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Optical Engineering

True-time-delay modules based on a single tunable laser in conjunction with a waveguide hologram for phased array antenna application
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Paper Abstract

A wavelength-controlled continuous beam-steering four-element X-band (8- to 12-GHz) phased array antenna system is presented. The system is based on the continuously tunable optical true-time-delay technique. Dispersion-enhanced waveguide holograms were proposed and used to fabricate the optical true-time-delay devices. The devices are characterized both theoretically and experimentally. The wavelength of a laser was tuned within the system to get continuously tunable true time delay. The time delay was measured for a wavelength tuning range from 1537 to 1547 nm in 10-nm steps. The far-field radiation patterns of the antenna system were measured at 9 and 10.3 GHz, and they showed no beam squint. The true-time-delay formation idea presented here is suitable for not only X-band, but also for higher microwave frequencies, such as K-band.

Paper Details

Date Published: 1 August 2005
PDF: 7 pages
Opt. Eng. 44(8) 084301 doi: 10.1117/1.2009766
Published in: Optical Engineering Volume 44, Issue 8
Show Author Affiliations
Zhong Shi, The Univ. of Texas at Austin (United States)
Lanlan Gu, The Univ. of Texas at Austin (United States)
Brie Howley, The Univ. of Texas at Austin (United States)
Yongqiang Jiang, The Univ. of Texas at Austin (United States)
Qingjun Zhou, The Univ. of Texas at Austin (United States)
Ray T. Chen, The Univ. of Texas at Austin (United States)
Maggie Yihong Chen, Omega Optics, Inc. (United States)
Xiao-dong Wang, Omega Optics, Inc. (United States)
Harold R. Fetterman, Univ. of California/Los Angeles (United States)
George A. Brost


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