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Fiber Bragg-grating true time-delay systems: discrete-grating array 3-b delay lines and chirped-grating 6-b delay lines

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6 Author(s)
Molony, A. ; Dept. of Electr. & Electron. Eng. & Appl. Phys., Aston Univ., Birmingham, UK ; Lin Zhang ; Williams, J.A.R. ; Bennion, I.
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We describe wavelength-addressed 3- and 6-b fiber-optic true time-delay (TTD) lines implemented using ultraviolet-inscribed Bragg gratings. The 3-b delay line is fabricated from an array of discrete- and uniform-period Bragg gratings, and a minimum time delay of 9.09 ps is selectable, making it suitable for phased-array antenna (PAA) beamforming control at RF frequencies of up to about 3 GHz with 10° phase resolution. The 6-b delay line is fabricated using a chirped-period Bragg grating, and is suitable for beamforming control at RF frequencies of up to ~48 GHz, with 10° phase resolution

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:45 ,  Issue: 8 )

Date of Publication:

Aug 1997

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