Off-Axis Measurements on a mm-Wave Optically Controlled Lens Antenna

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 character...

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Bibliographic Details
Published inIEEE antennas and wireless propagation letters Vol. 12; pp. 1520 - 1522
Main Authors Gallacher, T. F., Sondena, R., Robertson, D. A., Smith, G. M.
Format Journal Article
LanguageEnglish
Published IEEE 2013
Subjects
Beam steering
Beamforming
Biomedical optical imaging
Fresnel reflection
Lenses
Optical diffraction
Optical imaging
Optical sensors
optically controlled antenna
photo-injected Fresnel zone plate antenna (piFZPA)
terahertz imaging
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Summary: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 = 0.005°. The piFZPA method proves to be a promising cost-effective nonmechanical beam-steering solution for high millimeter- and terahertz-frequency applications.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2013.2288605