PASSIVE DETECTION OF ANALYTES
First Claim
1. An apparatus for facilitating detection of an analyte, the apparatus comprising:
- a substrate; and
an antenna circuit disposed on the substrate, the antenna circuit including an antenna and a sensing element,the sensing element having an electrical resistance that is modified by an interaction between the analyte and the sensing element,the antenna generating transmitted radiation when irradiated with incident radiation,the transmitted radiation having a transmitted spectral distribution, the transmitted spectral distribution being correlated with the electrical resistance of the sensing element so as to facilitate detection of the analyte.
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Accused Products
Abstract
An example apparatus for facilitating detection of an analyte comprises a substrate supporting an antenna circuit that includes an antenna and a sensing element. The sensing element has a property, such as electrical resistance, that is modified by an interaction between the analyte and the sensing element. The antenna circuit generates transmitted radiation when irradiated with incident radiation, acting as a transponder, and the transmitted radiation has a spectral distribution correlated with a property of the sensing element so as to facilitate detection of the analyte. In some examples, the antenna circuit may be supported by a personal data card, such as a passenger ticket for a public transport system.
60 Citations
22 Claims
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1. An apparatus for facilitating detection of an analyte, the apparatus comprising:
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a substrate; and an antenna circuit disposed on the substrate, the antenna circuit including an antenna and a sensing element, the sensing element having an electrical resistance that is modified by an interaction between the analyte and the sensing element, the antenna generating transmitted radiation when irradiated with incident radiation, the transmitted radiation having a transmitted spectral distribution, the transmitted spectral distribution being correlated with the electrical resistance of the sensing element so as to facilitate detection of the analyte. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for facilitating detection of an analyte, the apparatus comprising:
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a sensor apparatus, the sensor apparatus comprising; a substrate; and an antenna circuit disposed on the substrate, the antenna circuit including an antenna and a sensing element, the sensing element having an electrical resistance that is modified by an interaction between the analyte and the sensing element; and a remote apparatus, the remote apparatus operable to produce incident radiation and to detect transmitted radiation from the sensor apparatus when the incident radiation is incident on the sensor apparatus, the antenna generating transmitted radiation when irradiated with incident radiation, the transmitted radiation having a transmitted spectral distribution, the transmitted spectral distribution being correlated with the electrical resistance of the sensing element so as to facilitate detection of the analyte, the remote apparatus being operable to analyze the spectral distribution of the transmitted radiation so as to determine a presence of the analyte at the sensor apparatus, the sensing apparatus having no dedicated power supply. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A method of detecting an analyte in a public area, the method comprising:
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providing a person entering the public area with a personal data card, the personal data card comprising an antenna circuit including an analyte sensitive element; irradiating the ticket with electromagnetic radiation, the electromagnetic radiation being incident radiation falling on the antenna circuit; detecting transmitted radiation transmitted by the antenna circuit when irradiated by the incident radiation; detecting the analyte using spectral properties of the transmitted radiation.
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Specification