Abstract:A novel low-axial-ratio W-band left-hand-circularlypolarized (LHCP) cylindrical waveguide feed horn antenna is described using a built-in polarizer. The built-in polarizer section of the horn consisted of nine pairs of circular cavities to generate circular polarization, eliminating the need for an external orthomode transducer or a complex septum. The polarizer was analyzed using the diff erential dispersion eff ect from the cavities along the length of the waveguide. The antenna had impedance matching ( 11 1… Show more
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