A new model for calculating the input impedance of coax-fed circular microstrip antennas with and without air gaps

Author

Abboud, F. ; Damiano, J.P. ; Papiernik, A.

Author_Institution

Lab. d´´Electron. Nice Univ., Sophia Antipolis, France

Volume

38

Issue

11

fYear

1990

fDate

11/1/1990 12:00:00 AM

Firstpage

1882

Lastpage

1885

Abstract

A model is presented for calculating the input impedance of a probe-fed circular antenna with and without air gaps between the substrate and the ground plane. It is based on the cavity method, the dynamic permittivity constant (to take into account the influence of the fringing field at the edge of radiating element), and the resonant parallel R-L-C circuit with an inductive reactance. Numerical results are shown to agree well with experimental ones. The model is well suited for computer-aided design

Keywords

antenna feeders; antenna theory; electric impedance; microstrip antennas; air gaps; cavity method; coax-fed circular microstrip antennas; computer-aided design; dynamic permittivity constant; fringing field; ground plane; inductive reactance; input impedance; model; numerical results; probe-fed circular antenna; radiating element; resonant parallel R-L-C circuit; substrate; Air gaps; Capacitance; Coaxial components; Dielectric substrates; Impedance; Microstrip antennas; Permittivity; RLC circuits; Resonance; Resonant frequency;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.102754

Filename

102754