Title :
Mutual coupling reduction in a multi-mode multi-function dielectric resonator antenna
Author :
Zou, Longfang ; Fumeaux, Christophe
Author_Institution :
Sch. of Electr. & Electron. Eng., Univ. of Adelaide, Adelaide, SA, Australia
Abstract :
In a rectangular dielectric resonator, the mutual coupling between TE111 and Quasi-TM111 mode is in theory zero due to the orthogonal field distributions. In practice, some coupling is observed in a two ports dielectric resonator antenna (DRA) design based on those two modes. The mutual coupling can be explained by the asymmetric field distribution resulting from asymmetric feeding methods. Through analysis of the field distribution, two different methods are proposed to reduce mutual coupling to less than -15 dB. The first method considers an asymmetric resonator, whereas the second one symmetrizes the feeding. Designs with both methods are presented and their advantages and weaknesses are discussed.
Keywords :
antenna feeds; dielectric resonator antennas; electromagnetic fields; DRA design; Quasi-TM111 mode; TE111 mode; asymmetric feeding methods; asymmetric field distribution; asymmetric resonator; multimode multifunction dielectric resonator antenna; mutual coupling reduction; orthogonal held distributions; rectangular dielectric resonator; Antenna feeds; Bandwidth; Couplings; Dielectric resonator antennas; Dielectrics; Microstrip; Mutual coupling;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-0461-0
DOI :
10.1109/APS.2012.6348963