The April 2019 issue of the free DKARS magazine features an article in English – Simple dual band dish feed for Es’hail-2 / QO-100 by Mike Willis G0MJW, Remco den Besten PA3FYM and Paul Marsh M0EYT.
Their article, on pages 18-23, describes an easy to build 2.4 and 10 GHz dish feed, using commonly available materials, for Es’hail-2 / QO-100 deployment. The feed consists of a LHCP patch antenna for 2.4 GHz and a waveguide feed for 10 GHz, to be placed in the focal point of commonly available and cheap offset satellite TV dishes with f/D’s of around 0.6
Download the full magazine PDF from https://dkars.us13.list-manage.com/track/click?u=2a0602da7add78cfc4cee370d&id=f8424212ae&e=ca64a74f86
Dutch Kingdom Amateur Radio Society (DKARS) http://www.dkars.nl/index.php?page=magazine_uk
Additional information on Es’hail-2 /QO-100 can be found at
https://amsat-uk.org/2019/02/10/qatar-oscar-100-web-receiver-now-live/