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Frequency selective surface in combined guidance system of active and passive radar

A technology of frequency selective surface and composite guidance, which is applied in the direction of waveguide devices, radiation unit covers, electrical components, etc., can solve the problems of narrow working bandwidth of passive radar, inability to apply composite guidance system, and narrow dual bandpass interval of active and passive radar , to achieve the effect of improving survivability and penetration ability

Active Publication Date: 2014-09-24
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems that the passive radar working bandwidth of the hybrid FSS is narrow, the active-passive radar double-bandpass interval is narrow, and the composite guidance system cannot be applied in the prior art, and a kind of active-passive radar composite guidance system is provided. frequency selective surface

Method used

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  • Frequency selective surface in combined guidance system of active and passive radar
  • Frequency selective surface in combined guidance system of active and passive radar
  • Frequency selective surface in combined guidance system of active and passive radar

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Embodiment 1

[0025] First, it is assumed that in the active-passive composite guidance system, the passive radar operating band ranges from 2GHz to 4GHz, and the active radar operating band operates from 20GHz to 22GHz.

[0026] According to the working band requirements of active and passive radars, the designed frequency selective surface includes multiple cross-shaped patch units arranged periodically and multiple electronically controlled lumped elements 2 arranged periodically. Any two adjacent cross-shaped patches The closest end of the unit is connected by an electronically controlled lumped element 2, and each cross-shaped patch unit is provided with a cross-shaped opening, and the cross-shaped opening and the cross-shaped patch unit have the same center point and center line ;Such as image 3 As shown, the line width W of the cross-shaped patch unit out =1mm, the line width W of the cross-shaped opening in =0.6mm, the period T of the cross-shaped patch unit=7mm, and the length S...

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Abstract

The invention discloses a frequency selective surface in a combined guidance system of an active / passive radar, and belongs to the technical field of frequency selective surfaces. The frequency selective surface solves the technical problems in the prior art that a mixed-type FSS passive radar is small in working bandwidth, the active / passive radar is narrow in dual-band pass interval, and the radars cannot be used for the combined guidance system. The frequency selective surface provided by the invention comprises a plurality of metal paster units and a plurality of electric-control lumped elements, wherein the plurality of metal paster units are arranged periodically, any two adjacent metal paster units are connected through one electric-control lumped element, and the interior of each metal paster unit is provided with an opening. When the electric-control lumped elements are connected, the frequency selective surface has the high-pass filtering characteristic, can achieve the switching function of the passive radar which works at wide frequency band. When the electric-control lumped elements are disconnected, the frequency selective surface has the characteristic of wide-interval double-band pass. The frequency selective surface can be used for the cloaking of an antenna of an active / passive combined guidance weapon, and improves the viability and capacity of defense penetration of the active / passive combined guidance weapon.

Description

technical field [0001] The invention relates to a frequency selective surface in an active-passive radar composite guidance system, belonging to the technical field of frequency selective surfaces. Background technique [0002] The active-passive radar composite guidance system makes full use of the characteristics of active radar guidance with high precision and can work all-weather or quasi-all-weather, and the advantages of passive radar with long detection distance, concealment, and strong anti-interference ability. Radar detection, active radar detection in the near area, so that missiles and other aircraft have the advantages of long-distance, high-precision guidance and anti-jamming. According to the above-mentioned active and passive radar guidance principle, the metal surface antenna and high-frequency components inside the composite guidance hood will form a cavity effect, which contributes more than 50% to the radar cross section (RCS) directly in front of the air...

Claims

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Application Information

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IPC IPC(8): H01P1/20H01Q1/42
Inventor 徐念喜高劲松
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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