a base station antenna according to other embodiments of the present disclosure, wherein the reflector in the passive module includes a reflective strip segment and a barrier extending in a forward direction;

Figure 10 is a partial schematic front view of a base station antenna showing a reflective strip section of a reflector within a passive module along with an array of reflectors and radiating elements within an active module at the rear, according to further embodiments of the present disclosure.

detailed description

The present disclosure will be described below with reference to the accompanying drawings, which illustrate several embodiments of the disclosure. However, it should be understood that the present disclosure can be presented in many different ways, and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and contribute to this Those skilled in the art fully explain the protection scope of the present disclosure. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide even more additional embodiments.

It should be understood that the terminology herein is used to describe particular embodiments only and is not intended to limit the scope of the present disclosure. Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the meanings commonly understood by those skilled in the art. Well-known functions or constructions may not be described in detail for brevity and/or clarity.

In this text, terms of spatial relation such as "upper", "lower", "left", "right", "front", "rear", "high", "low", etc. can describe the relation between one feature and another feature. Relationships in attached drawings. It will be understood that the spatially relative terms encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, features described as "below" other features would then be oriented "above" the other features. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the relative spatial relationships interpreted accordingly.

Herein, the term "A or B" includes "A and B" and "A or B", and does not exclusively include only "A" or only "B", unless specifically stated otherwise.

As used herein, the word "schematic" or "exemplary" means "serving as an example, instance or illustration" rather than as a "model" to be exactly reproduced. Any implementation described illustratively herein is not necessarily to be construed as preferred or advantageous over other implementations. Furthermore, the present disclosure is not to be bound by any expressed or implied theory presented in the foregoing technical field, background, utility model summary or detailed description.

As used herein, the term "substantially" is meant to include any minor variations due to design or manufacturing defects, device or component tolerances, environmental influences, and/or other factors.

As used herein, the term "partially" may refer to a portion in any proportion. For example, it may be greater than 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or even 100%, that is, all.

In addition, "first", "second", and similar terms may also be used herein for reference purposes only, and thus are not intended to be limiting. For example, the words "first," "second," and other such numerical terms referring to structures or elements do not imply a sequence or order unless clearly indicated by the context.

Here, it should be noted that the base station antennas in FIG. 1 to FIG. 10 are mainly different in the reflector of the passive module. Therefore, in order not to obscure the focus of the present disclosure and to facilitate readers’ understanding, in FIG. 1 to FIG. 10 The same reference numerals are used for the same parts. In addition, for convenience of description, it is appropriate to also describe embodiments of base station antennas according to the present disclosure with reference to FIGS. 1 to 3 hereinafter.

Fig. 4 shows a partial schematic perspective view of a passive module of a base station antenna according to some embodiments of the present disclosure. Fig. 5 shows a partial schematic front view of the base station antenna of Fig. 4, showing the reflector strip section of the reflector in the passive module together with the reflector and the array of radiating elements in the active module at the rear; Fig. 6 shows Shown are partial schematic front views of base station antennas showing reflective strip segments of reflectors within passive modules together with reflector and radiating element arrays within active modules at the rear, according to further embodiments of the disclosure.

The base station antenna 10 according to the present disclosure may include a passive module 11 and an active module 12 installed behind the passive module 11 (not shown in FIG. 4 , please refer to FIGS. 1 and 2 ).

The passive module 11 may include a front cover 111, a rear cover 112, a reflector 13 between the front cover 111 and the rear cover 112, and a radiation element 115 in front of the reflector 13 (not shown in FIG. One or more arrays (these arrays are usually mounted on a feeder plate in front of the reflector) (cf. Fig. 2). These arrays are mounted to extend forward from the reflector 13 of the passive module 11, and these arrays may include arrays operating under second generation (2G), third generation (3G) or fourth generation (4G) cellular network standards . The front cover 111 and the rear cover 112 of the passive module 11 may form an integrated radome, or the front cover 111 and the rear cover 112 may be formed as separate radome components.

Referring adaptively to FIG. 2 , the active module 12 may be mounted behind the passive module 11 and may include its own reflector 121 and one or more arrays of radiating elements 122 on said reflector 121 . These arrays are mounted to extend forwardly from said reflector 121 of the active module 12, and these arrays may include arrays operating under fifth generation or higher generation (5G or 6G) cellular network standards. In the fifth-generation mobile communication, the frequency range of communication includes the main frequency band (a specific part of the range from 450MHz to 6GHz) and the extended frequency band (24GHz to 73GHz, that is, the millimeter wave frequency band, mainly 28GHz, 39GHz, 60GHz and 73GHz) .

