CN104836028A - Antenna matching circuit control method and control device, and terminal - Google Patents

Abstract

The present invention proposes a control method for an antenna matching circuit, a control device for an antenna matching circuit, and a terminal, wherein the method includes: when the placement state and/or service quality of the terminal change, the antenna of the terminal is currently The antenna matching circuit used is switched from the current antenna matching circuit to the target antenna matching circuit to adjust the antenna pattern of the terminal; after adjusting the antenna pattern of the terminal, obtain the current signal quality and/or current signal strength of the terminal; determine the current Whether the signal quality and/or the current signal strength has been improved, if the judgment result is yes, the control antenna continues to use the target antenna matching circuit. Through the technical solution of the present invention, when the placement state and/or service quality of the terminal change, the antenna pattern can be adjusted freely, so that the antenna pattern always points to the base station or satellite, thereby flexibly adjusting the radiation direction, so that the terminal always maintain a high signal-to-noise ratio.

Description

Control method, control device and terminal of antenna matching circuit

technical field

The present invention relates to the technical field of terminals, in particular, to a method for controlling an antenna matching circuit, a control device for an antenna matching circuit, and a terminal.

Background technique

At present, as mobile terminal users have higher and higher requirements for terminal appearance, more and more mobile terminals with metal appearance appear on the market, and users have higher requirements for the antenna performance of such terminals, so , being able to flexibly adjust the antenna pattern will bring users a better experience in many cases. For example, for GPS antennas, users always hope that their GPS antenna pattern points upward as much as possible in different situations. That is, the direction of the satellite, and when making a call, the user always hopes that the antenna pattern of the base station communication antenna (such as: GSM, CDMA, WCDMA, LTE, etc. antenna) points to the direction of the base station as much as possible, so as to obtain a high signal-to-noise ratio , but limited by the size of the mobile terminal, the current method of adjusting the antenna pattern through the antenna array is not suitable for the mobile terminal.

Therefore, how to make the terminal freely adjust the antenna pattern when the placement state and/or service quality changes, so that the antenna pattern always points to the base station or satellite, so as to flexibly adjust the radiation direction, so that the terminal always maintains a high signal The noise ratio has become an urgent problem to be solved.

Contents of the invention

Based on the above problems, the present invention proposes a new technical solution, which can freely adjust the antenna pattern when the terminal is placed and/or the quality of service changes, so that the antenna pattern always points to the base station or satellite. Therefore, the radiation direction can be adjusted flexibly, so that the terminal can always maintain a high signal-to-noise ratio.

In view of this, an aspect of the present invention proposes a method for controlling an antenna matching circuit, including: when the placement state of the terminal and/or the service quality change, the antenna matching circuit currently used by the antenna of the terminal is changed from The current antenna matching circuit is switched to the target antenna matching circuit to adjust the antenna pattern of the terminal; after adjusting the antenna pattern of the terminal, obtain the current signal quality and/or current signal strength of the terminal; determine the Whether the current signal quality and/or the current signal strength has been improved, if the judgment result is yes, control the antenna to continue using the target antenna matching circuit; otherwise, control the antenna to reuse the current antenna matching circuit.

In this technical solution, when the placement state of the terminal and/or the quality of service change (for example, the placement state of the terminal changes from a horizontal state to a vertical state or the quality of the call decreases), the antenna currently used by the antenna of the terminal can be changed to The matching circuit is switched from the current antenna matching circuit to the target antenna matching circuit, thereby adjusting the antenna pattern of the antenna, and after adjusting the antenna pattern, it is judged whether the current signal quality and/or current signal strength of the terminal is improved, and if it is improved , indicating that the signal-to-noise ratio of the terminal has been improved, further indicating that the adjustment of the pattern is more effective, so that the antenna pattern further points to the base station or satellite, the antenna should be controlled to continue to use the target antenna matching circuit after switching; otherwise, it means After adjusting the antenna pattern this time, the adjusted antenna pattern further deviates from the base station or satellite, and the signal-to-noise ratio of the terminal is also reduced, so the antenna should be controlled to reuse the current antenna matching circuit before switching, so as to realize the When the terminal's placement status and/or service quality change, it can freely adjust the antenna pattern so that the antenna pattern always points to the base station or satellite, thereby flexibly adjusting the radiation direction, so that the terminal always maintains a high signal-to-noise ratio.

In the above technical solution, preferably, when the judgment result is yes, the adjusted antenna pattern points to a device with a base station function in the serving cell where the terminal is located or a satellite that provides business services for the terminal.

In this technical solution, if the current signal quality and/or current signal strength of the terminal is improved after the antenna pattern is adjusted, it means that the signal-to-noise ratio of the terminal has been improved, which further shows that this adjustment of the pattern is more effective, so that the antenna The direction diagram points to the equipment or satellite with base station function; of course, whether the antenna pattern points to the equipment with base station function or to the satellite depends on the type of antenna, and the equipment with base station function includes base station, through communication equipment (such as Smart phones, etc.) to achieve micro-cell base stations, etc.

