Millimeter wave dual-polarized ridge waveguide slot antenna

Abstract

The application discloses a kind of millimeter wave dual polarization ridge waveguide slot antennas, including radar system main body, multiple horizontal polarization units are sequentially arranged and installed in one end of radar system main body, it is configured as outward radiation or receiving along the horizontal polarization electromagnetic wave of first direction, first conjugate slot is arranged between adjacent horizontal polarization units, to reduce the mutual interference in the process of horizontal polarization electromagnetic wave radiation;Multiple vertical polarization units are sequentially arranged and installed in the other end of radar system main body, it is configured as outward radiation or receiving along the vertical polarization electromagnetic wave of second direction perpendicular to first direction, second conjugate slot is arranged between adjacent vertical polarization units, to reduce the mutual interference in the process of vertical polarization electromagnetic wave radiation;Multiple connectors are respectively installed in multiple horizontal polarization units and multiple vertical polarization units, configured as emitting electromagnetic wave or receiving electromagnetic wave from multiple horizontal polarization units and / or multiple vertical polarization units.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and more particularly to a millimeter-wave dual-polarized ridge waveguide slot antenna. Background Technology

[0002] Waveguide slot antennas, as antennas for transmitting and receiving electromagnetic signals, are widely used in lightning and communication fields due to their advantages such as high bandwidth, structural stability, good scanning performance and ease of integration.

[0003] In phased array radar systems, it is necessary to ensure good radiated electrical performance, maintain good broadband characteristics, and good radiation pattern indicators while having limited range dimensions. However, under limited size, electromagnetic waves between waveguide slot antenna elements can interfere during electromagnetic wave radiation, affecting the radiation efficiency and reducing radiation pattern indicators. Summary of the Invention

[0004] To address the existing technical problems, this invention provides a millimeter-wave dual-polarized ridge waveguide slot antenna, which at least partially solves the above-mentioned technical problems. The first conjugate slot and the second conjugate slot respectively increase the spacing between adjacent horizontal polarization units and adjacent vertical polarization units, effectively reducing the mutual interference of electromagnetic waves radiated between horizontal polarization units and between vertical polarization units.

[0005] This invention provides a millimeter-wave dual-polarized ridge waveguide slot antenna, comprising:

[0006] Main body of the radar system;

[0007] Multiple horizontal polarization units are arranged sequentially at one end of the radar system body and are configured to radiate or receive horizontally polarized electromagnetic waves along a first direction. A first conjugate slot is provided between adjacent horizontal polarization units to reduce mutual interference during the radiation process of the horizontally polarized electromagnetic waves.

[0008] Multiple vertical polarization units are arranged sequentially at the other end of the radar system body and are configured to radiate or receive vertically polarized electromagnetic waves in a second direction perpendicular to the first direction. A second conjugate slot is provided between adjacent vertical polarization units to reduce mutual interference during the radiation process of the vertically polarized electromagnetic waves.

[0009] Multiple connectors, respectively mounted on multiple horizontal polarization units and multiple vertical polarization units, are configured to emit electromagnetic waves or receive electromagnetic waves from multiple horizontal polarization units and / or multiple vertical polarization units.

[0010] According to embodiments of this disclosure, each of the horizontal polarization units includes:

[0011] A first base is detachably mounted on the main body of the radar system, and a first ridge waveguide extending along the length direction is provided on the side of the first base away from the main body of the radar system.

[0012] A first cover plate is installed on the side of the first base where the first ridge waveguide is located. The interior of the first cover plate is a cavity to form a first waveguide groove. The first ridge waveguide is located at the central axis of the first waveguide groove extending in the length direction to guide the electromagnetic waves emitted by the connector to be transmitted along the first ridge waveguide and the first waveguide groove. The side of the first cover plate away from the first base is provided with a plurality of first gaps communicating with the first waveguide groove to form the horizontally polarized electromagnetic waves and radiate them outward.

[0013] According to embodiments of this disclosure, each of the vertical polarization units includes:

[0014] The second base is detachably mounted on the main body of the radar system;

[0015] The second cover plate is installed on the side of the second base away from the radar system body. The interior of the second cover plate is a cavity to form a second waveguide groove. The second cover plate is provided with a second ridge waveguide that protrudes downward and extends along the length direction. The second ridge waveguide is located at the central axis of the second waveguide groove in the length direction to guide the electromagnetic waves emitted by the connector to be transmitted along the second ridge waveguide and the second waveguide groove. The side of the second cover plate away from the second base is provided with a plurality of second gaps communicating with the second waveguide groove to form the vertically polarized electromagnetic waves and radiate them outward.

