Optical true time-delay feeder for X-band phased array antennas composed of 2x2 optical MEMS switches and fiber delay lines

We proposed an optical true time-delay (TTD) feeder for X-band linear phased array antennas (PAAs), which possesses high-speed beam scan capability by selecting different lengths of fiber delay lines with fast 2x2 optical microelectromechanical system switches. For proof of concept, a 3-bit optical...

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Bibliographic Details
Published in:IEEE photonics technology letters 2004-05, Vol.16 (5), p.1364-1366
Main Authors: Shin, Jong-Dug, Lee, Back-Song, Kim, Boo-Gyoun
Format: Article
Language:English
Online Access:Get full text
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Summary:We proposed an optical true time-delay (TTD) feeder for X-band linear phased array antennas (PAAs), which possesses high-speed beam scan capability by selecting different lengths of fiber delay lines with fast 2x2 optical microelectromechanical system switches. For proof of concept, a 3-bit optical TTD has been built for a 10-GHz linear PAA composed of two antenna elements. Experimental results show that the maximum time-delay error is less than 0.2 ps, corresponding to a radiation angle error of less than 0.84 deg , which is within the equipment resolution. We have also designed a 10-GHz linear PAA composed of eight microstrip patch antenna elements driven by the proposed TTD. The radiation patterns of this PAA have been obtained by simulation.
ISSN:1041-1135
DOI:10.1109/LPT.2004.826083