A hybrid active-passive radar system concept for extending target detection range


  1. Brookes, D.
  2. Wong, S.
  3. Jassemi-Zargani, R.
  4. Kim, B.
Corporate Authors
Defence Research and Development Canada, Ottawa Research Centre, Ottawa ON (CAN)
A hybrid active-passive radar system is proposed to extend the target detection range of an air surveillance system. Passive sensing is employed to exploit the illumination power of the radar system. This scheme makes use of the radar’s illumination power propagating to the maximum Line-Of-Sight (LOS) distance to monitor the target echoes reflected at this extended range by the passive sensors. In effect, the passive receivers are tasked to pick up the target echoes well before the primary active radar system. A particular application of this system concept is point defence against cruise missiles threatening the critical infrastructure assets of urban areas. The line-of-sight distance that the radar’s illuminating power can reach is often substantially greater than the radar’s designed detection range. A passive sensor system can be placed farther forward, near the radar’s LOS illumination range, to provide a “trip-wire” warning which can also be used to cue the radar where to focus the search, and to point a defensive weapon system in the direction of the incoming target is incoming to provide a better chance of success in mitigating the threat. A model of a passive sensing system working in conjunction with an air-surveillance radar system has been developed. Results indicate that the add-on passive system can work effectively to extend the target detection range, augmenting the capability of the radar system against targets with very low radar cross sections s

Il y a un résumé en français ici.

Radar;multifunction phased array radar;Radar Architecture;radar range extension;Time-Difference-Of-Arrival;TDOA;Frequency Difference of Arrival;FDOA;MPAR;passive receiver;system
Report Number
DRDC-RDDC-2019-R027 — Scientific Report
Date of publication
01 Mar 2019
Number of Pages
Electronic Document(PDF)

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