Intrusion detection systems employing active detectors
AssigneeVisonic Ltd.
InventorsYizhaq Pinhas, Efim Okun
Life of this patent
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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.
Claims40
A microwave transceiver suitable for use in an intrusion detection system including:
- a microwave radiation generator;
- an elongated printed antenna, having an elongate edge, 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 said printed circuit board which is substantially wider than said elongated printed antenna and has an outer edge which is generally coextensive with said elongate edge of the printed antenna and at least one outer edge which is not generally coextensive with an edge of said printed antenna.
A microwave transceiver suitable for use in an intrusion detection system including:
- a microwave radiation generator;
- a printed antenna for radiating the microwave radiation generated by the microwave generator, the printed antenna having an elongate portion extending along an antenna axis and a stub portion extending outwardly from the elongate portion, perpendicular to the antenna axis, in the plane of the elongate portion and wherein said printed antenna has a length of 1/4 lambda of said microwave radiation in air.
An intrusion detector comprising a microwave transceiver including:
- a microwave radiation generator;
- an elongated printed antenna, having an elongate edge, 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 said printed circuit board which is substantially wider than said elongated printed antenna and has an outer edge which is generally coextensive with said elongate edge of the printed antenna and at least one outer edge which is not generally coextensive with an edge of said printed antenna.
An intrusion detector comprising a microwave transceiver 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, the printed antenna having an elongate portion extending along an antenna axis and a stub portion extending outwardly from the elongate portion, perpendicular to the antenna axis, in the plane of the elongate portion and wherein said printed antenna has a length of 1/4 lambda of said microwave radiation in air.
Dependencies are inferred from the claim text.