Dual-polarization broadband ridge waveguide slot antenna

Abstract

The present disclosure provides a dual-polarization broadband ridge waveguide slot antenna, comprising: a plurality of horizontal polarization units and a plurality of vertical polarization units, the horizontal polarization units and the vertical polarization units are arranged in an interlaced manner to form an antenna radiation array; a connector is arranged at the bottom of each horizontal polarization unit and each vertical polarization unit; wherein the horizontal polarization unit and the vertical polarization unit both comprise a ridge waveguide and a power divider; the power divider is arranged in the hollow inner space of the ridge waveguide, connected to the top of the ridge waveguide, and connected to the connector, for feeding power to the ridge waveguide; the top of the ridge waveguide of the horizontal polarization unit longitudinally opens a plurality of linear slots along the extension direction of the ridge waveguide; the top of the ridge waveguide of the vertical polarization unit opens a plurality of figure-eight slots in the extension direction of the ridge waveguide. The dual-polarization broadband ridge waveguide slot antenna can achieve a small size while having good impedance matching in a broadband range, and ensures good directional pattern characteristics.

Description

Technical Field

[0001] The present disclosure relates to the technical field of radar antennas, and in particular to a dual-polarization broadband ridge waveguide slot antenna. Background Art

[0002] In order to meet the requirements of phased array radar systems for radiation electrical performance and distance to small size, it is necessary to design broadband, good pattern quality and miniaturized antenna radiating units. Among the existing antenna forms, waveguide antennas have become a commonly used antenna form due to their high bandwidth, stable structure, excellent scanning performance and easy integration.

[0003] In order to optimize the performance of waveguide slot antennas, there have been many related studies to reduce the distance dimension while ensuring good matching characteristics and radiation patterns of the antenna. The existing methods generally adopt the method of adding ridges in the waveguide to change the transmission mode of electromagnetic waves in the waveguide, thereby achieving lower frequency electromagnetic excitation and propagation in a narrower dimension. In view of the current demand for small size, broadband characteristics and good radiation pattern indicators of radar antennas, it is necessary to design horizontal and vertical polarized ridge waveguide slot antennas and matching integrated ridge waveguide one-to-two power dividers. Summary of the invention

[0004] In view of the above problems, the present invention provides a dual-polarization broadband ridge waveguide slot antenna to solve the problem of maintaining broadband characteristics and good radiation pattern indicators while reducing the size of the antenna.

[0005] One aspect of the present disclosure provides a dual-polarization broadband ridge waveguide slot antenna, comprising: a plurality of horizontal polarization units and a plurality of vertical polarization units, wherein the horizontal polarization units and the vertical polarization units are arranged in an alternating manner to form an antenna radiation array; a connector is disposed at the bottom of each of the horizontal polarization units and each of the vertical polarization units; wherein the horizontal polarization unit and the vertical polarization unit both comprise a ridge waveguide and a power divider; the power divider is disposed in the hollow internal space of the ridge waveguide, connected to the top of the ridge waveguide, and connected to the connector for feeding power to the ridge waveguide; a plurality of linear slots are longitudinally provided at the top of the ridge waveguide of the horizontal polarization unit along the extension direction of the ridge waveguide; a plurality of figure-eight slots are longitudinally provided at the top of the ridge waveguide of the vertical polarization unit in the extension direction of the ridge waveguide.

[0006] Optionally, the ridge inside the power divider is a stepped structure, and the thickness, height and shape of each step are not completely the same.

[0007] Optionally, the wall thickness of the ridge waveguide of the horizontal polarization unit and the vertical polarization unit is 0.5-1 mm.

[0008] Optionally, the width of the horizontal polarization unit is 7-10 mm.

[0009] Optionally, the width of the vertical polarization unit is 4-6 mm.

[0010] Optionally, a width of an adjacent group of the horizontal polarization units and the vertical polarization units is less than 11-16 mm.

[0011] Optionally, each of the horizontal polarization units includes 4-12 of the linear slots, and each of the vertical polarization units includes 4-12 of the figure eight slots.

[0012] Optionally, the frequency band range of the dual-polarization broadband ridge waveguide slot antenna is 14-20 GHz.

[0013] Optionally, the antenna radiation array is grounded through a metal casing.

[0014] Optionally, connectors at the bottom of each of the horizontal polarization units and each of the vertical polarization units are located on the same plane.

