Mixed Electric and Magnetic Coupling Design Based on Coupling Matrix Extraction

This paper proposes a design and fine-tuning method for mixed electric and magnetic coupling filters.It derives the quantitative relationship between the coupling coefficients(electric and magnetic coupling,i.e.,EC and MC)and the linear coefficients of frequencydependent coupling for the first time.Different from the parameter extraction technique using the bandpass circuit model,the proposed approach explicitly relatesEC and MC to the coupling matrix model.This paper provides a general theoretic framework for computer-aided design and tuning of a mixed electric and magnetic coupling filter based on coupling matrices.An example of a 7th-order coaxial combline filter design is given in the paper,verifying the practical value of the approach.

基于频变耦合带通滤波器的小型化无线温度传感器

电力系统中,高压开关柜、电缆接头等电力设备发生故障时,常伴随温度的异常升高,对温度进行实时监测,可及时发现异常情况,减少事故的发生。本文提出一种基于频变耦合(FDC)带通滤波器的小型化温度传感器。工作于毫米波频段,利用水的介电常数随温度变化的特性,可以有效感知温度变化,实现对环境温度的无线实时监测。仿真结果表明:该传感器对温度变化敏感,验证了其可行性。