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ALUNOR RF

Dual-Cavity Bandpass Airband Filter (8-Inch)

112-137 MHz, dual cavity bandpass, 0.5-2 dB IL tunable, > 18 dB return loss, 350 W.

  • Frequency
    112–137 MHz
  • Power
    35 W
  • Insertion loss
    < 0.5 dB
  • Connector
    N-Female
  • Weight
    13 kg
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Specifications

Electrical
Frequency range 112–137 MHz
Power handling 35 W
Insertion loss <0.5 dB
VSWR (max) 1.5
Impedance 5 Ω
Mechanical
RF connectors N-Female
Weight 13 kg
Dimensions (H × W × D) 1050 × 482 × 267 mm
Configuration
Cavity Count 2
Cavity Topology Bandpass (cascaded)
Cavity Diameter Inch 8
Return Loss Db 18
Frequency Stability 0.8 ppm/C
Temperature Range -30C to +60C
Mounting 19-inch rack
Verified 2026-05-06 · ALUNOR RF Engineering · source: ALUNOR RF Technical Catalogue 2026-01-21

All measurements at 25 °C, 50 Ω, unless otherwise noted.

Why this product

  • 01

    Two cavities cascaded for > 18 dB return loss

  • 02

    Up to 1.0 dB IL at 350 W continuous

  • 03

    Compact 13 kg / 1050 mm chassis

Technical brief

## Construction
Two 8-inch high-Q cavities cascaded for sharper bandpass selectivity than the single-cavity variant. Return loss > 18 dB; insertion loss tunable 0.5-2 dB.
## Where this fits
Aviation receiver sites needing aggressive front-end filtering, collocation environments where out-of-band rejection drives sensitivity loss.

Need a custom configuration?

Talk to an application engineer about variants, custom tuning, or integration into an existing repeater chassis.