79GHz Antenna Gain Enhancement by Using Planar Dielectric Lens on the Housing

This paper presents the gain enhancement of the 79GHz single patch antenna by using a rectangle planar dielectric lens on the housing. The dielectric lens is mounted on the housing and realized by a 3D printer. The lens consists of five different areas for phase compensation of electromagnetic waves. Different dielectric lens areas are manufactured with different drilling percentages to be equivalent to required effective dielectric constants. The peak gain of the rectangle planar dielectric lens with 17.5mmx15.68mm on the top of the single patch antenna is 11.9 dBi, which can increase by 4.75 dBi in the broadside direction compared with the standalone patch antenna without the rectangle planar dielectric lens on the housing.