Theoretical analysis of beam pointing resolution in photonic true time delay units

Jiaqi Qin; Zhaoying Wang; Quan Yuan; Zhenkun Jiang; Chunfeng Ge

doi:10.1117/12.2327123

9 November 2018 Theoretical analysis of beam pointing resolution in photonic true time delay units

Jiaqi Qin, Zhaoying Wang, Quan Yuan, Zhenkun Jiang, Chunfeng Ge

Proceedings Volume 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V; 108260P (2018) https://doi.org/10.1117/12.2327123
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

In recent years, an approach of photonic true-time delay (TTD) unit which employs a linear chirped fiber grating (LCFG) and a tunable multi-wavelength laser (TMWL) for phased array antennas (PAAs) has been reported. In this paper, several key parameters of the LCFG and TMWL are analyzed. The beam-pointing resolution is effected by the parameters including the group delay slope of LCFG, the tuning accuracy of the wavelength spacing of TMWL. The relationship between the beam-pointing angle and the wavelength spacing of TMWL is an inverse trigonometric function. So linear output of the beam-pointing angle could be obtained by tuning the wavelength spacing as sine function. Furthermore, the relationship of the beam-pointing resolution and the beam-pointing angle with different tuning accuracies of the wavelength spacing of TMWL and different group delay slopes of LCFG are also analyzed.

Citation Download Citation

Jiaqi Qin, Zhaoying Wang, Quan Yuan, Zhenkun Jiang, and Chunfeng Ge "Theoretical analysis of beam pointing resolution in photonic true time delay units", Proc. SPIE 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V, 108260P (9 November 2018); https://doi.org/10.1117/12.2327123

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