Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1677 for “"Microwave"”.
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Micromachined microwave filters
Microwave circuits in the millimetre wave region demand low loss, and low dispersion transmission lines. The work carried out in this thesis is on low loss transmission lines and filters, based on a square coaxial transmission line which is made only of metal, avoiding dielectric and radiation …
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Microwave mineral analysis
Abstract can not be copied from the PDF document
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Microwave CMOS Beamforming Transmitters
The increase of the consumer electronics market the last couple of decades has been one of the main drivers of IC process technology development. The majority of the ICs are used in digital applications, and for these CMOS is the choice of technology. The urge to squeeze more transistors on to a …
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Optimization of microwave devices
… techniques for the improvement of the microwave devices performance. In particular, the technique proposed considers the Particle Swarm Optimization algorithm and applies such an algorithm to different devices. Different techniques are developed to connect the optimization with an …
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Atomically thin microwave biosensors
This thesis described the development of a new type of biosensor based on the integration of atomically thin graphene in a broadband radio-frequency (RF) coplanar waveguide (CPW). To combine both electrochemical and dielectric sensing concepts, a graphene channel is inserted into the CPW, which can …
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Double resolution microwave holography
… of a simple technique for the recording of microwave holograms using common hardware components, which offers the possibility of significant improvements in image resolution. Practical experiment has determined that, under ideal conditions, the resolution performance of this system …
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Microwave spectroscopy of pentafluorosulfanylisocynate
The microwave spectrum of pentafluorosulfanylisocyanate, SF₅ -N = C = 0 has been investigated in the 8 GHz to 26 GHz region using a conventional Stark modulated spectrometer. Twenty six transitions have been assigned. A rigid rotor fit was performed by using low J transitions. The spectroscopic …
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MICROWAVE BACKGROUND GROUND-BASED OBSERVATIONS
… radio frequency telescope that sensitives at the microwave frequencies (43GHz and 95Ghz). It will be deployed at the Teide Observatory (Tenerife - Canary Islands) for observing the curly part of the polarization of the Cosmic Microwave Background - CMB. The angular correlation pattern of the curly …
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Microwave Properties of Helical Resonators
… resonances of helical structures at microwave frequencies through both modelling and experimentation, with a particular emphasis on the relatively unexplored higher-order modes. By systematically varying geometric parameters, especially pitch, this study reveals unique properties that …
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Enhanced Microwave Hyperthermia using Nanoparticles
… method in cancer treatment, and high frequency microwave radiation has been used successfully to raise the tumor temperature to around 42°C in superficial tumors without causing damage to surrounding healthy tissues. Magnetic fluid hyperthermia involves the use of magnetic nanoparticles …
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Microwave Response in Superconducting Nanowires
… study their transport properties when exposed to microwave radiation (MW), at cryogenic temperatures. Our wires have a diameter on the order of the zero temperature coherence length, which makes them quasi-one-dimensional at all temperatures below the superconducting critical temperature, T C. …
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Barrier Studies by Microwave Spectroscopy
Made available in DSpace on 2014-12-10T23:01:00Z (GMT). No. of bitstreams: 1 7114799.pdf: 2599480 bytes, checksum: 98c84e015b62864c12b505aeb63b399d (MD5) Previous issue date: 1970
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Microwave studies of amorphous silicon
… are independent or very nearly independent of microwave frequency and applied magnetic field. Conventional one and two phonon spin lattice relaxation mechanisms cannot account for the observed temperature dependences. A theory involving spin lattice relaxation by coupling to a distribution of …
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Rock differentiation using microwave irradiation
… on a rock by rock basis. Experimentation with a microwave oven indicated that samples of kimberlite were more attenuative than samples of gabbro. The possibility of using microwave heating for rock differentiation was investigated but was impractical to implement. A study of low power microwave …
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Ore sorting using microwave irradiation
… between gabbro and kimberlite. A technique using microwave irradiation attenuation was successful when using parallel-sided smooth-surfaced rocks. This technique used linearly polarized square antennas at 35GHz. Problems were experienced, however, with irregu1arly shaped rock s. The aim of the …
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