Search for dissertations about: "Active antenna array"

Showing result 16 - 20 of 27 swedish dissertations containing the words Active antenna array.

2. 16. Wideband Watt-Level Spatial Power-Combined Power Amplifier in SiGe BiCMOS Technology for Efficient mm-Wave Array Transmitters

   Author : Artem Roev; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; integration; spatial power combining; substrate integrated waveguide; array amplifiers; RFIC;

   Abstract : The continued demand for high-speed wireless communications is driving the development of integrated high-power transmitters at millimeter wave (mm-Wave) frequencies. Si-based technologies allow achieving a high level of integration but usually provide insufficient generated RF power to compensate for the increased propagation and material losses at mm-Wave bands due to the relatively low breakdown voltage of their devices. READ MORE

4. 17. On dynamic array processing for GNSS software receivers

   Author : Staffan Backén; Gonzalo Seco Granados; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

   Abstract : This thesis presents contributions in the field of satellite navigation with a focus on array processing and related implementation issues. For readers not familiar with GNSS, it also includes a brief overview of satellite navigation.Compared to the state of the art only ten years ago, modern GNSS receivers are very capable. READ MORE

5. 18. 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

6. 19. Compact and Wideband Spatial Power Combining Module for mm-Wave High-Power Amplifiers

   Author : Artem Roev; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; integration; ; array amplifiers; spatial power combining; ; RFIC;

   Abstract : The continued growth of data traffic in wireless communication applications demands to launch next-generation communication services at millimeter wave frequencies. Despite the obvious advantage of a large available spectrum, using millimeter wave bands is accompanied by many technological challenges. READ MORE

7. 20. Gap Waveguide Technology for Millimeter Wave Applications and Integration with Antennas

   Author : Elena Pucci; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Array Antennas.; Microstrip Lines; Micromachining; Artificial Magnetic Conductors; Millimeter Waves; Waveguide Resonators; Packaging of Microwave Components; Gap Waveguides; Losses;

   Abstract : The increasing advance of short range wireless communications requiring high data rates and the lack of available spectrum have driven researchers and industry to move towards higher frequencies, in particular to the millimeter wave range. The opening of this wide portion of free spectrum has risen a large interest in developing mm-wave communication systems for commercial applications. READ MORE