Takashi Shimizu Tsukasa Yoneyama Wideband NRD Guide and Rectangular Waveguide H-Plane Transition at 60 GHz Band. 2263-2265 2007 90-C IEICE Transactions 12 http://dx.doi.org/10.1093/ietele/e90-c.12.2263 db/journals/ieicet/ieicet90c.html#ShimizuY07