Kanzius’ concept is simple: expose salt water to 13.56 MHz radio waves and light a match. Hydrogen separates from the water mixture and burns for as long as it’s exposed to the frequency.
When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of middle D♭ (or D♭4) is approximately 277.183 Hz. See pitch (music) for a discussion of historical variations in frequency.
5G will use spectrum in the existing LTE frequency range (600 MHz to 6 GHz) and also in millimeter wave bands (24–86 GHz).
