A 21.4 MHz crystal filter is an electronic component used primarily in radio communication systems to select or reject specific frequency signals. This filter utilizes the piezoelectric properties of quartz crystals, which resonate at precise frequencies.

• Frequency: The filter is designed to operate at a center frequency of 21.4 MHz, making it suitable for various amateur radio operations, including HF (high frequency) bands.

• Selectivity: It provides high selectivity, allowing for the attenuation of unwanted signals and noise, which enhances the clarity and quality of the desired signal.

• Insertion Loss: A well-designed crystal filter will exhibit low insertion loss, ensuring that the desired signal passes through with minimal attenuation.

• Bandwidth: The bandwidth of a crystal filter can be narrow, which is advantageous for rejecting off-frequency signals and improving the overall performance of the communication system.

Specifications

Dimension

Applications:

Amateur Radio: Commonly used in transceivers and receivers to filter out adjacent channel interference.

Communication Systems: Employed in various RF applications, including telemetry and data transmission.

Signal Processing: Utilized in designs that require precision filtering for stable signal processing.

Overall, a 21.4 MHz crystal filter is an essential component for enhancing signal quality in radio frequency applications, contributing to clearer communication and improved system performance.

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