title: Three-dimensional super-wideband micro-antenna for high-resolution millimeter-wave medical imaging.
abstract: This paper reports on a novel super-wideband micro-hemispherical antenna with application in millimeter-wave medical imaging. The antenna is composed of a hemispherical shell suspended above a substrate and can be fabricated using a fabrication technology originally developed for micron-scale electromechanical resonators. The antenna exhibits a wide fractional bandwidth of more than 80% (from 64 GHz to 150 GHz) and a high gain of 8.6 dBi at its center frequency. Radiation parameters of the antenna are characterized and the effect of its super-wideband behavior on pulsed millimeter-wave imaging is demonstrated. Finally, a preliminary array configuration composed of two antennas placed side-by-side in the vicinity of a skin-mimicking target is evaluated and the ability to fully detect the target has been demonstrated.
authors.forename: Amir
authors.initials: A
authors.lastname: Mirbeik
authors.forename: Vahid
authors.initials: V
authors.lastname: Tavassoli
authors.forename: Farrokh
authors.initials: F
authors.lastname: Ayazi
authors.forename: Negar
authors.initials: N
authors.lastname: Tavassolian
mesh_terms: D000465:Algorithms; D003952:Diagnostic Imaging / Q000379:methods*; D004867:Equipment Design; D006801:Humans; D021621:Imaging, Three-Dimensional; D008403:Mass Screening / Q000379:methods; D008872:Microwaves; D016011:Normal Distribution; D012825:Silicon / Q000737:chemistry; D012867:Skin / Q000473:pathology / Q000503:physiopathology*; D012878:Skin Neoplasms / Q000473:pathology
chemical_list: D012825:Silicon