Dual-polarized array antenna

Abstract

The present invention discloses a dual-polarization array antenna, comprising a dual-polarization antenna unit and a waveguide feeding network, wherein the dual-polarization antenna unit has a horizontal polarization end and a vertical polarization end, the horizontal polarization end is connected to a first connector, the vertical polarization end is connected to a second connector, the waveguide feeding network comprises a first waveguide tube and a second waveguide tube arranged below the dual-polarization antenna unit, a third connector is arranged on the upper side of the first waveguide tube, a fourth connector is arranged on the upper side of the second waveguide tube, the first connector and the third connector are detachably connected, and the second connector and the fourth connector are detachably connected. The antenna has the advantages of high radiation efficiency, low loss and wide working frequency band, the first waveguide tube and the second waveguide tube are coupled and outputted at the upper side, the radiation performance is highly consistent, the waveguide feeding network and the dual-polarization antenna unit are connected by the first connector, the second connector, the third connector and the fourth connector, so as to facilitate installation, disassembly and independent debugging.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a dual-polarization array antenna. Background Art

[0002] Dual-polarized phased array antennas are widely used in radar, mobile communications, remote sensing and telemetry. For radar systems, the dual-polarization working mode enables the system to provide additional polarization information parameters, which effectively improves the sensitivity of the radar system and the target detection accuracy.

[0003] Traditional dual-polarization arrays are realized by dual-polarization microstrip arrays and dual-polarization waveguide slot antennas, among which: dual-polarization microstrip arrays have the advantages of low profile and light weight, and are easy to realize dual-polarization radiation. However, when the operating frequency is high and the feed line length is long, the loss is large, and the antenna gain and efficiency are reduced. At the same time, due to the limitations of the printed circuit board processing technology, the processing size is limited and it is not suitable for forming a large array; dual-polarization waveguide slot antennas have high radiation efficiency and low loss, but due to the limitations of their structure, the spacing between adjacent antenna subarrays is large, which limits their maximum scanning angle. In addition, the two polarizations of the dual-polarization waveguide slot antenna adopt different structures and the radiation slots are not on the same plane, resulting in large differences in their radiation performance, and the structure is complex, which requires extremely high processing accuracy. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a dual-polarization array antenna, which has the advantages of high radiation efficiency, low loss and high consistency of radiation performance.

[0005] According to the dual-polarization array antenna of the first aspect embodiment of the present invention, it includes: a dual-polarization antenna unit, having a horizontal polarization end and a vertical polarization end, the horizontal polarization end is connected to a first connector, and the vertical polarization end is connected to a second connector; a waveguide feeding network, including a first waveguide tube and a second waveguide tube arranged below the dual-polarization antenna unit, a third connector is arranged on the upper side of the first waveguide tube, and a fourth connector is arranged on the upper side of the second waveguide tube; wherein the first connector is detachably connected to the third connector, and the second connector is detachably connected to the fourth connector.

[0006] The dual-polarization array antenna according to the embodiment of the present invention has at least the following beneficial effects: the dual-polarization antenna unit is provided with a horizontal polarization end and a vertical polarization end, wherein the horizontal polarization end is used to receive feed and transmit horizontal polarization signals, and the vertical polarization end is used to receive feed and transmit vertical polarization signals, corresponding waveguide signals are transmitted in the first waveguide tube and the second waveguide tube, a third connector is provided on the first waveguide tube, and the third connector can couple the waveguide signal in the first waveguide tube and convert it into a coaxial signal output, a fourth connector is provided on the second waveguide tube, and the fourth connector can couple the waveguide signal in the second waveguide tube and convert it into a coaxial signal output, the horizontal polarization end of the dual-polarization antenna unit is connected to the first connector, and the vertical polarization end is connected to the second connector, the first connector can be connected to the third connector to receive the coaxial signal of the third connector, and the second connector can be connected to The fourth connector is connected to receive the coaxial signal of the fourth connector. Through this arrangement, the connection and signal transmission of the waveguide feeding network and the dual-polarization antenna unit are realized, and the horizontal polarization end and the vertical polarization end of the dual-polarization antenna unit are both fed to realize signal radiation; the dual-polarization array antenna of the embodiment of the present invention is fed by the waveguide feeding network. Compared with the dual-polarization microstrip array antenna, it has the advantages of high radiation efficiency, low loss and wide working frequency band; and the signals of the first waveguide tube and the second waveguide tube are coupled and output with the upper side surface. Compared with the dual-polarization waveguide slot antenna, it is not necessary to open radiation slots on different surfaces of the waveguide tube, the processing accuracy requirement is low and the radiation performance consistency is high; the waveguide feeding network and the dual-polarization antenna unit are connected by the first connector, the second connector, the third connector and the fourth connector, which is convenient for installation, disassembly and independent debugging.

