![SPIE Proceedings [SPIE 13 Intl Conf on Infrared and Millimeter Waves - Honolulu, HI (Saturday 5 December 1987)] 13th Intl Conf on Infrared and Millimeter Waves - <title>Printed-Circuit Rat-Race-Type Directional Couplers For Larger Power-Split Ratio</title>]()
SPIE Proceedings [SPIE 13 Intl Conf on Infrared and Millimeter Waves - Honolulu, HI (Saturday 5 December 1987)] 13th Intl Conf on Infrared and Millimeter Waves - <title>Printed-Circuit Rat-Race-Type Directional Couplers For Larger Power-Split Ratio</title>Ohta, Isao; Hagino, Ichiro; Kaneko, Takenori; Temkin, Richard J. · 1988