LFD212G45DP4A189

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

RF filters are components used to selectively inhibit or pass certain signal frequencies and are typically required for signal isolation in radio frequency applications. One of the most frequently used RF filters is the LFD212G45DP4A189 model. There are a variety of applications for this type of filter, and this article will discuss the various uses and the internal working principle of this filter.

Application Field of LFD212G45DP4A189

The LFD212G45DP4A189 is primarily installed in wireless base station applications, low noise amplifiers (LNAs) and other RF front-end devices. It is also commonly used in mobile devices for 3G/4G communication, such as in handsets and other wireless gadgets. It is designed for base stations operating in the 2.1GHz to 2.45GHz frequency range.

The filter provides high selectivity and low insertion loss throughout its upper and lower passbands. In addition, its pass-band shape is excellent, with an excellent frequency slope and almost no overshoot. This filter is also well-suited to electronic communications such as WiFi and WiMAX. It provides an excellent signal-to-noise ratio, and its S-parameter response is optimized for linear systems.

Working Principle

The LFD212G45DP4A189 is a four-pole type of filter, meaning it utilizes four individual tunable inductors and associated capacitors to create an overall pass-band. This type of structure is known as a Butterworth filter, and is designed to provide a very flat frequency response over the entire pass-band. The four tunable inductors are connected in series, and form the low-pass filter portion of the design. The capacitors are interconnected between each inductor to form the high-pass filter section.

At the center of the filter is a resonator, which is used to further shape the pass-band curve and control the filter’s performance. The resonator utilizes a special type of dielectric material which is used to create a very precise resonance frequency, and as a result create a very accurate output response. The resonator also acts as a noise filter, helping to reduce any undesirable noise in the input signal.

Finally, the filter is tuned and aligned using a special calibration procedure. This involves adjusting the various inductors and capacitors, as well as the resonator dielectric material, to achieve the desired frequency response. Once the filter is calibrated, it is ready to be used in the desired application.

Conclusion

The LFD212G45DP4A189 is an extremely versatile RF filter that is suitable for a variety of applications. Its four-pole design, based on a Butterworth filter, offers exceptional pass-band shaping capabilities, while the resonator helps to reduce any noise components in the signal. The filter is tuned and aligned using a special procedures, and once it is set up it is ready for use in wireless communications, low noise amplifiers and other signal isolation applications.

The specific data is subject to PDF, and the above content is for reference