Search for dissertations about: "compact antenna"

Showing result 1 - 5 of 34 swedish dissertations containing the words compact antenna.

  1. 1. Investigating and Enhancing Performance of Multiple Antenna Systems in Compact MIMO/Diversity Terminals

    Author : Shuai Zhang; Sailing He; Raj Mittra; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multiple antennas; planar inverted-F antenna; mutual coupling; slot antenna; compact antenna; mobile antenna; Q factors; antenna array; ultra-wideband UWB antenna; pattern diversity; polarization diversity; user effects; adaptive arrays; chassis mode;

    Abstract : Today, owners of small communicating device are interested in transmitting or receiving various multimedia data. By increasing the number of antennas at the transmitter and/or the receiver side of the wireless link, the diversity/Multiple-Input Multiple-Output (MIMO) techniques can increase wireless channel capacity without the need for additional power or spectrum in rich scattering environments. READ MORE

  2. 2. Systematic Antenna Design Using the Theory of Characteristic Modes

    University dissertation from Lund University

    Author : Zachary Miers; [2016-11-02]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Theory of Characteristic Modes; Antenna Design; Antenna; Characteristic Modes; Computational Electromagnetics; MIMO Systems; MIMO Antenna; MIMO; Mutual Coupling; Mobile Antenna;

    Abstract : The day Faraday moved a magnet in and out of a wire loop and detected the time-varying magnetic field, the first wireless transmitter / receiver system was created and the world was changed forever. However, it took almost fifty years for Heinrich Hertz to use Maxwell's equations and Faraday's insights in his professorship at Karlsruhe to create the first electromagnetic wireless communication system using a spark gap dipole transmitter and a loop antenna-based receiver. READ MORE

  3. 3. Decoupling and Evaluation of Multiple Antenna Systems in Compact MIMO Terminals

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Hui Li; Sailing He; Cyril Luxey; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multiple antennas; mutual coupling; compact antennas; frequency reconfigurable antennas; pattern reconfigurable antennas; meta-material antennas; mobile antennas; fractal antennas; collocated antennas; antenna measurement.;

    Abstract : Research on multiple antenna systems has been a hot topic in recent years due to the demands for higher transmission rate and more reliable link in rich scattering environment in wireless communications. Using multiple antennas at both the transmitter side and the receiver side increases the channel capacity without additional frequency spectrum and transmitted power. READ MORE

  4. 4. Design and Evaluation of Compact Multi-antennas for Efficient MIMO Communications

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Ruiyuan Tian; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; antenna; propagation channel; MIMO system; wireless communication;

    Abstract : The use of multi-antenna systems with multiple-input multiple-output (MIMO) technology will play a key role in providing high spectrum efficiency for next generation mobile communication systems. This thesis offers valuable insights on the design of compact multi-antennas for efficient MIMO communications. READ MORE

  5. 5. Performance characterization of compact multiple antenna terminals

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Vanja Plicanic; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Co-band multi-antenna implementation in realistic compact user terminals is of great interest to the wireless telecom industry for achieving high data rates. This licentiate thesis focuses on the mechanisms behind the implementation of multiple antennas for diversity and MIMO gains in everyday user terminals. READ MORE