Title :
Bandwidth Broadening of Dielectric Resonator Antenna by Merging Adjacent Bands
Author :
Chang, Tze-Hsuan ; Kiang, Jean-Fu
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A broadband dielectric resonator (DR) antenna is designed by merging its three resonant bands. An asymmetrical moat carved off the DR is designed to perturb the electric field distribution within the DR so that the Q factor of the DR is reduced, and the radiation pattern on the E-plane can be modified to increase the gain in the broadside direction. The mode mixing effect on the radiation patterns is also studied. A wide impedance bandwidth of 33%(4.89-6.86 GHz) is obtained with broadside radiation pattern of vertical polarization on the horizontal plane. This DR antenna can be used for WLAN 802.11a (5.15-5.85 GHz) applications.
Keywords :
antenna radiation patterns; dielectric resonator antennas; asymmetrical moat; bandwidth broadening; dielectric resonator antenna; electric field distribution; mode mixing; radiation pattern; resonant bands; wide impedance bandwidth; Antenna radiation patterns; Bandwidth; Broadband antennas; Dielectric resonator antennas; Impedance; Merging; Microstrip antennas; Polarization; Q factor; Resonance; Resonant frequency; Tellurium; Dielectric resonator; mode mixing; resonant mode;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2009.2029372
