Electrical and Computer Engineering Commons^™

Design Of Crystal Filters, Charles E. Schmidt

Electrical and Computer Engineering ETDs

This thesis concerns the application of electromechanical impedance elements to electric wave filters, so it is appropriate to begin with some discussion of such elements. The most important type is the piezoelectric resonator, most commonly made quartz.

Practical Analysis Of Blocking Oscillators, Richard D. Griffith

Electrical and Computer Engineering ETDs

The objective is to give a method of treatment of blocking oscillator circuits which will be of practical value for circuit design. An attempt has been made to reach a good compromise between accuracy, generality, and usefulness. The use of statistical methods to complement the mathematical analyses is stressed.

A Study Of Drift Mobility In Neutron Irradiated N-Type Germanium, William H. Closser

Electrical and Computer Engineering ETDs

With the advent of the transistor in the late 1940's have come an entirely new field of engineering and a greatly renewed interest in solid state physics. This paper will be concerned in general with the electrical properties of these materials, and specifically drift mobility of the minority carriers in n-type germanium. The minority carrier in n-type material is the hole. The definition of drift mobility is: the mean carrier velocity per unit electric field.

The Fields Of Electric Dipoles In Sea Water- The Earth-Air-Ionosphere Problem, Wallace L. Anderson

Electrical and Computer Engineering ETDs

In the initial part of the following investigation; expressions will be obtained for the Hertz potential in three regions of arbitrary conductive and dielectric properties. The regions are separated from each other by two infinite parallel planes. In directions normal to these planes, the regions above and below the intermediate layer are considered to be of semi-infinite extent. The regions are individually homogeneous. An electric dipole is located in one of the semi-infinite media, which will be called medium 1. The intermediate layer is called medium 2, and the other medium 3.

Acceleration Of A Symmetric Plasmoid In An Axial Magnetic Bias Field, Richard Daniel Jones

Electrical and Computer Engineering ETDs

A pulsed gas, electrodeless discharge, plasma accelerator facility has been developed for experimental studies of the coupling mechanism for the transfer of energy from a driving magnetic field to a plasma. Gas at low pressure is ionized by an azimuthal electrical field induced through the action of a rapidly varying axial magnetic field produced by the flow of current through a ring surrounding a confining glass shock tube. The tube is arranged to permit radial expansion of the ionized gas. Due to its conductivity, the plasma, once it is formed, can exclude the rapidly varying driving magnetic field for a …

A Radar Refraction Correction For Symmetric And Nonsymmetric Tropospheric Index Distributions, Ralph J. Rainey Jr.

Electrical and Computer Engineering ETDs

The high precision radars now in use have demonstrated the need for more exact refraction correction than is afforded by any fixed "standard" refractive index profile. The precision capabilities are even substantial enough to cause concern over the possible effects of the non-symmetric index distribution which introduces azimuthal errors. However, the indications are that the present limitation on true range measurements are primarily due to limitations on the radar itself, and a "gross" average correction is adequate for many cases of interest.

A Development Of An Equivalent Circuit Of A Hall Generator Which Utilizes A Flux Concentrator, Laurence L. Rosier

Electrical and Computer Engineering ETDs

The development of the transistor has brought about a great deal of research in the field of semiconductors. One of the results in this research is the development of the Hall effect. A number of new devices which utilize the Hall effect have been proposed; however, more theoretical and experimental work is required to determine which of these devices are practical. The success of the equivalent circuit approach in the other fields of electrical engineering suggests that an equivalent circuit which would represent Hall effect devices would be useful. The development of such an equivalent circuit should be centered about …

Design Of A Square Loop Magnetic Integrating Device, Fred Leland Grismore Jr.

Masters Theses

"The problem investigated in this research was the development of a static integrating circuit applicable to closed loop feedback control systems. Investigation of various methods of attack indicated that square loop magnetic cores offered characteristics required for the integration process. These include the ability to sum input information and the ability to store information for an indefinite period of time.

An experimental program was carried out, investigating the various properties of square loop magnetic materials and required design parameters. Through this work it was verified that the process of integration could be realized by using the partial switching volt-second absorption …

Scatter Matrix Analysis Of Plane Waves In A Layered Media, Bill W. Ashworth

Masters Theses

"The problem was the application of matrix theory to the solution of the reflection and transmission coefficients for a plane wave incident on a layered media. Background material relating to the problem was reviewed. Equations that were used in the solution of the problem were either derived or explained. The derivations for the reflection and transmission coefficients were carried out in order, starting with the simple case of normal incidence on a junction of two infinite media and progressing through the more difficult case of oblique incidence on a layer of finite thickness separating two infinite media. Scatter matrix analysis …

A Study Of Viscous Frictional Effects And Relay Characteristics On The Operation Of A Positional Relay Servomechanism, Earl F. Richards

Masters Theses

"The thesis describes some experimentally observed data and analytical approaches to the study of a relay servomechanism. The experimental data were secured from an analog simulation of a relay servo system. The results of this data were compared to the transient approach by use of the phase-plane method. The stability of the system was determined using a describing-function. The analytical approaches are described in the presentation.

