Title :
Dual function of a dielectric resonator: A high-Q resonator and a low-Q radiator
Author :
Hady, Laila K. ; Kajfez, Darko ; Kishk, Ahmed A.
Author_Institution :
Department of Electrical Engineering, The University of Mississippi, 38677, USA
Abstract :
A new concept of dual mode operation for oscillation and radiation characteristics using single dielectric resonator enclosed by modified rectangular cavity has been developed in this paper. High unloaded quality factor of 2700 at 2.54 GHz and omni-directional radiation patterns with radiation bandwidth of 5.13% around 3.31 GHz were achieved simultaneously. The high-Q mode is coupled to a microstrip line and the low-Q mode is coupled to a coaxial probe with capacitive plate. Measurements of the scattering parameters and of the radiating patterns were carried out to verify the simulation results.
Keywords :
Q-factor; antenna radiation patterns; dielectric resonators; microstrip lines; dielectric resonator; dual mode operation; frequency 2.54 GHz; frequency 3.31 GHz; high-Q resonator; low-Q radiator; microstrip line; omni-directional radiation patterns; quality factor; Antenna measurements; Coaxial components; Dielectric measurements; Dielectric resonator antennas; Dielectric substrates; Filters; Frequency; Oscillators; Q factor; Strips; Dual mode operation; active antennas; dielectric resonator antenna; dielectric resonator oscillator;
Conference_Titel :
Microwave Symposium Digest, 2008 IEEE MTT-S International
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-1780-3
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2008.4633006
