Design of a Printed 5G Monopole Antenna With Periodic Patch Director on the Laminated Window Glass

This letter proposes a printed fifth-generation (5G) monopole antenna with a periodic patch director that can be applied to a laminated window glass of a vehicle. The proposed monopole antenna is printed on the laminated window glass, which does not require additional mounting space. The rectangular disk is loaded at the end of the monopole to improve a bore-sight gain. To further improve the gain characteristic, the periodic patch director elements are arranged with optimized array spacing. To verify the antenna performances, such as reflection coefficients and radiation patterns, the proposed antenna is fabricated and measured in a full anechoic chamber. The results demonstrate that the proposed monopole antenna with the periodic patch director is suitable for applying in vehicle 5G communication band of n257.