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Misleading jamming method based on phase-switched screen

A phase modulation and frequency modulation technology, which is applied in the field of radar jamming, can solve the problems of increasing the probability of jamming systems being discovered and attacked, and achieve the effects of reducing the probability of being detected and attacked, simple production, and high flexibility

Active Publication Date: 2016-12-14
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, due to the need for jammers to actively launch electromagnetic signals, the probability of the entire jamming system being discovered and attacked is also significantly increased.

Method used

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  • Misleading jamming method based on phase-switched screen
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Embodiment Construction

[0034] The applicable object of the present invention is a radar adopting a monopulse angle tracking system. In the following, the method proposed by the present invention will be further explained by taking the X-band radar system as an example in conjunction with the accompanying drawings. Suppose the transmitted signal is center frequency f c =10GHz (λ=3.0cm) chirp signal; bandwidth BW=30MHz; pulse width T p =20us; antenna 3dB beam width 1.4°; vertical distance R=500m from target to receiver, pitch angle α=30°. figure 2 Provide a schematic diagram of misleading interference based on a phase modulation surface including specific parameters (only the pitch direction is considered, and the azimuth direction is the same), the present invention specifically involves the following steps:

[0035] Step 1: According to the radar system parameters to be interfered with and the working principle of the PSS, set the size of the PSS to S×S=20λ×20λ=60cm×60cm, where S is the side leng...

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Abstract

The invention discloses a misleading jamming method based on a phase-switched screen. The trap of a radar angle tracking system is realized through the change of the work state of the phase-switched screen (PSS). The method specifically includes steps: replacing a jammer by the phase-switched screen; setting a modulation frequency and a modulated waveform of the phase-switched screen, and adjusting the work state of a frequency selective surface; and correspondingly controlling the work state of the phase-switched screen according to a power-on sequence and a time interval T of the jammer in the misleading jamming, and finally achieving the goal of misleading an angle measuring system. According to the method, the jamming effect which can be achieved by active jamming is realized through a passive jamming mode, the jammer does not need to actively emit electromagnetic waves, the probability of detection and attack for a jamming system is greatly reduced, and the phase-switched screen is simple in manufacture, short in period, low in cost, easy in popularization and application, high in flexibility, and wide in application range, and can be promoted to other jamming modes, for instance, the phase-switched screen can be used for realizing cross-eye jamming.

Description

technical field [0001] The invention belongs to the field of radar jamming. It specifically involves radar passive deception jamming technology, and furthermore, it proposes a passive misleading jamming method based on phase modulation surface for monopulse angle measurement and tracking system. Background technique [0002] The missile terminal guidance radar generally adopts an advanced monopulse angle tracking system. This angle measurement method only needs one echo pulse to measure all the information of the target angular position. , high angle measurement accuracy and other advantages, the general suppression of jamming and spoofing jamming are difficult to work, how to better achieve effective jamming of monopulse radar has always been a hot spot and difficulty in the field of radar countermeasures. [0003] Existing studies have shown that the effective angle deception jamming of monopulse radar can be implemented through the interference of two (multiple) point so...

Claims

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Application Information

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IPC IPC(8): G01S7/38
CPCG01S7/38
Inventor 冯德军张然徐乐涛傅其祥艾小锋王雪松赵锋解东
Owner NAT UNIV OF DEFENSE TECH
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