LFD212G45DP3A188

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RF Filters are commonly used in wireless communication circuits and wireless signal transmission and reception systems. They are used to attenuate frequencies outside of the target range that are not related to the target signals, proportionally increasing the target signal to noise ratio.

The LFD212G45DP3A188 is a flat frequency dB High Pass Filter, meaning it has a narrow passband in high frequencies while attenuating lower frequencies. It is based on a surface acoustic wave (SAW) technology filter platform developed by SAWTEK. The filter is designed for use in base station applications.

The LFD212G45DP3A188 operates from a passband frequency of 1490-1820 MHz and its 25 dB passband of attenuation has a highest insertion loss of 0.4 dB at 1920 MHz. It has an input impedance of about 120 Ω and a maximum allowed power of 20 dBm. It weighs 4.4 grams, has a cut-off frequency of 1490 MHz and a minimum insertion loss of 0.8 dB at 1685 MHz.

The working principle of the filter depends on the cutting edge SAW technology which is the basis for the surface acoustic wave filter platform used in the filter. It uses wave behavior to form the filter. A surface wave forms due to the interference of signals reflected from two opposite boundaries. If the crystal between these two boundaries is properly designed, then each segment of this wave will pass through the crystal body and the reflection from the boundaries will be decreased.

In this LFD212G45DP3A188, the SAW filter platform employs a resonator to convert electrical signals to acoustic signals and vice versa. As a result, the high-frequency input signal generates an acoustic wave that is reflected a number of times from the walls of the resonator and is subjected to a certain degree of attenuation. This attenuation acts as a filter for the input signal, attenuating unwanted frequencies outside of the passband range, while allowing the target frequency to pass through. In this way, the signal to noise ratio is improved.

In conclusion, the LFD212G45DP3A188 is an ideal solution for base station applications. Its SAW filter technology provides excellent signal purity and narrow passband characteristics, helping reduce interference and noise, and thus improving the signal to noise ratio. It also has a robust and reliable design, making it very durable and suitable for a wide range of applications.

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