Crystal filters for applications in communications, audio and radar systems
2023-08-29
Crystal filter:
It is a frequency filter that uses the characteristics of the crystal to select or exclude signals within a specific frequency range to filter out unwanted frequency components and improve signal quality.
working principle:
The core component of the crystal filter is the resonant crystal, usually a quartz crystal. Quartz crystal has a mechanical resonance phenomenon, that is, it can vibrate with a large amplitude at a specific frequency. Based on this resonance characteristic, the crystal filter designs a circuit so that only signals near a specific frequency can pass, while signals at other frequencies are suppressed or blocked.
Crystal FilterCrystal Filter
Monolithic Crystal Filter Discrete Crystal Filter
Feature
1. Product classification: There are many types of crystal filters with different application scenarios. They can be divided into conventional crystal filters, discrete crystal filters, monolithic discrete crystal filters, low-frequency crystal filters, narrow-band crystal filters, single-chip crystal filters, and single-chip discrete crystal filters. chip crystal filter, etc.
2. Frequency range: 180kHz-150MHz
3. Advantages:
a. They provide a highly stable center frequency and narrow bandwidth, which can effectively filter out unwanted frequency components, thereby improving signal quality.
b. The response characteristics of the crystal filter are very precise and have good frequency selection performance.
c. Crystal filters can also withstand higher power input and are suitable for various high-performance and demanding application scenarios.
Hangjing crystal filter series
In addition to the above conventional parameters, specifications such as packaging, frequency, bandwidth, insertion loss, and out-of-band suppression can also be customized according to customer needs.
Applications:
Wireless communication:
Crystal filters play an important role in wireless communications. They are commonly used in base stations, radio receivers and transmitters to filter out frequency components from adjacent channels or other sources of interference, ensuring the clarity and reliability of communication signals.
Audio equipment:
Crystal filters are used in audio equipment for audio signal processing to eliminate spurious noise and aliasing problems.
Radar system:
Picture crystal filters are used to selectively receive and process radar signals in specific frequency bands, eliminating interference from other frequencies. This improves the target detection performance and anti-interference ability of the radar system, making it widely used in aviation, marine and military applications.
In summary, crystal filters use the resonance characteristics of crystals to achieve selective transmission of signals within a specific frequency range. They play an important role in fields such as wireless communications, audio processing, and radar systems, improving signal quality, reducing interference, and providing accurate and reliable signal processing capabilities for various application scenarios.
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