In the above technical solution, preferably, the antenna is provided with a detachable antenna grounding switch, and the antenna grounding switch is provided at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame of the terminal, and The switching the antenna matching circuit currently used by the antenna of the terminal from the current antenna matching circuit to the target antenna matching circuit specifically includes: switching the antenna grounding switch from the on state to the off state or from the off state to the off state. Switching the state to the on state controls the antenna matching circuit to switch from the current antenna matching circuit to the target antenna matching circuit.

In this technical solution, by setting the antenna grounding switch at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame of the terminal, it is possible to control the antenna grounding switch when the terminal's placement status and/or service quality change. The conduction state of the antenna changes, which can control the environment around the antenna, such as impedance changes, and then control the local current distribution of the antenna to change, so as to accurately control the switching of the antenna matching circuit from the current antenna matching circuit to the target antenna matching circuit, and the specific The switching process is: if the antenna uses the current antenna matching circuit, the antenna grounding switch is in the on state, then when the antenna’s antenna matching circuit is switched to the target antenna matching circuit, the antenna grounding switch is in the off state; or if the antenna uses the current antenna When matching the circuit, the antenna grounding switch is in the off state, then when the antenna matching circuit of the antenna is switched to the target antenna matching circuit, the antenna grounding switch is in the on state, which can be freely set according to the actual situation.

In the above technical solution, preferably, it further includes: when the antenna grounding switch is switched from the on state to the off state, the metal structure is changed from the grounding state to the suspended state; and when the antenna grounding switch is switched from When the off state is switched to the on state, the metal structure changes from a suspended state to a grounded state.

In this technical solution, since the antenna grounding switch is arranged at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame, if the antenna grounding switch is switched from the on state to the off state, the metal structure will be grounded. The state becomes suspended state, and when the antenna grounding switch is switched from the off state to the on state, the metal structure will naturally change from the suspended state to the ground state, so that the antenna matching circuit of the antenna is switched from the current antenna matching circuit to the target Antenna matching circuit.

In the above technical solution, preferably, the current antenna matching circuit and the target antenna matching circuit are set in the antenna tuning module of the terminal, and the antenna tuning module includes two single-pole double-throw switches, and the The two single-pole double-throw switches are used to select the current antenna matching circuit or the target antenna matching circuit according to the on-off state of the antenna grounding switch.

In this technical solution, when selecting the current antenna matching circuit or the target antenna matching circuit, it includes but is not limited to using two single-pole double-throw switches in the antenna tuning module to select the current antenna matching circuit or the target antenna according to the on-off state of the antenna grounding switch. The antenna matching circuit can be any manner that can freely switch the antenna matching circuit according to the change of the placement state and/or service quality of the antenna.

Another aspect of the present invention provides a control device for an antenna matching circuit, including: a switching unit, when the placement state of the terminal and/or the quality of service change, switch the antenna matching circuit currently used by the antenna of the terminal to the The current antenna matching circuit is switched to the target antenna matching circuit to adjust the antenna pattern of the terminal; the acquiring unit acquires the current signal quality and/or current signal strength of the terminal after adjusting the antenna pattern of the terminal; a judging unit, judging whether the current signal quality and/or the current signal strength has been improved; a control unit, when the judging result is yes, controlling the antenna to continue using the target antenna matching circuit; otherwise, controlling the antenna The current antenna matching circuit is reused.

In this technical solution, when the placement state of the terminal and/or the quality of service change (for example, the placement state of the terminal changes from a horizontal state to a vertical state or the quality of the call decreases), the antenna currently used by the antenna of the terminal can be changed to The matching circuit is switched from the current antenna matching circuit to the target antenna matching circuit, thereby adjusting the antenna pattern of the antenna, and after adjusting the antenna pattern, it is judged whether the current signal quality and/or current signal strength of the terminal is improved, and if it is improved , indicating that the signal-to-noise ratio of the terminal has been improved, further indicating that the adjustment of the pattern is more effective, so that the antenna pattern further points to the base station or satellite, the antenna should be controlled to continue to use the target antenna matching circuit after switching; otherwise, it means After adjusting the antenna pattern this time, the adjusted antenna pattern further deviates from the base station or satellite, and the signal-to-noise ratio of the terminal is also reduced, so the antenna should be controlled to reuse the current antenna matching circuit before switching, so as to realize the When the terminal's placement status and/or service quality change, it can freely adjust the antenna pattern so that the antenna pattern always points to the base station or satellite, thereby flexibly adjusting the radiation direction, so that the terminal always maintains a high signal-to-noise ratio.

