Radio frequency antenna group and control method thereof

Abstract

The application discloses a radio frequency antenna group and a control method thereof. The radio frequency antenna group sequentially receives communication signals of a frequency band where a target frequency is located through directional antennas facing different directions, and each directional antenna only receives signals in a vertical direction thereof; target signals of the target frequency in the communication signals received by different directional antennas are extracted, and signal quality of the target signals received by different directional antennas is evaluated; a directional antenna with optimal signal quality of the target signals is determined as a communication antenna to receive the target signals. Through directional antennas facing different directions, target signals in different directions are received, and a direction with optimal signal quality of the target signals is determined through the directional antennas facing different directions, so that the isolation of the antenna is improved; in the case that radio frequency links are not increased, full coverage of the direction of the antenna can be realized by increasing the number of antennas, and the strong anti-interference capability is also achieved.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and more specifically to a radio frequency antenna array and its control method. Background Technology

[0002] With the rapid growth and increasing popularity of Wireless Fidelity (WiFi) technology, more and more mobile terminal users are using WiFi technology for communication. However, since WiFi communication uses the ISM band, which contains wireless signals of various communication frequencies, and because co-channel interference signals appear at the same time and frequency, it is difficult to filter out co-channel interference signals through circuit filtering. Therefore, co-channel interference signals in WiFi communication are very serious, resulting in poor communication quality. Summary of the Invention

[0003] To address the aforementioned issues, this invention proposes a radio frequency antenna array and its control method, which can reduce interference from co-frequency signals on the radio frequency antenna array and improve the communication quality of the radio frequency antenna array.

[0004] This invention provides a control method for a radio frequency antenna array, the method comprising:

[0005] The radio frequency antenna group is controlled to receive communication signals in the frequency band of the target frequency through directional antennas facing different directions in sequence, and each directional antenna only receives the signal in its vertical direction;

[0006] The target signal at the target frequency is extracted from the communication signals received by different directional antennas, and the signal quality of the target signal received by different directional antennas is evaluated.

[0007] The directional antenna with the optimal signal quality for the target signal is selected as the communication antenna to receive the target signal.

[0008] Preferably, the radio frequency antenna group includes n single-pole multi-throw switches, and each directional antenna includes n sub-antennas;

[0009] The stationary terminal of the i-th single-pole multi-throw switch is connected to the i-th radio frequency link;

[0010] The j-th moving end of the i-th single-pole multi-throw switch is connected to the i-th sub-antenna of the j-th directional antenna;

[0011] Where n≥1, i=1,2,…n, j=1,2,…m, m is the number of directional antennas in the radio frequency antenna group and the number of moving terminals of each single-pole multi-throw switch, m≥1.

[0012] Furthermore, the control of the radio frequency antenna group to sequentially receive communication signals in the frequency band of the target frequency through directional antennas facing different directions specifically includes:

[0013] The first directional antenna facing the first direction is connected to the radio frequency link through n single-pole multi-throw switches, and the signals of the frequency band received by all sub-antennas of the first directional antenna are collected through n radio frequency links as the communication signals received by the first directional antenna.

[0014] Several radio frequency links are connected to directional antennas in different directions by n single-pole multi-throw switches, and the communication signals received by all directional antennas are collected.

[0015] Preferably, the evaluation of the signal quality of the target signal received by different directional antennas specifically includes:

[0016] Calculate the signal-to-noise ratio (SNR) of the target signal received by different directional antennas, and determine the signal quality of the target signal based on the SNR value.

[0017] Preferably, the evaluation of the signal quality of the target signal received by different directional antennas specifically includes:

[0018] Calculate the throughput of the target signal received by different directional antennas, and determine the signal quality of the target signal based on the throughput.

[0019] Preferably, the evaluation of the signal quality of the target signal received by different directional antennas specifically includes:

[0020] Calculate the throughput and signal-to-noise ratio of the target signal received by different directional antennas;

[0021] The throughput and signal-to-noise ratio received by each directional antenna are weighted and summed according to preset weights to obtain a communication quality score for each directional antenna.

[0022] The signal quality of the target signal is determined based on the communication quality score of each directional antenna.

[0023] This invention provides a radio frequency antenna group, which is applicable to the control method of any of the radio frequency antenna groups described in the above embodiments. The radio frequency antenna group includes n single-pole multi-throw switches, m directional antennas with different orientations, and each directional antenna includes n sub-antennas.

