Patent
Antenna for near field communication, near field communication terminal having the same, radio frequency antenna, and ic card having the same
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TLDR
In this paper, an antenna for NFC (Near Field Communication), an NFC terminal having the same, an RF(Radio Frequency) antenna, and an IC(Integrated Chip) card has been provided to improve a receiving range and receiving safety by reducing loss of a signal and power transmitted from an active antenna.Abstract:
An antenna for NFC(Near Field Communication), an NFC terminal having the same, an RF(Radio Frequency) antenna, and an IC(Integrated Chip) card having the same are provided to improve a receiving range and receiving safety by reducing loss of a signal and power transmitted from an active antenna. An antenna for NFC includes a first layer, a second layer, a third layer, a fourth layer, and at least one capacitor(7). An antenna coil which is wound by a plurality of wires is arranged on the same plane with the first layer substantially. The second layer is for ground shielding. The third layer is made of a plastic sheet. A receiving range extension coil which is separated from the antenna coil and forms an independent closed loop is arranged on the fourth layer. The capacitor is electrically connected to the receiving range extension coil. The capacitor forms a closed loop with the receiving range extension coil.read more
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Patent
Non-stationary magnetic field emitter, its connection in system and data modulation method
TL;DR: In this paper, a contactless communication channel (particularly RFID/NFC) in miniature build space is provided, where the emitter has an oblong, at least partially ferrite core, the core is winded up by a wire with at least two threads, the threads are on the core and placed tightly next to each other and the effective width (w) of one thread corresponds to the radius of the core in the circular core cross-section.
Patent
Non-stationary magnetic field emitter
TL;DR: In this article, a contactless communication channel (mainly RFID/NFC) in the miniature build space was designed for creation of the contactless communications channel. But the authors did not specify the number of threads to be wound on the emitter.
References
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Patent
Antenna and data reader
TL;DR: In this paper, the antenna attached to the data reader has a constitution for setting the reactance of a primary coil side reactance circuit on the basis of a value C b of a secondary coil side capacitor, so that the communication distance can be extended.
Patent
Antenna module and portable communication terminal equipped therewith
TL;DR: In this paper, the authors proposed an antenna module which combines long communication functions as a tag and a wide transmission area as a reader writer while saving a space, and a portable communication terminal equipped with the antenna module.
Patent
Reader/writer for non-contact ic card
TL;DR: In this article, a reader/writer for a non-contact IC card, which can efficiently fix an antenna, is proposed, where an electromagnetic wave is transmitted to the IC card from a transmission antenna.