A study of the effects of viscous friction is described, and the characteristic of the relay used in the system is given special attention. The response to input driving function was considered, and rise …

Pulse Height Digitizer For Fast Random Pulses, Andrew E. Pope

Electrical and Computer Engineering ETDs

The purpose of this project was to develop airborne electronic equipment which would digitize the amplitude of random, fast, video pulses to an accuracy greater than one percent. For a detailed description of this task, refer to Appendix A, Research Contract Proposal 56-13AEE, “Development of an Anglo-To-Digital Converter.” This report covers the complete system design and the development of several basic circuits, in their practical form, which demonstrate system design feasibility.

Demodulation Of A Special Am-Fm Signal, Donald W. Dearholt

Electrical and Computer Engineering ETDs

As telemetry becomes more and more important in returning information, new types of modulation arise. Sometimes the modulation used is a direct result of a particular type of transducer, although the output of the transducer may be modified before the carrier is modulated to cause a very different type of signal than would otherwise have occurred.

A Study Of Minimum Element Syntheis Of A Two-Pole Rc Driving Point Impedance, William F. Carlson

Electrical and Computer Engineering ETDs

The point of view taken in this thesis is from the point of view of economy. A network containing resistors of values 1 ohm and 1 megohm may present problems of accuracy and element tolerance limits which are not aided by the fact that all elements may be increased or decreased by a constant multiplier without changing the shape of the network gain curve.

A Microwave Technique For Determining The Electronic Properties Of A Moving Plasma, Bernard Hayes

Electrical and Computer Engineering ETDs

A microwave interferometer technique which may be used as a diagnostic tool for determining the electronic properties of a moving plasma is described and analyzed. The plasma and microwaves are confined in a wave guide and longitudinal observation is employed. The complex reflection coefficient determined from resultant standing-wave pattern provides the means for obtaining the complex dielectric constant, conductivity, electron concentration and collision frequency of electrons with molecules in the plasma. The plasma used for these experiments is the reaction products of a gas detonation.

Functional And Economic Considerations Of An Electrical Line Feeding Large Concentration Loads, Seth O. Lewis

Electrical and Computer Engineering ETDs

This paper discusses the considerations required for selecting particular characteristics of [transmission lines] and presents an original method of obtaining the most economical solution. A typical problem at the Public Service Company of New Mexico is solved to illustrate the usefulness of this method.

Design And Use Of A High Power Laser For Plasma Generation Studies., Philip N. Mace

Electrical and Computer Engineering ETDs

The advent of high power lasers to the technological scene has introduced the possibility of creating new effects utilizing the interaction of this high intensity light with matter. C. M. Fowler and D. B. Thomson of the Los Alamos Scientific Laboratory suggested in 1963 the possibility of using a high power laser to pre-ionize and heat a target material to be contained in an explosively driven theta pinch machine. There had been calculations performed by John Dawson, Princeton University, and A. Engel­hardt, Westinghouse Research Laboratories, which indicated that such an approach was theoretically feasible. The laser powers required, however, were …

Determination Of Required Component Reliability From System Reliability Requirements, Arthur M. Breipohl

Electrical and Computer Engineering ETDs

No abstract provided.

Analysis And Synthesis Of A Current Regulator System, William P. Aiello

Electrical and Computer Engineering ETDs

This report describes a practical current regulator system used to accurately control the current delivered by a 500 kilowatt motor-generator unit. The generator supplies its current of 2000 amperes at 250 volts to a large water-cooled air-core solenoid used by LASL Group P-7 for experiments in connection with the Sherwood program.

After a general discussion of the system specifications and the basic regulator loop, each of the components in the basic regulator loop is described in considerable detail. The description, in most cases, is mathematical in nature although many circuit diagrams are included with brief descriptions when necessary for proper …

An Experimental Investigation Of Receiver System Sensitivity, James Henry Johnson

Masters Theses

"A method of determining the minimum detectable power density incident at the receiving antenna of a UHF receiver is proposed. The minimum detectable power density is the power density required to produce a signal-to-noise ratio of unity in the output of the receiver. The proposed method includes the receiving antenna impedance, the necessary connecting transmission lines, and the receiver impedance.

It is shown that an error in the antenna directivity will produce a significant error in the overall sensitivity of a receiving system. Since the directivity is the most difficult system variable to determine experimentally, it is probably the limiting …

Design Of An Intermediate Frequency Amplifier And Variable Frequency Oscillator, Robert Charles Mcintyre

Masters Theses

"Since the advent of the transistor in 1948 many technological barriers have been overcome in the field of semiconductors. Unfortunately, however, there is a considerable period of time between the discovery of a scientific phenomena and its widespread use and understanding by practicing engineers. The motivating factor which prompted this investigation was primarily the lack of knowledge which the author possessed concerning transistors. The selection of the amplifier and oscillator design confined the study primarily to the transistor. Considerable time, however, had to be spent in the study of basic transistor theory before any phase of the design could be …

Automatic Tuning Of A.C. Compensating Networks, Giles C. Sinkewiz

Masters Theses

"The purpose of this thesis is to illustrate the practicality of using an auxiliary servo system to shift parameters in damping networks of the main servo system.

