Title :
An omnidirectional small loop antenna based on first-negative-order resonance
Author :
Yu, Hong-Ze ; Chu, Qing-Xin ; Liu, Fang-Fang
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
A compact first-negative-order resonance-based small loop antenna is proposed which consists of two unit cells of composite right-left hand transmission line (CRLH TL). By folding one of the unit cells to the bottom layer, higher radiation efficiency and omnidirectional radiation property can be achieved. A prototype antenna is fabricated and measured. The size of the proposed antenna is only 10.45 mm × 7mm (or 0.062 λ0 × 0.042 λ0) at 1.78 GHz. The measured antenna bandwidth is 6.4 MHz and gain is 0.53 dBi.
Keywords :
UHF antennas; composite materials; loop antennas; metamaterial antennas; omnidirectional antennas; resonance; bandwidth 6.4 MHz; composite right-left hand transmission line; first negative order resonance; frequency 1.78 GHz; omnidirectional small loop antenna; size 10.45 mm; size 7 mm; Antenna measurements; Antenna radiation patterns; Dipole antennas; Gain; Loss measurement; Transmission line measurements; CRLH; first-negative-order resonance; loop antenna; metamaterial;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
