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 24 for “"PIN diode"”.
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Broadband pin diode switching and phase shifting
… into the limitations on the bandwidth of PIN diode switches in their different configurations is performed. The Single Pole Double Throw switch constructed with shunt mounted PIN diodes is shown to be bandlimited due to the line lengths involved in the operation. Series mounted diode …
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A nearly linear circuit model for the PIN diode.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1972. M.S.
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PIN diode switch circuit for short time high current pulse signal
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Karlsruhe Tritium Experiment: Detector System Commissioning and In-Situ PIN-Diode Array Dead-Layer Measurement
The <underline>Ka</underline>rlsruhe <underline>Tri</underline>tium <underline>N</underline>eutrino (KATRIN) experimental goal is to measure the neutrino mass to 0.2 eV sensitivity at the 90 percent confidence level. This is an order of magnitude more sensitive than the two most recent direct …
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High-speed silicon electro-optic modulator for electronic photonic integrated circuits
… structures are investigated: the forward-biased PiN diode with and without lifetime reduction, the reverse-biased PIN/PN diode and a metal-oxide-semiconductor (MOS) structure. These devices are compared with each other in terms of achievable performance. A modulator based on the forward-biased …
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Development of embedded modulated scatterer technique: single- and dual-loaded scatterers
… a probe, commonly a dipole antenna loaded with a PIN diode (also referred to as a single-loaded scatterer, or SLS), with an electromagnetic wave. This impinging wave induces a current along the scatterer length, which causes a scattered field to be reradiated. Modulating the PIN diode also …
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High-speed modulation of resonant CMOS photonic modulators in deep-submicron bulk-CMOS
… of controlling the amount of charge entering the PiN-diode structure of a photonic ring modulator are investigated to achieve high energy-efficiency in a constrained monolithic process. A digital modulator driver circuit is designed, simulated, fabricated and partially tested. This circuit uses a …
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Design of microstrip ultra wide band antenna with two notch filters for wireless communication
… the ON and OFF switching status of an ideal Pin diode. By using this simple switching technique, the current distribution of the patch changes and enables the antenna to have four modes of operation. The achieved results demonstrate that the antenna can function over the entire UWB working …
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Wideband reconfigurable antennas
… are demonstrated. Prototypes are presented with PIN diode switches, varactors, fixed capacitor or hard wire switches. Measured and simulated results with a very good agreement are presented, thus verifying the proposed concepts.
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Miniaturised and reconfigurable planar filters for ultra-wideband applications
… are investigated in this thesis: discrete (e.g. PIN diode, Optical switch) and continuous (e.g. varactor diode). Using the equivalent circuits and considering the direct coupled filter structure in most cases, several topologies with attractive features are developed for future communication …
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Development of switchable planar reflectors for beam shaping realization
… reconfigurable reflectarray antenna design. PIN diodes were incorporated with single and multiple slot embedded patch element configurations for the design of beam switchable planar reflectors. Moreover unit cells based on liquid crystal substrates were also designed for comparison between …
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On-chip single photon sources based on quantum dots in photonic crystal structures
… quantum-confined Stark effect in an electrical PIN diode. These results are the first demonstrations of in-plane single photon emission at optical wavelengths and mark an important cornerstone for the realisation of fully integrated quantum photonic circuits in optical quantum information …
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Vertical gallium nitride power devices on bulk native substrates
… voltage. This thesis studies vertical GaN power diodes and transistors grown on bulk GaN substrates. The first part of the thesis studies the PiN diode. Low p-GaN ohmic contact resistance is obtained through annealing in oxygen ambient. The breakdown voltage reaches 1200 V with optimized field …
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Design and Implementation of Reconfigurable and MIMO Antennas for Future Heterogeneous Wireless Systems
… of active electronic elements including varactor diode or PIN diode with extra circuitry. The main objective of this research is to design and investigate low-profile antennas for heterogeneous wireless systems using the antenna reconfigurability concept through tuning and/or using the MIMO …
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Broadband Approaches And Beam-Scanning Techniques For Reflectarray Antenna
… A 1-bit 10ã—10 reconfigurable reflectarray using pin diode was designed, fabricated and measured to explore the energy loss, and experimental results shothat 14% efficiency could be reached. In summary, some improved designs regarding bandwidth and scanning performance for reflectarrays are …
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Novel MOS-gated bipolar device concepts towards a new generation of power semiconductor devices.
… modulation, enhanced channel charge and the PIN diode effect are reported for the first time. A physically-based on-state analytical model for Trench Insulated Gate Bipolar Transistors (Trench IGBTs) is developed. Furthermore, the present study proposes a novel bipolar-MOS concept, termed …
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Electrically-Small Antenna Performance Enhancement for Near-Field Detuning Environments
… different antenna classes are investigated. A PIN diode, switch-tuned low-profile antenna prototype was also developed for the comparison which demonstrated excessive loss in the physical prototype. Lastly, a passive, low-profile multi-resonant antenna element with monopole radiation is …
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Real-Time Radiation Detection within the Gastrointestinal Tract
… this limitation by demonstrating the use of PIN diode-based ingestible electronics to monitor radiation as required throughout the gastrointestinal tract. The diode was first characterized in vitro for response to X-ray and gamma radiation while in temperature environments of 20°C to 40°C. …
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Design and modelling of beam steering antenna array for mobile and wireless applications using optimisation algorithms. Simulation and measrement of switch and phase shifter for beam steering antenna array by applying reactive loading and time modulated switching techniques, optimised using genetic algorithms and particle swarm methods.
… confirmed its viability. Then two hybrid coupled PIN diode phase shifters, using Branchline and Rat-Race ring coupler structures, were designed and tested. The generation of four distinct phase shifts was implemented and studied. The variations of the scattering parameters were found to be …
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Optical modulation of harmonics in PIN photodiodes for antenna applications
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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