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Title: Traffic-surveillance system
Abstract:
A traffic-surveillance system comprises a radar equipment coupled to a transmitter/receiver antenna. This antenna is formed by a transmission line including an elongate hollow conductor with leakage losses, such as a slotted coaxial cable or waveguide, producing along its length an electric radiating field. Any metallic mass, such as a vehicle, located within that field reflects part of the radiated energy which is then picked up by the line. Part of the reflected energy is absorbed in the characteristic impedance of the line while the remainder is conveyed to the radar equipment where it is processed to yield the required information concerning the vehicle.
Other info: Inventors: Narbaits-Jaureguy, Jean-Raymond (Paris, FR) Billottet, Henri (Paris, FR) Application Number: 375444 Filing Date: 1973-07-02 Publication_date: 1976-06-15 Assignee: Thomson-CSF (Paris, FR) Primary Class(es): 342/28 340/933, 343/767 Other Classes: US Patent Ref:
Other Refs: Other References: M. I. Skolnik, Radar Handbook, McGraw-Hill, 1970, pp. 8-1 to 8-13. M. I. Skolnik, Introduction to Radar Systems, McGraw-Hill, 1962, p. 314. | |