Sökning: "slot waveguide"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden slot waveguide.

  1. 1. Towards Gap Waveguide Array Antenna for Millimeter Wave Applications

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Abbas Vosoogh; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gap waveguide; Electric Discharge Machining EDM ; Artificial Magnetic Conductor AMC ; slot array antenna; low sidelobe; high effciency; millimeter wave; aperture efficiency; Bandpass filter BPF ;

    Sammanfattning : The millimeter wave frequency range has got a lot of attention over the past few years because it contains unused frequency spectrum resources that are suitable for delivering Gbit/s end-user access in areas with high user density. Due to the limited output power that current RF active components can deliver in millimeter waves, antennas with the merits of low profile, high gain, high effciency and low cost are needed to compensate free space path loss and increase the communication distance for the emerging high data rate wireless systems. LÄS MER

  2. 2. Gap Waveguide: Low Loss Microwave Passive Components and MMIC Packaging Technique for High Frequency Applications

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Ashraf Uz Zaman; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Quasi TEM; Slot Array; PMC; Gap waveguide; Narrow-band Filter;

    Sammanfattning : The heavy congestion at the existing radio frequency spectrum allocated for the today’s wireless communications motivates and accelerates the research work at mmWave bands or even higher frequency range where more spectrum space is available for massive data rate delivery. The inclination of modern wireless system research and development is towards small size, reliable, high-performance and high-yield microwave multifunctional products. LÄS MER

  3. 3. Investigation of New Concepts and Solutions for Silicon Nanophotonics

    Detta är en avhandling från Stockholm : KTH

    Författare :Zhechao Wang; KTH.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Planar integrated circuit; silicon photonics; slot waveguide; finite-difference time-domain; waveguide grating coupler; ring resonator; polarization diversity scheme; polarization beam splitter; polarization rotator; hybrid silicon laser; epitaxial lateral overgrowth; chemical-mechanical polishing.; NATURAL SCIENCES Physics Other physics Optics; NATURVETENSKAP Fysik Övrig fysik Optik;

    Sammanfattning : Nowadays, silicon photonics is a widely studied research topic. Its high-index-contrast and compatibility with the complementary metal-oxide-semiconductor technology make it a promising platform for low cost high density integration. LÄS MER

  4. 4. Integrated Optical Slot-Waveguide Ring Resonator Sensor Arrays for Lab-on-Chip Applications

    Detta är en avhandling från Stockholm : KTH

    Författare :Kristinn Björgvin Gylfason; KTH.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biosensor; label-free biosensing; ring resonator; optical waveguide; lab-on-a-chip; TECHNOLOGY Electrical engineering; electronics and photonics Electronic measurement and instrumentation; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elektronisk mät- och apparatteknik; TECHNOLOGY Electrical engineering; electronics and photonics Photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Fotonik;

    Sammanfattning : This thesis treats the development of an integrated optical sensor array. The sensors are slot-waveguide ring resonators, integrated with on-chip surface grating couplers and light splitters, for alignment tolerant, real-time, refractive index sensing, and label-free biosensing. LÄS MER

  5. 5. Slot Array Antennas at V-band based on Inverted Microstrip Gap Waveguide

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Jinlin Liu; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; inverted microstrip gap waveguide; metallic pins; perfect magnetic conductor; slots array and variational method;

    Sammanfattning : Recently, gap waveguide technology is introduced as a proper guiding structure for millimeter-systems. The conception of gap waveguide technology can be modeled for theoretical analysis by two parallel plates, a top perfect electric conductor layer and a bottom perfect magnetic conductor layer. LÄS MER