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Proceedings Paper

Design of photonic true-time-delay networks for radar application
Author(s): K. S. Swaminathan; Talabuttala Srinivas; Ananth Selvarajan
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Paper Abstract

Photonic techniques offer several advantages in microwave systems and applications. Optical method of generating time delay of a microwave signal for beam forming and beam steering an antenna array has been an important application.1 The advantages are in terms of higher resolutions and bandwidth. In this paper we present an optical integrated circuit that forms a part of optical true time delay network. The circuit consists of different segments of curved optical waveguides selected by electro-optic switching on a lithium niobate substrate. The design is for a 16-element antenna array with 4-bit beam forming resolution. Optimisation of delay time lengths with respect to time delay is done. Also analysis of errors in beam steering angle and time delay due to variations in curved waveguide arc lengths and cross talk in optical directional coupler switches are also presented.

Paper Details

Date Published: 15 December 2000
PDF: 7 pages
Proc. SPIE 4087, Applications of Photonic Technology 4, (15 December 2000); doi: 10.1117/12.406404
Show Author Affiliations
K. S. Swaminathan, Indian Institute of Science (India)
Talabuttala Srinivas, Indian Institute of Science (India)
Ananth Selvarajan, Indian Institute of Science (India)


Published in SPIE Proceedings Vol. 4087:
Applications of Photonic Technology 4
Roger A. Lessard; George A. Lampropoulos, Editor(s)

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