Impedance-transforming transdirectional coupled-line directional couplers with maximum achievable transformation ratio - replication data

The dataset contains results obtained during simulations and measurements of a novel concept of an impedance-transforming transdirectional directional couplers with maximum achievable transformation ratio. It is shown that such couplers can be designed as an appropriate connection of two uncoupled two-wire transmission lines, having electrical lengths equal 90° and 270°. The major advantage of the proposed circuits is their reciprocity which allows for application in multiport amplifiers. The concept has been verified by the design and measurement of a 3-dB transdirectional coupler operating at a center frequency of 1 GHz that allows for achieving impedance transformation ratio R=2 proving the correctness of the presented analysis.