Global ETD Search
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Showing 1 to 14 of 14 for “"antenna-coupled"”.
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Far-infrared radiation response of antenna-coupled quantum-effect devices
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Antenna-coupled Infrared And Millimeter-wave Detectors: Fabrication, Measurement And Optimization
Antenna-coupled detectors provide uncooled, cost-effective solutions for infrared and millimeter-wave imaging. This work describes the design, fabrication, measurement, and optimization of several types of antenna-coupled detectors for LWIR (8 - 12 µm) and 94 GHz radiation. Two types of …
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Antenna-coupled Tunnel Diodes For Dual-band Millimeter-wave/infrared F
… of overall size and weight. We have developed antenna-coupled sensors that respond simultaneously at 30 THz and at 94 GHz, utilizing electron-beam lithography. Slot-antenna designs were found to be particularly suitable for coupling radiation into metal-oxide-metal (MOM) tunnel diodes at both …
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Development of antenna-coupled metal-insulator-metal diodes for infrared detection
… that operates at room temperature in this band. Antenna-coupled metal-insulator-metal (ACMIM) diodes are a leading candidate due to their high speed and potential manufacturability on Si substrates. In this work, Ni-NiO-Ni ACMIM diodes are fabricated using a two-step lithography process and an …
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Transmission Lines For Ir Signal Routing
… point of view of developing interconnections for antenna-coupled infrared detectors operating in the 8- to 12-micron wavelength range. To our knowledge, no previous efforts have been made to study the performance of metallic-wire transmission lines at infrared frequencies. Both the design and …
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Efficient THz lasers and broadband amplifiers based on quantum cascade gain media
… and characterization of the microstrip antenna coupled third-order distributed feedback QC lasers aimed for 2.060 THz atomic oxygen line. THz travelling-wave QC amplifiers are highly desired to achieve broadband amplification of THz radiation in free space. The second part of the thesis …
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THz Radiation Detection Based on CMOS Technology
… power coupling efficiency with the integrated antenna, as well as the antenna-detector impedance-matching condition. The implemented antenna-coupled FET detector structures aim to improve the detection behavior in terms of responsivity and noise equivalent power (NEP) for CMOS based imaging …
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Terahertz Detectors and Imaging Array with In-Pixel Low-Noise Amplification and Filtering in CMOS technologies
… is related to the investigation of variants of antenna-coupled field effect transistor and schottky barrier diode in standard 180 nm CMOS process as examples of direct detectors. During laboratory characterization, detection of terahertz radiation from schottky diode could not be achieved due to …
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Design, Fabrication, and Measurement of a Multiple-Input Multiple-Output (MIMO) Antenna for Mobile Communication
… characterization of a multiband uniplanar MIMO antenna for hand-held mobile communication devices on LTE, WLAN, and WMAN networks. The antenna design methodology combined a variety of broadbanding techniques that resulted in a single-layer hybrid monopole antenna coupled to a meander line …
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Advanced light manipulation and waveguiding in plasmonic nanostructured optical fibers.
… and panda-shaped PM-optical fibers. A Yagi-Uda antenna-coupled low loss plasmonic slot waveguide is directly integrated on the optical fiber by direct milling technique. We demonstrated efficient coupling of light from the fiber core to the plasmonic slot waveguide. The light is then propagated …
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Novel techniques for improved indoor positioning and localization using HF RFID
… a novel concept of multi-loop bridge reader antenna to localise moving objects such as autonomous wheelchairs in indoor environments. Typical HF RFIDs operate at 13.56 MHz and employ passive tags which are excited by the magnetic field radiated by the reader antenna. Positioning of moving …
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Physics and Engineering of Photoelectric Tunable-step Terahertz Detectors Based on High Mobility III-V Semiconductor Structures
… of the IPPE effect on parameters, including antenna geometry, material, heterostructure design, operating temperature, illumination condition, etc., is systematically investigated for room-temperature PETS THz detectors with high responsivity and fast response speed. Firstly, a systematic …
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Interaction of Terahertz Radiation with Semiconductor Nanostructures and Quantum Systems
… electron gas (2DEG). It is based on a novel antenna-coupled, dual-gated device architecture. After simulation of the antenna design, the fabrication procedure is developed and successfully processed samples are demonstrated. Then the journey of searching for and finding a THz response is …