Comparison of efficiency measurement methods for small antennas

The National Center for Scientific Research (CNRS) in France launched a number of specific actions (SA) in order to identify the most challenging issues to be investigated by the French research community. One of these specific actions is dedicated to antenna miniaturisation. The aim of this action is to provide a state of the art and new direction of studies in the following topics: antenna miniaturisation techniques and designs, evaluation of small antenna Q and fundamental limitation in miniaturisations, software issues: computing and benchmark, comparison of different small antennas efficiency measurement methods. This last part gathers three French university laboratories (IETR, IREENA, LEAT) and two French companies (CEA-LETI, SAGEM). Recently, three companies (TCL&ALCATEL Mobile Phones, Bluetest AB, IMST GmbH) and the Chalmers University of Technology have been interested to participate to the efficiency round robin measurements. This paper presents the work already done from January to December 2004.