Broadband meanderline slot spiral antenna

Author

Filipovic, D.S. ; Volakis, J.L.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

Volume

149

Issue

2

fYear

2002

fDate

4/1/2002 12:00:00 AM

Firstpage

98

Lastpage

105

Abstract

A new broadband, cavity-backed slot spiral antenna is proposed. It combines variable growth rates at the centre region for improved high band radiation, with meandering in the outer turns for more efficient low band operation. A detailed characterisation of all antenna components and parameters is provided along with guidelines and recommendations for miniaturisation and realisation. The performance degradation due to cavity resonances is discussed and their suppression is also demonstrated. The developed design has broadband UHF to S-band operation with up to 20 dB gain improvement at 250 MHz using a 15 cm aperture. Using the same design concept, 45 cm apertures are realised and their operation from VHF to S-band is demonstrated

Keywords

UHF antennas; VHF antennas; cavity resonators; slot antennas; spiral antennas; 250 to 4000 MHz; S-band; UHF; VHF; antenna components; broadband meanderline slot spiral antenna; cavity resonances; cavity-backed slot spiral antenna; growth rates; low band operation; miniaturisation; performance degradation;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:20020284

Filename

1019775