Physical deterrent barrier with upward looking detection sensor

Details Physical deterrent barrier with upward looking detection sensor Physical deterrent barrier with upward looking detection sensor

1980-02-29

1982-04-27

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

340564, 340565, 333237, 343771, 343 5PD, G08B 1318, H01P 310

Patent

active

043273580

ABSTRACT:
A physical deterrent barrier is utilized as an integral part of an intruder detection sensor that provides surveillance of intrusions in the air space over the barrier. The sensor is a corner reflecting antenna that is coextensive with and mounts on the top of the barrier and is integrated into a barbed wire topped chain link fence by arranging appropriately spaced parallel strands of barbed wire into a V configuration so as to effect an electrical corner reflector at the system operating frequency.

REFERENCES:
patent: 3560970 (1971-02-01), Kamimura et al.
"Perimeter protection with microwaves", A. D. Woods, JST Charters, Microwave System News, vol. 6, No. 4, pp 113-114, 117-118 Sep. 1976.
"Reflector Type Antennas", J. D. Kram, McGraw Hill, 1950 pp 326-336.

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