In the above technical solution, preferably, the pointing unit, when the judgment result is yes, the adjusted antenna pattern points to a device with a base station function in the serving cell where the terminal is located or provides business services for the terminal satellite.

In this technical solution, if the current signal quality and/or current signal strength of the terminal is improved after the antenna pattern is adjusted, it means that the signal-to-noise ratio of the terminal has been improved, which further shows that this adjustment of the pattern is more effective, so that the antenna The direction diagram points to the equipment or satellite with base station function; of course, whether the antenna pattern points to the equipment with base station function or to the satellite depends on the type of antenna, and the equipment with base station function includes base station, through communication equipment (such as Smart phones, etc.) to achieve micro-cell base stations, etc.

In the above technical solution, preferably, the antenna is provided with a detachable antenna grounding switch, and the antenna grounding switch is provided at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame of the terminal, and The switching unit is specifically configured to: control the antenna matching circuit to switch from the current antenna matching circuit to The target antenna matching circuit.

In this technical solution, by setting the antenna grounding switch at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame of the terminal, it is possible to control the antenna grounding switch when the terminal's placement status and/or service quality change. The conduction state of the antenna changes, which can control the environment around the antenna, such as impedance changes, and then control the local current distribution of the antenna to change, so as to accurately control the switching of the antenna matching circuit from the current antenna matching circuit to the target antenna matching circuit, and the specific The switching process is: if the antenna uses the current antenna matching circuit, the antenna grounding switch is in the on state, then when the antenna’s antenna matching circuit is switched to the target antenna matching circuit, the antenna grounding switch is in the off state; or if the antenna uses the current antenna When matching the circuit, the antenna grounding switch is in the off state, then when the antenna matching circuit of the antenna is switched to the target antenna matching circuit, the antenna grounding switch is in the on state, which can be freely set according to the actual situation.

In the above technical solution, preferably, it further includes: when the antenna grounding switch is switched from the on state to the off state, the metal structure is changed from the grounding state to the suspended state; and when the antenna grounding switch is switched from When the off state is switched to the on state, the metal structure changes from a suspended state to a grounded state.

In this technical solution, since the antenna grounding switch is arranged at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame, if the antenna grounding switch is switched from the on state to the off state, the metal structure will be grounded. The state becomes suspended state, and when the antenna grounding switch is switched from the off state to the on state, the metal structure will naturally change from the suspended state to the ground state, so that the antenna matching circuit of the antenna is switched from the current antenna matching circuit to the target Antenna matching circuit.

In the above technical solution, preferably, the current antenna matching circuit and the target antenna matching circuit are set in the antenna tuning module of the terminal, and the antenna tuning module includes two single-pole double-throw switches, and the The two single-pole double-throw switches are used to select the current antenna matching circuit or the target antenna matching circuit according to the on-off state of the antenna grounding switch.

In this technical solution, when selecting the current antenna matching circuit or the target antenna matching circuit, it includes but is not limited to using two single-pole double-throw switches in the antenna tuning module to select the current antenna matching circuit or the target antenna according to the on-off state of the antenna grounding switch. The antenna matching circuit can be any manner that can freely switch the antenna matching circuit according to the change of the placement state and/or service quality of the antenna.

Another aspect of the present invention provides a terminal, including: the device for controlling an antenna matching circuit according to any one of the above technical solutions.

In this technical solution, by setting the control device of the antenna matching circuit on the terminal, it is possible to freely adjust the antenna pattern when the terminal is placed and/or the service quality changes, so that the antenna pattern always points to the base station or satellite , so as to flexibly adjust the radiation direction, so that the terminal always maintains a high signal-to-noise ratio.

Through the technical solution of the present invention, when the placement state and/or service quality of the terminal change, the antenna pattern can be adjusted freely, so that the antenna pattern always points to the base station or satellite, thereby flexibly adjusting the radiation direction, so that the terminal always maintain a high signal-to-noise ratio.

Description of drawings

FIG. 1 shows a schematic flowchart of a method for controlling an antenna matching circuit according to an embodiment of the present invention;

FIG. 2 shows a schematic structural diagram of a control device for an antenna matching circuit according to an embodiment of the present invention;

FIG. 3 shows a schematic structural diagram of a terminal according to an embodiment of the present invention;

FIG. 4 shows a schematic structural diagram of an antenna system of a terminal according to an embodiment of the present invention;

Fig. 5 shows a schematic circuit diagram in the antenna tuning module in Fig. 4;

Fig. 6 shows a schematic diagram of the reflection coefficient between the terminal and the satellite and/or base station after the antenna tuning module in Fig. 5 selects the MA antenna matching circuit;

FIG. 7 shows a schematic diagram of the antenna pattern used by the antenna after the antenna tuning module in FIG. 5 selects the MA antenna matching circuit;

Figure 8 shows a screenshot of the XOZ plane of the antenna pattern in Figure 7;

