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.
Results
Showing 1 to 20 of 36 for “"Ultra-high frequency"”.
-
Drying ceramic products using induced ultra-high frequency electrical energy
… required to dry a test specimen by the use of ultra-high frequency induced current until shrinkage ceases is only thirty percent of the time required when heat is supplied by resistance wire heating coils. (b). It is possible, with the use of the ultrahigh frequency energy, to dry complicated …
-
A concept for wildlife tracking using ultra high frequency (UHF) radio
… animals. Normally, a radio tracking using a low frequency between 30MHz to 300MHz known as Very High Frequency (VHF). In this study, a band of Ultra High Frequency (UHF) with a frequency 315MHz is used as a transmitter. While a encoder HT12E is used as a function of generate a data signal to the …
-
Multi-dimensional ultra-high frequency passive radio frequency identification tag antenna designs
… evaluation of two novel multi-dimensional ultra-high frequency (UHF) passive radio frequency identification (RFID) tag antennas, the Albano-Dipole antenna and the Albano-Patch antenna, that provide omnidirectional communication capabilities. The performance of a passive UHF RFID tag is …
-
Ultra high frequency (UHF) radio-frequency identification (RFID) for robot perception and mobile manipulation
… of environmental augmentation in the form of Ultra High Frequency (UHF) Radio-Frequency Identification (RFID) tags. Previous research has demonstrated the utility of infrastructure tags (affixed to walls) for robot localization; in this thesis, we specifically focus on tagging objects. Owing …
-
QUBIT COUPLED MECHANICAL RESONATOR IN AN ELECTROMECHANICAL SYSTEM
… (CPW) cavity. The difficulty of achieving high quality of superconducting qubit in a high-quality voltage-biased cavity is overcome by integrating a superconducting reflective T-filter to the cavity. Further spectroscopic and pulsed measurements of the hybrid system demonstrate interactions …
-
Ordinal Logistic Regression Analysis of RFID Doorway Portal Performance as a Function of System Design Parameters
… examined the read rate differences in a passive ultra high frequency (UHF) Radio Frequency Identification (RFID) doorway portal as a function of antenna placement, doorway size and composition, reader manufacturer, tag type, and tag orientation. In this analysis of a RFID system, the response …
-
Non-foster matching of an RFID antenna
In this thesis, novel designs of radio-frequency identification (RFID) tag antennas with better matching characteristics to achieve extended range for passive tags have been investigated in the ultra-high frequency (UHF) band. A variety of cavitybacked/coupled microstrip dipole antennas in 915 MHz …
-
Enhancement of electromagnetic propagation through complex media for Radio Frequency Identification
… the fundamental limitations involved in Radio Frequency Identification (RFID) as well as provide a means to improve reader-tag communication in ultra high frequency RFID systems. The ultimate goal in an RFID system is to maximize the communication link between the reader and the tags while, at …
-
The Nocturnal Low-Level Jet in Tropical West Africa: Generation and Representation in Various Data Archives
… low-level jet is examined using radiosonde and ultra high frequency (UHF) wind profile data gathered during the African Monsoon Multidisciplinary Analysis (AMMA) field campaign in 2006. These data, as well as output from a Weather Research and Forecasting (WRF) simulation of the region, are used …
-
A Damped Double Dipole UHF RFID Antenna with Application to Wireless Chemiresistive Gas Sensing
Ultra High Frequency (UHF) Radio Frequency Identification (RFID) tags provide an inexpensive framework for distributed sensing. Materials such as functionalized carbon nanotubes (CNTs) have been engineered to change in resistance when exposed to a variety of analytes. These materials have been …
-
Optimum Performance of UHF RFID Tags in Dielectric Environment
Ultra High Frequency Radio Frequency Identification (UHF RFID) technology has gained prominence in recent years. It is being deployed extensively in supply chain and asset tracking by retailers to better control their inventory. The main drawback of UHF RFID tag antenna is that it is sensitive to …
-
HCI gesture tracking using wearable passive tags
… RFID sensor tags. This system was composed of an ultra-high frequency reader and small, passive, finger-worn tags powered by scavenged RFID energy equipped with a variety of sensors that could be used to detect gestures. The primary physical goals of the system were to be comfortable and wearable …
-
Radio spectrum utilization in Zambia: establishing availability of white space, as enablers for ICT services network rollouts
… TVWS refers to regions of radio spectrum in the Ultra High Frequency(UHF)bandthatarenotusedallthetimeinaspecificgeographicallocation.TVWS spectrum brings with advantageous propagation properties inherent to UHF spectrum and has been identified as an alternative for providing commercial wireless …
-
Radio spectrum utilization in Zambia: establishing availability of white space, as enablers for ICT services network rollouts
… TVWS refers to regions of radio spectrum in the Ultra High Frequency(UHF)bandthatarenotusedallthetimeinaspecificgeographicallocation.TVWS spectrum brings with advantageous propagation properties inherent to UHF spectrum and has been identified as an alternative for providing commercial wireless …
-
Antifouling and Antithrombogenic Ultrathin Surface Chemistry for Bioanalytical and Biomedical Applications
… - exploiting the transducing technology of the ultra-high frequency electromagnetic piezoelectric acoustic sensor (EMPAS) system - as potential clinical assay alternatives to current screening/diagnostic tests. Biosensing platforms featured dual-functional, binary organosilane surface chemistry …
-
The excitation of UHF signals by partial discharge in gas insulated substations
This work is an investigation of the ultra-high frequency (UHF) signals excited by partial discharge (PD) sources inside gas insulated substations (GIS). PD is indicative of defects in the insulation system and by using couplers mounted at intervals along the GIS, the corresponding bursts of UHF …
-
Design, Simulation and Analysis of A Low Radar Cross Section Uhf Circular Microstrip Patch Antenna and Radome For United States Naval Fleet Broadcast Applications
… aboard U.S. Naval and Allied vessels. This new Ultra High Frequency antenna draws upon recent research results in various areas pertaining to microstrip patch antenna arrays, such as, parasitic coupling, gap coupling, utilization of stacked patches, utilization of layers of dielectrically …
-
On the profitability of technical trading
… Motivated by this, a very large sample of ultra high-frequency data is used to investigate intraday momentum and reversal effects. As well as being an important contribution to research in this field, the results are, once again, of relevance to practitioners. The need for further research …
-
Three Essays on Machine Learning in Empirical Finance
… increase in the synchronicity of intra-day, ultra-high frequency stock returns over the last decade. This surge in the intra-day synchronicity across stocks coincided with the advent of electronic, automated trading in U.S. markets. Using changes to the S&P500 index, we establish evidence of …
-
DISTRIBUTED PHASED ARRAY ANTENNAS IN WIDE AREA RFID
Ultra High Frequency (UHF) Radio Frequency Identification (RFID) has gained importance over the past two decades in many applications such as stock management, asset tracking and access control. For wide area applications, Distributed Antenna Systems (DAS) have been used to obtain good coverage …
Page 1 of 2