Features:
- High Stopband
- Rejection Small Size
In a bandpass filter, the bandwidth is determined by two cutoff frequencies, so signals above and below the bandpass range need to be filtered simultaneously. First, the input signal passes through the high-pass filter to filter out the signal below the bandpass range; Then, the signal above the bandpass range is filtered out through the low-pass filter. The final output carries a communication signal, that is, a signal between two cut-off frequencies. Therefore, the bandpass filter is also called the high-low pass filter.
1. Only frequency signals within a specific range are allowed to pass through, while filtering or weakening other frequency signals.
2. When passing through signals within the frequency band, a higher gain can be achieved.
3. Usually, one or more capacitors, inductors, resistors, and other components are used to construct a bandpass filter.
1. Radio communication: In radio communication, bandpass filters can be used to limit signal bandwidth, avoid signal interference and spectrum pollution.
2. Signal processing: In signal processing, bandpass filters can be used to filter out unwanted frequency signals, retaining only the signals within the desired frequency band.
3. Audio processing: Bandpass filters are widely used in audio processing to weaken unwanted noise and interference signals, thereby improving the quality of audio.
4. Biomedical signal processing: In biomedical signal processing, bandpass filters can be used to extract frequency signals of interest and filter out noise or other interfering signals.
Qualwave supplies high stopband rejection band pass filters in a very wide frequency range up to 170GHz. The band pass filters are widely used in many applications.