[0007] According to some embodiments of the present invention, the third connector includes: a third coaxial connector, the lower end of which passes through the upper side of the first waveguide and extends to the inner cavity of the first waveguide; and a third probe, the third probe is located in the inner cavity of the first waveguide and connected to the lower end of the third coaxial connector.

[0008] According to some embodiments of the present invention, the fourth connector includes: a fourth coaxial connector, the lower end of which passes through the upper side of the second waveguide and extends to the inner cavity of the second waveguide; and a fourth probe, the fourth probe being located in the inner cavity of the second waveguide and connected to the lower end of the fourth coaxial connector.

[0009] According to some embodiments of the present invention, the first waveguide tube and the second waveguide tube both extend longitudinally, and a plurality of the dual-polarized antenna units are sequentially arranged on the first waveguide tube and the second waveguide tube along the longitudinal direction to form a linear array.

[0010] According to some embodiments of the present invention, a plurality of the line arrays are arranged in sequence along a lateral direction to form a surface array.

[0011] According to some embodiments of the present invention, the dual-polarized antenna unit may be one of a microstrip antenna unit, a dual-polarized dipole unit or a dual-polarized Vivaldi antenna.

[0012] According to some embodiments of the present invention, the dual-polarized antenna unit is the microstrip antenna unit, and the first connector and the second connector are electrically connected to the microstrip line of the microstrip antenna unit, respectively.

[0013] According to some embodiments of the present invention, the first waveguide tube and the second waveguide tube have the same structure.

[0014] According to some embodiments of the present invention, a distance between left and right sides of the first waveguide tube is less than 0.25 times the wavelength.

[0015] In some embodiments of the present invention, the waveguide feeding network is a waveguide traveling wave feeding network or a waveguide standing wave feeding network.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 A schematic structural diagram of one of the linear arrays of a dual-polarized array antenna according to an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of a dual-polarized array antenna according to an embodiment of the present invention;

[0020] Figure 3 A bottom view of a microstrip antenna unit according to an embodiment of the present invention;

[0021] Figure 4 is the radiation pattern of the dual-polarized array antenna according to an embodiment of the present invention;

[0022] Figure 5 It is a structural explosion diagram of the first waveguide and the third connector according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] Dual-polarized antenna unit 100, radiation patch 110, first connector 120, second connector 130;

[0025] The waveguide feeding network 200 , the first waveguide tube 210 , the second waveguide tube 220 , the third connector 230 , the third coaxial connector 231 , the third probe 232 , the fourth connector 240 , the fourth coaxial connector 241 , and the fourth probe 242 . DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, the meaning of "plurality" is two or more, and "greater than", "less than", etc. are understood to not include the number itself. If there is a description of the first, second, third, and fourth, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference Figure 1 , the dual-polarization array antenna according to an embodiment of the present invention includes a dual-polarization antenna unit 100 and a waveguide feeding network 200.

[0031] Among them, the dual-polarized antenna unit 100 has a horizontal polarization end and a vertical polarization end, the horizontal polarization end is connected to the first connector 120, and the vertical polarization end is connected to the second connector 130; the waveguide feeding network 200 includes a first waveguide tube 210 and a second waveguide tube 220 arranged below the dual-polarized antenna unit 100, a third connector 230 is arranged on the upper side of the first waveguide tube 210, and a fourth connector 240 is arranged on the upper side of the second waveguide tube 220; the first connector 120 and the third connector 230 are detachably connected, and the second connector 130 and the fourth connector 240 are detachably connected.