Adaptively referring to FIGS. 2 to 3 , in order not to block the high-frequency electromagnetic waves emitted by the active module 12 , an opening 14 is usually provided in the reflector 13 of the passive module 11 . The active module 12 can be installed at a position corresponding to the opening 14 , so that the high-frequency electromagnetic waves emitted by the active module 12 can pass through the opening 14 . Beside the opening 14 in the horizontal direction x, the body 131 of the reflector 13 may include a first reflective strip section 1311 and a second reflective strip section 1312 extending in the vertical direction y. The first reflective strip section 1311 and the second reflective strip section 1312 may be disposed outside the corresponding range of the active module 12 and configured to install the radiation element 115 .

In order to reflect electromagnetic waves in a predetermined frequency band, for example signals radiated back by the radiation element 115 mounted on the reflective strip sections 1311 , 1312 , a separate reflection compensation plate 16 can be arranged in the passive module 11 . The reflection compensating plate 16 may be mounted behind the reflective strip sections 1311 , 1312 and partially or completely overlap the opening 14 formed in the body 131 of the reflector 13 in projection in the forward direction z. As a result, the reflection compensating plate 16 can at least partially compensate for the negative influence of the reflection performance caused by the opening 14 provided in the reflector 13 .

In some embodiments, the reflection compensation plate 16 may be installed before the rear cover of the passive module 11 . In some embodiments, the reflection compensation plate 16 may constitute at least a part of the back cover of the passive module. In order to avoid the negative impact of the reflection compensating plate 16 on the active module 12 mounted on the rear cover 112 of the passive module 11, the reflection compensating plate 16 may include, for example, a structure composed of a first direction and a second direction (for example, the vertical direction y and the horizontal direction y). A frequency selective surface composed of a plurality of pattern units 161 periodically arranged in the direction x), the frequency selective surface can be configured to allow electromagnetic waves within a predetermined frequency band, such as electromagnetic waves emitted by the active module 12, to pass through, while reflecting Electromagnetic waves emitted by the source module 11. In some embodiments, the plurality of pattern units 161 may be metal pattern units constructed on a metal plate or a PCB substrate. The resonant frequency of the reflection compensation plate 16 can be configured by selecting or designing the style and size of each pattern unit 161, the spacing and arrangement of a plurality of pattern units 161, so that electromagnetic waves in a predetermined frequency band can be compensated by reflection. plate 16.

As mentioned at the beginning of this article, since the reflector 13 of the passive module 11 is arranged before the active module 12, when the electromagnetic wave from the active module 12 radiates to the reflector 13 of the passive module 11, on the reflector 13 Inductive currents may be formed or induced. The induced current may be, for example, the induced current within the working frequency band of the radiating element 122 of the active module 12 . Such induced current may have adverse effects on the radiation performance of the base station antenna 10 , for example, causing distortion of the radiation pattern of the active module 12 . This is an undesired effect.

In order to suppress the induction current formed on the reflector 13 so as to avoid the above-mentioned potential adverse effects, the present disclosure proposes a new reflector 13 for the base station antenna 10 . Referring to FIGS. 4 and 5 , at least one through groove 132 is provided in the body 131 of the reflector 13 according to the present disclosure, and the at least one through groove 132 is configured to form at least one stub type in the body 131 A filter structure, the stub-type filter structure is configured to at least partially suppress induced current within a predetermined frequency band in the body 131 . In the present disclosure, a "through slot" may be understood as a metal-free hollowed-out portion on the body.

By introducing specific through-slots 132 in the body 131 of the reflector 13 to form stub-type filter structures (such as open stubs 133, 134 or short-circuit stubs 135), it is possible to suppress in a targeted manner in the body 131 The induced current is within a predetermined frequency band, so as to effectively reduce or eliminate the adverse effect of the induced current on the radiation performance of the base station antenna 10 . It should be understood that the through groove 132 of the present disclosure can be arranged at any position of the reflector 13 as long as the induced current needs to be suppressed at the corresponding position of the reflector 13 .

