title: Dielectrically embedded flat mesh lens for millimeter waves applications.
abstract: A flat lens based on subwavelength periodic metal meshes has been developed using photolithographic techniques. These mesh grids are stacked at specific distances and embedded in polypropylene. A code was developed to optimize more than 1000 transmission line circuits required to vary the device phase shift across the lens flat surface, mimicking the behavior of a classical lens. A W-band mesh-lens prototype was successfully manufactured and its RF performance characterized using a vector network analyzer coupled to corrugated horn antennas. Co-polarization far-field beam patterns were measured and compared with finite-element method models. The excellent agreement between data and simulations validated our designing tools and manufacturing procedures. This mesh lens is a low-loss, robust, light, and compact device that has many potential applications including millimeter wave quasi-optical systems for future cosmic microwave background polarization instruments.
authors.affiliation: The University of Manchester-School of Physics and Astronomy, Manchester, UK. giampaolo.pisano@manchester.ac.uk
authors.forename: Giampaolo
authors.initials: G
authors.lastname: Pisano
authors.forename: Ming Wah
authors.initials: MW
authors.lastname: Ng
authors.forename: Fahri
authors.initials: F
authors.lastname: Ozturk
authors.forename: Bruno
authors.initials: B
authors.lastname: Maffei
authors.forename: Vic
authors.initials: V
authors.lastname: Haynes