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Hybrid Branchline Couplers - A Useful New Class of Directional Couplers

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1 Author(s)

The hybrid branchline coupler consists of two transmission lines connected alternately by /spl lambda//4 shunt and series branches. The analysis of this structure leads to a class of directional couplers of which the parallel transmission-line and the de Ronde strip-slot types may be regarded as special cases. From the precise design data thus available, a number of 3-dB strip-slot couplers have been built in C band and X band with a performance close to the predicted one.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:22 ,  Issue: 10 )