Communications: directive radio wave systems and devices (e.g. – Determining distance – With frequency modulation
Reexamination Certificate
2011-07-19
2011-07-19
Gregory, Bernarr E (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
With frequency modulation
C342S118000, C342S159000, C342S160000, C342S175000, C342S192000, C342S194000, C342S195000, C342S196000
Reexamination Certificate
active
07982661
ABSTRACT:
A frequency modulated continuous wave (FMCW) radar is described. The radar includes a first discriminator for receiving a portion of the swept frequency signal generated by a frequency sweep generator and for producing a reference difference-frequency signal of frequency equal to the difference between the frequency of the swept frequency signal and the frequency of a time displaced swept frequency signal derived from the swept frequency signal. An analogue-to-digital converter is provided for sampling the target difference-frequency signal at a rate derived from the frequency of the reference difference-frequency signal. A processor (88) for determining frequency components of the digitized target difference-frequency signal is arranged to determine for at least one frequency component of the digitized target difference-frequency signal any phase difference between frequency sweeps of said swept frequency signal. The radar may be used for detecting foreign object debris (FOD) on runway surfaces and the like. A corresponding method of operating an FMCW radar is also described.
REFERENCES:
patent: 4123719 (1978-10-01), Hopwood et al.
patent: 4201986 (1980-05-01), Ducrocq
patent: 4388622 (1983-06-01), Fletcher, Jr.
patent: 4539565 (1985-09-01), Norsworthy
patent: 4593287 (1986-06-01), Nitardy
patent: 4692766 (1987-09-01), Rolfs et al.
patent: 4754277 (1988-06-01), Voyce
patent: 5172123 (1992-12-01), Johnson
patent: 5189427 (1993-02-01), Stove et al.
patent: 5361072 (1994-11-01), Barrick et al.
patent: 5379001 (1995-01-01), Hedtke
patent: 5517197 (1996-05-01), Algeo et al.
patent: 5642081 (1997-06-01), Bosch et al.
patent: 5694132 (1997-12-01), Johnson
patent: 5726657 (1998-03-01), Pergande et al.
patent: 5910785 (1999-06-01), Normant
patent: 5963163 (1999-10-01), Kemkemian
patent: 6072419 (2000-06-01), Normant
patent: 6317074 (2001-11-01), Johnson
patent: 6664920 (2003-12-01), Mott et al.
patent: 2 309 109 (2001-11-01), None
patent: 44 27 352 (1996-01-01), None
patent: 0 615 137 (1994-03-01), None
patent: 0 730 166 (1995-03-01), None
patent: 1 195 888 (2001-06-01), None
patent: 1 589 047 (1978-05-01), None
patent: 2 083 966 (1981-09-01), None
Bui L Q et al.: “94 GHz FMCW radar for low visibility aircraft landing system,” Microwave Symposium Digest, 1991., IEEE MTT-S International Boston, MA, USA Jun. 10-14, 1991, New York, pp. 1147-1150.
Beasley P D L et al.: “Tarsier/spl R/, a millimeter wave radar for airport runway debris detection,” Radar Conference, 2004, Eurad. First European Amsterdam, The Netherlands, Oct. 2004, pp. 261-264.
Nalezinski M et al.: “Novel 24 GHz FMCW front-end with 2.45 GHz SAW reference path for high-precision distance measurements,” Microwave Symposium Digest, 1997., IEEE MTT-S International Denver, Co., USA Jun. 10-14, 1997, vol. 1, pp. 185-188.
PCT International Search Report mailed May 26, 2006.
European Search Report dated Jul. 18, 2005.
Written Opinion of the International Searching Authority dated May 26, 2006.
Gregory Bernarr E
Nixon & Vanderhye P.C.
QinetiQ Limited
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