Static source-mode tuning using a constellation of LPDA antennas in a reverberation chamber

摘要

An innovative source-mode tuning of electromagnetic fields in a reverberation chamber (RC) is presented. This is based on an antenna network placed in the RC. The fixed antennas are commuted sequentially rather than using a moving mechanical stirrer like a rotary paddle wheel. The objective is to get rid of any moving part and to decrease the testing time. A review of stirrer types is made. The efficiency of the new stirrer is assessed as a function of the field uniformity requirements of the IEC 61000-4-21 which states the 3 dB limit above 400 MHz. In our case we will work within the frequency band of mobile phone and GPS systems (800-2500 MHz). The three components of the E-field, the forward and reverse output powers and the binary code associated with the emitting antennas have been acquired for each of the tuner positions, at eight locations delimiting the testing volume, and at the number of frequencies as required in the standard. The first results show a promising method for tuning in an RC as the field uniformity complies with the standard deviation requirement of the IEC 61000-4-21. his electronic document is a "live" template. The various components of your paper [title, text, heads, etc.] are already defined on the style sheet, as illustrated by the portions given in this document.