By Robert Meilleur, Corry Micronics, Inc.
When electronic devices have internal operating processes that rely on signals in a specific frequency spectrum, unintended results may occur if RF or microwave electro-magnetic radiation interacts with the device. This occurrence is called Electro-Magnetic Interference (EMI). EMI is a serious concern for devices that are externally powered or require signal wires that need to extend outside the device. The wires that connect to power sources, or I/O points, can act as antennas that will allow EMI to be received and enter the device and cause the device to perform improperly. The most common way to prevent EMI from interfering with these devices is by installing feedthrough filters on their signal and power lines. Download the full paper to learn more about the use of ceramic feedthrough filters to fight against EMI.