Since amplification is most easily achieved with A.C. amplifiers and since A.C. servo motors are superior in operation to D.C. servo motors, because no brushes or commutators are needed, the A.C. servo system is widely used. However, one major problem is confronted when designing an A.C. servo system. This is the problem of designing damping circuits and compensating circuits which are insensitive to carrier frequency fluctuations. Notch filters provide the desired transfer functions, …

Analysis And Simulation Of A Cross-Correlation Communication System, Dennis Jay Gooding

Masters Theses

"Statement of the problem. The purpose of this study was (1) to calculate the probability of error as a function of receiver input signal-to-noise ratio for a typical communication system employing cross-correlation detection; (2) to design and construct an experimental model of such a communication system for the purposes of demonstrating the operation of the system and verifying the theoretical calculations"--Introduction, page 1.

The Equalization And Optimization Of A Third-Order Type-1 Position Control System, Viswanatha Seshadri

Masters Theses

"While the practice of feedback control dates back to the day when the earliest living organisms began to react to their environmental conditions and the changes therein, it has been only during the past two decades that this technique came to be subjected to a scientific examination. Yet, an astoundingly rapid advancement has resulted in the field of servo-mechanisms, contributing substantially to the development of modern civilized existence and activity to its present standards, and promising to contribute, to an ever-increasing extent, to the accelerated progress of scientific and industrial enterprise in this space age.

The principal concerns of the …

A Method For The Prediction Of Detection Ranges For Pulsed Doppler Radar, Phillip Orlan Brown

Masters Theses

"Modern radar systems must provide greater detection ranges both against high and low altitude targets because of the significant advances in weapon speed and range. Extended range indicates that the power transmitted by the radar must be increased. It follows, that ground return becomes a problem even at high altitudes.

There are at present three basic types of radars which are (1) pulsed, (2) continuous wave, and (3) pulsed doppler radar. The conventional pulsed radar now closely approaches the theoretical optimum performance; however, it does not have the inherent ability to distinguish between ground return and moving targets. The continuous …

A Theoretical And Experimental Analysis Of A Hall Generator, David L. Endsley

Electrical and Computer Engineering ETDs

This is a study of the behavior of a "Hall Effect" device by theoretical and experimental methods to determine if its operation may be predicated for various magnetic fields, output resistances, operating temperatures, input resistances, input control currents, and device construction.

This information should prove useful in the design of a circuit where the use of a "Hall Effect" device is contemplated.

A Reactor Transfer Function Analyzer, Earl O. Swickard Jr

Electrical and Computer Engineering ETDs

This thesis describes the design of a device for determining the transfer function of a nuclear reactor. A number of different methods have been successfully employed for this purpose but were, in some cases, tedious or required the use of delicately balanced components. The equipment described computes values which are simply related to the values of the transfer function and is operable over a frequency range of about 1000:1. The time required to obtain data for one frequency point is two minutes or less. No precise adjustment is necessary during operation.

Transient Response Of A Mass Mounted On A Nonlinear, Strain-Rate Sensitive Element, Wiley T. Holmes

Electrical and Computer Engineering ETDs

The object of the present transient movement study was not that of investigation of response of a nonlinear system alone, but was projected to include the effect of a strain-rate sensitive, nonlinear restoring element.

Transistor Distributed Amplifier, Bill J. Harper

Electrical and Computer Engineering ETDs

For the purpose of this report, it is assumed that the behavior of the transistor can be predicted from the study of a suitable circuit model or equivalent circuit of the transistor. It is further assumed that, except for the intrinsic short-circuit current gain, the circuit parameters of he transistor are independent of frequency and temperature. The primary interest in the study of transistor distributed amplifier here is the amplitude of the voltage gain in the amplification of video frequencies. Somewhat less detailed studies are made of the distributed amplifier in band-pass applications.

An Experimental Investigation Of A Small Volume Sandwich Antenna In The 400 Megacycle Frequency Range, James Gilbert Smith

Masters Theses

"Scope of the Investigation: The small volume sandwich antenna was patterned after that of F. D. Clapp's which appears in an unpublished report written for the United States Navy. Clapp's antenna is shown in Figure 2. The antenna described in this report was investigated at approximately one-thousandth of the volume of the original Clapp antenna. Clapp's antenna was designed for the 225-400 megacycle range; while the author's model was designed for operation at 400 megacycles.

The objective of this investigation was to build a small volume sandwich antenna which could be adapted to satisfy the characteristics listed on page 1. …

An Amplitude-Stable, Fixed-Frequency Transistorized Power Supply, Bobby O. Allen

Electrical and Computer Engineering ETDs

The subject of this paper is the design of an ultrastable, fixed- frequency power supply capable of maintaining a high degree of amplitude stability over a wide range of resistive load values. The requirement for such a power supply originally arose in connection with the design of a particular piece of test equipment required by Sandia Corporation. No attempt will be made in this paper to justify or explain the necessity for the specified design criteria outlined in the following paragraphs other than to adequately define the design criteria.