[0032] The dual-polarized antenna unit 100 is provided with a horizontal polarization end and a vertical polarization end, wherein the horizontal polarization end is used to receive feed and send horizontal polarization signals, and the vertical polarization end is used to receive feed and send vertical polarization signals. Corresponding waveguide signals are transmitted in the first waveguide tube 210 and the second waveguide tube 220. A third connector 230 is provided on the first waveguide tube 210, and the third connector 230 can couple the waveguide signal in the first waveguide tube 210 and convert it into a coaxial signal output. A fourth connector 240 is provided on the second waveguide tube 220, and the fourth connector 240 can couple the waveguide signal in the second waveguide tube 220 and convert it into a coaxial signal output. The horizontal polarization end of the dual-polarized antenna unit 100 is connected to the first connector 120, and the vertical polarization end is connected to the second connector 130. The first connector 120 can be connected to the third connector 230 to receive the coaxial signal of the third connector 230, and the second The connector 130 can be connected to the fourth connector 240, so as to receive the coaxial signal of the fourth connector 240. Through such an arrangement, the connection and signal transmission between the waveguide feeding network 200 and the dual-polarized antenna unit 100 are realized, and the horizontal polarization end and the vertical polarization end of the dual-polarized antenna unit 100 are both fed to realize signal radiation. The dual-polarized array antenna of the embodiment of the present invention uses the waveguide feeding network 200 for feeding, and has the advantages of high radiation efficiency, low loss and wide working frequency band. The signals of the first waveguide tube 210 and the second waveguide tube 220 are coupled and outputted at the upper side, and there is no need to open radiation gaps on different surfaces of the waveguide tube, so the processing accuracy requirement is low and the radiation performance consistency is high. The waveguide feeding network 200 and the dual-polarized antenna unit 100 are connected by the first connector 120, the second connector 130, the third connector 230 and the fourth connector 240, which is convenient for installation, disassembly and independent debugging.

[0033] It is worth mentioning that the first connector 120, the second connector 130, the third connector 230 and the fourth connector 240 can all be RF connectors, and the connection method between RF connectors is common knowledge to those skilled in the art and will not be described in detail here.

[0034] It can be imagined that the third connector 230 includes a third coaxial connector 231 and a third probe 232, the lower end of the third coaxial connector 231 passes through the upper side of the first waveguide tube 210 and extends to the inner cavity of the first waveguide tube 210, and the third probe 232 is located in the inner cavity of the first waveguide tube 210 and connected to the lower end of the third coaxial connector 231.

[0035] Reference Figure 1As shown, the third connector 230 is the coupling output end of the first waveguide 210, and the third probe 232 is arranged in the first waveguide 210, and is coupled with the electric field in the first waveguide 210. After the third probe 232 is coupled with the electric field, an induced current is generated and output to the third coaxial connector 231, so that the horizontal polarization end of the dual-polarized antenna unit 100 is fed. Specifically, the third probe 232 is arranged in an L shape, and the L-shaped probe includes a cross bar and a vertical bar connected to each other, the vertical bar is connected to the third coaxial connector 231, and the cross bar is oriented in the left and right direction. In actual use, the cross bar is arranged parallel to the direction of the electric field in the first waveguide 210.

[0036] It is worth mentioning that the total length of the L-shaped probe can be used to adjust the output phase of the coupled output end, and the length of the crossbar can be used to adjust the output amplitude of the coupled output end.

[0037] It is conceivable that the fourth connector 240 has the same structure as the third connector 230 .

[0038] It is worth mentioning that the first connector 120 is a first coaxial connector, and the first coaxial connector can be electrically connected to the horizontal polarization end of the dual-polarization antenna unit 100 through a signal line or a probe (not shown in the figure), the first coaxial connector can be directly connected to the third coaxial connector 231 or connected through a coaxial line, the second connector 130 is a second coaxial connector, the second coaxial connector can be electrically connected to the vertical polarization end of the dual-polarization antenna unit 100 through a signal line or a probe (not shown in the figure), the second coaxial connector can be directly connected to the fourth coaxial connector 241 or connected through a coaxial line, and the way of setting a coaxial connector on the dual-polarization antenna unit 100 is common knowledge of technicians in this field and will not be repeated here.

