FI212C245072-T

RF Filters

FI212C245072-T is an RF filter designed for wide range of applications. It is composed of a waveguide, a directional coupler, and stepped impedance matching circuits and has been optimized for high-frequency communications systems. The waveguide is an integral part of filter design, which provides the necessary blocks for the transmission of the signal.

Application Field

The FI212C245072-T RF filter is mainly used for wireless LAN communication systems, radio base station communication systems, satellite systems, GPS systems, and even automotive applications. The filter is designed to improve the communication reliability of the signal by reducing the noise interference from the surroundings. It is especially effective in high-frequency communications where the noise interference could be 4 times higher than in other applications.

Working Principle

The FI212C245072-T filter works by using the waveguide to guide the signal towards the coupler. The coupler is responsible for extracting the signal from the waveguide and then separating it into two parts – the output and the input. The input signal is then directed through the stepped impedance circuit which attenuates both the input and output signals.The filter also uses the concept of a quarter-wavelength transformer, where the length of the waveguide is optimized to allow for the transmission of the desired frequencies. The waveguide is designed to provide a wider bandwidth, while still ensuring that the signals remain within the necessary bandwidth range. In addition, the waveguide also minimizes any signal reflections, which can cause distortion.The stepped impedance matching circuit then removes the residual standing wave ratio (SWR). The SWR is the difference between the input and output voltages of the signal, and if it is too high it can cause distortion and decrease the communication quality. By removing the SWR, the filter ensures that the communication signal is as clear as possible.Finally, the filter is designed to provide low-loss signal transmission, meaning that it ensures that the signal is transmitted at a constant level even when there are fluctuations in the ambient noise interference.