Figure 9 shows a screenshot of the XOY plane of the antenna pattern in Figure 7;

FIG. 10 shows a schematic diagram of the reflection coefficient between the terminal and the satellite and/or the base station after the antenna tuning module in FIG. 5 selects the MB antenna matching circuit;

FIG. 11 shows a schematic diagram of the antenna pattern used by the antenna after the antenna tuning module in FIG. 5 selects the MB antenna matching circuit;

Figure 12 shows a screenshot of the XOZ plane of the antenna pattern in Figure 11;

Figure 13 shows a screenshot of the XOY plane of the antenna pattern in Figure 11;

FIG. 14 shows a schematic structural diagram of a terminal according to another embodiment of the present invention;

FIG. 15 shows a schematic structural diagram of a terminal according to yet another embodiment of the present invention;

Fig. 16 shows a schematic diagram of a simulation result of an antenna pattern according to an embodiment of the present invention.

Detailed ways

In order to have a clearer understanding of the above objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

Fig. 1 shows a schematic flowchart of a method for controlling an antenna matching circuit according to an embodiment of the present invention.

As shown in FIG. 1 , a control method of an antenna matching circuit according to an embodiment of the present invention is shown, including: step 102, when the placement state of the terminal and/or the quality of service change, set the current location of the antenna of the terminal to The antenna matching circuit used is switched from the current antenna matching circuit to the target antenna matching circuit to adjust the antenna pattern of the terminal; step 104, after adjusting the antenna pattern of the terminal, obtain the current signal quality and /or current signal strength; step 106, judging whether the current signal quality and/or the current signal strength is improved, and when the judging result is yes, controlling the antenna to continue using the target antenna matching circuit; otherwise, controlling The antenna reuses the current antenna matching circuit.

In this technical solution, when the placement state of the terminal and/or the quality of service change (for example, the placement state of the terminal changes from a horizontal state to a vertical state or the quality of the call decreases), the antenna currently used by the antenna of the terminal can be changed to The matching circuit is switched from the current antenna matching circuit to the target antenna matching circuit, thereby adjusting the antenna pattern of the antenna, and after adjusting the antenna pattern, it is judged whether the current signal quality and/or current signal strength of the terminal is improved, and if it is improved , indicating that the signal-to-noise ratio of the terminal has been improved, further indicating that the adjustment of the pattern is more effective, so that the antenna pattern further points to the base station or satellite, the antenna should be controlled to continue to use the target antenna matching circuit after switching; otherwise, it means After adjusting the antenna pattern this time, the adjusted antenna pattern further deviates from the base station or satellite, and the signal-to-noise ratio of the terminal is also reduced, so the antenna should be controlled to reuse the current antenna matching circuit before switching, so as to realize the When the terminal's placement status and/or service quality change, it can freely adjust the antenna pattern so that the antenna pattern always points to the base station or satellite, thereby flexibly adjusting the radiation direction, so that the terminal always maintains a high signal-to-noise ratio.

In the above technical solution, preferably, when the judgment result is yes, the adjusted antenna pattern points to a device with a base station function in the serving cell where the terminal is located or a satellite that provides business services for the terminal.

In this technical solution, if the current signal quality and/or current signal strength of the terminal is improved after the antenna pattern is adjusted, it means that the signal-to-noise ratio of the terminal has been improved, which further shows that this adjustment of the pattern is more effective, so that the antenna The direction diagram points to the equipment or satellite with base station function; of course, whether the antenna pattern points to the equipment with base station function or to the satellite depends on the type of antenna, and the equipment with base station function includes base station, through communication equipment (such as Smart phones, etc.) to achieve micro-cell base stations, etc.

In the above technical solution, preferably, the antenna is provided with a detachable antenna grounding switch, and the antenna grounding switch is provided at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame of the terminal, and The switching the antenna matching circuit currently used by the antenna of the terminal from the current antenna matching circuit to the target antenna matching circuit specifically includes: switching the antenna grounding switch from the on state to the off state or from the off state to the off state. Switching the state to the on state controls the antenna matching circuit to switch from the current antenna matching circuit to the target antenna matching circuit.

In this technical solution, by setting the antenna grounding switch at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame of the terminal, it is possible to control the antenna grounding switch when the terminal's placement status and/or service quality change. The conduction state of the antenna changes, which can control the environment around the antenna, such as impedance changes, and then control the local current distribution of the antenna to change, so as to accurately control the switching of the antenna matching circuit from the current antenna matching circuit to the target antenna matching circuit, and the specific The switching process is: if the antenna uses the current antenna matching circuit, the antenna grounding switch is in the on state, then when the antenna’s antenna matching circuit is switched to the target antenna matching circuit, the antenna grounding switch is in the off state; or if the antenna uses the current antenna When matching the circuit, the antenna grounding switch is in the off state, then when the antenna matching circuit of the antenna is switched to the target antenna matching circuit, the antenna grounding switch is in the on state, which can be freely set according to the actual situation.

