Abstract
Grid antenna array (GAA) is a kind of planar array antenna with multiple rectangular loops. It can flexibly function either as a traveling-wave or non-traveling-wave antenna. This chapter lists clearly the different variations of the GAA and reviews briefly its theory development as well as applications. With a focus of the resonant GAA for 60-GHz millimeter-wave applications, the basic theory and operation are explored for the basic single-feed, dual-feed, and sub-array structures. More importantly, the further integration of the GAA as an antenna-in-package (AiP) module is presented with the design, fabrication, and test details at 60 GHz. The chapter finally reviews the state-of-the-art GAA millimeter-wave applications showing that the GAA really has wide applications from low microwave frequencies even to 120-GHz millimeterwave frequencies.
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