W. A. Cumming · 1959
This 1959 technical survey examined methods for measuring radio frequency radiation fields, focusing on three main applications: fundamental electromagnetic wave studies, antenna design, and antenna performance testing. The research catalogued measurement techniques for various RF phenomena including diffraction, scattering, transmission patterns, and radiation gain. This foundational work established standardized approaches for quantifying RF electromagnetic fields that remain relevant today.
Macherauch E, Thelen PO · 1959
This 1959 German study measured radiation exposure to radiologists' eyes during fluoroscopy procedures of the chest and stomach. The research documented occupational X-ray exposure levels that medical professionals received while performing these common diagnostic imaging procedures. This early work helped establish understanding of radiation risks in medical settings.
LT Kermit R. Meade, USCG · 1959
This 1959 study by Meade examined radio frequency radiation hazards from radar systems, focusing on safe operating distances and power density measurements around radar antennas. The research addressed growing concerns about RF exposure risks as radar technology expanded in military and civilian applications during the post-war era.
Russell L. Carpenter et al. · 1959
Researchers exposed 86 rabbit eyes to 2450 MHz microwave radiation at power densities of 0.12 to 0.40 watts per square centimeter, documenting the formation of cataracts. The study established specific thresholds for when eye damage occurs based on exposure time and power levels. This early research provided crucial evidence that microwave radiation can cause permanent eye damage.
Russell L. Carpenter et al. · 1958
Air Force-funded researchers exposed rabbit eyes to 2450 MHz microwave radiation (the same frequency used in microwave ovens) at power densities up to 0.40 watts/cm². All exposed animals developed posterior subcapsular cataracts, with researchers establishing clear thresholds for when eye damage occurs based on exposure time and power levels.
Robert T. Nieset et al. · 1957
This 1957 technical report investigated biological effects and pathological changes from microwave irradiation, focusing on human tolerance levels. The research represents early military and scientific interest in understanding how microwave radiation affects living systems. This work laid groundwork for later EMF safety standards and exposure guidelines.
S. F. Belova, Z. V. Gordon · 1956
Soviet researchers in 1956 exposed 25 rabbits to 10-centimeter microwave radiation at power levels much lower than previous studies but still far above typical workplace exposures. The study documented eye injuries in animals from this microwave exposure, adding to earlier reports of ocular damage from centimeter-wave radiation. This early research helped establish that even relatively moderate microwave power levels could cause biological harm to sensitive tissues like the eyes.
L. DAILY et al. · 1956
This 1956 study exposed dog and rabbit eyes to microwave radiation to measure temperature changes in eye tissues and identify damage. Researchers tested various power levels, distances, and exposure times on both living animals and removed eyes. The study documented how microwave energy heats eye tissues and causes pathological changes.
W. E. TOLLES, W. J. HORVATH · 1956
This 1956 technical analysis examined power densities from early microwave radar and communication systems developed during World War II. The study found that while microwave systems don't necessarily generate more total power than older radio transmitters, they can concentrate electromagnetic energy into much smaller areas through high-gain antennas and waveguides. This concentration creates significantly higher power density exposures in localized areas around microwave equipment.
Herman P. Schwan, Kam Li · 1955
This 1956 technical report by Friend, Finch, and Schwan investigated how human tissues absorb ultra-high frequency electromagnetic energy and what levels might be considered safe for exposure. The researchers examined the physical mechanisms behind tissue heating from RF energy and worked to establish tolerance dosage guidelines. This represents some of the earliest scientific work on determining safe exposure limits for electromagnetic radiation.
Robert E. Wimmer · 1954
This 1954 technical report surveyed and analyzed measurement techniques for ultra-high-frequency electromagnetic radiation dosimetry. The research examined methods for quantifying radiation exposure levels from UHF sources, which operate at frequencies between 300 MHz and 3 GHz. This work helped establish foundational measurement standards for assessing human exposure to radiofrequency radiation.
Robert E. Wimmer · 1954
This 1954 technical report by Robert Wimmer surveyed and analyzed measurement techniques for ultra-high-frequency electromagnetic fields, focusing on dosimetry methods. The research examined how to accurately measure and quantify exposure levels from UHF radiation sources. This early work helped establish foundational measurement protocols for assessing electromagnetic field exposure in the emerging age of radio frequency technology.
