Dual-frequency circularly polarized antennas based on stacked monofilar square spirals

Author

Laheurte, Jean-Marc

Author_Institution

Lab. d´´Electron., Univ. de Nice-Sophia Antipolis, Valbonne, France

Volume

51

Issue

3

fYear

2003

fDate

3/1/2003 12:00:00 AM

Firstpage

488

Lastpage

492

Abstract

Two radiating spirals stacked on a foam substrate are used in the design of a circularly polarized antenna designed to respect new bandwidth constraints resulting from the emergence of multimedia services in satellite communications. Orthogonal circular polarizations are required for up and down links over large frequency bandwidths. In the single antenna, 4 to 5% axial ratio (AR) bandwidths are observed in a large beamwidth for both bands. This AR bandwidth increases appreciably (24 to 31%) when two antennas are combined in a sequentially rotated configuration.

Keywords

antenna arrays; antenna testing; electromagnetic wave polarisation; multifrequency antennas; satellite antennas; spiral antennas; substrates; AR bandwidth; axial ratio; bandwidth constraints; circularly polarized antennas; downlink; dual-frequency antennas; foam substrate; multimedia services; orthogonal circular polarizations; radiating spirals; satellite communications; sequentially rotated configuration; stacked monofilar square spirals; uplink; Bandwidth; Communication standards; Dual band; Frequency; Microstrip antennas; Patch antennas; Polarization; Satellite antennas; Satellite communication; Spirals;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2002.807422

Filename

1201325