Title :
Active Broad X-Band Circular Patch Antenna
Author :
Andrenko, Andrey S. ; Ivanchenko, Igor V. ; Ivanchenko, Denis I. ; Karelin, Sergey Y. ; Korolev, Alexey M. ; Laz´ko, E.P. ; Popenko, Nina A.
Author_Institution :
YRP R&D Center, Fujitsu Labs. Ltd., Yokosuka
Abstract :
This letter presents the results of experimental study of omnidirectional circular patch antenna operating in the TM010 mode. Antenna geometrical parameters have been selected on the basis of theoretical calculations. It has been shown that the antenna of this kind with VSWR les 2 and bandwidth of 18% has a conical radiation pattern with maximum oriented 36deg to the zenith. The antenna has a side radiation level of -15 dB and a cross-component level of less than -25 dB. The experimental results are in good agreement with the theoretical calculations. Employment of the one-stage HEMT amplifier makes it possible to obtain the total gain of an active antenna of no less than 10 dB. This antenna can be successfully used for mobile systems, wireless indoor communications, as well as for array applications
Keywords :
HEMT circuits; active antennas; antenna radiation patterns; broadband antennas; microstrip antennas; microwave amplifiers; TM010 mode; active broad X-band circular patch antenna; antenna geometrical parameters; conical radiation pattern; omnidirectional circular patch antenna; one-stage HEMT amplifier; Antenna arrays; Antenna radiation patterns; Antenna theory; Bandwidth; Employment; HEMTs; Indoor communication; Mobile antennas; Patch antennas; Wireless communication; Circular patch antenna; HEMT amplifier; conical radiation pattern; indoor communications; near-field distribution;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2005.860200
