Surface wave phase correlator and monopulse radar system employing the same
Patent 4217563 Issued on August 12, 1980. Estimated Expiration Date: 
August 12, 1997. 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.
August 12, 1997. 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 References 3660647 3701147 3723916 3770949 3896442 3917401 Programmable phase coded surface wave device Patent #: 3961290 InventorAssigneeApplicationNo. 05/642802 filed on 12/22/1975US Classes:333/150, Delay lines including elastic surface wave propagation means29/25.35, PIEZOELECTRIC DEVICE MAKING29/594, Acoustic transducer333/193Using surface acoustic wavesExaminersPrimary: Nussbaum, Marvin L.Attorney, Agent or FirmInternational ClassesG01S 13/44 (20060101)G06G 7/00 (20060101) G01S 13/00 (20060101) G06G 7/195 (20060101) AbstractA surface wave phase correlator comprises a pair of substantially identical launch and receiving filter electrode patterns disposed on a common piezoelectric substrate. The correlator is employed with receiving and processing circuitry in a monopulse radar system to provide relative phase information for target calculations by a digital processor. Fast rise and fall times for the correlator output signals enable rapid digital processing of incoming target signals.Other References
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