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L-shaped antenna and its array based on improved "h"-shaped waveguide slot

A technology of waveguide slots and slots, which is applied in the field of large-scale active phased array radars, can solve problems such as height differences, and achieve the effects of low processing difficulty, compact structure, and enhanced array randomness

Active Publication Date: 2021-10-29
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and propose an improved "H" shaped waveguide slot structure, which is used to solve the problem of horizontal polarization by opening a slot on the wide side of the waveguide, and solves the problem of horizontal polarization gaps. There is a problem of height difference between the waveguide and the vertically polarized slot waveguide, which realizes the L-shaped antenna and its array application

Method used

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  • L-shaped antenna and its array based on improved "h"-shaped waveguide slot
  • L-shaped antenna and its array based on improved "h"-shaped waveguide slot
  • L-shaped antenna and its array based on improved "h"-shaped waveguide slot

Examples

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Embodiment 1

[0039] see figure 1 , figure 2 , image 3 ,and Figure 4

[0040] Based on the improved "H" waveguide slot L-shaped antenna works in the Ku band, the working center frequency free space wavelength λ0 is 18.75mm, and the working center frequency waveguide wavelength λg0 is 19.2mm.

[0041] An L-shaped antenna based on an improved "H" waveguide slot, including a pair of "butterfly" waveguide slots 1, a pair of longitudinal waveguide slots 2, a "butterfly" slot feeding waveguide 3, and a longitudinal slot feeding waveguide 4 , "L" shaped waveguide power splitter 5, connector jack 6, top plate 7, middle shell 8 and bottom shell 9, the "butterfly" shaped waveguide slot 1 includes a pair of identical "H" shaped slots 1.1 ;

[0042] It is characterized in that the pair of "butterfly" waveguide slots 1 are located at one end of the long arm of the "L" antenna, and are mirror-symmetrical about the XOZ plane;

[0043] The pair of longitudinal waveguide slits 2 are located at the ...

Embodiment 2

[0065] Referring to Example 1, the "H"-shaped gap 1.1 is provided with a bending angle α, α is expressed as 30 to 50 degrees, and the angle α of the bending arm of the "H"-shaped gap is taken as 30 degrees, and other parameters remain unchanged. Meet the use requirements of the antenna.

Embodiment 3

[0067] Referring to Example 1, the "H"-shaped gap 1.1 is provided with a bending angle α, α is expressed as 30 to 50 degrees, and the angle α of the bending arm of the "H"-shaped gap is taken as 50 degrees, and other parameters remain unchanged. Meet the use requirements of the antenna.

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Abstract

The invention relates to an L-shaped antenna based on an improved "H" waveguide slot, including a pair of "butterfly" waveguide slots, a pair of longitudinal waveguide slits, a "butterfly" slot feeding waveguide, a longitudinal slot feeding waveguide, "L" shaped waveguide power divider, connector jack, top plate, middle shell and bottom shell, the "butterfly" shaped waveguide slots include a pair of identical "H" shaped slots. A pair of "butterfly" waveguide slots are located at one end of the long arm of the "L"-shaped antenna, and a pair of longitudinal waveguide slits are located at one end of the short arm of the "L"-shaped antenna. A pair of longitudinal waveguide slot antennas is based on the improved "H" waveguide slot structure to achieve horizontal polarization on the broadside of the waveguide, and then combined with the longitudinal slot waveguide to realize a single-polarized L-shaped antenna. The L-shaped antenna of the present invention can be combined into an irregular planar array antenna, and the L-shaped antenna used has 8 types in total, each of which has different performance, which enhances the randomness of the array and can effectively suppress the scanning grating lobes of the array.

Description

technical field [0001] The invention belongs to the technical field of array antennas, and in particular relates to an improved "H"-shaped waveguide slot L-shaped antenna and an array thereof in irregular array technology, which can be applied to large-scale active phased array radars. Background technique [0002] Irregular array technology is a solution to the sparse channel of a large active phased array radar. Commonly used channel thinning methods include: limited field of view scanning, sparse array, sub-array level feed, irregular sub-array, etc. The limited field of view scanning method reduces the number of active channels by increasing the spacing between antenna units, but sacrifices the scanning capability of the antenna array, and has a narrow application range; the sparse array reduces the number of active channels by sparsening the antenna units in a certain proportion, which can Effectively suppress the scanning grating lobes, but the design is difficult, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q13/10H01Q1/36H01Q1/50H01Q21/29
CPCH01Q1/36H01Q1/50H01Q13/10H01Q21/293
Inventor 孙立春杨兴菊袁伟明纠博刘宏伟
Owner XIDIAN UNIV