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Classification and application scope of shielding box

Author:admin   AddTime:2021-03-12

The shielding box is a shielding body of various shapes made of conductive or magnetic materials, which limits the electromagnetic ability within a certain space, and is used to suppress the metal body of radiation interference; and deal with the conduction and radiation to achieve the It is a device that provides a non-interference test environment for testing wireless communication equipment.

According to different test requirements, it is manufactured into different working modes such as manual, pneumatic, and fully automatic. The shielding boxes are divided into the following three categories. Pneumatic shielding boxes are generally large in size, in order to improve the test efficiency and reduce the fatigue of the operator in the production test. The fully automatic shielding box completes the entire test process by controlling the test shielding box through the international standard RS232 interface according to communication instructions. Generally, small radio frequency modules are used in large-scale production line production to improve production efficiency. The manual shielding box is generally small in size and convenient to operate. It is currently the most commonly used one on the production line of small communication equipment such as mobile phones. In addition, some parts are too large and inconvenient to use pneumatic operation, but also use manual gatekeeping.



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 radio frequency test process is the most complicated and influential process in the production line of wireless communication equipment such as mobile phones, and it is also 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 capacity requirements, the RF test process will be run in parallel by multiple identical test stations. If the pass rate of one or some test stations is low and the output is reduced, it will easily 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, environmental factors such as radio frequency interference, and test uncertain problems.

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