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Empirical characterization of a plated-through-hole interconnect for a multilayer stripline assembly at microwave frequenciesHopkins, Glenn Daniel 05 1900 (has links)
No description available.
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Full wave analysis of transmission lines above a perforated ground plane /Jiang, Li, January 2005 (has links)
Thesis (Ph. D.)--Lehigh University, 2006. / Includes vita. Includes bibliographical references (leaves 115-127).
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Field theory analysis and design of circular waveguide componentsBalaji, Uma 31 July 2018 (has links)
RF/microwave terrestrial point-to-point and satellite communication systems employ
a large number of waveguide components operating at microwave and millimeter
wave frequencies. Accurate design of these components for optimum performance
of the overall system is critical. To achieve this, computationally efficient and accurate numerical methods are indispensable tools in the design and optimization of
components and subsystems.
Among the large variety of potentially suitable numerical methods, the mode
matching method in conjunction with the generalized scattering matrix technique
has been found to be one of the most reliable and straightforward techniques to
design waveguide components. In the past the method has been mainly applied to
eigenvalue and scattering problems in rectangular waveguides. In this thesis, the mode
matching method is extended to ridge waveguide problems in circular waveguides and
thus closes a gap in the literature that has existed for a long time.
The thesis begins with a study of the basic principles of the mode matching method
as it is known from rectangular waveguides. These principles are then applied to the
analysis of the rectangular ridged and coaxial waveguide, followed by an eigenvalue
analysis of ridged circular waveguide. Rather than rectangular ridges, ridges of uniform
angular thickness (conically shaped) are used in the circular waveguide to avoid
a mixed coordinate system which would render the mode matching method computationally very inefficient. On the other hand, conically shaped ridges are as easy to
fabricate as rectangular ridges and are not detrimental to the electrical performance
of the component.
The thesis then continues to treat the discontinuity problem at the interface between the empty circular waveguide and ridged circular waveguide. To verify the
computed scattering parameters, measurements were performed and good agreement
was found. By cascading several discontinuities transformers and evanescent mode
filters were designed. A fifth order filter was designed and fabricated and also here
good agreement between measured and computed data was found.
The final chapter in the thesis analyses the coupling between orthogonal modes in
the presence of an asymmetric discontinuity. Determining the coupling factor between
orthogonal modes is an integral part of the design of polarizers and dual mode filters
and for conically shaped ridges, has not been published in the open literature yet.
To realize various coupling coefficients, a single or double ridges must be placed at
an arbitrary angle to the exciting wave. The mode matching method is extended to
include also this case and various convergence tests have been performed to validate
the algorithm . As a final example, the algorithm has been applied to design a circular
polarizer with two ridges.
Although only two-port problems are treated in this thesis, the basic framework
for the mode matching method in circular waveguide has been established and can
now be extended to three-port problems. This will be the subject of future work to
analyze and design power dividers and orthomode transducers. / Graduate
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Analysis and applications of multiple coupled line structures in an inhomogeneous mediumChin, Youn Kang 21 May 1982 (has links)
The general expressions for finding the network functions, e.g.,
the immittance and the scattering parameters, of a general, uniformly
coupled n-line structure in an inhomogeneous medium are derived in
terms of the normal mode parameters of the system. These are used to
compute or to derive the explicit expressions for the elements of the
immittance matrix in terms of normal mode parameters.
The scattering parameters of a general non-symmetrical directional
coupler with arbitrary terminations are derived in terms of the
known scattering parameters with a specified set of terminations such
as characteristic non-mode converting terminations. The formulation
is quite general and can be applied to various coupled guided wave
systems, including coupled microstrip lines, slot lines, comb lines,
dielectric waveguides and various other uniformly coupled transmission
systems.
The results obtained are used to present the procedure to determine
the optimum terminations for directional couplers and sensitivity
of various multiports, including couplers, to changes in terminations.
It is shown that the coupler performance can be optimized in
terms of the terminating impedances.
The analysis and design procedure for both symmetrical and nonsymmetrical
four-port coupled structures consisting of the symmetrical
three lines in an inhomogeneous medium such as microstrips are presented.
Tables and charts for the design of three-line structure are
based on the closed form expressions for the immittance parameters.
The analysis and design procedure for open-circuited interdigital
multiple coupled microstrip line structures for applications as wideband
DC blocks and filters are also presented. As in the case of the
other microstrip structures, the initial design is based on the TEM
assumption and the final geometry is then determined by the exact computation
of the frequency response of the two ports. For larger numbers
of lines, the design is based on the equivalent even- and odd-mode
parameters of the n-line system. For this case, the TEM design
equations, derived in terms of even- and odd-mode impedances of a
pair of lines, can be translated into a physical configuration by
using published results on coupled lines. / Graduation date: 1983
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A novel compact microstrip type composite right/left handed transmission line (CRLH TL) and its applications /Wong, Man Fai. January 2009 (has links) (PDF)
Thesis (M.Phil.)--City University of Hong Kong, 2009. / "Submitted to Department of Electronic Engineering in partial fulfillment of the requirements for the degree of Master of Philosophy." Includes bibliographical references.
