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The Jim Creek Naval Radio Station in Washington state and the Lualualei very low frequency transmitter in Hawaii would likely be top targets in this respect. Russian ballistic missiles would ...

THE signals from a very-low-frequency transmitter such as GBR (Rugby) operating at a frequency of 16 kc./s. are normally propagated beyond the range of the ground ray by reflexion between the D ...

To make up for that he built a small transmitter that generates the ... Part of the reason why range is so limited is that very low frequency (VLF) radios typically require enormous antennas ...

on which the very low frequency (VLF, 3–30 kHz) wave propagation depends. Therefore, the amplitude and phase of the VLF signal transmitted through the waveguide will be abnormal. In this article, ...

Narrow-band VLF transmitter waves originate from the powerful ground-based VLF transmitters for submarine communications, which are typically over the frequency ... from low-Earth orbit satellite ...

Very low frequency and Extremely Low Frequency radio ... They’ve developed a piezoelectric transmitter for very long wavelengths. Instead of pushing pixies through an antenna, this antenna ...

to very-low frequency (VLF) are ideal for communication in underwater and underground environments. However, large antenna structures are often needed for high efficiency and bandwidth. We ...