With the continuous development of high technology, many high-tech products are constantly emerging. For example, the shielding box has appeared in the development of science and technology, and it has many shielding boxes with different functions. But today, the editor will only carefully explain the function and scope of the signal shielding box for everyone, let’s understand together:
The shielding effect is the signal value obtained for a certain frequency band when the shielding box is opened and closed when the product is tested. The subtraction of the front and back values is the shielding effect. The unit is DB, and the subtraction is a negative value. If the negative value is smaller , Then the better the effect of the shielding box, you have to be prepared before testing the shielding effect. The specific function and application scope of the signal shielding box:
The RF test process is usually the most complicated and influential process in the production line of wireless communication equipment such as mobile phones, and it is usually the bottleneck of the production line. The radio frequency test station is usually composed of several parts such as test instrument, shielding box, test software, etc., and usually can be divided into calibration test, comprehensive test, antenna test and so on.
Due to production capacity requirements, the RF test process is usually run in parallel by multiple identical test stations. The pass rate of one or some test stations is low; lower output will lead to bottlenecks in the production line and a sharp increase in production costs. The reasons can be roughly divided into: product design or material reasons, test problems (errors) Test problems), environmental factors such as radio frequency interference, and uncertain problems in the test.
Electromagnetic interference/EMI is a problem that the entire electronic field must face and overcome at present, generally in wireless communication products such as: mobile phones, wireless network cards, wireless routers, wireless headsets, Bluetooth headsets, wi-fi, wimax, data cards, walkie-talkies, RFID In the process of board testing and final testing of wireless communication equipment and wireless communication modules, the test environment is improved by using the radio frequency test shield box/RF Shield Box.