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

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3 Author(s)
Fukusako, T. ; Dept. of Electr. & Comput. Eng., Kumamoto Univ., Japan ; Imahase, A. ; Mita, N.

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.

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Antennas and Propagation, IEEE Transactions on  (Volume:52 ,  Issue: 1 )