System for measuring pressure and/or temperature of a tire
First Claim
1. A system for measuring pressure and/or temperature of a tire, comprising:
- a board;
an antenna provided to the board in order to send/receive a micro-wave to/from an external device;
an inter-digital transducer provided to the board and transducing the micro-wave into a surface acoustic wave;
a waveguide part forming at least one looped channel of a polygonal shape on the board, the polygonal shape comprising a corner located at the inter-digital transducer; and
a plurality of reflectors provided to the at least one looped channel at corners different from the corner located at the inter-digital transducer.
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Accused Products
Abstract
In a system for measuring pressure and/or temperature of a tire, reflectivity of reflectors is significantly enhanced and manufacture is significantly easier, since the system is provided with a board, an antenna provided to the board in order to send/receive a micro-wave to/from an external device, an IDT (inter-digital transducer) provided to the board and transducing the micro-wave into SAW (Surface Acoustic Wave), a waveguide part forming at least one looped channel of a polygonal shape on the board, the polygonal shape comprising a comer located at the IDT, and a plurality of reflectors provided to the at least one looped channel at comers different from the comer located at the IDT.
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Citations
10 Claims
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1. A system for measuring pressure and/or temperature of a tire, comprising:
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a board;
an antenna provided to the board in order to send/receive a micro-wave to/from an external device;
an inter-digital transducer provided to the board and transducing the micro-wave into a surface acoustic wave;
a waveguide part forming at least one looped channel of a polygonal shape on the board, the polygonal shape comprising a corner located at the inter-digital transducer; and
a plurality of reflectors provided to the at least one looped channel at corners different from the corner located at the inter-digital transducer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification