In mobile phone shielding projects, the reasons for different signals caused by external and environmental factors are:
1. Due to the different power and number of channels of base stations such as China Mobile, China Unicom, and China Netcom, the distance between the base station and the prison, and the different sizes of other nearby buildings, topography, and landforms, the signals in the prison area are also different. signal jammer
2. Due to the different characteristics of the actual use environment, the direction, power, distance and distance of each base station, there may be dozens of channels for the user’s mobile phone to automatically select in the same environment. At the same time, there are spatial field strength differences indoors and outdoors. Ground and metal Objects cause very complex adverse effects on signals blocked by mobile phones. So we all have this experience, for example: (a) In different areas, some mobile signals are strong, and some China Unicom signals are strong: (b) Even in the same place, the signals are also different, some are strong and some are weak, so mobile phones The signal shielding system is a highly professional system project.
Measures taken for the above reasons:
1. Conduct a detailed on-site survey of the prison environment, topography, landforms, etc., very carefully. The survey needs to shield the regional environment, understand the actual requirements of the customer, and design personalized solutions. Therefore, special project investigation and solution must be carried out to comprehensively solve problems for customers in a scientific and systematic manner.
2. Thoroughly analyze the local signal distribution and building structure. It is positioned using non-general equipment and measured by a series of instruments. Choose different composite antennas based on the organic combination of antenna application principles in different frequency bands.
