Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2005-06-17
2009-08-18
Anderson, Matthew D (Department: 2618)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C342S149000, C343S818000, C343S820000, C343S822000
Reexamination Certificate
active
07577464
ABSTRACT:
A compact, non-phased-array, electronically reconfigurable antenna (ERA) system with at least two operational modes has a first operational objective that is polarization-sensitive null steering (PSNS) and a second operational objective that is direction-finding (DF). The system can rapidly switch between two operational states. In the first state, the system behaves like a polarization filter (PF) and operates as a controlled reception pattern antenna (CRPA), while in the second state the system behaves as an angle-of-arrival (AOA) sensor and operates as a fixed reception pattern antenna (FRPA). The system may include a spiral-mode antenna with both feed and load ports; a mode-forming network; an electronics package; and feedback control electronics. Radio frequency (RF) interference rejection and RF direction-finding may be performed as well as reduction and/or elimination of multiple jamming signals that are intentionally or unintentionally directed at a Global Positioning System (GPS). The determination of direction and location of the source of jamming signals may also be achieved.
REFERENCES:
patent: 4366483 (1982-12-01), Hagedon et al.
patent: 4591862 (1986-05-01), Parkhurst et al.
patent: 5313216 (1994-05-01), Wang et al.
patent: 5334984 (1994-08-01), Akaba
patent: 5461387 (1995-10-01), Weaver
patent: 5786791 (1998-07-01), Bruckert
patent: 6011514 (2000-01-01), Frankovich et al.
patent: 6252553 (2001-06-01), Solomon
patent: 6339396 (2002-01-01), Mayersak
patent: 6598009 (2003-07-01), Yang
patent: 6700536 (2004-03-01), Wiegand
patent: 6876337 (2005-04-01), Larry
patent: 2005/0195103 (2005-09-01), Davis et al.
Blackman, S. and Papoli, R.,Design and Analysis of Modern Tracking Systems, Artech House, Boston, MA, 1999.
Corzine, R. G. and Mosko, J. A.,Four-arm Spiral Antennas, Artech House, 1990.
Ezal, K. and Agate, C., “Tracking and interception of ground-based RF sources using autonomous guided munitions with passive bearings-only sensors and tracking algorithms,”Proceedings of the SPIE, Apr. 2004.
Ghose, R. N.,Interference Mitigation: Theory and Application, IEEE Press, 1996.
Grossman, W., “Bearings-Only Tracking: A Hybrid Coordinate System Approach,”Journal of Guidance, Control, and Dynamics, vol. 17, No. 3, 199.
Kennedy, H. D. and Wharton, W., “Direction-Finding Antennas and Systems,”Antenna Engineering Handbook, Second Edition, Johnson, R. C., and Jasik, H., editors, Chapter 39, 1984.
Lipsky, S. E.,Microwave Passive Direction-finding, John Wiley & Sons, 1987.
Penno, R. P. and Pasala, K. M., “Theory of Angle Estimation Using Multiarm Spiral Antennas,”IEEE Transactions on Aerospace and Electronics Systems, vol. 37, No. 1, Jan. 2001.
Bullock, L.G., et al., “An Analysis of Wide-Band Microwave Monopulse Direction-Finding Techniques,” IEEE Transactions on Aerospace and Electronic Systems, vol. 7, No. 1, pp. 188-203, Jan. 1971.
Sundberg, V.C. and Yaw, D.F., “ECM and ESM Antennas,”, Antenna Engineering Handbook, Second Edition, Johnson, R.C., and Jasik, H., editors, Chapter 40, 1984.
Mosko, J.A., “An Introduction to Wideband Two-Channel Direction-Finding Systems, Parts I and II,” Microwave Journal, Feb. & Mar. 1984.
Nakano, H., et al., “A Spiral Antenna Backed by a Conducting Plane Reflector,” IEEE Transactions on Antennas and Propagation, vol. 34, No. 6, Jun. 1986.
Grossman, W., “Bearings-Only Tracking: A Hybrid Coordinate System Approach,”Journal of Guidance, Control, and Dynamics, vol. 17, No. 3, 1991.
Agate Craig S.
Ezal Kenan O.
Larry Thomas L.
Richen Andrew S.
VanBlaricum Michael L.
Anderson Matthew D
Guzman April S
Nixon & Vanderhye PC
Toyon Research Corporation
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