Dual-band circular polarization radiating element on coupled resonators for operation in the millimeter wavelength range

The paper is devoted to the study of the possibility of realizing a technological dual-band radiating element with circular polarization for application in low-profile antenna arrays, including the millimeter wavelength range. The results of modeling of the obtained structure are presented. The proposed radiator is a system of coupled resonators, the ellipticity coefficient of which exceeds 0.8 in both ranges of operating frequencies. The coupled resonator systems are excited through a strip transmission line via a slot transition. The element gain is 6 dB and 8 dB in the receiving and transmitting bands, respectively.