Using a Capacitor Antenna for Electromagnetic Signal Pickup

AI Thread Summary
A parallel plate capacitor can theoretically be used as an antenna to pick up the electric component of an electromagnetic signal, though practical limitations exist. The shielding effect of the armatures may hinder effective signal reception. Variations of dipole antennas, such as those using capacitive "top hats" or end plates, can enhance performance by making the antenna appear electrically longer. This concept is akin to center-loaded dipoles or monopoles, which utilize inductance to achieve similar effects. Overall, while feasible, using a capacitor antenna presents challenges that may limit its effectiveness.
crx
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It is possible to use a parallel plate capacitor as an antenna to pick up the electric component of an electromagnetic signal ? Thanks .
 
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i guess not because the armatures would shield out the electric field...
 
crx said:
It is possible to use a parallel plate capacitor as an antenna to pick up the electric component of an electromagnetic signal ? Thanks .

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

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