[0039] It is conceivable that the first waveguide tube 210 and the second waveguide tube 220 both extend in the longitudinal direction, and a plurality of dual-polarized antenna units 100 are sequentially arranged in the longitudinal direction on the first waveguide tube 210 and the second waveguide tube 220 to form a linear array.

[0040] Reference Figure 2 As shown, the first waveguide tube 210 and the second waveguide tube 220 are rectangular tubes, and the longitudinal direction is the front-to-back direction. The first waveguide tube 210 and the second waveguide tube are extended in the longitudinal direction, and the first waveguide tube 210 and the second waveguide tube 220 are fitted when set, which can reduce the structure size and installation space. A plurality of dual-polarized antenna units 100 are sequentially arranged on the first waveguide tube 210 and the second waveguide tube 220 along the longitudinal direction to form a linear array, which can realize one-dimensional electronic scanning.

[0041] Specifically, refer to Figure 2 and Figure 5As shown, the third connector 230 and the fourth connector 240 are both RF connectors. Taking the first waveguide 210 as an example, the third connector 230 includes a third coaxial connector 231 and a third probe 232. The third probe 232 is an L-shaped probe. The third coaxial connector 231 is arranged on the upper side of the first waveguide 210. The third probe 232 is arranged in the inner cavity of the first waveguide 220 and connected to the lower end of the third coaxial connector 231. The third probe 232 includes a cross bar and a vertical bar connected to each other. The vertical bar is connected to the third coaxial connector 231. The crossbar is oriented in the left-right direction. In actual use, the crossbar is arranged parallel to the direction of the electric field in the first waveguide 210. The crossbars of the two adjacent third probes 232 on the first waveguide 230 are oriented in opposite directions. By oriented the crossbars of the two adjacent third probes 232 in opposite directions, a 180° phase difference is introduced between the two adjacent coupled output ports. In addition to the spatial phase difference between the two adjacent output ports, the spatial phase difference is about 180°, which corresponds to λg / 2, so that the output phase is close to the same phase or has a small phase difference. The fourth connector 240 is arranged in the same manner as the third connector 230.

[0042] It is worth mentioning that the coupling power amplitude of each coupling output port can be calculated according to the required Taylor window function distribution, so that each third connector 230 can be set on the first waveguide tube 210 according to the coupling power amplitude, and each fourth connector 240 can be set on the second waveguide tube 220 according to the coupling power amplitude.

[0043] It is conceivable that a plurality of line arrays are arranged in sequence along the lateral direction to form a surface array.

[0044] Reference Figure 2 As shown, the first waveguide tube 210 and the second waveguide tube 220 are both rectangular tubes, and the transverse direction is the left-right direction. A plurality of line arrays are arranged in sequence along the left-right direction to form a surface array. The surface array can realize electric scanning of a two-dimensional plane, thereby increasing the scanning range and angle. Moreover, because each of the first waveguide tubes 210 and the second waveguide tubes 220 constituting the line array are coupled output at the upper side, the two adjacent surfaces of the first waveguide tube 210 and the second waveguide tube 220 of each line array can be arranged to fit together, so that the space occupied by each line array is reduced, and the distance between two adjacent line arrays can be set small enough to obtain a larger scanning angle.

[0045] Furthermore, the upper side surfaces of the first waveguide tube 210 and the second waveguide tube 220 are both narrow surfaces. By performing coupling output on the narrow surfaces of the first waveguide tube 210 and the second waveguide tube 220, the distance between two adjacent linear arrays can be further reduced.

[0046] It is conceivable that the dual-polarized antenna unit may be one of a microstrip antenna unit, a dual-polarized dipole unit or a dual-polarized vivaldi antenna.

[0047] The microstrip antenna unit, the dual-polarization dipole unit and the dual-polarization vivaldi all have a horizontal polarization end and a vertical polarization end, which facilitates the dual polarization of the antenna array.

