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Design of an electronically steerable dielectric helical antenna phased array for millimeter wave applications

An electronically steerable dielectric helical antenna phased array for millimeter wave applications is designed in this paper. The phased array consists of three dielectric helical antenna units, a coaxial probe feed port and two grounding ports with tunable capacitor. Its center frequency is 29.7 GHz, effective axial ratio bandwidth is 660 MHz, peek gain is 10.3 dBi, radiation efficiency is over 90%. In addition, the phased array has beam scanning function of ± 20 degrees at the center frequency. The simulation results show that the electronically steerable phased dielectric helical antenna array can be used in millimeter wave wireless communication system.