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Design of photonic true-time-delay networks for radar application

Swaminathan, KS and Srinivas, T and Selvarajan, A (2000) Design of photonic true-time-delay networks for radar application. In: Applications of Photonic Technology, 12-16 June 2000, Quebec City, Que., Canada, pp. 241-247.

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Photonic techniques offer several advantages in microwave systems and applications. The optical method of generating the time delay of a microwave signal for beam forming and beam steering an antenna array has been an important application. The advantages are in terms of higher resolutions and bandwidth. We present an optical integrated circuit that forms a part of the 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. Optimization 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

Item Type: Conference Paper
Publisher: SPIE - The International Society for Optical Engineering
Additional Information: Copyright of this article SPIE - The International Society for Optical Engineering
Keywords: antenna phased arrays;beam steering;delays;electro optical switches;integrated optics;microwave photonics;optical crosstalk;optical design techniques;optical directional couplers;optical waveguide components;optimisation;radar antennas;radar applications;waveguide antenna arrays
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 30 Jul 2007
Last Modified: 27 Aug 2008 12:43
URI: http://eprints.iisc.ac.in/id/eprint/10351

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