Boon Kok TanJamie LeechGhassan YassinPhichet KittaraMike TaconSujint WangsuyaChristopher GroppiUniversity of OxfordMahidol UniversityArizona State University2018-06-112018-06-112012-01-01Journal of Infrared, Millimeter, and Terahertz Waves. Vol.33, No.1 (2012), 1-518666906186668922-s2.0-84856731950https://repository.li.mahidol.ac.th/handle/123456789/14186We present a design of a high performance horn operating at 700 GHz. The feed, which comprises three smooth-walled conical sections, is easy to machine and yet has comparable performance to a corrugated horn. The measured radiation patterns show high main beam circularity, low sidelobe level and good agreement with theoretical predictions. The cross-polar level is below -20 dB across a frequency bandwidth of 140 GHz. The new design allows the fabrication of high performance, large format feed arrays cheaply and rapidly. © 2011 Springer Science+Business Media, LLC.Mahidol UniversityEngineeringPhysics and AstronomyArticleSCOPUS10.1007/s10762-011-9845-y