Impedance-Transforming Lumped-Element Co-directional Couplers and Their Circuit Structure

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説明

In this paper, lumped-element realization of an impedance-transforming two-branch co-directional coupler is discussed. A lumped-element coupler derived from a branch-line coupler with one-quarter and three-quarters wavelength transmission-lines can be classified into five categories. Simple lumped-element couplers are newly presented.

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