In the above technical solution, preferably, it further includes: when the antenna grounding switch is switched from the on state to the off state, the metal structure is changed from the grounding state to the suspended state; and when the antenna grounding switch is switched from When the off state is switched to the on state, the metal structure changes from a suspended state to a grounded state.

In this technical solution, since the antenna grounding switch is arranged at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame, if the antenna grounding switch is switched from the on state to the off state, the metal structure will be grounded. The state becomes suspended state, and when the antenna grounding switch is switched from the off state to the on state, the metal structure will naturally change from the suspended state to the ground state, so that the antenna matching circuit of the antenna is switched from the current antenna matching circuit to the target Antenna matching circuit.

In the above technical solution, preferably, the current antenna matching circuit and the target antenna matching circuit are set in the antenna tuning module of the terminal, and the antenna tuning module includes two single-pole double-throw switches, and the The two single-pole double-throw switches are used to select the current antenna matching circuit or the target antenna matching circuit according to the on-off state of the antenna grounding switch.

In this technical solution, when selecting the current antenna matching circuit or the target antenna matching circuit, it includes but is not limited to using two single-pole double-throw switches in the antenna tuning module to select the current antenna matching circuit or the target antenna according to the on-off state of the antenna grounding switch. The antenna matching circuit can be any manner that can freely switch the antenna matching circuit according to the change of the placement state and/or service quality of the antenna.

Fig. 2 shows a schematic structural diagram of a control device for an antenna matching circuit according to an embodiment of the present invention.

As shown in FIG. 2 , a control device 200 of an antenna matching circuit according to an embodiment of the present invention is shown, including: a switching unit 202, which switches the antenna of the terminal to The currently used antenna matching circuit is switched from the current antenna matching circuit to the target antenna matching circuit to adjust the antenna pattern of the terminal; the acquiring unit 204 acquires the current antenna pattern of the terminal after adjusting the antenna pattern of the terminal signal quality and/or current signal strength; judging unit 206, judging whether the current signal quality and/or the current signal strength has been improved; control unit 208, when the judging result is yes, controlling the antenna to continue using the a target antenna matching circuit; otherwise, control the antenna to reuse the current antenna matching circuit.

In this technical solution, when the placement state of the terminal and/or the quality of service change (for example, the placement state of the terminal changes from a horizontal state to a vertical state or the quality of the call decreases), the antenna currently used by the antenna of the terminal can be changed to The matching circuit is switched from the current antenna matching circuit to the target antenna matching circuit, thereby adjusting the antenna pattern of the antenna, and after adjusting the antenna pattern, it is judged whether the current signal quality and/or current signal strength of the terminal is improved, and if it is improved , indicating that the signal-to-noise ratio of the terminal has been improved, further indicating that the adjustment of the pattern is more effective, so that the antenna pattern further points to the base station or satellite, the antenna should be controlled to continue to use the target antenna matching circuit after switching; otherwise, it means After adjusting the antenna pattern this time, the adjusted antenna pattern further deviates from the base station or satellite, and the signal-to-noise ratio of the terminal is also reduced, so the antenna should be controlled to reuse the current antenna matching circuit before switching, so as to realize the When the terminal's placement status and/or service quality change, it can freely adjust the antenna pattern so that the antenna pattern always points to the base station or satellite, thereby flexibly adjusting the radiation direction, so that the terminal always maintains a high signal-to-noise ratio.

In the above technical solution, preferably, the pointing unit 210, when the judgment result is yes, the adjusted antenna pattern points to a device with a base station function in the serving cell where the terminal is located or provides services for the terminal service satellite.

In this technical solution, if the current signal quality and/or current signal strength of the terminal is improved after the antenna pattern is adjusted, it means that the signal-to-noise ratio of the terminal has been improved, which further shows that this adjustment of the pattern is more effective, so that the antenna The direction diagram points to the equipment or satellite with base station function; of course, whether the antenna pattern points to the equipment with base station function or to the satellite depends on the type of antenna, and the equipment with base station function includes base station, through communication equipment (such as Smart phones, etc.) to achieve micro-cell base stations, etc.

In the above technical solution, preferably, the antenna is provided with a detachable antenna grounding switch, and the antenna grounding switch is provided at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame of the terminal, and The switching unit 202 is specifically configured to: control the antenna matching circuit to switch from the current antenna matching circuit by controlling the antenna grounding switch to switch from the on state to the off state or from the off state to the on state. matching circuit for the target antenna.

