Search for dissertations about: "tapered waveguides"

Showing result 1 - 5 of 6 swedish dissertations containing the words tapered waveguides.

  2. 1. Integrated Antenna Solutions for Wireless Sensor and Millimeter-Wave Systems

    Author : Shi Cheng; Anders Rydberg; Paul Hallbjörner; Zhining Chen; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; harmonic radar HR ; liquid alloy; millimeter-wave; micromachining; phase shifters; planar inverted cone antennas PICA ; printed circuit boards PCB ; quasi-Yagi antennas; radio frequency microelectromechanical system RF MEMS ; stretchable antennas; substrate integrate waveguides SIW ; T-matched dipole antennas; tapered slot antennas; traveling wave array antennas; ultrawideband UWB ; wireless sensor networks.; Electrical engineering; Elektroteknik; Elektronik; Electronics;

    Abstract : This thesis presents various integrated antenna solutions for different types of systems and applications, e.g. wireless sensors, broadband handsets, advanced base stations, MEMS-based reconfigurable front-ends, automotive anti-collision radars, and large area electronics. READ MORE

  4. 2. Development of capillary optics for X-ray focusing

    Author : Per Engström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; x-ray micro beams; trace element analysis; energy dispersive x-ray flourescence; focused x-ray beam; density analysis; tapered x-ray waveguides; x-ray submicron beams; x-ray guide; x-ray optics; x-ray spectroscopy; capillary optics;

    Abstract : .... READ MORE

  5. 3. Tunable Nanomaterials and their Applications for Terahertz Devices : Carbon Nanotubes and Silver Nanowires

    Author : Serguei Smirnov; Dmitri Lioubtchenko; Joachim Oberhammer; Hartmut Roskos; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The interest in terahertz (THz) technologies is growing in academia and industry. The design of electronic components at THz frequencies is relevant to application areas such as telecommunication, radar, material spectroscopy, and medical imaging and diagnosis. READ MORE

  6. 4. Planar-Goubau-line components for terahertz applications

    Author : Juan Cabello Sánchez; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; planar Goubau line; Through-Reflect-Line TRL calibration; stopband filter; on-wafer measurements; vector network analyzers VNA ; silicon membrane; power divider; Impedance-matched load; terahertz spectroscopy; microfluidic channels;

    Abstract : Terahertz-wave technology has a broad range of applications, including radio astronomy, telecommunications, security, medical applications, pharmaceutical quality control, and biological sensing. However, the sources, detectors, and components are less efficient at this frequency band due to parasitic effects and increased total losses, which hinder the performance of terahertz systems. READ MORE

  7. 5. Theoretical Investigation on Propagation and Coupling of Nonreciprocal Electromagnetic Surface Waves

    Author : Kexin Liu; Sailing He; Martin Norgren; Manfred Eich; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wave propagation; coupling; magneto-optical; gyromagnetic; photonic crystal; nonreciprocity; one-way; trapped rainbow; Electrical Engineering; Elektro- och systemteknik;

    Abstract : This thesis aims at revealing the fundamental guiding and coupling properties of nonreciprocal electromagnetic surface waves on magneto-optical or gyromagnetic media and designing novel applications based on the properties.We introduce the background in the first chapter. READ MORE