Enhanced radiation patterns of a wide-band strip-fed dielectric resonator antenna

Abstract EN

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.