In this technical solution, by setting the antenna grounding switch at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame of the terminal, it is possible to control the antenna grounding switch when the terminal's placement status and/or service quality change. The conduction state of the antenna changes, which can control the environment around the antenna, such as impedance changes, and then control the local current distribution of the antenna to change, so as to accurately control the switching of the antenna matching circuit from the current antenna matching circuit to the target antenna matching circuit, and the specific The switching process is: if the antenna uses the current antenna matching circuit, the antenna grounding switch is in the on state, then when the antenna’s antenna matching circuit is switched to the target antenna matching circuit, the antenna grounding switch is in the off state; or if the antenna uses the current antenna When matching the circuit, the antenna grounding switch is in the off state, then when the antenna matching circuit of the antenna is switched to the target antenna matching circuit, the antenna grounding switch is in the on state, which can be freely set according to the actual situation.

In the above technical solution, preferably, it further includes: when the antenna grounding switch is switched from the on state to the off state, the metal structure is changed from the grounding state to the suspended state; and when the antenna grounding switch is switched from When the off state is switched to the on state, the metal structure changes from a suspended state to a grounded state.

In this technical solution, since the antenna grounding switch is arranged at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame, if the antenna grounding switch is switched from the on state to the off state, the metal structure will be grounded. The state becomes suspended state, and when the antenna grounding switch is switched from the off state to the on state, the metal structure will naturally change from the suspended state to the ground state, so that the antenna matching circuit of the antenna is switched from the current antenna matching circuit to the target Antenna matching circuit.

In the above technical solution, preferably, the current antenna matching circuit and the target antenna matching circuit are set in the antenna tuning module of the terminal, and the antenna tuning module includes two single-pole double-throw switches, and the The two single-pole double-throw switches are used to select the current antenna matching circuit or the target antenna matching circuit according to the on-off state of the antenna grounding switch.

In this technical solution, when selecting the current antenna matching circuit or the target antenna matching circuit, it includes but is not limited to using two single-pole double-throw switches in the antenna tuning module to select the current antenna matching circuit or the target antenna according to the on-off state of the antenna grounding switch. The antenna matching circuit can be any manner that can freely switch the antenna matching circuit according to the change of the placement state and/or service quality of the antenna.

Fig. 3 shows a schematic structural diagram of a terminal according to an embodiment of the present invention.

As shown in FIG. 3 , a terminal 300 according to an embodiment of the present invention includes: the apparatus 200 for controlling an antenna matching circuit according to any one of the above technical solutions.

In this technical solution, by setting the control device 200 of the antenna matching circuit on the terminal 300, the antenna pattern can be freely adjusted when the terminal 300 is placed and/or the service quality changes, so that the antenna pattern always points to Base stations or satellites, so as to flexibly adjust the radiation direction, so that the terminal always maintains a high signal-to-noise ratio.

Fig. 4 shows a schematic structural diagram of an antenna system of a terminal according to an embodiment of the present invention; Fig. 5 shows a schematic circuit diagram of the antenna tuning module in Fig. 4; Fig. 6 shows a schematic diagram of the antenna tuning module in Fig. 5 A schematic diagram of the reflection coefficient between the terminal and the satellite and/or base station after the MA antenna matching circuit is selected; Fig. 7 shows a screenshot of the antenna pattern used by the antenna after the antenna tuning module in Fig. 5 selects the MA antenna matching circuit; Fig. 8 shows a screenshot of the XOZ plane of the antenna pattern in Figure 7; Figure 9 shows a screenshot of the XOY plane of the antenna pattern in Figure 7; Figure 10 shows that the antenna tuning module in Figure 5 selects the MB antenna A schematic diagram of the reflection coefficient between the terminal and the satellite and/or base station after the matching circuit; Figure 11 shows a screenshot of the antenna pattern used by the antenna after the antenna tuning module in Figure 5 selects the MB antenna matching circuit; Figure 12 shows Figure 11 shows a screenshot of the XOZ plane of the antenna pattern in Figure 11; Figure 13 shows a screenshot of the XOY plane of the antenna pattern in Figure 11.

The technical scheme of the present invention will be described in detail below in conjunction with Fig. 4 to Fig. 13:

As shown in Figure 4, the antenna system of the present invention includes: LCD (LiquidCrystal Display, liquid crystal display) area of the shaded part, a metal middle frame, two symmetrical breakpoints on the metal middle frame, and a metal structure between the symmetrical breakpoints parts, a detachable antenna grounding switch at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame, multiple antenna clearance areas (which can be filled with non-conductive materials), antenna feed points (that is, antenna receiving signal port), the antenna tuning module is used for tuning the antenna port, and the terminal can be matched with a feed source (ie, a satellite or a base station) with an impedance of 50Ω after selecting different antenna matching circuits.

Among them, the antenna tuning module is composed of two SPDT switches (SPDT switch A and SPDT switch B) and two different antenna matching circuits (MA antenna matching circuit and MB antenna matching circuit) (as shown in Fig. 5), at the same time, there is a trigger signal to control two SPDT switches to select the antenna matching circuit, and the trigger signal is generated when the placement state of the terminal and/or the quality of service of the terminal changes.

