Optical waveguides – With optical coupler
Reexamination Certificate
2005-05-10
2005-05-10
Ullah, Akm Enayet (Department: 2874)
Optical waveguides
With optical coupler
C385S003000, C385S027000, C385S037000, C359S263000, C359S316000, C359S318000, C359S572000, C342S368000, C342S375000
Reexamination Certificate
active
06891987
ABSTRACT:
A true-time delay feeder for multiple aperture beam steering devices. The feeder comprises a plurality of tunable time delay modules. The tunable time delay modules provide different delays to different beamlets without changing the spectrum of each beamlet. The tunable true-time delay modules provide for temporal synchronization and spatial coherence of the beam front.
REFERENCES:
patent: 3894792 (1975-07-01), Komatsubara et al.
patent: 4240696 (1980-12-01), Tracy et al.
patent: 4639091 (1987-01-01), Huignard et al.
patent: 4736463 (1988-04-01), Chavez
patent: 4813766 (1989-03-01), Keene et al.
patent: 4937539 (1990-06-01), Grinberg et al.
patent: 4953939 (1990-09-01), Epworth
patent: 5013979 (1991-05-01), Birleson
patent: 5018835 (1991-05-01), Dorschner
patent: 5051754 (1991-09-01), Newberg
patent: 5082342 (1992-01-01), Wight et al.
patent: 5093747 (1992-03-01), Dorschner
patent: 5117239 (1992-05-01), Riza
patent: 5202776 (1993-04-01), Gesell et al.
patent: 5233673 (1993-08-01), Vali et al.
patent: 5351127 (1994-09-01), King et al.
patent: 5461687 (1995-10-01), Brock
patent: 5512907 (1996-04-01), Riza
patent: 5623360 (1997-04-01), Gesell et al.
patent: 5774619 (1998-06-01), Bruesselbach
patent: 5943159 (1999-08-01), Zhu
patent: 6137442 (2000-10-01), Roman et al.
patent: 6295395 (2001-09-01), Paek
patent: 6320539 (2001-11-01), Matthews et al.
patent: 6388616 (2002-05-01), Zhou
patent: 6393177 (2002-05-01), Paek
patent: 6466703 (2002-10-01), Ionov
patent: 6760512 (2004-07-01), Pepper
patent: 20020181874 (2002-12-01), Tulchinsky et al.
patent: 20030080899 (2003-05-01), Lee et al.
patent: 0 051 394 (1982-05-01), None
patent: 0 514 857 (1992-11-01), None
patent: 0 664 474 (1995-07-01), None
patent: 59-69732 (1984-04-01), None
patent: 0178200 (2001-10-01), None
Corral, J.L., et al., “Continuously Variable True Time-Delay Optical Feeder for Phased-Array Antenna Employing Chirped Fiber Gratings,”IEEE Transactions on Microwave Theory and Techniques, vol. 45, No. 8, pp 1531-1536 (Aug. 1997).
Corral, J.L., et al., “True Time-Delay Scheme for Feeding Optically Controlled Phased-Array Antennas Using Chirped-Fiber Gratings,”IEEE Photonics Technology Letters, vol. 9, No. 11, pp 1529-1531 (Nov. 1997).
Fu, Z., et al., “Five-Bit Substrate Guided Wave True-Time Delay Module Working up to 2.4 THz with a Packing Density of 2.5 Lines/cm2for Phased Array Antenna Applications,”Opt. Eng., vol. 37, No. 6, pp 1838-1844 (Jun. 1998).
Li, R.L.Q., et al., “High Density Broadband True-Time-Delay Unit on a Single Substrate,”SPIE, vol. 3006, pp 256-263.
Poladian, L., “Graphical and WKB Analysis of Nonuniform Bragg Gratings,”Physical Review E, vol. 48, No. 6, pp 4758-4767 (Dec. 1993).
Trezza, J.A., et al.,Large Format Smart Pixel Arrays and Their Companions. Sanders, a Lockheed Martin Company; IEEE 1998 Aerospace Conference, Mar. 21-28, 1998, 7 pages total.
Ionov Stanislav I.
Sumida David S.
HRL Laboratories LLC
Ladas & Parry LLP
Petkovsek Daniel
Ullah Akm Enayet
LandOfFree
Multi-aperture beam steering system with wavefront... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-aperture beam steering system with wavefront..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-aperture beam steering system with wavefront... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3401404