radio frequency spectrum & antennas

Discussion in 'General Electronics Chat' started by micro1, Apr 29, 2016.

  1. micro1

    Thread Starter Member

    Feb 22, 2015
    52
    0
    hi all

    I have a question in my mind:

    how it was radio frequency spectrum Past and Present( is mean now )?

    how it was antennas Past and Present(is mean now )?
     
    Last edited: Apr 30, 2016
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
  3. micro1

    Thread Starter Member

    Feb 22, 2015
    52
    0
    please Join me your ideas about radio frequency spectrum and antennas at old and now :)
     
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