Wireless transponder and image forming device
First Claim
Patent Images
1. A wireless transponder comprising:
- a first substrate having a first surface and a second surface and being made of a piezoelectric element;
a first electrode formed on the first surface;
a first member coupled to the first surface;
a first antenna that receives an electromagnet input signal having a frequency lower than 150 kHz is formed on the first member, and is connected to the first electrode;
a first spacer coupled to the second surface; and
a delay medium that is held by the first spacer and the second surface, which is made of a material different from the first substrate and the spacer, and propagates an acoustic wave in a direction approximately perpendicular to the second surface, the acoustic wave being generated by the first substrate in response to the electromagnet input signal received by the first antenna, the acoustic wave excluding a surface acoustic wave.
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Abstract
The present invention provides a wireless transponder comprising: a receiver unit that receives an electromagnetic input signal; an input converter unit that converts into an acoustic wave the electromagnetic input signal received by the receiver unit; a delay unit provided in a direction in which an acoustic wave generated by the input converter unit propagates; an output converter unit that converts into an electromagnetic output signal the acoustic wave which has propagated inside the delay unit; and a transmitter unit that transmits wirelessly the electromagnetic output signal generated by the output converter unit.
11 Citations
12 Claims
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1. A wireless transponder comprising:
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a first substrate having a first surface and a second surface and being made of a piezoelectric element; a first electrode formed on the first surface; a first member coupled to the first surface; a first antenna that receives an electromagnet input signal having a frequency lower than 150 kHz is formed on the first member, and is connected to the first electrode; a first spacer coupled to the second surface; and a delay medium that is held by the first spacer and the second surface, which is made of a material different from the first substrate and the spacer, and propagates an acoustic wave in a direction approximately perpendicular to the second surface, the acoustic wave being generated by the first substrate in response to the electromagnet input signal received by the first antenna, the acoustic wave excluding a surface acoustic wave. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electronic apparatus comprising
a housing made of metal; - and
a first wireless transponder installed in the housing, the first wireless transponder including; a first substrate having a first surface and a second surface and being made of a piezoelectric element; a first electrode formed on the first surface; a first member coupled to the first surface; a first antenna that receives an electromagnet input signal having a frequency lower than 150 kHz is formed on the first member, and is connected to the first electrode; a first spacer coupled to the second surface; and a delay medium that is held by the first spacer and the second surface, which is made of a material different from the first substrate and the first spacer, and propagates an acoustic wave in a direction approximately perpendicular to the second surface, the acoustic wave being generated by the first substrate in response to the electromagnet input signal received by the first antenna, the acoustic wave excluding a surface acoustic wave. - View Dependent Claims (10, 11, 12)
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Specification