The blocking range of cell phone jammer relates to the antenna direction

Filter Ground: filter generally contains the signal line or power line bypass capacitor to ground, when the filter is not grounded, the capacitor is in a suspended state, would not achieve the bypass effect. * Noise and interference suppression: the internal noise and external interference control equipment or systems need many points to ground, so as to interfere with the signal to provide “minimum resistance” channel. * Circuit Reference: circuit between the signal to be transmitted correctly, there must be a common potential reference point, the common potential reference point is ground. The blocking range of    china cell phone jammer relates to the surrounding buildings.Therefore, all interconnected circuits must be grounded. All of the above reasons for the formation of the complex requirements of the grounding. However, only the general requirements in the design of specific safety and lightning protection grounding requirements are implicit in the other users of the system or equipment, electromagnetic compatibility requirements. Back to Contents 3 grounding technology is currently applied grounding techniques and methods can be said to sum up the experience of the past to solve the problem.
In considering the grounding problem, we should consider two aspects, one is the system of self-compatibility issues, the other is external interference coupled into the ground loop, resulting in system malfunction. Due to external interference is often random, so it is often more difficult to solve. Grounding requirements should be grounded for many reasons, few are listed below: 1) safety ground: AC equipment must be grounded through the yellow-green safety ground, or when the device is within the power supply and case insulation resistance between the variable hours, will cause electric shock. 2) ground lightning: the lightning protection system facilities is an independent system, the lightning rod, under the conductor and the grounding system is connected to the connector with the composition. The grounding system is usually used as reference to the power and ground yellow-green safety ground wire is shared.
The blocking range of    cell phone jammer relates to the distance between it and the base station.Ground lightning discharge only in terms of facilities and equipment do not have this requirement. 3) Electromagnetic Compatibility ground: design for electromagnetic compatibility requirements of the ground, including: * Earth Shield: In order to prevent the parasitic capacitance between circuits because there is mutual interference, the circuit of the external electric field or electric field of radiation-sensitive, must make the necessary isolation and shielding, the isolation and shielding of the metal must be grounded.