77-GHz MEMS brick-wall antenna fed by coupled microstrip lines

In this paper, a novel MEMS antenna array is presented. It can be fabricated on a single silicon wafer without any need for wafer bonding or hybrid integration. The proposed array is of the wire-grid type, namely a "brick-wall" structure. Such array can be built by connecting a number of radiating wires via a number of connectors. Unlike the regular arraying technique, the radiating elements of the wire-grid array are non distinguishable from the feeding network. For the same directivity, the brick-wall array has smaller size than the regular array. Moreover, brick-wall antenna array offers very low cross-polarization level.