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Urthona26
Urthona26
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I heard that an antenna picks up signals of all frequencies, and then these signals are filtered by a circuit using an inductor and capacitor, and that this is how a radio is tuned.

However, I also heard that an antenna has a resonant frequency, and that this is determined by its length.

  • Does this mean that it will only pick up signals at or near to its resonant frequency?
  • What then is the point of a tuning circuit?
  • And what about transmitting antennas? Will they naturally transmit signals at their resonant frequency without the need of a tuner?
  • If antennas can receive signals of any frequency, and the tuning
    circuit filters out all the unwanted frequencies, why is it
    necessary to design antennas with a specific resonant frequency? Couldn't we use an antenna of any resonant frequency and just use
    the tuning circuit to get the frequency we want?

I heard that an antenna picks up signals of all frequencies, and then these signals are filtered by a circuit using an inductor and capacitor, and that this is how a radio is tuned.

However, I also heard that an antenna has a resonant frequency, and that this is determined by its length.

  • Does this mean that it will only pick up signals at or near to its resonant frequency?
  • What then is the point of a tuning circuit?
  • And what about transmitting antennas? Will they naturally transmit signals at their resonant frequency without the need of a tuner?

I heard that an antenna picks up signals of all frequencies, and then these signals are filtered by a circuit using an inductor and capacitor, and that this is how a radio is tuned.

However, I also heard that an antenna has a resonant frequency, and that this is determined by its length.

  • Does this mean that it will only pick up signals at or near to its resonant frequency?
  • What then is the point of a tuning circuit?
  • And what about transmitting antennas? Will they naturally transmit signals at their resonant frequency without the need of a tuner?
  • If antennas can receive signals of any frequency, and the tuning
    circuit filters out all the unwanted frequencies, why is it
    necessary to design antennas with a specific resonant frequency? Couldn't we use an antenna of any resonant frequency and just use
    the tuning circuit to get the frequency we want?
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Mike Waters
Mike Waters
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I heard that an antenna picks up signals of all frequencies, and then these signals are filtered by a circuit using an inductor and capacitor, and that this is how a radio is tuned. 

However, I also heard that an antenna has a resonant frequency, and that this is determined by its length. Does this mean that it will only pick up signals at or near to its resonant frequency? What then is the point of a tuning circuit? And what about transmitting antennas? Will they naturally transmit signals at their resonant frequency without the need of a tuner?

  • Does this mean that it will only pick up signals at or near to its resonant frequency?
  • What then is the point of a tuning circuit?
  • And what about transmitting antennas? Will they naturally transmit signals at their resonant frequency without the need of a tuner?

I heard that an antenna picks up signals of all frequencies, and then these signals are filtered by a circuit using an inductor and capacitor, and that this is how a radio is tuned. However, I also heard that an antenna has a resonant frequency, and that this is determined by its length. Does this mean that it will only pick up signals at or near to its resonant frequency? What then is the point of a tuning circuit? And what about transmitting antennas? Will they naturally transmit signals at their resonant frequency without the need of a tuner?

I heard that an antenna picks up signals of all frequencies, and then these signals are filtered by a circuit using an inductor and capacitor, and that this is how a radio is tuned. 

However, I also heard that an antenna has a resonant frequency, and that this is determined by its length.

  • Does this mean that it will only pick up signals at or near to its resonant frequency?
  • What then is the point of a tuning circuit?
  • And what about transmitting antennas? Will they naturally transmit signals at their resonant frequency without the need of a tuner?
Tweeted twitter.com/StackHam/status/1491698459866501120
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Urthona26
Urthona26
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  • 4

Does an antenna pick up signals of all frequencies or only its resonant frequency?

I heard that an antenna picks up signals of all frequencies, and then these signals are filtered by a circuit using an inductor and capacitor, and that this is how a radio is tuned. However, I also heard that an antenna has a resonant frequency, and that this is determined by its length. Does this mean that it will only pick up signals at or near to its resonant frequency? What then is the point of a tuning circuit? And what about transmitting antennas? Will they naturally transmit signals at their resonant frequency without the need of a tuner?