Leakage suppression in coplanar waveguide circuits by patterned backside metallization

Author

Hesselbarth, J. ; Vahldieck, R.

Author_Institution

Lab. for Electromagnetic Fields & Microwave Electron., Swiss Federal Inst. of Technol., Zurich, Switzerland

Volume

3

fYear

1999

fDate

13-19 June 1999

Firstpage

871

Abstract

Microwave circuits based on coplanar offer advantages compared to microstrip-based designs, but also introduce unwanted coupling or radiation effects due to the excitation of surface waves or parallel plate modes. Special measures must be introduced to suppress these modes. This paper illustrates the effect of substrate waves on coupling between parts of the circuitry. It details the influence of resonances of the substrate modes on this unwanted coupling. A method is proposed to suppress substrate modes and is supported by experimental results.

Keywords

coplanar waveguides; metallisation; microwave circuits; parallel plate waveguides; waveguide discontinuities; coplanar waveguide circuits; leakage suppression; microwave circuits; parallel plate modes; patterned backside metallization; radiation effects; substrate waves; surface waves; Coplanar waveguides; Coupling circuits; Dielectric substrates; Electromagnetic waveguides; Flexible printed circuits; Metallization; Microstrip; Microwave circuits; Resonance; Surface waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1999 IEEE MTT-S International

Conference_Location

Anaheim, CA, USA

Print_ISBN

0-7803-5135-5

Type

conf

DOI

10.1109/MWSYM.1999.779525

Filename

779525