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Control of electromagnetic wave by modulation of medium parameters by finite packet pulses

机译:通过有限包脉冲调制介质参数来控制电磁波

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Abstract: Transformation of electromagnetic wave in a medium which permittivity and conductivity is being modulated by a finite packet of periodic rectangular pulses is considered. There are not restrictions on duration and amplitude of modulation pulses as well as on an initial wave amplitude and frequency. It is shown that the initial electromagnetic wave is split by a pulse packet into two waves, direct and inverse, with the same frequency as the initial wave has. The amplitudes of these waves depend on a number of pulses and its duration as well as on medium parameters very strong. There are such parameters that the secondary waves can be amplified but the amplification is absent when a medium conductivity changes only. It is revealed that wave amplitudes can change irregularly with the pulse number. Irregular behavior of amplitudes has intermittent character when a slight changing of the amplitude alternates with great amplitude peaks. This process is controlled by a generalized parameter an expression for which is derived. The criteria for monotonous or irregular behavior of the secondary wave amplitudes is derived.!14
机译:摘要:考虑了介电常数和电导率受周期矩形脉冲有限包调制的介质中电磁波的转换。对调制脉冲的持续时间和幅度以及初始波幅度和频率没有限制。可以看出,初始电磁波被脉冲包分成两个波,正向和反向,其频率与初始波相同。这些波的幅度取决于多个脉冲及其持续时间以及非常强的介质参数。存在这样的参数,使得可以放大次级波,但是仅在介质电导率改变时不存在放大。结果表明,波幅随脉冲数的变化而变化。当幅度的微小变化与大的幅度峰值交替出现时,幅度的不规则行为具有间歇性。该过程由广义参数控制,为其导出表达式。推导了次级波振幅的单调或不规则行为的标准。14

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