The total power of bands of mobile phone jammer is 40 wattCan beabsorbed by the material loss nomogram derived

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 transmitter output of cell phone jammer is adjustable. 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. It's like in the fluid container, fill the gap at the rubber for the same reason. This flexible conductive filler material is magnetic gasket.

In many documents will be sealed electromagnetic shield metaphor of the liquid container, it seems that only when a conductive elastic material to leak to the extent of the gap was sealed to prevent leakage of electromagnetic waves. cell phone jammer can nonstop work without any break. In fact, this is incorrect. Because of gaps or holes will leak electromagnetic waves, depending on gaps or holes relative to the size of the wavelength of electromagnetic waves.

An electric field shielding
Shielding mechanism: the electric field sensor as a distributed capacitance between the coupling.
[Design elements]:
a, shield plate to close the protected material as well, and the shield of the ground must be good. . .
b, shield shape of the shielding effectiveness of the level of significant impact. Closed metal box is best, but works hard to do.
c, shield material to a good conductor as well, but the thickness is not required, as long as there is sufficient strength can be a
In short, the electromagnetic shield the electromagnetic wave attenuation is mainly based on the reflection and absorption of electromagnetic waves.

[Loss] absorption of different materials, different material thickness for the absorption of electromagnetic waves is not the same. The total power of bands of mobile phone jammer is 40 wattCan be absorbed by the material loss nomogram derived.
[Return Loss] is divided into three categories: low-impedance magnetic field, high-impedance electric field, plane wave field.
The low impedance and high impedance electric field reflection loss calculated in the same column chart, and metal materials, frequency and distance from the radiation source to the shield.
For a plane wave, wave impedance is a constant, with the distance from the radiation source to the shield has nothing to do, only in the column chart to connect metallic materials and in the frequency of interest can be obtained at this time of the return loss values.The vehicular GPScell phone jammeris with the car adapter.