A novel implementation technique of conical scan radar using a programmable phased array

Q. Md Alfred, T. Chakravarty, G. Singh, S. K. Sanyal

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In radar, planar phased array antenna plays vital role in electronic scanning in the azimuth and elevation direction to the horizon. In most operations using planar phased array both the coordinates of azimuth and elevation, are steered electronically. In this paper a conceptual schematic of a phased array antenna with programmable time delay units has been presented. It is shown that by suitably exploiting the time delay matrix one can have electronic beam rotation around the target axis as required in conical scan. Thus both the elevation and azimuth motors in conical scan system are replaced by electronic scanning. Heuristically, we have selected eight consecutive points for beam rotation in a polygon shape and can also be extended almost circular shape by increasing number of array elements and phase shifter (delays) in the delay matrix. The array requires dual control of phase gradient and individual phase values. The whole array is controlled by micro-controller. This presents exciting possibilities in radar operation.

Original languageEnglish
Pages (from-to)881-887
Number of pages7
JournalInternational Journal of Infrared and Millimeter Waves
Issue number10
Publication statusPublished - Oct 2007
Externally publishedYes


  • Azimuth
  • Bit multiplier
  • Conical scan
  • Delay matrix
  • Digital phase shifter
  • Elevation
  • Microcontroller
  • Phased array antenna

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering


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