This paper presents a frequency reconfigurable evanescent-mode cavity-backed slot antenna (ECBSA) with wide tuning range, high-power handling capability, and simplified manufacturing. The mechanism consists of external long-range linear actuators contactless tuner disc to vary the capacitive loading an cavity. antenna’s operating is tuned by changing cavity’s critical gap size. Radiation occurs...

The design and implementation of a wideband single-mode dielectric resonator antenna (DRA) with substrate integrated cavity-backed structure is presented in this paper. Two short-circuited striplines differential feeding are placed inside the cavity (SIC) for pure mode excitation DRA, providing stable radiation characteristics, low cross polarization levels. coupled to cylindrical DRA through a...