The Exact And Approximate Transient Field Of Vertical And Horizoiltal Dipole Excited By Double Exponential Pulse

The double exponential electromagnetic pulse is a common high-power pulse. And it will have a great interference or even damage to the electronic devices and systems. Therefore, the study of the propagation characteristics of transient field excited by double exponential pulse has important theoretical significance and application value.In the present study, we derived the expression of transient field excited by a vertical or horizontal dipole near the boundary of uniform half-space. We deduced the exact field of the electromagnetic components through the convolution of the transient field from a delta func-tion excitation. Then, for the components which cannot be expressed by exact formulas, we derived the expressions by inverse Fourier transform on the frequency domain of approximate field. Based on the theoretical derivation, computational simulations were also carried out. We compared and analyzed the exact solutions and approximate solutions to verify the correctness of the approximate solutions. And the propagation characteristics of direct wave, ideal reflected wave and lateral wave were analyzed by numerical simulation of each integral component. The conclusions are consistent with the research of lateral waves by King et al.