Coaxial Cable Length Does Not Change Antenna SWR

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3 Responses

  1. Hello friend Gordon, nice to meet you.

    The resonance length is not related to impedance equilibria.
    In resonance jX = 0 ( Regardless of the impedance imbalance ), but the length of the coaxial cable changes the angle of the reflection coefficient and this, in turn, modifies the jX seen from Zi, causing that from the end of the line that conceives the transmitter, move the original resonance frequency of the antenna, displacing the entire bandwidth, including the SWR.
    In this link I explain the phenomenon.

    https://www.dropbox.com/s/fpeplh9s9bp1qnd/LENGTH%20OF%20COAXIAL%20CABLE%20AND%20NODES.pdf?dl=0

    I apologize for the translation errors into the English language, the important thing is the content.

    I hope I clarify many doubts.

    QRV.

    • AD5GG says:

      Hello Ramón!

      Thank you for your comment. There is no problem about your language – your English is much better than my Spanish! 🙂
      I think we are on the same page, but I am looking forward to reading your PDF tomorrow.
      I also see that you are using SMITH by Professor Dellsperger also. Great utility!
      73, de AD5GG

    • AD5GG says:

      Hello Ramón,
      Your article is a little difficult to understand sometimes because of the technical aspect of the translation. However, I really enjoyed reading it. There is a lot of useful information in your article, and I think it would be very good for the ham radio community if the article was professionally translated.
      Thank you for sharing it. 73!

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