Traffic-surveillance system

Details Traffic-surveillance system Traffic-surveillance system

1973-07-02

1976-06-15

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

340258B, 343767, G01S 900

Patent

active

039640639

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.

REFERENCES:
patent: 2648839 (1953-08-01), Ford et al.
patent: 2649538 (1953-08-01), Marlow et al.
patent: 3031643 (1962-04-01), Sheftelman
patent: 3286260 (1966-11-01), Howard
patent: 3679993 (1972-10-01), Jones et al.
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.

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