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UHF TV Y-splitter

Discussion in 'Electronic Design' started by Dave Farrance, Oct 23, 2003.

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  1. Since y-splitters for UHF TV aerial leads were selling at £1.50 in a
    local cut-price shop, I broke one open to see what's inside.

    15kbyte JPEG:
    http://anvil.pwp.blueyonder.co.uk/splitter.jpg

    Doesn't that have a mismatched half-impedance input? Or am I
    misunderstanding something, here?

    Can anyone recommend a website that describes RF y-splitters and RF
    combiners?
     
  2. Gary Tait

    Gary Tait Guest

    Whereas On Thu, 23 Oct 2003 15:31:04 GMT, Dave Farrance
    You have the circuit drawiang incorrect. The one output is out of
    phase with the other.
     
  3. Not really. The core ensures that the current is evenly distributed
    between the two outputs. The black dots on the circuit diagram show the
    polarity of the windings, and that's how the core is wound.
     
  4. maxfoo

    maxfoo Guest

    Looks like a LC wilkinson power divider. download rfsim99.exe it lets
    you design them.
     
  5. It's an interesting program but this circuit breaks its simulator. It
    returns an output magnitude of zero.

    I think that the transformer model does not handle the fact that
    opposing currents applied to matched windings should meet almost no
    impedance.
     
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