Advanced Cavity Filter Tuning Methodology Using Photoconductive Polymers

同轴腔体滤波器，用于工作在108-138 MHz频段的射频前端，选择性地抑制干扰信号和边带噪声的co-located发射机上的紧密间隔的接收机，从而保护通信免受干扰，虚假信息，或噪音。商业上可用的设备是机械调谐的。本项目介绍了一种新的电基自动调谐同轴滤波器，它可以实现高效和自动滤波功能。其目的是利用部署的光电导聚合物，在光的存在下改变其在腔体滤波器内的特性;因此，将其状态从半导体转换为良导体。所设计的高Q原型应满足预期的规格，如温度变化处理从-10到+60 oC和插入损耗小于3 dB。

Coaxial cavity filters, for RF front-ends operating in the 108-138 MHz band, selectively suppress interferingsignals and sideband noise of co-located transmitters on closely spaced receivers thus, protecting thecommunications from interference, false information, or noise. Commercially available devices aremechanically tuned. This project introduces a new electrical-based auto-tuned coaxial filter, which enables anefficient and automatic filtering functionality. The aim is to take advantage of deployed photoconductivepolymers that change their properties within the cavity filter in the presence of light; hence, switching theirstatus from dielectrics to good conductors. The designed high-Q prototype should meet desired specificationssuch as a temperature variation handling from -10 to +60 oC and an insertion loss less than 3 dB.