Optically controlled phased array radar
作者： Nabeel A. Riza
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摘要: A compact, stable, and optically efficient two dimensional spatial light modulator-based electro-optical control system for large (>1000 elements) phase-based phased array antennas uses externally phase-locked lasers to generate respective pluralities of first second beams that are respectively mutually orthogonally polarized. Respective ones the combined pass along collinear coincident paths form a plurality beams. The frequency difference between which constituent in each beam cause an interference pattern that, upon heterodyne detection optical signal conversion electrical antenna drive signal, provides carrier driving antenna. phase delay is introduced via birefringent-mode nematic liquid crystal pixels selectively one having predetermined linear polarization beam, while other not delayed used as reference microwave/millimeter wave generation interferometric through photodiode. Further, shift unit coupled laser assembly enable intermediate offset be introduced, such during receive cycles radar, output signals generated by processing exhibit desired frequency.
lens.org 参考文章(11)
Nabeel A. Riza, Compact wide tunable bandwidth phased array antenna controller ,(1992)
Nabeel A. Riza, Phased-array antenna controller ,(1992)
T. Day, E. K. Gustafson, R. L. Byer, Active frequency stabilization of a 1.062-μm, Nd:GGG, diode-laser-pumped nonplanar ring oscillator to less than 3 Hz of relative linewidth Optics Letters. ,vol. 15, pp. 221- 223 ,(1990) , 10.1364/OL.15.000221
M. Tamburrini, M. Parent, L. Goldberg, D. Stillwell, Optical feed for a phased array microwave antenna Electronics Letters. ,vol. 23, pp. 680- 681 ,(1987) , 10.1049/EL:19870485
G.J. Simonis, K.G. Purchase, Optical generation, distribution, and control of microwaves using laser heterodyne IEEE Transactions on Microwave Theory and Techniques. ,vol. 38, pp. 667- 669 ,(1990) , 10.1109/22.54938
P.M. Freitag, S.R. Forrest, A coherent optically controlled phased array antenna system IEEE Microwave and Guided Wave Letters. ,vol. 3, pp. 293- 295 ,(1993) , 10.1109/75.244857
W. Ng, A.A. Walston, G.L. Tangonan, J.J. Lee, I.L. Newberg, N. Bernstein, The first demonstration of an optically steered microwave phased array antenna using true-time-delay Journal of Lightwave Technology. ,vol. 9, pp. 1124- 1131 ,(1991) , 10.1109/50.85809
Nabeel A. Riza, Reversible time delay beamforming optical architecture for phased-array antennas ,(1991)
N.A. Riza, An acoustooptic phased array antenna beamformer with independent phase and carrier control using single sideband signals IEEE Photonics Technology Letters. ,vol. 4, pp. 177- 179 ,(1992) , 10.1109/68.122353
Nabeel A. Riza, Optical time delay units for phased array antennas ,(1992)