DocumentCode :
1549677
Title :
Rain-induced crosspolarisation on line-of-sight systems at 38 GHz
Author :
Tan, J. ; Thurai, M.
Author_Institution :
Radio Commun. Res. Unit, Rutherford Appleton Lab., Chilton, UK
Volume :
144
Issue :
1
fYear :
1997
fDate :
2/1/1997 12:00:00 AM
Firstpage :
20
Lastpage :
26
Abstract :
Factors affecting rain-induced depolarisation at 38 GHz have been investigated. The effect of raindrop canting on the crosspolar signal levels has been examined together with other, more minor, factors such as water temperature and drop shape model. The intervening medium between the two terminals is assumed to have constant rainfall rate and the crosspolar effects are evaluated for various link separations and for various rain intensities. Additionally, data obtained from the Chilbolton radar are used and the depolarisation effects due to typical precipitation events are assessed. Results indicate that, for a standard 38 GHz PCN (personal communication network) system, the use of linear, orthogonal polarisations is not likely to present operational problems. Compared with the copolar fading of the wanted signal and the depolarisation introduced by antennas typically used by the operators, the effects of rain-induced crosspolarisation are shown to be almost negligible
Keywords :
Fredholm integral equations; electromagnetic wave polarisation; fading; millimetre wave propagation; personal communication networks; radar applications; radio links; rain; tropospheric electromagnetic wave propagation; 38 GHz; Chilbolton radar; EHF; Fredholm integral equation method; PCN system; constant rainfall rate; copolar fading; crosspolar effects; crosspolar signal levels; depolarisation effects; drop shape model; line-of-sight systems; linear polarisation; link separations; orthogonal polarisation; personal communication network; precipitation events; rain intensities; rain-induced crosspolarisation; raindrop canting; water temperature;
fLanguage :
English
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings
Publisher :
iet
ISSN :
1350-2417
Type :
jour
DOI :
10.1049/ip-map:19970962
Filename :
587061
Link To Document :
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