Cell phone jammer has little impact on the area beyond the examinationroom

cell phone jammeris manufactured applying the advanced foreign technology
6.2 The shielding effectiveness of shielded cable
6.2.1 shielding parameters on the performance of the cable shield
Shielded cable transfer impedance and shielding effectiveness of shielding by the type of termination methods, material properties, and many other factors, the following will be used Xidian University compiled simulation software to analyze these factors.cell phone jammer has little impact on the area beyond the examination room.
6.2.1.1 Single shielded cable
Braided shielded cable is divided into single, inclusive of two forms, affect the performance of braided cable shielding density parameters are woven, knit and woven wire horn wire diameter, material, etc., affect the performance of the cable shield inclusive parameters shield thickness, material, etc. .
6.2.2.1.1 braid shielded cable
mobile phone jammer applies the special advanced technology according to requirements of the market. Figure 6.6 shows the same density woven, braided angle of three different cable screen effectiveness comparison can be seen from the figure, when low-frequency electric
Cable screen larger effect, with increased frequency, approximately the same value, which was mainly due to low screen shielding effect depends on the DC resistance. The gap at high frequencies because the increasing influence of leakage, resulting in screen efficiency dramatically. It also can be seen, the greater the braided angle (see Figure 6.6), the higher the screen effect. Depending on the hole coupling theory, the hole leakage rate depends on the polarization of the hole, (6.1) gives the hole polarizability expression:
Figure 6.7 shows the braided angle weave density of the same four different cable screen effectiveness comparison can be seen from the figure, weaving density can improve the screen efficiency, but the density is too high will cause the cable is very hard to change their mechanical properties poorly, so the density must be controlled within a certain range. People can enjoy fastness and convenience brought by high technology equipments includingcell phone jammer. As mentioned above, the hole leakage from the hole density of the polarization factor and decided, in the braided angle the same situation, different power densities
The polarization factor of the same cable, thus the leakage depends only on the size of the hole. 40%, 68%, 83% of three densities, for example, (93% density is too high,
Flexibility is poor, should not be used) s3 / 2 were 39 × 10-9,1.9 × 10-9,3.1 × 10-10, the first two times the difference of 21.41, the latter two the difference is only 6.12 times. The maintenance can prolong the useful time of cell phone jammer.Obviously, as opposed to 40% density, 68% of the density can be greatly improved screen efficiency, and high densities, increase the role of screen effect is not obvious.
6.2.2.1.2 inclusive type of shielded cable
Figure 6.8 shows the silver, nickel, the thickness of the cable screen effectiveness of four different compared with the braided cable Instead, inclusive cable from the