Degree Type

Dissertation

Date of Award

2008

Degree Name

Doctor of Philosophy

Department

Electrical and Computer Engineering

First Advisor

Robert J. Weber

Second Advisor

Robert J. Weber

Third Advisor

Jiming M. Song

Abstract

This dissertation presents a new architecture for controlling the amplitude and phases of signals in a fully integrated phased array system. The phase shifting is performed at baseband and is up-converted to a RF band using a phased locked loop as a frequency synthesizer which allows for precise control of the RF phases. A structure for a phase aid is presented for a fast phase hopping system. A mathematical model was shown for an adjustable amplification within a phased locked loop to mitigate phase distortion. A mutual coupling correctional network was proposed to mitigate pattern distortion induced from the active impedance model. An automatic tuner to reduce manufacturing variations within an array was proposed that will reduce unwanted effects from the active impedance model and minimize the losses due to reflections. A polarization alignment system was also proposed that will help improve the overall gain between the transmitting and receiving system.

DOI

https://doi.org/10.31274/rtd-180813-16989

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Shannon Wanner

Language

en

Proquest ID

AAI3383372

OCLC Number

492205611

ISBN

9781109454802

File Format

application/pdf

File Size

94 pages

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