Tag antenna

Details Tag antenna Tag antenna

2005-12-22

2010-02-09

Dinh, Trinh V (Department: 2821)

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

C343S793000

Reexamination Certificate

active

07659863

ABSTRACT:
A dipole part of a length shorter than half of an antenna resonance wavelength is placed so as to be rolled and enables a feeding part11to feed a chip. An inductance part12for adjusting the inductance of the antenna is provided so as to sandwich the feeding part11. The inductance12is provided using an empty space of the inside of the rolled dipole part. By providing the inductance part12, the inductance of the antenna can be adjusted so as to resonate at a predetermined frequency with the capacitance of the chip connected to the feeding part11. At this time, although the radiation resistance of the antenna becomes extremely large according to calculations, it is actually almost the same as the resistance of the chip due to loss, and the power received by the antenna can be provided to the chip.

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