Electronic intruder detection system

Details Electronic intruder detection system Electronic intruder detection system

1977-10-07

1980-02-05

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

333240, 340552, 343 5PD, G01S 906, G08B 1324

Patent

active

041875010

ABSTRACT:
An electronic detection system for detecting intruders employs a transmission line as a sensing element. The transmission line is positioned about the perimeter of the area to be protected. An antenna applies pulsed RF energy to the line. An intruder in the field of the line causes an RF reflection back toward the source, which reflection may be detected by Doppler range-gating techniques.

REFERENCES:
patent: 3031643 (1962-04-01), Sheftelman
patent: 3098988 (1963-07-01), Hafner
patent: 3422431 (1969-01-01), Hofner
patent: 3466651 (1969-09-01), Bigelow
Designing Surface-Wave Transmission Lines, Goubau, Apr. 1954, Electronics, p. 180-184.
Surface Wave Transmission Lines, Goubau, Radio & Television News, vol. 43, Issue 5, May 1950, pp. 10-11.
The G-Line Antenna Lead-In, Lieberman, Radio & Television News, Apr. 1955, pp. 124-125.

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