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单词 attenuation constant(symbol: α)
释义
attenuation constant(symbol: α)

Electronics and Electrical Engineering
  • The rate of exponential decrease in amplitude of voltage, current, or field-component in the direction of propagation of a plane progressive wave, at a given frequency. If I2 and I1 are the currents at two points a distance d apart (I1 being nearer the source of the wave), then

    I2=I1exp(αd)

    α is usually expressed in nepers or decibels.


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