Hiroyuki Deguchi Mikio Tsuji Hiroaki Watanabe Low-Sidelobe Multimode Horn Design for Circular Coverage Based on Quadratic Programming Approach. 3-8 2008 91-C IEICE Transactions 1 http://dx.doi.org/10.1093/ietele/e91-c.1.3 db/journals/ieicet/ieicet91c.html#DeguchiTW08