Coaxial Cavity Filters

Product Features

• High Q-factor, Low Insertion Loss: Utilizes high-Q coaxial resonant cavities to achieve extremely low in-band insertion loss, with minimal impact on signal quality.
• Steep Out-of-Band Rejection: Provides outstanding out-of-band rejection capabilities, effectively filtering out unwanted frequency components and achieving high selectivity.
• Excellent In-Band Flatness: Maintains good flatness of the signal response within the passband, ensuring distortion-free signal transmission.
• High Power Handling: The robust metallic cavity structure possesses excellent heat dissipation capabilities, enabling it to withstand higher RF power, suitable for high-power transmit applications.
• Good Frequency Stability: The choice of cavity dimensions and materials (typically metals with low temperature coefficients) ensures frequency stability over a wide temperature range.
• High Reliability: The robust and durable structural design ensures long-term stable and reliable operation even in harsh environments.
• Highly Customizable: Filter parameters (such as center frequency, bandwidth, order, out-of-band rejection, connector type, etc.) can be flexibly designed and customized according to specific application requirements.
• Good EMI Shielding: The enclosed metallic cavity structure provides natural EMI/RFI shielding, reducing external interference.

Applications

• Cellular Base Stations (4G/5G): Serves as a critical filter in the RF front-end for precise frequency selection, isolating transmit and receive channels, and suppressing interference from adjacent bands, thereby protecting transceivers.
• Satellite Communication Systems: In ground stations and satellite transponders, used for high-Q, high-power frequency selection and channel filtering.
• Radar Systems: In receiver and transmitter links, used for precise frequency selection to distinguish target signals from noise/clutter, especially in high-power radar.
• Broadcast & TV Transmitters: In high-power television and radio broadcast transmitters, used to ensure signals are transmitted within allocated bands and suppress out-of-band emissions.
• Test & Measurement Equipment: As a reference filter for high-precision frequency selection, providing accurate filtering functions in laboratory and production testing.
• Aerospace & Defense: Applied in airborne and military communication/radar systems where stringent requirements for performance, reliability, and environmental adaptability are essential.
• Microwave Backhaul Links: In point-to-point microwave communications, used for channel separation and combining.
• Medical Equipment: In certain RF-based medical devices, used for precise frequency filtering.