Modelling of arbitrarily shaped MMIC and hybrid planar circuits with a mixed waveguide model boundary integral method

Author

Abdulnour, J. ; Wu, K. ; Akyel, C. ; Marchildon, L. ; Bosisio, R.G.

Author_Institution

Dept. de Genie Electr., Ecole Polytech. de Montreal, Que., Canada

Volume

141

Issue

6

fYear

1994

fDate

12/1/1994 12:00:00 AM

Firstpage

495

Lastpage

500

Abstract

A novel numerical procedure for analysing discontinuities in MMIC and hybrid planar circuits is proposed. It is based on a combination of boundary elements and a planar waveguide model. Shunt posts are taken into account in the model by explicit modal field expansion. This approach employs fewer nodal points than either the finite-element or boundary-element method and allows the direct determination of the S parameters of circuits. It can effectively be applied to the analysis of generalised discontinuity and multiport configurations involving rectangular, circular or arbitrarily shaped boundaries with metallic or dielectric posts. A number of microstrip discontinuity problems are calculated by this method to demonstrate its efficiency. The proposed technique is validated through comparisons between theoretical and experimental results

Keywords

MMIC; S-parameters; boundary integral equations; circuit theory; hybrid integrated circuits; microstrip discontinuities; multiport networks; waveguide couplers; waveguide theory; MMIC planar circuits; S parameters; arbitrarily shaped boundaries; boundary elements; circular boundaries; dielectric posts; discontinuities; hybrid planar circuits; metallic posts; microstrip discontinuity problems; mixed waveguide model boundary integral method; modal field expansion; multiport configurations; numerical procedure; planar waveguide model; rectangular boundaries; shunt posts;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:19941535

Filename

340213