微波六端口反射计仿真设计

Designing of a six-port reflectometer

六端口反射计在微波阻抗与网络参量测量方面有着很重要的地位。该文介绍了一个工作于要求频段(9-10GHz)内的六端口反射计的设计方案,通过对反射计的S参数进行分析确立设计指标;依据这一指标,该文首先通过LSBRM方法确定波导网络的内半径及中心金属轴半径;进而采用频移法来确定渐变线的大端的高度;最后用渐变线分割的方法和数值积分的算法确定了波导渐变线的长度L,完成方案的设计;对设计好的反射计经测量检验,该反射计在9-10GHz频带内的最小衰减可达到-20dB,满足设计指标的要求。该文提供的方法,同样适用于其他频段内工作的反射计的设计,对相关科研工作人员具有一定的参考价值。

The study has shown to design a symmetrical five - port waveguide junction working in the bandwidth, which is from 9GHz to 10GHz. For the five - port waveguide junction properly works in a six - port reflect meter, do the reflection coefficient looking into anyone port be less than 0.1 （SH 〈 0.1 ） in the bandwidth. The study has applied the frequency bandwidth move, the cutting taper apart method and the mathematic analysis to design a symmetrical five - port waveguide junction.