Title :
Gain optimization of a near-field focusing array for hyperthermia applications
Author :
Loane, Joseph T., III ; Lee, Shung-wu
Author_Institution :
Lockheed Missiles & Space Co., Sunnyvale, CA, USA
fDate :
10/1/1989 12:00:00 AM
Abstract :
A variation of the array gain optimization problem has arisen in the study of microwave arrays used for hyperthermia, the heating of biological tissue. For a given array configuration and arbitrary medium it is desired to maximize the power deposition at a prescribed focus in the near field of the array. The authors show how the optimum excitation can be found by solving an eigenvalue problem. Their optimum solution is compared with two other solutions, namely a closed-form solution which optimizes the power in one linear polarization of the radiated field, and a solution based on the popular conjugate-field scheme
Keywords :
antenna radiation patterns; antenna theory; biothermics; electromagnetic wave polarisation; focusing; microwave antenna arrays; optimisation; radiation therapy; radiofrequency heating; E-plane patterns; RF heating; biological tissue; biothermics; closed-form solution; conjugate-field scheme; eigenvalue problem; gain optimization; hyperthermia applications; microwave arrays; near-field focusing array; one linear polarization; optimum excitation; patient treatment; power deposition; radiated field; Biological tissues; Closed-form solution; Eigenvalues and eigenfunctions; Electromagnetic heating; Electromagnetic scattering; Hyperthermia; Microwave antenna arrays; Near-field radiation pattern; Polarization; Symmetric matrices;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
