8-Inch Cavity Pass-Reject Airband Filter

112-137 MHz, 8-inch cavity pass-reject, 0.3-2 dB tunable IL, VSWR < 1.5:1, 19-inch rack.

Frequency

112–137 MHz
Power

3 W
Insertion loss

< 0.3 dB
Connector

N-Female
Weight

5 kg

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Specifications

Electrical

Frequency range	112–137 MHz
Power handling	3 W
Insertion loss	<0.3 dB
VSWR (max)	1.5
Impedance	5 Ω

Mechanical

RF connectors	N-Female
Weight	5 kg
Dimensions (H × W × D)	800 × 200 × 200 mm

Configuration

Cavity Count	1
Cavity Topology	Pass-Reject
Cavity Diameter Inch	8
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

8-inch cavity yields high Q-factor and sharp pass-reject response
02

Tunable insertion loss across the 0.3-2 dB range
03

19-inch rack mount, 5 kg chassis

Technical brief

## Construction
Large 8-inch high-Q cavity tuned for the airband (112-137 MHz). Pass-reject topology delivers a sharp notch at the unwanted carrier while preserving the wanted carrier with low insertion loss.
## Where this fits
ATC ground stations and aviation repeater sites needing rejection of an adjacent or co-channel emitter without sacrificing receiver sensitivity.