Antenna apparatus and rfid system
AssigneeMurata Manufacturing Co., Ltd.
InventorsShunji Mandai, Yoichi Saito
Life of this patent
Estimating the term…
Abstract
An antenna apparatus having a substrate, an antenna on the substrate, and a power supply circuit element on the substrate and connected to the antenna. The antenna includes coil-shaped first and second coil antenna units respectively having coil axes that intersect with the substrate. The first coil antenna unit and the second coil antenna unit are arranged on the substrate such that a direction in which a current flows through one of the coil antenna units is clockwise and a direction in which the current flows through the other of the coil antenna units is counterclockwise. The power supply circuit element is positioned between the first coil antenna unit and the second coil antenna unit.
Claims20
An antenna apparatus comprising:
- a substrate;
- a power supply circuit element disposed on the substrate;
- and
- an antenna disposed on the substrate and connected to the power supply circuit element, the antenna including a first coil antenna unit and a second coil antenna unit, each antenna unit having a coil axis that intersects with the substrate, the first coil antenna unit and the second coil antenna unit being disposed at respective positions on the substrate such that a direction in which a current flows through one of the coil antenna units is clockwise and a direction in which a current flows through the other of the coil antenna units is counterclockwise,
- wherein the power supply circuit element is disposed at a position on the substrate and within a region between the first coil antenna unit and the second coil antenna unit.
An antenna apparatus comprising:
- a substrate;
- a power supply circuit disposed on the substrate;
- and
- an antenna disposed on the substrate and coupled to the power supply circuit, the antenna including a first coil antenna and a second coil antenna, with each coil antenna being coil-shaped and having a coil axis that intersects the substrate,
- wherein the first coil antenna and the second coil antenna are configured on the substrate such that a current provided by the power supply circuit flows through the first coil antenna in a clockwise direction and flows through the second coil antenna in a counterclockwise direction, and
- wherein the power supply circuit is positioned on the substrate on an imaginary straight line that is located equidistantly from the coil axis of the first coil antenna and the coil axis of the second coil antenna.
An RFID system comprising:
- a product having an RFID tag;
- and
- an antenna apparatus that performs wireless communication with the RFID tag of the product, the antenna apparatus including:
- a substrate;
- a power supply circuit disposed on the substrate;
- and
- an antenna disposed on the substrate and connected to the power supply circuit, the antenna including a first coil antenna unit and a second coil antenna unit, each antenna unit being coil-shaped and having a coil axis that intersects with the substrate, the first coil antenna unit and the second coil antenna unit being disposed at respective positions on the substrate such that a current provided by the power supply circuit flows through the first coil antenna unit in a clockwise direction and flows through the second coil antenna units in a counterclockwise direction, and
- wherein the power supply circuit is disposed at a position on the substrate between the first coil antenna unit and the second coil antenna unit.
Dependencies are inferred from the claim text.