“My hat is has three corners ..” Three elements vertical array . Anyone?

Discussion in 'Antennas, Feedlines, Towers & Rotors' started by AA7EJ, Oct 5, 2013.

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  1. AA7EJ

    AA7EJ Ham Member QRZ Page

    There are interesting articles on “four square” vertical arrays with practically continuous steering of such array using variety of methods.
    I would be interested if anybody ever tried to implement such steerable array using only three verticals.
    73 Vaclav
  2. N0SYA

    N0SYA Ham Member QRZ Page

    Many years ago, the Super Scanner Antenna M-119 by Antenna Specialists was a very popular antenna for 11 meter use. It was designed as a "compromise" antenna with the properties that made it into an antenna that was somewhere between a beam and a ground plane type antenna. The "beam" property of the Super Scanner was the result of electronically rotating the pattern rather than using a rotor.
    The omni directional property and "beam" effect was designed into the controls and phasing, enabling the antenna to be used as a "beam" (sort of), or it could be "switched" into the omni directional pattern.

  3. AA7EJ

    AA7EJ Ham Member QRZ Page

    Thanks, exactly what I was looking for.
    I'll put it into model to get some numbers to analyze. I'll will start with 28 MHz Super Scanner 1/2 wave dipoles and than go for 1/4 wave. Should be interesting.
    73 Vaclav
  4. KO6WB

    KO6WB Premium Subscriber QRZ Page

    If you are an ARRL member you can look up a phased array that uses 4 and later 3 elements.
    It's steerable for a full 360 degrees and can handle legal power when properly built.
    Look up the April 1976 issue of QST page 27-30. It's also in the 1978 edition of the ARRL's Antenna Anthology.
    The dimensions are for an 80 meter setup but with scaling it can be made for any band.
    Hope this helps
  5. IZ3NYT

    IZ3NYT Ham Member QRZ Page

    I think I understand, you're trying to build
    "System Adcock" is similar to the system bellini antenna, are similar to 2 Deltaloop crossed, it is a great antenna for radio direction finding.
    73 de Andrew
  6. AA7EJ

    AA7EJ Ham Member QRZ Page

    Thanks Andrew.
    I checked the Bellini, using Google translator HI HI HI. Can you clarify that the "pickup" coil is mechanically rotated? It is not that clear to me. I suppose it can be "rotated" electronically - similar to some "four corners" controls.

    Here is a offshoot of the Adcock antenna, with an interesting remark - "simple dipoles in this setup are better than full loop"

    http://www.w8ji.com/Goniometer adcock antenna.htm

    I am basically looking for reasonable / portable / wire / no rotator / experimental antenna with an exceptional front to back ratio.
    Maybe even constructed as "stripline antenna" for GHz frequencies , but later, after I get some experience on HF first.
    73 Vaclav

    Gary, I am sure I can manage to get a copy of the article, thanks.
  7. N0SYA

    N0SYA Ham Member QRZ Page

    It'd be neat to speriment with some of those cheap (relatively speaking) 43f verticals as phased array. Mebbe you could use it on multiple bands rather than just 10m like in my first post. I got to use one of those 11m arrays and it worked a treat, the only moving part was the knob in the control box from what I recall but being for a single band sure makes the design easier.
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