Dual-mode portable secondary radar phase scanning antenna structure and device

Abstract

The invention relates to the technical field of secondary radars, and discloses a dual-mode portable secondary radar phase scanning antenna structure and device.The dual-mode portable secondary radar phase scanning antenna structure comprises a main antenna module and an auxiliary antenna module detachably connected with the main antenna module, the 2M first antenna units are respectively connected to first ends of two 1: M first power dividers through first phase shifters, and second ends of the two first power dividers are connected to a first beam forming network or a second beam forming network through cables. The first antenna unit located in the middle is connected to the first beam forming network or the second beam forming network through the corresponding first phase shifters and cables in sequence. The auxiliary antenna module comprises N second antenna units, the N second antenna units are connected to the third end of a 1: N second power divider through corresponding second phase shifters, and the fourth end of the second power divider is connected to the second beam forming network through a cable. The portable electronic device has better portability.

Description

Technical Field

[0001] The present invention relates to the technical field of secondary radar, and in particular to a dual-mode portable secondary radar phase-scanning antenna structure and device. Background Art

[0002] Secondary radar transmits a 1030MHz interrogation signal to an aerial target through a ground interrogator. The aerial target equipped with a transponder receives the interrogation signal and returns a 1090MHz reply signal. The ground interrogator then receives the reply signal to detect and identify the target's direction and distance.

[0003] The antenna is crucial to the secondary radar system. The area of ​​the antenna is related to the antenna gain, which affects the power of the secondary radar system. The aperture of the secondary antenna, that is, the horizontal width, determines the angular measurement accuracy of the secondary radar.

[0004] Secondary radar is usually installed together with primary radar. Since secondary radar works in interrogation and response mode, the interrogation antenna gain is usually smaller than that of primary radar. Secondary radar antenna is usually installed parasitically on top of primary radar antenna. Therefore, the antenna of secondary radar is required to be miniaturized and lightweight.

[0005] The secondary radar system is small and low in cost. Some small airport emergency air traffic control require a miniaturized portable secondary radar system. However, traditional phased array radars are generally installed at fixed stations or on vehicles due to their complex systems. The antennas are large in size and weight, and do not meet the requirements of small secondary radar systems.

[0006] Traditional phased array secondary radar antennas have the following main problems:

[0007] Generally, they are installed at fixed stations or on vehicles, and the antennas are large in size and weight;

[0008] Small-aperture phased array antennas have wide beams and poor angle measurement accuracy. Summary of the invention

[0009] In view of some background and usage requirements of existing secondary radar phased array antennas, the present invention provides a dual-mode portable secondary radar phased array antenna structure and device. In a miniaturized secondary radar system, none of the existing conventional secondary radar phased array antennas can meet the requirements of miniaturization, portability and performance indicators.

[0010] The present invention is achieved through the following technical solutions:

[0011] A dual-mode portable secondary radar phase-scanning antenna structure comprises a main antenna module and two auxiliary antenna modules detachably connected to the main antenna module, wherein:

[0012] The main antenna module includes 2M+1 first antenna units, wherein the M first antenna units at both ends are respectively connected to the first ends of two 1:M first power dividers through corresponding first phase shifters, the second ends of the two first power dividers are connected to the first beam forming network or the second beam forming network through cables, and the other first antenna unit located in the middle is sequentially connected to the first beam forming network or the second beam forming network through the corresponding first phase shifter and cable, the first power divider has M first ends and one second end, and the distribution ratio of one second end to the M first ends is different. When connected with the M first antenna units, the closer the first antenna unit is to the middle position, the greater the distribution ratio of the first end of the corresponding first power divider is;

[0013] The secondary antenna module includes N second antenna units, and the N second antenna units are respectively connected to the third end of the 1:N second power divider through corresponding second phase shifters. The fourth end of the second power divider is connected to the second beam forming network through a cable, and the second power divider has N third ends and one fourth end.

[0014] As an optimization, the first phase shifter and the second phase shifter are the same phase shifter.

[0015] As an optimization, the number of the secondary antenna modules is two.

[0016] As an optimization, when the main antenna module and the secondary antenna module are connected together, 2M+1 of the first antenna units and 2N of the second antenna units form a common array antenna to work.

