An electrically small multi-port loop antenna for direction of arrival estimation

Direction of Arrival;Direction Finding;Multi-Port Loop Antenna;Electrically Small

Scott, Robert ; Bernhard ; Jennifer T.

关键词: Direction of Arrival;    Direction Finding;    Multi-Port Loop Antenna;    Electrically Small;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/49439/Robert_Scott.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

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 suchas to obtain as much information about the incoming signal as possible. For direction finding at frequencies with larger wavelengths, the size of the arraycan 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 areduction 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 antennaoperates 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 18degree maximum error and an average error of 4.3 degrees.