Boag A, Leviatan Y, Boag A
Department of Electrical Engineering, Technion-Israel Institute of Technology, Haifa.
IEEE Trans Biomed Eng. 1993 Sep;40(9):946-52. doi: 10.1109/10.245616.
A method is proposed for determining the excitation coefficients of an antenna array operating in a large rectangular waveguide and used as a hyperthermia system. The excitation coefficients of the array elements are optimized for attaining an improved specific absorption rate (SAR) distribution around a deep-seated tumor. The method is applied to a two-dimensional problem of a piecewise homogeneous post in a waveguide representing a section of the human torso. The array is operating below the cutoff frequency of the dominant mode of the waveguide. Numerical simulations have been performed to check the effectiveness of this approach. The results show that by using the proposed optimization method, SAR distributions can be improved.
提出了一种确定在大型矩形波导中工作并用作热疗系统的天线阵列激励系数的方法。对阵列元件的激励系数进行优化，以在深部肿瘤周围获得改善的比吸收率（SAR）分布。该方法应用于表示人体躯干一部分的波导中分段均匀柱体的二维问题。该阵列在波导主模的截止频率以下工作。已进行数值模拟以检验该方法的有效性。结果表明，通过使用所提出的优化方法，可以改善SAR分布。
