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2020 results about "Media layer" patented technology

Media layer is an Apple Inc. term that refers to software frameworks and technologies that enable audio, visual and other multimedia capabilities within an iOS powered device.

Terahertz plane adsorbing material

The invention provides a terahertz plane adsorbing material, belonging to the technical field of electromagnetic function materials and relating to an electromagnetic-wave absorbing material. The terahertz plane adsorbing material comprises a substrate, a metal reflecting layer, a dielectric layer and an artificial electromagnetic medium layer; wherein, the metal reflecting layer is a continuous metal film and is arranged on the surface of the substrate; the dielectric layer is arranged between the metal reflecting layer and the artificial electromagnetic medium layer; the artificial electromagnetic medium layer is composed of artificial electromagnetic medium units which are arrayed periodically, each unit is a centro-symmetric figure formed by metal film lines with line width which is t and comprises two sing-opening metal rings which are connected backwards with long edges at two sides of an electric snap ring resonator. The terahertz plane adsorbing material provided by the invention has two strong-absorption frequency ranges, so as to provide selective adsorption and detection at different frequency ranges, and the terahertz radiation with wider spectral range can be adsorbed, so as to improve the performance and efficiency of the terahertz plane adsorbing material.

Double-sideband suppressed-carrier radar to null near-field reflections from a first interface between media layers

A ground-penetrating radar comprises a software-definable transmitter for launching pairs of widely separated and coherent continuous waves. Each pair is separated by a constant or variable different amount double-sideband suppressed carrier modulation such as 10 MHz, 20 MHz, and 30 MHz Processing suppresses the larger first interface reflection and emphasizes the smaller second, third, etc. reflections. Processing determines the electrical parameter of the natural medium adjacent to the antenna.
The modulation process may be the variable or constant frequency difference between pairs of frequencies. If a variable frequency is used in modulation, pairs of tunable resonant microstrip patch antennas (resonant microstrip patch antenna) can be used in the antenna design. If a constant frequency difference is used in the software-defined transceiver, a wide-bandwidth antenna design is used featuring a swept or stepped-frequency continuous-wave (SFCW) radar design.
The received modulation signal has a phase range that starts at 0-degrees at the transmitter antenna, which is near the first interface surface. After coherent demodulation, the first reflection is suppressed. The pair of antennas may increase suppression. Then the modulation signal phase is changed by 90-degrees and the first interface signal is measured to determine the in situ electrical parameters of the natural medium.
Deep reflections at 90-degrees and 270-degrees create maximum reflection and will be illuminated with modulation signal peaks. Quadrature detection, mixing, and down-conversion result in 0-degree and 180-degree reflections effectively dropping out in demodulation.

Silicon-based multi-layer cavity filter

The invention discloses a silicon-based multi-layer cavity filter, which is formed by superposing more than two medium layers up and down, wherein a through hole is formed in each medium layer; an internal wall metal layer which is formed by using a silicon micro-machining technology is arranged on an internal wall of the through hole; an intermediate metal layer which is formed by using the silicon micro-machining technology is arranged between the two adjacent medium layers; an inter-stage coupling window is arranged on the intermediate metal layer; an upper surface of a top medium layer and a lower surface of a bottom medium layer are respectively provided with a surface metal layer which is formed by using the silicon micro-machining technology; a metal layer which is contacted with the upper and lower surfaces of each medium layer and an internal wall metal layer form a resonant cavity; and an input tap lead is arranged on one resonant cavity, and an output tap lead is arranged on another resonant cavity. The silicon-based multi-layer cavity filter is small in size, has a shielding function, can meet the accuracy requirement of microwave/millimeter wave frequency band, and is free from encapsulation, good in device consistency, compatible with an integrated circuit process, easy to implement system integration and convenient to assemble and debug.
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