© The Institution of Engineering and Technology
A compact filtering power divider is proposed with very wide stopband suppression in this letter. First, the dual-composite right- and left-handed (D-CRLH) resonator is employed, while one extended stopband can thus be achieved due to its inherently slow-wave response. Secondly, one out-of-phase feeding scheme is introduced to realise D-CRLH filtering power divider. By putting the input and output ports on the different sides of D-CRLH resonators, the mismatching can be realised for the harmonics below 10 GHz and wide stopband suppression is obtained accordingly. For experimental verification, a compact filtering power divider is designed, fabricated, and measured. Wide stopband suppression is observed until 5f 0 without using bandstop structures or complex coupling topology.
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