On aperture coupling based compact system of lens enhanced phased array

Abstract

We present design and implementation of the aperture coupling based compact system of lens enhanced phased array (LEPA) for 60 GHz band high-speed internet, data and voice channels. The LEPA is a high-directivity steerable integrated system without putting penalties on the chip size and DC power consumption. The core of a LEPA is composed of the antenna-filter-antenna (AFA) structures consisting of two layers of 15 mil-thick low-loss microwave laminates and three 18um-thick copper layers. An incident wave with proper polarization is received by the top slot in the input side, passes through a half-wave stripline resonator, and then reradiates from the bottom slot on the output side with orthogonal polarization. Vias surrounding AFA elements guarantee that no parallel plate modes are excited between the two grounds, while any surface wave modes formed on the reactive surface of the array may still contribute to the occurrence of blind scan angles and need to be suppressed.