Design of high-performance antenna systems with quasi-periodic surfaces
Periodic surfaces (identical array elements) have existed for several decades. However, in recent years, there is an interest in replacing such surfaces with quasi-periodic surfaces (non-identical array elements). Quasi-periodic surfaces provide additional degrees of freedom and can be used to enhance existing antenna solutions or to provide new innovative concepts for future applications. Quasi-periodic surfaces usually consist of several thousands of array elements, thus an appropriate and efficient synthesis is a challenging task. In this paper, we present a general design framework for the design of high-performance antenna systems with quasi-periodic surfaces. The design framework is based on the use of accurate analysis methods used in conjunction with a large-scale direct optimization approach where all array elements in the quasi-periodic surface are optimized simultaneously in their final operational environment to directly fulfill certain pattern specifications. Using the proposed design approach, quasi-periodic surfaces that consist of more than tens of thousands of array elements can be optimized.
Publication: EuCAP 2018
Place: London, United KingdomDownload PDF