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Title: Narrowband high temperature superconducting receiver for low frequency radio waves

Abstract

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.

Inventors:
 [1]
  1. Los Alamos, NM
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
873872
Patent Number(s):
US 6263189
Assignee:
Regents of University of California (Los Alamos, NM)
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
narrowband; temperature; superconducting; receiver; frequency; radio; waves; underground; communicating; device; low-noise; squid; superconductor; components; connected; detect; modulated; external; magnetic; flux; outputting; voltage; signal; spectrum; related; varying; narrow; bandwidth; filter; select; portion; relatively; free; power; line; noise; output; operating; electromagnetic; spectra; exists; demodulator; outputs; communication; fm; indicative; modulation; narrow bandwidth; power line; voltage signal; temperature superconductor; magnetic flux; output signal; temperature superconducting; narrow band; external magnetic; radio waves; relatively free; components connected; superconductor component; communication signal; low-noise squid; /455/324/

Citation Formats

Reagor, David W. Narrowband high temperature superconducting receiver for low frequency radio waves. United States: N. p., 2001. Web.
Reagor, David W. Narrowband high temperature superconducting receiver for low frequency radio waves. United States.
Reagor, David W. Mon . "Narrowband high temperature superconducting receiver for low frequency radio waves". United States. https://www.osti.gov/servlets/purl/873872.
@article{osti_873872,
title = {Narrowband high temperature superconducting receiver for low frequency radio waves},
author = {Reagor, David W},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/873872}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

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Works referenced in this record:

Superconducting Extremely Low Frequency (ELF) Magnetic Field Sensors for Submarine Communications
journal, April 1974