Search for dissertations about: "dual polarization"

Showing result 1 - 5 of 55 swedish dissertations containing the words dual polarization.

  2. 1. Analysis and Design of Base Station Antennas for Mobile Communications

    Author : Björn Lindmark; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; polarization diversity; dual polarization; adaptive antennas; moment method; genetic algorithm; antenna arrays; radio propagation; channel sounding; aperture coupled patch;

    Abstract : The thesis deals with base station antennas and the environment they work in. Polarization diversity, dual band operation, and adaptive antenna systems are discussed with emphasis on how antennas for these applications should be designed. We compare the polarization diversity performance of different types of dual polarized antenna elements. READ MORE

  4. 2. Polarization diversity and array signal processing in base station antennas

    Author : Björn Lindmark; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; signal correlation; mobile communication; rayleigh fading; wireless communication; multibeam; dual band; dual polarized; multual coupling; infinite arrays; aperture coupled patch; antenna arrays;

    Abstract : .... READ MORE

  5. 3. Polarization-Resolved Particle Holography

    Author : Johan Öhman; Mikael Sjödahl; Erik Olsson; Per Bergström; Pietro Ferraro; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Experimentell mekanik; Experimental Mechanics;

    Abstract : In this thesis, measurement of particle fields using digital holography is the main subject. The questions investigated consider positioning, identification and sizing of nanometer and micrometer particles. The thesis explore these topics using both simulations and experimental measurements. READ MORE

  6. 4. Advanced Dual Circularly Polarized Antenna for Automotive Radar Systems

    Author : Zhaorui Zang; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; radar; Antenna; polarimetric radar.; automotive; gap waveguide; dual circular polarization; low-profile;

    Abstract : Advanced driver assistance systems (ADAS) promise reliable support for collision avoidance and cruise control. The demand for precise target classification and road surface sensing requires a sensor revolution. In this regard, the automotive radar system is highly expected to collect as much information as possible. READ MORE

  7. 5. Advanced Antenna Systems for Fully Polarimetric Radar in Automotive Scenario

    Author : Zhaorui Zang; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; circular polarization; gap waveguide; Antenna; dual circular polarization; automotive radar; polarimetric radar;

    Abstract : The increasing dependence on Advanced Driver Assistance Systems (ADAS) highlights the critical need for fast target recognition, effective collision avoidance, cruise control, lane assistance, etc. This necessitates a significant advancement in sensor technology, particularly for accurate target classification and road surface sensing. READ MORE