Frequency dependence of microwave depolarization versus rain attenuation
Abstract
Calculations using oblate spheroidal raindrops, as well as measured data, demonstrated that rain-induced cross polarization amplitude is inversely proportional to frequency from 10 to 30 GHz. Except for extremely low rain rates (equal to or less than 2.5 mm/h), the above frequency dependence has now been found to be true also for the more realistic (Pruppacher and Pitter shape) raindrops. A possible explanation for the misleading claim of inverse three-halves power frequency dependence was also explored. This clarification is presented to revise the frequency dependence of the International Radio Consultative Committee (CCIR) formula on rain-induced cross polarization versus attenuation.
- Publication:
-
IEEE Transactions on Antennas and Propagation
- Pub Date:
- September 1984
- DOI:
- 10.1109/TAP.1984.1143454
- Bibcode:
- 1984ITAP...32..994C
- Keywords:
-
- Atmospheric Attenuation;
- Cross Polarization;
- Depolarization;
- Frequency Response;
- Microwave Attenuation;
- Raindrops;
- Attenuation Coefficients;
- Microwave Scattering;
- Oblate Spheroids;
- Communications and Radar