WO2022077423A1

WO2022077423A1 - Array antenna system

Info

Publication number: WO2022077423A1
Application number: PCT/CN2020/121438
Authority: WO
Inventors: 郭力文; 孙飞; 时文文
Original assignee: 鹤壁天海电子信息系统有限公司
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2022-04-21

Abstract

The present application provides an array antenna system, comprising an array antenna and a beam steering network. The array antenna has a surrounding structure consisting of multiple surfaces constituted by multiple directional unit antennas. The number of multiple surfaces is not less than four. The beam steering network comprises multiple switching devices. At any time during operation of the array antenna system, the multiple switching devices control a directional unit antenna on any surface of the array antenna to perform signal transmission with a combiner, or control any number of consecutively adjacent directional unit antennas on any number of surfaces, but not all, to perform signal transmission with the combiner. One switching device controls a pre-configured number of directional unit antennas in the array antenna. The multiple switching devices and the multiple signal transmission interfaces of the combiner have a one-to-one correspondence. In the present application, a directional beam that can be formed by the array antenna can cover the entire horizontal plane, and signal transmission distance and signal transmission quality of the system are increased.

Description

An array antenna system

technical field

The present application relates to the field of antennas, and in particular, to an array antenna system.

Background technique

Traditional car radio antennas mostly use sucker wire antennas or fiberglass antennas, and their typical beams are similar to dipole beams, and in order to achieve high gain performance, a coaxial array is usually used, which makes the antenna heavier or longer.

Among them, the traditional vehicle radio antenna can achieve no blind spot coverage of the beam in the horizontal plane.

However, there are problems of insufficient gain and poor anti-interference performance, which greatly limit the signal transmission distance and signal transmission quality of the whole system, especially in a complex electromagnetic environment.

Utility model content

The present application provides an array antenna system, which aims to improve the signal transmission distance and signal transmission quality while ensuring that the beams in the horizontal plane have no blind spot coverage.

In order to achieve the above purpose, the application provides the following technical solutions:

The application provides an array antenna system, including: an array antenna and a beam steering network;

The array antenna is an array antenna with a multi-faceted surrounding structure formed by a plurality of directional element antennas; the multi-facet is not less than 4;

The beam control network includes a plurality of switching devices; the plurality of switching devices control the directional element antenna and the combiner on any surface of the array antenna at any time during the operation of the array antenna system Signal transmission is performed between, or, signal transmission is performed between the directional element antennas on any number but not all surfaces adjacent to the control sequence and the combiner;

Wherein, one of the switching devices controls a preset number of directional element antennas in the array antenna; the multiple switching devices are in one-to-one correspondence with multiple signal transmission interfaces of the combiner.

Optionally, the horizontal plane 3dB lobe width of the beam formed by any one of the directional element antennas on the horizontal plane is not less than 90 degrees.

Optionally, the directional element antennas at the same relative position on each surface of the array antenna are located on the same horizontal plane.

Optionally, one of the switching devices controls any one of the directional element antennas on a horizontal plane or any plurality of directional element antennas adjacent in sequence to work.

Optionally, the beam control network further includes: a plurality of amplitude and phase control modules and a plurality of T/R components; wherein, between the amplitude and phase control modules, the T/R components, the switching device and the signal transmission interface of the combiner One-to-one correspondence; one end of the amplitude-phase control module is connected to the corresponding interface of the combiner; the other end of the amplitude-phase control module is connected to one end of the corresponding T/R assembly; The other end is connected with the corresponding switch device;

The amplitude and phase control module is used to adjust the amplitude and phase of the received signal and the transmitted signal;

The T/R component is used for switching the transceiving signal, and performing power amplification on the received signal and the transmitted signal;

Signal transmission is performed between the T/R assembly and the corresponding switching device.

Optionally, the beam steering network further includes: a plurality of band-pass filters; wherein, the plurality of band-pass filters are in one-to-one correspondence with the plurality of T/R components and the plurality of switching devices; the One end of the T/R assembly is connected with the corresponding amplitude-phase control module; the other end of the T/R assembly is connected with one end of the corresponding bandpass filter; the other end of the bandpass filter is connected with the corresponding switching device connect;

The band-pass filter is used to suppress interference signals other than preset frequency bands in the received signal and the transmitted signal.