[0024] The stationary terminal of the i-th single-pole multi-throw switch is connected to the i-th radio frequency link;

[0025] The j-th moving end of the i-th single-pole multi-throw switch is connected to the i-th sub-antenna of the j-th directional antenna;

[0026] Where n≥1, i=1,2,…n, j=1,2,…m, m is the number of moving terminals of each single-pole multi-throw switch, m≥1.

[0027] Furthermore, the radio frequency antenna group includes four directional antennas, wherein the orientation of any one directional antenna is perpendicular to the orientation of two of the other three directional antennas and opposite to the orientation of the other directional antenna.

[0028] Each directional antenna has its sub-antennas arranged vertically.

[0029] Preferably, the directional antennas of the radio frequency antenna group are all circularly polarized antennas.

[0030] Preferably, each sub-antenna of the radio frequency antenna group is a centrally symmetrical area array antenna.

[0031] This invention provides a radio frequency antenna array and its control method. By using directional antennas in different directions to receive target signals from different directions, the optimal direction for target signal quality is determined through these directional antennas, thereby reducing interference from co-channel interference signals and improving communication quality. It also improves antenna isolation; without increasing the number of antennas, full coverage in the antenna direction can be achieved by increasing the number of antennas, while also possessing strong anti-interference capabilities. Attached Figure Description

[0032] Figure 1 This is a flowchart illustrating a control method for a radio frequency antenna array provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of a radio frequency antenna array provided in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the directional antenna distribution of a radio frequency antenna group provided in an embodiment of the present invention. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This invention provides a control method for a radio frequency antenna array, see below. Figure 1 This is a flowchart illustrating a control method for a radio frequency antenna array provided in an embodiment of the present invention. The method includes steps S1 to S3:

[0037] S1, control the radio frequency antenna group to receive communication signals in the frequency band of the target frequency through directional antennas facing different directions in sequence, and each directional antenna only receives the signal in its vertical direction;

[0038] S2, extract the target signal of the target frequency from the communication signals received by different directional antennas, and evaluate the signal quality of the target signal received by different directional antennas;

[0039] S3, determine the directional antenna with the best signal quality for the target signal as the communication antenna, and receive the target signal.

[0040] In this specific implementation, the radio frequency antenna group includes several directional antennas, each directional antenna facing a different direction, and each directional antenna only receives signals in its vertical direction. By using directional antennas facing different directions, signals from different directions can be received.

[0041] When it is necessary to receive a target signal during communication, the target frequency of the target signal is obtained. Since the antenna can only accurately receive signals within a certain frequency band, when receiving signals in the frequency band where the target frequency is located, signals of the same frequency at other frequencies will also be received. However, since the direction of the co-channel interference signal is different from that of the target signal, the direction of the optimal quality of the target signal is determined by using directional antennas in different directions, thereby reducing the interference of co-channel interference signals.

[0042] By controlling the directional antenna of the radio frequency antenna group, signals in the frequency band where the target frequency is located are received sequentially from different directions. The received signals include the target signal and co-channel interference signals.

[0043] The target signal can be extracted from the communication signals received by different directional antennas, and the interference signal in the signals received by different directional antennas can also be obtained.

[0044] The quality of the target signal in the communication signals received by different directional antennas is evaluated. The quality evaluation methods include, but are not limited to, signal-to-noise ratio evaluation, throughput evaluation, and target signal received power evaluation.

[0045] The directional antenna with the best signal quality after evaluation is selected as the communication antenna, and the target signal is received by the communication antenna for communication.

[0046] By using directional antennas in different directions to receive target signals from different directions, the direction in which the target signal quality is optimal can be determined, thereby reducing interference from co-channel interference signals and improving communication quality.

[0047] It should be noted that by increasing the number of directional antennas, the receiving direction can be refined, the angular coverage of the radio frequency antenna group can be achieved, and the anti-interference capability at the same frequency can be improved.

[0048] In another embodiment of the present invention, the radio frequency antenna group includes n single-pole multi-throw switches, and each directional antenna includes n sub-antennas;

[0049] The stationary terminal of the i-th single-pole multi-throw switch is connected to the i-th radio frequency link;

[0050] The j-th moving end of the i-th single-pole multi-throw switch is connected to the i-th sub-antenna of the j-th directional antenna;

[0051] Where n≥1, i=1,2,…n, j=1,2,…m, m is the number of directional antennas in the radio frequency antenna group and the number of moving terminals of each single-pole multi-throw switch, m≥1.

