Intrusion detection systems employing active detectors

Details Intrusion detection systems employing active detectors Intrusion detection systems employing active detectors

1998-04-22

2000-03-14

Wong, Don

Communications: radio wave antennas

Antennas

Microstrip

342 28, 340522, H01Q 302, G08B 1900, G01S 1300

Patent

active

060379022

ABSTRACT:
This invention discloses a microwave transceiver suitable for use in an intrusion detection system including a microwave radiation generator, a printed antenna on a first side of a printed circuit board for radiating the microwave radiation generated by the microwave generator, and a ground plane on a second side of the printed circuit board and having an outer edge which is generally coextensive with an outer edge of the printed antenna.

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patent: 5680144 (1997-10-01), Sanad
"Astra"--a Tradename by U.K. Companies Guardall Ltd.
"Mirage"--a Tradename by Texecom Ltd. (1996).

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