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 82 for “"Wireless applications"”.
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Novel Antenna Beamsteering for Wireless Applications
… capable of electronic beamsteering1 for various wireless applications. Such antennas aim to change the direction of their radiation patterns and directivities, electronically and dynamically, in a fast and efficient manner without the need of mechanical aid.<br/>In particular, Metamaterials (MM) …
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Ultra-Low-Power Vision Systems for Wireless Applications
… offer large opportunities for ultra-low power applications, introducing novel visual computation paradigms, aimed at closing the large gap between vision technology and energy-autonomous sensory systems. Energy-aware vision could offer new opportunities to all those applications, such as …
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Massively Parallel Hidden Markov Models for Wireless Applications
Cognitive radio is a growing field in communications which allows a radio to automatically configure its transmission or reception properties in order to reduce interference, provide better quality of service, or allow for more users in a given spectrum. Such processes require several complex …
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Reconfigurable Wideband Circularly Polarized Microstrip Patch Antenna for Wireless Applications
… agility with wideband performance, for wireless applications are presented. First, a new technique to achieve circularly polarized (CP) probe feed single-layer microstrip patch antenna with wideband characteristics is proposed. The antenna is a modified form of the popular E-shaped …
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Development of Integrated "Chip-Scale" Active Antennas for Wireless Applications
With the rapid expansion of wireless communication services, ultra-miniature, low cost RF microsystems operating at higher carrier frequencies (e.g. 5-6 GHz) are in demand for various applications. Such applications include networked wireless sensor nodes and wireless local area data networks …
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A Linear and Efficient RF Amplifier Architecture for Modern Wireless Applications
When composing signal components from a complex baseband input signal in the digital domain, the spectral bandwidth of signal components is ultimately determined by the sample rate and the bandwidth of reconstruction filters. This finite bandwidth, together with a finite sample rate, introduces a …
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Circuit design and technological limitations of silicon RFICs for wireless applications
… technologies have been a key to the growth in wireless communication over the past decade, bringing added convenience and accessibility through advantages in cost, size, and power dissipation. A better understanding of how an IC technology affects critical RF signal chain components will …
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A low phase noise ring oscillator phase-locked loop for wireless applications
This thesis describes the circuit level design of a 900MHz [Sigma][Detta] ring oscillator based phase-locked loop using 0.35[mu]m technology. Multiple phase noise theories are considered giving insight into low phase-noise voltage controlled oscillator design. The circuit utilizes a fully symmetric …
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An implementation of a 5.25 GHz transceiver for high data rate wireless applications
… of high data rate information across wireless channels has grown immensely over the past decade. Wireless devices available today including mobile phones, wireless local area networks (WLANs) and Bluetooth radios have realized a wide variety of applications at data rates ranging from …
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A Numerical and Experimental Investigation of Planar Inverted-F Antennas for Wireless Applications
… inverted-F antennas have been used for handheld wireless devices because these antennas have low-profile geometry and can be embedded into the devices. New wireless applications requiring operation in more than one frequency band are emerging. Dual-band and tri-band phones have gained popularity …
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High Efficiency Analog and Digital Circuits for Wireless Applications Based on III-V HEMTs
L'abstract è presente nell'allegato / the abstract is in the attachment
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The impact of technology scaling on integrated analogue CMOS RF front-ends for wireless applications
… integrated circuit design. Two LNAs in a wireless communication application serve as an application example for the investigation. Two LNAs have been implemented in a contemporary 65nm standard CMOS process technology for usage in a low-cost low-power mobile 2.5G GSM receiver front-end. …
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Analysis and design of reconfigurable multi-band stacked microstrip patch antennas (MSAs) for wireless applications
… Antennas (MSAs) received great attention in wireless communication systems due to their capability to vary their operating frequency, pattern and polarization. Reconfigurability enables us to accommodate more than one service using the same antenna. This thesis presents the analysis and …
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Mixed-domain simulation and hybrid wafer-level packaging of RF-MEMS devices for wireless applications
In questa tesi verranno trattati sia il problema della creazione di un ambiente di simulazione a domini fisici misti per dispositivi RF-MEMS, che la definizione di un processo di fabbricazione ad-hoc per il packaging e l’integrazione degli stessi. Riguardo al primo argomento, sarà mostrato nel …
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A continuous-time multi-stage noise-shaping delta-sigma modulator for next generation wireless applications
… ([delta][sigma]) modulator for modern wireless communication applications is investigated in this thesis. Quantization noise is suppressed aggressively by increasing the effective order of the noise transfer function (NTF). In order to increase the effective order of the NTF, a 2-loop …
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Digital ADCs and ultra-wideband RF circuits for energy constrained wireless applications by Denis Clarke Daly.
… low power devices like cellular phones and wireless sensors. Most recently, as transistor device geometries reach the nanometer scale, transistor characteristics have changed so dramatically that many traditional circuits and architectures are no longer optimal and/or feasible. As a …
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Design and Analysis of a Low-Power Low-Voltage Quadrature LO Generation Circuit for Wireless Applications
The competitive market of wireless communication devices demands low power and low cost RF solutions. A quadrature local oscillator (LO) is an essential building block for most transceivers. As the CMOS technology scales deeper into the nanometer regime, design of a low-power low-voltage quadrature …
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