Retrodirective Array Performance in the Presence of Near Field Obstructions

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7 Citations (Scopus)


We investigate the situation where there are obstructing elements present in the near field of a retrodirective array. We describe three scattering cases, (1) by an array of straight wires, (2) by low loss medium density fibre board partially obscuring the array, and (3) by concrete blocks, totally and then partially obscuring the array. For all scenarios retrodirective action was shown to be able to provide various degrees of automatic compensation for loss in gain relative to that which would have occurred for a conventional (non-retrodirective) array in the presence of the same scattering screens. Gain improvements of up to 10 dB were observed when the retrodirective array was used. In addition we show how the induced variation of received and re-transmited amplitudes across the array, caused by the scattering screens, is the principle mechanism causing deterioration of the retrodirective arrays monostatic response.
Original languageEnglish
Article number5361380
Pages (from-to)982-986
Number of pages5
JournalIEEE Transactions on Antennas and Propagation
Issue number3
Publication statusPublished - Mar 2010

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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