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Showing result 1 - 5 of 37 swedish dissertations matching the above criteria.
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1. Reconfigurable Impedance Matching Networks for Radio Receivers
Abstract : Mobile phones become smaller but include more advanced functions for every new generation. This paradox is possible since reduced transistor size and increased integration of digital building blocks free space for new functions. READ MORE
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2. An impedance approach to passive-active vibration control
Abstract : The complementary advantages of active and passive vibration control have motivated research concerning hybrid configurations. Previous studies have mainly focused on active constrained layers (ACL). However, investigations pointing towards suboptimal performance of ACL have made it interesting to investigate other solutions. READ MORE
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3. Pulmonary ventilation and perfusion assessed by electrical impedance tomography - Experimental studies in pigs
Abstract : Pulmonary ventilation and perfusion and ventilation/perfusion (V/Q) matching determine gas exchange in every lung unit in the healthy state and in the pathologically altered lung. Mismatch of V and Q lead to hypoxaemia and hypercapnia and monitoring of V/Q relations are thus important in critical illness. READ MORE
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4. Wideband Active and Passive Antenna Solutions for Handheld Terminals
Abstract : This thesis presents solutions and studies related to the design of wideband antennas for wireless handheld terminal applications. A method of electrically shortening the terminal chassis length to obtain resonance at high frequencies has been proposed and evaluated, thereby increasing the antennas impedance bandwidth. READ MORE
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5. Embedded Element Patterns in Combination with Circuit Simulations for Multi-Port Antenna Analysis
Abstract : This thesis is a result from work on two different subjects, electromagnetic simulations of reverberation chambers and a methodology for the analysis of multi-port antennas. The subjects can be linked together by their contribution to knowledge in electromagnetic simulations and characterization of antennas. READ MORE