Device for monitoring an area

Details Device for monitoring an area Device for monitoring an area

2005-06-21

2005-06-21

Hofsass, Jeffery (Department: 2636)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S436000, C340S933000

Reexamination Certificate

active

06909369

ABSTRACT:
The present invention relates to a monitoring device (1) with a transmitter unit (2) and a receiver unit (3) for monitoring an area. Slotted cables serve as antennas. According to the invention, a first slotted cable is arranged as a transmitting a antenna (4) for transmitting a pulsed high-frequency signal and a second slotted cable is arranged as a receiving antenna (9) for receiving the reflected signal. The slotted cables are arranged in association with each other and essentially parallel to each other, and the transmitter unit (2) is connected to the first slotted cable at one end of the antenna arrangement and the receiver unit (3) is connected to the second slotted cable at the other end of the antenna arrangement.

REFERENCES:
patent: 3947834 (1976-03-01), Gershberg et al.
patent: 4224607 (1980-09-01), Poirier et al.
patent: 4612536 (1986-09-01), Harman
patent: 5157393 (1992-10-01), Fox et al.
patent: 2328083 (1999-02-01), None
patent: 2328083 (1999-02-01), None
patent: 07325149 (1995-12-01), None
patent: 07-325149 (1995-12-01), None
patent: 09-133765 (1997-05-01), None
patent: 10096774 (1998-04-01), None

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