Search for dissertations about: "dual-polarization"

Showing result 1 - 5 of 22 swedish dissertations containing the word dual-polarization.

  1. 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

  2. 2. Direction finding, beamforming and mutual coupling in base station antenna arrays

    Author : Staffan Lundgren; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mutual coupling; adaptive arrays; direction finding; base station antennas; mobile communications; phase-only nulling; beamforming; dual polarization; butler matrix;

    Abstract : .... READ MORE

  3. 3. Interfacial Properties of Film Forming Proteins and their Layer-by-Layer Assembly with Nanoparticles

    Author : Olga Krivosheeva; Per Claesson; Thomas Arnebrant; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; protein adsorption; mussel adhesive protein; Mefp-1; hydrophobins; HFBI; HFBII; adsorption kinetics; layer-by-layer; stability; cross-linking; zeta-potential; dual polarization interferometry; quartz crystal microbalances;

    Abstract :  The aim of this thesis work was to investigate the interfacial properties of film forming proteins, stability of the layers created by them, and their interactions with nanoparticles. Mussel adhesive protein (Mefp-1) and hydrophobins (HFBI and HFBII) were the three main proteins used. READ MORE

  4. 4. Characterization and Applications of Vector Phase-Sensitive Amplifiers

    Author : Abel Lorences Riesgo; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; parametric amplification; phase-sensitive amplification; fiber nonlinearities; four-wave mixing; all-optical processing;

    Abstract : This work is devoted to the characterization of vector phase-sensitive amplifiers and processors. A detailed analysis of degenerate vector phase-sensitive amplifier (PSA) is performed.The gain and phase-sensitive extinction ratio are theoretically analyzed using three-wave theory. READ MORE

  5. 5. Phase-Sensitive Parametric Signal Processing in Optical Communications

    Author : Abel Lorences Riesgo; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : This thesis covers the analysis of several schemes for parametric processing in fiberoptic communication systems, focusing mainly on phase-sensitive processing. Vector phase-sensitive amplifiers are characterized and phase regeneration of a dualpolarization (DP)-binary phase-shift keying signal (BPSK) signal is experimentally demonstrated. READ MORE