Anti-mask motion sensor
First Claim
1. A method for detecting motion in a security system, comprising:
- positioning a microwave sensor within a housing which includes a security system, and the microwave sensor includes an antenna having a microwave radiating element;
transmitting and receiving a microwave signal for detecting motion using the antenna;
downwardly shaping the microwave signal;
initiating an alarm signal when the microwave sensor detects motion; and
initiating a mask condition signal when the microwave sensor detects motion when the security system is unarmed.
4 Assignments
0 Petitions
Accused Products
Abstract
A motion sensing method and apparatus includes a housing enclosing a microwave motion sensor including an antenna, and a security system. The antenna may be a patch antenna which includes microwave radiating elements for transmitting and receiving a microwave signal for sensing motion. A reflector is attached to the housing and positioned above the antenna for downward shaping of the microwave signal. The microwave radiating elements together with the reflector provide a radiation pattern where a main beam is transmitted in a direction orthogonal to a surface of the antenna and a sided lobe is transmitted downward in amplitude below the microwave motion sensor. An alarm circuit indicates when the microwave sensor detects motion in armed mode, and a masking circuit indicates when the microwave sensor detects motion in a mask zone when the security system is unarmed. A second sensor may be positioned beneath the microwave motion sensor.
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Citations
18 Claims
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1. A method for detecting motion in a security system, comprising:
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positioning a microwave sensor within a housing which includes a security system, and the microwave sensor includes an antenna having a microwave radiating element; transmitting and receiving a microwave signal for detecting motion using the antenna; downwardly shaping the microwave signal; initiating an alarm signal when the microwave sensor detects motion; and initiating a mask condition signal when the microwave sensor detects motion when the security system is unarmed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A motion detecting apparatus in a security system, comprising:
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a housing including a security system; a microwave sensor including an antenna positioned within the housing, and the antenna including at least one microwave radiating element for transmitting and receiving a microwave signal for detecting motion; a reflector attached to the housing and positioned above the antenna for downward shaping the microwave signal; an alarm circuit for indicating when the microwave sensor detects motion when the security system is in an armed mode; and a masking circuit for indicating when the microwave sensor detects motion within a specified mask zone when the security system is unarmed. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A microwave motion sensor antenna system, comprising:
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an antenna, at least a portion of the antenna including a planar surface, and the antenna including at least one microwave radiating element disposed on the planar surface for transmitting and receiving a microwave signal for detecting motion; and an arcuate reflector positioned above the antenna for downward shaping the microwave signal. - View Dependent Claims (15, 16, 17, 18)
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Specification