[0052] In the specific implementation of this embodiment, please refer to Figure 2 This is a schematic diagram of the structure of a radio frequency antenna group provided in an embodiment of the present invention;

[0053] The radio frequency antenna group includes two single-pole four-throw switches and four directional antennas, each of which includes two sub-antennas; the two single-pole four-throw switches are the first single-pole four-throw switch SP4T1 and the second single-pole four-throw switch SP4T2, and each single-pole four-throw switch includes four moving terminals.

[0054] The four directional antennas are designated as first directional antenna T1, second directional antenna T2, third directional antenna T3, and fourth directional antenna T4. First directional antenna T1 includes first sub-antenna T11 and second sub-antenna T12; second directional antenna T2 includes third sub-antenna T21 and fourth sub-antenna T22; third directional antenna T3 includes fifth sub-antenna T31 and sixth sub-antenna T32; and fourth directional antenna T4 includes seventh sub-antenna T41 and eighth sub-antenna T42.

[0055] The stationary terminal of the first single-pole four-throw switch SP4T1 is connected to the first radio frequency link TRX1, and the stationary terminal of the second single-pole four-throw switch SP4T2 is connected to the second radio frequency link TRX2. The downlink signal sent by the radio frequency chip is transmitted to the directional antenna through the radio frequency link, and the uplink signal received by the directional antenna is fed back to the radio frequency chip through the radio frequency link.

[0056] The first moving end of the first single-pole four-throw switch SP4T1 is connected to the first sub-antenna T11 of the first directional antenna T1, the second moving end of the first single-pole four-throw switch SP4T1 is connected to the third sub-antenna T21 of the second directional antenna T2, the third moving end of the first single-pole four-throw switch SP4T1 is connected to the fifth sub-antenna T31 of the third directional antenna T3, and the fourth moving end of the first single-pole four-throw switch SP4T1 is connected to the seventh sub-antenna T41 of the fourth directional antenna T4.

[0057] The first moving end of the second single-pole four-throw switch SP4T2 is connected to the second sub-antenna T12 of the first directional antenna T1, the second moving end of the second single-pole four-throw switch SP4T2 is connected to the fourth sub-antenna T22 of the second directional antenna T2, the third moving end of the second single-pole four-throw switch SP4T2 is connected to the sixth sub-antenna T32 of the third directional antenna T3, and the fourth moving end of the second single-pole four-throw switch SP4T2 is connected to the eighth sub-antenna T42 of the fourth directional antenna T4.

[0058] It should be noted that this embodiment uses 4 directional antennas, each of which includes two sub-antennas. The sub-antennas are connected to two radio frequency links through two single-pole four-throw switches to illustrate the specific structure of the radio frequency antenna group. However, in other embodiments, the number of directional antennas, single-pole four-throw switches, sub-antennas and radio frequency links in the radio frequency antenna group can be other numbers, and their connection relationship is similar to that in this embodiment, which will not be described in detail here.

[0059] Different sub-antennas are connected by a single-pole multi-throw switch, and different directional antennas can be controlled by the single-pole multi-throw switch.

[0060] In another embodiment provided by the present invention, step S1 specifically includes:

[0061] The first directional antenna facing the first direction is connected to the radio frequency link through n single-pole multi-throw switches, and the signals of the frequency band received by all sub-antennas of the first directional antenna are collected through n radio frequency links as the communication signals received by the first directional antenna.

[0062] Several radio frequency links are connected to directional antennas in different directions by n single-pole multi-throw switches, and the communication signals received by all directional antennas are collected.

[0063] In this specific implementation, the first directional antenna T1 is connected to the radio frequency link by controlling two single-pole four-throw switches. Specifically, by switching the switch of the first single-pole four-throw switch SP4T1 to the first moving end, the first sub-antenna T11 is connected to the first radio frequency link through the first single-pole four-throw switch SP4T1; by switching the switch of the second single-pole four-throw switch SP4T2 to the first moving end, the second sub-antenna T12 is connected to the second radio frequency link through the second single-pole four-throw switch SP4T2. By having the two sub-antennas on the two radio frequency lines simultaneously receive the target signal oriented towards the first directional antenna T1, the anti-interference capability of the radio frequency antenna group can be improved.

