Wireless communication device
AssigneeMurata Manufacturing Co., Ltd.
InventorNoriyuki Ueki
Life of this patent
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Abstract
An RFID tag is provided as a wireless communication device for transmitting and receiving a communication signal. The RFID tag includes a base material, antenna patterns formed on the base material, and an RFIC package that is a feeder circuit connected to the antenna patterns. In the antenna patterns, a line width at a harmonic current concentration portion where a current is strong at a frequency of harmonic resonance higher than a resonance frequency at a frequency of the communication signal is narrower than a line width at another portion of the antenna pattern.
Claims20
A wireless communication device for transmitting and receiving a communication signal, the wireless communication device comprising:
- a base material;
- an antenna pattern disposed on the base material;
- and
- a feeder circuit connected to the antenna pattern,
- wherein the antenna pattern comprises a line width at a harmonic current concentration portion where a current is higher than another portion of the antenna pattern at a frequency of harmonic resonance higher than a resonance frequency at a frequency of the communication signal, and
- wherein the line width at the harmonic current concentration portion is narrower than a line width at the other portion of the antenna pattern.
A wireless communication device for transmitting and receiving a communication signal, the wireless communication device comprising:
- a base material;
- a feeder circuit disposed on the base material;
- and
- an antenna pattern disposed on the base material and extending from the feeder circuit towards a side of the base material,
- wherein the antenna pattern comprises a line pattern with at least one wide portion and at least one narrow portion, with the at least one wide portion having a larger line width than the at least one narrow portion, and
- wherein the at least one narrow portion of the antenna pattern is disposed at a position on the base material, such that a current in the at least one narrow portion is higher than a current in the at least one wide portion when the antenna pattern resonates at a frequency of harmonic resonance higher than a resonance frequency of the communication signal.
Dependencies are inferred from the claim text.