RF shielded Box / Cabinet

Applications of RF Shielded Cabinet

• Application wireless communication test

• EMI test

• Coupling test

• RF function test

• Receiver sensitivity test

• Transmitter radiated power test

• Bluetooth, DAB/DMB

• EMI and EMS test of small UHF equipment

• Mobile phone, Bluetooth, wireless router and other equipment, complete machine or chip test

How to Choose RF Shielded Boxes?

1. Look at the operation mode of the RF chamber box

When we use the RF shielded cabinet, we must first clearly know what is the operation mode of the RF shielded cabinet we need? Generally, the RF shielded cabinet is divided into a manual shielded cabinet, a pneumatic shielded cabinet and a semi-automatic shielded cabinet. The pneumatic shielded cabinet is generally divided into electric switch button control, RS232 serial port control, and a fully automatic programmable shielded cabinet. Only when we know what kind of operation is needed, we can make further judgements.

2. Look at the frequency of the RF chamber box

After confirming the operation mode of the shielded cabinet, we also need to know the frequency of the product we are testing, and what frequency band signals need to be isolated. Only in this way can we know how to choose the absorbing material inside our RF chamber box, and which frequency band is the focus of the filter processing method of the interface. Only in this way can we obtain the most suitable high RF isolation box for us.

3. Look at the size of the RF isolation box

Generally speaking, the choice of size is based on the size of the box, because our test products are placed inside the RF shielded box. For the internal size here, we not only consider the size of our products, but we also need to consider the size of the space we need for testing. Including if there is the size of fixtures, will we increase our size requirements after our subsequent product upgrades? Only in this way can we avoid the shelving of the RF chamber box caused by the upgrade of the subsequent company's products. Generally, we also need to consider the external dimensions, because our RF shielded cabinet needs to be placed in the actual test environment. In the actual application process, the placement of other instruments and the operating position of the personnel need to be taken into consideration.

4. Look at the interface of the RF enclosure box

We need to consider the data interface configuration of our RF test enclosure. Now in the testing process, many customers who need shielded test enclosures need a data connection. Generally, the data interface of the rf shielded cabinet is DB9/DB25/RJ45/AC/DC/USB, etc. These are an indispensable part of our testing process, what types are needed, and how much each type needs. We have to be aware of this, and avoid waiting for the RF chamber box manufacturer to process it before we discover that we can’t use it at all.

RF Shielded Enclosure Design

When designing an RF-shielded enclosure, there are a few important factors to consider:

1. Frequency range: You'll need to determine the frequency range you need to shield against. This will depend on the specific application of the enclosure.

2. Shielding material: The enclosure needs to be made of a material that is capable of blocking the frequencies you're trying to shield against. Typically, this will involve using a conductive material such as copper or aluminium.

3. Shielding effectiveness: The effectiveness of the shielding will depend on a variety of factors, including the material used, the thickness of the material, and the design of the enclosure. You'll need to ensure that the shielding is effective enough to meet your requirements.

4. Sealing: The enclosure needs to be properly sealed to prevent any RF leakage. This may involve using conductive gaskets or other types of shielding materials to ensure a tight seal.

5. Connectors: The connectors used to connect cables or devices to the enclosure need to be properly shielded as well. This may involve using shielded connectors or adding additional shielding around the connectors.

6. Ventilation: If the enclosure needs to be ventilated, this will need to be done in a way that doesn't compromise the shielding effectiveness.

Overall, designing an RF-shielded enclosure can be a complex process that requires careful attention to detail. It's often best to work with a qualified engineer who has experience in designing RF-shielded enclosures to ensure that the enclosure meets your specific requirements.