Dispersion-enhanced photonic crystal fiber array for a true time-delay structured X-band phased array antenna

Tunable optical true time-delay modules based on highly dispersive photonic crystal fibers (PCFs) are demonstrated to provide continuous radio-frequency squint-free beam scanning for an X-band (8-12 GHz) phased array antenna system. The dispersion of the fabricated PCF is as high as -600 ps/nm /spl...

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Bibliographic Details
Published in:IEEE photonics technology letters 2005-01, Vol.17 (1), p.187-189
Main Authors: Yongqiang Jiang, Howley, B., Zhong Shi, Qingjun Zhou, Chen, R.T., Chen, M.Y., Brost, G., Lee, C.
Format: Article
Language:English
Subjects:
Antenna arrays
Antennas
Arrays
Beams (radiation)
Delay effects
Dispersion
Laser beams
Laser tuning
Optical arrays
Optical true time delay (TTD)
phased array antenna (PAA)
Phased arrays
photonic crystal fiber (PCF)
Photonic crystal fibers
Photonic crystals
Radio frequency
Scanning
Tunable circuits and devices
Tuning
wavelength tuning
X-band
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Summary:Tunable optical true time-delay modules based on highly dispersive photonic crystal fibers (PCFs) are demonstrated to provide continuous radio-frequency squint-free beam scanning for an X-band (8-12 GHz) phased array antenna system. The dispersion of the fabricated PCF is as high as -600 ps/nm /spl middot/ km at 1550 nm. The time delay is continuously tunable from -31 to 31 ps between adjacent delay lines by tuning the laser wavelength continuously from 1528 to 1560 nm. The far field radiation patterns of a 1/spl times/4 subarray were measured from -45/spl deg/ to 45/spl deg/ scanning angles. Squint-free operation is experimentally confirmed.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2004.838623