Using Superformula to Miniaturize CPW Rat Race Coupler
Keywords:
Coplanar waveguide, rat-race coupler, superformulaAbstract
This paper proposes a new CPW rat race coupler whose shape has been meandered using the superformula for size reduction. The coupler operates at a center frequency of 1.8 GHz. The size reduction in the proposed design is about 74% as compared to conventional ring rat race coupler. The bandwidth of the proposed coupler defined by |S11| < -15 dB is about 31.6%.
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References
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