Accuracy of Antenna Input Reflection Coefficient and Mismatch Factor Measured in Reverberation Chamber

Inhalt:
It has previously been shown that radiation efficiency and input reflection coefficient S11 fs of small antennas in free space can be obtained from measurements in reverberation chamber. The S11 fs is obtained by so-called complex stirring of the S11 measured when the antenna is in the chamber. In the present paper it is shown that the accuracy of S11 fs can be very good even for larger directive antennas at high frequency provided additional complex frequency stirring is applied. The corresponding deterioration loss in frequency resolution is small at high frequency, in the relative sense. The presented S11 fs results match results measured in anechoic chamber down to -40 dB.