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Type J Diplexer/Low Noise Amplifier

Type J Diplexer/Low Noise Amplifier

The Diplexer/Low Noise Amplifier (DLNA) is a critical element of an aircraft’s satellite communications system, allowing simultaneous transmission and reception of satellite signals.

Beginning in Q4 2022, the U.S. Federal Communications Commission (FCC) has authorized the use of critical spectrum previously dedicated to satellite communications to deploy ATCt/5G networks across the country using the L-Band radio spectrum. This spectrum overlaps the “receive” band of the Inmarsat L-Band spectrum used for safety services and other essential communications, which can cause interference or service disruption to L-Band communications on commercial, business, and military aircraft. 

In 2020, the Federal Communications Commission authorized the use of radio spectrum previously dedicated to satcom to be used by ATCt/5G terrestrial networks being built across the US. This spectrum allocated for terrestrial networks overlaps the receive band of Inmarsat L-Band satcom systems, which can cause interference or service disruption to L-band satcom systems on commercial, business, and military aircraft.

Honeywell’s Type J DLNA is designed to protect Class 6 and Class 7 Inmarsat L-Band satellite communications systems from interference caused by new 5G and LTE networks being deployed worldwide.

Key Benefits:

  • ARINC 781-8 compliant
  • RTCA DO-262, DO-178 Certified
  • Compatible with all Inmarsat approved Class 6 or 7 Satcom terminals
  • Drop-in replacement for all legacy DLNAs
  • Automatic detection of interferers with autonomous switching to the maximum available bandwidth
  • Retrofit and forward fit compatible with all Inmarsat Class 6 and Class 7 systems, including but not limited to Honeywell’s AMT-1800, AMT-3500, AMT-50, AMT-700 and AMT-3800 antennas
  • Supports all Inmarsat SwiftBroadband services and legacy Classic services


  • 11.1” x 7.76” x 2”
  • 8 lbs max
  • Dual Power Supply: 115VAC, 400 Hz/DC +28V
  • No external forced air cooling required

Resources  (1)
Resources  (1)
Type J Diplexer/Low Noise Amplifier
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