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Evaluation of Electromagnetic Coupli...

Henault, Simon.

Evaluation of Electromagnetic Coupling in Antenna Systems A Unified Theory and its Applications.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Evaluation of Electromagnetic Coupling in Antenna Systems A Unified Theory and its Applications.
Author:	Henault, Simon.
Description:	300 p.
Notes:	Source: Dissertation Abstracts International, Volume: 73-08(E), Section: B.
Notes:	Adviser: Yahia M. M. Antar.
Contained By:	Dissertation Abstracts International73-08B(E).
Subject:	Engineering, Electronics and Electrical.
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NR83405
ISBN:	9780494834053

Evaluation of Electromagnetic Coupling in Antenna Systems A Unified Theory and its Applications.
Henault, Simon.

Evaluation of Electromagnetic Coupling in Antenna Systems A Unified Theory and its Applications. - 300 p.

Source: Dissertation Abstracts International, Volume: 73-08(E), Section: B.

Thesis (Ph.D.)--Royal Military College of Canada (Canada), 2012.

The performance of antenna systems in general is affected by electromagnetic coupling with other antennas and surrounding structures. Antenna arrays in particular are vulnerable to mutual coupling between their antenna elements and nearby scatterers. These arrays are employed in a variety of applications, including direction of arrival estimation, beamforming and interference suppression, and the accurate evaluation of electromagnetic coupling is critical to their calibration and the optimization of their performance. Various methods have been presented in the literature for evaluating electromagnetic coupling in antenna systems, often very conveniently and efficiently calibrating arrays using small coupling matrices. However, these methods appear to resort to oversimplifying assumptions restricting them to specific array and element geometries. Methods that are applicable to systems of arbitrary geometries appear to-require excessive amounts of measurements, calculations and memory. Unfortunately, no work has bridged the gap between efficient electromagnetic coupling evaluation methods and those that are applicable to systems of arbitrary geometries. This thesis proposes to do so by unifying the theory of electromagnetic coupling evaluation. Extending on the concept of coupling matrices, the theory is intended to be applicable to the calibration of both transmitting and receiving antenna systems, including antenna arrays subject to strong mutual coupling between their elements and with nearby scatterers. Useful analytical formulations are first derived as theoretical foundations for unifying the theory. These are compared with existing formulations, and particular attention is given to the size reduction of the matrices for minimizing the memory requirement and computational complexity involved in accurate calibration. Also, the minimization of the number of measurements required for accurate calibration is studied to simplify experimental calibration methods. Finally, practical factors influencing the accuracy of electromagnetic coupling evaluation using theoretical and experimental methods are studied, and various applications of the theory are presented. This work should help improve the performance of antenna systems in general and fills important gaps in the areas of antenna theory, mutual coupling estimation and compensation, complex structure modeling, and antenna measurements.

ISBN: 9780494834053Subjects--Topical Terms:

226981
Engineering, Electronics and Electrical.

Evaluation of Electromagnetic Coupling in Antenna Systems A Unified Theory and its Applications.
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245 1 0 $a Evaluation of Electromagnetic Coupling in Antenna Systems A Unified Theory and its Applications.
300 $a 300 p.
500 $a Source: Dissertation Abstracts International, Volume: 73-08(E), Section: B.
500 $a Adviser: Yahia M. M. Antar.
502 $a Thesis (Ph.D.)--Royal Military College of Canada (Canada), 2012.
520 $a The performance of antenna systems in general is affected by electromagnetic coupling with other antennas and surrounding structures. Antenna arrays in particular are vulnerable to mutual coupling between their antenna elements and nearby scatterers. These arrays are employed in a variety of applications, including direction of arrival estimation, beamforming and interference suppression, and the accurate evaluation of electromagnetic coupling is critical to their calibration and the optimization of their performance. Various methods have been presented in the literature for evaluating electromagnetic coupling in antenna systems, often very conveniently and efficiently calibrating arrays using small coupling matrices. However, these methods appear to resort to oversimplifying assumptions restricting them to specific array and element geometries. Methods that are applicable to systems of arbitrary geometries appear to-require excessive amounts of measurements, calculations and memory. Unfortunately, no work has bridged the gap between efficient electromagnetic coupling evaluation methods and those that are applicable to systems of arbitrary geometries. This thesis proposes to do so by unifying the theory of electromagnetic coupling evaluation. Extending on the concept of coupling matrices, the theory is intended to be applicable to the calibration of both transmitting and receiving antenna systems, including antenna arrays subject to strong mutual coupling between their elements and with nearby scatterers. Useful analytical formulations are first derived as theoretical foundations for unifying the theory. These are compared with existing formulations, and particular attention is given to the size reduction of the matrices for minimizing the memory requirement and computational complexity involved in accurate calibration. Also, the minimization of the number of measurements required for accurate calibration is studied to simplify experimental calibration methods. Finally, practical factors influencing the accuracy of electromagnetic coupling evaluation using theoretical and experimental methods are studied, and various applications of the theory are presented. This work should help improve the performance of antenna systems in general and fills important gaps in the areas of antenna theory, mutual coupling estimation and compensation, complex structure modeling, and antenna measurements.
520 $a Keywords: Mutual coupling, antenna arrays, beamforming, null-steering, direction of arrival, estimation, pattern synthesis, calibration, mutual impedance, wideband, method of moments, polarization, reciprocity, retrodirective.
590 $a School code: 1103.
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790 1 0 $a Antar, Yahia M. M., $e advisor
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791 $a Ph.D.
792 $a 2012
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