Specifically, referring to FIG. 4 and FIG. 5 , in the region where the induced current needs to be suppressed in the body 131 of the reflector 13 , for example, in the reflective strip sections 1311 and 1312 close to the active module 12 , at least one The through groove 132 is used to form at least one stub filter structure in the region. The at least one stub-type filtering structure may comprise at least one open stub 133 , 134 . For this, as shown in FIG. 5 , the through groove 132 may be provided in an H-shape. Thus, by providing an H-shaped through-slot 132 , two opposite open-circuit stubs 133 , 134 can be formed. However, it is conceivable that the through groove 132 may also be set in other suitable shapes according to actual needs, for example, be set in a U-shape as shown in FIG. 6 . In addition, in some unshown embodiments, the through groove 132 may also be configured in an L-shape, M-shape, S-shape or sector shape.

In some embodiments, the longitudinal length L1 of the open stubs 133, 134 may be set to 0.25+n/2 times the equivalent wavelength, where n is a natural number, wherein the equivalent wavelength is in the predetermined frequency band The wavelength corresponding to the predetermined frequency point. Here, “the longitudinal length L1 of the open stub 133 , 134 ” can be understood as the length from the free end of the open stub 133 , 134 to its root (please refer to FIG. 5 for the longitudinal length L1 ). The predetermined frequency band may be an operating frequency band of at least a part of the radiating elements 122 in the active module 12 , and the predetermined frequency point may be a center frequency point of the predetermined frequency band. Normally, n can be selected as 0 in order to reduce the longitudinal length L1 of the open-circuit stubs 133 and 134 . That is, the longitudinal length L1 of the open stubs 133, 134 may be configured to be 0.25 times the equivalent wavelength.

In some embodiments, the stub-type filtering structure formed in the body 131 of the reflector 13 may include: a first stub-type filtering structure configured for at least partially suppressing a first induced current within a predetermined first frequency band; and a second stub-type filtering structure configured to at least partially suppress a first induced current within a predetermined second frequency band; A second induced current within a frequency band; wherein the first frequency band is different from the second frequency band. As a result, induced currents in a different (ie wider) predetermined frequency band can be suppressed in the body 131 of the reflector 13 . Here, the first stub-type filter structure and the second stub-type filter structure can be correspondingly configured as first open-circuit stubs with different longitudinal lengths L1, L1' as shown in FIG. Line 133 and a second open stub 134. Alternatively, the first stub-type filter structure and the second stub-type filter structure may also be configured as short-circuit stubs 135 having different longitudinal lengths L2 (the short-circuit stub 135 will be described below described in more detail herein with the aid of Figure 10). In some not-shown embodiments, one stub-type filter structure among the first stub-type filter structure and the second stub-type filter structure may be configured as an open-circuit stub 133 , 134 , and another stub-type filter structure among them may be configured as a short-circuit stub 135 .

Fig. 7 shows a partial front view of the reflector 13 of the base station antenna 10 according to other embodiments of the present disclosure. As shown in FIG. 7, suitably, the through groove 132 can be arranged at any position of the reflector 13 where the induced current needs to be suppressed, and can be arranged in any suitable shape, orientation and/or size to meet the specific induced current suppression. Require. That is to say, the through grooves 132 in the reflector 13 may be arranged aperiodically along at least one direction (eg, the vertical direction y or the horizontal direction x of the reflector 13 ). Correspondingly, the stub-type filtering structure formed by the through groove 132 may include a plurality of stub-type filtering structures arranged non-periodically along at least one direction (for example, the vertical direction y or the horizontal direction x of the reflector 13). filtering structure. Here, at least two stub-type filter structures of the plurality of stub-type filter structures may have different orientations, dimensions (eg longitudinal length) and/or shapes. For example, the two stub-type filtering structures configured as open-circuit stubs 133-1, 133-2 in FIG. 7 have different orientations. Although the plurality of stub-type filter structures in FIG. 7 are all open-circuit stubs 133, it is conceivable that the plurality of stub-type filter structures may include at least one open-circuit stub 133, 134 and at least one shorting stub 135 , or may include only the shorting stub 135 .

Fig. 8 shows a front view of a stub filter structure in the reflector 13 of the base station antenna 10 according to other embodiments of the present disclosure. As shown in FIG. 8 , the through slots 132 in the body 131 of the reflector 13 (indicated by oblique lines in FIG. 8 ) may be configured to form at least one multi-order stub-type filtering structure. In some embodiments, the slot 132 in the body 131 of the reflector 13 may have a bent profile to form a multi-stage stub filter structure. The multi-order stub filter structure can be understood as a combination of multiple single-order stub filter structures 133 - 3 , 133 - 4 , and 133 - 5 . In the embodiment of FIG. 8 , no through slot 132 is provided between the plurality of single-stage stub filter structures 133 - 3 , 133 - 4 , 133 - 5 . However, it is conceivable that through slots 132 may also be provided between the plurality of single-stage stub-type filter structures 133 - 3 , 133 - 4 , 133 - 5 . Compared with the single-order stub filter structure, the multi-stage stub filter structure can have a smoother filter window, or can achieve a smaller fluctuation range within the filter passband.