[0064] By changing the switching states of two single-pole four-throw switches, sub-antennas of directional antennas facing different directions are connected to the radio frequency link, completing the acquisition of communication signals in the direction of each directional antenna, specifically:

[0065] By switching the switch of the first single-pole four-throw switch SP4T1 to the second moving end, the third sub-antenna T21 is connected to the first radio frequency link through the first single-pole four-throw switch SP4T1; by switching the switch of the second single-pole four-throw switch SP4T2 to the second moving end, the fourth sub-antenna T22 is connected to the second radio frequency link through the second single-pole four-throw switch SP4T2; the two sub-antennas on the two radio frequency lines simultaneously receive the target signal oriented towards the second directional antenna T2;

[0066] By switching the switch of the first single-pole four-throw switch SP4T1 to the third moving end, the fifth sub-antenna T31 is connected to the first radio frequency link through the first single-pole four-throw switch SP4T1; by switching the switch of the second single-pole four-throw switch SP4T2 to the third moving end, the sixth sub-antenna T32 is connected to the second radio frequency link through the second single-pole four-throw switch SP4T2; the two sub-antennas on the two radio frequency lines simultaneously receive the target signal oriented towards the third directional antenna T3;

[0067] By switching the switch of the first single-pole four-throw switch SP4T1 to the fourth active terminal, the seventh sub-antenna T41 is connected to the first radio frequency link through the first single-pole four-throw switch SP4T1; by switching the switch of the second single-pole four-throw switch SP4T2 to the fourth active terminal, the eighth sub-antenna T42 is connected to the second radio frequency link through the second single-pole four-throw switch SP4T2; the two sub-antennas on the two radio frequency lines simultaneously receive the target signal oriented towards the fourth directional antenna T4.

[0068] It should be noted that this embodiment uses four directional antennas, each of which includes two sub-antennas. The sub-antennas are connected to two radio frequency links via two single-pole four-throw switches to illustrate the method of receiving communication signals from different directions of the radio frequency antenna group. However, in other embodiments, the number of directional antennas, single-pole four-throw switches, sub-antennas, and radio frequency links in the radio frequency antenna group can be other numbers, and their signal reception methods are similar to those in this embodiment, which will not be described in detail here.

[0069] By switching a single-pole multi-throw switch to different moving ends, sub-antennas of different directional antennas can be connected to the RF link. Communication signals from different directions can be received through sub-antennas with different orientations. Directional antennas with different orientations can be connected to the RF chip through two RF links. Without increasing the number of RF links and without affecting the use of 2*2 MIMO communication, full coverage of antenna directions can be achieved by increasing the number of antennas, while also having strong anti-interference capabilities.

[0070] In another embodiment of the present invention, the evaluation of the signal quality of the target signal received by different directional antennas specifically includes:

[0071] Calculate the signal-to-noise ratio (SNR) of the target signal received by different directional antennas, and determine the signal quality of the target signal based on the SNR value.

[0072] In this specific implementation, the signal-to-noise ratio of the target signal extracted from the communication signals received by directional antennas in different directions is calculated;

[0073] The communication signal with the highest signal-to-noise ratio is the one with the best signal quality.

[0074] By calculating the signal-to-noise ratio (SNR) of the target signal received by different directional antennas, the SNR can reflect the power of the interference signal received at the same time as the target signal. The directional antenna with the optimal signal quality of the received communication signal is determined by the magnitude of the SNR value and used as the communication antenna. By finely controlling the direction of the radio frequency antenna group to receive the target signal, the co-channel interference signal received can be effectively reduced, and the communication quality can be improved.

[0075] In another embodiment of the present invention, the evaluation of the signal quality of the target signal received by different directional antennas specifically includes:

[0076] Calculate the throughput of the target signal received by different directional antennas, and determine the signal quality of the target signal based on the throughput.

[0077] In this specific implementation, as a parallel implementation method for evaluating signal quality, the throughput of the target signal extracted from the communication signals received by directional antennas in different directions is calculated;

[0078] The communication signal with the highest throughput is determined to have the best signal quality.

