Title :
Novel zeroth-order resonant antenna with improved radiation efficiency
Author :
Gong, Jian-Qiang ; Jiang, Jun-Bo ; Liang, Chang-Hong
Author_Institution :
Nat. Key Lab. of Antennas & Microwave Technol., Xidian Univ., Xi´´an, China
Abstract :
A compact zeroth-order resonant antenna (ZORA) with improved radiation efficiency is proposed by employing a novel slot-loaded (SL) simplified composite right-/left-handed (SCRLH) transmission line (TL) structure. The operating frequency of the ZORA is independent of its physical size, but is only determined by its constituent unit-cell´s shunt resonant frequency. Due to the slots etched in the ground, the zeroth-order resonator´s quality factor can be reduced, so that the miniaturized ZORA can produce substantial improvement on the radiation efficiency. Meanwhile, a monopole-like radiation pattern with maximum gain of 2.3 dB is generated with only two-unit-cell configuration. The full-wave simulation results testify the theoretical analyses.
Keywords :
Q-factor; antenna radiation patterns; monopole antennas; transmission lines; gain 2.3 dB; monopole-like radiation pattern; quality factor; radiation efficiency; slot-loaded simplified composite right-/left-handed transmission line; unit-cell´s shunt resonant frequency; zeroth-order resonant antenna; Antenna radiation patterns; Gain; Impedance; Integrated circuit modeling; Microwave antennas; Q factor; Resonant frequency; Slot-loaded; improved radiation efficiency; simplified composite right-/left-handed; zeroth-order resonant antenna;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
