Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Reexamination Certificate
2006-02-28
2006-02-28
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
C342S015000, C455S001000
Reexamination Certificate
active
07006039
ABSTRACT:
A high-directivity transponder system uses a dual system of a retrodirective array transmitting a data signal peak toward an interrogator source, and a self-null-steering array transmitting a null toward the interrogator source and a jamming signal elsewhere, resulting in high S/N reception at the interrogator source and avoidance of interception. Integrating modulators would allow each array to transmit different data while the spectra of the transmitted signals are identical, thus disabling interception. The system enables secure point-to-point communications and can be used for short-distance wireless data transmission systems such as wireless LAN and RFID servers. As another aspect, self-steering signal transmission is employed for randomly oriented satellites using circularly polarized, two-dimensional retrodirective arrays. Quadruple subharmonic mixing is used as an effective means of achieving phase conjugation when a high-frequency LO is not feasible or inapplicable. These features may be used for small-satellite communications, secure tactical communications, search and rescue, enemy location fixing and tracking, UAV command and control, forest fire detection, marine-based tracking, and many other applications requiring secure communications with high signal directivity.
REFERENCES:
patent: 3394374 (1968-07-01), Weiss
patent: 3611381 (1971-10-01), Prelschaf
patent: 3731313 (1973-05-01), Nagai
patent: 4107609 (1978-08-01), Gruenberg
patent: 4246585 (1981-01-01), Mailloux
patent: 4641259 (1987-02-01), Shan
patent: 4849764 (1989-07-01), van Heyningen
patent: 5781845 (1998-07-01), Dybdal
patent: 6480522 (2002-11-01), Hoole
patent: 2003/0086366 (2003-05-01), Branlund
patent: 2003/0123384 (2003-07-01), Agee
patent: 2003/0231700 (2003-12-01), Alamouti
patent: 2004/0095907 (2004-05-01), Agee et al.
B.T. Murakami et al., Self-Steering Antenna Arrays for Distributed Picosatellite Networks, 17thAnnueal AIAA/USU Conference on Small Satellites, p. 1-5, Aug. 2003.
W.A. Shiroma et al., Progress in retrodirective arrays for wireless communications, IEEE Topical Conference on Wireless Communication Technology, p. 80-81, Oct. 2003.
S.S. Sung et al., Retrodirective antenna technology for CubeSat networks, IEEE Topical Conference on Wireless Communication Technology, p. 220-221, Oct. 2003.
R.Y. Miyamoto et al., A high-directivity transponder using self-steering arrays, IEEE MTT-S International Microwave Symposium Digest, vol. 3, p. 1683-1686, Jun. 2004.
B.T. Murakami et al., A quadruple subharmonic phase-conjugating array for secure picosatellite crosslinks, IEEE MTT-S International Microwave Symposium Digest, vol. 3, p. 1687-1690, Jun. 2004.
“Retrodirective Arrays for Wireless Communications”, by R. Miyamoto, T. Itoh, IEEE Microwave Magazine, pp. 71-79, Mar. 2002.
“Retrodirective Array Using the Heterodyne Technique”, by C. Pon, IEEE Transactions on Antennas and Propagation, pp. 176-180, Mar. 1964.
“Fully MMIC 76 GHz Radar for ACC”, by H. Kuroda et al, Conference Proc. 2000 IEEE Intelligent Transportation Systems, pp. 299-304, Oct. 2000.
“Multiple Emitter Location and Signal Parameter Estimation”, by R. Schmidt, IEEE Transactions on Antennas and Propagation, vol. AP-34, No. 3, Mar. 1986, pp. 276-280.
Miyamoto Ryan Y.
Murakami Blaine T.
Ohta Aaron
Shiroma Grant S.
Shiroma Wayne A.
Chong Leighton K.
Mull Fred H.
Tarcza Thomas H.
University of Hawai'i
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