Title :
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
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;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2003.820972
