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Analysis of interference-type measurer of directional coupler directivity

G. A. Lukyanchuk


A new method is suggested for construction of a measurer of directivity factor in directional couplers. The method is based on analysis of interference of the forward and backward wave in the secondary channel made as a closed ring. An equation relating the coupler directivity to the standing-wave ratio in the secondary channel is derived. An example of determination of couper’s directivity is included. The advantages of the proposed method are outlined.

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