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Method for improving movement of Salisbury screen and UHF radar spectrum

A technology of screen and frequency modulation, which is applied in the field of improving Salisbury screen and UHF radar spectrum shifting, and can solve the problems that are not suitable for incoming wave signals with large bandwidth

Inactive Publication Date: 2018-01-19
CHONGQING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

The Salisbury screen either has only one layer of frequency selective surface structure, or its operating frequency is related to the distance between the free space impedance layer and the back plate (good conductor), which is not suitable for incoming wave signals with large bandwidth and multiple directions

Method used

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  • Method for improving movement of Salisbury screen and UHF radar spectrum
  • Method for improving movement of Salisbury screen and UHF radar spectrum
  • Method for improving movement of Salisbury screen and UHF radar spectrum

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Embodiment Construction

[0043] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, and Not all examples.

[0044] A UHF radar spectrum shifting method based on the improved Salisbury screen proposed by the invention, such as figure 1 shown, including:

[0045] According to the characteristics of the Salisbury screen, calculate the reflection coefficient expressions of TE wave and TM wave;

[0046] Solve the inductance value that makes the reflection coefficient of TM wave approach zero;

[0047] In order to apply the wave to a large bandwidth and reduce the reflection coefficient, a negative inductive reactance layer is added to the resistive layer of the Salisbury screen, and the inductance value i...

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Abstract

The present invention relates to the field of radar stealth systems, and in particular to a method for improving the movement of a Salisbury screen and a UHF radar spectrum. The method comprises: designing a novel Salisbury screen based on the time-controlled reflection surface to obtain a reflection coefficient expression of TE waves and TM waves; and loading a layer of negative inductive reactance on the surface of a resistive layer on the Salisbury screen, improving the applicability of large bandwidth, multi-directional, dual polarized radar waves, and deriving the optimal solution under inductive matching. The method disclosed by the present invention can reduce the working frequency of the screen, increase the working bandwidth, greatly reduce the thickness of the screen, and improvethe scope of the phase modulation screen; and the screen helps to reduce the radar reflective cross-section material to achieve the design of an ultra-thin broadband radar absorber structure.

Description

technical field [0001] The invention relates to the field of radar stealth systems, in particular to an improved Salisbury screen and a UHF radar spectrum moving method. Background technique [0002] In order to improve the accuracy of radar stealth system target inspection and tracking, advanced algorithms are often loaded in the signal processing module, and flexible spectrum strategies and high-performance and high-bandwidth radio frequency systems are used, the purpose of which is to achieve a low radar cross-section (Radar Cross Section). -Section, RCS) to identify and track long-range targets. At present, the frequency range of radar has been expanded from 8-12GHz (X frequency band) and 12-18GHz (Ku frequency band) to 2-18GHz. Therefore, it is necessary to propose materials that can work in low-band and high-bandwidth to design radar absorbers. UHF (300MHz~3000MHz) radar can detect the distance, speed, angle and other characteristics of moving targets by using the rel...

Claims

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Application Information

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IPC IPC(8): G06F3/045G06F17/50G01S7/02
Inventor 廖希王洋叶志红邵羽
Owner CHONGQING UNIV OF POSTS & TELECOMM
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