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Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.36 [2007] >
IJRSP Vol.36(5) [October 2007] >
| Title: | Estimation of cross-polarization due to rain over some stations in India |
| Authors: | Jaiswal, R Sen
Geetha, P
Uma, S |
| Keywords: | Rainfall rate
Attenuation
Cross-polarization
Rain height |
| Issue Date: | Oct-2007 |
| Publisher: | CSIR |
| Abstract: | In this paper an attempt has been made to compute cross-polarization of millimeter waves in the 30-35 GHz frequency range due to rain. Laws and Parson’s drop size distributions for oblate spheroid drops at 20ºC ITU-R (2002) model has been used to predict cross-polarization discrimination (XPD) for circular polarization. The study includes a number of earth stations in India, namely, Ahmedabad, Calcutta, Delhi, Gangtok and Jodhpur. Variations of co-polar attenuation with XPD have been shown. Cumulative time distribution of XPD has also been presented. The study reveals that cross-polarization depends on frequency, co-polar attenuation and rainfall rate. Comparison with measurement does not show good agreement although the two show the same trend. Extensive work on cross-polarization is required in the millimeter wave frequency range over a large number of earth stations in India using different drop size distributions and different polarizations. |
| Page(s): | 379-382 |
| ISSN: | 0367-8393 |
| Source: | IJRSP Vol.36(5) [October 2007]
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