PEMI2QFN/CR,115 Filters

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EMI/RFI Filters (LC, RC Networks) are an essential part of any circuits. Specifically, the PEMI2QFN/CR,115 filter is a high isolation filter designed to protect electromagnetic sensitive circuits from high frequency, high-frequency interference and reduce electromagnetic emissions.

The application field of PEMI2QFN/CR,115 predominantly covers high frequency applications such as radio transceiver circuits, short-wave antenna circuits, microwave modules, wireless communication systems, LoRa and smart home controls. Additionally, the filter can be used to reduce electromagnetic emissions drastically in any low-noise system environment.

The actual components in this filter are comprised of a piezoelectric capacitor, a resistor, and an inductor. The filter is constructed through the combination of these elements.

The piezoelectric capacitor can store electric charges under specific conditions, and the stored electric charges form an electric field between the capacitor plates which will react to an externally applied voltage. By connecting the capacitor in series with the circuit, the capacitor will absorb electromagnetic radiations generated by the circuit. This is the basis of PEMI2QFN/CR\'sshielding ability.

The resistor is used to reduce the electrical charge that is generated in the capacitors and eliminate high frequency noise while allowing only the desired frequency signal to pass through.

The inductor is used to reduce the high frequency noise generated by the circuit and reduce the current passing through the circuit, so that the filter will not be easily over-loaded by high current.

The working principle of PEMI2QFN/CR,115 is based on the shielding effect of the piezoelectric capacitor, the attenuation effect of the resistance and the inductance. As the input signal passes through the filter, the piezoelectric capacitor provides shielding which reduces the noise level. The resistor and inductor reduce the high frequency components of the signal, so that only the signals within a certain frequency range will be passed through.

In conclusion, PEMI2QFN/CR,115 is an ideal EMI/RFI filter for high frequency applications. It is designed to protect sensitive circuits from high frequency interference and reduce electromagnetic emissions. The filter combines the shielding effect of the piezoelectric capacitor, the attenuation effect of the resistor and inductor, to filter the signals and reduce the noise level.

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