[0017] As an optimization, the first beam forming network includes a first coupler and a second coupler, the second ends of the two first 1:M power dividers in the main antenna module are respectively connected to the A end and the B end of the first coupler of the first beam forming network, and the first antenna unit located in the middle position of the main antenna module is connected to the C end of the first beam forming network through the first phase shifter;

[0018] The second beam forming network is used in the narrow beam mode. In the narrow beam mode, the first beam forming network is removed and the second beam forming network is installed. The second beam forming network includes a third coupler, a fourth coupler, a 1:2 third power divider and a 1:2 fourth power divider, wherein the second ends of the two first power dividers are respectively connected to the G1 end and the G2 end of the third power divider, the fourth ends of the second power dividers in the two secondary antenna modules are respectively connected to the H1 end and the H2 end of the fourth power divider, the first antenna unit located in the middle is connected to the I port of the fourth coupler, and the third power divider and the fourth power divider are exactly the same, both of which are unequal distribution ratio power dividers, wherein the distribution ratio of the G2 end is greater than the distribution ratio of the G1 end, and the distribution ratio of the H2 end is greater than the distribution ratio of the H1 end.

[0019] The present invention also discloses a dual-mode portable secondary radar phase-scanning antenna device, which is used to install the aforementioned dual-mode portable secondary radar phase-scanning antenna structure, including:

[0020] A first substrate for mounting the main antenna module, wherein a first antenna unit is mounted on a first surface of the first substrate, and a first mounting box for accommodating a first phase shifter and a first power divider is mounted on a second surface of the first substrate; and a connection structure detachably connected to a first beamforming network or a second beamforming network is also provided on the first substrate;

[0021] A second substrate for mounting the secondary antenna module, wherein a second antenna unit is mounted on a third surface of the second substrate, and a second mounting box for accommodating a second phase shifter and a second power divider is mounted on a fourth surface of the second substrate;

[0022] The first substrate and the second substrate are detachably connected via a connecting structure.

[0023] As an optimization, the distance between two adjacent first antenna units is the same as the distance between two adjacent second antenna units, and along the direction in which several first antenna units are arranged, the closest distance from the first antenna unit located at the edge to the side of the first substrate is half of the distance between two adjacent first antenna units; along the direction in which several second antenna units are arranged, the closest distance from the second antenna unit located at the edge to the side of the second substrate is half of the distance between two adjacent second antenna units.

[0024] As an optimization, two sides of the first substrate in the arrangement direction of the first antenna units are provided with jacks, and one side of the second substrate in the arrangement direction of the second antenna units is provided with a plug matching the jacks, or,

[0025] Plugs are provided on two side surfaces of the first substrate in the arrangement direction of the first antenna units, and a socket matching the plugs is provided on one side surface of the second substrate in the arrangement direction of the second antenna units.

[0026] As an optimization, the connecting structure is a connecting buckle, one end of which is installed on the second surface close to the first substrate on the side where the first antenna units are arranged, and the other end of the connecting buckle is installed on the fourth surface close to the second substrate on the side where a socket or a plug is provided.

[0027] As an optimization, the connection structure includes a slot, the first beam forming network and the second beam forming network are respectively arranged in corresponding box bodies, and the box body is provided with an insert block matching the slot, and the slot and the insert block are detachably connected.

[0028] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0029] The present invention mainly provides a miniaturized, high-performance, portable and scalable dual-mode portable secondary radar phased array antenna, which has the following effects:

[0030] 1) The narrow beam mode has high performance parameter indicators and can be used as a supplement to important flight support or as an independent high-performance secondary radar system;

[0031] 2) The wide beam mode has a smaller size, and the detachable connection structure makes the device of the present invention more portable and can be used as a highly mobile backpack temporary station;

[0032] 3) The two modes are easy to switch and can be easily switched according to user needs;

[0033] 4) The performance of portable high-mobility radar can also be improved by installing expansion components. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0035] Figure 1 This is a block diagram of the azimuth wide beam mode principle of the dual-mode portable secondary radar phased array antenna;

[0036] Figure 2 This is a principle block diagram of the azimuth narrow beam mode of the dual-mode portable secondary radar phased array antenna;

[0037] Figure 3 is an assembly diagram of the device of the present invention (including the second beamforming network);

[0038] Figure 4 It is a schematic diagram of the narrow beam mode in the azimuth plane radiation pattern (1.06GHz) of the dual-mode portable secondary radar phased array antenna;

[0039] Figure 5 It is a schematic diagram of the wide beam mode in the azimuth plane radiation pattern (1.06GHz) of the dual-mode portable secondary radar phased array antenna;

[0040] Figure 6 is a schematic diagram of the structure of a first beamforming network;

[0041] Figure 7 FIG. 4 is a schematic diagram of the structure of a second beamforming network.

