This cell phone jammer company has taken the lead to introduceintelligent power-down concept

This cell phone jammer company has taken the lead to introduce intelligent power-down concept
Therefore, to prevent low frequency (50Hz) AC electric field can also be attributed to electrostatic shielding category. Electrostatic shield is the inevitable result of electrostatic equilibrium. Conductor of the static equilibrium condition is the internal field is zero everywhere. Essence, the additional electric field inside the conductor E 'in the opposite direction of the applied electric field E0. cell phone jammeruses the stream line mass production. When the conductor at both ends of the positive and negative charge accumulation to a certain extent, the intensity will be large enough to fully offset the E0. E 'then the total field inside the conductor E = E0 + E', the result is zero everywhere, free charge is no longer moving. In static equilibrium, a conductor cavity and other live conductor shell and solid conductors, as no internal electric field. If it reaches a static equilibrium state, whether live or in the conductor itself outside the cavity electric field, the conclusion is always valid. Shielding effectiveness of shielding materials shielding principle :1007 -3973 (2011) 001-092-02. This conductor cavity objects (field strength) are not subject to the charge and electric field outside the cavity effect, closed conductor shell of this " shield "the role of external electric field is electrostatic shielding. cell phone jammer applies efficient and strict management. The shield conductor of the shielded shell thickness and conductivity of no special requirements, but the low frequency AC electric field shielding also included, the shielding shell of conductivity or higher as well. Electrostatic shielding is widely used, some transistors using metal instead of glass shell shell; some of the sophisticated electronic equipment is often placed in metal boxes; send weak signals, use shielded cable, are examples of the use of electrostatic shielding, but not when the conductor shell ground, this shielding effect is unilateral and incomplete.Product’s high quality, stable performance and long endurance of cell phone jammer can be guaranteed.  If the conductor is charged with the body shell exists, then the inner surface of the shell at this time due to conductor sensor and negatively charged outer surface is positively charged, if the shell is negative charged body, the inner surface of the induced charge is positive, outer surface of the negative induced charge, electric field distribution is still to go outside, can not act as a "cut off the electric field source" role at this time allows the grounding conductor shell, the outer surface of the ground and disappear as the charge, the electric field confined to the conductor inside the shell, even if electric field change does not interfere with the outside world. generally are used in the actual use of grounded shielding. For example, installation of high voltage electrical equipment grounded metal mesh, electronic equipment and certain parts of the overall use of grounded metal shell. 2.2 Static magnetic shielding static magnetic shield outside the purpose of shielding static magnetic field and low-frequency current magnetic field, then must use magnetic media for housing.According to the long-time testing and inspecting and the feedback information of customers at site, mobile phone jammer has formed its own special feature. Casing is magnetic field induction, the occurrence of magnetization, the magnetic field can be synthesized in the ferromagnetic medium significantly strengthened, and significantly reduced in its surrounding. A steel on the outside of a magnetic field B, the steel in parallel with the cavity can be seen as reluctance because of the air permeability close to 1, while the steel permeability at least several thousand.