An Ultra-wideband Circularly Polarized Hemispherical Helical Antenna

In this paper, an ultra-wideband hemispherical helical antenna with a novel flake-like arms structure is proposed. The proposed hemispherical helical antenna has better impedance matching characteristics compared with the traditional hemispherical helical antenna. At the same time, a wideband balun is designed to match the designed antenna and coaxial connecter. By introducing resistance and absor...