[0042] Marks and corresponding parts names in the attached drawings:

[0043] 1-main antenna module, 1a-first antenna unit, 1b-first phase shifter, 1c-first power divider, 2-first beam forming network, 3-secondary antenna module, 3a-second antenna unit, 4-second beam forming network, 5-first substrate, 6-first mounting box, 7-second substrate, 8-second mounting box. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0045] This embodiment 1 provides a dual-mode portable secondary radar phase-scanning antenna structure, such as Figure 1-Figure 2 As shown, it includes a main antenna module 1 and a secondary antenna module detachably connected to the main antenna module 1, wherein:

[0046] The main antenna module 1 includes 2M+1 first antenna units 1a, wherein the M first antenna units 1a at both ends are respectively connected to the first ends of two 1:M first power dividers 1c through corresponding first phase shifters 1b, the second ends of the two first power dividers 1c are connected to the first beam forming network 2 or the second beam forming network 4 through cables, and another first antenna unit 1a is connected to the first beam forming network 2 or the second beam forming network 4 through the corresponding first phase shifter 1b and the cable in turn, the first power divider 1c has M first ends and one second end, and the distribution ratio from one second end to the M first ends is different. When connected with the M first antenna units, the closer the first antenna unit is to the middle position, the greater the distribution ratio of the first end of the corresponding first power divider is;

[0047] The secondary antenna module 3 includes N second antenna units 3a, and the N second antenna units 3a are respectively connected to the third end of the 1:N second power divider through corresponding second phase shifters. The fourth end of the second power divider is connected to the second beam forming network 4 through a cable. The second power divider has N third ends and one fourth end.

[0048] In the main antenna module 1, one group of M first antenna units 1a is connected to the first end of a first power divider 1c by respectively connecting a first phase shifter 1b in series, another group of M first antenna units 1a is connected to the first end of another first power divider 1c by respectively connecting a first phase shifter 1b in series, and the second ends of the two first power dividers 1c and the remaining first antenna unit 1a, which is individually connected in series with a first phase shifter 1b, are all connected to the first beamforming network 2 or the second beamforming network through wires.

[0049] In the secondary antenna module 3, one group of N second antenna units 3a is connected to the third end of a second power divider by respectively connecting a second phase shifter in series, and another group of N second antenna units 3a is connected to the third end of another second power divider by respectively connecting a second phase shifter in series, and the fourth ends of the two second power dividers are connected to the second beam forming network 4 through wires.

[0050] In this embodiment, the first phase shifter and the second phase shifter are the same phase shifter. When the main antenna module 1 and the secondary antenna module 3 are connected together, 2M+1 first antenna units 1a and 2N second antenna units 3a form a common array antenna to work.

[0051] N and M can be set according to actual conditions. Therefore, through the antenna structure of the present invention, a working mode within any beam range can be achieved in theory.

[0052] That is to say, after the main antenna module 1 and the auxiliary antenna module 3 are assembled, an integral antenna module is formed, and the integral antenna module includes the first antenna unit 1a and the second antenna unit 3a arranged in the form of an array antenna.

[0053] In some embodiments, the number of the secondary antenna modules 3 is two.

[0054] That is to say, when a narrow beam working mode is required, the two auxiliary antenna modules 3 can be connected to the main antenna module 1 according to actual needs.

[0055] Here, the main antenna module mainly includes a first antenna unit, a first phase shifter, and a first power divider.

[0056] The secondary antenna module mainly includes a second antenna unit, a second phase shifter, and a second power divider.

[0057] The first beam forming network is only connected to the main antenna module, and the second beam forming network is connected to both the main antenna module and the auxiliary antenna module.

[0058] In some embodiments, the first beam forming network includes a first coupler and a second coupler, the second ends of the two first 1:M power dividers in the main antenna module are respectively connected to the A end and the B end of the first coupler of the first beam forming network, and the first antenna unit located in the middle position of the main antenna module is connected to the C end of the first beam forming network through the first phase shifter;

[0059] The second beam forming network is used in narrow beam mode. In narrow beam mode, the first beam forming network is removed and the second beam forming network is installed. The second beam forming network includes a third coupler, a fourth coupler, a 1:2 third power divider and a 1:2 fourth power divider, wherein the second ends of the two first power dividers are respectively connected to the G1 end and the G2 end of the third power divider, the fourth ends of the second power dividers in the two secondary antenna modules are respectively connected to the H1 end and the H2 end of the fourth power divider, the first antenna unit located in the middle is connected to the I port of the fourth coupler, the first antenna unit located in the middle is connected to the I port of the fourth coupler, and the third power divider and the fourth power divider are exactly the same, both are unequal distribution ratio power dividers, wherein the distribution ratio of the G2 end is greater than the distribution ratio of the G1 end, and the distribution ratio of the H2 end is greater than the distribution ratio of the H1 end.

