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Offset Cross-Slot-Coupled Dielectric Resonator Antenna for Circular Polarization

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3 Author(s)
Almpanis, G. ; Eidgenossische Tech. Hochschule, Zurich ; Fumeaux, C. ; Vahldieck, R.

A cross-slot-coupled cylindrical dielectric resonator antenna (DRA) is studied theoretically and experimentally. In previous papers, a cross-slot of unequal slot lengths was centered under the dielectric resonator (DR), resulting in circular polarized operation of the antenna. In the present study, the design is enhanced by setting the centers of the two slots at different positions and taking into consideration the partial independence of the slot modes from the DRA mode. Thus, circular polarization (CP) bandwidth of up to 4.7% is attained experimentally in the broadside direction. It is also shown that a largely asymmetrical structure results in a very high bandwidth, but with the tradeoff of distorted CP operation off-broadside

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:16 ,  Issue: 8 )

Date of Publication:

Aug. 2006

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