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The most frequently asked questions from customers about RF Shielding Boxes.
Before purchasing an RF Shielding Box, customers often have questions.
Let’s take a look at the most frequently asked ones.
1. If we add more RF absorbing foam, can we improve the isolation performance of the RF Shielding Boxes?
Yes, but the improvement is very limited, usually only a few dB. The key factor that determines the isolation performance is the structure of the box itself. The main function of the RF absorbing foam is to reduce electromagnetic wave reflections and diffraction inside the RF Shielding Boxes.2. Can I directly route cables into the RF Shielding Boxes?
Yes, but the isolation performance will be significantly reduced. It may cause at least 30 dB of leakage. This is because electromagnetic waves can travel along metal cables and radiate outward. In this situation, the metal cable acts like an antenna. This also applies even if the metal cable is covered with an insulating plastic layer.3. Can the isolation box be integrated with our automated production line?
Yes. As long as we provide the control commands for the isolation box, you can integrate these commands into your automation software.4. Can the RF Shielding Boxes be controlled by a computer?
Yes. You can use a USB connection to send commands to the RF Shielding Boxes for opening and closing operations.5. Will the ventilation mesh on the isolation box cause signal leakage and reduce isolation performance?
No. Although the ventilation mesh contains many openings, these openings are carefully designed and calculated to prevent signal leakage below 8 GHz.6. How often does the RF Shielding Boxes need to be calibrated?
It depends on the usage conditions. Typically, the initial isolation performance of a new RF Shielding Box is around 70–90 dB. Over time, the performance may degrade depending on factors such as usage frequency, environmental humidity, and even how aggressively the operators use the equipment.An RF Shielding Boxes is usually constructed by combining two metal enclosures into a single structure. The electrical continuity between the two metal enclosures is maintained through conductive fabric gaskets. These conductive gaskets are consumable components and will gradually wear out depending on the factors mentioned above. Therefore, it is difficult to predict exactly when replacement will be required.
A proactive approach is to establish a regular calibration and replacement schedule. Based on previous experience:
- Production lines: calibration is typically scheduled every 6 months to 1 year.
- R&D laboratories: calibration is typically scheduled every 1 to 2 years.