Fig. 9 shows a partial side view of the reflector 13 of the base station antenna 10 according to other embodiments of the present disclosure, the reflector 13 comprising a barrier 136 extending along the vertical direction y. The barrier 136 extends forward from the body 131 of the reflector 13 . At least one further through-slot 137 , which is configured for forming at least one further stub-type filter structure in the spacer 136 , may be provided in the spacer 136 . The further stub-type filter structure is configured to at least partially suppress induced currents in a predetermined frequency band in the barrier 136 . The arrangement embodiment of the other stub-type filter structure formed in the barrier 136 may be similar to the arrangement embodiment of the stub-type filter structure formed in the body 131 , which will not be repeated here.

Fig. 10 shows a partial front view of the reflector 13 of the base station antenna 10 according to other embodiments of the present disclosure. As shown in FIG. 10 , the stub type filtering structure formed in the body 131 may include at least one shorting stub 135 . The longitudinal length L2 of the short-circuit stub 135 may be set to be N/2 times the equivalent wavelength, where N is a positive integer, wherein the equivalent wavelength is the wavelength corresponding to a predetermined frequency point in the predetermined frequency band. Here, the "longitudinal length L2 of the short-circuit stub 135" can be understood as the length between the two roots of the short-circuit stub 135 (please refer to FIG. 10 for the longitudinal length L2). The predetermined frequency band may be an operating frequency band of another radiating element 122 in the active module 12, and the predetermined frequency point may be a center frequency point of the predetermined frequency band. Usually, in order to reduce the longitudinal length L2 of the short-circuit stub 135 , N can be selected as 1. That is, the longitudinal length L2 of the at least one short-circuit stub 135 may be configured to be 0.5 times the equivalent wavelength.

In order to form a single short-circuit stub 135, two through grooves 132-1, 132-2 may be provided on the body 131 of the reflector 13, and the single short-circuit stub 135 is formed in the two through grooves 132- 1, 132-2. The two through-slots 132 - 1 , 132 - 2 may be arranged to include at least elongated through-slot 132 sections extending parallel to each other for forming a single shorting stub 135 . As shown in FIG. 10 , the two through grooves 132 - 1 , 132 - 2 can be configured as elongated through grooves.

In the above, only the reflector 13 arranged in the passive module 11 of the base station antenna 10 is used as an example to illustrate the technical concept of the reflector 13 and the base station antenna 10 of the present disclosure, however, these It should not be understood as a limitation to the present disclosure, and the reflector 13 according to various embodiments of the present disclosure may also be suitably applied to other types of base station antennas 10 according to actual needs.

Although the exemplary embodiments of the present disclosure have been described, it will be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present disclosure without substantially departing from the spirit and scope of the present disclosure. Accordingly, all variations and modifications are included within the scope of this disclosure.

Claims (32)

1. A reflector for a base station antenna, the reflector comprising:

a body; and

at least one channel disposed in the body, the at least one channel configured for forming at least one stub-type filtering structure in the body, the stub-type filtering structure configured for at least partially suppressing induced current in the body within an operating frequency band of a radiating element mounted behind the reflector.

2. The reflector for a base station antenna of claim 1, wherein the at least one stub-type filtering structure comprises at least one open stub.

3. The reflector for a base station antenna of claim 2, wherein the longitudinal length of the at least one open stub is 0.25+ n/2 times an equivalent wavelength, n being a natural number, wherein the equivalent wavelength is a wavelength corresponding to a predetermined frequency point in the operating band.

4. The reflector for a base station antenna of claim 3, wherein a longitudinal length of the at least one open stub is configured to be 0.25 times the equivalent wavelength.

5. A reflector for a base station antenna according to claim 3, characterized in that said predetermined frequency point is a center frequency point of said operating frequency band.

6. The reflector for a base station antenna of claim 2, wherein the at least one through slot comprises an H-shaped, L-shaped, M-shaped, U-shaped, S-shaped, or fan-shaped through slot for forming the at least one open stub.

7. The reflector for a base station antenna of claim 1, wherein the at least one stub-type filtering structure includes at least one short stub.

