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Title:An electrically small multi-port loop antenna for direction of arrival estimation
Author(s):Scott, Robert
Advisor(s):Bernhard, Jennifer T.
Department / Program:Electrical & Computer Eng
Discipline:Electrical & Computer Engr
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:M.S.
Genre:Thesis
Subject(s):Direction of Arrival
Direction Finding
Multi-Port Loop Antenna
Electrically Small
Abstract:Direction of arrival (DoA) estimation or direction finding (DF) requires multiple sensors to determine the direction from which an incoming signal originates. These antennas are often loops or dipoles oriented in a manner such as to obtain as much information about the incoming signal as possible. For direction finding at frequencies with larger wavelengths, the size of the array can become quite large. In order to reduce the size of the array, electrically small elements may be used. Furthermore, a reduction in the number of necessary elements can help to accomplish the goal of miniaturization. The proposed antenna uses both of these methods, a reduction in size and a reduction in the necessary number of elements. A multi-port loop antenna is capable of operating in two distinct, orthogonal modes - a loop mode and a dipole mode. The mode in which the antenna operates depends on the phase of the signal at each port. Because each element effectively serves as two distinct sensors, the number of elements in an DoA array is reduced by a factor of two. This thesis demonstrates that an array of these antennas accomplishes azimuthal DoA estimation with 18 degree maximum error and an average error of 4.3 degrees.
Issue Date:2014-05-30
URI:http://hdl.handle.net/2142/49439
Rights Information:Copyright 2014 Robert Scott
Date Available in IDEALS:2014-05-30
Date Deposited:2014-05


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