Tunable Bandpass Cavity Filters (UF9978)

Tunable Bandpass Cavity Filters (UF9978)

Using over 50 years of high performance RF filter design and manufacturing experience, MtronPTI can provide field tunable bandpass cavity filters that could be used to tune desired signals while rejecting interfering signals in Air Navigation Systems Receivers.


  • High Q
  • Low Insertion Loss
  • Better Selectivity
  • Power Handling
  • Excellent out of band performance


  • TACAN/DME Air Navigation Systems
  • Instrumentation

General & Electrical Requirements

  • Passband Frequency Range: 1025 to 1150MHz min
  • Passband: Fc+/- 0.2MHz minimum
  • Passband Variation: 0.25dB maximum
  • Passband Return loss: 14dB maximum
  • 3dB Bandwidth: 4MHz maximum
  • Insertion Loss @ tuned frequency: 2.0dB maximum, 1.5dB typical
  • Stop-Band Attenuation:
    • 80dB minimum from 5MHz to Fc-63MHz
    • 80dB minimum from Fc+63MHz to 2800MHz
  • Input Power: 50W average maximum
    • Out of band signals (+/- 63MHz from Fc):  1000W peak
      • (4uSec Pulse width, 5% duty maximum.)  
    • Tuning Method: Screw Tuning
    • RF Impedance: 50 ohms