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In a lossless dielectric the attenuation constant is

  • A.zero
  • B.equal to the phase constant
  • C.half the phase constant
  • D.equal to the reciprocal of the wavelength

Answer: A

With no conductivity and no dielectric loss there is nothing to absorb energy, so the amplitude is maintained indefinitely and only the phase advances. Real dielectrics have a small loss tangent and therefore a small but non-zero attenuation.

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