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An Inverse Synthetic Aperture Radar Jamming Method Based on FDA Antenna

An inverse synthetic aperture, radar jamming technology, applied in the reflection/re-radiation of radio waves, radio wave measurement systems, instruments, etc., can solve problems such as low jamming efficiency, and achieve the effect of improving jamming efficiency

Active Publication Date: 2022-08-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of low jamming efficiency of the traditional spoofing jamming method, the present invention proposes a method for jamming ISAR imaging based on a new system of frequency control array antennas

Method used

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  • An Inverse Synthetic Aperture Radar Jamming Method Based on FDA Antenna
  • An Inverse Synthetic Aperture Radar Jamming Method Based on FDA Antenna
  • An Inverse Synthetic Aperture Radar Jamming Method Based on FDA Antenna

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Embodiment Construction

[0040] The effectiveness of the present invention will be described below with reference to the accompanying drawings and simulation examples.

[0041] According to the signal model of the present invention, use Matlab (a computer algorithm language) to carry out simulation verification, and the specific simulation parameters are as follows:

[0042] System parameter setting: the radiation source frequency f of the first element of the frequency-controlled array antenna 0 =10GHz, frequency increment Δf=8MHz, array element spacing d=λ / 2, number of array elements N=7, signal bandwidth B r =1GHz, pulse width T p =20us, pulse repetition frequency PRF=1kHz, target rotation angular velocity ω=0.06rad / s, coherent imaging time T a =0.25s, the distance from the radar to the air target ||R R || E =50km, the distance from the jammer to the target ||R J || E =30km, bistatic angle α=0°, ISAR resolution is 0.15m×0.97m, observation scene is 800m×400m, and air target size is 19m×20m.

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Abstract

The invention belongs to the technical field of radar interference countermeasures, and relates to an inverse synthetic aperture radar interference method based on an FDA antenna. In the method of the invention, on the basis of the phased array antenna, the frequency-controlled array adds a frequency increment far smaller than the working carrier frequency to the transmitted signal on the adjacent array elements, and the accompanying jammer equipped with the frequency-controlled array antenna The jamming signal is transmitted to the protected target, and then scattered by the target to the ISAR receiver.

Description

technical field [0001] The invention belongs to the technical field of radar interference countermeasures, and relates to an inverse synthetic aperture radar interference method based on an FDA antenna. Background technique [0002] Inverse Synthetic Aperture Radar (ISAR, Inverse Synthetic Aperture Radar) has the ability to detect and identify non-cooperative moving targets at all-weather, all-weather, long-distance, and has a high imaging resolution, so it is used in the military field, especially for air target recognition. , anti-missile and other aspects play an increasingly important role. At present, the electronic jamming and anti-jamming of ISAR has become a research hotspot in the field of ISAR and electronic countermeasures. There are two main types of ISAR jamming: suppression and deception. Suppressive jamming mainly uses Gaussian white noise to generate jamming signals. This method requires the jammer to have a relatively large transmit power, and it is easy t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/38G01S13/90
CPCG01S7/38
Inventor 宗竹林黄栎冰黄丽梅
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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