[0079] By calculating the throughput of the target signal received by different directional antennas, the throughput value reflects the amount of data of the target signal received per unit time. Based on the throughput value, the directional antenna with the best signal quality of the received communication signal is determined as the communication antenna. Through fine control of the direction of the radio frequency antenna group receiving the target signal, the interference of co-channel interference signals received by the channel on the target signal can be effectively reduced, thereby improving the communication quality.

[0080] In another embodiment of the present invention, the evaluation of the signal quality of the target signal received by different directional antennas specifically includes:

[0081] Calculate the throughput and signal-to-noise ratio of the target signal received by different directional antennas;

[0082] The throughput and signal-to-noise ratio received by each directional antenna are weighted and summed according to preset weights to obtain a communication quality score for each directional antenna.

[0083] The signal quality of the target signal is determined based on the communication quality score of each directional antenna.

[0084] In this specific implementation, as a parallel implementation method for evaluating signal quality, the signal-to-noise ratio and throughput of the target signal extracted from the communication signals received by directional antennas in different directions are calculated;

[0085] By weighting and summing the throughput, signal-to-noise ratio, and corresponding preset weighting values ​​of the target signal received by each directional antenna, the communication signal with the largest weighted sum is determined to have the best signal quality.

[0086] By calculating the throughput of target signals received by different directional antennas, the signal-to-noise ratio (SNR) can reflect the power of interference signals received simultaneously with the target signal; the throughput value can reflect the amount of data received from the target signal per unit time; by weighted summing of SNR and throughput, the signal quality of communication signals can be evaluated from different dimensions; and by fine-grained control of the direction of target signal reception by the RF antenna group, co-channel interference signals received in the channel can be effectively reduced, improving the accuracy of communication data transmission and enhancing communication quality.

[0087] Another embodiment of the present invention provides a radio frequency antenna group, which is applicable to the control method of any of the radio frequency antenna groups described in the above embodiments. The radio frequency antenna group includes n single-pole multi-throw switches, m directional antennas with different orientations, and each directional antenna includes n sub-antennas.

[0088] The stationary terminal of the i-th single-pole multi-throw switch is connected to the i-th radio frequency link;

[0089] The j-th moving end of the i-th single-pole multi-throw switch is connected to the i-th sub-antenna of the j-th directional antenna;

[0090] Where n≥1, i=1,2,…n, j=1,2,…m, m is the number of moving terminals of each single-pole multi-throw switch, m≥1.

[0091] In this specific implementation, the structure of the radio frequency antenna group is described with n=2 and m=4; see [link to relevant documentation]. Figure 2 The radio frequency antenna group includes two single-pole four-throw switches and four directional antennas, each directional antenna including two sub-antennas; the two single-pole four-throw switches are the first single-pole four-throw switch SP4T1 and the second single-pole four-throw switch SP4T2, each single-pole four-throw switch including four moving terminals.

[0092] The four directional antennas are designated as first directional antenna T1, second directional antenna T2, third directional antenna T3, and fourth directional antenna T4. First directional antenna T1 includes first sub-antenna T11 and second sub-antenna T12; second directional antenna T2 includes third sub-antenna T21 and fourth sub-antenna T22; third directional antenna T3 includes fifth sub-antenna T31 and sixth sub-antenna T32; and fourth directional antenna T4 includes seventh sub-antenna T41 and eighth sub-antenna T42.

[0093] The stationary terminal of the first single-pole four-throw switch SP4T1 is connected to the first radio frequency link TRX1, and the stationary terminal of the second single-pole four-throw switch SP4T2 is connected to the second radio frequency link TRX2. The downlink signal sent by the radio frequency chip is transmitted to the directional antenna through the radio frequency link, and the uplink signal received by the directional antenna is fed back to the radio frequency chip through the radio frequency link.

[0094] The first moving end of the first single-pole four-throw switch SP4T1 is connected to the first sub-antenna T11 of the first directional antenna T1, the second moving end of the first single-pole four-throw switch SP4T1 is connected to the third sub-antenna T21 of the second directional antenna T2, the third moving end of the first single-pole four-throw switch SP4T1 is connected to the fifth sub-antenna T31 of the third directional antenna T3, and the fourth moving end of the first single-pole four-throw switch SP4T1 is connected to the seventh sub-antenna T41 of the fourth directional antenna T4.

