Passive wireless sensors
First Claim
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1. A passive wireless sensor, comprising:
- a plurality of dielectric layers;
an antenna disposed in at least a portion of a cavity formed by one or more dielectric layers of the plurality of dielectric layers;
a diaphragm disposed on the cavity such that the diaphragm is physically separated from the antenna; and
a feeding element disposed in at least a portion of one of the plurality of dielectric layers between the antenna and a reference layer, thereby forming a capacitive coupling between the antenna and the reference layer,wherein the diaphragm, the antenna and the reference layer form an electronic circuit such that antenna senses a change in an operating condition of the sensor and transmits a response signal representative of the change in the operating condition of the sensor.
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Abstract
A passive wireless sensor having a plurality of dielectric layers, an antenna, a diaphragm, and a feeding element is provided. Further, the antenna is disposed in at least a portion of a cavity formed by one or more dielectric layers of the plurality of dielectric layers. Moreover, the diaphragm is disposed on the cavity. Additionally, the feeding element is disposed in at least a portion of the plurality of dielectric layers. Also, the feeding element is operatively coupled to the antenna.
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Citations
19 Claims
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1. A passive wireless sensor, comprising:
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a plurality of dielectric layers; an antenna disposed in at least a portion of a cavity formed by one or more dielectric layers of the plurality of dielectric layers; a diaphragm disposed on the cavity such that the diaphragm is physically separated from the antenna; and a feeding element disposed in at least a portion of one of the plurality of dielectric layers between the antenna and a reference layer, thereby forming a capacitive coupling between the antenna and the reference layer, wherein the diaphragm, the antenna and the reference layer form an electronic circuit such that antenna senses a change in an operating condition of the sensor and transmits a response signal representative of the change in the operating condition of the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A monitoring system, comprising:
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a device comprising a first surface; and a passive wireless sensor coupled to the first surface of the device, wherein the passive wireless sensor comprises; a plurality of dielectric layers; an antenna disposed in at least a portion of a cavity formed by one or more dielectric layers of the plurality of dielectric layers; a diaphragm disposed on the cavity such that the diaphragm is physically separated from the antenna; a feeding element disposed in at least a portion of one of the plurality of dielectric layers between the antenna and a reference layer, thereby forming a capacitive coupling between the antenna and the reference layer, wherein the diaphragm, the antenna and the reference layer form an electronic circuit such that antenna senses a change in an operating condition of the sensor and transmits a response signal representative of the change in the operating condition of the sensor; a receiver operatively coupled to the passive wireless sensor and configured to receive at least a portion of response signals representative of the sensor response from the passive wireless sensor; a signal processor operatively coupled to the receiver and configured to process the response signals; and a monitoring device operatively coupled to the signal processor and configured to monitor the passive wireless sensor based on the processed response signals. - View Dependent Claims (17)
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18. A sensor network, comprising:
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a transmitter configured to transmit interrogation signals; a plurality of sensing nodes, wherein one or more sensing nodes of the plurality of sensing nodes comprise at least one passive wireless sensor, wherein the at least one passive wireless sensor is configured to receive the interrogation signals and transmit response signals in response to the interrogation signals, and wherein the at least one passive wireless sensor comprises; a plurality of dielectric layers; an antenna disposed in at least a portion of a cavity formed by one or more dielectric layers of the plurality of dielectric layers; a diaphragm disposed on the cavity such that the diaphragm is physically separated from the antenna; a feeding element disposed in at least a portion of one of the plurality of dielectric layers between the antenna and a reference layer, thereby forming a capacitive coupling between the antenna and the reference layer, wherein the diaphragm, the antenna and the reference layer form an electronic circuit such that antenna senses a change in an operating condition of the sensor and transmits a response signal representative of the change in operating condition of the sensor; a receiver operatively coupled to the passive wireless sensor and configured to receive the response signal; and a signal processor operatively coupled to the receiver and configured to process the response signal to produce a sensor response. - View Dependent Claims (19)
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Specification