Abstract
AbstractA novel concept of multisection tandem couplers composed of 2 quarter wavelength coupled‐line sections in between which a 270°‐long section is inserted has been proposed. The presented couplers feature relaxed coupling coefficients' requirements and a shorter overall electrical length with respect to the classic multisection tandem couplers, preserving simultaneously similar frequency characteristics to the ones obtainable in classic solutions. The proposed concept has been verified by the design and measurements of the developed tandem coupler operating at the center frequency 2 GHz with amplitude characteristics of a three‐section directional coupler.
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