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Chronic Exposure of Dogs to Microwave Radiation of 24,000 Megacycles and a Power Density of 20 mw/cm²

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William R. Deichmann, Ernesto Bernal, Frank Stephens, Karin Landeen · 1963

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Early 1963 research investigated chronic microwave exposure in dogs at power levels far exceeding modern device limits.

Plain English Summary

Summary written for general audiences

This 1963 study examined the health effects of chronic microwave radiation exposure on dogs using 24,000 MHz frequency at 20 milliwatts per square centimeter power density. The research represents early scientific investigation into biological effects of high-frequency electromagnetic fields. This work laid important groundwork for understanding how prolonged microwave exposure might affect living organisms.

Why This Matters

This 1963 research stands as a landmark in EMF health science, examining chronic microwave exposure at power densities far exceeding what we encounter from modern devices. The 20 milliwatts per square centimeter used in this study is roughly 400 times higher than typical cell phone SAR limits today. What makes this study particularly significant is its focus on chronic exposure rather than acute effects, addressing the real-world concern of long-term, low-level radiation exposure that characterizes our modern electromagnetic environment.

The 24,000 MHz frequency studied falls within the range of modern microwave ovens and some radar systems, making this early research relevant to contemporary exposure scenarios. While we don't have the specific findings from this study, the very fact that scientists were investigating chronic biological effects of microwaves in 1963 demonstrates that concerns about electromagnetic radiation's health impacts have deep scientific roots, predating our current wireless technology boom by decades.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
William R. Deichmann, Ernesto Bernal, Frank Stephens, Karin Landeen (1963). Chronic Exposure of Dogs to Microwave Radiation of 24,000 Megacycles and a Power Density of 20 mw/cm².
Show BibTeX
@article{chronic_exposure_of_dogs_to_microwave_radiation_of_24_000_megacycles_and_a_power_g7420,
  author = {William R. Deichmann and Ernesto Bernal and Frank Stephens and Karin Landeen},
  title = {Chronic Exposure of Dogs to Microwave Radiation of 24,000 Megacycles and a Power Density of 20 mw/cm²},
  year = {1963},
  
  
}

Quick Questions About This Study

The study exposed dogs to 20 milliwatts per square centimeter, which is approximately 400 times higher than typical cell phone SAR limits today. This represents extremely high-intensity microwave radiation compared to modern consumer device exposures.
The 24,000 MHz frequency used in this study is close to the 2,450 MHz used in microwave ovens and falls within ranges used by some radar systems. It's much higher than cell phone frequencies, which typically range from 700 MHz to 5 GHz.
Dogs were commonly used in 1960s radiation research because their size allowed for controlled exposure conditions and their physiology provided relevant biological responses. Large animal models like dogs were considered important for understanding potential human health effects.
This study represents early scientific recognition that chronic electromagnetic exposure warranted investigation, decades before widespread consumer wireless technology. It established precedent for studying long-term biological effects rather than just acute radiation damage.
Chronic exposure involves prolonged, repeated radiation exposure over time, mimicking real-world conditions. Acute exposure involves single, high-intensity doses. This study's chronic approach better reflects how we're exposed to electromagnetic fields in daily life.