Design of a Vlasov antenna with reflector
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The Vlasov antenna, composed of a slant-cut radiator and a parabolic cylinder reflector, is designed by using vector diffraction theory. The experiential formulae on the antenna design are given. A C-band Vlasov antenna, composed of a cylindrical waveguide of 4.5 cm radius with 35° as the bevel-cut angle, and a reflector, was designed. The calculations and measurement results show that the antenna can work over a wide bandwidth (from 3.6 GHz to 5.6 GHz). The gain is about 21 dBi at 4 GHz and over 23 dBi at 5.6 GHz. The energy emission efficiency exceeds 90% at 4 GHz and the overall efficiency exceeds 88% in the range from 3.6 GHz to 5.6 GHz.
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