Computation of near-field microwave radiometric signals: definition and experimental verification
Computation of near-field microwave radiometric signals: definition and experimental verification
复制标题
近场微波辐射信号的计算：定义和实验验证
DOI：
10.1109/22.64615
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发表时间：
1991
影响因子：
4.3
通讯作者：
P. Gelin
中科院分区：
文献类型：
--
作者：
A. Mamouni;Y. Leroy;B. Bocquet;J. V. D. Velde;P. Gelin
提出了一种计算单模矩形波导孔径入射均匀损耗材料近场的方法。讨论了该方法的原理，并通过主动过程（天线向材料发射信号时）和被动过程（天线接收由材料的不同子体积传输的热噪声时）的实验验证了其结果。该方法已应用于功率和相关辐射测量信号的计算。在1.5 GHz和3ghz附近的水模型中，辐射测量数据与实验数据的比较表明两者非常吻合。因此，这种计算辐射信号的方法可用于医疗应用，其中经常检查高含水量组织。>
A method is developed for computing the near field transmitted by a monomode rectangular waveguide aperture into a homogeneous lossy material. The principle of this method is discussed, and its results are verified by experiments both in an active process (when the antenna transmits a signal toward the material) and in a passive process (when the antenna receives the thermal noise transmitted by the different subvolumes of the material). The method has been applied to the computation of radiometric signals for both power and correlation radiometry. Comparison of the radiometric with experimental data points out quite a good agreement in the case of models made of water near 1.5 and 3 GHz. Consequently, this method of computing the radiometric signals can be used for medical applications, in which high-water-content tissues are often examined. >