Cook, H.F. · 1952
This 1952 study investigated human pain thresholds for microwave and infrared radiation exposure. Researchers found that people feel burning pain at specific skin temperatures, and that pain medications like aspirin and morphine don't change the temperature threshold but do increase how much energy is needed to trigger pain.
H. F. COOK · 1952
This 1951 research investigated the pain threshold levels for both microwave and infrared radiation exposure in human subjects, measuring skin temperature responses to determine safety limits. The study represents early scientific recognition that electromagnetic radiation could cause immediate biological effects, including pain responses. This foundational work helped establish understanding of how microwave energy interacts with human tissue at levels that cause noticeable sensations.
Alfred W. Richardson et al. · 1952
This 1952 study investigated how microwave radiation causes eye damage in laboratory animals, specifically examining how factors like energy levels, pupil size, and diabetes affect cataract formation. The research explored the relationship between microwave exposure and lenticular opacities (clouding of the eye lens). This early work helped establish the connection between microwave radiation and eye damage that remains relevant today.
J. W. Clark · 1950
This 1950 study exposed laboratory animals to intense 10-centimeter microwave radiation at various power levels and distances. Researchers found that this specific wavelength caused eye damage, lens clouding, behavioral changes, increased body temperature, and death in test animals. The effects were attributed to thermal heating from radiation absorption.
Hubner · 1950
This 1950 study examined bedside ultrashort wave diathermy treatment, which used radiofrequency electromagnetic fields for therapeutic heating of body tissues. The research investigated medical applications of RF energy that operated at frequencies similar to those used in modern wireless devices. This represents early documentation of intentional human exposure to RF electromagnetic fields for therapeutic purposes.
W. W. Salisbury, John W. Clark, H. M. Hines · 1949
This 1949 study by Salisbury exposed animals to high-intensity 12-centimeter microwave radiation and discovered that dangerous heat buildup occurred beneath the skin surface without triggering normal warning signals like fever or pain. The research revealed that microwave radiation could cause internal tissue heating that the body's natural protection mechanisms couldn't detect.
Franz Nagelschmidt, M.D. · 1935
This 1935 medical research examined improved methods for applying condenser field diathermy, a therapeutic technique using short-wave radiofrequency energy to heat body tissues. The study focused on electrode placement and field application techniques for medical treatments. This represents early documentation of intentional RF exposure for therapeutic purposes.
Roffo, A. S., Jr. · 1934
This 1934 study exposed chemical dye solutions to electromagnetic waves and found they produced stronger effects on frog hearts compared to non-exposed solutions. The electromagnetic exposure enhanced the dyes' ability to disrupt heart rhythm and reduce pumping strength, with different dyes showing varying levels of impact.
A. Mirimanoff · 1927
This 1927 study examined the use of diathermy (deep heating using radiofrequency electromagnetic fields) for treating eye conditions. Diathermy was an early medical application of RF energy that generated therapeutic heat in tissue through electromagnetic field exposure. The research represents one of the earliest documented uses of radiofrequency EMF in medical practice.
Unknown authors
This confidential FCC document reveals internal testing that found multiple cell phones exceeded official SAR (radiation absorption) limits when tested at 2mm separation distance. The testing appears to have been conducted on portable handsets to evaluate compliance with federal safety standards. This suggests the FCC was aware that phones could exceed their own safety limits under certain testing conditions.
Unknown authors
This technical report examines US standards and guidelines for radiofrequency and microwave radiation exposure, including SAR (specific absorption rate) limits and power density measurements. The document appears to summarize current regulatory frameworks governing RF radiation exposure from wireless devices and infrastructure. Understanding these standards is crucial since they determine legal exposure limits for cell phones, WiFi, and other wireless technologies.
Unknown authors
This technical manual provided operational instructions for the AN/AQ-2 radar system, covering transmitter and receiver components along with pulse rate frequency settings. While focused on equipment operation rather than health effects, it documents early radar technology that exposed operators to significant electromagnetic radiation during routine use.
Unknown authors
This technical report presents measurement results for electric and magnetic field strengths in industrial settings. The study documented RF exposure levels across various workplace environments. Such measurements are crucial for establishing baseline exposure data and evaluating potential health risks from electromagnetic fields in occupational settings.