[0016] According to an embodiment of this disclosure, the width of the first cover plate is smaller than the width of the first base, so as to form the first conjugate groove between two adjacent first cover plates.

[0017] According to an embodiment of the present disclosure, the width of the second cover plate is less than the width of the second base in the second direction to form a second conjugate groove between two adjacent second cover plates.

[0018] According to an embodiment of this disclosure, the first gap is set to 2N, where N is an integer greater than 1.

[0019] The two first gaps located on both sides of the central axis in the width direction are located on the same side of the central axis in the length direction, and the first gaps on the same side of the central axis in the width direction are alternately distributed on both sides of the central axis extending in the length direction.

[0020] According to embodiments of this disclosure, the second gap is set to 2N, where N is an integer greater than 1.

[0021] The second slit is V-shaped, and the tips of the two second slits located on both sides of the central axis in the width direction are oriented in the same direction, and the concave or convex tips of any two adjacent second slits on the same side of the central axis in the width direction are oriented in opposite directions.

[0022] According to embodiments of this disclosure, both the first base and the second base are provided with mounting holes at both ends in the length direction. The mounting holes are suitable for mounting the first base and / or the second base to the radar system body in cooperation with bolts.

[0023] According to embodiments of this disclosure, the widths of the first cover plate and the second cover plate range from 5 to 8 mm.

[0024] According to embodiments of this disclosure, the wall thickness of the first cover plate and the second cover plate is 0.5-1 mm.

[0025] According to the millimeter-wave dual-polarized ridge waveguide slot antenna provided by the present invention, the connector emits electromagnetic waves, causing multiple horizontally polarized units or vertically polarized units to radiate horizontally polarized electromagnetic waves and vertically polarized electromagnetic waves outward, respectively. When multiple horizontally polarized units radiate horizontally polarized electromagnetic waves outward, the first conjugate slot increases the spacing between two adjacent horizontally polarized units, effectively reducing the mutual interference of radiated electromagnetic waves between horizontally polarized units; the second conjugate slot increases the spacing between two adjacent vertically polarized units, effectively reducing the mutual interference of radiated electromagnetic waves between vertically polarized units, improving the radiation efficiency of electromagnetic waves, and maintaining good broadband characteristics and radiation pattern indicators. Attached Figure Description

[0026] Figure 1 This is a partial schematic diagram of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention;

[0027] Figure 2 This is a front view of the horizontal polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention;

[0028] Figure 3 This is an array diagram of multiple horizontal polarization units of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention;

[0029] Figure 4 This is a cross-sectional view along the length of the horizontal polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0030] Figure 5 This is a first cross-sectional view in the width direction of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0031] Figure 6This is a second cross-sectional view in the width direction of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0032] Figure 7 This is a front view of the vertical polarization unit of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0033] Figure 8 This is an array diagram of multiple vertical polarization elements of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention; and

[0034] Figure 9 This is a cross-sectional view along the length of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0035] Figure 10 This is a first cross-sectional view in the width direction of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0036] Figure 11 This is a second cross-sectional view in the width direction of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0037] Figure 12 This is a third cross-sectional view along the width direction of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0038] Figure Labels

[0039] 1. Main body of the radar system;

[0040] 2. Horizontal polarization unit;

[0041] 21. First base;

[0042] 211. First mounting slot;

[0043] 22. First cover plate;

[0044] 221. First waveguide groove;

[0045] 222. First ridge waveguide;

[0046] 223. The first gap;

[0047] 23. First conjugate groove;

[0048] 3. Vertical polarization unit;

[0049] 31. Second base;

[0050] 311. Second mounting slot;

[0051] 32. Second cover plate;

[0052] 321. Second waveguide groove;

[0053] 322. Second ridge waveguide;

[0054] 323. The second gap;

[0055] 33. Second conjugate groove;

[0056] 4. Connectors;

[0057] 5. Mounting holes. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0059] The present invention is described herein with respect to structural embodiments and methods. It should be understood that this is not intended to limit the invention to the specific disclosed embodiments; the invention can be practiced using other features, elements, methods, and embodiments. Similar elements in different embodiments are typically designated with similar numbers.

