Perturbation formulation for nearly-degenerate microstrip dipole eigenmodes

Author

Hanson, G.W. ; Nyquist, D.P.

Author_Institution

Dept. of Electr. Eng., Michigan State Univ., East Lansing, MI, USA

fYear

1991

fDate

24-28 June 1991

Firstpage

80

Abstract

System eigenmodes of N-coupled, nearly degenerate microstrip dipoles are investigated through a singularity-expansion-based perturbation formulation. This method is based on integral-operator techniques employing rigorous dyadic Green´s functions for the layered microstrip environment. Mutual coupling between microstrip antennas has been previously accounted for by full-wave formulations, and similar full-wave methods provide a comparison to this approximate formulation. System eigenmodes are found to form symmetry states about the isolated dipole eigenmode. The special case of N=2 coupled dipoles results in symmetric/antisymmetric coupling, which can be separated analytically.<>

Keywords

Green´s function methods; antenna theory; dipole antennas; eigenvalues and eigenfunctions; microstrip antennas; perturbation techniques; coupled dipoles; dyadic Green´s functions; integral-operator techniques; layered microstrip environment; microstrip antennas; nearly-degenerate microstrip dipole eigenmodes; singularity-expansion-based perturbation formulation; symmetric/antisymmetric coupling; symmetry states; Art; Dipole antennas; Frequency; Integral equations; Microstrip antennas; Mutual coupling; Numerical analysis; Permittivity; Refractive index; Scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1991. AP-S. Digest

Conference_Location

London, Ontario, Canada

Print_ISBN

0-7803-0144-7

Type

conf

DOI

10.1109/APS.1991.174778

Filename

174778