erberation chambers. The reverberation chamber group at FOI in Sweden has recently conducted important studies related to stirrer efficiencies and accuracy [38,39]. Over the past years, the reverberation chamber group at NIST has started to do studies of wireless measurements in reverberation chambers as well [40]. Other groups are also taking up research on wireless measurements in reverberation chambers, such as the group at the University of Naples [41]. One PhD student from the group in Naples has recently spent 3 months at Chalmers doing research together with Kildal's group. The interest in the reverberation chamber measurement technology has spread worldwide. Several leading world mobile phone and wireless systems companies are today using Bluetest reverberation chambers for measuring antennas, radiated power, or receiver sensitivity when developing wireless terminals. The main interest of most university groups using reverberation chambers is that the chamber can be used to measure diversity gain and capacity of multi- port antennas. We have coauthored one journal article [42] and several conference papers about such diversity antenna characterization. CTIA-The Wireless Organization-an international nonprofit member- ship organization founded in 1984 that represents all sectors of wireless commu- nications (cellular, personal communication services, and enhanced specialized mobile radio)-has started standardization of reverberation chambers for wireless © 2009 by Taylor & Francis Group, LLC Long Term Evolution: 3GPP LTE Radio and Cellular Technology measurements and has invited Bluetest AB to participate as a guest member. The main objective has been to develop initially good calibration procedures, and Bluetest has received an initial acceptance for the approach that it is using, which is the best that can be done at the moment. NIST is also in the CTIA Reverberation Chamber Subgroup and supports the Bluetest approach, which is natural because both research groups are based on the same fundamental papers