[0060] That is to say, in view of the fact that the existing secondary phased array antenna introduced in the background technology cannot meet the use requirements of the small secondary radar system, Example 1 designs a dual-mode portable secondary radar phase-scanning antenna structure. The design realizes the switching of the two working modes of wide beam and narrow beam in azimuth by adding a secondary antenna module 3 to the main antenna module and switching between the first beamforming network and the second beamforming network. The implementation steps are as follows:

[0061] Step 1: Assemble the antenna module through building block combination to achieve two forms: wide beam small aperture phase scan antenna and narrow beam large aperture antenna. The assembly principle block diagrams are as follows: Figure 1 shown.

[0062] Step 2: 1 is a main antenna module 1, comprising 2M+1 first antenna units 1a, each first antenna unit 1a is connected to a phase shifter, the four first antenna units 1a on the left and the four first antenna units 1a on the right are respectively connected to the 1:M first power divider 1c, and the first antenna unit 1a in the middle is respectively connected to the first beam forming network 2 through three mixed cables to form a wide beam working mode beam forming network, thereby forming three beams of sum, difference and control;

[0063] Step 3: The main antenna module 1 is also equipped with two auxiliary antenna modules 3 that can be installed. Each auxiliary antenna module 3 includes N second antenna units 3a, N second phase shifters and a 1:N power divider beam forming network. The two auxiliary antenna modules 3 are installed on the left and right sides of the main antenna module 1 respectively, and the first beam forming network is replaced with the second beam forming network, thereby replacing the first beam forming network 2 corresponding to the wide beam mode with the second beam forming network 4 corresponding to the narrow beam to complete the switching of the azimuth narrow beam mode.

[0064] Step 4: When using a wide beam, Figure 1 As shown, the antenna array is a 2M+1 first antenna unit 1a array, which is composed of two 1:M first power dividers 1c and 2M+1 first phase shifters 1b; it is connected to the first beam forming network 2 through a cable to form a beam forming network wide beam working mode;

[0065] Step 5: When using a narrow beam, such as Figure 2 As shown, the main antenna module 1 is equipped with two secondary antenna modules 3, the antenna array is 2M+2N+1 arrays, and the antenna is composed of two 1:N power dividers and one 1:M power divider, and 2M+2N+1 phase shifters. The main antenna module 1 and the two secondary antenna modules 3 are respectively connected to the first beamforming network 2 and the second beamforming network through cables to form a second beamforming network. Figure 2 The main antenna module and the auxiliary antenna module are connected together in a second beam forming network.

[0066] According to the above steps, two modes of portable phased array secondary radar antenna can be realized. When M=4, N=4, its main performance indicators are as follows.

[0067] 1) Operating frequency: 0.99GHz~1.13GHz

[0068] 2) Polarization: vertical polarization

[0069] 3) Voltage standing wave ratio: <2.0

[0070] 4) Azimuth scanning range: -60°~60°;

[0071] 5) Normal gain: 12.7dBi (1.06GHz, wide beam mode), 15dBi (1.06GHz, narrow beam mode);

[0072] The system block diagram of the dual-mode portable secondary radar phased array antenna designed by the present invention is as follows: Figure 1 As shown in the figure, the performance index diagrams are Figure 4 , Figure 5 shown.

[0073] Embodiment 2 discloses a dual-mode portable secondary radar phase-scanning antenna device, which is used to install a dual-mode portable secondary radar phase-scanning antenna structure described in Embodiment 1, including:

[0074] a first substrate 5 for mounting the main antenna module 1, wherein a first antenna unit 1a is mounted on a first surface of the first substrate 5, and a first mounting box 6 for accommodating a first phase shifter 1b, a first power divider 1c and a first beam forming network 2 is mounted on a second surface of the first substrate 5; and a connection structure detachably connected to the first beam forming network or the second beam forming network is also provided on the first substrate;

[0075] A second substrate 7 for mounting the secondary antenna module 3, wherein a second antenna unit 3a is mounted on a third surface of the second substrate 7, and a second mounting box 8 for accommodating a second phase shifter and a second power divider is mounted on a fourth surface of the second substrate 7;

[0076] Furthermore, the first substrate 5 and the second substrate 7 are detachably connected via a connecting structure.

