Design of Aperture-coupled Vivaldi-antenna Array with Scan-range-improving Parasitic Resonators for Ka-band

Abstract

We present a linear Vivaldi-antenna array with a misalignment-robust non-galvanic transition and scan-range-improvingparasitic resonators for 5G FR2-1 base-station applications. The array covers most of the Ka-band (26.5–40 GHz) on a scan range of ±60◦ with a total active reflection coefficient of below −10 dB and a scan gain of above 10 dBi. Furthermore, the parasitic resonators increase the scan range to ±85◦ between 30 and 35 GHz. A prototype of the array is measured and the performance is confirmed to coincide well with the simulations.