A 60 GHz circularly polarized antenna array for line-of-sight train-to-train communication

In this paper, an antenna module for an ultra-low latency system for line-of-sight train-to-train communication is presented. This module consists of a high-directivity 60 GHz circularly-polarized antenna array, which consists of slot-fed truncated-corner patch antennas. Furthermore, it employs a microstrip-to-stripline via transition and Balun to provide balanced line to be integrated to mm-wave transceiver chip on the RF-frontend. Additionally, a radome has also been designed to protect the antenna against the open environment, since it will be integrated at the mechanical coupler of a train. Finally, measurement results of the antenna module with the radome will be provided, which shows relatively low sidelobe level and 5.1 GHz axial ratio (AR) bandwidth.