Conducted EMI and Radiated EMI are two distinct types of electromagnetic interference that can affect electronic devices and systems. They refer to how unwanted electromagnetic energy is propagated and cause disruptions.
Conducted EMI
Conducted EMI refers to electromagnetic interference that is conducted along physical conductors such as power lines, signal cables, and PCB traces. This type of EMI is typically caused by electrical noise generated by components or circuits within the electronic device itself or external sources. Conducted EMI can propagate through conductive paths and enter or exit electronic devices through their power and signal connections.
Radiated EMI
Radiated EMI, on the other hand, refers to electromagnetic interference that is emitted into the air as electromagnetic waves. This type of EMI is typically caused by electronic devices or circuits that act as unintentional antennas, converting the conducted EMI into radiated energy. External sources, such as radio transmitters, cell phones, and other wireless devices, can also produce radiated EMI.
Conducted EMI is interference that travels through physical conductors like cables and wires, while Radiated EMI is interference that spreads as electromagnetic waves in the air. Both types can disrupt electronic devices, and designers use techniques like filtering, shielding, and grounding to minimize their effects.
EMI shielding gaskets help by creating a barrier that blocks unwanted electromagnetic signals. They prevent interference between components, contain emissions, reduce crosstalk, and ensure devices comply with regulations. They are customizable and crucial for improving the performance and reliability of electronic devices in noisy environments.