Transponder and antenna
First Claim
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1. An antenna for a transponder comprising a three-dimensional magnetic core composed of a single stack of rectangular metallic thin plates, and a coil having windings wound on said magnetic core such that said windings are arranged parallel to a greatest rectangular dimension of said plates forming said magnetic core.
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Abstract
An antenna for a transponder comprises a magnetic core composed of layered amorphous metallic thin plates or composite plates of soft magnetic flakes and a synthetic resin, and a coil wound on the magnetic core. A transponder comprises two antennas set forth above, and a spiral antenna.
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Citations
26 Claims
- 1. An antenna for a transponder comprising a three-dimensional magnetic core composed of a single stack of rectangular metallic thin plates, and a coil having windings wound on said magnetic core such that said windings are arranged parallel to a greatest rectangular dimension of said plates forming said magnetic core.
- 11. An antenna for a transponder comprising a three-dimensional rectangular plate magnetic core comprising a single stack of rectangular metallic thin plates, each plate composed of a composite material of soft magnetic flakes and a synthetic resin, and a coil having windings wound on said magnetic core such that said windings are arranged perpendicular to a greatest rectangular dimension of the magnetic core.
Specification