Ham Radio - An end fed half wave cage antenna. How much wider bandwidth does it provide?

Discussion in 'Amateur Radio News' started by KB7TBT, Apr 25, 2021.

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  1. KB7TBT

    KB7TBT Ham Member QRZ Page

    Ham Radio - An end fed half wave cage antenna. How much wider bandwidth does it provide?
     
    JF1IRQ, PA0LGJ, WA7VTD and 4 others like this.
  2. W8AAZ

    W8AAZ Ham Member QRZ Page

    Has he done it with a pair of wires spread apart at one end and terminated together at the feed end? That would be a simpler way to get a wider element for homebrew antennas. I would think that could add bandwidth without so much wire and weight. The hams in the old days has issues with antennas like that from weight, ice buildup, wind load, etc. that you would expect over a single wire.
     
    JF1IRQ, WA7VTD and HB9EPC like this.
  3. HB9EPC

    HB9EPC Ham Member QRZ Page

    Comme la bien expliqué W8AAZ, le poids de la neige en montagne est énorme.
    UNE+Chris
     
    IW3ILM likes this.
  4. W1YW

    W1YW Ham Member QRZ Page

    Oh Jeez,

    Should I build my Marconi shack also?

    There are plenty of ways of getting acceptable bandwidth; the cage antenna is seldom used by hams because it is a large and cumbersome option.
     
    K2XT likes this.
  5. KI5DJ

    KI5DJ Ham Member QRZ Page

    Well, hey a good assessment.
     
  6. KA4DPO

    KA4DPO Platinum Subscriber Platinum Subscriber QRZ Page

    I have built a few three wire dipoles for ten meters, the wire size and spacing can pretty easily be adjusted to work with 600 ohm open wire line. The additional bandwidth is a bonus, a three wire dipole with about two foot spacing will easily cover 2 MHZ of bandwidth at 2:1 SWR on ten. The thing with cage antennas is that to realize a lot of band width at frequencies below 14 MHZ, the physical dimensions become a problem.
     
    WN1MB likes this.
  7. KC8IKW

    KC8IKW Ham Member QRZ Page

    Hello from kc8ikw Joseph Strauss I love how u made that If u can who made the rings can u send me that information thank u very much from kc8ikw Joseph Strauss as all way every one calls me Joey 73s
     
  8. KK9W

    KK9W Ham Member QRZ Page

    He went through the experiment to see what would happen and that's all he set out to do. He even said it didn't have any advantages due to being impractical but the antenna did in fact offer wider bandwidth. He took the time to satisfy his curiousity and cared enough to share the experience and the lesson. I learned something and others likely did too. Not sure why the sour attitude.
     
    KJ7RDV, W1WJ, M7SUZ and 5 others like this.
  9. W1YW

    W1YW Ham Member QRZ Page

    Not sour, just realistic. It is not unlike using spark instead of any modern mode.

    Cage antennas still see occasional use in high powered applications, but not in ham radio in anything but an anecdotal way.

    The most famous use of cage antennas is the DUGA array--very QRO.. Take a look at it on google, for example.

    73
    Chip W1YW
     
  10. KK9W

    KK9W Ham Member QRZ Page

    I agree it isn't realistic but it wasn't what he was aiming for. Only to answer a single question of bandwidth result of the design.
     
    KI5ONL likes this.

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