Title :
Wide-band microwave propagation parameters using circular and linear polarized antennas for indoor wireless channels
Author :
Rappaport, Theodore S. ; Hawbaker, Dwayne A.
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
fDate :
2/1/1992 12:00:00 AM
Abstract :
Results of experiments using a variety of antennas inside several buildings are presented. Path loss models for the 1.3 GHz and 4.0 GHz bands that show little difference in indoor path loss throughout the low-microwave region are discussed. Results show that line-of-sight (LOS) channels offer significantly more cross-polarization discrimination than obstructed channels. A profound result is that directional circularly polarized (CP) antennas always reduce RMS delay spread when compared to omnidirectional and directional linearly polarized (LP) antennas in LOS. The variation of RMS delay spread as a mobile moves over several wavelengths is also greatly reduced when CP antennas are used
Keywords :
directive antennas; mobile antennas; mobile radio systems; radiowave propagation; telecommunication channels; 1.3 GHz; 4 GHz; RMS delay spread; SHF; UHF; circularly polarised antennas; cross-polarization discrimination; directional antennas; indoor mobile radio; indoor path loss; line of sight channels; linear polarized antennas; obstructed channels; path loss models; wideband microwave propagation; Antenna measurements; Antennas and propagation; Broadband antennas; Delay; Log periodic antennas; Loss measurement; Microwave antennas; Microwave propagation; Polarization; Time measurement;
Journal_Title :
Communications, IEEE Transactions on
