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ultra fast spectrum monitoring

Discussion in 'Electronic Design' started by payam, Oct 21, 2003.

  1. payam

    payam Guest

    where can i find some practical circuits and idea for spectrum
    monitoring about 30G/S for a project?
    any help would be most appriciated
    thanks
     
  2. Joel Kolstad

    Joel Kolstad Guest

    Rec.radio.amateur.homebrew? There are several amateur projects out there
    for spectrum analyzers, but none of them go to 30GHz directly. However,
    often people use a low frequency spectrum analyzer and a transverter to move
    the entire spectrum down, which works fine for many purposes. The amateur
    radio guys have a band at 27GHz, so transverters from, e.g., Down East
    Microwave could probably be tweaked to instead operate around 30GHz.

    Actually building your own equipment at 30GHz is doable but rather involved;
    the wavelength is 10mm -- or under 5mm on a typical circuit board, so
    anything that you're going to consider 'lumped' is very, very tiny (0201
    resistors are great fun... and do you have a wire bonder at home?) and
    mecahanical dimension tolerances become critical. Last month at Microwave
    Update in Seattle, Paul Drexler presented a 47GHz waveguide filter where his
    mechanical tolerances had to be within half a mill (.0005") to insure good
    results!

    You might want to provide a few more details as to what you need -- how much
    bandwidth you need would be a good start.

    ---Joel Kolstad
     
  3. Frank Buss

    Frank Buss Guest

  4. steve

    steve Guest

    That is very fast.

    Have you considered using a channelizer and multiple lower speed ADC's?

    steve
     
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