PEMI2STD/WG,115

The PEMI2STD/WG,115 application field refers to Electromagnetic Interference (EMI) or Radio Frequency Interference (RFI) filters based on inductor-capacitor (LC) and resistor-capacitor (RC) networks. Although both RC and LC networks are used to filter out interfering frequencies, each type of filter has its own strengths and weaknesses and thus different are used for different types of applications.

The basic working principle of these filters is that as a signal passes through the filter a portion of the signal is either blocked or passed through while the rest is reflected back. In the case of an LC filter, the inductors act as obstacles for the signal and prevent it from passing through, while capacitors act as passageways and allow the signal to move forward. The greater the inductance of the inductors, the more difficult it is for signals to pass through, thus forming a frequency dependent response. In an RC filter, resistors act as obstacles and capacitors act as passageways, with the difference being that the amount of signal that is blocked is a function of the resistance of the resistors.

In order to use these filters effectively, it is important to understand the relationship between the different elements in the filter. The LC filter has two components – an inductor and a capacitor – while the RC filter has three: a resistor, a capacitor and a transmission line. The design of the filter depends on the parameters of each component and the relationships between them. For example, if the inductance of the inductor and the capacitance of the capacitor are large, the filter will be a low pass filter, however if the capacitance is low and the inductance is high, it will be a high pass filter.

The LC filter tends to have better performance in terms of insertion loss, while the RC filter tends to be cheaper and easier to manufacture. They both have advantages and disadvantages, but the selection of the filter type will depend on the specific application. Each filter also has a frequency response that can be determined by its design parameters, and the parameters of the components can be adjusted to achieve the desired response. The goal is usually to design the filter so that the signal is passed but the noise is blocked, however this can be further adjusted depending on the specific application.

In general, the PEMI2STD/WG,115 application field is a very complex and specialized area of electronic design. It is important to understand the various concepts and their interactions in order to design filters that are best suited to the application. By understanding the design parameters and the relationships between them, one can design a filter that is tailored to the specific application and ensure that it meets the desired performance requirements.