[0060] Figure 1 This is a partial schematic diagram of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention; Figure 2 This is a front view of the horizontal polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention; Figure 3 This is an array diagram of multiple horizontal polarization units of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention; Figure 4 This is a cross-sectional view along the length of the horizontal polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0061] like Figure 1-4As shown, this embodiment of the invention provides a millimeter-wave dual-polarized ridge waveguide slot antenna, including a radar system body 1, multiple horizontal polarization units 2, multiple vertical polarization units 3, and multiple connectors 4. The multiple horizontal polarization units 2 are sequentially arranged and installed at one end of the radar system body 1, configured to radiate or receive horizontally polarized electromagnetic waves along a first direction. A first conjugate slot 23 is provided between adjacent horizontal polarization units 2 to reduce mutual interference during the horizontal polarization electromagnetic wave radiation process. The multiple vertical polarization units 3 are sequentially arranged and installed at the other end of the radar system body 1, configured to radiate or receive vertically polarized electromagnetic waves along a second direction perpendicular to the first direction. A second conjugate slot 33 is provided between adjacent vertical polarization units 3 to reduce mutual interference during the vertical polarization electromagnetic wave radiation process. The multiple connectors 4 are respectively installed on the multiple horizontal polarization units 2 and the multiple vertical polarization units 3, configured to emit electromagnetic waves or receive electromagnetic waves from the multiple horizontal polarization units 2 and / or the multiple vertical polarization units 3.

[0062] According to embodiments of this disclosure, connector 4 emits electromagnetic waves, causing multiple horizontally polarized units 2 or vertically polarized units 3 to radiate horizontally polarized electromagnetic waves and vertically polarized electromagnetic waves into the external free space, respectively. When multiple horizontally polarized units 2 radiate horizontally polarized electromagnetic waves, the first conjugate slot 23 is located between adjacent horizontally polarized units 2 and is shared, thereby increasing the spacing between two adjacent horizontally polarized units 2 and effectively reducing the mutual interference of electromagnetic waves radiated between horizontally polarized units 2. The second conjugate slot 33 increases the spacing between two adjacent vertically polarized units 3, effectively reducing the mutual interference of electromagnetic waves radiated between vertically polarized units 3 and improving the radiation efficiency of electromagnetic waves. Under limited size conditions, the millimeter-wave dual-polarized ridge waveguide slot antenna maintains good broadband characteristics and radiation pattern indicators.

[0063] In one exemplary embodiment, such as Figure 2 and Figure 3 As shown, each horizontal polarization unit 2 includes a first base 21 and a first cover plate 22.

[0064] The first base 21 is horizontally positioned, and mounting holes 5 are provided at both ends of the first base 21 along its length. The two mounting holes 5 penetrate the first base 21 along its thickness, facilitating the installation of the first base 21 onto the radar system body 1 in conjunction with bolts, thus simplifying assembly. Simultaneously, the mounting holes 5 reduce the weight of the horizontal polarization unit 2. A first ridge waveguide 222 extending along the length of the first base 21 is provided on the side of the first base 21 away from the radar system body 1. A mounting groove extending along the thickness of the first base 21 is provided in the middle of the first base 21.

[0065] Figure 5 This is a first cross-sectional view in the width direction of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention. Figure 6 This is a second cross-sectional view along the width direction of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0066] like Figure 4-6 As shown, a first cover plate 22 is installed on the side of the first base 21 where the first ridge waveguide 222 is provided. The interior of the first cover plate 22 is a cavity to form a first waveguide groove 221. The first ridge waveguide 222 is located at the central axis of the first waveguide groove 221 extending in the length direction. A connector 4 is installed in the mounting groove. The core of the connector 4 contacts the first cover plate 22, and the metal outer layer of the connector 4 contacts the first ridge waveguide 222 to guide the electromagnetic waves emitted by the connector 4 to transmit along the first ridge waveguide 222 and the first waveguide groove 221. The side of the first cover plate 22 away from the first base 21 is provided with a plurality of first gaps 223 communicating with the first waveguide groove 221 to form horizontally polarized electromagnetic waves and radiate outward.

