skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Active Field Cancellation to Prevent Saturation in Ferromagnetic-Core Loop Antennas

Abstract

Ferromagnetic-core loop antennas with high-permeability core materials are typically used in size-constrained applications requiring the detection and reception of weak very low frequency and extremely low frequency signals. However, high-permeability materials are susceptible to saturation in the presence of strong magnetic fields such as those generated by power lines, in research laboratories, or through natural phenomena. Here, a system is presented that actively controls the magnetic flux in the core of the antenna by applying a control signal to an independent set of windings on the same core. This control signal is phase locked to the offending signal and the two signals destructively combine in the core. Our results show that it is possible to actively cancel the fundamental component of a strong interferer in the core of a high sensitivity ferromagnetic-core loop antenna and prevent core saturation. This approach eliminates signal distortion caused by magnetic saturation that passive signal cancellation or signal processing in the receiver do not. Furthermore, high-sensitivity ferromagnetic-core antennas can be used in applications where they were previously thought unsuitable.

Authors:
ORCiD logo [1]; ORCiD logo [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Tennessee Technological Univ., Cookeville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1468239
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
IEEE Transactions on Electromagnetic Compatibility
Additional Journal Information:
Journal Volume: 60; Journal Issue: 6; Journal ID: ISSN 0018-9375
Publisher:
IEEE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; active noise reduction; antennas; ferrites; interference cancellation; low-frequency noise; magnetic hysteresis; receiving antennas; saturation magnetization

Citation Formats

Huey, Benjamin E., and Anderson, Adam L. Active Field Cancellation to Prevent Saturation in Ferromagnetic-Core Loop Antennas. United States: N. p., 2018. Web. doi:10.1109/TEMC.2018.2803120.
Huey, Benjamin E., & Anderson, Adam L. Active Field Cancellation to Prevent Saturation in Ferromagnetic-Core Loop Antennas. United States. doi:10.1109/TEMC.2018.2803120.
Huey, Benjamin E., and Anderson, Adam L. Wed . "Active Field Cancellation to Prevent Saturation in Ferromagnetic-Core Loop Antennas". United States. doi:10.1109/TEMC.2018.2803120. https://www.osti.gov/servlets/purl/1468239.
@article{osti_1468239,
title = {Active Field Cancellation to Prevent Saturation in Ferromagnetic-Core Loop Antennas},
author = {Huey, Benjamin E. and Anderson, Adam L.},
abstractNote = {Ferromagnetic-core loop antennas with high-permeability core materials are typically used in size-constrained applications requiring the detection and reception of weak very low frequency and extremely low frequency signals. However, high-permeability materials are susceptible to saturation in the presence of strong magnetic fields such as those generated by power lines, in research laboratories, or through natural phenomena. Here, a system is presented that actively controls the magnetic flux in the core of the antenna by applying a control signal to an independent set of windings on the same core. This control signal is phase locked to the offending signal and the two signals destructively combine in the core. Our results show that it is possible to actively cancel the fundamental component of a strong interferer in the core of a high sensitivity ferromagnetic-core loop antenna and prevent core saturation. This approach eliminates signal distortion caused by magnetic saturation that passive signal cancellation or signal processing in the receiver do not. Furthermore, high-sensitivity ferromagnetic-core antennas can be used in applications where they were previously thought unsuitable.},
doi = {10.1109/TEMC.2018.2803120},
journal = {IEEE Transactions on Electromagnetic Compatibility},
issn = {0018-9375},
number = 6,
volume = 60,
place = {United States},
year = {2018},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share: