Antenna Designer´s Notebook-similarities in the design equations for rectangular and circular patches

Author

Mahony, John D.

Author_Institution

British Aerosp., Stevenage, UK

Volume

33

Issue

5

fYear

1991

fDate

10/1/1991 12:00:00 AM

Firstpage

51

Lastpage

54

Abstract

The transcendental equations, which arise in the cavity-model of patch analyses, are reexamined. It is shown that when the radiation quality factor is not too small, useful approximations to the ensuing design equations may be obtained in a format common to both types of patch. To achieve this, it is assumed that natural loss-tangent effects in the substrate may be neglected. An emphasis is placed on the role of the cavity-wall conductance/susceptance ratio. It is important that a value for this parameter be selected with care in cases requiring a wideband frequency response

Keywords

antenna theory; microstrip antennas; cavity-model; cavity-wall conductance/susceptance ratio; circular patches; design equations; loss-tangent effects; patch analyses; radiation quality factor; rectangular patches; substrate; transcendental equations; wideband frequency response; Aerospace engineering; Artificial satellites; Design engineering; Dielectric substrates; Equations; Geometry; Impedance; Payloads; Q factor; Resonant frequency;

fLanguage

English

Journal_Title

Antennas and Propagation Magazine, IEEE

Publisher

ieee

ISSN

1045-9243

Type

jour

DOI

10.1109/74.97950

Filename

97950