Title :
Microstrip circuit applications of high-Q open microwave resonators
Author :
Stephan, Karl D. ; Young, Song-Lin ; Wong, Sai-chu
Author_Institution :
Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA
fDate :
9/1/1988 12:00:00 AM
Abstract :
An open microwave resonator can be formed above a planar microstrip substrate by suspending a spherical reflector above it. A theory is developed to account for the coupling between such an open resonator mode and a microstrip line. The open resonator is shown to have useful circuit properties similar to a dielectric resonator, but with the potential of efficient operation well into the millimeter-wave range. Experimental confirmation of the theory is demonstrated by a scale model of a microstrip-based single-pole bandpass filter, which shows a loaded Q of 860 and a minimum loss of 0.8 dB±0.4 dB at 10 GHz
Keywords :
Q-factor; cavity resonators; equivalent circuits; microwave devices; strip line components; 0.8 dB; 10 GHz; EHF; circuit properties; coupling; high-Q; microstrip line; millimeter-wave range; open cavity; open microwave resonators; planar microstrip substrate; scale model; single-pole bandpass filter; suspended spherical reflector; Coupling circuits; Dielectric substrates; Hybrid integrated circuits; MMICs; Microstrip resonators; Microwave circuits; Microwave integrated circuits; Millimeter wave circuits; Millimeter wave technology; Resonator filters;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
