Polarization characteristics of patch antenna using in-plane and weakly biased ferrite substrate

Author

Fukusako, Takeshi ; Imahase, Akira ; Mita, Nagahisa

Author_Institution

Dept. of Electr. & Comput. Eng., Kumamoto Univ., Japan

Volume

52

Issue

1

fYear

2004

Firstpage

325

Lastpage

327

Abstract

A square patch antenna using an in-plane biased yttrium iron garnet (YIG) polycrystalline substrate is presented. The patch antenna is fed through a cross-slot with slots of equal or unequal length to control the polarization. The experimental results reveal that the rotation direction of the elliptical polarization was switched between right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP) controlling the axial ratio continuously without switching devices. The antenna gain was also investigated with respect to this polarization switching and the magnetic bias.

Keywords

antenna feeds; electromagnetic wave polarisation; ferrite devices; microstrip antennas; substrates; yttrium compounds; cross-slot polarization control; ferrite substrate; in-plane biased YIG; left-hand circular polarization; polarization switching; right-hand circular polarization; square patch antenna; switching devices; yttrium iron garnet polycrystalline substrate; Antenna radiation patterns; Ferrites; Magnetic devices; Magnetic resonance; Magnetic switching; Patch antennas; Polarization; Saturation magnetization; Switches; Yttrium;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2003.820972

Filename

1268331