Cavity Combline Filters

Description

描述

Cavity Combline Filters

 


Product Features

 

  • High Q-factor, Low Insertion Loss: The cavity structure combined with the combline design achieves a very high Q-factor, thereby providing extremely low in-band insertion loss, with minimal impact on signal quality.
  • Steep Out-of-Band Rejection: Possesses excellent out-of-band rejection capabilities, effectively filtering out unwanted frequency components and offering 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 cavity structure typically has good heat dissipation capabilities and robustness, enabling it to withstand higher RF power levels.
  • Good Frequency Stability: The choice of cavity dimensions and materials determines its frequency stability, usually performing stably over a wide temperature range.
  • Compact Size (relative to waveguide): Compared to traditional waveguide filters, combline cavity filters can achieve smaller volume and lighter weight for a given performance.
  • Highly Customizable: Filter parameters (such as center frequency, bandwidth, order, out-of-band rejection, etc.) can be flexibly designed and customized according to specific application requirements.
  • High Reliability: The robust metallic cavity structure ensures long-term stable and reliable operation even in harsh environments.

 

Applications

 

  • Cellular Base Stations (4G/5G): As a critical component in the RF front-end, used to selectively receive and transmit signals in specific frequency bands while suppressing interference from adjacent bands, protecting transceivers.
  • Satellite Communication Systems: In ground stations and satellite transponders, used for frequency selection and channel filtering, handling high power and high Q-factor requirements.
  • Radar Systems: In receiver and transmitter links, used for precise frequency selection to distinguish target signals from noise/clutter.
  • Broadcast & TV Equipment: Utilized in television and radio broadcast transmitters to ensure signals are transmitted within allocated bands and suppress out-of-band emissions.
  • Electronic Warfare & Reconnaissance: In broadband receive and transmit systems, used for precise frequency selection and signal separation.
  • Test & Measurement Equipment: Serves as a reference filter for high-precision frequency selection, providing accurate filtering functions in laboratory and production testing.
  • Microwave Point-to-Point Communication: In microwave backhaul links, used for separating and combining different communication channels.
  • Aerospace & Defense: Applied in airborne and military communication/radar systems where stringent requirements for size, weight, performance, and environmental adaptability are essential.

 

Product Selection Table

cavity combline filters cavity combline filters

Part No.Frequency Range(Hz)Passband Loss(dB)Passband Standing WaveOut Of Band SuppressionVolume (mm3)
BKLLZ-610-670M610~670M0.81.5:1>70dB@570,710MHz160x66x21
BKLLZ-775-882M775~882M11.5:1>70dB@709,949MHz60x38x21
BKLLZ-1340-1485M1340~1485M1.21.5:1>70dB@1227,1598MHz160x38x18
BKLLZ-1590-1735M1590~1735M1.21.5:1>70dB@l447,1847MHz160x38x18
BKLLZ-2700-3100M2700~3100M1.51.5:1>55dB@2300,3500MHz85x21x13
BKLLZ-3900-4500M3900~4500M1.51.5:1>55dB@3600,4800MHz85x17x12
BKLLZ-5100-5700M5100~5700M1.51.5:1>55dB@4800,6000MHz85x15x11
BKLLZ-13.6-18G13.6~18G11.6:1>70dB@11,20.6GHz70x13x9
BKLZ-2.7-3.5G2.7~5G0.51.3:1>50dB@5GHz32x20x11
>35dB@10GHz

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