Sökning: "rectangular waveguide"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden rectangular waveguide.

  1. 1. Gap Waveguide Technology- Electromagnetic Packaging and Transitions

    Författare :Astrid Algaba Brazalez; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rectangular waveguide; packaging; transition; coplanar waveguide; microstrip; millimeter waves; gap waveguide; perfect magnetic conductor;

    Sammanfattning : The scarcity of available frequency bands for new wireless communication systems, as well as the growing need for higher capacity, motivates the current interest in moving upwards in frequency. The millimeter wave frequencyrange is very attractive to allocate potential commercial opportunities such as short range wireless communications that allow high-speed data/video transmission, and automotive radars for both driver assistance and increasedsafety. LÄS MER

  2. 2. Micromachined Gap Waveguide Devices

    Författare :Sofia Rahiminejad; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MEMS; Gap waveguides; RF; High frequency; GHz; Waveguide;

    Sammanfattning : Gap waveguide technology is a new technology that is well suited for millimeter and submillimeter applications. Compared to conventional rectangular waveguides, this technology does not need any solid conductive walls to confine the wave by utilizing metamaterial surfaces such as "bed of nails" that creates an artificial magnetic conductive surface (AMC). LÄS MER

  3. 3. Monocrystalline-Silicon Based RF MEMS Devices

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Mikael Sterner; KTH.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; RF MEMS; radio frequency; microelectromechanical system; microsystem technology; monocrystalline silicon; switch; tuneable capacitor; high-impedace surface; phase shifter; rectangular waveguide; transmission line;

    Sammanfattning : This thesis presents novel radio-frequency microelectromechanical (RF MEMS) devices, for microwave and millimeter wave applications, designed for process robustness and operational reliability using monocrystalline silicon as structural material. Two families of RF MEMS devices are proposed. LÄS MER

  4. 4. Gap Waveguide Technology for Millimeter Wave Applications and Integration with Antennas

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Elena Pucci; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Array Antennas.; Microstrip Lines; Micromachining; Artificial Magnetic Conductors; Millimeter Waves; Waveguide Resonators; Packaging of Microwave Components; Gap Waveguides; Losses;

    Sammanfattning : The increasing advance of short range wireless communications requiring high data rates and the lack of available spectrum have driven researchers and industry to move towards higher frequencies, in particular to the millimeter wave range. The opening of this wide portion of free spectrum has risen a large interest in developing mm-wave communication systems for commercial applications. LÄS MER

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

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Ashraf Uz Zaman; [2013]

    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