The working principle of the antenna system shown in Figure 4 will be described in detail below:

State 1: When the antenna grounding switch shown in Figure 4 is in the on state, the metal structure in the middle of the symmetrical breakpoint is grounded, and the antenna is matched with the MA antenna matching circuit shown in Figure 5. At this time, the GPS of the terminal The reflection coefficient between the antenna and the base station and/or satellite is shown in Figure 6. The reflection coefficient is the reflectance of the signal reflected to the base station and/or satellite after the terminal receives the signal sent by the base station and/or satellite, so , the smaller the reflection coefficient, the better the match between the antenna port of the terminal and the network between the base station and/or satellite, and the higher the communication quality between the terminal and the base station and/or satellite; at the same time, after the antenna tuning module selects the MA antenna matching circuit The antenna pattern used by the antenna is shown in Figure 7, the screenshot of the XOZ plane of the antenna pattern in Figure 7 is shown in Figure 8, and the screenshot of the XOY plane of the antenna pattern in Figure 7 is shown in Figure 9;

State 2: When the antenna grounding switch is off, the metal structure in the middle of the symmetrical breakpoint is suspended, and the antenna is matched with the MB antenna matching circuit shown in Figure 5. At this time, the GPS antenna of the terminal is connected to the base station and/or The reflection coefficient between satellites is shown in Figure 10. The reflection coefficient is the reflection rate of the signal reflected to the base station and/or satellite after the terminal receives the signal sent by the base station and/or satellite. Therefore, the larger the reflection coefficient, the higher the reflection coefficient. Indicates that the more mismatch between the antenna port of the terminal and the network between the base station and/or satellite, the lower the communication quality between the terminal and the base station and/or satellite; at the same time, the antenna tuning module selects the antenna used by the antenna after the MB antenna matching circuit The pattern is shown in FIG. 11 , the screenshot of the XOZ plane of the antenna pattern in FIG. 11 is shown in FIG. 12 , and the screenshot of the XOY plane of the antenna pattern in FIG. 11 is shown in FIG. 13 .

Fig. 14 shows a schematic structural diagram of a terminal according to another embodiment of the present invention.

As shown in FIG. 14, a terminal 1400 according to another embodiment of the present invention is shown (in this embodiment, it is assumed that the antenna matching circuit currently used by the antenna of the terminal is the MA antenna matching circuit in FIG. 5, and the antenna system of the terminal Another antenna matching circuit in FIG. 5 is the MB antenna matching circuit in FIG. 5), including: placement state detection module 1402, antenna system 400 and signal strength detection module 1404, if the placement state of the placement state detection module 1402 to the terminal 1400 changes , a trigger signal will be sent to notify the antenna system 400 shown in Figure 4 to switch the antenna matching circuit, that is, to control the antenna grounding switch from the on state to the off state, so that the antenna matching circuit is switched from the MA antenna matching circuit to the MA antenna matching circuit MB antenna matching circuit, and then the signal strength detection module 1404 will detect whether the signal strength of the terminal has improved, if the signal strength has been improved, then continue to use the MB antenna matching circuit; if not improved, it will send a trigger signal to notify the antenna system again Switching from the MB antenna matching circuit to the MA antenna matching circuit, wherein the placement state of the terminal includes but not limited to: a horizontal screen placement state, a vertical screen placement state, and an upside down placement state.

Fig. 15 shows a schematic structural diagram of a terminal according to yet another embodiment of the present invention.

As shown in FIG. 15, a terminal 1500 according to another embodiment of the present invention is shown (in this embodiment, it is assumed that the antenna matching circuit currently used by the antenna of the terminal is the MB antenna matching circuit in FIG. 5, and the antenna system of the terminal Another antenna matching circuit in FIG. 5 is the MA antenna matching circuit in FIG. 5), including: business detection module 1502, antenna system 400, signal strength detection module 1504, if the wireless service quality (such as call quality, data throughput rate) changes, a trigger signal will be sent to notify the antenna system 400 shown in Figure 4 to switch the antenna matching circuit, that is, to control the antenna grounding switch from the off state to the on state, so that the antenna is matched The circuit is switched from the MB antenna matching circuit to the MA antenna matching circuit, and then the signal strength detection module 1504 will detect whether the signal strength of the terminal has improved, if the signal strength has been improved, continue to use the MA antenna matching circuit; if not, A trigger signal is sent to notify the antenna system to switch from the MA antenna matching circuit to the MB antenna matching circuit again.

Fig. 16 shows a screenshot of the simulation results of the antenna pattern according to one embodiment of the present invention.

