Continuous Transverse Stub Array for Ka-Band Applications


This paper presents a flat, high gain, wide scanning, broadband continuous transverse stub (CTS) array. The design procedure, the fabrication, and an exhaustive antenna characterization are described in details. The array includes sixteen radiating slots and is fed by a company-feed network in hollow parallel plate waveguide (PPW) technology. A pillbox-based mostly linear source illuminates the corporate network and allows for beam steering. The antenna is designed by using an spontanepous mode matching code recently developed for CTS arrays, providing design tips. The assembly technique ensures the electrical contact among the various stages of the network while not using any electromagnetic choke and any bonding method. The most beam of the antenna is mechanically steered over in elevation, by moving a compact horn inside the focal plane of the pillbox feeding system. Glorious performances are achieved. The options of the beam are stable within the planning twenty seven.five–thirty one GHz band and beyond, in the entire Ka-band (26.five–forty GHz). An antenna gain of about 29 dBi is measured at broadside at 29.25 GHz and scan losses lower than 2 dB are reported at . The antenna efficiency exceeds 80p.c in the full scan vary. The terribly smart agreement between measurements and simulations validates the design procedure. The proposed design is suitable for Satcom Ka-band terminals in moving platforms, e.g., trains and planes, and additionally for mobile ground stations, as a multibeam sectorial antenna.

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