RFI and EMI: Frequent Questions

RFI and EMI are two types of inference that negatively affect electronics. Below are some frequently asked questions on RFI and EMI.

What is EMI?

EMI stands for electromagnetic interference and is defined as any electromagnetic emission that causes a disturbance to electronic equipment. EMI can be either natural or man-made.

What is RFI?

RFI stands for radio frequency interference and is considered any electrical energy that is within the frequency range dedicated to radio frequency transmission. Conducted RFI is mostly found in the frequency range of several KHZ to a maximum of 30 MHZ

What are some common sources of conducted interference?

Conducted interference can come from AC motors, power supplies, switches, and almost every electronic device that can generate both conducted and radiated interference.

What is an Electromagnetic interference filter?

An EMI filter is a passive electronic device that is used to stop conducted interference

How do you shield RFI or EMI?

You can shield electromagnetic interference and radio frequency interference with EMI and RFI shielding gaskets. It is important to use RFI shielding and EMI shielding in order to prevent electronics from malfunctioning. Without RFI shielding and EMI shielding, electronics would be vulnerable to the negative effects conducted interface.

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