Title :
Design of high Q TE01 mode ring DR cavity filters with cross-couplings
Author :
Wu, Jianwei ; Hao, Qing ; She, Jingzhao ; Feng, Zhenghe
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
TE01 mode ring DR cavity for the design of cross-coupled filters is described. A mode matching program has been written to compute resonant frequencies. Mode charts for a ring dielectric resonator in a cylindrical enclosure are presented at about 6GHz that allows the optimum ring DR cavity geometry to be found. The practical realization of the filter is discussed in detail. The focus is on the design of filter couplings, including input/output port couplings, direct inductive couplings, inductive and capacitive cross-couplings. A cross-coupled six-pole bandpass filter is built and shows a great improvement of frequency selectivity over the conventional elliptic function filters.
Keywords :
band-pass filters; coupled circuits; dielectric resonator filters; high-pass filters; network synthesis; bandpass filter; cross-coupled filter; cross-coupled six-pole bandpass filter; cylindrical enclosure; frequency selectivity; high Q TE01 mode ring DR cavity filter; input/output port coupling; mode matching program; resonant frequencies; ring dielectric resonator cavity; Band pass filters; Dielectrics; Digital communication; Digital filters; Electromagnetic fields; Electromagnetic waveguides; Microwave filters; Resonant frequency; Resonator filters; Tellurium;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1606283