[0067] According to the embodiments of this disclosure, the core and the outer metal layer of the connector 4 constitute an alternating electric field for electromagnetic wave transmission. The electromagnetic wave exists within the alternating electric field. When the core contacts the first cover plate 22 and the outer metal layer contacts the first ridge waveguide 222, an alternating electric field is also formed between the first cover plate 22 and the first ridge waveguide 222. The electromagnetic wave emitted by the connector 4 is transmitted to the alternating electric field between the first cover plate 22, the first ridge waveguide 222 and the first waveguide groove 221. Subsequently, the electromagnetic wave is transmitted along the first cover plate 22, the first ridge waveguide 222 and the first waveguide groove 221. The first ridge waveguide 222 guides the transmission of the electromagnetic wave, which can effectively reduce the size and weight of the horizontal ridge waveguide antenna body while satisfying good impedance bandwidth and radiation pattern characteristics.

[0068] In one exemplary embodiment, such as Figure 3 As shown, the width of the first cover plate 22 ranges from 5 to 8 mm, and the wall thickness of the first cover plate 22 is 0.5 to 1 mm. The width of the first cover plate 22 is smaller than the width of the first base 21, so as to form a first conjugate groove 23 between two adjacent first cover plates 22.

[0069] According to embodiments of this disclosure, the first conjugate slot 23 increases the spacing between adjacent horizontal polarization units 2, effectively reducing electromagnetic interference between horizontal polarization arrays. Under limited size conditions, the millimeter-wave dual-polarized ridge waveguide slot antenna maintains good electromagnetic radiation efficiency and radiation pattern performance.

[0070] In one exemplary embodiment, such as Figure 3 As shown, the number of first gaps 223 is set to 2N, where N is an integer greater than 1. For example, the number of first gaps 223 can be four, six, eight, ten, twelve, etc. In this embodiment, the number of first gaps 223 is set to four.

[0071] The first slit 223 extends along the length direction and is regularly arranged. The first slit 223 penetrates the top wall of the first cover plate 22 and communicates with the first waveguide groove 221. The two first slits 223 located on both sides of the central axis in the width direction are located on the same side of the central axis in the length direction, and the first slits 223 on the same side of the central axis in the width direction are alternately distributed on both sides of the central axis extending along the length direction.

[0072] According to embodiments of this disclosure, electromagnetic waves undergo periodic changes during transmission. The first gap 223 is located at a position where the rate of change of electromagnetic waves is large, enabling electromagnetic waves to effectively radiate into the external free space, forming horizontally polarized electromagnetic waves and improving the radiation efficiency of electromagnetic waves.

[0073] Figure 7 This is a front view of the vertical polarization unit of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention. Figure 8 This is an array diagram of multiple vertical polarization units of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention; Figure 9 This is a cross-sectional view along the length of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0074] In one exemplary embodiment, such as Figure 7 As shown, each vertical polarization unit 3 includes a second base 31 and a second cover plate 32.

[0075] like Figure 8 As shown, the second base 31 is horizontally positioned, and mounting holes 5 are provided at both ends of the second base 31 in the length direction. The two mounting holes 5 penetrate the second base 31 in the thickness direction, which are suitable for mounting the second base 31 to the radar system body 1 in cooperation with bolts, facilitating assembly. At the same time, the mounting holes 5 reduce the weight of the vertical polarization unit 3. A mounting groove extending in the thickness direction is provided in the middle of the second base 31.

[0076] Figure 10 This is a first cross-sectional view in the width direction of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention. Figure 11 This is a second cross-sectional view in the width direction of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention. Figure 12 This is a third cross-sectional view along the width direction of the vertical polarization element of a millimeter-wave dual-polarized ridge waveguide slot antenna according to an embodiment of the present invention.

[0077] like Figure 9-12As shown, the second cover plate 32 is installed on the side of the second base 31 away from the radar system body 1. The interior of the second cover plate 32 is a cavity to form a second waveguide groove 321. The second cover plate 32 is provided with a second ridge waveguide 322 that protrudes downward and extends along the length direction. The second ridge waveguide 322 is located at the central axis of the second waveguide groove 321 extending along the length direction. The connector 4 is installed in the mounting groove. The core of the connector 4 contacts the second cover plate 32, and the metal outer layer of the connector 4 contacts the second ridge waveguide 322 to guide the electromagnetic waves emitted by the connector 4 to be transmitted along the second ridge waveguide 322 and the second waveguide groove 321. The side of the second cover plate 32 away from the second base 31 is provided with a plurality of second gaps 323 that communicate with the second waveguide groove 321 to form vertically polarized electromagnetic waves and radiate outward.

