The effects of antenna gains and polarization on multipath delay spread and path loss at 918 mhz on cross-campus radio links

Theodore S. Rappaport, Joseph C. Liberti, Kenneth L. Blackard, Bruce Tuch

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents results of delay spread and path loss measurements across a large college campus, and illustrates how antenna gain and polarization should be selected for line-of-sight microwave links between buildings. Two line-of-sight links were used with three different types of antennas to determine best polarizations and pointing angles. Measurements show multipath is most severe when antennas of different polarizations are used on each end of the link. Minimum delay spreads are encountered when antennas of the same polarization are used and pointed directly towards each other. As long as polarizations are matched on each side of the link, polarization does not have significant impact on delay spread or path loss. A somewhat surprising result, however, is that circularlypolarized helical antennas offer multipath reduction over a wide range of pointing angles. This suggests that on point-to-point cross-campus links where a single antenna is desired to serve a broad coverage area, circular polarization could be used in lieu of channel equalization to improve bit-error-rates in high speed data networks.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE Vehicular Technology Society, 42nd VTS Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages550-553
Number of pages4
ISBN (Electronic)0780306732
DOIs
StatePublished - 1992
Event42nd IEEE Vehicular Technology Society Conference: Frontiers of Technology, VTS 1992 - Denver, United States
Duration: May 10 1992May 13 1992

Publication series

NameIEEE Vehicular Technology Conference
Volume1992-May
ISSN (Print)1550-2252

Conference

Conference42nd IEEE Vehicular Technology Society Conference: Frontiers of Technology, VTS 1992
CountryUnited States
CityDenver
Period5/10/925/13/92

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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