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Thread: Ka Detection...

  1. #1
    ES13Raven
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    Default Ka Detection...

    Quote Originally Posted by RadarRoy
    KA-Band Testing
    (33.4 to 36.0 ghz). Ka-band is the newest band and it is rare to have false alerts on this band. It is also harder for radar detectors to detect police radar devices on this band.
    On every Radar Detector I have owned, the K and X range seem to be longer than Ka.

    Why is Ka so hard for detectors to detect?

  2. #2
    Yoda of Radar
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    Default Re: Ka Detection...

    Quote Originally Posted by ES13Raven
    Quote Originally Posted by RadarRoy
    KA-Band Testing
    (33.4 to 36.0 ghz). Ka-band is the newest band and it is rare to have false alerts on this band. It is also harder for radar detectors to detect police radar devices on this band.
    On every Radar Detector I have owned, the K and X range seem to be longer than Ka.

    Why is Ka so hard for detectors to detect?
    A lot of them are much lower power.....less detectability.

  3. #3
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    Ka operates on a higher frequency (centered around, what, 34.3GHz or so?), which makes it possible to have a much narrower "beam" from a small antenna. It doesn't scatter nearly as much, which is the primary reason for what you have observed.

    Though not directly related, it is also a fact that the Ka band is very wide, resulting in the need to scan a broad range of frequencies. That takes time, and may delay detection by a little bit on all bands.

    The exception is the POP frequencies of 24.125GHz (K) and 33.8GHz (part of Ka), which must be scanned at least once every 64ms since POP bursts are so brief. In theory, that takes even more scanning time away from the rest of the frequency range.

  4. #4
    ES13Raven
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    If Ka has a narrower beam and is lower power than K and X, does it have less range for the LEO?

  5. #5
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    Quote Originally Posted by ES13Raven
    If Ka has a narrower beam and is lower power than K and X, does it have less range for the LEO?
    In most cases, Ka police radar actually is higher power than comparable K-Band units, so I don;t think they'll have much trouble with range.

  6. #6
    ES13Raven
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    Quote Originally Posted by jimbonzzz
    In most cases, Ka police radar actually is higher power than comparable K-Band units, so I don;t think they'll have much trouble with range.
    Hmmm...

    So is the narrower beam true Jim?

    And why do you think it is harder to detect?

  7. #7
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    Quote Originally Posted by ES13Raven
    Quote Originally Posted by jimbonzzz
    In most cases, Ka police radar actually is higher power than comparable K-Band units, so I don;t think they'll have much trouble with range.
    Hmmm...

    So is the narrower beam true Jim?

    And why do you think it is harder to detect?
    Brick pretty much nailed it...
    With Ka, they are able to get more gain and a narrower beam using a smaller antenna. Usually, K-Band units are in the neighborhood of 15 degree beamwidth, while Ka units commonly have less than 10 degrees.

  8. #8
    ES13Raven
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    Quote Originally Posted by jimbonzzz
    With Ka, they are able to get more gain and a narrower beam using a smaller antenna. Usually, K-Band units are in the neighborhood of 15 degree beamwidth, while Ka units commonly have less than 10 degrees.
    Hmmm...

    You would think that Ka would be detected farther in all the straightaway flat desert tests then.

  9. #9
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    The shorter the wavelength (higher frequency) the greater the freespace attenuation of the signal will be.

    Ed

  10. #10
    Yoda of Radar
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    Quote Originally Posted by edweird
    The shorter the wavelength (higher frequency) the greater the freespace attenuation of the signal will be.

    Ed
    Think of shortwave radio compared to FM... yeah I know about the reflections but still!

 

 

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