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EMI/RFI Filters (LC, RC Networks)

EMI/RFI filters (electromagnetic interference/radio frequency interference filters) are devices that are used to reduce the potentially harmful effects of EMI/RFI from entering a particular area or device to which they are connected, such as an electronic device or component. These filters are available in a variety of forms, including LC (inductor-capacitor) networks, RC (resistor-capacitor) networks, hybrid filters and more.The MEM2012F101R is a surface mount filter designed to protect critical electronics against EMI interference.

Application Field

The MEM2012F101R filter provides effective EMI/RFI filtering for high frequency, low voltage applications and can be used in applications found in computing, telecommunications, industrial, automotive and medical industries. These applications include but are not limited to circuit boards, peripheral devices, vending machines, RF transmission systems, printers, instrumentation and consumer electronics.

Working Principle

The MEM2012F101R filter functions by absorbing and reflecting EMI/RFI energy across the frequency range of 0.2 – 35 GHz. It works by blocking the RF interference generated by external sources and by suppressing the RF noise emitted from the device itself. The filter utilizes a combination of inductors, capacitors, resistors and magnets to achieve superior EMI/RFI filtering.

The inductors are responsible for absorbing RF energy in the form of inductive impedance. The capacitors serve to dissipate the current across the entire frequency range and are used in combination with resistors for impedance matching and amplitude control. Lastly, the magnets create a resistive barrier of energy which serves to further reduce the amount of RF energy allowed through the filter.

The MEM2012F101R is designed to provide exceptional RF absorption performance with minimal insertion loss in the desired frequency range and without introducing any major distortion. Furthermore, it does not sacrifice the signal integrity of the target device and allows for maximum data throughput.

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