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Complex Compensation of Coupled Line Structures in Inhomogeneous Media
This paper presents a novel method for the
compensation of unequal phase velocities of coupled line
structures in inhomogeneous media. By means of a rigorous
scattering parameter analysis, ideal values for compensating
impedances, connected in series to one or several ports
of the coupler, are found. It is shown that, by properly
choosing the values of the impedances’ real and imaginary
part, perfect isolation can theoretically be obtaind at any
frequency. Simulation and measurements are compared to
previously published results, demonstrating the advantage of
this novel approach.
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