Response device in contact/contactless IC card communication system
AssigneeRohm Co., Ltd.
InventorsYoshihiro Ikefuji, Hiroharu Okada
Life of this patent
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Abstract
An IC card (80) has a communication module (20) embedded in a core member (30). The communication module (20) has a contact terminal (24), an antenna (60) and an IC chip (82) mounted on the same circuit board (22) for making the assembly work easier. The contact terminal (24) is formed at an upper surface of the circuit board (22) to be exposed from an opening (26a) of a surface material (26). The antenna (60) and the IC chip (82) are provided to a lower surface of the circuit board (22) to indirectly face the contact terminal (24). The IC chip (82) automatically adjusts the resonance frequency of the antenna (60) such that an output from the antenna (60) has the maximum value constantly.
Claims25
A responser having a communication module and communicating with an interrogator, said communication module including:
- a circuit board;
- a contact terminal provided at said circuit board for electrical contact with said interrogator, wherein said contact terminal is provided at one surface of said circuit board;
- an antenna provided at an other surface of said circuit board and formed to allow change in resonance frequency due to an influence of said contact terminal to be corrected for receiving electromagnetic waves from said interrogator;
- and
- a processing circuit provided at the other side of said circuit board and connected to said contact terminal and said antenna to process a signal supplied from said interrogator via said contact terminal or said antenna and a signal to be supplied to said interrogator via said contact terminal or said antenna.
A communication module used for a responser communicating with an interrogator, comprising:
- a circuit board;
- a contact terminal provided at one surface of said circuit board for electrically contacting with said interrogator;
- an antenna directly provided at an other surface of said circuit board and formed to allow change in resonance frequency due to an influence of said contact terminal to be corrected for receiving electromagnetic waves from said interrogator;
- and
- a processing circuit provided at said circuit board and connected to said contact terminal and said antenna to process a signal supplied from said interrogator via said contact terminal or said antenna and a signal to be supplied to said interrogator via said contact terminal or said antenna.
An IC card comprising:
- a container having an opening;
- and
- a communication module embedded in said container, said communication models including:
- a circuit board;
- a contact terminal formed on one surface of said circuit board and exposed from the opening of said container;
- an antenna formed on an other surface of said circuit board to allow change, in resonance frequency due to an influence of said contact terminal to be corrected;
- and
- an IC chip mounted on said circuit board and connected to said contact terminal and said antenna.
Dependencies are inferred from the claim text.