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A Flow Graph Analysis of 3 - and 4-Port Junction Circulators

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1 Author(s)

A simple theoretical model of a Iossless nonideal junction circulator is described. The model consists of a matched lossless n-port junction with a lossless two-port connected to each arm. The basic thought behind it is to separate the reflecting properties of the circulator from the other ones. For the case n=3, unsymmetrical as well as symmetrical junctions are treated. For a symmetrical three-port, the justification of the model has also been experimentally verified. In the case n=4, a symmetrical junction is treated. Flow graphs are used for visualizing the scattering matrices of combined networks and for calculating the coefficients of them.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:14 ,  Issue: 5 )