Search for dissertations about: "balun"

Showing result 11 - 15 of 25 swedish dissertations containing the word balun.

2. 11. High Performance LNAs and Mixers for Direct Conversion Receivers in BiCMOS and CMOS Technologies

   Author : TOBIAS TIRED; Institutionen för elektro- och informationsteknik; []
   Keywords : LNA; mixer; direct conversion receiver;

   Abstract : The trend in cellular chipset design today is to incorporate support for a larger number of frequency bands for each new chipset generation. If the chipset also supports receiver diversity two low noise amplifiers (LNAs) are required for each frequency band. This is however associated with an increase of off-chip components, i.e. READ MORE

4. 12. Development of the Eleven Antenna - A Decade Bandwidth Feed for Reflector Antennas

   Author : Rikard Olsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : Recently there has been a growing interest in reducing the number of antennas on different platforms by combining several functions in the same antenna. To achieve this, the multifunction antenna needs to be either very broadband or multi band to cover the frequencies of all functions. READ MORE

5. 13. Baluns, Hybrids and Power Dividers for Ultra- Wideband Antennas

   Author : Syed Hasan Raza Zaidi; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multiport feeding network; baluns; packaging; power divider; Ultra-wideband; Eleven feed; gap waveguide; ring hybrid.;

   Abstract : UWB (ultra wideband), depending on the application requirement, is usually referred to 2:1 bandwidth for radio/wireless applications. Here in this thesis it is also used to denote extremely wideband antenna and components at several octave bandwidth, particularly for high frequency applications, such as the 1 – 10 GHz antenna system needed for the Square Kilometer Array (SKA) radio telescope and the 2 – 14 GHz antenna system for the VLBI2010 (Very Long Base line Interferometer) project. READ MORE

6. 14. Graphene FETs in Microwave Applications

   Author : Omid Habibpour; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microwave amplifiers; S-parameters characterisation; device modelling; MMIC; device fabrication; Graphene; subharmonic resistive mixers; integrated circuits; harmonic balance analysis; microwave FETs;

   Abstract : Graphene is a one-atom-thick sheet of carbon with numerous impressive properties. It is a promising material for future high-speed nanoelectronics due to its intrinsic superior carrier mobility and very high saturation velocity. READ MORE

7. 15. Reconfigurable Receiver Front-Ends for Advanced Telecommunication Technologies

   Author : Iman Ghotbi; Integrerade elektroniksystem; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 5G; Receiver; Filter; Low-noise amplifier; FD-SOI; Calibration;

   Abstract : The exponential growth of converging technologies, including augmented reality, autonomous vehicles, machine-to-machine and machine-to-human interactions, biomedical and environmental sensory systems, and artificial intelligence, is driving the need for robust infrastructural systems capable of handling vast data volumes between end users and service providers. This demand has prompted a significant evolution in wireless communication, with 5G and subsequent generations requiring exponentially improved spectral and energy efficiency compared to their predecessors. READ MORE