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介绍了S波段限幅低噪声放大器的一种新的设计方法:为了兼顾噪声性能与体积的要求,创新性的采用了集总参数与分布参数混合匹配的方法。运用ADS仿真软件对结构进行了优化设计,考虑了器件的寄生参数的影响以及器件封装对版图的影响,使仿真结果更接近实际电路。论文首次系统的给出了在放大器调试中常出现的自激问题的解决方法。测试结果表明:采用无源自激励方法设计的前置限幅器能够承受超过400W的脉冲功率冲击,放大器噪声、增益、驻波也很好的达到了预期指标。
A new design method of S-band limiting low-noise amplifier is introduced. In order to meet the requirements of noise performance and volume, a novel method of hybrid matching of lumped parameters and distributed parameters is adopted. Adopting ADS simulation software to optimize the structure of the structure, taking into account the parasitic parameters of the device and the influence of device package on the layout, the simulation results closer to the actual circuit. For the first time, the dissertation gives a solution to the problem of self-excitation that often occurs in amplifier debugging. The test results show that the front limiter designed by passive self-excitation method can withstand the impulse power of more than 400W, and the amplifier noise, gain and standing wave well meet the expected targets.