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Thread: Difference between antenna?

  1. #1
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    Difference between antenna?

    Hello,

    The antenna on the left is a 1.2Ghz and the one on the right is a 433Mhz. Why do not she have the same shape? They are both dipoles?

    Thanks

    Last edited by Swake; 27th October 2018 at 01:47 AM.

  2. #2
    Pilot
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    Quote Originally Posted by Swake View Post
    Hello,

    These two antennas are in 433Mhz but why are not they of the same length?

    Thanks


    One is quarter and one is half wavelength my guess... All else being equal the longer will perform better.

  3. #3
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    Sorry, I was wrong in the question. I changed it.

  4. #4
    Navigator lucky72's Avatar
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    Quote Originally Posted by Swake View Post
    Hello,

    The antenna on the left is a 1.2Ghz and the one on the right is a 433Mhz. Why do not she have the same shape? They are both dipoles?

    Thanks


    The short answer is one is a whip(long) and the other a rubber duck. Frequency typically drives the length of the antenna. If Im not mistaken the inside of the rubber duck is more than a simple wire, hence the housing.
    This site explains it better than I can.
    Stephen
    https://martybugs.net/wireless/rubberducky.cgi

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