Search for dissertations about: "2014 antenna"

Showing result 1 - 5 of 30 swedish dissertations containing the words 2014 antenna.

2. 1. Wireless Sensor Network Systems in Harsh Environments and Antenna Measurement Techniques

   Author : Mathias Grudén; Anders Rydberg; Mikael Gidlund; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wireless Sensor Network; Antenna; Jet engine; Train; Reverberation chamber; WISENET; Wisejet; Engineering Science with specialization in Microwave Technology; Teknisk fysik med inriktning mot mikrovågsteknik;

   Abstract : Wireless sensor network (WSN) has become a hot topic lately. By using WSN things that previously were difficult or impossible to measure has now become available. One of the main reasons using WSN for monitoring is to save money by cost optimization and/or increase safety by letting the user knowing the physical status of the monitored structure. READ MORE

4. 2. Coding and Transmission Strategies for Secrecy

   Author : Mattias Andersson; Mikael Skoglund; Matthieu Bloch; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

   Abstract : In this thesis we consider several problems relating to information theoretic security. The wiretap channel is the simplest information theoretic setting which takes security into account, and in the first chapters of the thesis we design some practical coding schemes for this channel model. READ MORE

5. 3. Waveguide-Integrated MEMS Concepts for Tunable Millimeter-Wave Systems

   Author : Zargham Baghchehsaraei; Joachim Oberhammer; Tauno Vähä-Heikkilä; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : This thesis presents two families of novel waveguide-integrated components based on millimeter-wave microelectromechanical systems (MEMS) for reconfigurable systems. The first group comprises V-band (50–75 GHz) and W-band (75–110 GHz) waveguide switches and switchable irises, and their application as switchable cavity resonators, and tunable bandpass filters implemented by integration of novel MEMS-reconfigurable surfaces into a rectangular waveguide. READ MORE

6. 4. Development and application of ultra-sensitive fluorescence spectroscopy and microscopy for biomolecular interaction studies

   Author : Lei Xu; Jerker Widengren; Gerhard Schütz; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; single molecule spectroscopy; fluorescence correlation spectroscopy; stimulated emission microscopy; cancer; biomolecular interaction; co-localization; Biological Physics; Biologisk fysik;

   Abstract : This thesis describes the development of sensitive and high-resolution fluorescence spectroscopic and microscopic techniques and their application to probe biomolecules and their interactions in solution, lipid membrane model systems and in cells. Paper I-IV are largely focused on methodological developments. READ MORE

7. 5. Optimal Near-field Antenna Apertures in Lossy Media

   Author : Aidin Razavi; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; optimal near-field aperture; near-field focusing; near-field antennas; near-field power transfer; array signal processing.; maximum penetration;

   Abstract : Antennas are traditionally designed for far-field applications such as wireless communications, radar, etc., where the antenna systems interact with other systems and objects which are located in the far-field zone of the antennas. READ MORE