The mode features of an annular sector microstrip antenna

Author

Sultan, Mohammed A. ; Tripathi, Vijai K.

Author_Institution

Dept. of Electr. & Comput. Eng., Oregon State Univ., Corvallis, OR, USA

Volume

38

Issue

2

fYear

1990

fDate

2/1/1990 12:00:00 AM

Firstpage

265

Lastpage

269

Abstract

A rigorous analysis of the features of the modes of an annular sector printed microstrip antenna is presented. General expressions for its radiation field are derived by using the cavity model. The expressions are used to study the radiation patterns, radiation peak in the broadside direction, and beamwidth of different structures for various sector angles, widths, and modes of excitation. This includes the special cases of quarter-, half-, three-quarters-, and ideal-gap open-ring structures. Compared to a closed ring, the results indicate that the TM₁₂ mode is superior to the TM₁₁ mode with regard to the radiation properties in the annular sector as its angle approaches 2π

Keywords

antenna radiation patterns; microstrip antennas; TM mode; annular sector microstrip antenna; broadside direction; cavity model; closed ring; different structures beamwidth; excitation modes; half ring; ideal-gap open-ring structures; quartering; radiation field; radiation patterns; radiation peak; sector angles; three quarters ring; widths; Antenna radiation patterns; Boundary conditions; Dielectric substrates; Equations; Genetic expression; Magnetic separation; Microstrip antennas; Permittivity; Receiving antennas; Resonant frequency;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.45130

Filename

45130