114.3~123 GHz六阶带通滤波器设计

基于经典的半波长滤波器理论，设计了一种用于太赫兹通信系统的半波长磁耦合矩形波导带通滤波器。仿真结果表明，该滤波器中心频率为118 GHz，通带为114.3~123 GHz，相对带宽为7.4%；在131.8 GHz处的抑制度大于30 dB，通带插入损耗小于0.8 dB，通带回波损耗大于20 dB。经过实物测试，测试结果与仿真结果基本一致。这种滤波器的结构简单，制作难度低。

Design of band-pass filter for terahertz communication systems

Based on the classical half-wavelength filter theory, a half-wavelength magnetically coupled rectangular waveguide bandpass filter is studied and designed for terahertz communication system. The simulation results show that the center frequency of the filter is 118 GHz; the passband is 114.3~123 GHz; the relative band-width is 7.4%; the attenuation at 131.8 GHz is more than 30 dB; the passband insertion loss is less than 0.8 dB; and the pass-band return loss is more than 20 dB. After the physical test, the test results are basically consistent with the simulation results. This filter bears a simple structure and a low fabrication difficulty.