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A general design procedure for three-strip interdigitated couplers with arbitrary coupling values is presented. These results are then applied, for various coupling values, to both stripline and microstrip media to check the physical realizability. The dimensions of the coupler can be substantially affected by allowing a small degree of impedance mismatching.
Microwave Theory and Techniques, IEEE Transactions on (Volume:32 , Issue: 10 )
Date of Publication: Oct 1984