Interference method for inverse synthetic aperture radar 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: 2019-11-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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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

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  • Interference method for inverse synthetic aperture radar based on FDA antenna
  • Interference method for inverse synthetic aperture radar based on FDA antenna
  • Interference method for inverse synthetic aperture radar based on FDA antenna

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Embodiment Construction

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

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

[0042] System parameter setting: Radiation source frequency f of the first array element of the frequency control 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 rotational angular velocity ω=0.06rad / s, coherent imaging time T a =0.25s, distance from radar to air target||R R || E =50km, distance from jammer to target||R J || E =30km, bistatic angle α=0°, ISAR resolution is 0.15m×0.97m, observation scene is 800m×400m, air target size is 19m×20m.

[0043] image 3 Is the...

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Abstract

The invention belongs to the technical field of radar interference and countermeasures, and relates to an interference method for an inverse synthetic aperture radar based on an FDA antenna. Accordingto the method of the invention, based on a phased array antenna, a frequency diverse array additionally adds a frequency increment that is far less than a working carrier frequency to an emission signal on adjacent array elements, an accompanying fly jammer equipped with a frequency diverse array antenna transmits an interference signal to a protected target, and the interference signal is then scattered by a target to an 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 all-weather, all-weather, long-distance detection and identification of non-cooperative moving targets, and has a high imaging resolution, so it is used in the military field, especially air target recognition , anti-missile and other aspects are playing 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. Jamming to ISAR is mainly divided into two categories: suppression and deception. Suppressive jamming mainly uses Gaussian white noise to generate jamming signals. This method requires a relatively large transmit power of the jammer, and it is ea...

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Application Information

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Patent Type & Authority Applications(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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