[0077] Structural assembly diagram Figure 3 From top to bottom are the front view, top view, 180° flip view of the front view and bottom view.

[0078] When only the main antenna module 1 is provided, the first antenna unit 1a, the first power divider 1c, the first phase shifter 1b and the first beam forming network 2 together form a beam forming network in a wide beam working mode.

[0079] In some embodiments, the distance between two adjacent first antenna units 1a is the same as the distance between two adjacent second antenna units 3a. That is, along the direction in which the first antenna units 1a are arranged, the closest distance from the first antenna unit 1a located at the edge to the side of the first substrate 5 is half of the distance between two adjacent first antenna units 1a; along the direction in which the second antenna units 3a are arranged, the closest distance from the second antenna unit 3a located at the edge to the side of the second substrate 7 is half of the distance between two adjacent second antenna units 3a.

[0080] An array antenna is an antenna system composed of many identical single antennas (such as symmetrical antennas) arranged in a certain pattern, also known as an antenna array. The independent units that make up the antenna array are called array elements or antenna units. If the array elements are arranged in a straight line or a plane, it is called a linear array or a plane array. In this embodiment, the array elements are arranged in a straight line.

[0081] In some embodiments, the first substrate 5 is provided with jacks on two sides located in the arrangement direction of the first antenna units 1a, and the second substrate 7 is provided with a plug matching the jacks on one side located in the arrangement direction of the second antenna units 3a.

[0082] Alternatively, plugs are provided on two sides of the first substrate 5 in the arrangement direction of the first antenna units 1a, and a socket matching the plugs is provided on one side of the second substrate 7 in the arrangement direction of the second antenna units 3a.

[0083] In this way, when the main antenna module 1 and the auxiliary antenna module 3 are assembled together, the plug is inserted into the jack, so that the first beamforming network 2 and the second beamforming network become an integrated beamforming network (the third beamforming network 4). This integrated beamforming network and the first antenna unit 1a, the second antenna unit 3a, the first phase shifter 1b, the second phase shifter, the first power divider 1c, and the second power divider together form a beamforming network in a narrow beam working mode.

[0084] It should be noted that the installation position of the jack or plug on the second substrate 7 can be set according to actual conditions, for example, Figure 2 , 3 In the embodiment, it can be arranged on the left side of the second substrate 7 or on the right side of the second substrate 7 . In short, it can be matched with the plug or the socket on the first substrate 5 .

[0085] In some embodiments, the connecting structure is a connecting buckle, one end of which is mounted on a second surface close to the first substrate 5 on the side where the first antenna units 1a are arranged, and the other end of the connecting buckle is mounted on a fourth surface close to the second substrate 7 on the side where a socket or plug is provided.

[0086] The connection structure includes a slot, the first beam forming network and the second beam forming network are respectively arranged in corresponding box bodies, and an inserting block matching the slot is arranged on the box body, and the slot and the inserting block are detachably connected.

[0087] In the wide beam mode, the plug on the box of the first beam forming network is connected to the slot. When it is necessary to change to the narrow beam mode, the box of the first beam forming network is removed, and then the plug on the box of the second beam forming network is connected to the slot.

[0088] In order to make the first substrate 5 and the second substrate 7 more fixed after being combined together, a connecting buckle is set on the surface of the first substrate 5 and the second substrate 7. Here, the connecting buckle can include a long hard material structure, one end of which is hinged on the first substrate 5 or the second substrate 7, and the other end is fixedly connected to the fixed end with a slot structure on the substrate without the long hard material structure. Of course, other existing connecting buckle structures can also be used, which will not be described in detail here.

[0089] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dual-mode portable secondary radar phase-scanning antenna structure, characterized in that: It includes a main antenna module and two auxiliary antenna modules detachably connected to the main antenna module, wherein: The main antenna module includes 2M+1 first antenna units, wherein the M first antenna units at both ends are respectively connected to the first ends of two 1:M first power dividers through corresponding first phase shifters, the second ends of the two first power dividers are connected to the first beam forming network or the second beam forming network through cables, and the other first antenna unit located in the middle is sequentially connected to the first beam forming network or the second beam forming network through the corresponding first phase shifter and cable, the first power divider has M first ends and one second end, and the distribution ratio of one second end to the M first ends is different. When connected with the M first antenna units, the closer the first antenna unit is to the middle position, the greater the distribution ratio of the first end of the corresponding first power divider is; The secondary antenna module includes N second antenna units, and the N second antenna units are respectively connected to the third end of the 1:N second power divider through corresponding second phase shifters. The fourth end of the second power divider is connected to the second beam forming network through a cable, and the second power divider has N third ends and one fourth end.

