Antenna using inductively coupled feeding method, RFID tag using the same and antenna impedence matching method thereof
First Claim
1. An antenna, comprising:
- a resonator for determining a resonance frequency of the antenna; and
a feeder for providing a radio frequency (RF) signal to an element connected to the antenna.
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Accused Products
Abstract
Provided are an antenna using an inductively coupled feeding method, a Radio Frequency Identification (RFID) tag thereof, and an antenna impedance matching method thereof. The antenna includes a resonator for determining a resonance frequency of the antenna and a feeder for providing an RF signal to an element connected to the antenna. An RFID tag includes an antenna which receives an RF signal from the RFID reader, an RF front-end which rectifies and detects the RF signal, and a signal processor which is connected to the RF front-end. Particularly, the antenna includes a resonator for determining a resonance frequency of an antenna and a feeder for providing the RF signal to the RF front-end, wherein mutual inductive coupling between the resonator and the feeder is performed.
203 Citations
51 Claims
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1. An antenna, comprising:
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a resonator for determining a resonance frequency of the antenna; and
a feeder for providing a radio frequency (RF) signal to an element connected to the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A Radio Frequency Identification (RFID) tag, comprising:
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an antenna which receives an RF signal from an RFID reader;
an RF front-end which rectifies and detects the RF signal; and
a signal processor which is connected to the RF front-end, wherein the antenna includes;
a resonator for determining a resonance frequency of an antenna; and
a feeder for providing the received RF signal to the RF front-end, and the resonator and the feeder are inductively coupled to each other. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. An impedance matching method of an antenna, the antenna comprising:
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a resonator for determining a resonance frequency; and
a feeder for providing an RF signal in a loop structure, wherein a characteristic that the imaginary number part of impedance in the antenna is varied according to the linewidth of the loop being used. - View Dependent Claims (49, 50, 51)
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Specification