[0078] According to the embodiments of this disclosure, the core and the outer metal layer of connector 4 constitute an alternating electric field for electromagnetic wave transmission. The electromagnetic wave exists within the alternating electric field. When the core contacts the second cover plate 32 and the outer metal layer contacts the second ridge waveguide 322, an alternating electric field is also formed between the second cover plate 32 and the second ridge waveguide 322. The electromagnetic wave emitted by connector 4 is transmitted to the alternating electric field between the second cover plate 32, the second ridge waveguide 322 and the second waveguide groove 321. Subsequently, the electromagnetic wave is transmitted along the second cover plate 32, the second ridge waveguide 322 and the second waveguide groove 321. The second ridge waveguide 322 guides the transmission of the electromagnetic wave, which can effectively reduce the size and weight of the horizontal ridge waveguide antenna body while satisfying good impedance bandwidth and radiation pattern characteristics.

[0079] In one exemplary embodiment, such as Figure 8 As shown, the width of the second cover plate 32 ranges from 5 to 8 mm, and the wall thickness of the second cover plate 32 is 0.5 to 1 mm. The width of the second cover plate 32 is less than the width of the second base 31 in the second direction, so as to form a second conjugate groove 33 between two adjacent second cover plates 32.

[0080] According to embodiments of this disclosure, the second conjugate slot 33 increases the spacing between adjacent vertical polarization units 3, effectively reducing electromagnetic interference between vertical polarization arrays. Under limited size conditions, the millimeter-wave dual-polarized ridge waveguide slot antenna maintains good electromagnetic radiation efficiency and radiation pattern performance.

[0081] In one exemplary embodiment, such as Figure 8 As shown, the second gap 323 is set to 2N, where N is an integer greater than 1. For example, the second gap 323 can be set to four, six, eight, ten, twelve, etc. In this embodiment, the first gap 223 is set to four.

[0082] The second slit 323 is V-shaped and extends along the thickness direction. The second slit 323 penetrates the top wall of the second cover plate 32 and communicates with the second waveguide groove 321. The second slit 323 partially passes through the top of the second ridge waveguide 322. The tips of the two second slits 323 on both sides of the central axis in the width direction face the same direction. The concave or convex directions of the tips of any two adjacent second slits 323 on the same side of the central axis in the width direction are opposite.

[0083] According to embodiments of this disclosure, electromagnetic waves undergo periodic changes during transmission. The second gap 323 is located at a position where the rate of change of electromagnetic waves is large, enabling electromagnetic waves to effectively radiate into the external free space to form vertically polarized electromagnetic waves and improve the radiation efficiency of electromagnetic waves.

[0084] According to the millimeter-wave dual-polarized ridge waveguide slot antenna provided by the present invention, the connector 4 emits electromagnetic waves, causing multiple horizontally polarized units 2 or vertically polarized units 3 to radiate horizontally polarized electromagnetic waves and vertically polarized electromagnetic waves outward, respectively. When multiple horizontally polarized units 2 radiate horizontally polarized electromagnetic waves outward, the first conjugate slot 23 increases the spacing between two adjacent horizontally polarized units 2, effectively reducing the mutual interference of electromagnetic waves radiated between horizontally polarized units 2; the second conjugate slot 33 increases the spacing between two adjacent vertically polarized units 3, effectively reducing the mutual interference of electromagnetic waves radiated between vertically polarized units 3, improving the radiation efficiency of electromagnetic waves, and maintaining good broadband characteristics and radiation pattern indicators.

