HFU HF Underground
General Category => General Radio Discussion => Topic started by: ChrisSmolinski on September 05, 2018, 1830 UTC
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If the knob lovers thought SDR was bad, they won't like this:
Using a laser to detect the effect of radio waves on certain atoms is the basis for a new kind of antenna that resists interference and can receive a wider range of signals.
https://www.technologyreview.com/s/611977/get-ready-for-atomic-radio/
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Among its advantages over conventional antennas is the huge range of signals it can detect—over four octaves from the C band to the Q band, or wavelengths from 2.5 to 15 centimeters.
Don't plan on this working on 43 meters as described in this article. :D Photodiode detectors don't work well there. However, I guess you could upconvert (mix up in frequency) but then some of the benefits like "interference immunity" would be lost.
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For example, its dynamic range is a little less than usually expected over radio.
They definitely need to refine this so C-QUAM can be used to its fullest enjoyment.
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They definitely need to refine this so C-QUAM can be used to its fullest enjoyment.
Agreed. With GHz of bandwidth available to them, I'd plan on using C-QUAM too. ;)
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The antenna is apparently a 'vapor cell' 2 cm in size, according to a PDF I read somewhere.