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Hazards of Microwave Radiations - A Review

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Authors not listed · 1960

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Scientists were documenting microwave radiation health hazards in 1960, decades before WiFi and smartphones became ubiquitous.

Plain English Summary

Summary written for general audiences

This 1960 review examined the health hazards of microwave radiation exposure, focusing on occupational risks from radar systems and medical diathermy equipment. The study analyzed both thermal effects (tissue heating) and potential non-thermal biological impacts of microwave frequencies. This early research helped establish the foundation for understanding microwave radiation's effects on human health.

Why This Matters

This 1960 review represents a pivotal moment in EMF health research, appearing just as radar technology was proliferating after World War II and medical diathermy was becoming common. The science demonstrates that concerns about microwave radiation aren't new or fringe - they were being documented by mainstream researchers over six decades ago. What this means for you is that today's microwave exposures from WiFi routers, cell phones, and smart meters operate at similar frequencies to those flagged for health concerns in 1960, yet our daily exposure levels have increased exponentially. The reality is that while this early research focused primarily on occupational exposures to high-power radar and medical equipment, we now carry microwave-emitting devices in our pockets and homes. The biological mechanisms identified in this foundational work - both thermal heating and non-thermal cellular effects - remain relevant to understanding how today's chronic, low-level microwave exposures might affect our health.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 1-30 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 1-30 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study.

Study Details

All tissues of the body are not equally equipped for heat dissipation and temperature regulation. The lens of the eye and hollow viscera, such as gallbladder, urinary bladder, and parts of the gastrointestinal tract, for example, are comparatively avascular and largely devoid of effective temperature regulating mechanisms. It is reasonable to expect that such organs will suffer relatively larger temperature rises and will be more liable to injury by microwave irradiation than other body organs. Experiments have, in fact, shown that severe and injurious temperature increases occur in these organs under microwave irradiations accompanied by only slight increases in rectal and oral temperature. It is not clear whether all biologic effects of microwaves can be attributed solely to temperature increases that result from energy absorption, or whether these effects are produced in part by mechanisms other than simple thermal elevation. Hines and Randall were unable to find any crucial experimental evidence for biologic effects unrelated to temperature change. It should be pointed out, however, that at this time it is impossible to rule out completely the possibility of athermal effects of microwaves.

Cite This Study
Unknown (1960). Hazards of Microwave Radiations - A Review.
Show BibTeX
@article{hazards_of_microwave_radiations_a_review_g7324,
  author = {Unknown},
  title = {Hazards of Microwave Radiations - A Review},
  year = {1960},
  
  
}
No DOI on file for this study.

Quick Questions About This Study

This 1960 review focused on radar systems and medical diathermy equipment, which were the primary sources of microwave radiation exposure at the time. These high-power occupational sources operated at frequencies similar to today's consumer wireless devices.
Yes, this review examined both thermal effects (tissue heating from microwave energy) and potential non-thermal biological impacts. This dual focus established early recognition that microwave radiation could affect biology through multiple mechanisms beyond just heating.
While 1960s research focused on high-power occupational exposures, today's consumer devices like WiFi and cell phones operate at similar microwave frequencies but at lower power levels with much more widespread, chronic exposure patterns.
Radar operators and medical technicians using diathermy equipment faced direct, high-intensity microwave exposures during their work shifts. Understanding these occupational hazards was crucial for establishing early workplace safety standards and exposure limits.
This review helped establish the scientific foundation for microwave radiation health research, documenting biological effects that would later become relevant as microwave-emitting consumer technologies like cell phones and WiFi systems became widespread decades later.