Microfabricated sensors for the measurement of electromagnetic fields in biological tissues

James Monberg; Albert K. Henning

doi:10.1117/12.221162

15 September 1995 Microfabricated sensors for the measurement of electromagnetic fields in biological tissues

James Monberg, Albert K. Henning

Proceedings Volume 2642, Micromachined Devices and Components; (1995) https://doi.org/10.1117/12.221162
Event: Micromachining and Microfabrication, 1995, Austin, TX, United States

Abstract

Public awareness of the risks of exposure to electromagnetic radiation has grown over the past ten yeras. The effects of power lines on human and animal health have drawn particular attention. Some longitudinal studies of cancer rates near power lines show a significant correlation, while others show a null result. The studies have suffered from inadequate sensors for the measurement of electromagnetic radiation in vivo. In this work, we describe the design, construction, and testing of electrically passive, microfabricated single-pole antennas and coils. These sensors will be used in vivo to study the effects of electromagnetic radiation on animals. Our testing to date has been limited to in vitro studies of the magnetic field probes. Magnetic field pickup coils were fabricated with up to 100 turns, over a length of up to 1000 micrometers . Measurements were carried out with the sensors in air, and in water of various saline concentrations. Magnetic fields were applied using a Helmholtz coil. Both dc and ac fields were applied. The results indicate that small-area measurements of electromagnetic fields in vitro can be made successfully, provided adequate shielding and amplification are used.

Citation Download Citation

James Monberg and Albert K. Henning "Microfabricated sensors for the measurement of electromagnetic fields in biological tissues", Proc. SPIE 2642, Micromachined Devices and Components, (15 September 1995); https://doi.org/10.1117/12.221162

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