Abstract
The radar jamming technology has been studied in this paper mainly, which uses the antenna synthetic wave to generate phase distortion at the signal reception to carry out angle measuring jamming, such as traditional cross-eye jamming. However, cross-eye jamming has strict parameter tolerance. To improve the tolerance range of the phase parameters, a multiple antennas synthetic false target electromagnetic jamming technique is proposed in this paper, which has a wider phase parameter tolerance and jamming range. The jamming method can be regarded as an improved cross eye jamming method. We can conclude that this method can generate a “false target” in space and far away from the carrier which has jamming system, which mislead the radar to point to “false target” rather than to real targets. A jamming system with three jamming antennas was considered as the research object. The position of “false target” can be controlled casually by adjusting the feed amplitude and phase of the three antennas simultaneously. The jamming mathematical model of synthetic false target with three antenna emitters is constructed under the sum and difference channel transceiver mechanism of radar in this paper. The error angle and synthetic gain of the three jamming antennas were derived. The phase parameter tolerance of the proposed method was obtained- and compared with cross-eye jamming. A rigorous mathematical derivation is proposed in this paper, and the superiority of the multiple antennas synthetic false target jamming method is verified.
Highlights
The angle measurement deception jamming method has been investigated, and we find that Cross-eye jamming is an angle measurement jamming method based on the principle of angular scintillation [1],[2]; Traditional cross-eye interference uses two antennas fed with the same amplitude but a phase difference of 180 degrees
More stable interference effect in real application. Even if it is affected by many factors, the jamming antenna can’t get accurate feed, the method we proposed in this paper can still complete the interference due to the wide phase parameter tolerance, which is the advantage of the method proposed in this paper
The main contribution of this article is a new jamming method for angle measurement error had been established, which has a wider phase parameter tolerance to ensure the successful jamming with a high probability in practical application
Summary
The angle measurement deception jamming method has been investigated, and we find that Cross-eye jamming is an angle measurement jamming method based on the principle of angular scintillation [1],[2]; Traditional cross-eye interference uses two antennas fed with the same amplitude but a phase difference of 180 degrees. The antenna layout of the interference loop is optimized by using DOA information, and the influence of amplitude and phase parameters on the cross-eye jamming effect is analyzed. The echo signal and jamming signal received by radar antenna beams are analyzed; A scientific mathematical model of jamming error angle for multiple antennas jamming is established; The tolerance range of multi antenna interference phase parameters is analyzed. It is proved that the false target position has been controlled effectively by adjusting multiple antennas feed parameters, and the superior of proposed method in phase parameter tolerance to crosseye jamming has been proved. The example is that cross-eye system jam phase comparison angle measuring radar has been proposed in Fig. (b). The following part is the theoretical modeling and mathematical derivation of multi antenna synthetic false target interference proposed in this paper
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