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Photonically-enabled RF front-end for wideband flexible down-conversion.

Anjali Agarwal, James M Dailey, Paul Toliver

    Optics Express
    |April 7, 2017
    PubMed
    Summary
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    We developed a flexible radio frequency (RF) photonics down-converter for signal identification. This device folds a wide RF band into a common intermediate frequency (IF) band, enhancing signal analysis.

    Area of Science:

    • Photonics
    • Radio Frequency (RF) Engineering
    • Signal Processing

    Background:

    • Traditional RF signal processing faces challenges with wide bandwidths.
    • Efficient down-conversion is crucial for identifying specific signals within broad RF spectra.
    • Photonics offers novel solutions for high-frequency signal manipulation.

    Purpose of the Study:

    • To demonstrate a flexible RF photonics down-converter.
    • To enable spectral folding of a 2-18 GHz RF band into a common 2 GHz intermediate frequency (IF) band.
    • To allow reconfiguration for selective down-conversion of specific sub-bands.

    Main Methods:

    • Development of a flexible RF photonics down-converter architecture.
    • Experimental implementation of spectral folding mode.

    Related Experiment Videos

  • Experimental implementation of selective down-conversion mode.
  • Performance analysis including sensitivity and spurious-free dynamic range.

    • Main Results:

    • Demonstrated spectral folding of a 2-18 GHz RF band into a 2 GHz IF band.
    • Achieved a sensitivity of -42 dBm in the spectral folding mode.
    • Measured a spurious-free dynamic range of 103 dB.Hz2/3 in the spectral folding mode.
    • Successfully demonstrated reconfiguration for selective down-conversion.

    Conclusions:

    • The flexible RF photonics down-converter effectively enables spectral folding for signal identification.
    • The system's performance metrics, including sensitivity and dynamic range, are suitable for practical applications.
    • The demonstrated flexibility allows for tailored signal analysis by selective down-conversion.