4 ms·
Pretty big win for RF. Peak sensitivity -145 dBm/Hz. Little bit of a stretch to say entire RF spectrum, but 0 -> 20 GHz is still really cool.
by tyler3991 6y ago
Pretty big win for RF. Peak sensitivity -145 dBm/Hz. Little bit of a stretch to say entire RF spectrum, but 0 -> 20 GHz is still really cool.
- Animats 6y agoRight. If it went into the terahertz range, it would help open up that area. 5G cell phones go higher than 20GHz than that.
- jacquesm 6y agoEven so, this is pretty impressive, not all that long ago this device would be SF and people would doubt it would ever exist.
- Animats 6y agoNot that long ago, the radios in a cell phone would be SF.
- TheSpiceIsLife 6y agoIndeed! The antenna in mobile phones perform well across a wide range of frequencies due to being fractals! https://en.wikipedia.org/wiki/Fractal_antenna https://en.wikipedia.org/wiki/Fractal_antenna
- baybal2 6y agoNo, it does so because of solid state tuners, and RF switches.
- TheSpiceIsLife 6y agoThe article I linked claims: A fractal antenna's response differs markedly from traditional antenna designs, in that it is capable of operating with good-to-excellent performance at many different frequencies simultaneously. Is this inaccurate? The associated electronics are obviously necessary too.
- madengr 6y agoFractal antennas are mostly snake oil. You’ll always see then driven against a large counterpoise (ground plane), as the counterpoise becomes the radiator. You can make use of Chu’s limit without resorting to fractals. https://en.m.wikipedia.org/wiki/Chu–Harrington_limit https://en.m.wikipedia.org/wiki/Chu–Harrington_limit
- pmayrgundter 6y agoApparently the same lab has done related work into the THz range: "In March 2020, the laboratory announced that its scientists analysed the Rydberg sensor's sensitivity to oscillating electric fields over an enormous range of frequencies—from 0 to 10^12 Hertz" https://en.m.wikipedia.org/wiki/Rydberg_atom https://en.m.wikipedia.org/wiki/Rydberg_atom