Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Capacitor antenna

  1. Apr 14, 2010 #1

    crx

    User Avatar

    It is possible to use a parallel plate capacitor as an antenna to pick up the electric component of an electromagnetic signal ? Thanks .
     
  2. jcsd
  3. Apr 14, 2010 #2

    crx

    User Avatar

    i guess not because the armatures would shield out the electric field....
     
  4. Apr 14, 2010 #3

    berkeman

    User Avatar

    Staff: Mentor

    Not a closely-spaced capacitor, but there is a variation on dipole antennas that uses capacitive "top hats" or end plates. It is similar in concept to center-loaded dipoles or monopoles, where you use an inductance in the middle of the element to make it look electrically longer:

    http://www.dougronald.com/images/PB020031.JPG

    .
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook