Rejection 230-1002MHz Pass Band 5-210MHz CATV Low Pass Filter

Features:

1. High rejection, low pass, and excellent return loss

2. Solid machined brass housing with nickel plating

3. 100% quality inspection.

working principle

An ideal bandpass filter should have a completely flat passband with no amplification or attenuation in the passband.

And all frequencies outside the passband are completely attenuated. In addition, the transition outside the passband is done in a very small frequency range.

In fact, there is no ideal bandpass filter. The filter is not able to completely attenuate all frequencies outside the desired frequency range, especially outside the desired passband, a range that is attenuated but not isolated. This is often referred to as the roll-off phenomenon of the filter and is expressed in dB of the attenuation amplitude per decade. In general, the filter is designed to ensure that the roll-off range is as narrow as possible, so that the performance of the filter is closer to the design. However, as the roll-off range becomes smaller and smaller, the passband becomes flatter and begins to “ripple”. This phenomenon is especially noticeable at the edges of the passband, an effect known as the Gibbs phenomenon.

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