A comparison of some low cost laminates for antennas operating in the 2.45 GHz ISM band

Author

Ammann, Max J.

Author_Institution

Dept. of Electron. & Commun. Eng., Dublin Inst. of Technol., Ireland

fYear

1998

fDate

35850

Firstpage

42430

Lastpage

42434

Abstract

An evaluation of some low-cost laminates suitable for microstrip patch antennas is presented. Criteria for the selection of substrates for antenna fabrication are given careful consideration. A coaxial-probe fed linearly-polarized rectangular microstrip patch operating at a frequency of 2.45 GHz was fabricated on four different low cost laminates. The substrates used were polyester, epoxy glass (FR-4), a ceramic filled PTFE composite and a woven glass-reinforced hydrocarbon and ceramic thermoset material. Material properties are discussed and the antenna performances are evaluated and compared to one fabricated on a thick glass-loaded microfiber PTFE substrate. An evaluation of some inexpensive microstrip antenna CAD packages, which employ closed-form expressions based on transmission-line and cavity models, is also given. These models ignore the diffraction effects of a finite ground-plane

Keywords

microstrip antennas; 2.45 GHz; CAD packages; ISM band; UHF; antenna fabrication; antenna performance; cavity model; ceramic filled PTFE composite; ceramic thermoset material; closed-form expressions; coaxial-probe fed patch antenna; epoxy glass substrate; finite ground-plane; frequency; glass-loaded microfiber PTFE substrate; linearly-polarized rectangular microstrip patch; low cost laminates; material properties; polyester substrate; transmission-line model; woven glass-reinforced hydrocarbon;

fLanguage

English

Publisher

iet

Conference_Titel

Low Cost Antenna Technology (Ref. No. 1998/206), IEE Colloquium on

Conference_Location

London

Type

conf

DOI

10.1049/ic:19980079

Filename

667013