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Title: Circuitry for determining direction of impingement of a received signal
Claims: We claim: 1. In a system for the determination of the direction of impingement of a received energy signal including receiver means composed of a plurality of receivers constituting pairs of mutually perpendicular dipoles for receiving orthogonal components of the impinging signal, means connected to the receivers for measuring the unfiltered received components of signals for producing output signals indicative of the direction of impingement of the received signal, and means connected to the measuring means for displaying the direction of impingement of the received signal, the improvement wherein the measuring means comprises a plurality of amplifier circuits each of which includes an automatic gain control amplifier and is connected to a respective receiver for producing a constant amplitude representation of its received signal. 2. In a system for the determination of the direction of impingement of a received energy signal including receiver means composed of a plurality of receivers constituting pairs of mutually perpendicular dipoles for receiving orthogonal components of the impinging signal, means connected to the receivers for measuring the unfiltered received components of signals for producing output signals indicative of the direction of impingement of the received signal, and display means connected to the measuring means, and including first and second deflection means, for displaying the direction of impingement of the received signal; the improvement wherein said measuring means comprises: a plurality of amplifier circuits each of which is connected to a respective receiver for producing a constant amplitude representation of its received signal; first and second difference forming means, each having input terminals and an output terminal; means for coupling said input terminals of each of said difference forming means to said amplifier circuits of a respective one of said pairs of dipoles; and means for coupling said output terminals of said first and second difference forming means to said first and second deflection means respectively. 3. A system as defined in claim 2, wherein the amplifier circuits include automatic gain control amplifiers. 4. A system as defined in claim 2, wherein the amplifier circuits include symmetrical limiters. 5. A system as defined in claim 2, wherein each of said first and second difference forming means includes means for subtracting the output signals produced by said amplifier circuits. 6. A system as defined in claim 5, wherein said measuring means further comprises: means for producing a constant amplitude omnidirectional signal which includes all of the components of the received energy signal and is independent of the direction of the received signal, and which is shifted in phase by 90.degree. with respect to the received signal; and wherein the output of said means for producing an omnidirectional signal is coupled to a brightness control of said display means. 7. A system as defined in claim 6, wherein said means for producing a constant amplitude omnidirectional signal includes a sum forming means for summing the outputs of said amplifier circuits, and a 90.degree. phase shifter connected to the output of said sum forming means. 8. A system as defined in claim 5, wherein said measuring means further comprises: means for producing a constant amplitude omnidirectional signal which includes all of the components of the received energy signal and is independent of the direction of the received signal, and which is shifted in phase by 90.degree. with respect to the received signal, wherein said means for coupling said output terminal of said difference forming means to said deflection means includes a pair of correlators, each of which has a first and second input and an output, said first input of each of said correlators being coupling to the output of said means for producing the omnidirectional signal, said second input of each of said correlators being connected to the output terminal of a respective one of said difference forming means; and wherein said output of each of said correlators is connected to a respective one of said deflection means. 9. A system as defined in claim 8, wherein said means for producing an omnidirectional signal includes an additional receiver for generating an omnidirectional signal which is independent of the direction of impingement of the received signal, an additional amplifier circuit for producing a constant amplitude representation of the omnidirectional signal and a 90.degree. phase shifter, all connected in series. 10. A system as defined in claim 2, wherein said measuring means further comprises means for producing a constant amplitude omnidirectional signal which includes all of the components of the received energy signal and is independent of the direction of the received signal, and which is shifted in phase by 90.degree. with respect to the received signal; wherein each of said first and second difference forming means comprises means for subtracting the signals supplied to its input terminals; and wherein said means for coupling said input terminals of said difference forming means to said amplifier circuits includes a plurality of correlators, each having a first and second input and an output, said first input of each of said correlators being connected to the output of said means for producing the omnidirectional signal and said second input of each of said correlators being connected to the output of a respective one of said amplifier circuits, and said input terminals of said difference forming means being connected to said outputs of said correlators of a respective pair of dipoles. 11. A system as defined in claim 10, wherein said means for producing an omnidirectional signal includes an additional receiver for generating an omnidirectional signal which is independent of the direction of impingement of the received signal, an additional amplifier circuit for producing a constant amplitude representation of the omnidirectional signal and a 90.degree. phase shifter, all connected in series. 12. A system as defined in claim 2, wherein each of said difference forming means comprises a phase discriminator having its inputs connected to the outputs of said amplifier circuits of a respective pair of dipoles and having an output connected to a respective one of said deflection means. 13. A system as defined in claim 2, wherein there are three receivers which are located at the vertices of a right triangle, one of said receivers being an omnidirectional receiver for generating a signal which is independent of the direction of impingement of the received energy signal and being located at the vertex of a right angle of said right triangle, and said omnidirectional receiver forming a pair of dipoles with each of said other receivers. 14. A system as defined in claim 13, wherein each of said difference forming means includes a phase discriminator having its inputs connected to the output of said amplifier of said omnidirectional receiver and one of the outputs of said amplifiers of said other two receivers and having an output connected to a respective one of said deflection means. Other info: Inventors: Leisterer, Reinhard (Bremen, DT) Mahlstedt, Walter (Moordeich, DT) Rubel, Manfred (Bremen, DT) Application Number: 310074 Filing Date: 1972-11-28 Publication_date: 1976-01-27 Assignee: Fried. Krupp Gesellschaft mit beschrankter Haftung (Essen, DT) Primary Class(es): 342/384 342/424, 367/125, 367/126 Other Classes: US Patent Ref:
Other Refs:
Primary Examiner: Farley, Richard A. Assistant Examiner: Buczinski, S. C. Attorney: Spencer & Kaye |
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