Optionally, the beam steering network is located in a multi-faceted surrounding structure of the array antenna.

Optionally, the directional unit antenna is a printed folded dipole with a U-shaped metal reflector.

Optionally, the array antenna is an array antenna with a four-sided surround structure composed of multiple directional element antennas.

Optionally, the switch device controls the directional element antennas on any one surface or any two adjacent surfaces of the array antenna to operate at any time during the operation of the array antenna system.

The array antenna system described in this application includes an array antenna and a beam steering network, wherein the array antenna is an array antenna with a multi-faceted surrounding structure formed by multiple directional element antennas; It includes a plurality of switching devices; wherein, the plurality of switching devices control the signal transmission between the directional element antenna and the combiner on any one surface of the array antenna, or control any number of adjacent but not all surfaces in the sequence. Signal transmission is performed between the directional element antenna and the combiner. Wherein, one switching device controls a preset number of directional element antennas in the array antenna; a plurality of switching devices are in one-to-one correspondence with a plurality of signal transmission interfaces of the combiner.

In this application, multiple switching devices control the operation of the directional element antennas on any one surface of the array antenna, or control the operation of the directional element antennas on any number but not all surfaces adjacent in sequence, so that the array antenna system works At any time in the process, one surface of the array antenna or the directional element antennas on any number but not all surfaces adjacent in sequence work. Since it is an array antenna, the directional element antennas on any surface in the working state, or the directional element antennas on any number but not all surfaces adjacent in sequence, can form directional beams on the horizontal plane.

On the one hand, in the present application, since at any time during the operation of the array antenna, only the directional element antennas on one surface work, or only the directional element antennas on any number but not all of the surfaces that are adjacent in sequence work. , the directional element antennas on other surfaces do not work, so that, on the one hand, the energy of the formed directional beam can be guaranteed to be large, thereby improving the transmission distance of the signal; on the other hand, it does not receive signals in other directions, so , signal interference in other directions can be avoided, and thus, the transmission quality of the signal can be improved.

On the other hand, in the present application, since the array antenna is a surrounding structure, the directional element antennas on any one surface or sequentially adjacent multiple but not all surfaces controlled by the switch device at different times are in working state. The directions of the formed directional beams may be different, and may surround the entire horizontal plane. Therefore, the directional beams formed on the horizontal plane at different times of operation of the array antenna of the present application may cover the entire horizontal plane.

To sum up, the present application improves the signal transmission distance and signal transmission quality of the system under the condition that the directional beam formed by the array antenna can cover the entire horizontal plane.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of an array antenna system disclosed in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of another array antenna system disclosed in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of another array antenna system disclosed in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of another array antenna system disclosed in an embodiment of the present application;

5 is a schematic diagram of the position distribution of a directional element antenna in an array antenna disclosed in an embodiment of the present application;

FIG. 6 is a case where the eight four-to-one or four-to-two switch chips disclosed in the embodiment of the application control any one front to work, or control any two adjacent fronts to work at the same time, the directional beam that can be formed is covered by the Schematic diagram of the distribution of the azimuth plane area;

FIG. 7 is a schematic diagram of beam scanning on the elevation plane when only the directional element antenna on one front face of the array antenna disclosed in the embodiment of the present application works at a moment;

FIG. 8 is a schematic diagram of beam scanning on the elevation plane when the directional element antennas on two adjacent fronts in the array antenna disclosed in the embodiment of the present application work at one moment.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

FIG. 1 provides an array antenna system according to an embodiment of the present application, including: an array antenna and a beam steering network.

Among them, the array antenna is an array antenna with a multi-faceted surrounding structure formed by a plurality of directional element antennas. Wherein, in this embodiment, the multi-surface surrounding structure is not less than 4-surface surrounding structure, and the beam steering network includes a plurality of switching devices and a plurality of T/R components, wherein the signals of the switching devices, the T/R components and the combiner are The transmission interfaces are in one-to-one correspondence, that is, in this embodiment, the switching device in the beam steering network is connected to one end of the corresponding T/R component, and the other end of the T/R component is connected to the corresponding interface of the combiner. Wherein, in this embodiment, a switch device controls a preset number of directional element antennas in the array antenna, that is, for any switch device, when the switch state of the switch device indicates that the switch device is on, the preset number controlled by the switch device The directional unit antenna communicates with the corresponding interface of the combiner, wherein the corresponding interface of the combiner is the interface corresponding to the switch device in the combiner.