[0048] It is conceivable that the dual-polarized antenna unit 100 is a microstrip antenna unit, and the first connector 120 and the second connector 130 are electrically connected to the microstrip lines of the microstrip antenna unit respectively.

[0049] like Figures 1 to 3 As shown, the top layer of the microstrip antenna unit is a radiation patch 110, and the bottom layer is a microstrip line. The microstrip line includes a microstrip line for transmitting horizontal polarization signals and a microstrip line for transmitting vertical polarization signals. The microstrip line for transmitting horizontal polarization signals is connected to the horizontal polarization end, i.e., the first end of the first connector 120, and the microstrip line for transmitting vertical polarization signals is connected to the vertical polarization end, i.e., the first end of the second connector 130. The second end of the first connector 120 is connected to the third connector 230, and the second end of the second connector 130 is connected to the fourth connector 240. The first connector 120 and the second connector 130 are respectively connected to the corresponding microstrip lines. The horizontal polarization end and the vertical polarization end of the microstrip antenna unit share a radiation patch 110 to achieve common aperture radiation, high space utilization, and can reduce the volume and weight of the antenna. Moreover, the horizontal polarization end and the vertical polarization end share a radiation patch 110, which can effectively reduce the spacing between adjacent line arrays, thereby achieving a larger scanning angle. In addition, the microstrip antenna unit has the advantages of low profile, easy to achieve dual polarization, low cost and high processing accuracy.

[0050] It is conceivable that the first waveguide 210 and the second waveguide 220 have the same structure.

[0051] The first waveguide tube 210 and the second waveguide tube 220 adopt the same structure, which further ensures the consistency of the radiation performance of the first waveguide tube 210 and the second waveguide tube 220, and does not need to process different waveguide tubes separately, effectively reducing the processing difficulty.

[0052] It is conceivable that the distance between the left and right sides of the first waveguide 210 is less than 0.25 times the wavelength.

[0053] The first waveguide tube 210 and the second waveguide tube 220 have the same structure, and the left and right sides of the first waveguide tube 210 are set to be less than 0.25 times the wavelength, so that the width of the first waveguide tube 210 and the second waveguide tube 220 after being closely attached does not exceed 0.5 times the wavelength. A plurality of dual-polarized antenna units 100 are sequentially arranged on the first waveguide tube 210 and the second waveguide tube 220 to form a linear array, and then the plurality of linear arrays form a planar array. Since the width of each linear array does not exceed 0.5 times the wavelength, the spacing between the linear arrays can be set small enough to achieve scanning at a larger angle.

[0054] It is worth mentioning that the wavelength is defined as the ratio of the speed of light in a vacuum to the operating frequency of the dual-polarization array antenna.

[0055] It is conceivable that the waveguide feeding network 200 is a waveguide traveling wave feeding network or a waveguide standing wave feeding network.

[0056] At the same size, the efficiency of the waveguide traveling wave feeding network is worse than that of the waveguide standing wave feeding network, but the waveguide standing wave feeding network has a narrow bandwidth when it is large in size, so it is suitable for small array antennas. The waveguide traveling wave feeding network can maintain a wider bandwidth when it is large in size. When the waveguide traveling wave feeding network is used to form a large antenna array, the multiple coupled output ports arranged on it output the signal to the antenna unit, reducing the signal loss in the waveguide tube and improving the efficiency. Therefore, the waveguide traveling wave feeding network is suitable for forming a large array antenna.

[0057] According to the above embodiment of the present invention, a C-band dual-polarization array antenna is designed. The array antenna is described below with reference to a specific embodiment.

[0058] The dual-polarized antenna unit 100 of the array antenna is a microstrip antenna unit, a dielectric plate is arranged in the microstrip antenna unit, the thickness of the dielectric plate is 1.5 mm, the relative dielectric constant of the dielectric plate is 3.66, the length and width of the dielectric plate are both 29 mm, the spacing between the first connector 120 and the second connector 130 is 12 mm, the waveguide feeding network 200 is a waveguide traveling wave feeding network, the spacing between the left and right sides of the first waveguide tube 210 is 12 mm, and 32 coupling output ends are arranged on the first waveguide tube 210 in the front-to-back direction, the spacing between each coupling output end is 35 mm, and the power of the 32 coupling output ends is distributed according to Taylor weighting, the second waveguide tube 220 has the same structure as the first waveguide tube 210, the first waveguide tube 210 and the second waveguide tube 220 feed the 32 microstrip antenna units through corresponding connectors to form a linear array, and the 8 linear arrays are arranged in sequence in the left and right directions to form a planar array.

