Effective spectrum utilization in satellite communications by improving antenna radiation performance
Abstract
Effective spectrum utilization in satellite communications can be achieved by re-using the allocated frequency bands on the satellite-to-earth paths. This paper describes a technique of frequency re-use achieved by cross-polarization discrimination of the ground station antenna radiation performance. It is shown that a pair of reverse sense rotating cross-polarized or orthogonal linearly polarized propagating waves can be used to effect an increase of useful frequency bandwidth by a factor of two. The cross-polarized mode is found to be more advantageous because it is less affected by Faraday rotation and polarization angle axis changing and less critical to the phase shift error. In using the polarization technique the following antenna radiation performance characteristics should be considered: corrugated feed horn to launch a symmetric beam and two off-set paraboloidal reflectors arranged to cancel the beam central drift.
- Publication:
-
11th International Conference on Communications, Volume 1
- Pub Date:
- 1975
- Bibcode:
- 1975comm....1...10T
- Keywords:
-
- Antenna Radiation Patterns;
- Communication Satellites;
- Frequency Assignment;
- Microwave Transmission;
- Orthogonal Multiplexing Theory;
- Polarized Electromagnetic Radiation;
- Antenna Feeds;
- Channel Capacity;
- Parabolic Reflectors;
- Polarization (Waves);
- Reception Diversity;
- Satellite Transmission;
- Two Reflector Antennas;
- Communications and Radar