摘要
本文深入探讨电磁理论中的复参量和复定理。由于复数引入电磁场,使实域中的两个物理概念,如传输和损耗,电阻和电抗以及谐振频率和品质因数在更高的层次上统一了起来。文中给出了复频率Poynting定理,得到不论是开放空间还是封闭空间都有广义品质因数Q=ω′W/PL,而复频率Foster定理表明:■*/ω=0。文中指出:对于有耗系统,例如天线辐射系统,输入阻抗中的电抗xin存在负斜率区域。
In the paper, complex parameters and complex theorems of electromagnetic theory are discussed in detail. Due to the introduction of complex to electromagnetic fields, the two real domain physical concepts, such as transmission and loss, resistance and reactance, resonant frequency and quality factor are unified together at a higher level. It is the complex frequency Poynting theory proposed in this paper that has general Q-factor Q =ω′ W/PL in both open space and closed space. The complex frequency Foster theory shows δz^-＊/δω^-=0. It is presented that the reactance xin of input impedance has negative slope region inlossless system.
出处
《电气电子教学学报》
2009年第5期1-5,共5页
Journal of Electrical and Electronic Education
基金
教育部<创新教学团队>资助