[0095] The first moving end of the second single-pole four-throw switch SP4T2 is connected to the second sub-antenna T12 of the first directional antenna T1, the second moving end of the second single-pole four-throw switch SP4T2 is connected to the fourth sub-antenna T22 of the second directional antenna T2, the third moving end of the second single-pole four-throw switch SP4T2 is connected to the sixth sub-antenna T32 of the third directional antenna T3, and the fourth moving end of the second single-pole four-throw switch SP4T2 is connected to the eighth sub-antenna T42 of the fourth directional antenna T4.

[0096] It should be noted that this embodiment uses 4 directional antennas, each of which includes two sub-antennas. The sub-antennas are connected to two radio frequency links through two single-pole four-throw switches to illustrate the specific structure of the radio frequency antenna group. However, in other embodiments, the number of directional antennas, single-pole four-throw switches, sub-antennas and radio frequency links in the radio frequency antenna group can be other numbers, and their connection relationship is similar to that in this embodiment, which will not be described in detail here.

[0097] This embodiment provides a radio frequency antenna array that connects directional antennas in different directions to the radio frequency link via a single-pole multi-throw switch. By analyzing the communication signal quality received by the directional antennas in different directions, the directional antenna with the best communication quality is determined as the communication antenna, thereby reducing co-channel interference and improving communication quality.

[0098] In another embodiment of the present invention, the radio frequency antenna group includes four directional antennas, wherein the orientation of any one directional antenna is perpendicular to the orientation of two of the other three directional antennas and opposite to the orientation of the other directional antenna.

[0099] Each directional antenna has its sub-antennas arranged vertically.

[0100] In the specific implementation of this embodiment, please refer to Figure 3 This is a schematic diagram of the directional antenna distribution of a radio frequency antenna group provided in an embodiment of the present invention;

[0101] The radio frequency antenna group includes four directional antennas, namely the first directional antenna T1, the second directional antenna T2, the third directional antenna T3, and the fourth directional antenna T4;

[0102] Four directional antennas are distributed on the four sides of the quadrangular prism. Each directional antenna faces the direction perpendicular to the side and outwards, and only receives signals in the direction perpendicular to the side it is located on.

[0103] In this configuration, the first directional antenna T1 and the third directional antenna T3 face opposite directions, and the second directional antenna T2 and the fourth directional antenna T4 face opposite directions; the orientation of the first directional antenna T1 is perpendicular to the orientation of the second directional antenna T2 and the fourth directional antenna T4; the orientation of the third directional antenna T3 is perpendicular to the orientation of the second directional antenna T2 and the fourth directional antenna T4; the orientation of the second directional antenna T2 is perpendicular to the orientation of the first directional antenna T1 and the third directional antenna T3; and the orientation of the fourth directional antenna T4 is perpendicular to the orientation of the first directional antenna T1 and the third directional antenna T3.

[0104] Each directional antenna includes at least one sub-antenna. When a directional antenna includes multiple sub-antennas, the sub-antennas of each directional antenna are distributed vertically and face the same direction.

[0105] Taking each directional antenna as an example, which includes two sub-antennas, the first directional antenna T1 includes a first sub-antenna T11 and a second sub-antenna T12, which are arranged vertically; the second directional antenna T2 includes a third sub-antenna T21 and a fourth sub-antenna T22, which are arranged vertically; the third directional antenna T3 includes a fifth sub-antenna T31 and a sixth sub-antenna T32, which are arranged vertically; and the fourth directional antenna T4 includes a seventh sub-antenna T41 and an eighth sub-antenna T42, which are arranged vertically.

[0106] The moving ends of two single-pole four-throw switches are connected to the eight sub-antennas of four directional antennas respectively. The four directional antennas are perpendicular to each other, and different directional antennas receive signals from different directions. This constitutes a 2*2 MIMO communication system, which can improve the isolation of the antennas. Without increasing the number of antennas, full coverage of the antenna direction can be achieved by increasing the number of antennas without increasing the RF link. At the same time, it has a strong anti-interference capability.

[0107] In another embodiment of the present invention, the directional antennas of the radio frequency antenna group are all circularly polarized antennas.

[0108] In this specific implementation, the directional antenna is used to receive signals in the vertical direction, reducing interference from co-frequency signals in other directions on the target signal. Furthermore, the directional antenna is a circularly polarized antenna, which can adapt to all polarization directions of the received target signal and achieve high gain control.

[0109] In another embodiment of the present invention, each sub-antenna of the radio frequency antenna group is a centrally symmetrical area array antenna.

