Propagation losses due to foliage at various frequencies
Propagation losses due to foliage at various frequencies
- Author(s): J.E.J. Dalley ; M.S. Smith ; D.N. Adams
- DOI: 10.1049/cp:19990067
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- Author(s): J.E.J. Dalley ; M.S. Smith ; D.N. Adams Source: IEE National Conference on Antennas and Propagation, 1999 p. 267 – 270
- Conference: IEE National Conference on Antennas and Propagation
- DOI: 10.1049/cp:19990067
- ISBN: 0 85296 713 6
- Location: York, UK
- Conference date: 31 March-1 April 1999
- Format: PDF
Fixed access radio systems have been proposed or implemented at various frequencies with subscriber antennas located either inside a building or on the roof. One important factor in the link budget and hence coverage probability is the propagation loss due to foliage. This can either be the effect of large clusters of trees along the path or of isolated trees close to the subscriber. While high resolution clutter, vector or digital elevation databases could show the larger clusters of trees, the isolated ones are commonly not resolvable at reasonable cost. Therefore there is a requirement to allow for individual trees in the link budget for some areas. We present results on the effect of isolated trees on fixed access links at frequencies from 3 to 30 GHz where we assume that the subscriber antenna is directional and roof mounted.
Inspec keywords: loss measurement; directive antennas; radio access networks; microwave links; microwave propagation; electromagnetic wave polarisation
Subjects: Phase and gain measurement; Radio access systems; Radiowave propagation; Subscriber loops
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