Sensor tag and manufacturing method for sensor tag
First Claim
Patent Images
1. A sensor tag comprising:
- a resonator that generates a resonance signal corresponding to a sensed physical quantity;
an antenna that radiates the resonance signal;
a connection conductor that connects the antenna and the resonator,wherein the sensor tag is formed based on at least an equivalent inductance or an equivalent capacitance of the resonator; and
a storage unit that stores equivalent circuit constant information including at least the equivalent inductance or the equivalent capacitance.
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Abstract
A sensor tag (10) includes an antenna (102) and connection conductors (103) formed on a surface of a flexible substrate (101). A sensing element (110) is mounted on land conductors (131) of the connection conductors (103). The sensing element (110) is composed of a crystal vibrator (111) and an RFIC (112). The crystal vibrator (111) receives an excitation signal from the outside and generates a resonance signal of a resonant frequency corresponding to the sensed temperature. Equivalent circuit constant information including at least an equivalent inductance (Lxs) or an equivalent capacitance (Cxs) of the crystal vibrator (111) are stored in the RFIC (112).
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Citations
17 Claims
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1. A sensor tag comprising:
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a resonator that generates a resonance signal corresponding to a sensed physical quantity; an antenna that radiates the resonance signal; a connection conductor that connects the antenna and the resonator, wherein the sensor tag is formed based on at least an equivalent inductance or an equivalent capacitance of the resonator; and a storage unit that stores equivalent circuit constant information including at least the equivalent inductance or the equivalent capacitance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A manufacturing method for a sensor tag including a resonator that generates a resonance signal corresponding to a sensed physical quantity, an antenna that radiates the resonance signal and a connection conductor that connects the antenna and the resonator, the manufacturing method comprising:
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a step of preparing a plurality of types of antennas having different inductances; a step of measuring at least an equivalent inductance or an equivalent capacitance of the resonator; a step of storing, in a storage unit, equivalent circuit constant information including at least the equivalent inductance or the equivalent capacitance; and a step of selecting the antenna on the basis of at least the equivalent inductance or the equivalent capacitance.
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17. A manufacturing method for a sensor tag including a resonator that generates a resonance signal corresponding to a sensed physical quantity, an antenna that radiates the resonance signal and a connection conductor that connects the antenna and the resonator, the manufacturing method comprising:
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a step of measuring at least an equivalent inductance or an equivalent capacitance of the resonator; a step of storing, in a storage unit, equivalent circuit constant information including at least the equivalent inductance or the equivalent capacitance; and a step of changing a shape of the antenna on the basis of at least the equivalent inductance or the equivalent capacitance.
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Specification