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Is radio path chanell respone symmetry ?

  1. Jun 2, 2012 #1
    assume I sample signal between Transmiter to Reciver T->R
    Is the chanell respone would be the same to R->T also?

    especially I wonder about knife difraction effect ( Fresnel zone )
  2. jcsd
  3. Jun 2, 2012 #2


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    You seem to be referring to the principle of 'Reciprocity' which says that a receiver and transmitter can be transposed in a link, all things being equal, and the same signal level will be received.
    I think it holds good as long as you can be sure that the conditions are strictly adhered to. The diffraction situation would also hold - because every RF link involves diffraction. Sometimes it's more obvious than at other times.
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