Title :
Efficiency comparison method
Author :
Mehta, Bhavyang Ramesh ; Lee, Choon Sae ; Ezzat, Mohamed ; Zhu, Yong ; Chang, George
Author_Institution :
Dept. of Electr. Eng., Southern Methodist Univ., Dallas, TX, USA
Abstract :
A method to evaluate radiation efficiency is proposed. Normally the antenna gain is measured by comparing the gain of an antenna under test (AUT) with that of a standard gain horn (SGH). Once the gain is available, the antenna efficiency is computed assuming the directivity is available. However when there is scattering from nearby objects, the gain calibration may not be accurate and the data will give an erroneous radiation efficiency in the process. In the proposed method, the antenna efficiency is measured by comparing the efficiencies of the AUT and SGH, which reduces the uncertainties substantially.
Keywords :
antenna radiation patterns; calibration; electromagnetic wave scattering; horn antennas; AUT; SGH; antenna efficiency comparison method; antenna gain measurement; antenna under test; erroneous radiation efficiency; gain calibration; standard gain horn; Antenna measurements; Dipole antennas; Gain; Gain measurement; Power measurement; Scattering;
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.2012.6348066
