Title :
Wideband Dielectric Resonator Antenna With a Tunnel
Author :
Chang, Tze-Hsuan ; Huang, Yu-Ching ; Su, Wei-Fang ; Kiang, Jean-Fu
Author_Institution :
Dept. of Electr. Eng. & the Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei
fDate :
6/30/1905 12:00:00 AM
Abstract :
A wideband rectangular dielectric resonator (DR) with a horizontal tunnel is proposed. The bandwidth of the TEy 111 mode is increased by using the tunnel to reduce the Q-factor of the DR. As the tunnel height is increased, the electric field distribution of the TEy 112 mode is significantly modified such that its electric field distribution near the top surface of DR is similar to that of the TEy 111 mode, rendering a broadside radiation pattern. The band of the modified TEy 112 mode is merged with that of the TEy 111 mode to achieve a wide bandwidth of 20% (4.765.86 GHz) with broadside radiation pattern of vertical polarization on the xy-plane. The proposed DR antenna can be used in WLAN 802.11a applications.
Keywords :
Q-factor; antenna radiation patterns; broadband antennas; dielectric resonator antennas; electromagnetic wave polarisation; tunnelling; Q-factor; TE mode; WLAN 802.11a application; broadside radiation pattern; electric field distribution; horizontal tunnel; vertical polarization; wideband rectangular dielectric resonator antenna; Dielectric resonator; Dielectric resonator (DR); resonant mode;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2008.928477
