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Proceedings Paper

Optically controlled phase-shifter for antenna beam-forming
Author(s): Mohamed El Khaldi; Florence Podevin; Anne Vilcot
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Paper Abstract

We propose here to apply the technique of the optical control of microwave devices to perform phase-shifting for microstrip phased arrays. The physical principle used is the photoconductive effect which enables the creation of a variable microwave load, when a gap in a line is illuminated with an optical signal of adequate wavelength. This principle is applied on a hybrid microwave ring. We have designed a phase-shifter with continuously varying phase and quasi-constant |S21|, with few return losses. The measurements have given interesting results. A low cost and small size microstrip phased array antenna has been designed. By illuminating the phase-shifter under different optical powers, the main beam can be scanned in the H-plane continuously from -25° to 25°.

Paper Details

Date Published: 5 October 2005
PDF: 12 pages
Proc. SPIE 5971, Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics, 597129 (5 October 2005); doi: 10.1117/12.628823
Show Author Affiliations
Mohamed El Khaldi, Institut de Microelectronique, Electromagnetisme et Photonique, CNRS (France)
Florence Podevin, Institut de Microelectronique, Electromagnetisme et Photonique, CNRS (France)
Anne Vilcot, Institut de Microelectronique, Electromagnetisme et Photonique, CNRS (France)


Published in SPIE Proceedings Vol. 5971:
Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics
Roberto A. Morandotti; Harry E. Ruda; Jianping Yao, Editor(s)

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