Mi Zhou, Jin Shao, Bayaner Arigong, Han Ren, Rongguo Zhou, Hualiang Zhang. A tunable directional coupler with a wide tuning range of coupling ratios. In 2014 IEEE Radio and Wireless Symposium, RWS 2014, Newport Beach, CA, USA, January 19-23, 2014. pages 154-156, IEEE, 2014. [doi]
Abstract is missing.