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Who can and will succinctly explain CFA (E cross H) antenna?

Discussion in 'Antennas, Feedlines, Towers & Rotors' started by AH7I, Jan 14, 2021.

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  1. AH7I

    AH7I Ham Member QRZ Page

  2. G0GSR

    G0GSR Ham Member QRZ Page

    They don't work :)
    Frank
     
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  3. WA7ARK

    WA7ARK Ham Member QRZ Page

    The most succinct explanation: BS
     
  4. WB5YUZ

    WB5YUZ Ham Member QRZ Page

    I still remember people talking about that demonstration antenna in Egypt, though. I remember reading about it on the web in the very early days of the web and thinking, It sounds too good to be true. If it is, in a few years they will be building them everywhere and I will know.

    I had subsequently forgotten about them, because I've never seen one being built around here, so obviously they don't work as well as those hyping them claimed. But the level of theory necessary to dissect the explanation in the linked article is beyond me.
     
  5. K4MJA

    K4MJA XML Subscriber QRZ Page

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  6. NG1H

    NG1H XML Subscriber QRZ Page

    The author of the link comes across as confused about the difference between pattern shape and radiation efficiency (paraphrasing: "It has a high gain in one lobe, therefore it is highly efficient").

    Yes, later on the author starts talking correctly about efficiency but that one line throws doubt.
     
  7. AH7I

    AH7I Ham Member QRZ Page

    While succinct, that does not explain errors in the referenced paper.

    73, -bob
     
  8. AH7I

    AH7I Ham Member QRZ Page

    Can you be more specific? What is wrong with the model?
     
  9. AH7I

    AH7I Ham Member QRZ Page

  10. AH7I

    AH7I Ham Member QRZ Page

    Seriously. Out of all the antenna experts reading this forum... Some with EE PhD...

    What is wrong with the theory of operation presented in the reference.

    1. The freshman physics part.
    2. The Maxwell's #4 argument?
    3. Anything else?
     

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