8. The reflector for a base station antenna of claim 7, wherein the longitudinal length of the at least one short stub is N/2 times an equivalent wavelength, N being a positive integer, wherein the equivalent wavelength is a wavelength corresponding to a predetermined frequency point in the operating frequency band.

9. The reflector for a base station antenna of claim 8, wherein a longitudinal length of the at least one short stub is configured to be 0.5 times the equivalent wavelength.

10. The reflector for a base station antenna of claim 8, wherein the predetermined frequency point is a center frequency point of the operating frequency band.

11. The reflector for a base station antenna of claim 7, wherein the at least one through slot includes two through slots for forming a single short stub, the single short stub being formed between the two through slots.

12. The reflector for a base station antenna of claim 1, wherein the through-slot is configured as a metal-free cutout on the body.

13. The reflector for a base station antenna of claim 1, wherein the at least one stub-type filter structure comprises a plurality of stub-type filter structures non-periodically arranged along at least one direction.

14. The reflector for a base station antenna of claim 13, wherein the at least one direction comprises a vertical direction and/or a horizontal direction of the reflector.

15. The reflector for a base station antenna of claim 13, wherein the plurality of stub-type filtering structures comprises at least one open stub and at least one short stub.

16. The reflector for a base station antenna of claim 13, wherein at least two of the plurality of stub-type filtering structures have different orientations, sizes and/or shapes.

17. The reflector for a base station antenna of claim 1, wherein the at least one stub-type filtering structure comprises:

a first stub-type filtering structure configured to at least partially suppress a first induced current within a predetermined first frequency band; and

a second stub-type filtering structure configured to at least partially suppress a second induced current within a predetermined second frequency band;

wherein the first frequency band is the operating frequency band and the first frequency band is different from the second frequency band.

18. The reflector for a base station antenna of claim 17, wherein the first stub-type filtering structure and the second stub-type filtering structure are open stubs having different longitudinal lengths, or are short stubs having different longitudinal lengths.

19. The reflector of claim 17, wherein one of the first and second stub-type filtering structures is an open stub and the other stub-type filtering structure is a short stub.

20. The reflector for a base station antenna of claim 1, wherein the at least one stub-type filter structure comprises a multi-order stub-type filter structure.

21. The reflector for a base station antenna of claim 1, wherein the body includes a reflective strip section extending in a vertical direction, the reflective strip section configured for mounting a radiating element, the at least one through slot being at least partially disposed on the reflective strip section for forming at least one of the stub-type filtering structures on the reflective strip section.

22. The reflector for a base station antenna of claim 21, wherein the body includes first and second reflector segments laterally of the horizontal direction with an opening disposed therebetween.

23. The reflector for a base station antenna of claim 1, comprising a partition extending in a vertical direction, the partition extending forward from a body of the reflector.

24. A reflector for a base station antenna according to claim 23, characterized in that at least one further through slot is provided on the partition, said at least one further through slot being configured for forming at least one further truncated filtering structure in the partition, said at least one further truncated filtering structure being configured for at least partially suppressing induced currents in the partition within an operating frequency band.

25. A base station antenna, characterized in that it comprises a reflector for a base station antenna according to any one of claims 1 to 24.

26. The base station antenna according to claim 25, wherein the base station antenna comprises a passive module in which the reflector and a reflection compensation plate separated from the reflector are installed and an active module installed at the rear of the passive module, the reflection compensation plate comprising a frequency selective surface composed of a plurality of pattern units arranged periodically.

27. The base station antenna of claim 26, wherein the frequency selective surface is configured to reflect electromagnetic waves in a second frequency band corresponding to an operating frequency band of at least a portion of the radiating elements within the passive module, and to allow electromagnetic waves in the first frequency band to pass through.

28. The base station antenna according to claim 26, wherein the reflector comprises a first reflector strip section and a second reflector strip section for mounting the radiating element, an opening being provided between the first reflector strip section and the second reflector strip section, wherein the reflective compensation plate is mounted behind the reflector and at least partially overlaps the opening in a projection in the forward direction.

29. The base station antenna of claim 28, wherein the reflective compensation plate is mounted in front of or formed as at least a part of a rear housing of the passive module.

30. The base station antenna according to claim 26, wherein the plurality of pattern elements are metal pattern elements configured on a metal plate or a printed circuit board.

31. The base station antenna of claim 26, wherein the passive module comprises a 4G module.

32. The base station antenna of claim 26, wherein the active module comprises a 5G module.

Images