Calculation of coherent attenuation at milimetre-wave frequencies
Abstract
A frequency scaling procedure is presented which may be used throughout the millimeter-wave band to calculate coherent attenuation due to rain for any drop-size distribution. A formula for the imaginary part of the scattering amplitude at all millimeter-wave frequencies is presented. The appropriate attenuation can then be obtained by integrating the product of the drop-size distribution and the scattering amplitude. Also considered is a method of scaling amplitudes for spherical drops to obtain amplitudes for horizontal polarization incident on spheroidal drops. Advantages of the proposed approach are that the type of rain can be taken into account when calculating attenuation, and that values for any frequency are readily obtainable without the need to use sophisticated computing resources.
- Publication:
-
Electronics Letters
- Pub Date:
- September 1984
- DOI:
- 10.1049/el:19840566
- Bibcode:
- 1984ElL....20..833H
- Keywords:
-
- Atmospheric Attenuation;
- Microwave Attenuation;
- Millimeter Waves;
- Particle Size Distribution;
- Raindrops;
- Coherent Radiation;
- Drop Size;
- Microwave Scattering;
- Scattering Amplitude;
- Spheroids;
- Communications and Radar