Trendy appearance ofcell phone jammer

 Shield leakage coupling structure with the required suppression of the electromagnetic frequency is closely related to three types of shielding frequency range involved and control elements as shown in Table 5: Table 5 leak coupling structure and control elements of the type of magnetic shielding electricity shield shielded shielding frequency range of 10kHz ~ 500kHz 1MHz ~ 500MHz 500MHz ~ 40GHz shielding shell leakage coupling structure and the ground shield shell apertures and ground elements of a reasonable choice of shell material control selection shell material well-grounded and reasonable apertures suppress the actual leak grounded shield at the same time there are multiple leaks coupled structure (n a), based chassis seams, vents, siding and other shield leakage coupled structure separate shielding effectiveness (eg, consider only the seams) to SEi (i = 1,2, ..., n), then the shield shielding effectiveness of the total can be seen from the above equation, the shielding effectiveness of the shield is coupled by the structure of the various leakage greatest leakage coupling structure of the decision, that is shielded by the weakest link of the decision of. Therefore, we can guarantee the effect of MDPB-02 cell phone jammer.Therefore, shielding design, clear structure of the different bands of leakage coupling, coupling elements to determine the maximum leakage is the primary design principles. In the three types of shielding, magnetic shielding and electromagnetic shielding more difficult. In particular, electromagnetic shielding design the most critical hole seam leakage suppression, shielding design should focus on a primary factor to consider. Figure 4 Schematic diagram of a typical cabinet under the hole coupling theory, the decision apertures leakage has two main factors: hole seam line area and the maximum degree of size apertures. The blocking range of cell phone jammer is better a bit larger than the area of the field.Both Jietai, the most serious leaks; area of small and large size of the largest degree-line electromagnetic leakage is still large. Figure 4 shows a schematic of a typical rack, above the apertures can be divided into four categories: chassis (cabinet) type of sewing seams Although small in size, but the degree of its maximum line size is very large fracture length, due to maintenance, open constraints, resulting in electronic equipment such as sewing the largest category of difficult mask apertures, conductive pads, and other special shielding material can effectively suppress electromagnetic leakage.