Fig. 16 shows the simulation result of the antenna pattern of the GPS antenna of Daguanwu, as can be seen from Fig. 16, its antenna pattern is directed to the satellite and/or base station obliquely upwards, as can be seen, the present invention can be used without changing the metal In the case of a frame structure, by controlling the grounding or suspending of the metal structure in the middle of the symmetrical breakpoint in the metal frame, the direction diagram can be flexibly adjusted, so that no matter how the user places the mobile terminal or how the service quality of the terminal changes, it will not be affected by The antenna pattern of the antenna cannot always point to the satellite and/or base station causing severe signal loss.

The technical solution of the present invention has been described in detail above in conjunction with the accompanying drawings, which enables the terminal to freely adjust the antenna pattern when the placement state and/or service quality change, so that the antenna pattern always points to the base station or satellite, thereby flexibly adjusting Radiation direction, so that the terminal always maintains a high signal-to-noise ratio.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (11)

1. A method for controlling an antenna matching circuit, comprising: When the placement state and/or service quality of the terminal changes, switching the antenna matching circuit currently used by the antenna of the terminal from the current antenna matching circuit to the target antenna matching circuit, so as to adjust the antenna pattern of the terminal; After adjusting the antenna pattern of the terminal, acquiring the current signal quality and/or current signal strength of the terminal; judging whether the current signal quality and/or the current signal strength has been improved, and if the judging result is yes, controlling the antenna to continue using the target antenna matching circuit; otherwise, controlling the antenna to reuse the current antenna matching circuit. 2. the control method of antenna matching circuit according to claim 1, is characterized in that, When the judgment result is yes, the adjusted antenna pattern points to the equipment with base station function in the serving cell where the terminal is located or the satellite that provides business services for the terminal. 3. the control method of antenna matching circuit according to claim 1, is characterized in that, The antenna is provided with a detachable antenna grounding switch, and the antenna grounding switch is set at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame of the terminal, and The switching the antenna matching circuit currently used by the antenna of the terminal from the current antenna matching circuit to the target antenna matching circuit specifically includes: The antenna matching circuit is controlled to switch from the current antenna matching circuit to the target antenna matching circuit by controlling the antenna grounding switch to switch from an on state to an off state or from an off state to an on state. 4. The control method of the antenna matching circuit according to claim 3, further comprising: When the antenna grounding switch is switched from the on state to the off state, the metal structure is changed from the ground state to the suspended state; and When the antenna grounding switch is switched from an off state to an on state, the metal structure changes from a suspended state to a grounded state. 5. The control method of the antenna matching circuit according to any one of claims 1 to 4, characterized in that, The current antenna matching circuit and the target antenna matching circuit are set in the antenna tuning module of the terminal, and The antenna tuning module includes two single-pole double-throw switches, and the two single-pole double-throw switches are used to select the current antenna matching circuit or the target antenna matching circuit according to the on-off state of the antenna grounding switch. 6. A control device for an antenna matching circuit, comprising: The switching unit is configured to switch the antenna matching circuit currently used by the antenna of the terminal from the current antenna matching circuit to the target antenna matching circuit to adjust the antenna direction of the terminal when the placement state and/or service quality of the terminal changes picture; The obtaining unit is configured to obtain the current signal quality and/or current signal strength of the terminal after adjusting the antenna pattern of the terminal; a judging unit, judging whether the current signal quality and/or the current signal strength is improved; The control unit controls the antenna to continue using the target antenna matching circuit if the judgment result is yes; otherwise, controls the antenna to reuse the current antenna matching circuit. 7. The control device of the antenna matching circuit according to claim 6, characterized in that, A pointing unit, when the judgment result is yes, the adjusted antenna pattern points to a device with a base station function in the serving cell where the terminal is located or a satellite that provides business services for the terminal. 8. The control device of the antenna matching circuit according to claim 6, characterized in that, The antenna is provided with a detachable antenna grounding switch, and the antenna grounding switch is set at the lower end of the metal structure between the symmetrical breakpoints of the metal middle frame of the terminal, and The switching unit is specifically used for: The antenna matching circuit is controlled to switch from the current antenna matching circuit to the target antenna matching circuit by controlling the antenna grounding switch to switch from an on state to an off state or from an off state to an on state. 9. The control device of the antenna matching circuit according to claim 8, further comprising: When the antenna grounding switch is switched from the on state to the off state, the metal structure is changed from the ground state to the suspended state; and When the antenna grounding switch is switched from an off state to an on state, the metal structure changes from a suspended state to a grounded state. 10. The control device of the antenna matching circuit according to any one of claims 6 to 9, characterized in that, The current antenna matching circuit and the target antenna matching circuit are set in the antenna tuning module of the terminal, and The antenna tuning module includes two single-pole double-throw switches, and the two single-pole double-throw switches are used to select the current antenna matching circuit or the target antenna matching circuit according to the on-off state of the antenna grounding switch. 11. A terminal, characterized by comprising: the control device for the antenna matching circuit according to any one of claims 6 to 10.