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Modeling of nonlinear active and passive devices in three-dimensional TLM networksCascio, Lucia 07 June 2017 (has links)
The increase in clock rate and integration density in modem IC technology leads to
complex interactions among different parts of the circuit. These interactions are poorly
represented with traditional lumped circuit design methodologies. Traditional CAD tools,
such as SPICE, provide very accurate models for a large variety of active devices, but
their description of the passive part of the circuit is progressively becoming insuffcient,
as the frequencies of the signals increase. Problems such as dispersion, crosstalk and
package effects require a full electromagnetic approach in order to predict their impact
on the final response of the circuit. On the other hand, the application of a full-wave
numerical method for the analysis of a complete device containing nonlinear elements is
not sustainable with the present computer capabilities. The spatial and time discretization
steps required to accurately model the nonlinear part of the device are much smaller than
those necessary to describe the distributed part of the circuit.
In the present thesis, the possibility of modeling nonlinear devices with the three-dimensional
TLM method has been explored; a new procedure has been successfully
developed and implemented, linking the equivalent circuit representation of the nonlinear
device to the transmission line model of the electromagnetic fields in the TLM network.
No restrictions are applied on the size of the device, which can thus occupy more
than a TLM cell. In order to model devices embedded in heterogenous media, a modification
of the TLM node and relative scattering matrix has also been proposed. In view of
linking the TLM field solver with a lumped element circuit CAD tool, the modified TLM
scattering algorithm has remained independent of the specific device connected to the
mesh.
The general methodology shown in this thesis appears to be a promising approach
to solve a large variety of electromagnetic problems containing nonlinear elements. / Graduate
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Analysis of microstrip-slotline transitions using the method of finite-difference in time-domain.January 1994 (has links)
by Terry Kin-chung Lo. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1994. / Includes bibliographical references (leaf 128). / Dedication --- p.i / Acknowledgements --- p.ii / Chapter Chapter 1 --- Introduction / Chapter 1.1 --- Outline of Thesis --- p.1 / Chapter 1.2 --- Microstrip to Slotline Transition --- p.3 / Chapter 1.3 --- Finite Difference as a Numerical Method --- p.4 / Chapter Chapter 2 --- The Method of Finite Difference in Time Domain / Chapter 2.1 --- An Introduction and Brief History --- p.1 / Chapter 2.2 --- The Methodology of FDTD --- p.11 / Chapter 2.3 --- The Yee's Algorithm --- p.13 / Chapter 2.4 --- Stability Criterion --- p.19 / Chapter 2.5 --- Interfaces Between Media --- p.21 / Chapter 2.6 --- Lattice Truncation Condition --- p.24 / Chapter 2.7 --- Error Analysis --- p.28 / Chapter 2.8 --- Implementation of Programs --- p.33 / Chapter 2.9 --- Summary --- p.35 / Chapter Chapter 3 --- Absorbing Boundary Conditions / Chapter 3.1 --- Introduction --- p.39 / Chapter 3.2 --- Mur's ABC --- p.40 / Chapter 3.3 --- Liao's ABC --- p.42 / Chapter 3.4 --- Dispersive ABC --- p.45 / Chapter 3.5 --- Comparison between Mur's ABC & Liao's ABC --- p.47 / Chapter 3.6 --- "Comparison among Mur's 1st Order ABC, Liao's ABC & DBC" --- p.51 / Chapter 3.7 --- Summary --- p.55 / Chapter Chapter 4 --- Microstrip-Slotline Transitions / Chapter 4.1 --- Introduction --- p.57 / Chapter 4.2 --- Approach --- p.59 / Chapter 4.3 --- Single Quarter-Wave Microstrip-Slotline Transitions --- p.67 / Chapter 4.4 --- Single Y-Strip-Slotline Transitions --- p.78 / Chapter 4.5 --- Shorted-Stub Y-Strip-Slotline Transitions --- p.88 / Chapter 4.6 --- Y-Strip-180°-Slotline Transitions --- p.96 / Chapter 4.7 --- Y-Strip-Y-Slot Transitions --- p.104 / Chapter 4.8 --- Y-Strip-Open-Stub-Y-Slot Transitions --- p.112 / Chapter 4.9 --- YY-Transitions --- p.120 / Chapter 4.10 --- Summary --- p.127 / Chapter Chapter 5 --- Conclusions & Future Development / Chapter 5.1 --- Conclusions --- p.129 / Chapter 5.2 --- Future Development --- p.131 / Appendix / Fortran 77 Code of Single Quarter-Wave Microstrip-Slotline Transition --- p.132
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Printed microwave systemsJanuary 1954 (has links)
Martin Schetzen. / "September 30, 1954." "This report is based on a thesis submitted ... for the degree of Master of Science, Department of Electrical Engineering, M.I.T., 1954. / Bibliography: p. 20. / Army Signal Corps Contract DA36-039 sc-42607 Project 132B Dept. of the Army Project 3-99-12-022
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Elementary theory of transmission and reflection : fundamental relations and geometryJanuary 1946 (has links)
by R.M. Redheffer. / Bibliography: p. 20. / Army Signal Corps Contract no. W-36-039 sc-32037.
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Coplanar waveguide components and their applications in microwave circuits /Mo, Tingting. January 2006 (has links) (PDF)
Thesis (Ph.D.)--City University of Hong Kong, 2006. / "Submitted to Department of Electronic Engineering in partial fulfillment of the requirements for the degree of Doctor of Philosophy" Includes bibliographical references.
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