A bandpass filter with TE{sub}01 σ-mode dielectric resonators using a simple coupling-probe circuit for attenuation poles

摘要

A simple circuit consisting of open-circuited probes and a transmission line has been proposed as a method to obtain attenuation poles in a TE01 δ -mode dielectric bandpass filter. Its design procedure and structure are less complex than other methods such as dial-mode operation for making attenuation poles. In this paper, the design procedure based on an equivalent-circuit analysis is described, and a result of an experiment on a prototype 12GHz-band 4-stage BPF is shown.