Non-periodic-arranged flat slot radiation array face

A non-periodic, frontal technology, applied in the field of radiation fronts, can solve the problems of radar not working properly, antenna gain drop, etc., to achieve the effect of large gain and small side lobe level

Inactive Publication Date: 2006-10-25
南京璇星科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there are many periodic parasitic sidelobes in the measured far area lobe, which greatly reduces the ante

Method used

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  • Non-periodic-arranged flat slot radiation array face
  • Non-periodic-arranged flat slot radiation array face
  • Non-periodic-arranged flat slot radiation array face

Examples

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Effect test

Embodiment 1

[0015] A non-periodically arranged flat plate slit radiation front, including the first quadrant front, the second quadrant front, the third quadrant front and the fourth quadrant front, the first quadrant front and the third quadrant front The center is symmetrical, and the second quadrant and the fourth quadrant are symmetrical with the center of the front as the symmetrical point; the first quadrant, the second quadrant, the third quadrant and the fourth quadrant are all Including at least 2 sub-arrays, each sub-array is composed of array elements, and there is one radiation slot on each array element, the arrangement of the sub-arrays is non-periodic arrangement, the number of array elements is randomly distributed, and the phase center of each sub-array is at The projection spacing on the azimuth and elevation planes of the front is greater than half a wavelength and less than 1.5 times the wavelength; the phases of all radiation slots are distributed in the same phase, an...

Embodiment 2

[0017] A non-periodically arranged flat plate slit radiation front, including the first quadrant front, the second quadrant front, the third quadrant front and the fourth quadrant front, the first quadrant front and the third quadrant front The center is symmetrical, and the second quadrant and the fourth quadrant are symmetrical with the center of the front as the symmetrical point; the first quadrant, the second quadrant, the third quadrant and the fourth quadrant are all Including at least 2 sub-arrays, each sub-array is composed of array elements, and there is one radiation slot on each array element, the arrangement of the sub-arrays is non-periodic arrangement, the number of array elements is randomly distributed, and the phase center of each sub-array is at The projection spacing on the azimuth and elevation planes of the front is greater than half a wavelength and less than 1.5 times the wavelength; the phases of all radiation slots are distributed in the same phase, an...

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Abstract

This invention discloses a non-periodic arrayed flat rift radiation arrayed face including a first, a second, a third and a fourth quadrant arrayed faces, in which, the first and the third are symmetrical with the arrayed face center as the symmetric point, the second and the fourth quadrant arrayed faces are symmetric with the center as the symmetric point, each of the four quadrants includes at least two sub-arrays, each is composed of array cells, one radiation slot is set on each cell, the sub-array is arranged un-periodically and the cells are distributed randomly, the phase center of each sub-array projects on the orientation face and the overhead-bow face in the distance larger than half-wave length and smaller than 1.5 times wave length, phases of all radiation slots are distributed in-phase.

Description

technical field [0001] The invention relates to a radiation front of a waveguide plate longitudinal slot array antenna, in particular to a non-periodically arranged flat plate slot radiation front for airborne, missile-borne and space-borne antennas. Background technique [0002] Waveguide plate longitudinal slot array antennas are widely used in airborne, missile-borne and space-borne antennas. When the working frequency band is 5%, and the required bandwidth V.S.W.R≤2, the array is often divided into several sub-arrays to meet the requirements of the in-band impedance bandwidth . When the antenna gain is greater than 38dB, the number of array elements is greater than 3000, and the array is divided into more sub-arrays. So how are the subarrays arranged? Usually people are arranged according to the normal two-dimensional equidistant and equivariant rules. As a result, many periodic parasitic sidelobes appeared in the measured far-field lobes, which greatly reduced the an...

Claims

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Application Information

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IPC IPC(8): H01Q21/00H01Q13/00
Inventor 邱家恒张锡林李俊沛
Owner 南京璇星科技发展有限公司
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