Title :
An original method of capacitive coupling in waveguide filters
Author :
Zhang, Xiaoqin ; Jia, Baofu ; Tan, Chenghuan ; Zhu, Wei ; Yang, Xiaofeng
Author_Institution :
Inst. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, a novel method to implement capacitive coupling in planar (H-plane) waveguide filters is presented. It is shown that the signs of the coupling coefficients are, in certain situations, reversed from the predictions of the simpler given model. The principles of the change in the signs of coupling coefficients are presented and investigated in detail. A 3-pole H- plane example filter with a transmission zero (TZ) below the passband is designed to demonstrate the validity of the introduced method.
Keywords :
band-pass filters; planar waveguides; waveguide filters; H-plane waveguide filter; TZ; capacitive coupling; passband filter; planar waveguide filter; transmission zero; Band pass filters; Couplings; Filtering theory; Integrated circuit modeling; Microwave filters; Passband; Resonator filters; bandpass filters; capacitive cross coupling; spurious resonance; transmission zeros (TZs);
Conference_Titel :
Electronics, Communications and Control (ICECC), 2011 International Conference on
Conference_Location :
Ningbo
Print_ISBN :
978-1-4577-0320-1
DOI :
10.1109/ICECC.2011.6067764
