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I-Band Transponder

Communication, Navigation & Identification

APITech's I-Band Transponder System makes use of any I-Band surveillance radar, both for interrogation and for reception of the coded transponder replies. By transmitting any one of 16 different coded reply sequences, friendly aircraft can individually identify themselves to the controlling radar. Upon reception, the transponder reply is filtered from the radar echo and is channelled to the RRB Receiver.

With the addition of Video Code Suppression Units, the code information may be removed from a video feed while retaining the essential target enhancement. This switchable feature can reduce display clutter in high target environments.

The I-Band Transponder includes a built in test facility to prove both receive and transmit functions for operator confidence.


  • The I-Band Transponder System provides a highly effective means of locating, identifying and providing navigational assistance for a variety of aircraft outside normal radar coverage and range.
  • The system is effectively employed to provide accurate surveillance, tracking and approach control information, not only at low altitudes and beyond the normal radar horizon, but also at close range, in bad weather and in severe clutter environments.
  • While being more accurate, physically robust and more cost effective then competitive secondary radar systems, the RF2M Microwave Ltd system is also less complex and easier both to install and to support operationally.


  • Safety of Life
  • Close range, precision approach / control
  • Long range navigation and control
  • Search and rescue
  • Individual identification of aircraft
  • Enhanced radar track / position reporting
  • Oil rig identification / navigation
  • Coastal navigation and surveillance
  • Air-to-Air identification / surveillance
  • Marine navigation / beacon systems