The switch device may be a switch chip or a switch circuit, and this embodiment does not limit the specific implementation of the switch device.

Among them, the T/R component is used for switching the transceiving signal and performing power amplification on the transceiving signal (receiving signal and transmitting signal, hereinafter referred to as the transceiving signal for convenience of description). Wherein, the T/R component may include a low noise amplifier, a power amplifier, a transceiver switch, and the like. The specific implementation principle of the T/R component is in the prior art, which will not be repeated here. Among them, the combiner is used to realize power distribution when transmitting signals or power combining when receiving signals.

Among them, the directional element antennas on each side of the array antenna are distributed in the form of an array. In practice, the number of directional element antennas on each surface may be determined according to the actual situation, which is not limited in this embodiment.

In practice, the directional element antenna on each side can be a printed folded dipole with a U-shaped metal reflector, or a high-gain wide-lobe directional antenna element with a reflective floor. Of course, in practice, the directional element The unit antenna may also be in other forms, and this embodiment does not limit the specific form.

In this embodiment, at any time during the operation of the array antenna system, the plurality of switching devices control the operation of the directional element antennas on any surface of the array antenna, or control any number but not all of the adjacent array antennas. The directional element antenna on the surface works. That is, at any time during the operation of the array antenna system, under the control of multiple switching devices, the array antenna has only one surface or the directional element antennas on multiple but not all surfaces adjacent to each other in sequence. It can be any surface of the array antenna, and multiple but not all surfaces that are adjacent in sequence can be any number but not all surfaces that are adjacent to each other in sequence in the array antenna.

Wherein, during the working process of the array antenna system, a plurality of switching devices control which surface of the array antenna is in the working state, or which surface of the array antenna is in the working state, or multiple but not all surfaces in the working state adjacent to each other are the array antenna The process of determining which planes in the system are in the prior art, and will not be repeated here.

In this embodiment, on the one hand, at any time during the operation of the array antenna, only the directional element antennas on one surface work, or only the directional element antennas on any number but not all surfaces adjacent to each other in sequence The directional unit antennas on other surfaces do not work, thus, on the one hand, the energy of the formed directional beam can be guaranteed to be large, so that the energy can be significantly focused on the communication direction and the communication distance can be improved; on the other hand, it can be significantly suppressed. The interference signal outside the communication direction can ensure the anti-interference performance of the whole system in a complex electromagnetic environment, thereby improving the transmission quality of the signal.

On the other hand, since the array antenna is a surrounding structure, the directional beams formed by the directional element antennas on any surface or the directional element antennas on the adjacent multiple but not all surfaces controlled by the switch device at different times in the working state can be The directions can be different, and can surround the entire horizontal plane. Therefore, the directional beams formed on the horizontal plane at different times of operation of the array antenna of the present application can cover the entire horizontal plane.

To sum up, this embodiment can improve the signal transmission distance and signal transmission quality of the system under the condition that the directional beam formed by the array antenna can cover the entire horizontal plane.

Because in this embodiment, during the working process of the array antenna system, under the control of a plurality of switching devices, the directional element antenna in the working state in the array antenna forms a directional beam on the horizontal plane. Wherein, at different times, the directional beams formed on the horizontal plane by the directional element antennas in the working state may be different, and the different directional beams have different coverage areas on the horizontal plane respectively. In this embodiment, in order to ensure that there is overlap between adjacent coverage areas, and that the fluctuation range between the gain at the overlap and the maximum gain is not greater than 3dB, in this embodiment, it is necessary to ensure that multiple switching devices control any surface Or when the directional element antennas on any multiple planes adjacent in sequence work, the horizontal 3dB lobe width of the beam formed by any single directional element antenna on the horizontal plane is not less than 90 degrees.

Optionally, in this embodiment, the directional element antennas on each surface of the array antenna are distributed in an array, wherein the directional element antennas at the same relative position on each surface are located on the same horizontal plane.

