Narrowband high temperature superconducting receiver for low frequency radio waves
Patent
·
OSTI ID:873872
- Los Alamos, NM
An underground communicating device has a low-noise SQUID using high temperature superconductor components connected to detect a modulated external magnetic flux for outputting a voltage signal spectrum that is related to the varying magnetic flux. A narrow bandwidth filter may be used to select a portion of the voltage signal spectrum that is relatively free of power line noise to output a relatively low noise output signal when operating in a portion of the electromagnetic spectra where such power line noise exists. A demodulator outputs a communication signal, which may be an FM signal, indicative of a modulation on the modulated external magnetic flux.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM
- DOE Contract Number:
- W-7405-ENG-36
- Assignee:
- Regents of University of California (Los Alamos, NM)
- Patent Number(s):
- US 6263189
- OSTI ID:
- 873872
- Country of Publication:
- United States
- Language:
- English
Superconducting Extremely Low Frequency (ELF) Magnetic Field Sensors for Submarine Communications
|
journal | April 1974 |
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