cell phone jammer could be widely used in military | cellphone ...

Posted on January 4, 2012 by admin

If necessary hole or seam structure should be sought to the corner in a circular form. * When the shielded cylindrical object, the size of each layer of the overlap of not less than 3 / 4 〃, and the first layer of the interface at 180 ° position, the next layer of the interface at 90 ° position, then the next layer is located in the 180 ° position, and so on. * In order to improve the shielding effect, between every two layers of shielding to retain 3-4 times the sheet thickness of the space. * Because the sheet material has high permeability, so should avoid the use of a continuous spiral winding it, otherwise it will be possible to generate the equivalent of the magnetic shield structure. When installing      cell phone jammer places of components. When drilling in thin materials, ensure correct processing in the sheet metal under the conditions, rather than in the ordinary conditions of operation of the metal processing, because the normal mode of operation will have a thin screwdriver to bend effect could lead to , which is the shield of metal between the two regions of space isolation to control the electric and magnetic fields and electromagnetic waves from one area to another area of the induction and radiation.The standard installation distance between components of   cell phone jammer     should be proper.  Specifically, the shield is to use component parts, circuits, assemblies, cable or the entire system, surrounded by sources of interference, to prevent interference with electromagnetic field spreads out; will receive circuit with shield, surrounded by equipment or systems, to prevent them from outside electromagnetic fields. Because the shield from the wire, cable, component parts, circuits or systems, electromagnetic interference from external and internal electromagnetic energy absorption are playing (eddy current loss), the reflected energy (electromagnetic waves in the interface reflection on the shield) and offset energy ( electromagnetic shielding layer in a reverse electromagnetic field, electromagnetic interference can offset some of) the role, so the shield with a reduced interference function. (1) If power supply adapter cannot horizontally travel more than 20cm due to the limited field installation environment when installing   cell phone jammer    , the compromised method is placing power supply adapter under main machinery of   cell phone jammer    .When a high frequency electromagnetic interference, the use of low resistivity metal eddy current generated in the formation of external electromagnetic waves offset to achieve the shielding effect. (2) When the frequency of electromagnetic interference is low, to high permeability of the material, so that the magnetic field lines within the limited shield to prevent the spread to shield the space to go. (3) In some cases, if the requirements of high frequency and low frequency electromagnetic fields have a good shielding effect, often composed of different layers of the metal shield. Many people do not understand the principle of electromagnetic shielding, do that as long as a metal box, and then ground the box, you can play the role of electromagnetic shielding. Under the guidance of this concept results in a failure. Because, electromagnetic shielding and shield grounding or not does not matter. The real impact of the shielding effectiveness of the shield only two factors: one is the entire surface of the shield conductivity must be continuous, one can not directly penetrate the shield conductor. The heavy current circuit also includes 220V power supply wire supplying power to     cell phone blocker itself.There are many conductive shield discontinuity points, the most important one is the combination of different parts of the shield formed at the non-conducting gap. These non-conductive gap gave rise to the electromagnetic leakage from the container as fluid will leak on the cracks on the same. One way to solve this leakage is to fill the gap at the conductive elastic material, to eliminate non-conductive points.

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