Optionally, in this embodiment, a switch device in the beam steering network controls any one of the directional element antennas on a horizontal plane or any plurality of directional element antennas adjacent in sequence to work.

FIG. 2 provides yet another array antenna system according to an embodiment of the present application, including an array antenna and a beam steering network.

Wherein, the beam control network includes multiple switching devices, multiple T/R components and multiple amplitude and phase control modules. Among them, a switch device controls the directional element antenna located on a horizontal plane in the array antenna to work. In addition, there is a one-to-one correspondence between the switching device, the T/R component, the amplitude-phase control module and the signal transmission interface of the combiner. One end of the amplitude-phase control module is connected to the corresponding interface of the combiner, the other end of the amplitude-phase control module is connected to one end of the corresponding T/R component, and the other end of the T/R component is connected to the corresponding switching device.

Among them, the amplitude and phase control module is used to adjust the amplitude and phase of the received and received signals. The specific implementation principle of the amplitude and phase adjustment of the received and received signals by the amplitude and phase control module is the prior art, which will not be repeated here. In this embodiment, the amplitude and phase control module adjusts the amplitude and phase of the transceiving signal, so as to realize beam scanning in the elevation plane, and further realize beam coverage in the vertical plane.

In this embodiment, the amplitude and phase control module also performs signal transmission with the corresponding T/R components.

Wherein, the T/R component also performs signal transmission with the corresponding switching device.

In practice, the directional unit antenna in working state under the control of the switching device performs signal transmission with the corresponding switching device. Under the control of the switching device, the directional element antenna in the non-working state does not carry out signal transmission with the corresponding switching device.

Optionally, in this embodiment, the beam steering network may further include multiple bandpass filters, as shown in FIG. 3 , wherein the multiple bandpass filters are combined with multiple T/R components and multiple switching devices. one-to-one correspondence. Specifically, one end of the amplitude-phase control module is connected to the corresponding interface of the combiner, the other end of the amplitude-phase control module is connected to one end of the T/R component, and the other end of the T/R component is connected to one end of the corresponding bandpass filter Connect, the other end of the band-pass filter is connected with the corresponding switch device.

In this embodiment, the band-pass filters respectively perform signal transmission between the corresponding T/R components and the corresponding switching devices. The band-pass filter is used to suppress interfering signals other than the preset frequency band in the transceiving signal. Wherein, the specific implementation principle of the band-pass filter is the prior art, which will not be repeated here.

Optionally, in this embodiment, the beam steering network may be located in the multi-faceted surrounding structure of the array antenna, so as to realize the integrated integration of the array antenna and the beam controller.

It should be noted that, in this embodiment, the band-pass filter is placed in front of the T/R component, which is just a specific implementation manner. In practice, the band-pass filter can be placed in front of the T/R component in addition to In addition, it can also be placed behind the T/R component, or can be placed inside the T/R component. This embodiment does not limit the specific position of the bandpass filter.

This embodiment has the following beneficial effects:

Beneficial effect one:

The array antenna adopts a multi-faceted surround structure, and achieves no blind spot coverage on the horizontal plane by overlapping multiple high-gain wide beams distributed around it.

Beneficial effect two:

The beam control network can include an amplitude and phase control module to adjust the amplitude and phase of the input signal, thereby realizing the phase-controlled scanning of the elevation plane, and the vertical plane beam coverage can be taken into account through the amplitude and phase adjustment.

Beneficial effect three:

The integrated design of the array antenna and the beam control network is adopted, and the beam control network is placed in a multi-faceted surrounding structure to realize the integrated design of the array antenna and the beam control network, which can not only reduce the loss of radio frequency connection of different functional modules, thereby The working efficiency of the antenna system is effectively improved, and the structure can be more compact and firm.

Beneficial effect four:

In this embodiment, the composition structure of the beam steering network is simple, that is, a complex beam forming network is not required, so that the cost and control complexity can be reduced.

FIG. 4 is another array antenna system provided by an embodiment of the present application. The array antenna adopts a four-sided surrounding structure, each side is composed of 8 directional element antennas to form a uniform linear array, and the switching device is a switching chip as an example.

