Ultra-thin metasurface microwave flat lens for broadband applications.
Sign Up to like & getrecommendations! Published in 2017 at "Applied physics letters"
DOI: 10.1063/1.4984219
Abstract: We demonstrate a metasurface-based ultrathin flat lens operating at microwave frequencies. A series of subwavelength metallic split-ring resonators, which are sandwiched between two cross-polarized metallic gratings, are defined to obtain a radially symmetric parabolic phase… read more here.
Keywords: ultra thin; flat lens; microwave flat; metasurface ... See more keywords
Detailed Characterization of a Lenster—A mm-Wave Flat Lens
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Antennas and Propagation"
DOI: 10.1109/tap.2019.2902435
Abstract: We perform detailed free-space measurements of a previously published metal-mesh thin flat gradient index lens using a vector network analyzer. Direct measurements of the transmission and phase of the lens are made over the frequency… read more here.
Keywords: wave flat; flat lens; lenster wave; characterization lenster ... See more keywords
Millimeter-Wave Holographic Flat Lens Antenna for Orbital Angular Momentum Multiplexing
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Antennas and Propagation"
DOI: 10.1109/tap.2020.3048527
Abstract: In this article, a holograph-inspired flat lens antenna capable of simultaneously transmitting two independent coaxially propagating orbital angular momentum (OAM) beams operating at 60 GHz is proposed. In the flat lens design, holographic theory including… read more here.
Keywords: flat lens; angular momentum; lens antenna; millimeter wave ... See more keywords
Multiple super-resolution imaging in the second band of gradient lattice spacing photonic crystal flat lens
Sign Up to like & getrecommendations! Published in 2020 at "Chinese Optics Letters"
DOI: 10.3788/col202018.120501
Abstract: Based on the triangular lattice two-dimensional photonic crystal (PC), the lattice spacing along the transverse direction to propagation is altered, and a gradient PC (GPC) flat lens is designed. The band structures and equal frequency… read more here.
Keywords: resolution imaging; flat lens; super resolution; photonic crystal ... See more keywords