Search for dissertations about: "wide band antenna"

Showing result 1 - 5 of 36 swedish dissertations containing the words wide band antenna.

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

   Author : Shuai Zhang; Sailing He; Raj Mittra; KTH; []
   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

4. 2. Wide-angle scanning wide-band phased array antennas

   Author : Anders Ellgardt; Martin Norgren; Lars Josefsson; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; Elektroteknik;

   Abstract : This thesis considers problems related to the design and the analysis of wide-angle scanning phased arrays. The goals of the thesis are the design and analysis of antenna elements suitable for wide-angle scanning array antennas, and the study of scan blindness effects and edge effects for this type of antennas. READ MORE

5. 3. Contribution to Wideband SAR Space-Time Processing, and Radar Remote Sensing of Sea Ice

   Author : Mats I. Pettersson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAR; clutter suppression; space time adaptive processing; backprojection; remote sensing; moving target detection; radar scattering; Antenna array; wide band; sea ice;

   Abstract : Synthetic Aperture Radar (SAR) has the capability to map the Earth with high resolution and is used in both civilian and military applications. The development of SAR systems is going towards higher resolution. Today there are Wide Band (WB) SAR instruments that have a resolution actually smaller than the operating wavelength. READ MORE

6. 4. Dual Band Prime Focus Feed for Satellite Earth Terminals

   Author : Yogesh Karandikar; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reflector Antenna; Choke Horn; Eleven Feed; satellite earth terminals;

   Abstract : Satellite Communication systems have been studied and developed since long. With more high frequency satellite bands coming in the market, there is a need to develop suchsystems with multi-band or wideband operation with reconfigurable antennas which can provide simultaneous transmit receive capabilities on different polarizations as well as have properties suitable to track the satellite. READ MORE

7. 5. Non-galvanic Interconnects for Millimeter-wave Systems

   Author : Ahmed Adel Hassona; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; interconnects; THz; taper; waveguide transition; MMIC; InP; WR-6.5.; slot antenna; CMOS; eWLB; LTSA; finline; millimeter-wave; SiC; D-band; GaAs;

   Abstract : Fueled by the increasing demand for higher data rates, millimeter-wave (mmW) systems emerged as a candidate that can provide multi-gigabit per second (Gb/s) transmission. This demand is mainly driven by modern communication systems and several other wireless and sensing applications such as production quality inspection and imaging systems. READ MORE