Arbitrarily-Shaped Slot-Coupled Microstrips and Their Applications in Microwave Integrated Circuits and Antennas

1 November 1996

journal article
research article
Published by Taylor & Francis in Electromagnetics

Vol. 16 (6) , 611-632
https://doi.org/10.1080/02726349608908504

Abstract

The mixed-potential integral equation (MPIE) is solved by the method of moments in order to investigate arbitrarily-shaped slot-coupled microstrip discontinuity problems. A concise expression of the mutual coupling matrix element is utilized to assure numerical efficiency and accuracy. Comparison between this MPIE and other moment methods (such as MFIE and EFIE) is also carried out and discussed. In order to validate this modeling tool, a circularly polarized dual slot-coupled patch antenna and a single slot-coupled directional coupler arc investigated. Good agreement between numerical results and measurement is achieved. Two examples of dual slot-coupled patch antenna and annular ring slot antenna with microstrip line feed arc designed to provide desired circularly polarized radiation. In addition, a weak coupling slot-coupled directional coupler is designed by utilizing a pair of circular slots. Good performance for directivity, isolation, and return loss is obtained.

Keywords

This publication has 12 references indexed in Scilit:

Mutual coupling between microstrips through a printed aperture of arbitrary shape in multilayered media
IEEE Microwave and Guided Wave Letters, 1996
Modeling Microstrip Line Fed Slot Antennas with Arbitrary Shape
Electromagnetics, 1995
Mixed potential integral equation technique for hybrid microstrip-slotline multilayered circuits using a mixed rectangular-triangular mesh
IEEE Transactions on Microwave Theory and Techniques, 1995
Waveguide excited microstrip patch antenna-theory and experiment
IEEE Transactions on Antennas and Propagation, 1994
Broadband vertical interconnects using slot-coupled shielded microstrip lines
IEEE Transactions on Microwave Theory and Techniques, 1992
Full-wave analysis of aperture-coupled microstrip lines
IEEE Transactions on Microwave Theory and Techniques, 1991
Triplate-type planar antenna and its array
Electronics and Communications in Japan (Part I: Communications), 1990
Quasi-Lumped Element Quadrature Coupler Design
Microwave and Optical Technology Letters, 1989
Potential integrals for uniform and linear source distributions on polygonal and polyhedral domains
IEEE Transactions on Antennas and Propagation, 1984
Electromagnetic scattering by surfaces of arbitrary shape
IEEE Transactions on Antennas and Propagation, 1982