Extended range ultra-wideband millimeter-wave channel sounder with over-the-air calibration

In this paper, an ultra-wideband millimeter-wave channel sounder is introduced. The channel sounder, consisting of a Vector Network Analyzer and 1 km of fiber, can perform high resolution channel sounding over long distances. A wired response calibration is compared to an over-the-air calibration. It is shown that the over-the-air calibration of the channel sounder increases the dynamic range in the power-delay-profile by 14 dB compared to the wired response calibration.