Answers are grounded in this paper and cite their sources.
The superior off-axis crosspolarisation performance of Cassegrain antennas, compared with that of front-fed antennas, is emphasised for conventional primary feeds. This statement is supported by theory and by measurements on both configurations.
No takes yet. Share an insight, caveat, or question.
Watson et al. (1973) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: