Sub-Band Time Reversal Efficiency Measurement: An Enhanced Method for Efficiency Characterization of UWB Antennas

Antenna efficiency is a critical parameter if one wishes to characterize the performance of an antenna. It is a measure of the radiation quality of an antenna and helps to quantify the transmission quality therefore it is useful to possess the means to verify this quantity. Classical approaches to measure the antenna efficiency, whether in anechoic or reverberation chamber, are quite time consuming. This communication presents a novel method for the measurement of the antenna efficiency in a reverberation chamber. The proposed method uses time reversal coupled with a filtering scheme which guarantees an equal contribution of all (low and high) frequencies in the transmitting signal. The results are compared with other methods of efficiency characterization. The results show little variation with different positions of the stirrer and therefore can be used for making precise measurements of the antenna efficiency in a short duration.

[2]  A. Khaleghi,et al.  Time-Domain Measurement of Antenna Efficiency in Reverberation Chamber , 2009, IEEE Transactions on Antennas and Propagation.

[3]  Philippe Besnier,et al.  Time Reversal UWB Communication: Experimental Study for High Data Rates in Dense Multipath Propagation Channels , 2009, ICC 2009.

[4]  P. Kildal,et al.  Study of distributions of modes and plane waves in reverberation chambers for the characterization of antennas in a multipath environment , 2001 .

[5]  Gwenn Le Fur.  Contribution aux méthodes de mesure de rendement d'antenne. , 2009 .

[6]  Minh-Chau Huynh,et al.  Wideband Compact Antennas for Wireless Communication Applications , 2004 .

[7]  D. Pozar,et al.  Comparison of three methods for the measurement of printed antenna efficiency , 1988 .

[8]  Maurizio Migliaccio,et al.  Reverberating chambers as sources of stochastic electromagnetic fields , 1996 .

[9]  Philippe Besnier,et al.  Efficiency Measurement of UWB Antennas Using Time Reversal in Reverberation Chamber. , 2008 .

[10]  A. Sharaiha,et al.  Time Reversal Efficiency Measurement in Reverberation Chamber , 2012, IEEE Transactions on Antennas and Propagation.

[11]  Per-Simon Kildal,et al.  Correlation and capacity of MIMO systems and mutual coupling, radiation efficiency, and diversity gain of their antennas: simulations and measurements in a reverberation chamber , 2004, IEEE Communications Magazine.

[12]  H.G. Schantz,et al.  Radiation efficiency of UWB antennas , 2002, 2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580).

[13]  G. Lerosey,et al.  Experimental validation of time reversal ultra wide-band communication system for high data rates , 2010 .

[14]  H. A. Wheeler.  The Radiansphere around a Small Antenna , 1959, Proceedings of the IRE.

[15]  Ali Khaleghi.  Measurement and Analysis of Ultra-Wideband Time Reversal for Indoor Propagation Channels , 2010, Wirel. Pers. Commun..

[16]  Ghaïs El Zein,et al.  Demonstration of Time-Reversal in Indoor Ultra-Wideband Communication: Time Domain Measurement , 2007, 2007 4th International Symposium on Wireless Communication Systems.

[17]  Constantine A. Balanis,et al.  Antenna Theory: Analysis and Design , 1982 .