[0015] At least one of the above technical solutions adopted in the embodiments of the present disclosure can achieve the following beneficial effects:

[0016] The present invention provides a small-sized dual-polarization broadband ridge waveguide slot antenna, comprising a plurality of horizontal polarization units and a plurality of vertical polarization units, wherein the horizontal polarization units and the vertical polarization units are arranged in an alternating manner to form an antenna radiation array, and a power divider is arranged in the ridge waveguide of the horizontal polarization unit and the vertical polarization unit to realize the excitation of the integrated ridge waveguide power divider, thereby realizing the distance miniaturization of the antenna while ensuring the good quality of the directional pattern within a wide frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] For a more complete understanding of the present disclosure and its advantages, reference will now be made to the following description taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1 The schematic diagram of the array of the dual-polarization broadband ridge waveguide slot antenna provided by the embodiment of the present disclosure is schematically shown;

[0019] Figure 2A A schematic diagram of the front and side views of a horizontally polarized radiation unit provided by an embodiment of the present disclosure is schematically shown;

[0020] Figure 2B A schematic diagram of a power divider and a connector in a horizontally polarized radiation unit provided by an embodiment of the present disclosure is schematically shown;

[0021] Figure 3A A schematic diagram of the front and side views of a vertically polarized radiation unit provided by an embodiment of the present disclosure is schematically shown;

[0022] Figure 3BA schematic diagram of a power divider and a connector in a vertically polarized radiation unit provided by an embodiment of the present disclosure is schematically shown;

[0023] Figure 4 A schematic diagram of a group of horizontally polarized radiation units and vertically polarized radiation units provided by an embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0024] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0025] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0026] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0027] Some block diagrams and / or flow charts are shown in the accompanying drawings. It should be understood that some blocks or combinations thereof in the block diagrams and / or flow charts may be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that these instructions, when executed by the processor, may create a device for implementing the functions / operations described in these block diagrams and / or flow charts.

[0028] Therefore, the technology of the present disclosure can be implemented in the form of hardware and / or software (including firmware, microcode, etc.). In addition, the technology of the present disclosure can take the form of a computer program product on a computer-readable medium storing instructions, which can be used by an instruction execution system or in combination with an instruction execution system. In the context of the present disclosure, a computer-readable medium can be any medium that can contain, store, transmit, propagate, or transmit instructions. For example, a computer-readable medium can include, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, device, or propagation medium. Specific examples of computer-readable media include: magnetic storage devices, such as magnetic tapes or hard disks (HDDs); optical storage devices, such as compact disks (CD-ROMs); memories, such as random access memories (RAMs) or flash memory; and / or wired / wireless communication links.

[0029] Figure 1 The schematic diagram of the array of the dual-polarization broadband ridge waveguide slot antenna provided by the embodiment of the present disclosure is schematically shown.

[0030] like Figure 1 As shown, an embodiment of the present disclosure provides a dual-polarization broadband ridge waveguide slot antenna, comprising: a plurality of horizontal polarization units and a plurality of vertical polarization units, the horizontal polarization units and the vertical polarization units are arranged in an alternating manner to form an antenna radiation array. The horizontal polarization unit and the vertical polarization unit both include a ridge waveguide and a power divider; the power divider is disposed in the hollow internal space of the ridge waveguide, connected to the top of the ridge waveguide, and connected to a connector for feeding power to the ridge waveguide. Each horizontal polarization unit and each vertical polarization unit includes a connector, which is disposed at the bottom of the horizontal polarization unit and the vertical polarization unit.

[0031] The antenna uses a ridge waveguide slot antenna excited by an integrated ridge waveguide power divider with two polarization modes. The staggered arrangement realizes dual polarization of the array, and achieves miniaturization of the antenna distance while ensuring good quality of the radiation pattern within a wide bandwidth.

[0032] In this embodiment, the antenna radiation array is in contact with the ground through the grounding post, which provides a stable impedance zero point for the entire radiation array.

[0033] Figure 2A A schematic diagram of the front and side views of a horizontally polarized radiation unit provided by an embodiment of the present disclosure is schematically shown.

[0034] like Figure 2A As shown, the horizontal polarization unit is realized by longitudinal slits in the ridge waveguide. Specifically, a plurality of linear slits are longitudinally opened at the top of the ridge waveguide of the horizontal polarization unit along the extension direction of the ridge waveguide, and every three slits are staggered at the center line of the ridge waveguide. The width of the horizontal polarization unit is 7-10mm.

[0035] Figure 3AA schematic diagram of the front and side views of a vertically polarized radiation unit provided by an embodiment of the present disclosure is schematically shown.

[0036] like Figure 3A As shown, the vertical polarization unit is implemented by ridge waveguide slits. Specifically, a plurality of slits are opened in the extension direction of the ridge waveguide at the top of the vertical polarization unit, wherein the opening directions of the slits are alternately opposite. The width of the vertical polarization unit is 4-6mm.

[0037] like Figure 2B , 3B As shown, the horizontal polarization unit and the vertical polarization unit both use ridge waveguide power dividers (the parts marked by the boxes in the main bodies of the horizontal polarization unit and the vertical polarization unit) for excitation and feeding. The ridge inside the power divider is a step-type structure, and the thickness, height and shape of each step of the ridge waveguide are designed to be different, which can optimize the impedance matching. In addition, the power divider is set in the ridge waveguide, and the ridge waveguide and the power divider have overlapping and shared parts, thereby reducing space and size, while reducing unnecessary losses.

