Abstract

A photonic technique for detecting the angle-ofarrival of broadband microwave signals in phased-array antennas is proposed. Using a photonic microwave filter and measuring the frequency of the notches created by the filter over the broadband signal, it is possible to derive its direction of arrival, even in the presence of several sources. The technique is intended to be used in optical-beamforming networks for phased array antennas. The architecture of the optical-beamforming network will be barely modified adding just a few additional components. Experiments showing the feasibility of the technique are provided.

© 2006 IEEE

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Other (14)

A. J. Seeds, "Microwave photonics", IEEE Trans. Microw. Theory Tech., vol. 50, no. 3, pp. 877-887, Mar. 2002.

H. Zmuda and E. H. Toughlian, Photonic Aspects of Modern Radar, Norwood, MA: Artech House, 1994.

W. Ng, A. Walston, G. Tangonan, J. Newberg, J. J. Lee and N. Berstein, "The first demonstration of an optically steered microwave phased array antenna using true-time delay", J. Lightw. Technol, vol. 9, no. 9, pp. 1124-1131, Sep. 1991.

D. T. K. Tong and M. C. Wu, "A novel multiwavelength optically controlled phased array antenna with a programmable dispersion matrix", IEEE Photon. Technol. Lett., vol. 8, no. 6, pp. 812-814, Jun. 1996.

J. L. Corral, J. Marti, S. Regidor, J. M. Fuster, R. Laming and M. J. Cole, "Continuously variable true time delay optical feeder for phased array antenna employing chirped fiber gratings", IEEE Trans. Microw. Theory Tech., vol. 45, no. 8, pp. 1531-1536, Sep. 1997.

D. T. K. Tong and M. C. Wu, "Transmit/receive module of multiwavelength optically controlled phased-array antennas", IEEE Photon. Technol. Lett., vol. 10, no. 7, pp. 1018-1020, Jul. 1998.

P. J. Matthews, P. L. Liu, J. B. Medberry, M. Y. Frankel and R. E. Esman, "Demonstration of a wide-band fiber-optic nulling system for array antennas", IEEE Trans. Microw. Theory Tech., vol. 47, no. 7, pp. 1327-1331, Jul. 1999.

B. Vidal, J. L. Corral, M. A. Piqueras and J. Martí, "Optical delay line based on arrayed waveguide gratings' spectral periodicity and dispersive media for antenna beamforming applications", IEEE J. Sel. Topics Quantum Electron., vol. 8, no. 6, pp. 1202-1210, Nov./Dec. 2002.

L. Godara, "Applications of antenna arrays to mobile communications, Part II: Beamforming and direction of arrival considerations", Proc. IEEE, vol. 85, no. 8, pp. 1195-1245, Aug. 1997.

J. T. Gallo and R. DeSalvo, "Experimental demonstration of optical guided-wave butler matrices", IEEE Trans. Microw. Theory Tech., vol. 45, no. 8, pp. 1501-1507, Aug. 1997.

P. D. Biernacki, A. Ward, L. T. Nichols and R. D. Esman, "Microwave phase detection for angle of arrival detection using a 4-channel optical downconverter", in Proc. Int. Top. Meeting MWP, 1998, Paper TuB2,. pp. 137-140.

S. Tonda-Goldstein, D. Dolfi, A. Monsterleet, S. Formont, J. Chazelas and J. P. Huignard, "Optical signal processing in radar systems", IEEE Trans. Microw. Theory Tech., vol. 54, no. 2, pp. 847-853, Feb. 2006.

J. Capmany, B. Ortega, D. Pastor and S. Sales, "Discrete-time signal processing of microwave signals", J. Lightw. Technol., vol. 23, no. 2, pp. 702-723, Feb. 2005.

W. Zhang, J. A. R. Williams, L. A. Everall and I. Bennion, "Fibre optic radio frequency notch filter with linear and continuous tuning by using a chirped fibre grating", Electron. Lett., vol. 34, no. 18, pp. 1770-1772, Sep. <day>3</day>, 1998.

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