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首页> 外文期刊>IEEE Transactions on Biomedical Engineering >Theoretical and measured electric field distributions within an annular phased array: Consideration of source antennas
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Theoretical and measured electric field distributions within an annular phased array: Consideration of source antennas

机译：环形相控阵中的理论和实测电场分布：考虑源天线

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摘要

A detailed calculation of sources and electric fields associated with a prototype annular phased array for clinical hyperthermia is presented. Two antenna current distributions are used as field sources. One is based on a linear dipole model. The second models the thin strip antenna elements in detail, and the current is derived using the theory of a microstrip transmission line. These currents are then used to calculate the magnetic vector potential and the electric field. To verify the theoretical simulations, the magnitude of the electric field is measured under the same conditions as those used in the theoretical simulations. The comparison between measured and calculated fields demonstrates better convergence of theory and experiment when the antenna sources are modeled in detail. Thus, the use of these results for an improved incident-scatter model that will allow more general calculations of E fields in inhomogeneous media with irregular geometries is anticipated.
机译：提出了与临床热疗原型环形相控阵相关的源和电场的详细计算。两个天线电流分布用作场源。一种是基于线性偶极子模型。第二种方法对细条形天线元件进行了详细建模，并使用微带传输线理论推导了电流。然后将这些电流用于计算磁矢量电势和电场。为了验证理论模拟，在与理论模拟相同的条件下测量电场强度。在对天线源进行详细建模时，实测场与计算场之间的比较证明了理论与实验的较好融合。因此，期望将这些结果用于改进的入射-散射模型，该模型将允许在具有不规则几何形状的非均匀介质中对E场进行更一般的计算。

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