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Opto-VLSI-Based Beamformer for Radio-Frequency Phased-Array Antennas

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5 Author(s)
Feng Xiao ; Centre for MicroPhotonic Syst., Edith Cowan Univ., Churchlands, WA, Australia ; Juswardy, B. ; Alameh, K. ; Shilin Xiao
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An Opto-VLSI-based tunable beamformer for radio frequency (RF) smart antennas is reported and its concept is demonstrated. RF beam steering is achieved by uploading appropriate phase holograms onto the Opto-VLSI processor so that RF true-time delays (TTDs) are independently generated for each element of the antenna array by simply using several erbium-doped fiber amplifier (EDFA) loops to realize independent tunable fiber lasers in conjunction with a dispersive optical fiber. Experimental results demonstrate RF beam steering up to 30° with a 4-element linear patch antenna array operating at 1.85 GHz.

Published in:

Photonics Journal, IEEE  (Volume:4 ,  Issue: 3 )