[0110] In the specific implementation of this embodiment, please refer to Figure 3 As shown, the first sub-antenna T11 and the second sub-antenna T12 of the first directional antenna T1 are centrally symmetrical area array antennas. The four area array antennas are distributed at the four corners of the square, with equal spacing in all directions.

[0111] It should be noted that in this embodiment, the number of area array antennas is 4, and the arrangement is a square arrangement; in other embodiments, the number of area array antennas is not 4, and the arrangement can be any centrally symmetrical arrangement, for example, the centers of all area array antennas are distributed on a circle, and are centrally symmetrical with the center of the circle as the center.

[0112] By using a centrally symmetrical array antenna as a sub-antenna of the directional antenna, better radiation pattern and gain control can be achieved.

[0113] It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered to be within the scope of protection of this invention.

Claims

1. A control method for a radio frequency antenna array, characterized in that, The radio frequency antenna group includes n single-pole multi-throw switches, and each directional antenna includes n sub-antennas; The stationary terminal of the i-th single-pole multi-throw switch is connected to the i-th radio frequency link; The j-th moving end of the i-th single-pole multi-throw switch is connected to the i-th sub-antenna of the j-th directional antenna; Where n≥1, i=1,2,…n, j=1,2,…m, m is the number of directional antennas in the radio frequency antenna group and the number of moving terminals of each single-pole multi-throw switch, m≥1; The method includes: A first directional antenna facing a first direction is connected to an RF link via n single-pole multi-throw switches. Signals in the frequency bands received by all sub-antennas of the first directional antenna are collected through n RF links and used as the communication signals received by the first directional antenna. Several RF links are connected to directional antennas facing different directions via n single-pole multi-throw switches in sequence, and the communication signals received by all directional antennas are collected. Each directional antenna only receives signals in its vertical direction. The target signal at the target frequency is extracted from the communication signals received by different directional antennas, and the signal quality of the target signal received by different directional antennas is evaluated. The directional antenna with the optimal signal quality for the target signal is selected as the communication antenna to receive the target signal.

2. The control method for the radio frequency antenna array according to claim 1, characterized in that, The evaluation of the signal quality of the target signal received by different directional antennas specifically includes: Calculate the signal-to-noise ratio (SNR) of the target signal received by different directional antennas, and determine the signal quality of the target signal based on the SNR value.

3. The control method for the radio frequency antenna array according to claim 1, characterized in that, The evaluation of the signal quality of the target signal received by different directional antennas specifically includes: Calculate the throughput of the target signal received by different directional antennas, and determine the signal quality of the target signal based on the throughput.

4. The control method for the radio frequency antenna array according to claim 1, characterized in that, The evaluation of the signal quality of the target signal received by different directional antennas specifically includes: Calculate the throughput and signal-to-noise ratio of the target signal received by different directional antennas; The throughput and signal-to-noise ratio received by each directional antenna are weighted and summed according to preset weights to obtain a communication quality score for each directional antenna. The signal quality of the target signal is determined based on the communication quality score of each directional antenna.

5. A radio frequency antenna assembly, wherein the radio frequency antenna assembly is applicable to the control method of the radio frequency antenna assembly according to any one of claims 1 to 4, characterized in that, The radio frequency antenna group includes n single-pole multi-throw switches, m directional antennas facing different directions, and each directional antenna includes n sub-antennas; The stationary terminal of the i-th single-pole multi-throw switch is connected to the i-th radio frequency link; The j-th moving end of the i-th single-pole multi-throw switch is connected to the i-th sub-antenna of the j-th directional antenna; Where n≥1, i=1,2,…n, j=1,2,…m, m is the number of moving terminals of each single-pole multi-throw switch, m≥1.

6. The radio frequency antenna assembly according to claim 5, characterized in that, The radio frequency antenna group includes four directional antennas, the orientation of any one directional antenna is perpendicular to the orientation of two of the other three directional antennas, and opposite to the orientation of the other directional antenna; Each directional antenna has its sub-antennas arranged vertically.

7. The radio frequency antenna assembly according to claim 6, characterized in that, The directional antennas in the radio frequency antenna group are all circularly polarized antennas.

8. The radio frequency antenna assembly according to claim 7, characterized in that, Each sub-antenna of the radio frequency antenna group is a centrally symmetrical area array antenna.

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