论文标题
使用矩的方法对热发射器的模态表征
Modal characterization of thermal emitters using the Method of Moments
论文作者
论文摘要
由于发射场的部分空间连贯性，依赖自发发射的电磁源很难在没有适当框架的情况下表征。在本文中，我们建议通过其自然发射模式来表征任何形状的发射器，即一组连贯的模式，这些模式累加不连贯。所得框架非常直观，因为任何发射极被视为模式之间零相关性的多模天线。此外，对于任何有限的发射极，模式形成一个可以截断的紧凑型集。每种重要模式对应于一个独立的自由度，发射极辐射功率。提出的形式主义是使用矩（MOM）的方法实施的，并应用于有损的球体和有损椭圆形。结果表明，可以用少数模式来表征电小型结构，并且随着结构变大，该数字会增长。
Electromagnetic sources relying on spontaneous emission are difficult to characterize without a proper framework due to the partial spatial coherence of the emitted fields. In this paper, we propose to characterize emitters of any shape through their natural emitting modes, i.e. a set of coherent modes that add up incoherently. The resulting framework is very intuitive since any emitter is regarded as a multimode antenna with zero correlation between modes. Moreover, for any finite emitter, the modes form a compact set that can be truncated. Each significant mode corresponds to one independent degree of freedom through which the emitter radiates power. The proposed formalism is implemented using the Method of Moments (MoM) and applied to a lossy sphere and a lossy ellipsoid. It is shown that electrically small structures can be characterized with a small number of modes, and that this number grows as the structure becomes electrically large.
