在光学中，近场（Near Field）和远场（Far Field）是描述光波传播时不同位置的两种特定区域。近场（Ne...
当菲涅尔数远小于1时,为夫琅禾费衍射(Fraunhofer diffraction),即远场衍射。例如在如通常的成像光学中聚焦位置所发展的衍射,即艾里斑( Airy diffraction pattern): 圆形孔径的艾里斑(from wikipedia) 当菲涅尔数远大于1时,为菲涅尔衍射(Fresnel diffraction),即近场衍射。由于探测器非常接近衍射发生的位置(如小孔),...
近场光学研究非辐射模式的非均匀场及其与物质的相互作用，通常位于辐射源区域或折射率/介电常数非均匀的位置界面。近场定义模糊，不同研究领域有各自界定。一般认为，辐射源附近或倏逝波不可忽略的区域属于近场。在电磁场增强、偶极子发射源或局域场增强超分辨等领域，通常将[公式]量级范围视为近场。研...
硕士论文:vsfar-field分歧 翻译结果5复制译文编辑译文朗读译文返回顶部 近领域对领域分歧 相关内容 a我们应该认识到 We should realize [translate] a由出资最多 Are most by the investment [translate] aUsers must be at least 18 years of age to join our website. 用户必须是加入我们的网站的至少18岁。
Focuses on the far field of an antenna system. Definition of far field and near field systems; Criteria for defining the boundary between far field and near fields; Existence of wave impedance in the system.EDNCappsCharlesC. Capps, "Near field or far field?," EDN, pp. 95-102, 16-Aug-...
6) near-to-far-field transformation 近场-远场变换 1. In the paper,the three-dimensional standard parabolic equation(SPE) and near-to-far-field transformation are deduced,and the radar cross section(RCS) of a perfectly conducting sphere is calculated. 文章推导了三维标准的抛物线方程及相应的近...
Here, it is also of interest that objects in the near field can have a direct back-action on the antenna, while more distant objects can receive radiation without affecting the antenna. The near field also contains rapidly decaying field components which are not observable at larger distances. ...
当第k个入射信号是near-field信号时, 满足如下形式: λ表示波长, 和 分别表示第k个源信号的DOA和range。根据菲涅耳区域的定义, ,并且 表示阵列孔径。 当第k个入射信号是far-field信号时, 满足形式: 将公式(1)写为矩阵形式,可以表示为: 其中 和
Near-field and far field region 翻译结果4复制译文编辑译文朗读译文返回顶部 Near-field and far field District 翻译结果5复制译文编辑译文朗读译文返回顶部 Near field area and distant field area 相关内容 a需要现实一点 Needs reality one[translate] ...
Experimental and Modelling studies have been used to investigate the biogeochemical processes occurring at the interface zone between the near-field and far-field of the Drigg Low-Level radioactive Waste (LLW) trenches. These have led to a conceptual model of interface biogeochemistry, which has su...