期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
弯曲波纹圆波导中模式耦合系数的研究 被引量:3
1
作者 李宏福 manfred thumm 《红外与毫米波学报》 SCIE EI CAS CSCD 北大核心 1992年第6期486-491,共6页
分析了波纹圆波导中由曲率所引起的模式耦合问题.从环形坐标系统中麦克斯韦方程出发导出了耦合系数的积分公式,并进一步推导了各模式间耦合系数的显式.
关键词 传输线 波导 模式 耦合 皱纹波导
下载PDF
直径渐变的波纹圆波导的研究 被引量:1
2
作者 李宏福 manfred thumm 《电子学报》 EI CAS CSCD 北大核心 1993年第3期14-19,共6页
本文从麦克斯韦方程出发,推导出了直径均匀渐变的波纹圆波导中模式耦合的积分公式,并进而导出了这种波纹波导中各种模式间耦合系数的明确显式。
关键词 波纹圆波导 模式耦合系数 波导
下载PDF
On the Evolution of Approaches to the Space-Time Symmetry
3
作者 Mikhail Petelin manfred thumm 《Natural Science》 2018年第3期81-84,共4页
The general space-time composition was analyzed starting in ancient times. During the previous three millenniums, to explain elementary physical phenomena, the world was twice admitted to be immersed into an “aether... The general space-time composition was analyzed starting in ancient times. During the previous three millenniums, to explain elementary physical phenomena, the world was twice admitted to be immersed into an “aether”. Presently the “aether” is assumed to be asymptotically close to the vacuum. This approximation is included in the foundation of the special theory of relativity. 展开更多
关键词 SPACE-TIME SYMMETRY Ecclesiastes ARISTOTLE Proclus GALILEO Michelson Voigt “Aether” LORENTZ Transformation Theory of RELATIVITY
下载PDF
On the Elementary Mechanical Effects of the Space-Time-Symmetry Relativity
4
作者 Mikhail Petelin manfred thumm 《Natural Science》 2020年第9期661-665,共5页
This paper is an addendum to the article <span style="font-family:Verdana;">“</span><span style="font-family:Verdana;">On the Evolution of Approaches to the Space- Time Symmetry&... This paper is an addendum to the article <span style="font-family:Verdana;">“</span><span style="font-family:Verdana;">On the Evolution of Approaches to the Space- Time Symmetry</span><span style="font-family:Verdana;">”</span><span style="font-family:Verdana;">, Natural Science, Vol. 10, No. 3, pp. 81-84, 2018. The analysis is based on the Galileo</span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;">s postulate that all inertial reference frames are equal. The postulate results immediately in the absolute speed limit, which is identical for all bodies in all reference frames. Two kinds of elementary particles are admitted: unhurried and restless ones (ex-emplified, accordingly, with electrons and photons). Any particle may be treated as wave packet, the particle mass and momentum depending on the reference frame. Thus, space-time-sym- metry is the natural background for the relativistic and quantum theo-ries.</span> 展开更多
关键词 Absolute Speed Limit Restless and Unhurried Elementary Particles Particle Wave Packets Mass-Momentum Relation
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部