Biological Effects of Radiofrequency Electromagnetic Field

  title={Biological Effects of Radiofrequency Electromagnetic Field},
  author={Henry C. Lai},
Radiofrequency electromagnetic field=radiation (RFR) covers a large segment of the electromagnetic spectrum and falls within the nonionizing bands. Its frequency ranges between 3KHz and 300GHz. Cellular phones, wireless transmission towers for radio, TV, and telecommunication, radar and many other applications emit RFR. Different frequencies of RFR are used in different applications. For example, the frequency range of 540–1600KHz is used in AM radio transmission, while 76–108MHz is used for FM… 

Main Regularities and Health Risks from Exposure to Non-Thermal Microwaves of Mobile Communication

  • I. Belyaev
  • Physics
    2019 14th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)
  • 2019
Various responses to non-thermal microwaves (MW) from mobile communication including adverse health effects related to electrohypersensitivity, cancer risks, neurological effects, and reproductive

Exclusion Zones Close to Wireless Communication Transmitters Aiming to Reduce Human Health Risks

Owing to the uncertainty in science regarding the minimum non ionizing radiation level below which no adverse health effects can occur, the Precautionary Approach is suggested and it is recommended that EMF human exposure be kept to a minimum.

Short-duration exposure to radiofrequency electromagnetic radiation alters the chlorophyll fluorescence of duckweeds (Lemna minor)

Investigating the chlorophyll fluorescence parameters of duckweed fronds indicated that exposure to EMR causes a change in the non-photochemical quenching of the duckweeds, which confirms that the effect is non-thermal.

Reaction of the immune system to low-level RF/MW exposures.

Electromagnetic Absorption in the Head of Adults and Children Due to Mobile Phone Operation Close to the Head

It is shown that under similar conditions, the 1g-SAR calculated for children is higher than that for the adults when using the 10-year old child model, and the SAR values higher than 60% than those for adults are obtained.

Setting Prudent Public Health Policy for Electromagnetic Field Exposures

Because of ubiquitous exposure, the rapidly expanding development of new EMF technologies and the long latency for the development of such serious diseases as brain cancers, the failure to take immediate action risks epidemics of potentially fatal diseases in the future.

Effect of Electromagnetic Radiation fromMobile Phone Base Stations on the Number of Breeding House Sparrows ( Passer domesticus )

A possible effect of long-term exposure to low-intensity electromagnetic radiation from mobile phone (GSM) base stations on the number of House Sparrows during the breeding season was studied in six

A Possible Effect of Electromagnetic Radiation from Mobile Phone Base Stations on the Number of Breeding House Sparrows (Passer domesticus)

The data show that fewer House Sparrow males were seen at locations with relatively high electric field strength values of GSM base stations and therefore support the notion that long-term exposure to higher levels of radiation negatively affects the abundance or behavior of House Sparrows in the wild.

Effect of Exposure to a Radiofrequency Electromagnetic Field on Body Temperature in Anesthetized and Non‐Anesthetized Rats

Anesthesia and body mass influenced RF exposure‐induced changes in the body temperature of rats, and three of the five 339 g anesthetized and exposed rats died after 6 h of RF exposure.

Non-thermal Biological Effects of Microwaves

The aim of this paper is to overview the diverse biological effects of non-thermal microwaves (NT MWs) and complex dependence of these effects on various physical and biological parameters. Besides



Specific absorption rate levels measured in a phantom head exposed to radio frequency transmissions from analog hand-held mobile phones.

Electric fields (E-fields) induced within a phantom head from exposure to three different advanced mobile phone system (AMPS) hand-held telephones were measured using an implantable E-field probe to determine the specific absorption rate (SAR) which varied significantly between phone models and antenna configuration.

Nonionizing electromagnetic wave effects in biological materials and systems

Electromagnetic waves from the lower radio frequencies up through the optical spectrum can generate a myriad of effects and responses in biological specimens. Some of these effects can be harmful to

Cellular phone electromagnetic field effects on bioelectric activity of human brain.

A significant increase of global correlation dimension during the exposure and afterexposure period was discovered, more pronounced in the case of "eyes closed", which can be viewed as the manifestation of cortex activation under phone EMF exposure.

Nerve cell damage in mammalian brain after exposure to microwaves from GSM mobile phones.

Highly significant evidence for neuronal damage in the cortex, hippocampus, and basal ganglia in the brains of exposed rats is found.

Specific absorption rate in rats exposed to 2,450-MHz microwaves under seven exposure conditions.

Dosimetry studies for seven different exposure conditions to determine whether these different results could be due to the rats having been exposed differently and local SARs in the brain varied for different Exposure conditions are presented.

Effects of modulated RF energy on the EEG of mammalian brains

The effects of modulated radio frequency fields on mammalian EEGs were investigated using acute and chronic irradiations at non-thermal level to produce a change in EEG patterns by enhancing the low frequency components and decreasing high frequency activities.

Computation of high-resolution SAR distributions in a head due to a radiating dipole antenna representing a hand-held mobile phone.

For strongly inhomogeneous regions high-resolution SAR modelling is an absolute necessity, and low-resolution dielectric geometries may suffer from loss of anatomical detail, which greatly affects small-scale SAR distributions.

Induction of calcium-ion efflux from brain tissue by radio-frequency radiation: Effects of modulation frequency and field strength

Bawin and her coworkers have reported changes in binding of calcium after exposure of avian brain tissue to nonionizing electromagnetic radiation. Because calcium is intimately involved in the

Auditory perception of radio‐frequency electromagnetic fields

Absorption of pulsed microwave energy can produce an auditory sensation in human beings with normal hearing. The phenomenon manifests itself as a clicking, buzzing, or hissing sound depending on the

Comparison of numerical and experimental methods for determination of SAR and radiation patterns of handheld wireless telephones.

Automated SAR and radiation pattern measurement systems were used to validate both the calculated 1-g SARs and radiation patterns for several telephones, including some research test samples, using a variety of antennas.