The antenna direction influences blocking range of cell phone jammer

Quality Assurance Department plans to hold a meeting to discuss the quality feedback of 3g cell phone jammer from the customer. Conductive rubber: usually used in situations with environmental sealing requirements from the structure on the points, plates and strips are two types of hollow and solid material is divided into two plates have different thickness materials: silicone rubber mixed with copper powder, aluminum powder, silver powder, silver powder, silver-plated aluminum, silver-plated glass powder, etc. The shielding performance are: low-frequency shielding effectiveness is low, higher high-frequency shielding effectiveness when
Main advantages / disadvantages: while providing sealing and environmental sealing electromagnetic hard, high prices, because the surface is relatively soft, and sometimes can not pierce the surface of the metal oxide layer, resulting in very low shielding effectiveness.Chief Engineer hosted the meeting during which some technical details of cell phone jammer had been determined.

Finger guard: usually used in the sliding contact surface where contact with many traits, the material is beryllium copper, but do different surface coating for the high-frequency shielding performance, low-frequency shielding effectiveness is higher when
Main advantages / disadvantages: large deformation, high shielding effectiveness, allowing sliding contact (which facilitates removal) / high price
The nameplate content of the 3g cell phone jammer adapter should be accurate. But for electromagnetic shielding of the conductor increases the electrostatic coupling, so even if only for electromagnetic shielding, but also or the ground as well, so the electromagnetic shielding also play the role of electrostatic shielding. In summary, electrostatic shielding, static magnetic shielding, electromagnetic shielding of the physical content, physical condition, the shielding effect is different, the materials used and also from specific conditions but they are shielded electromagnetic fields, is essentially linked.
Analysis of the prison cell phone screen cell phone with the improvement of prisons and improving prison shielding Analysis Overview of a cell phone screen.
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