A fading reduction method for maritime satellite communications
Abstract
A simple and effective method for reducing fading which involves adding a few devices to a low-gain compact antenna which will be used in the near future is proposed. The reduction effect has been confirmed on the seashore by receiving radio waves from Marisat. The principle of fading reduction is analyzed, including the electrical characteristics of the hybrid combiner, the reflecting characteristics of circularly polarized waves reflected by the sea, and the fading reduction method and antenna. The experimental results show that the fading is reduced by eliminating a coherent component of a reflected wave. The experiments were performed at an elevation angle of 10 degrees, but more reduction can be obtained at an angle of 5 degrees. The discussed antenna will be able to receive signals without fading in spite of a 3 dB attenuation caused by using a power combiner.
- Publication:
-
IEEE Transactions on Antennas and Propagation
- Pub Date:
- January 1983
- DOI:
- 10.1109/TAP.1983.1142996
- Bibcode:
- 1983ITAP...31..184O
- Keywords:
-
- Antenna Design;
- Maritime Satellites;
- Radio Communication;
- Signal Fading;
- Wave Amplification;
- Circular Polarization;
- Elevation Angle;
- Marisat Satellites;
- Signal Reception;
- Signal Reflection;
- Communications and Radar