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Thread: Phased dipoles

  1. #1
    Orca Whisperer
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    Phased dipoles

    Question, If I have two dipoles, one N-S, and the other E-W, and have them fed out of phase 180*, will I get essentially an omni-vertical antenna (As far as signal strength pattern)?

    Would there be any benefit to this?

    Also, what does the signal pattern look like on a vertical dipole? Same as a horizontal dipole?

    I know the first thing is: Model it! I suck hard at eznec. Can never get the wires to line up right.
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  2. #2
    Whacker Knot WØTKX's Avatar
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    How aboooooot a "maypole" antenna... http://www.qso.com/westsat/Maypole/index.html
    "Where would we be without the agitators of the world to attach the electrodes
    of knowledge to the nipples of ignorance?" ~ Professor "Dick" Soloman



  3. #3
    Conch Master W5GA's Avatar
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    Quote Originally Posted by KC2UGV View Post
    Question, If I have two dipoles, one N-S, and the other E-W, and have them fed out of phase 180*, will I get essentially an omni-vertical antenna (As far as signal strength pattern)?

    Would there be any benefit to this?

    Also, what does the signal pattern look like on a vertical dipole? Same as a horizontal dipole?

    I know the first thing is: Model it! I suck hard at eznec. Can never get the wires to line up right.
    What freq? The patterns I see in EZNEC aren't even close. If you talking 40, 80 or 160 it's really moot, as the majority of radiation is up (not so much on 40) unless you have LOTS of tower to play with. The null off the ends a dipole aren't really that great if it's low.
    The ARRL Antenna Book comes with basic version of EZNEC with a ton of canned examples you can look at, although in my version they're for 80m. EZNEC will rescale them automatically for you though if you tell it what freq you want.
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  4. #4
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    Quote Originally Posted by W5GA View Post
    What freq? The patterns I see in EZNEC aren't even close. If you talking 40, 80 or 160 it's really moot, as the majority of radiation is up (not so much on 40) unless you have LOTS of tower to play with. The null off the ends a dipole aren't really that great if it's low.
    The ARRL Antenna Book comes with basic version of EZNEC with a ton of canned examples you can look at, although in my version they're for 80m. EZNEC will rescale them automatically for you though if you tell it what freq you want.
    Ok, well stupid favor to ask: Can you send me your models (Just the two, a phased dipole and a vertical)?
    Big Giant Meteor 2020 - We need to make Earth Great Again

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  5. #5
    Conch Master W5GA's Avatar
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    Be happy to. Shoot me your email.
    When the government's boot is on your throat, whether it is a left boot or a right boot is of no consequence. — GARY LLOYD

    The nation we live in is the nation we have built by design, each successive generation raising the wall of tyranny a little higher. - Chris Griffin

  6. #6
    Administrator N8YX's Avatar
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    If you feed a pair of crossed dipoles 90 degrees out of phase you'll get an omni pattern.

    See here:

    http://en.wikipedia.org/wiki/Turnstile_antenna
    "Everyone wants to be an AM Gangsta until it's time to start doing AM Gangsta shit."

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