Y.-L. LinT.-Y. HuangT.-M. ShenC.-C. ChenRUEY-BEEI WU2018-09-102018-09-102011-12http://scholars.lib.ntu.edu.tw/handle/123456789/366291Design of compact triple-band branch-line coupler with three arbitrary operating frequenciesconference paper2-s2.0-84860504819