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Illustration of four radar beams and three jamming antennas (a) Jamming scene of three antennas to the radar (b). Relationship between the jamming antenna and F1and F2 azimuths of the radar beam (c).
Source publication
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,...
Contexts in source publication
Context 1
... mathematical model was established using two different methods of angle measurement. The jamming scene for the first method is shown in Fig.2(a). where a 1 , a 2 , a 3 is the jamming antenna. ...
Context 2
... signals received by the four radar beams are denoted as E1, E2, E3, and E4. A more detailed image of the jamming radar scene is shown in Fig.2(b). It is worth mentioning that the three jamming antennas are at different baselines. ...
Context 3
... is defined as ϕ i = d i /r; θ i = d i /r, whose dimension is rad. The variable d i (i = 1, 2, 3) is the distance between the jamming antenna a i (i = 1, 2, 3) and T, which is marked in Fig.2(b). r represents the jamming distance. ...
Context 4
... represents the jamming distance. Taking azimuth as an example, a more detailed explanation of the angular relationship is proposed in Fig.2(c). The angle between the direction of the main lobe of the radar beam and radar LOS is (ϕ 0 , θ 0 ). ...
Context 5
... (9) and (10) can be obtained by observing thee geometric relationship in Fig.2(c), which can be used to write the following formula. ...
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Citations
The multi-antenna synthetic false target electromagnetic interference technology has been studied in this paper, which is a kind of glint electromagnetic interference technology. The phase wavefront of any angle distortion can be flexibly synthesized by adjusting the feeding amplitude and phase value of the interference system to complete the interference to the radar. The experimental verification of multi-antenna interference technology is completed, which is based on the mathematical theory of multi-antenna interference technology and the theory of equivalent radiation center. The experimental target is set and the experimental scheme is designed, and the experimental test is completed through the final physical experimental model, which are based on the numerical calculation and electromagnetic simulation results. The feasibility of the multi-antenna interference technology is verified successfully based on the experimental physical test means and experimental analysis conclusion, which verifies that the multi-antenna interference technology can complete the interference at any position in the two-dimensional plane. The test results show that the Triplet system can synthesize the position of the false target beyond 5 times the baseline length of the jamming antennas from the platform center when the jamming distance is 10m and the baseline length of the jamming antennas is 0.2m. Then it has the wide phase parameter tolerance of 0°±20°, 120°±20°, 240°±20°.
