Tsukasa Yoneyama Hirokazu Sawada Takashi Shimizu NRD-Guide Passive Components and Devices for Millimeter Wave Wireless Applications. 2170-2177 2007 90-C IEICE Transactions 12 http://dx.doi.org/10.1093/ietele/e90-c.12.2170 db/journals/ieicet/ieicet90c.html#YoneyamaSS07