Resonant frequency of higher order modes for circular microstrip antennas

Author

Rajanish ; Vedavathy, T.S.

Author_Institution

Dept. of Electr. Commun. Eng., Indian Inst. of Sci., Bangalore, India

Volume

3

fYear

1999

fDate

1999

Firstpage

936

Abstract

A modified expression for calculating the resonant frequency for higher order modes of a circular microstrip antenna is presented in this paper. It is found that by using the cavity model analysis to calculate the frequency for higher order modes, the frequency difference between the theoretical and measured values increases as the order of the mode increases. This discrepancy is eliminated by generalizing the expression for resonant frequency in the cavity model to include the mode order and thus modifying the effective capacitance used in the analysis. The theoretical results obtained are in excellent agreement with the experimental values

Keywords

antenna theory; capacitance; microstrip antennas; resonance; annular ring type; cavity model analysis; circular microstrip antennas; disc type; effective capacitance; higher order modes; mode order; resonant frequency; Antenna measurements; Capacitance measurement; Dielectric substrates; Frequency measurement; Geometry; Global Positioning System; Microstrip antennas; Microstrip resonators; Patch antennas; Resonant frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 1999 Asia Pacific

Print_ISBN

0-7803-5761-2

Type

conf

DOI

10.1109/APMC.1999.833749

Filename

833749