1. In the wireless production test, why use a shielded box?
To this question, we must first understand that there are two purposes of shielding:
One is to prevent external radiated electromagnetic energy from entering a certain area.
The second is to limit the radiated electromagnetic energy inside the device from going out of a certain area;
2. What is the shielding coefficient of the shielding box?
Shielding effectiveness of shielding box:
Refers to when the simulated interference source is placed outside the shielding box, the ratio of the electric field strength, magnetic field strength or power at a certain point in the space before and after the shielding box is placed and then the logarithm (lgp1/p2) is expressed in dB.
3. What are the test equipment in the production and test link of the shielding box manufacturer?
The shielding box test equipment includes:
Dipole antenna, horn antenna, shielding box, network analyzer (signal generator + spectrum analyzer), etc.
4. What is the specific role and application scope of the shielding box?
For manufacturers of wireless communication products, the failure of the products to come to market in time or the rapid increase in volume will result in the loss of a large amount of output value and profits. Directly affect the follow-up business and market share expansion.
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 (mistest problems), environmental factors such as radio frequency interference, and test uncertainties.
Electromagnetic interference/EMI is a problem that must be faced and overcome in the entire electronic field. 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/RFShield Box.