【摘要】 本文根据麦克斯韦方程,应用虚功原理推导了电磁场中的最小作用原理表达式,并把它作为统一的变分原理,推导了谐振频率、传播常数以及波导接头的阻抗等电磁场工程问题的泛函表达式.这些表达式在微波技术和光波导技术中是非常有用的.更多还原

【Abstract】 In the paper, according to Maxwell’s equations, the expression of the principle of least action has been derived by the theory of imaginarx work, and the functional expressions for the electromagnetic field problems, for instance, a resonant frequency, a propagation constant, and an impedance of the waveguide junctions etc. are derived all from the principle of least action which is considered as unified variational theory.Three expressions are very useful in the microwave and optical waveguides techniques.更多还原