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Proceedings Paper

Discrete-chirped fiber Bragg grating prism for wideband true-time--delay unit
Author(s): Yunqi Liu; Jiangliang Yang; Jianping Yao
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Paper Abstract

A fiber grating prism consisting of a chirped grating delay line and three delay lines with thirteen discrete fiber Bragg gratings is fabricated and experimented. The system comprises a chirped grating for short time delays and three discrete Bragg grating arrays for long time delays. The introduction of the chirped grating delay line enables the system to work for beamforming at higher microwave frequencies. The experimental results of the time delay measurements agree well with the theoretical calculations. Based on the experimental data, the radiation patterns of a 4-elements array are calculated and analyzed. This fiber grating prism can provide four-channel time-delayed signals that can be fed to an antenna array to achieve beam scanning at different radiation angle. The beampointing direction of the system is determined by the grating spacing and independent of the microwave frequency. The proposed true- time delay unit with 4 X 13 phased array steerer is suitable for beamforming at frequencies up to 6 GHz.

Paper Details

Date Published: 27 December 2001
PDF: 8 pages
Proc. SPIE 4490, Multifrequency Electronic/Photonic Devices and Systems for Dual-Use Applications, (27 December 2001); doi: 10.1117/12.455416
Show Author Affiliations
Yunqi Liu, Nanyang Technological Univ. (Singapore)
Jiangliang Yang, Nanyang Technological Univ. (Singapore)
Jianping Yao, Nanyang Technological Univ. (Canada)

Published in SPIE Proceedings Vol. 4490:
Multifrequency Electronic/Photonic Devices and Systems for Dual-Use Applications
Paul S. Idell; Andrew R. Pirich; Stanley R. Czyzak; Paul L. Repak; Paul S. Idell; Stanley R. Czyzak, Editor(s)

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