Dual-spiral slot antennas

Kazuhide Hirose, H. Nakano

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Two types of dual-spiral slot antennas characterized by their simple feed are studied; one is a bidirectional radiation type (Bi-DSS) and the other is a undirectional type (Uni-DSS). The radiation characteristics of the Bi-DSS are evaluated using the numerically determined magnetic current distribution. It is found that a travelling wave magnetic current distribution becomes dominant for a particular range of slot-arm lengths, contributing to the radiation of a circularly polarised wave. On the basis of the investigation of the Bi-DSS radiation mechanism, the Uni-DSS antenna with a triplate configuration is designed. Formation of a circularly polarised, unidirectional beam is experimentally realised. A 4 × 8 Uni-DSS array antenna with a simple feeding system is constructed, achieving an aperture efficiency of 60% over a frequency range of 11.6 GHz to 12.0 GHz.

Original languageEnglish
Pages (from-to)32-36
Number of pages5
JournalIEE Proceedings H: Microwaves, Antennas and Propagation
Volume138
Issue number1
Publication statusPublished - 1991 Feb
Externally publishedYes

Fingerprint

Spiral antennas
Slot antennas
Radiation
Antenna feeders
Antenna arrays
Antennas

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Dual-spiral slot antennas. / Hirose, Kazuhide; Nakano, H.

In: IEE Proceedings H: Microwaves, Antennas and Propagation, Vol. 138, No. 1, 02.1991, p. 32-36.

Research output: Contribution to journalArticle

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