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This paper presents a novel approach for providing SIW tunable resonators by means of placing an additional metalized via-hole on the waveguide cavity. The via-hole contains an open-loop slot on the top metallic wall. The dimensions, position and orientation of the open-loop slot defines the tuning range. Fabrication of some designs reveal good agreement between simulation and measurements. Additionally a preliminary prototype which sets the open-loop slot orientation manually is also presented, achieving the expected continuous tuning range of at least 8%.

Peer Reviewed