Title :
A simple EBG structure for dual-band circularly polarized antennas with high directivity
Author :
Zeb, Basit Ali ; Esselle, Karu P.
Author_Institution :
Dept. of Electron. Eng., Macquarie Univ., Sydney, NSW, Australia
Abstract :
A simple electromagnetic band gap (EBG) structure is used as a superstrate to enhance the directivity of circularly-polarized (CP) corner-truncated microstrip patch antennas in two frequency bands. The EBG structure is composed of two simple unprinted identical dielectric slabs and its symmetry is exploited to transform the less directive CP beam of the patch to a highly directive CP beam. Computed results confirm the concept of this simple and novel dual-band circularly polarized EBG resonator antenna and its ability to generate CP with good axial ratio in two discrete frequency bands.
Keywords :
directive antennas; electromagnetic wave polarisation; microstrip antennas; multifrequency antennas; photonic band gap; resonators; CP corner-truncated microstrip patch antenna; EBG structure; axial ratio; directive CP beam; directivity enhancement; discrete frequency bands; dual-band circularly-polarized resonator antennas; electromagnetic band gap structure; superstrate; unprinted dielectric slabs; Dielectric resonator antennas; Directive antennas; Feeds; Metamaterials; Periodic structures; Resonant frequency;
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.2012.6348941
