Title :
Evanescent-mode coupling of dual-mode rectangular waveguide filters
Author :
Chang, Hsin-Chin ; Zaki, Kawthar A.
Author_Institution :
Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA
fDate :
8/1/1991 12:00:00 AM
Abstract :
A novel coupling method for dual-mode rectangular waveguide filters is presented and analyzed. Unequal coupling between dual-mode pairs of rectangular cavities is achieved without the need of an iris. This method replaces the iris completely while offering a practical, flexible, and wide range of couplings. The mode matching method is used in the analysis and its accuracy is verified by experiments. A four-pole dual-mode elliptic function filter using this new coupling method was built and tested. Results show excellent agreement with the analysis
Keywords :
microwave filters; rectangular waveguides; waveguide components; coupling method; dual-mode rectangular waveguide filters; evanescent-mode coupling; four-pole dual-mode elliptic function filter; mode matching method; rectangular cavities; Coupling circuits; Fasteners; Frequency; Iris; Microwave filters; Mode matching methods; Rectangular waveguides; Resonator filters; Testing; Waveguide discontinuities;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