[0085] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A millimeter-wave dual-polarized ridge waveguide slot antenna, characterized in that, include: Radar system main body (1); Multiple horizontal polarization units (2) are sequentially arranged and installed at one end of the radar system body (1), and are configured to radiate or receive horizontally polarized electromagnetic waves along a first direction. A first conjugate slot (23) is provided between adjacent horizontal polarization units (2) to reduce mutual interference during the radiation process of the horizontally polarized electromagnetic waves. Each horizontal polarization unit (2) includes: A first base (21) is detachably mounted on the radar system body (1), and a first ridge waveguide (222) extending along the length direction is provided on the side of the first base (21) away from the radar system body (1). A first cover plate (22) is installed on the side of the first base (21) where the first ridge waveguide (222) is located. The width of the first cover plate (22) is smaller than the width of the first base (21) so as to form the first conjugate groove (23) between two adjacent first cover plates (22). Multiple vertical polarization units (3) are sequentially arranged and installed at the other end of the radar system body (1), and are configured to radiate or receive vertically polarized electromagnetic waves in a second direction perpendicular to the first direction. A second conjugate slot (33) is provided between adjacent vertical polarization units (3) to reduce mutual interference during the radiation process of the vertically polarized electromagnetic waves. Each vertical polarization unit (3) includes: The second base (31) is detachably mounted on the main body (1) of the radar system; A second cover plate (32) is installed on the side of the second base (31) away from the radar system body (1). The width of the second cover plate (32) is smaller than the width of the second base (31) in the second direction to form a second conjugate groove (33) between two adjacent second cover plates (32). Multiple connectors (4), respectively mounted on multiple horizontal polarization units (2) and multiple vertical polarization units (3), are configured to emit electromagnetic waves or receive electromagnetic waves from multiple horizontal polarization units (2) and / or multiple vertical polarization units (3).

2. The millimeter-wave dual-polarized ridge waveguide slot antenna according to claim 1, characterized in that, The interior of the first cover plate (22) is a cavity to form a first waveguide groove (221). The first ridge waveguide (222) is located at the central axis of the first waveguide groove (221) extending in the length direction to guide the electromagnetic waves emitted by the connector (4) to be transmitted along the first ridge waveguide (222) and the first waveguide groove (221). The side of the first cover plate (22) away from the first base (21) is provided with a plurality of first gaps (223) communicating with the first waveguide groove (221) to form the horizontally polarized electromagnetic waves and radiate them outward.

3. The millimeter-wave dual-polarized ridge waveguide slot antenna according to claim 1, characterized in that, The interior of the second cover plate (32) is a cavity to form a second waveguide groove (321). The second cover plate (32) is provided with a second ridge waveguide (322) that protrudes downward and extends along the length direction. The second ridge waveguide (322) is located at the central axis of the second waveguide groove (321) extending along the length direction to guide the electromagnetic waves emitted by the connector (4) to be transmitted along the second ridge waveguide (322) and the second waveguide groove (321). On the side of the second cover plate (32) away from the second base (31), a plurality of second slits (323) communicating with the second waveguide groove (321) are provided to form the vertically polarized electromagnetic waves and radiate outward.

4. The millimeter-wave dual-polarized ridge waveguide slot antenna according to claim 2, characterized in that, The first gap (223) is set to 2N, where N is an integer greater than 1. The first gap (223) extends along the length direction. The two first gaps (223) located on both sides of the central axis in the width direction are located on the same side of the central axis in the length direction, and the first gaps (223) on the same side of the central axis in the width direction are alternately distributed on both sides of the central axis extending along the length direction.

5. The millimeter-wave dual-polarized ridge waveguide slot antenna according to claim 3, characterized in that, The second gap (323) is set to 2N, where N is an integer greater than 1. The second slit (323) is V-shaped, and the tips of the two second slits (323) on both sides of the central axis in the width direction are oriented in the same direction. The concave or convex tips of any two adjacent second slits (323) on the same side of the central axis in the width direction are oriented in opposite directions.

6. The millimeter-wave dual-polarized ridge waveguide slot antenna according to claim 1, characterized in that, The first base (21) and the second base (31) are provided with mounting holes (5) at both ends in the length direction. The mounting holes (5) are suitable for mounting the first base (21) and / or the second base (31) to the radar system body (1) in cooperation with bolts.

7. The millimeter-wave dual-polarized ridge waveguide slot antenna according to claim 1, characterized in that, The width of the first cover plate (22) and the second cover plate (32) ranges from 5 to 8 mm.

8. The millimeter-wave dual-polarized ridge waveguide slot antenna according to claim 1, characterized in that, The wall thickness of the first cover plate (22) and the second cover plate (32) is 0.5-1mm.

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