Existence of a leaky dominant mode on microstrip line with an isotropic substrate: theory and measurements

Author

Nghiem, David ; William, Jeffery T. ; Jackson, David R. ; Oliner, Arthur A.

Author_Institution

Dept. of Electr. & Comput. Eng., Houston Univ., TX, USA

Volume

44

Issue

10

fYear

1996

fDate

10/1/1996 12:00:00 AM

Firstpage

1710

Lastpage

1715

Abstract

A newly discovered leaky dominant mode is reported for conventional microstrip line on an isotropic substrate, at higher frequencies. The existence of this leaky mode has been confirmed both numerically and experimentally. This new mode exists independently of, and in addition to, the customary bound dominant mode. It leaks power away from the line into the fundamental TM₀ surface wave of the surrounding grounded substrate, and may therefore be responsible for spurious microstrip circuit performance at higher frequencies. This could have important implications for millimeter-wave circuits

Keywords

current distribution; microstrip circuits; microstrip lines; millimetre wave circuits; spectral-domain analysis; TM₀ surface wave; isotropic substrate; leaky dominant mode; microstrip line; millimeter-wave circuits; spurious microstrip circuit performance; surrounding grounded substrate; Anisotropic magnetoresistance; Circuit optimization; Feeds; Frequency measurement; Helium; Microstrip; Millimeter wave circuits; Stripline; Strips; Surface waves;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.538963

Filename

538963