Cross polarisation in front-fed reflector antennas possessing surface errors
Abstract
The effect of random profile errors on the boresight cross polar isolation of a paraboloid antenna is considered. The errors are described both statistically and by a worst case distribution. It is shown that the boresight cross polar isolation depends not only on the size and correlation of the errors but also on the off-axis cross polar performance of the feed. As many feeds are bandwidth limited as regards their cross polar performance, errors in the reflector cause the boresight cross polar performance of the total antenna to be bandwidth limited as well. The situation improves if the correlation distance of the errors is small.
- Publication:
-
Antennas and Propagation
- Pub Date:
- 1978
- Bibcode:
- 1978anpr.conf..418M
- Keywords:
-
- Antenna Feeds;
- Cross Polarization;
- Error Analysis;
- Parabolic Antennas;
- Parabolic Reflectors;
- Random Errors;
- Reflector Antennas;
- Boresights;
- Isolation;
- Performance Prediction;
- Statistical Correlation;
- Communications and Radar