Research on a C-band radar receiver protection technology
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摘要: 随着战场环境日益复杂，尤其是高对抗环境下，对现有各类装备均产生了极大威胁。设计了一款C波段雷达接收机保护器，采用充气微波开关管+波导同轴转换的结构设计，创新性地提出将固态限幅器芯片融合在波导同轴转换内部，限幅芯片采用级联的形式，提高了微带限幅器的承受功率。实现接收机保护器耐受功率10 MW以上，响应时间5 ns以内，不仅可用于雷达发射期间接收机防护，还可应对外部电磁干扰、高功率微波攻击。Abstract: As the battlefield environment becomes increasingly complex, especially in high-confrontation environments, it poses a great threat to all types of existing equipment. This article designs a C-band radar receiver protector, which adopts the structural design of inflatable microwave switch tube + waveguide coaxial conversion, innovatively integrates the solid-state limiter chip into the waveguide coaxial convertor, while the limiting chip adopts a cascaded form to increase the power of the microstrip limiter. With a power resistance of over 10 MW and a response time of less than 5 ns, the protector is not only used for receiver protection during radar transmission, but also can cope with external electromagnetic interference and high-power microwave attacks.
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图 1 C波段雷达接收机保护器结构示意图
Figure 1. Schematic diagram of the C-band radar receiver protector structure
图 3 接收机保护器电压驻波比仿真计算结果
Figure 3. Simulation result of voltage standing wave ratio of receiver protector
表 1 测试结果
Table 1. Results of tests
voltage standing wave ratio total insertion loss/dB response time/ns peak leakage power/mW recovery time/µs sample tube 1# ≤1.35 ≤0.8 4 ≤30 ≤0.7 sample tube 2# ≤1.37 ≤0.7 4 ≤35 ≤0.6 
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