Error Analysis of Electromagnetic Shielding Film Efficiency Measurement

existElectromagnetic shielding filmIn efficiency measurement, errors may come from various factors such as sensor sensitivity, measurement environment, etc. To reduce errors, various methods can be used, such as using multiple sensors for multiple measurements, or testing in different environments to obtain more accurate data. In addition, standard samples can be used for comparison to ensure the accuracy and reliability of the measured data.

The frequency range of 30 MHz to 8 GHz was used to analyze the sources of uncertainty in the measurement of electromagnetic shielding film shielding effectiveness. The focus was on discussing the measurement repeatability, maximum allowable error of measuring instruments, and factors affecting the mismatch error caused by the mismatch between measuring instruments and measuring fixtures. A mathematical model for evaluating the uncertainty of shielding effectiveness measurement was established The results indicate that the extended uncertainty of the electromagnetic shielding film shielding effectiveness measurement is 1.2dB, which meets the requirements of the standard for the device

FPC is mainly used in fields such as consumer electronics and automotive electronics.Electromagnetic shielding filmIt is the core material for FPC to achieve electromagnetic shielding and ensure normal operation. The growth in consumer electronics, automotive electronics and other fields drives the demand for FPC, bringing high prosperity to the electromagnetic shielding film industry.

The smartphone market is still expanding, with new demand replacing the need to support the FPC market. It is expected that 5G mobile phone sales will surpass 4G mobile phone sales by 2024, 5G phones use FPC more than 4G phones; The new demand for replacement of smartphones will continue to support the FPC market, and it is expected that the FPC market size for smartphones will reach $12.7 billion by 2025, with a CAGR of 14% from 2019 to 2025.

The wireless earphone and smartwatch markets have brought new growth points to the electromagnetic shielding film market. In recent years, the market size of smart wearable devices such as wireless earphones and smartwatches has grown rapidly. However, the wiring space of such devices is narrow, and a large number of FPCs are used, which promotes the growth of the electromagnetic shielding film market. The Apple Watch uses 13 FPC chips, while AirPods in China use 6 FPC chips.