Futoshi Kuroki Tsukasa Yoneyama Radiation Characteristics of NRD-Guide-Compatible Pyramidal Horn Antenna at 60 GHz. 1523-1525 2005 88-C IEICE Transactions 7 http://dx.doi.org/10.1093/ietele/e88-c.7.1523 db/journals/ieicet/ieicet88c.html#KurokiY05