[0038] In this embodiment, the connector (the portion indicated by the box below the main body of the horizontal polarization unit and the vertical polarization unit) is arranged in the middle position of the bottom of the horizontal polarization unit and the vertical polarization unit. Since the size of the smallest connector on the market still exceeds the width of the vertical polarization unit in this embodiment, the horizontal polarization units and the vertical polarization units are staggered to avoid interference between the connectors. In order to facilitate the installation of the antenna, the connectors at the bottom of each horizontal polarization unit and each vertical polarization unit are located on the same plane. Since the thickness of each horizontal polarization unit and each vertical polarization unit may be different, the distance between the power divider and the top of the ridge waveguide can be adjusted accordingly so that the connector connected to the power divider is adjusted to the same plane.

[0039] In this embodiment, each horizontal polarization unit includes 4-12 straight slots, and each vertical polarization unit includes 4-12 figure-eight slots, which can meet the antenna azimuth dimension requirements and the 14-20 GHz operating bandwidth requirements.

[0040] In this embodiment, in order to achieve maximum compression in distance dimension, the wall thickness of the ridge waveguide of all components is only 0.5-1 mm.

[0041] Figure 4 A schematic diagram of a group of horizontally polarized radiation units and vertically polarized radiation units provided by an embodiment of the present disclosure is schematically shown.

[0042] like Figure 4 As shown, the horizontal polarization units and the vertical polarization units are arranged alternately to avoid interference between the connectors. In this embodiment, the width of a group of horizontal polarization units and vertical polarization units is less than 11-16 mm.

[0043] The embodiment of the present disclosure provides a dual-polarization broadband ridge waveguide slot antenna, which can achieve a small size while having good impedance matching in a broadband range and ensuring good directional pattern characteristics. The method uses the antenna radiating array to be grounded through a metal shell, providing a stable impedance zero point for the entire radiating array, while using a differential feeding method to excite a high-symmetry radiating unit, and using a sleeve slot excitation method to ensure the antenna bandwidth. The antenna method provides a good impedance bandwidth, polarization isolation, and unit isolation of the radiating unit. The final processing of actual data shows that the use of this antenna can ensure that the antenna has good directional pattern polarization isolation in both transmitting and receiving conditions.

[0044] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways, even if such combinations and / or combinations are not explicitly described in the present disclosure. In particular, the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways without departing from the spirit and teachings of the present disclosure. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0045] Although the present disclosure has been shown and described with reference to specific exemplary embodiments of the present disclosure, it should be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-mentioned embodiments, but should be determined not only by the appended claims, but also by the equivalents of the appended claims.

Claims

1. A dual-polarization broadband ridge waveguide slot antenna, characterized in that: include: A plurality of horizontal polarization units and a plurality of vertical polarization units, wherein the horizontal polarization units and the vertical polarization units are arranged alternately to form an antenna radiation array; A connector, disposed at the bottom of each of the horizontal polarization units and each of the vertical polarization units; Wherein, the horizontal polarization unit and the vertical polarization unit both include a ridge waveguide and a power divider; the power divider is arranged in the hollow internal space of the ridge waveguide, connected to the top of the ridge waveguide, and connected to the connector, and is used to feed power to the ridge waveguide; the ridge waveguide inside the power divider is a stepped structure, and the thickness, height and shape of each step are not completely the same; A plurality of linear slots are longitudinally provided at the top of the ridge waveguide of the horizontal polarization unit along the extension direction of the ridge waveguide; each of the horizontal polarization units includes 4 to 12 linear slots, and each of the vertical polarization units includes 4 to 12 figure eight slots; A plurality of figure eight slits are provided on the top of the ridge waveguide of the vertical polarization unit along the extension direction of the ridge waveguide; The frequency band range of the dual-polarization broadband ridge waveguide slot antenna is 14-20 GHz.

2. The dual-polarization broadband ridge waveguide slot antenna according to claim 1, characterized in that: The wall thickness of the ridge waveguide of the horizontal polarization unit and the vertical polarization unit is 0.5-1 mm.

3. The dual-polarization broadband ridge waveguide slot antenna according to claim 1, characterized in that: The width of the horizontal polarization unit is 7-10 mm.

4. The dual-polarization broadband ridge waveguide slot antenna according to claim 1, characterized in that: The width of the vertical polarization unit is 4-6 mm.

5. The dual-polarization broadband ridge waveguide slot antenna according to claim 1, characterized in that: The width of an adjacent group of the horizontal polarization units and the vertical polarization units is less than 11-16 mm.

6. The dual-polarization broadband ridge waveguide slot antenna according to claim 1, characterized in that: The antenna radiation array is grounded through a metal casing.

7. The dual-polarization broadband ridge waveguide slot antenna according to claim 1, characterized in that: The connectors at the bottom of each of the horizontal polarization units and each of the vertical polarization units are located on the same plane.

Images