The intelligent management system of cell phone jammer is the new-type digitization system

When electromagnetic radiation shielding from the air when fired, the use of metallic conductors on the effects of electromagnetic radiation reflection and absorption of electromagnetic radiation effects to achieve the purpose, in the shield occurs on the first interface reflection and transmission through the shielding of electromagnetic waves into layer thickness of the shield will be absorbed as part of, and the second interface and the reflection and transmission, from the Maxwell equations and boundary conditions derived above results, obtained both reflection loss and absorption loss of Total wear and tear.The intelligent management system of  china cell phone jammer can effectively solve the above problems. Total loss where fm - projected wave frequency (MHZ) - shielding material relative permeability (for some magnetic materials = 1) - The relative conductivity shielding materials (copper = 1) S - the shield thickness (mil 1 mil = 0.03mm) K - coefficient of the general formula K = 3.34 or more conditions for the vertical projection to the plane wave shield on. The intelligent management system of  cell phone jammer is the branch of the wireless information detecting and shielding system.Based on the basic principles of electromagnetic shielding is the use of the shield in the induced current role in the actual project is not allowed in the direction perpendicular to the current open seam, cut off because of this gap the induced current path, undermining the role of reflection induction, resulting in the shielding effect is extremely small, even to zero, while the shield (in particular the composition of the shield metal plate) on the existence of holes and cracks if, when a current is passed from the surrounding, the effect must have wireless, it will also lead to shielding effect of the decline.The intelligent management system of    cell phone jammer    is the new-type digitization system specifically made for the modernization management of the prison. If you use copper as shielding material, the type can be obtained from the thickness of 10 mils or 0.3MM enough. Third, the calculation of the attenuation of the surface of the reflector shield and shielding material attenuation is not only the surface impedance ηs, but also with the wave impedance of the shield to the radiation source size and distance related. The detecting network can be formed in the area to be shielded through the specific network mode of   cell phone jammer   intelligent management system.One wave impedance and the radiation source size and type (electric or magnetic) for different radiation generated in the shield on the reflection attenuation R is: For low-impedance source (the magnetic field source) said earlier, reflection attenuation and absorption attenuation, attenuation can not be all finished, there is a surplus of energy to another material a surface, the surface after a new reflection, re-turn back shielding inside the shell, the formation of internal reflection, is called the internal decay, the general use of the A-value is greater than 15db, it is not considered, but if you are using shielding material is thin, the A value is small, it must be considered, general internal reflection decay times, its as follows in addition to the above equation generally low impedance off four electromagnetic shielding of electromagnetic shielding means higher occasions, can be multi-layer shielding structure, according to the needs of the different shielding properties, there are three ways.The management mode of detector in detecting, positioning, shielding of   cell phone jammer   and alarming can be formed. Electrical shielding and magnetic shielding of the combination of multi-layer electrical shielding shielding combination of multi-layer magnetic shield shielded shielding and multi-layer theory, the total shielding effectiveness is the sum of values, but in fact is different, this difference is due Since only in a non-magnetic saturation of the shielding material, the shield in order to obtain the desired shielding effect.