The filter inductor is mainly used to combine with capacitor and resistance to form a filter. Generally, ferrite material is used, and winding inductor is used in some high performance filters. A filter composed of inductance, capacitance and resistance can effectively filter the frequency point of a specific frequency in the power line or the frequency other than that point to get a power signal of a specific frequency or eliminate the power signal of a specific frequency.

The main characteristics of inductance filter are DC resistance, AC resistance and high frequency resistance. According to the frequency band passing through the signal, it can also be called low-pass filter or band-stop filter.

According to the data collection and market analysis of many organizations, the RF front-end market where the filter is located has considerable prospects, accounting for nearly half of the revenue, and the market share of filter inductor as one of the filters is not low, which fully shows that the prospects of the passive components industry are still optimistic, the key lies in the ability to Whether to seize the opportunity.