• A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication

/pdf/a-multi-frequency-antenna-system-for-propagation-experiments-2deha3jw4u.pdf

A multi-frequency antenna system for propagation experiments with the Olympus satellite

The on-axis cross-polarisation of a reflector antenna illuminated by a feeding system with an asymmetric cross-polar radiation pattern is examined. A graph is presented from which the cross-polarisation discrimination (XPD) of the reflector antenna can be simply obtained.

Axial crosspolarization in reflector antennas due to asymmetric cross-polar feed patterns

Asymptotic Results for Partial Frequency Redistribution

The crosspolarisation efficiency of a reflector antenna is the ratio between the peak crosspolarisation from the complete antenna to that from the feed. The results of a parametric study into this factor for parabolic reflectors fed by a mathematical model of a common class of feeds are presented, and it is concluded that the efficiency is typically −4 to −6 dB.

D.J. Brain

Papers

Parametric study of the crosspolarisation efficiency of parabolic reflectors