A high Q piezoelectric resonator as a portable VLF transmitter

Discussion in 'General Announcements' started by W5KUL, Nov 7, 2019.

ad: L-HROutlet
ad: l-rl
ad: Left-3
ad: L-MFJ
ad: MessiPaoloni-1
ad: Left-2
ad: Subscribe
  1. W5KUL

    W5KUL Ham Member QRZ Page

    Some new research on using Lithium Niobate rods via the piezoelectric effect as a short transmitting antenna for VLF/ELF/ULF frequencies. The nature article below points out the Shannon–Hartley limitations on bit-rate at VLF can be overcome - meaning that larger amounts of data can be transmitted than with conventional antennas at these frequencies as the antenna is directly modulated mechanically.

    Interesting read!

    From the Journal Nature (Nature Communications)
    https://www.nature.com/articles/s41467-019-09680-2

    A simplified explanation
    https://www6.slac.stanford.edu/news...-antenna-communicating-where-radios-fail.aspx
     
  2. WL7PM

    WL7PM Ham Member QRZ Page

    Build the piezo crystals into a mechanical "sounder" key, you'd have a NON-Electronic radio transmitter.
    No batteries required.
    A hammer ,a crystal and a ground rod... On the air.
     

Share This Page