Title :
Bandwidth enhancement and frequency tuning of the dielectric resonator antenna using a parasitic slot in the ground plane
Author :
So, K.K. ; Leung, K.W.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Abstract :
The slot-fed hemispherical dielectric resonator antenna (DRA) with a parasitic rectangular slot in the ground plane is studied in this paper. It is found that the length and position of the parasitic slot can be used to widen the DRA bandwidth or to tune the DRA frequency. The exact DRA Green´s function is used in the formulation, and the unknown slot currents are solved using the method of moments. Measurements were carried out to verify the calculations, and good agreement between theory and experiment is obtained.
Keywords :
Green´s function methods; antenna feeds; broadband antennas; dielectric resonator antennas; method of moments; rectangular waveguides; slot antennas; DRA; Green´s function; antenna feed; frequency tuning; ground plane; hemispherical dielectric resonator antenna; method of moment; parasitic rectangular slot; wide-band antenna; Bandwidth; Broadband antennas; Dielectric constant; Dielectric losses; Dielectric resonator antennas; Frequency; Moment methods; Slot antennas; Tuning; Wideband; Dielectric resonator antenna (DRA); frequency tuning; parasitic slot; wide-band antenna;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2005.860002
