Sonar target simulator
Patent 4219885 Issued on August 26, 1980. Estimated Expiration Date: 
August 26, 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 26, 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 2887671 3180295 3311868 3642999 3649735 InventorsApplicationNo. 04/395101 filed on 09/08/1964US Classes:367/1, SONAR COUNTER-MEASURES434/6SonarExaminersPrimary: Tubbesing, T. H.Attorney, Agent or FirmInternational ClassG09B 9/56 (20060101)Abstract1. A system for simulating wave reflections from an irregular-shaped moving bject which has been illuminated with energy of frequency F, said system comprising;a receiver (10) for said frequency F;a generator (14) of white noise voltage;means (13) for amplitude modulating frequency F with said white noise voltage to generate random bursts of frequency F;a radiating transducer (11);a bandpass filter (18) having a passband including said frequency F, the output of said filter being coupled to the input of said transducer, and the input of said filter being coupled to the output of said modulator means (13) to radiate said random bursts of frequency F;a second signal path between said modulator and filter including a time delay network (30) for randomly distorting the radiated bursts. | |
