1. Due to the difference in the power and number of channels of the signal towers such as China Mobile, China Unicom, and China Netcom, the distance between the signal tower and the prison, and the size of other nearby buildings, terrain, and landforms, the signals in the prison area are also different.

2. Because the scale, building structure, local cell phone signal tower direction, power, terrain and other factors of each prison are different, the cell phone signal strength, number of channels and frequency bands in each area of ​​the prison are different. In addition, radio waves are invisible and intangible, and are affected by various factors during their transmission.

3. Due to the different characteristics of the direction, power, distance of each signal tower in the actual use environment, there may be dozens of channels for the user's mobile phone to automatically select in the same environment, and there are differences in the field strength of indoor and outdoor spaces, ground And metal objects cause very complex adverse effects on the signal of the cell phone jammer. So we all have experiences like:

(a) In different regions, some mobile signals are strong, and some Unicom signals are strong;
(b), even in the same place, the signal is also different, there are strong and weak points, so the mobile phone signal shielding system is a highly professional system project.

Approach to the above reasons:
1. Carry out a detailed on-the-spot investigation of the prison environment, topography, landforms, etc., very carefully. The investigation needs to shield the regional environment, understand the actual requirements of customers, and design personalized solutions. Therefore, it is necessary to carry out project investigation, project solution, and comprehensively solve problems for customers in a scientific and systematic manner.
2. Thorough analysis, thorough analysis of local signal distribution and building structure. Using non-general general equipment positioning, measured by a series of instruments. Choose different composite antennas, and organically combine the application principles of antennas in different frequency bands.
3. After on-site inspection of the building structure, terrain and local signal tower direction, power, channel, etc.; and have a large number of communication microwave technology, professional, high quality, strong sense of responsibility, very serious requirements for details, construction experience The rich staff can meet the construction needs of the large-scale mobile phone signal shielding system engineering site, and solve and deal with various difficult problems on site in time. Complete and rich professional technical data and professional testing and analysis instruments can solve practical problems for clients of the prison and provide them with the best solutions.