Specifically, the position distribution of the directional element antennas in the array antenna is shown in FIG. 5 , and the gray area in FIG. 5 represents the directional element antennas. Among them, the directional element antennas with the same relative position on each plane of the array antenna are on the same horizontal plane. In Figure 5, the directional element antennas on the array antenna have numbers, wherein the number of any directional element antenna is m-n, where (m=1, 2, 3, 4; n=1, 2,...N ), representing the n-th directional element antenna on the m-th plane.

Among them, the directional antenna unit can be a printed folded dipole with a U-shaped metal reflector, or a high-gain wide-lobe antenna unit with a reflecting floor. Of course, in practice, other forms of antenna units can also be used. The embodiment is not limited. In this embodiment, the size of the array antenna may be length×diameter=5.6λ0×0.8λ0 (λ0 is the free space wavelength).

In this embodiment, the beam steering network is all placed in a four-sided structure surrounded by a U-shaped metal reflector, so as to realize the integrated design of the array antenna and the beam steering network, which can not only reduce the loss of radio frequency connection of different functional modules, but also Therefore, the working efficiency of the antenna system can be effectively improved, and the structure can be more compact and firm.

In this embodiment, in order to reduce the cost of the array antenna system, different fronts of the array antenna multiplex a set of beam steering networks, that is, the directional element antennas on the same horizontal plane in the array antenna are selected from four or four of the corresponding switch chips. The second working mode, and the on-off of the switch chip in the working mode, determine the directional unit antenna in the access beam control network on the same horizontal plane. Among them, the directional unit antenna connected to the beam control network shares the corresponding band-pass filter, T/R component and amplitude and phase control module. The functions of the band-pass filter, the T/R component, and the amplitude-phase control module are the same as those of the above-mentioned embodiment, which will not be repeated here.

For example, switch chip 1 in Figure 4 is only responsible for the on-off of directional unit antenna 1_1, directional unit antenna 2_1, directional unit antenna 3_1 and directional unit antenna 4_1, while switch chip 2 is only responsible for directional unit antenna 1_2 and directional unit antenna 2_2 , the directional element antenna 3_2, and the on-off of the directional element antenna 4_2, and so on. When all the switch chips work in the one-of-four mode, only one directional element antenna of the array antenna works, that is, only one directional element antenna is connected to the beam control network. When all the switch chips work in the four-to-two mode, the directional element antennas on the adjacent two sides of the array antenna work simultaneously, that is, the directional element antennas on the adjacent two sides of the array antenna are simultaneously connected to the beam control network.

In this embodiment, when the array antenna has only one directional element antenna on one side or two adjacent directional element antennas working at the same time, a summary of the corresponding areas of the formed beam covering the horizontal plane is shown in Table 1. In this embodiment, in order to achieve good beam overlap in the horizontal plane, each directional element antenna requires a horizontal 3dB lobe width of not less than 90°, and in practice, its horizontal 3dB lobe width can be 100°.

Table 1

Through the hybrid working mechanism of beam switching and phased scanning, the structure of the array antenna surrounded on all sides, and the integrated design of the antenna and the beam steering network, this embodiment not only has a compact structure, but also can be flexible only through the multiplexing of the simple beam steering network. To achieve multiple beam pointing, the implementation cost and control complexity are also low.

In order to visually show the test results of this embodiment, Fig. 6 is a diagram that can be formed when 8 four-to-one or four-to-two switch chips control any one array to work, or control any two adjacent arrays to work at the same time. Distribution map of the azimuth plane area covered by the directional beam. Among them, the ordinate "Gain" represents the gain, and the unit is dB. Among them, the beams #1, #3, #5, and #7 are the radiation beams formed by the operation of only one front face respectively, and the beams #2, #4, #6, and #8 are respectively When two adjacent fronts work at the same time, the radiation beams formed when two different adjacent fronts work at the same time. From Figure 6, it can be seen that the adjacent parts of the coverage areas of the 8 beams overlap each other, and the gain at the overlap is less than 1.5dB from the maximum gain fluctuation measured by the test, achieving a good beam overlap (better than the general situation). 3dB beam overlap required below), so as to ensure high-gain omnidirectional coverage of the azimuth plane, that is, to achieve no blind spot coverage in the horizontal range of 0°-360°.

