Under the excitation of an impulse, the radiation field has to be evaluated in terms of precise Fresnel-Kirchhoff formula; otherwise, some important transient features would be lost.
指出在瞬态信号激励下，必须用严格的夫累涅尔-基尔霍夫公式来计算辐射场，否则将丢失许多重要的瞬态特性。
Firstly according to radiation theory the boundary function of planar diffraction body is given, based on this condition the Kirchhoff diffraction formula is deduced and obtained.
根据辐射理论重新设定了平面衍射物的边界函数，并以此条件推导了基尔霍夫衍射公式，并赋予新的含义。
The zoning rules for two dimensional ring of Frensel zone plate is studied by means of Kirchhoff diffraction formula.
从基尔霍夫绕射公式出发进一步研究菲涅耳区板的二维圆环的分区规则。
The zoning rules for two dimensional ring of Frensel zone plate is studied by means of Kirchhoff diffraction formula.
从基尔霍夫绕射公式出发进一步研究菲涅耳区板的二维圆环的分区规则。
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