ENHANCED RADIATION PATTERNS OF A WIDE-BAND STRIP-FED DIELECTRIC RESONATOR ANTENNA

(Received: 2015-11-23, Revised: 2015-12-13 , Accepted: 2016-01-07)

Authors Asem S. Al-Zoubi,

Keywords #Wide-band antenna #Dielectric resonator antenna #Strip-fed antenna #Low cross-polarization.

Abstract A simple wide-band rectangular dielectric resonator antenna (DRA) is designed for the X-band and Ku- band applications. The DRA is excited by a vertical strip placed on the middle of the DRA’s wide side wall through a coaxial probe attached to a finite size ground plane. Good agreement between measured and simulated results is obtained. The measured 10 dB return loss bandwidth of the antenna is about 7.8 GHz (62%). The simulated gain of the antenna is 6.1 dBi at 12 GHz. The antenna excites undesired modes that perturb the radiation patterns and increase the cross-polarization level. The dielectric resonator is wrapped by a conducting strip to suppress some modes and improve the radiation characteristics of the antenna. Adding the strip reduces the cross-polarization level and improves the co- polarization radiation pattern.

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