Title :
A high-gain dual-band ESPAR antenna with simple on/off controlling
Author :
Huang, W.J. ; Sun, B.H. ; Wang, Y. ; Zhang, F.F. ; He, K.
Author_Institution :
Sch. of Electron. Eng., Xidian Univ., Xi´´an, China
fDate :
Nov. 29 2010-Dec. 2 2010
Abstract :
A new type of dual-band ESPAR (Electronically Steerable Parasitic Array Radiator) array antenna is presented. The antenna consists of one feeding radiating element and two-layer parasitic radiating elements. The parasitic radiating element of each layer is composed of 6 parasitic monopoles and placed in the near field of the active radiator. Replacing the reactance-load, the on/off controlling is used, which is easy fulfilled and low cost. The antenna realizes the dual-band performance by using a metal cylinder with a large radius as active radiator and an impedance matching circuit. The designed two-layer parasitic radiating elements make the antenna gain enhanced. A prototype is made and tested, and the result shows that the antenna has a horizontal directivity of 6-7 dBi and VSWR of 3:1 or better at 1.48 GHz and 1.82 GHz.
Keywords :
UHF antennas; antenna feeds; antenna radiation patterns; impedance matching; monopole antenna arrays; multifrequency antennas; active radiator; antenna gain enhancement; electronically-steerable parasitic array radiator; feeding radiating element; frequency 1.48 GHz; frequency 1.82 GHz; high-gain dual-band ESPAR antenna array; horizontal directivity; impedance matching circuit; metal cylinder; on-off controlling; parasitic monopoles; two-layer parasitic radiating elements;
Conference_Titel :
Antennas Propagation and EM Theory (ISAPE), 2010 9th International Symposium on
Conference_Location :
Guangzhou
Print_ISBN :
978-1-4244-6906-2
DOI :
10.1109/ISAPE.2010.5696463