2. A dual-mode portable secondary radar phase-scanning antenna structure according to claim 1, characterized in that: The first phase shifter and the second phase shifter are the same phase shifter.

3. A dual-mode portable secondary radar phase-scanning antenna structure according to claim 1, characterized in that: The number of the secondary antenna modules is two.

4. A dual-mode portable secondary radar phase-scanning antenna structure according to claim 1, characterized in that: When the main antenna module and the auxiliary antenna module are connected together, 2M+1 of the first antenna units and 2N of the second antenna units form a common array antenna to work.

5. The dual-mode portable secondary radar phase-scanning antenna structure according to claim 1, characterized in that: The first beam forming network includes a first coupler and a second coupler, the second ends of the two first 1:M power dividers in the main antenna module are respectively connected to the A end and the B end of the first coupler of the first beam forming network, and the first antenna unit located in the middle position of the main antenna module is connected to the C end of the first beam forming network through the first phase shifter; The second beam forming network is used in the narrow beam mode. In the narrow beam mode, the first beam forming network is removed and the second beam forming network is installed. The second beam forming network includes a third coupler, a fourth coupler, a 1:2 third power divider and a 1:2 fourth power divider, wherein the second ends of the two first power dividers are respectively connected to the G1 end and the G2 end of the third power divider, and the fourth ends of the second power dividers in the two secondary antenna modules are respectively connected to the H1 end and the H2 end of the fourth power divider, and the third power divider and the fourth power divider are exactly the same, and are both unequal distribution ratio power dividers, wherein the distribution ratio of the G2 end is greater than the distribution ratio of the G1 end, and the distribution ratio of the H2 end is greater than the distribution ratio of the H1 end.

6. A dual-mode portable secondary radar phase-scanning antenna device, used for installing a dual-mode portable secondary radar phase-scanning antenna structure according to any one of claims 1 to 5, characterized in that: include: A first substrate for mounting the main antenna module, wherein a first antenna unit is mounted on a first surface of the first substrate, and a first mounting box for accommodating a first phase shifter and a first power divider is mounted on a second surface of the first substrate; and a connection structure detachably connected to a first beamforming network or a second beamforming network is also provided on the first substrate; A second substrate for mounting the secondary antenna module, wherein a second antenna unit is mounted on a third surface of the second substrate, and a second mounting box for accommodating a second phase shifter and a second power divider is mounted on a fourth surface of the second substrate; The first substrate and the second substrate are detachably connected via a connecting structure.

7. A dual-mode portable secondary radar phase-scanning antenna device according to claim 6, characterized in that: The distance between two adjacent first antenna units is the same as the distance between two adjacent second antenna units. Along the direction in which the first antenna units are arranged, the closest distance from the first antenna unit located at the edge to the side edge of the first substrate is half of the distance between two adjacent first antenna units; along the direction in which the second antenna units are arranged, the closest distance from the second antenna unit located at the edge to the side edge of the second substrate is half of the distance between two adjacent second antenna units.

8. A dual-mode portable secondary radar phase-scanning antenna device according to claim 7, characterized in that: The first substrate is provided with jacks on two sides thereof in the arrangement direction of the first antenna units, and the second substrate is provided with a plug matching the jacks on one side thereof in the arrangement direction of the second antenna units, or, Plugs are provided on two side surfaces of the first substrate in the arrangement direction of the first antenna units, and a socket matching the plugs is provided on one side surface of the second substrate in the arrangement direction of the second antenna units.

9. A dual-mode portable secondary radar phase-scanning antenna device according to claim 8, characterized in that: The connecting structure is a connecting buckle, one end of which is installed on the second surface close to the first substrate on the side where the first antenna units are arranged, and the other end of the connecting buckle is installed on the fourth surface close to the side where a socket or a plug is provided.

10. A dual-mode portable secondary radar phase-scanning antenna device according to claim 6, characterized in that: The connection structure includes a slot, the first beam forming network and the second beam forming network are respectively arranged in corresponding box bodies, and an inserting block matching the slot is arranged on the box body, and the slot and the inserting block are detachably connected.

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