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 47 for “"Multiplexers"”.
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Tunable compact microwave multiplexers based on substrate integrated waveguide
Microwave multiplexers and diplexers are widely used in communication systems. This thesis presents a compact low-profile hybrid-coupled filter module (HCFM) implemented using substrate integrated waveguide (SIW). Compared to conventional rectangular waveguide HCFM, the new design achieves 60% …
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On-Chip Multiplexers for Transferable Nanomaterials: Design, Fabrication and Applications
The development of scalable, on-chip multiplexing technology, capable of electrically characterising an array of nanomaterial field-effect transistors at cryogenic temperatures, is described. The channel in each transistor in the array is a nanomaterial which is transferred onto the multiplexer …
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Auslegung, Simulation und Fertigung eines elektrostatisch betriebenen, selbstjustierenden, optischen 1x2 Multiplexers
… elektrostatisch betriebenen Faserschalters (Multiplexers). Schwerpunkt der Arbeit ist die detaillierte Betrachtung der Kopplung zwischen optischer, elektrischer und mechanischer Domäne. Abgeschlossen wird die Arbeit durch die Charakterisierung des Multiplexers, die die analytischen Modelle …
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A new approach in the transient analysis of ATM multiplexers with bursty sources
In this dissertation, we propose a new approach for the queueing analysis of discrete-time queues with correlated arrivals, arising in the ATM environment. In the first part of this work, we focus on the discrete-time transient analysis of a single server ATM multiplexer, where the arrival process …
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Using multiplexers to study the statistics of quantum phenomenon in one-dimensional wires
The quantum point contact (QPC) is a one-dimensional constriction with the differential conductance quantised in units of $G_Q=2e^2/h$. However, the transport behaviour below the first plateau is still not fully understood, including the 0.7 anomaly and the 0.25 anomaly in the linear and non-linear …
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Crosstalk and Signal Integrity in Ring Resonator Based Optical Add/Drop Multiplexers for Wavelength-Division-Multiplexing Networks
… has focused on the crosstalk in Optical Add/Drop Multiplexers (OADMs) as an EMC problem. The main research question is: “How can signal integrity be improved and crosstalk effects mitigated in small-sized OADMs in order to enhance the optical EMC in all-optical networks and contribute to the …
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Dynamic scan chains : a novel architecture to lower the cost of VLSI test
… the IC design into several segments by a set of multiplexers. The multiplexers allow bypassing or including a particular segment during the test application on the automatic test equipment. The optimality criteria for partitioning scan chains into segments, as well as a partitioning algorithm …
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New Concepts in Front End Design for Receivers with Large, Multiband Tuning Ranges
… approach to antenna--receiver integration using multiplexers. This dissertation describes an improved use of multiplexers to integrate antennas to receivers. First, the notion of sensitivity--constrained design is considered. In this approach, the goal is first to achieve sensitivity which is …
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Dual channel bidirectional wavelength division multiplexing datalink
… detectors, filters and wavelength division ,multiplexers. Then, using the knowledge from the experimental data, we design a 20 km bidirectional WDM datalink. The design is backed up with theory and measurements. Fiber to the home is one of many applications that makes use of such a design.
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Super-high-frequency lithium niobate microelectromechanical system resonators
… fueled the development of wideband filters and multiplexers. To achieve the desired performance, the building blocks of these filters, namely the acoustic resonators, must feature resonances at SHF, and high figure of merit (FOM) for minimal insertion loss and enhanced out-of-band rejection. …
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Optical switching and its application in Sonet-based transmission systems
… optical memories and optical wavelength multiplexers and demultiplexers and optical wavelength shifters. The devices are based on a variety of operating principles and are implemented with a variety of technologies. The basic principles and technologies are described together with typical …
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Next-Generation Photonic Signal Processors
… and components, such as multimode adiabatic multiplexers with insertion loss down to 0.5 dB and crosstalk isolation up to 57 dB, multimode micro-ring resonator weights, and photodetectors with responsivity up to 1 A/W. We also realized inverse-designed mode multiplexers, reducing multiplexer …
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Effective modeling of advanced filters and multiplexing networks
Microwave filters and multiplexers are widely used in all types of electronic systems. This research focuses on advanced filters and multiplexers for applications in communication satellites with stringent requirements and specifications. Conventional modeling techniques are typically either based …
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Advancing acoustic filters for 5G front-ends: Lithium niobate piezoelectric MEMS resonators and filters
… acoustic or MEMS resonators, filters, and multiplexers, as they remain essential for accessing the crowded RF spectrum with low loss, high interference rejection, and small form factors. This dissertation reports on the design, fabrication, and demonstration of a new class of …
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ΠΡΟΓΝΩΣΗ ΣΕΙΣΜΩΝ ΜΕ ΤΗΝ ΤΕΧΝΙΚΗ ΤΗΣ ΑΚΟΥΣΤΙΚΗΣ ΕΚΠΟΜΠΗΣ
… CONDITIONING AMPLIFIERS, VHF FM TRANSMITTERS, MULTIPLEXERS/TIMERS AND SOLAR CELLS, HAVE BEEN INSTALLED AROUND THE TIP OF THE CORINTH GULF NEAR AN SEISMICALLY ACTIVE GEOLOGICAL FAULT, WHICH CONSTITUTES A PERFECT SEISMOLOGICAL LABORATORY. A CENTRAL RETRIEVING STATION AT THE UNIVERSITY OF PATRAS …
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Contribución al estudio y optimización de dispositivos basados en holografía dinámica para su uso en redes ópticas pasivas multiplexadas en longitud de onda Wdm-Pon
… components as transmitters, receivers, de/multiplexers, filters, etc. It is in this context where the use of holographic devices, WDM tunables, takes different applications as network elements like filters, demultiplexers, wavelength routers, add/drop optical multiplexers (OADMs) and …
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Charakterisierung und Entwicklung eines CIP-Auslese-ASIC für das H1-Upgrade-Projekt 2000
… ein Triggersignal, das mittels eines vierfachen Multiplexers auf 16 Kanälen ausgegeben wird. Es werden die Architektur des CIPix vorgestellt und die einzelnen Funktionselemente erläutert. Die durchgeführten Simulationen werden dargestellt sowie die Meßergebnisse präsentiert. ---- This thesis …
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Opto-VLSI based WDM multifunction device
… crucial components of DWDM networks – add/drop multiplexers, filters, gain equalizers as well as interconnects between optical channels – are currently not implemented as dynamically reconfigurable devices. Electronic cross-connects, the traditional solution to the reconfigurable optical …
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A low power and fast CMOS arithmetic logic unit
… designed using pass transistor logic (PTL) based multiplexers and 8 transistors (8T) full adder. Tanner EDA V13 with CMOS technology of 0.25μm is used to design and analyze the circuit. Less number of transistors used will result in small design space area thus reducing the power consumption. The …
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The Development of Quasi-Optical Techniques for Log Wavelength Imaging
… discrete and continuous phase modulating optical multiplexers (phase gratings) for use at 100 GHz. The use of GBMA for iterative phase retrieval was investigated for application to phase grating design. Several phase unwrapping techniques were also investigated in order to simplify manufacture of …
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