Miniaturised dual-band rat-race coupler based on double-sided parallel stripline

Miniaturised dual-band rat-race coupler based on double-sided parallel stripline

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A dual-band rat-race coupler is proposed with double-sided parallel stripline topology, phase inverter and E-shaped impedance transformers. The developed component shows a miniaturised size and a flexible frequency ratio of two operating bands. For validation, a prototype operating at 0.9/1.8 GHz has been designed and measured with a very compact configuration and good performance has been obtained.


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      • Y.C. Chiou , J.T. Kuo , C.H. Chan . New miniaturized dual-band rat-race coupler with microwave C-sections. IEEE MTT-S Int. Microw. Symp. Dig. , 701 - 704
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      • T.Q. Wang , K. Wu . Size-reduction and band-broadening design technique of uniplanar hybrid ring coupler using phase inverter for M(H)MIC's. IEEE Trans. Microw. Theory Tech. , 2 , 1806 - 1817

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