Miniature stub and filter designs using the microshield transmission line

Author

Weller, Thomas M. ; Katehi, L.P.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

fYear

1995

fDate

16-20 May 1995

Firstpage

675

Abstract

This paper presents new CPW-type stub and filter configurations which are useful approaches for compact microwave circuit design. It is shown that conventional open- and short-end quarter wavelength stubs can be shortened by a factor of three by folding the center conductor. Also, narrowband open-end stubs are demonstrated which have thin-film overlay capacitors integrated across the stub sections. In this work the circuits have been implemented using the microshield transmission line, a geometry in which a 1.4 /spl mu/m-thick dielectric membrane supports coplanar conducting lines virtually in free-space. The new stub configurations, however, are also suitable for standard substrate-supported CPW.<>

Keywords

coplanar waveguides; waveguide components; waveguide filters; 0.4 dB; 0.5 dB; 1.25 dB; 25 GHz; 30 GHz; CPW-type filter configuration; CPW-type stub configuration; center conductor folding; compact microwave circuit design; coplanar conducting lines; dielectric membrane; folded series stubs; metallization pattern; microshield transmission line; narrowband open-end stubs; open-end quarter wavelength stubs; short-end quarter wavelength stubs; substrate-supported CPW; thin-film overlay capacitors; Capacitors; Circuit synthesis; Conductors; Coplanar transmission lines; Dielectric thin films; Distributed parameter circuits; Geometry; Microwave filters; Narrowband; Thin film circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1995., IEEE MTT-S International

Conference_Location

Orlando, FL, USA

ISSN

0149-645X

Print_ISBN

0-7803-2581-8

Type

conf

DOI

10.1109/MWSYM.1995.406017

Filename

406017