Off-axis measurements on a mm-wave optically controlled lens antenna

T. F. Gallacher, R. Søndenå, D. A. Robertson, G. M. Smith

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We present initial experimental data demonstrating the off-axis scanning performance and beam fidelity of a range of optically controlled transmission-type photo-injected Fresnel zone plate antenna (tx-piFZPA) designs at 94 GHz, based on a novel architecture. Several tx-piFZPA designs were characterized at a range of off-axis beam locations, up to 45° from boresight. Initial results indicate scan losses up to 5 dB at 10° deflection and increasing up to 12 dB at 45° deflection, across several tx-piFZPA designs. In addition, measured tx-piFZPAs have demonstrated highly repeatable and precise beam control, achieving a minimum pointing resolution of Δθ = 0.0005°. The piFZPA method proves to be a promising cost-effective nonmechanical beam-steering solution for high millimeter- and terahertz-frequency applications.

Original languageEnglish
Article number2288605
Pages (from-to)1520-1522
Number of pages3
JournalIEEE Antennas and Wireless Propagation Letters
Publication statusPublished - 2013


  • Beam steering
  • Beamforming
  • Optically controlled antenna
  • Photo-injected Fresnel zone plate antenna (piFZPA)
  • Terahertz imaging


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