ANTENNA FOR RFID COMPATIBLE WITH THREE FREQUENCIES

摘要

PROBLEM TO BE SOLVED: To resolve the problem that an antenna which can be used for a plurality of frequencies and is small-sized and light-weight and is capable of realizing RFID is necessary in order to share RFID among a plurality of countries in Japan and the West.

SOLUTION: The antenna for RFID comprises a first radiation part having the same length as the wavelength of 1/2 of a frequency f1 and a second radiation part having the same length as the wavelength of 1/4 of a frequency f2, wherein the frequency f1 for RFID is used in a first country in common and the frequency f2 for RFID is used in a second country other than the first country in common. The first radiation part comprises a first linear conductor part, and the second radiation part comprises a first linear conductor part and a second conductor part, and the first linear conductor parts and the second conductor part constitute a third radiation part functioning as a minute loop antenna.

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