A NOVEL DUAL-BAND Π-SHAPED BRANCH-LINE COUPLER WITH STEPPED-IMPEDANCE STUBS
2011 ◽
Vol 25
◽
pp. 11-20
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2019 ◽
Vol 66
(12)
◽
pp. 1987-1991
◽
2012 ◽
Vol 32
◽
pp. 43-52
◽
2018 ◽
Vol 66
(2)
◽
pp. 889-901
◽
2013 ◽
Vol 53
◽
pp. 399-415
◽
2011 ◽
Vol 53
(4)
◽
pp. 819-822
◽