Characterization of Rayleigh Fading Channel at 28 GHz Using Narrow and Wide Beamwidth Antennas in Reverberation Chamber

Abstract

Abstract— This paper present propagation measurements of Rayleigh fading channel at 28GHz band using frequency-modulated continuous wave (FMCW) radar as a channel sounder. An IF (intermediate frequency) signal of FMCW radar can be utilized in terms of both time and frequency domain signals due to a unique property of linear frequency modulation (LFM). The measurement is conducted in a reverberation chamber with two different received antennas; one has 72.29o and the other has 2.40o of 3 dB beamwidth on azimuth plane. We have investigated four different cases by changing the boundary conditions of reverberation chamber with/without flat microwave absorbers. With this measurement obtained scattered plots, normalized propagation delay profiles (PDPs), and envelope distribution of Rayleigh fading channel at about 28 GHz are discussed.