Abstract
This paper deals with the incorporation of a high permittivity circular dielectric resonator (CDR) into a microstrip antenna which is investigated through simulation and measurement. Due to the circular shape of CDR, the microstrip antenna applied for investigation takes a circular patch with planar microstrip lines as a feeding line. The used CDR has the relative permittivity of 50 with the radius of 6.75mm and the height of 6.7mm. While, the microstrip antenna is deployed on a flame retardant (FR) glass-reinforced epoxy dielectric substrate with the relative permittivity of 4.2 and the thickness of 1.6mm. The CDR is incorporated into the microstrip antenna by placing it concentrically on the circular patch of microstrip antenna. From the experimental measurement, it shows that the resonant frequency of microstrip antenna with high permittivity CDR is lower about 1GHz than of the microstrip antenna without CDR from the frequency of 5.94GHz to the frequency of 5.04GHz. Although there is some slight different in other antenna parameters, however, both microstrip antennas show similar tendency each other in their performances.
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