FIG. 7 is a schematic diagram of beam scanning on the elevation plane when the directional element antenna on the next front of the array antenna works at one moment. Among them, the abscissa "Theta" represents the angle, the unit "degree" represents the degree, the ordinate "Gain" represents the gain, the unit is dB, and the "Scanning angle" represents the scanning angle. FIG. 8 is a schematic diagram of beam scanning on the elevation plane when the directional element antennas on two adjacent fronts in the array antenna work at one moment. Among them, the abscissa "Theta" represents the angle, the unit "degree" represents the degree, the ordinate "Gain" represents the gain, the unit is dB, and the "Scanning angle" represents the scanning angle.

In FIGS. 7 and 8 , the abscissa represents the elevation plane angle θ, and the ordinate represents the array antenna gain. When the beam is scanned from -30° to 30°, the gain variation of the array antenna is within 1dB. It can be seen from Fig. 7 and Fig. 8 that during the scanning process, as the effective radiation aperture of the array antenna decreases, the radiation gain can still maintain good stability.

Each embodiment in this specification focuses on the points that are different from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, this application is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

An array antenna system, comprising: an array antenna and a beam steering network;

The array antenna is an array antenna with a multi-faceted surrounding structure formed by a plurality of directional element antennas; the multi-facet is not less than 4;

The beam control network includes a plurality of switching devices; the plurality of switching devices control the directional element antenna and the combiner on any surface of the array antenna at any time during the operation of the array antenna system Signal transmission is performed between, or, signal transmission is performed between the directional element antennas on any number but not all surfaces adjacent to the control sequence and the combiner;

Wherein, one of the switching devices controls a preset number of directional element antennas in the array antenna; the multiple switching devices are in one-to-one correspondence with multiple signal transmission interfaces of the combiner.
The array antenna system according to claim 1, wherein the horizontal plane 3dB lobe width of the beam formed by any one of the directional element antennas on the horizontal plane is not less than 90 degrees.
The array antenna system according to claim 1, wherein the directional element antennas with the same relative position on each surface of the array antenna are located on the same horizontal plane.
The array antenna system according to claim 3, wherein one of the switching devices controls any one of the directional element antennas on a horizontal plane or any plurality of directional element antennas adjacent in sequence to work.
The array antenna system according to claim 3, wherein the beam steering network further comprises: a plurality of amplitude and phase control modules and a plurality of T/R components; wherein, the amplitude and phase control modules, the T/R components, the switches There is a one-to-one correspondence between the signal transmission interface of the device and the combiner; one end of the amplitude-phase control module is connected to the corresponding interface of the combiner; the other end of the amplitude-phase control module is connected to the corresponding T/R component One end of the T/R assembly is connected; the other end of the T/R assembly is connected with the corresponding switching device;

The amplitude and phase control module is used to adjust the amplitude and phase of the received signal and the transmitted signal;

The T/R component is used for switching the transceiving signal, and performing power amplification on the received signal and the transmitted signal;

Signal transmission is performed between the T/R assembly and the corresponding switching device.
The array antenna system according to claim 5, wherein the beam steering network further comprises: a plurality of band-pass filters; wherein the plurality of band-pass filters are associated with the plurality of T/R components and the The plurality of switching devices are in one-to-one correspondence; one end of the T/R assembly is connected to the corresponding amplitude-phase control module; the other end of the T/R assembly is connected to one end of the corresponding band-pass filter; The other end of the pass filter is connected with the corresponding switching device;

The band-pass filter is used to suppress interference signals other than preset frequency bands in the received signal and the transmitted signal.
The array antenna system according to claim 1, wherein the beam steering network is located in a multi-faceted surrounding structure of the array antenna.
The array antenna system according to claim 1, wherein the directional element antenna is a printed folded dipole with a U-shaped metal reflector.
The array antenna system according to claim 1, wherein the array antenna is an array antenna with a four-sided surround structure composed of a plurality of directional element antennas.
The array antenna system according to claim 9, wherein the switch device controls any one surface or any two adjacent surfaces of the array antenna at any time during the operation of the array antenna system The directional element antenna works on it.