Pulsed coherent doppler radar with frequency agility
Patent 4338604 Issued on July 6, 1982. Estimated Expiration Date: 
July 29, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 29, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesRandom frequency radar systems Frequency control for frequency agile pulse radar High speed phase lock control for frequency switching Dual frequency transmission apparatus for frequency-agile radar systems utilizing MTI techniques Patent #: 4155088 InventorAssigneeApplicationNo. 06/173422 filed on 07/29/1980US Classes:342/201, Combined with pulse modulation342/137, With variable pulse repetition frequency (PRF) or pulse width342/16ECCM (Electronic counter-countermeasures, i.e., antijamming)ExaminersPrimary: Tubbesing, T. H.Attorney, Agent or FirmInternational ClassesG01S 13/00 (20060101)G01S 13/24 (20060101) G01S 13/22 (20060101) G01S 7/288 (20060101) G01S 7/285 (20060101) Foreign Application Priority Data1979-07-31 FRAbstractA pulse coherent Doppler radar allows both transmission frequency agility and pulse repetition frequency agility in association with phase encoding which accomplishes the transmission frequency agility by the use of a transmission oscillator, the nominal frequency which may be modified by a microcomputer, a local oscillator, a reference oscillator, and a phase-locked loop having a phase comparator with the oscillator and a mixer for receiving the signals issued by the oscillator and the signal issued by the local oscillator. | |
