1 August 2005 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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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.
Zhong Shi, Lanlan Gu, Brie Howley, Yongqiang Jiang, Qingjun Zhou, Ray T. Chen, Maggie Yihong Chen, Xiao-dong Wang, Harold R. Fetterman, George A. Brost, "True-time-delay modules based on a single tunable laser in conjunction with a waveguide hologram for phased array antenna application," Optical Engineering 44(8), 084301 (1 August 2005). https://doi.org/10.1117/1.2009766
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