A monofilar Archimedean spiral slot antenna fed by a triplate transmission line

Author

Nakano, H. ; Nakayama, K. ; Hirose, K. ; Yamauchi, J.

Author_Institution

Coll. of Eng., Hosei Univ., Tokyo, Japan

fYear

1991

fDate

24-28 June 1991

Firstpage

1106

Abstract

It is found that a monofilar spiral slot has an optimum arm length for radiation of a CPW. The spiral slot radiates a wide unidirectional beam, having half-power beam widths on the order of 90 degrees in the two principal planes. The bandwidths for a 3-dB axial ratio criterion and a -14-dB return loss criterion are 7.4% and 4.9%, respectively. Using spiral slots, a 4*4 array antenna is designed through optimization of the array elements. The array shows an antenna gain on the order of 19 dB within a 3.7% bandwidth.<>

Keywords

antenna arrays; antenna feeders; antenna radiation patterns; electromagnetic wave polarisation; 19 dB; 3-dB axial ratio criterion; Archimedean spiral slot antenna; antenna feeder; antenna gain; arm length; array antenna; array elements; bandwidths; circularly polarised wave; half-power beam widths; monofilar spiral slot; principal planes; return loss; triplate transmission line; unidirectional beam; Antenna arrays; Antenna radiation patterns; Bandwidth; Coplanar waveguides; Feeds; Frequency; Slot antennas; Spirals; Stripline; Transmission line antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1991. AP-S. Digest

Conference_Location

London, Ontario, Canada

Print_ISBN

0-7803-0144-7

Type

conf

DOI

10.1109/APS.1991.175040

Filename

175040