[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Compact UWB Circularly Polarized Dielectric Rod Antenna Design

摘要： A novel circular-polarization (CP) ultra-wideband dielectric rod antenna design has been developed for operating from X to Ka band. The radiation tip design was based on the previous dual linear-polarization 3-layer dielectric rod design. A novel CP wave-launcher composed of conical spiral arms was developed. This launcher does not require balun or quadrature-phase hybrid. In addition, a novel quadrifilar conducting enclosure was introduced to minimize overall antenna diameter while maintaining good axial ratio at the low frequency end. The simulated antenna performance exhibits an axial ratio (AR) of less than 3 dB, stable gain, stable beamwidth, and stable phase center from 10 to 40 GHz.