An Electronically Tunable High-Power Impedance Tuner With Integrated Closed-Loop Control

In this letter, a novel electronically tunable, high-power and highly linear impedance tuner with integrated closed-loop control is experimentally demonstrated. The structure of the proposed tuner is based on two individually controlled substrate-integrated cavities, implemented as evanescent-mode magnetically coupled resonators. A prototype tuner at 3.3 GHz is designed, fabricated, and successful...