Application Value of Slow Decay Behavior of Energy Density Excited by Electromagnetic Pulses

By comparing the radiated energy densities excited by the continuous wave (CW), the sinusoidal pulse, the Gaussian pulse and the rectangular pulse respectively with the same energy, it is shown that the pulses are not more efficient than CW in the energy transmission. For the sinusoidal pulse and the CW, the radiated energy densities are the same in far zone. The radiated energy density of the Gaussian pulse is equal to the one of CW in far zone when the pulse width equals 1/2 of the CWs period T₀. The energy transmission of pulse is more efficient only in the case of 0/2. For the rectangular pulse, the radiated energy density is equal to the one of CW in far zone when the maximum of frequency spectrum is 10f₀ (f₀=1/T₀) and the pulse width is T₀. The numerical results and theoretical analysis in this paper show that the application value of the slow decay behavior of the energy density excited by electromagnetic pulses is limited.