Search for dissertations about: "Antenna application"
Showing result 1 - 5 of 75 swedish dissertations containing the words Antenna application.
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1. Systematic Antenna Design Using the Theory of Characteristic Modes
Abstract : The day Faraday moved a magnet in and out of a wire loop and detected the time-varying magnetic field, the first wireless transmitter / receiver system was created and the world was changed forever. However, it took almost fifty years for Heinrich Hertz to use Maxwell's equations and Faraday's insights in his professorship at Karlsruhe to create the first electromagnetic wireless communication system using a spark gap dipole transmitter and a loop antenna-based receiver. READ MORE
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2. Antenna-based passive UHF RFID sensor tags : Design and application
Abstract : RFID, as a low cost technology with a long life time, provides great potential for transmitting sensor data in combination with the ordinary ID number. The sensor can, for example, be integrated either in the chip or in the antenna of an RFID tag. READ MORE
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3. Integral Identities for Passive Systems and Spherical Waves in Scattering and Antenna Problems
Abstract : Sum rules and physical limitations within electromagnetic theory and antenna theory have received significant attention in the last few years. However, the derivations are often relying on application specific and sometimes unsupported assumptions, and therefore a mathematically rigorous and generally applicable approach seems timely. READ MORE
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4. Antenna Limitations and Q-factor Trade-off between Parameters, Steps towards Optimal Antenna Design
Abstract : Sub-wavelength antennas have become ubiquitous in essential devices, such as mobile phones, sensors, Internet of things (IoT) and machine to machine (M2M) communication devices. Such antennas are often embedded as a small part of the device chassis or their circuit-boards. READ MORE
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5. Weighted Regression with Application to Array Antennas
Abstract : A nonlinear system can be modelled with a simple linear model ifthe model is only valid locally. This can be done by assigningweights to the estimation data, as a function of the distance tothe modelled point. The weighting is here used to develop adirection-dependent calibration method for array antennas. READ MORE