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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Study of nonlinear transmission lines and their applications

Payandehjoo, Kasra. January 2006 (has links)
With the increasing market demand for wideband multifunctional electronic systems, real-time broadband measurement systems with few picoseconds switching rates are essential. Furthermore, stable millimeter wave sources are required to drive these wideband electronic systems. Nonlinear transmission lines (NLTLs) are high impedance transmission lines periodically loaded with reverse biased diode serving as varactors. Extremely high bandwidths are achievable because of the possibility to fabricate these structures monolithically, which is why pulses with ultra short transitions can be generated using NLTLs. Also, efficient wideband frequency conversion is made possible by NLTL technology. / In this thesis, a comprehensive study of NLTLs and their applications is presented. Sharpening of the edges of electrical pulses, voltage dependent true time delay, and harmonic generation in NLTLs are investigated through analytical studies as well as circuit simulations and experimental measurements. Designing the best possible mixers, frequency doublers, and edge sharpeners and optimizing them are not the objects of this thesis. The main objective is to study an alternative design approach by using NLTLs. To this end, analytical solution for the magnitude of the third harmonic along a nonlinear transmission line is derived for the first time. Also, for the first time the lowpass nature of the NLTL is combined with the solutions for the magnitudes of harmonics in order to improve the validity range of the predicted harmonics. An NLTL harmonic generator is fabricated and measurement results are reported. / Inspired by the distributed nature of nonlinear transmission lines, a novel filtering method is introduced for the suppression of the unwanted signals in different NLTL applications. The filtering method is applied to a nonlinear transmission line frequency multiplier in order to filter the third harmonic. The distributed filtering is also used to suppress the image signal in an NLTL mixer. The proposed filtering method is general and can be applied to other periodic structure as well (such as distributed amplifiers and distributed mixers). For implementing the filtering, compact complementary split ring resonators are proposed and designed for an NLTL frequency doubler.
12

Quantization and routing in broadband networks

Al-Yatama, Anwar 08 1900 (has links)
No description available.
13

Feedback methods used by design professionals in the Greater Milwaukee Area in 1983

Carter, Vincent Gerald. January 1983 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 55-61).
14

User considerations in graphic design /

Corbo-Hudak, Neva. January 2005 (has links)
Thesis (M.F.A.)--Rochester Institute of Technology, 2005. / Typescript. Includes bibliographical references.
15

Study of nonlinear transmission lines and their applications

Payandehjoo, Kasra. January 2006 (has links)
No description available.
16

The preferences of practicing architects for the communication of environment behavior research information in design

Schmidt, Frederick James. January 1984 (has links)
Call number: LD2668 .T4 1984 S35 / Master of Architecture
17

Angle coverage in wireless sensor networks

Chow, Kit-yee, 周潔儀 January 2007 (has links)
published_or_final_version / abstract / Electrical and Electronic Engineering / Master / Master of Philosophy
18

Dynamic channel assignment for cellular mobile radio communication systems

Zheng, Zhihua., 鄭智華. January 2003 (has links)
published_or_final_version / Electrical and Electronic Engineering / Doctoral / Doctor of Philosophy
19

Design and analysis of survivable WDM mesh networks

Li, Ji, 李季 January 2007 (has links)
published_or_final_version / abstract / Electrical and Electronic Engineering / Doctoral / Doctor of Philosophy
20

Cross-layer design for OFDMA wireless system

Hui, Shui-wing, David., 許樹榮. January 2007 (has links)
published_or_final_version / abstract / Electrical and Electronic Engineering / Master / Master of Philosophy

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