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Showing result 1 - 5 of 43 swedish dissertations matching the above criteria.
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1. Theory and Design of Wideband Doherty Power Amplifiers
Abstract : The Doherty power amplifier (DPA) is one of the most popular power amplifier architectures for obtaining high average efficiency for modern communication signals with high peak-to-average power ratios (PAPR). However, the DPA suffers from often having narrowband performance which limits its capabilities in wideband and/or multi-standard microwave and radio frequency applications. READ MORE
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2. Efficient and Wideband Power Amplifiers for Wireless Communications
Abstract : The rapid evolution of wireless communication systems and the developmentof new standards require that wireless transmitters process several types ofstandards across multiple bands. Power amplifiers (PAs) are key componentsin wireless transmitters because they have a big impact on the overall systemperformance in terms of their bandwidth, efficiency, and linearity. READ MORE
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3. Compact and Efficient Millimetre-Wave Circuits for Wideband Applications
Abstract : Radio systems, along with the ever increasing processing power provided by computer technology, have altered many aspects of our society over the last century. Various gadgets and integrated electronics are found everywhere nowadays; many of these were science-fiction only a few decades ago. READ MORE
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4. Wideband CMOS Data Converters for Linear and Efficient mmWave Transmitters
Abstract : With continuously increasing demands for wireless connectivity, higher carrier frequencies and wider bandwidths are explored. To overcome a limited transmit power at these higher carrier frequencies, multiple input multiple output (MIMO) systems, with a large number of transmitters and antennas, are used to direct the transmitted power towards the user. READ MORE
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5. Nonlinear Characterization of Wideband Microwave Devices and Dispersive Effects in GaN HEMTs
Abstract : Measurements play a key role in the development of microwave hardware as they allow engineers to test and verify the RF performance on a system, circuit, and component level. Since modern cellular standards employ complex modulation formats with wider signal bandwidths to cope with the growing demand of higher datarates, nonlinear characterization using wideband stimuli is becoming increasingly important. READ MORE