[0059] Reference Figure 4As shown, the horizontal polarization direction and the vertical polarization direction of the dual-polarization antenna array are highly consistent, which is due to the fact that the first waveguide 210 and the second waveguide 220 are of exactly the same structure, the coupled output ends are on the same plane, and the dual-polarization antenna unit 100 radiates in the same aperture.

[0060] It is worth mentioning that the first connector 120, the second connector 130, the third connector 230 and the fourth connector 240 of the above-mentioned embodiment of the present invention can be specifically SMP connectors or SMA connectors. In addition, one of the two ends in the front-to-back direction of the first waveguide tube 210 is connected to an antenna feed source (not shown in the figure), and the other end is connected to a waveguide load (not shown in the figure). The second waveguide tube 220 is the same as the first waveguide tube 210.

[0061] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A dual-polarized array antenna, It is characterized in that include: A dual-polarized antenna unit, having a horizontal polarization end and a vertical polarization end, wherein the horizontal polarization end is connected to a first connector, and the vertical polarization end is connected to a second connector; A waveguide feeding network, comprising a first waveguide tube and a second waveguide tube arranged below the dual-polarized antenna unit, a third connector being arranged on the upper side of the first waveguide tube, and a fourth connector being arranged on the upper side of the second waveguide tube; the upper side surfaces of the first waveguide tube and the second waveguide tube are both narrow surfaces, the opposite surfaces of the first waveguide tube and the second waveguide tube are in contact with each other, a plurality of the dual-polarized antenna units are sequentially arranged on the first waveguide tube and the second waveguide tube along the longitudinal direction; the spacing between the left and right sides of the first waveguide tube is less than 0.25 times the wavelength; The third connector comprises: a third coaxial connector, the lower end of which passes through the upper side of the first waveguide and extends to the inner cavity of the first waveguide; a third probe, which is located in the inner cavity of the first waveguide and connected to the lower end of the third coaxial connector; the third probe is arranged in an L shape, including a cross bar and a vertical bar connected to each other, the vertical bar is connected to the third coaxial connector, and the cross bar is parallel to the direction of the electric field in the first waveguide; The first connector is detachably connected to the third connector, and the second connector is detachably connected to the fourth connector.

2. The dual-polarization array antenna according to claim 1, It is characterized in that The fourth connector comprises: a fourth coaxial connector, the lower end of which passes through the upper side of the second waveguide and extends toward the inner cavity of the second waveguide; A fourth probe is located in the inner cavity of the second waveguide and connected to the lower end of the fourth coaxial connector.

3. The dual-polarization array antenna according to claim 1, Features: The first waveguide tube and the second waveguide tube both extend in the longitudinal direction, and a plurality of dual-polarization antenna units are sequentially arranged on the first waveguide tube and the second waveguide tube along the longitudinal direction to form a linear array.

4. The dual-polarization array antenna according to claim 3, Features: The plurality of line arrays are arranged in sequence along the lateral direction to form a surface array.

5. The dual-polarized array antenna according to any one of claims 1 to 4, Features: The dual-polarized antenna unit may be one of a microstrip antenna unit, a dual-polarized dipole unit or a dual-polarized Vivaldi antenna.

6. The dual-polarization array antenna according to claim 5, It is characterized in that The dual-polarized antenna unit is the microstrip antenna unit, and the first connector and the second connector are electrically connected to the microstrip line of the microstrip antenna unit respectively.

7. The dual-polarized array antenna according to any one of claims 1 to 4, Features: The first waveguide and the second waveguide have the same structure.

8. The dual-polarized array antenna according to any one of claims 1 to 4, Features: The waveguide feeding network is a waveguide traveling wave feeding network or a waveguide standing wave feeding network.

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