Retrodirective Antenna Spatial Data Protection

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9 Citations (Scopus)


In this letter, we show how a 2.4-GHz retrodirective array operating in a multipath rich environment can be utilized in order to spatially encrypt digital data. For the first time, we give experimental evidence that digital data that has no mathematical encryption applied to it can be successfully recovered only when it is detected with a receiver that is polarization-matched to that of a reference continuous-wave (CW) pilot tone signal. In addition, we show that successful detection with low bit error rate (BER) will only occur within a highly constrained spatial region colocated close to the position of the CW reference signal. These effects mean that the signal cannot be intercepted and its modulated data recovered at locations other than the constrained spatial region around the position from which the retrodirective communication was initiated.
Original languageEnglish
Article number4815487
Pages (from-to)490-493
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
Issue numbernull
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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