Search for dissertations about: "Varactors"
Showing result 1 - 5 of 28 swedish dissertations containing the word Varactors.
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1. Heterostructure barrier varactors
Abstract : .... READ MORE
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2. SiC Varactors for Dynamic Load Modulation of Microwave Power Amplifiers
Abstract : The rapid consumer adoption of mobile services is leading to an exponential growth in wireless data traffic. In order to accommodate more concurrent high data-rate users, the required complexity of transmitting radio base station (RBS) power amplifiers (PAs) is increasing. READ MORE
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3. High Efficiency Microwave Amplifiers and SiC Varactors Optimized for Dynamic Load Modulation
Abstract : The increasing use of mobile networks as the main source of internet connectivity is creating challenges in the infrastructure. Customer demand is a moving target and continuous hardware developments are necessary to supply higher data rates in an environmentally sustainable and cost effective way. READ MORE
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4. High Temperature Superconducting and Tunable Ferroelectric Microwave Devices
Abstract : This thesis addresses some applications of High Temperature Superconductors (HTS) and ferroelectric materials in tunable microwave devices and circuits. The work is divided into three main areas: i) modeling of multilayered structures including ferroelectric layers, ii) realization and characterization of tunable coplanar waveguides (CPW), capacitors and resonators based on ferroelectrics, and iii) an investigation of microstrip HTS K-band filters. READ MORE
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5. Millimetre wave waveguide enclosed grid frequency multipliers and imaging
Abstract : The utilisation of the THz spectrum ( 0.3-10 THz ) is hampered by fundamental difficulties in generating power at these frequencies. READ MORE