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Optical Engineering

Silicon-photonics-based wideband radar beamforming: basic design
Author(s): Sasan Fathpour; Nabeel A. Riza
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Paper Abstract

Proposed is silicon-photonics-based phased array antenna beamforming for high-resolution long-range radars with wide instantaneous radio frequency (rf) bandwidth. Specifically, the proposed silicon-photonics beamformer platform offers the potential for cost-effective monolithic chip-scale integration of photonic delay lines, 2×2 optical switches, variable optical attenuators, and optical amplifiers that form the base unit of a rf transmit/receive array signal processor. In effect, the proposed silicon-photonics devices empower the design of a powerful proposed photonic beamformer with one time-delay unit per antenna element. Device-level designs studies are shown that promise meeting the high-resolution radar mission-critical requirements via time delays of up to 2.5 ns, switching times of less than 100 ns, optical isolations as good as 50 dB, and optical gains of up to 6 dB. Longer delays are achieved off chip using optical fibers.

Paper Details

Date Published: 1 January 2010
PDF: 7 pages
Opt. Eng. 49(1) 018201 doi: 10.1117/1.3280286
Published in: Optical Engineering Volume 49, Issue 1
Show Author Affiliations
Sasan Fathpour, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Nabeel A. Riza, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)

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