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 50 for “"S-band"”.
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S band narrow-wall slotted waveguide antenna For high-power applications
… longitudinal-aperture antenna arrays for S band high power applications. This antenna is designed to perform as a uniform array with minimum power reflected into the feed-waveguide. Based on the configuration, the double-narrow-wall-slot-array design is proposed for higher gain and grating …
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ISM S-band CubeSat Radio Designed for the PolySat System Board
… Industrial, Scientific, and Medical (ISM) radio band.</p> <p>Estimating a link budget for a realistic CubeSat leads to the conclusion that this system will require a large deployable CubeSat antenna, large earth station satellite dish, and a fine-pointing attitude control system. Noise floor …
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X-band ENDOR and S-band ESEEM of paramagnetic disordered solids
X-band ENDOR and S-band ESEEM have been employed in this study to measure weak electron-nuclear hyperfine and nuclear electric quadrupole couplings in paramagnetic disordered solids. In the X-band ENDOR investigation, radicals generated from perylene adsorbed on catalytically active alumina and …
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Raindrop Size Distribution Retrieval And Evaluation Using An S-band Radar Profiler
… with the corresponding measurements from an S-band radar profiler during a NASA conducted Tropical Rainfall Measuring Mission (TRMM) field experiment in Central Florida in 1998. Also, the results of my analysis yielding precipitation retrievals are validated with an independent, simultaneous …
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S-band electron spin echo and multifrequency EPR investigations of disordered solids
Electron spin echo (ESE) methods are particularly useful for measuring weak electron-nuclear couplings in paramagnetic solids. Frequencies that correspond to nuclear transitions are manifested in the electron spin echo envelope modulation (ESEEM) patterns recorded from a sample. Information …
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Fusion of observations from C-band polarimetric radar and S-band profiler radar during a convective storm
… by utilizing simultaneous observations from a C-Band dual-polarization scanning radar and a vertically pointing S-Band profiler radar. The C-Band radar, used in this study, is known as the Atmospheric Radar for Meteorological and Operational Research (ARMOR) radar, situated in Huntsville, …
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Multilayer Micromachined RF MEMS Filters at Ka and L/S Band For On-Board Satellite Communication Systems
… for the realization of Radio Frequency (RF) bandpass filters. The work has been inspired and supported by the European Space Agency (ESA) Contract No. 22706/09/NL/GLC of the ARTES 5 Workplan 2008 “Micro-machined Filters in Multi-layer Technology for Satellite On-board Communication …
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Cross validation of observations from the GPM dual-frequency precipitation radar and dual-polarization S-band ground radars
… (GPM) Mission Satellite with dual polarization S-Band Ground Radars. The GPM mission is a joint venture by the NASA and the JAXA. The radar on board the core observatory is a dual-frequency precipitation radar (DPR) capable of simultaneously operating at 13.6 GHz (Ku band) and 35.5 GHz (Ka band). …
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Search and characterization of pulsars in southern globular clusters: new methodologies and results from an S-band survey
… Chapter~4 describes the first MeerKAT S-band globular cluster survey, including its observational strategy and data analysis. Chapter~5 introduces a GPU-based time-domain search method designed to improve sensitivity to systems affected by complex orbital motion. Appendices provide …
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Rain attenuation and depolarization along 10 to 30 GHz earth space links predicted from s-band dual-polarized radar measurements
This thesis presents the computer model FORWP that is capable of predicting attenuation and cross polarization at 10-30 GHz from dual-polarization radar data with a high degree of accuracy. FORWP uses a rigorous backscattering computer model BSCAT to infer rain drop size distribution along the …
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Multifrequency Electron Paramagnetic Resonance Spectroscopy of Group Viib Carbonyl Radicals
… = cyclohexyl) were performed at conventional X-band ((DBLTURN) 9 GHz), S-band ((DBLTURN) 3 GHz) and L-band ((DBLTURN) 1 GHz) frequencies. Computer simulations of the X- and S-band frozen solution spectra as well as room temperature X-band solution spectra were obtained. Anisotropic g-shifts, …
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Radio Wave Propagation Measurements and Modeling for Land Mobile Satellite Systems
… Audio Radio Satellite systems operating at S-band frequencies. The performance of the simulator for S-band frequencies was evaluated through a measurement campaign conducted with the XM Radio signals at 2.33 GHz in various propagation environments. Finally, additional results on dual satellite …
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The Design of an Anti-Aliasing Filter for the Next Generation Digitiser
… signals produced by celestial sources at UHF-Band, L-Band, S-Band and X-Band frequencies. The first phase of the construction included the design, development and integration of the UHF-Band, L-Band and S-band Receivers, whilst the X-band design has been superseded by the incorporation of the …
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Spectroscopy of thulium doped silica glass
The increasing demand for bandwidth in optical fibre communication systems has prompted a significant research effort into developing efficient fibre based optical amplifiers at operating wavelengths neighbouring the erbium-doped fibre amplifier. Of the possible candidates, thulium-doped fibre …
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LPI Air Defence Noise Radar
… research is approached by first simulating an S-Band LPI Noise Radar detecting a flying target and determining its range and velocity. The simulated Noise Radar is then implemented in the Universal Software Radio Peripheral (USRP) B210 H/W and tested against flying targets in monostatic mode. The …
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A multiple polarization plane ZDR radar data acquisition system
This thesis discusses the development of an S-band radar used to measure differential reflectivity in multiple polarization planes. The radar uses a novel polarization switch which allows reflectivity measurements in any linear polarization. A dedicated microcomputer and a digital hardware system …
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Radio frequency direct-digital QPSK modulators in CMOS technology
… is demonstrated through the design of an L-band modulator followed by an enhanced tunable S-band version. The proposed L-band modulator first generates all four quadrature phases of the carrier by using a 90° resistor-capacitor, capacitor-resistor (RC-CR) phase shifter followed by two 180° …
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Polarization diverse tracking antenna with high sensitivity
The design of an S-band aperture coupled microstrip antenna array for use on airborne telemetry platforms is presented. The High Sensitivity Diverse Tracking Antenna (HSDTA) is capable of receiving both left and right hand circular polarizations and has RF auto-tracking capability. Novel placement …
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