Electronics Optics & Control, Volume. 32, Issue 5, 91(2025)
Coexistence Technology of High Transmittance of UAV Front Window and Ku Band RCS Reduction
In order to solve the problem that the Radar Cross Section (RCS) of the front photoelectric pod of a UAV is too large under the condition of maintaining high optical transmittance, a multi-layer, mesh-type, meta-surface is proposed. According to the equivalent theoretical circuit model of the cross-shaped metal mesh, the influence of electrical impedance on the electromagnetic shielding effect is analyzed, and the cross-shaped mesh is extended to a three-layer, mesh-type, meta-surface structure, and the equivalent circuit model is established. The simulation results show that the mesh-type meta-surface has a smaller RCS than the ordinary periodic mesh. Moreover, this multi-layer structure is helpful for integrating the RCS reduction structure into the front photoelectric pod of the UAV. Finally, the RCS test of the sample verifies the effectiveness of the proposed multi-layer, mesh-type, meta-surface structure, and achieves a positive-incidence RCS reduction of 10 dB in the frequency band of 12~14 GHz under the condition of high optical transmittance.
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WANG Anning, ZHANG Hui, WANG Yelong, QI Feng. Coexistence Technology of High Transmittance of UAV Front Window and Ku Band RCS Reduction[J]. Electronics Optics & Control, 2025, 32(5): 91
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Received: Apr. 11, 2024
Accepted: May. 13, 2025
Published Online: May. 13, 2025
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