What is radio frequency radiation RF radiation that is radio waves, is the frequency in 100kHz ~ 300GHz, wavelength in 1mm ~ 3km of electromagnetic waves, belongs to the electromagnetic radiation in the smaller energy, wavelength of longer frequency band. RF radiation is divided into high-frequency electromagnetic field and microwave according to the wavelength, high-frequency electromagnetic field frequency between 100kHz ~ 300MHz, wavelength greater than 1m; microwave is the frequency of electromagnetic waves from 300MHz ~ 300GHz, wavelength less than 1m. Which cases can be exposed to radio frequency radiation The human body may be exposed to radio frequency radiation is mainly in the case of radio frequency radiation is used in various aspects of production and life, the application of radio frequency radiation mainly in the following areas. 1, high-frequency induction: high-frequency induction is mainly the application of high-frequency heat treatment, including welding, metal smelting, metal heat treatment, semiconductor material processing and purification, etc. 2, high-frequency medium heating: mainly including the heat of plastic products, wood, cotton drying, rubber vulcanization, as well as high-frequency heat treatment of crop seeds. 3, the application of microwave: microwave is used in the daily life of residents, industrial production and defense and military and other aspects, including food processing, cooking, television, detection, communications, radar navigation, nuclear physics scientific research. When people approach and use the above-mentioned application of radio frequency radiation work instrument may be exposed to radio frequency radiation. The impact of radio frequency radiation on the human body The impact of radio frequency radiation on the human body is mainly thermal and non-thermal effects of two aspects. Thermal effect is that a certain intensity of radiation exposure to biological tissues for a certain period of time, will lead to local or general body temperature increase in human tissue, the result may damage the human organs and tissues. This is the effect of radiofrequency radiation may lead to more serious radiation damage, which may cause male hypogonadism, reduced sperm quality or dead sperm. Non-thermal effect is that is not enough to cause the body to produce heat and health effects, including radiation on the human nervous system and endocrine system, radiation on biological membranes direct effect. Non-thermal effects may cause a person to feel weak, sleep disorders, memory loss, emotional instability, excessive sweating, hair loss, weight loss, etc.. It may also affect vegetative nerve function, resulting in slowed or tachycardic heart rate, decreased or increased blood pressure, precordial pain, and chest tightness. Women may experience menstrual cycle disorders due to non-thermal effects. The non-thermal effects of microwave radiation may also cause a decrease in the total number of blood white blood cells, and clouding of the lens of the eye in the form of dots or small pieces. Anti-radiofrequency radiation radiation prevention methods Contact with large intensity radiofrequency radiation is mainly the use of radiofrequency radiation for production operations of front-line operators, for which the main methods of anti-radiofrequency radiation are: 1, shielding radiation sources. The use of possible methods to limit electromagnetic energy in the specified space, to stop the spread of diffusion. Generally simple methods have the use of grounded copper wire mesh isolation shielding. This is similar to the principle of radiation protection clothing, that is, the use of metal absorption and reflection, grounding is to avoid shielding network to become a secondary source of radiation. 2, as far as possible from the source of radiation. When shielding is difficult, the operator can use automatic or semi-automatic remote operation; set up clear signs around the radiation source, prohibit the approach of unrelated personnel; and according to the microwave emission has the characteristics of directional, close to the radiation source of personnel should choose the part of the radiation intensity is the smallest, avoid approaching from the radiation front. 3, the implementation of standardized occupational health standards. China’s “high-frequency radiation health standards” on the electric field strength and magnetic field strength respectively: high-frequency radiation (frequency 100 kHz to 30 MHz) electric field strength of 20 volts / m, magnetic field strength of 5 A / m. The Ministry of Electronics promulgated the “microwave radiation interim health standards” stipulate: 8 hours a day, continuous radiation intensity should not exceed 38 microwatts / cm2; the total dose of a day should not exceed 300 microwatts / cm2; not allowed to work in more than 5 milliwatts / cm2 radiation environment. 4.Take personal protective measures. When necessary, personnel close to the radiation source should wear special protective clothing and glasses.