1·There are a number of alternative formulations of the reciprocity theorem.
还有许多别的互易定理的公式。
2·The integral expressions for scattered fields including the second-order scattering terms are given based on the reciprocity theorem.
在互易原理的基础上，得到了计入相邻目标二次散射的散射场的积分表达式。
3·Expressions of the coupling length and the coupling area of an antenna to electromagnetic waves excitation are deduced with the reciprocity theorem.
应用互易定理推导出了电磁波激励下天线的耦合长度和耦合面积的表达式，这两个物理量可以表征天线的响应特性。
4·On applying the diffraction theory and with the aid of the reciprocity theorem, an approximate formula for the radiation field of a slot cut in a metal sheet of finite size is derived.
本文应用绕射理论并借助于互易定理，导出了一个在有限尺寸金属平板上割出的一条裂缝的近似辐射埸公式。
5·The expressions of external and internal coupling were derived from the reciprocity theorem by analysing slot voltage distribution in this paper, which invoked magnetic current to slots.
其中包含了缝隙之间的内（外）部互耦以及介质的影响。 缝隙之间的内（外）部互耦是从缝隙的口径电压出发、将缝隙等效为磁流源、通过互易原理而获得。