Statistical Models of Antenna Efficiency Measured Using Non-Reference Antenna Methods with Hybrid Stirring

Owning to the particular properties of the reverberation chamber (RC), it has been widely applied to antenna efficiency measurements. The non-reference antenna methods can determine antenna efficiency without the need of a reference antenna. Therefore, they are more convenient to use than the conventional RC-based method. Very recently, statistical models of the one- and three-antenna methods were derived. However, frequency stirring (i.e., an important stirring mechanism) was not considered in the statistical models. In this work, the improved statistical models with combined mechanical and frequency stirring techniques are proposed. RC measurements are performed to verify the improved models, corresponding results are in accordance with expectation. The improved statistical models allow further analyses of the measured antenna efficiencies using the one- and three-antenna methods when frequency stirring is adopted.