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Continuously delay-time tunable-waveguide hologram module for X-band phased-array antenna

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6 Author(s)
Shi, Zhong ; Dept. of Electr. & Comput. Eng., Univ. of Texas, Austin, TX, USA ; Jiang, Yongqiang ; Howley, Brie ; Yihong Chen
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Tunable optical true time-delay modules based on a dispersive waveguide hologram are presented to provide continuous radio-frequency beam scanning for an X-band (8-12 GHz) phased-array antenna system. The true time-delay modules operating in the 1550-nm region were fabricated with continuously tunable time delays from 5 to 64 ps. The far-field radiation patterns were measured with different delay combinations and the continuity of the scanning angles from 35/spl deg/ to 55/spl deg/ was experimentally confirmed at X-band frequencies.

Published in:

Photonics Technology Letters, IEEE  (Volume:15 ,  Issue: 7 )