Title :
Analysis of a hemispherical dielectric resonator antenna with an airgap
Author :
Wong, Kin-Lu ; Chen, Nan-Cheng ; Chen, Hong-Twu
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
A probe-fed hemispherical dielectric resonator antenna with an airgap of hemispherical shape between the dielectric and the ground plane is investigated theoretically by using a Green´s function formulation. Input impedance of the efficiently radiating mode of TE/sub 111/ is calculated and analyzed. It is found that, with the presence of the airgap, the antenna bandwidth, obtained from the 3-dB impedance bandwidth, can be considerably enhanced. This study provides a new design for bandwidth enhancement of the dielectric resonator antenna.<>
Keywords :
Green´s function methods; antenna theory; dielectric resonators; microwave antennas; Green´s function formulation; TE/sub 111/; airgap; antenna bandwidth; bandwidth enhancement; ground plane; hemispherical dielectric resonator antenna; impedance bandwidth; probe-fed; radiating mode; Antenna theory; Bandwidth; Dielectric resonator antennas; Geometry; Green´s function methods; Impedance; Microstrip; Permittivity; Probes; Shape;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
