Analysis of a thin slot discontinuity in the reference plane of a microstrip structure

Author

Kouki, Ammar B. ; Mittra, Raj ; Chan, Chi Hou

Author_Institution

Dept. of Electr. & Comput. Eng., Ecole Polytech., Montreal, Que., Canada

Volume

41

Issue

8

fYear

1993

fDate

8/1/1993 12:00:00 AM

Firstpage

1356

Lastpage

1362

Abstract

This paper presents a perturbational approach based upon the spectral domain technique for the analysis of the discontinuity effects introduced by a thin slot in the ground plane of a microstrip line. The discontinuity problem is formulated in terms of the unknown slot field by using the notion of equivalent half-space problems, using a new rigorous procedure for deriving the TE-TM decomposition of the fields and equivalent transmission line models. The perturbation current on the infinite microstrip is computed once the electric field in the slot has been derived, and an equivalent circuit for the discontinuity is obtained from this perturbation current for the low-frequency regime. Computed results are presented and compared to the measured data

Keywords

S-parameters; equivalent circuits; microstrip lines; perturbation techniques; spectral-domain analysis; waveguide theory; S-parameters; TE-TM decomposition; equivalent circuit; equivalent half-space problems; equivalent transmission line models; ground plane; low-frequency regime; microstrip line; perturbation current; perturbational approach; reference plane; slot field; spectral domain technique; thin slot discontinuity; Distributed parameter circuits; Equivalent circuits; Frequency; Geometry; Laboratories; Microstrip antennas; Slot antennas; Transmission line discontinuities; Transmission line matrix methods; Transmission line measurements;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.241675

Filename

241675