Airband Dual Ferrite Isolator

112-137 MHz, > 75 dB typical isolation @ +25 °C, 150 W, < 1.0 dB IL, 1.5:1 VSWR.

Frequency

112–137 MHz
Power

15 W
Isolation

> 75 dB
Insertion loss

< 1 dB
Connector

N-Female
Weight

1.2 kg

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Specifications

Electrical

Frequency range	112–137 MHz
Power handling	15 W
Insertion loss	<1 dB
Tx-Rx isolation	>75 dB
VSWR (max)	1.5
Impedance	5 Ω

Mechanical

RF connectors	N-Female
Weight	1.2 kg
Dimensions (H × W × D)	65 × 114 × 160 mm

Configuration

Isolation 25c Db	75
Isolation 0 60c Db	40
Isolation Neg10 0c Db	35
Power W	150
Temperature Range	-10°C to +60°C
Band	airband

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

Airband (112-137 MHz) ferrite isolator
02

Dual-stage construction, > 75 dB typical isolation at +25 °C
03

150 W continuous, < 1.0 dB insertion loss

Technical brief

Airband variant

Aviation-band variant of the dual-stage isolator. Same construction and specifications as VHF and UHF siblings, retuned for 112-137 MHz.

Solves these problems

Protecting transmitter PA stages from reflected power and inter-system intermod

A failed antenna, a wet feedline connector, or a strong nearby transmitter can drive reflected power back into the PA — and at multi-carrier sites, two transmitters mixing in a non-linear element generate intermod products that fall back into your receiver band.