Rubber cable shield conductor to semi-conductive rubber material processing. Conductor shielding layer around the packet mode and squeeze packet mode of production, the production of extruded way around the bag than the shield produced a more smooth without protrusions, easy to increase the effect of uniform electric field. The selection of conductor shield thickness from two aspects: one is to ensure that the extruded conductor shield after the smooth surface, due to rubber-sheathed cables for mining thin copper wire commonly used way of mining cables, so do not may be compacted, the surface of the wire strands of wire there is a certain degree of veins, these rugged performance for low-voltage electrical cables do not have much impact, but just for the high-voltage cable caused a non-uniform electric field strength to rely on Extruded or wrapped conductor shield to eliminate its effects, but too thin conductive shield layer thickness in the process is difficult to achieve;cell phone jammer can have three or four antennae and so on according to model of cell phone jammer. In addition, from an economic point of view, although the conductor shield is relatively thick in the process easy to implement, but the cable insulation thickness for each additional 1mm would make the cable into the cable outer diameter increased 4.3mm, followed inevitably bring about dramatic increase in use of the sheath material, it brought a substantial increase in the cost of cable manufacturing . In the GB12972-91 and MT818-1999 standard are proposed “semi-conductive layer thickness control in 0.7mm or so calculate the actual thickness assessment.” Taking these two factors, the use of both standard and consistent conductor shield thickness is appropriate. Antenna of cell phone jammer have the omnidirectional antenna and direction antenna. Reference to this requirement, the 6/10kV rubber-sheathed cables for mining also made calculations conductor shield thickness control in 0.7mm, 0.7mm actual production is controlled by the thickness, but not as a rigid control of quality indicators of the technical requirements . Wire and cable industry is second only to China’s second largest industry, automotive industry, product variety to meet the rate and the domestic market share of more than 90%. In the world, China wire and cable output value has exceeded the U.S. as the world’s largest wire and cable producer. With the rapid development of China’s wire and cable industry, the growing number of new enterprises, the industry has been a substantial increase in the overall level of technology. China’s sustained rapid growth for cable products provide a huge market space, China market, a strong temptation to make the world all eyes are focused on the Chinese market, in just a few decades of reform and opening up, China’s cable industry The formation of a large production capacity of the world with admiration. The antenna of 3g cell phone jammer can be the omnidirectional whip one. As China’s power industry, data communications, urban rail transit industry, automotive industry and shipbuilding industry continues to expand, the demand for wire and cable to grow rapidly, the future of wire and cable industry, there is great potential for development. In November 2008, China’s response to the global financial crisis, the government decided to invest 4 trillion yuan to stimulate domestic demand, which has about 40% for urban and rural power grid construction and transformation. National wire and cable industry, there has been a good market opportunities, local cable companies to seize opportunities and meet the new round of urban and rural power grid construction and transformation. cell phone jammer contains some other parts. As the easy exploitation of the world’s energy is being depleted, mining development work has now been moved to a more harsh environment.