3021301 RF/IF and RFID

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Radio Frequency Interference (RFI) and Electromagnetic Interference (EMI) are two different types of interference that affect electronic equipment. RFI is generated from high-power equipment, including wireless devices, while EMI is generated from power lines and transformers. Both types of interference can wreak havoc on electronic circuits, leading to shorted components, lower signal-to-noise ratio, and degraded signal integrity. To protect electronic circuits from RFI and EMI, contact, fingerstock, and gaskets have been developed.

Contacts

On contacts, the signal path is shielded, isolating the circuit from outside interference. They are particularly effective against RFI and are usually made from brass or nickel plated steel. They come in various shapes and sizes, from modular connectors to board-level connectors and are installed onto the circuit board or onto connecting cables. Contacts are designed to tightly secure the connection and ensure that there is no loss of signal. The contact-to-cable connection also prevents any external interference from entering the circuit.

Fingerstock

Fingerstock, also known as foil shielding, is a thin layer of metal that is placed over the circuits to protect them against EMI. It is usually made from aluminum or copper and is applied over the circuits in the form of a strip or sheet. Fingerstock is designed to provide a Faraday cage effect, diverting and dissipating any disruptive electrical energy away from the internal components of the circuit. It is commonly used in the manufacturing of circuit boards and electronic devices for added protection.

Gaskets

Gaskets are also used to reduce the impact of RFI and EMI. Gaskets are made from a variety of materials such as rubber, foam, and plastic and are placed between the board and the resulting chassis. Gaskets are designed to absorb and deflect any external signals and protect the internal circuitry from potential interference. Gaskets are also used to provide an air-tight seal, helping to prevent dust and moisture from entering the device.

Conclusion

RFI and EMI are two different types of interference that can disrupt the performance of electronic circuits. To protect against these problems, contacts, fingerstock and gaskets are used. Contacts allow for a secure connection between the circuit and its cable, while fingerstock offers protection against EMI. Gaskets also provide added protection, absorbing and deflection any outside signals and providing an air-tight seal to prevent dust and moisture. By implementing these three components, electronic circuits can be protected against RFI and EMI interference, ensuring proper operation.

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