Miniaturized rat-race coupler with bandpass response and good stopband rejection

W.-H. WangT.-M. ShenT.-Y. HuangRUEY-BEEI WU2018-09-102018-09-102009-06http://scholars.lib.ntu.edu.tw/handle/123456789/351851Miniaturized rat-race coupler with bandpass response and good stopband rejectionconference paper10.1109/MWSYM.2009.51657952-s2.0-77949937734