A 3-D Printed Broadband Circularly Polarized All-dielectric Millimeter-Wave Transmitarray Antenna

Abstract

A novel broadband circularly polarized (CP) all-dielectric transmitarray antenna (TA) in millimeter-wave (mmWave) band is designed using “Hamburger” shaped unit-cell in this paper. A circular contour TA is constructed by optimizing the transmission phase of each unit-cell to realize a specific phase distribution on the TA surface. The proposed TA is fabricated using 3-D printing technology. It achieves a peak gain of 27.8 dBi with an aperture efficiency of 46.7% at 39 GHz, a 1-dB gain bandwidth of 22.1% and a 3-dB ARBW of 21%, respectively.