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

How does an antenna work?

  1. Aug 31, 2011 #1
    Does it draw the frequencies it's made for, or just stand in their way and gather them as they hit it?

    What is the difference between a round antenna rather than one with straight lines?
  2. jcsd
  3. Aug 31, 2011 #2
    Stands in the way and gathers.

    The gain in particular directions.
  4. Sep 1, 2011 #3


    User Avatar

    Staff: Mentor

    Antennas generally resonate with EM frequencies that they are designed to receive. In a way, you can think of them as "bells" designed to resonate at some frequency. The resonating action gives you gain that helps to make the receive and transmit functions efficient.

    Here is some introductory reading:

    http://en.wikipedia.org/wiki/Antenna_(radio [Broken])

    Let us know if you have specific questions in that material.
    Last edited by a moderator: May 5, 2017
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook