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

Volume

36

Issue

9

fYear

1988

fDate

9/1/1988 12:00:00 AM

Firstpage

1319

Lastpage

1327

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;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.3678

Filename

3678