RF SIM CARD, CARD READER, AND COMMUNICATION METHOD
First Claim
1. A radio frequency (RF) device comprising:
- an RF transceiver;
an RF antenna; and
a magnetic signal detector.
4 Assignments
0 Petitions
Accused Products
Abstract
A radio frequency (RF) device includes an RF transceiver, an RF antenna, and a magnetic signal detector. The RF is selected to be in the very high frequency (VHF), ultrahigh frequency (UHF), or super high frequency (SHF) bands such that the shielding effect is reduced and the RF device can be configured as a SIM card disposed inside a cellular phone with an increased RF communication range. The magnetic signal detector is used to sense a magnetic field signal from an RF reader, which includes an RF transceiver, an RF antenna, and a magnetic signal transmitter. The longer communication range afforded by the VHF, UHF, or SHF bands is reduced by the sensing of the magnetic field, thereby providing a communication range control, while the RF device and the RF reader exchange information through the RF channel with improved security as a result of the range control.
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Citations
101 Claims
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1. A radio frequency (RF) device comprising:
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an RF transceiver; an RF antenna; and a magnetic signal detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A communication system, comprising:
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an RF device; and an RF reader, wherein the RF device and the RF reader are configured to have a communication range controlled through a magnetic signal and to exchange information through an RF channel. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
wherein the RF reader comprises; a second transceiver; a second RF antenna; and a magnetic field transmitter; wherein the magnetic field transmitter is configured to generate the magnetic field signal to active the first transceiver module if the RF SIM card and the RF reader are within an effective communication range.
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25. The communication system of claim 24, wherein the second transceiver is configured to function in the super high frequency (SHF), very high frequency (VHF), or ultra high frequency (UHF) range.
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26. The communication system of claim 24, wherein the first transceiver has an adjustable activation threshold for activation by the electrical signal converted from the magnetic field signal, and wherein the activation threshold is adjusted based a predetermined communication range between the RF SIM card and the RF reader.
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27. The communication system of claim 24, wherein a communication range between the RF SIM card and the RF reader is determined based on an activation threshold of the first transceiver.
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28. The communication system of claim 23, wherein the RF device and the RF reader device are further configured for identification through the magnetic signal.
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29. The communication system of claim 28, wherein RF device and the RF reader device are further configured for identification through both the magnetic signal and the RF channel.
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30. The communication system of claim 23,
wherein the RF reader is configured to transmit a low-frequency alternating magnetic field signal including identification information of the RF reader, wherein at least one of the RF reader and the RF device is configured: -
(A) to determine whether the RF device and the RF reader are in a predetermined effective communication range, based on the low-frequency alternating magnetic field signal detected by the RF device, and (B) to authenticate the other of the RF reader or the RF device through at least one of the low-frequency alternating magnetic field signal or an RF channel, and wherein both the RF reader and the RF device are configured to perform a transaction therebetween through the RF channel.
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31. The communication system of claim 30, wherein the RF device is configured to determine whether the RF device and the RF reader are in the predetermined effective communication range by comparing an electrical signal converted from the detected low-frequency alternating magnetic field signal with a threshold.
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32. The communication system of claim 31, wherein said electrical signal comprises one of a voltage signal or a current signal.
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33. The communication system of claim 30, wherein the RF device is further configured to obtain the identification information of the RF reader from the low-frequency alternating magnetic field signal.
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34. The communication system of claim 33, wherein the RF device is further configured to send the obtained identification information of the RF reader and identification information of the RF device to the RF reader through the RF channel.
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35. The communication system of claim 30, wherein said RF reader comprises:
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at least one low-frequency transmission coil; at least one drive circuit; at least one encoding circuit; at least one first main processor; at least one RF transceiver circuit; and at least one RF antenna.
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36. The communication system of claim 35, wherein said low-frequency transmission coil, drive circuit, encoding circuit, first main processor, RF transceiver circuit, and RF antenna are connected in series.
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37. The communication system of claim 35, further comprising a modulation circuit disposed between the drive circuit and the encoding circuit.
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38. The communication system of claim 35, wherein said low-frequency transmission coil is an enameled wire coil or a printed circuit board (PCB) coil.
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39. The communication system of claim 35, wherein said low-frequency transmission coil has more than 10 turns.
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40. The communication system of claim 35, wherein said low-frequency transmission coil has about 50-500 turns.
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41. The communication system of claim 35, wherein said low-frequency transmission coil has a Ferrite core or an iron core.
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42. The communication system of claim 35, wherein said RF device comprises:
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at least one low-frequency magnetic induction circuit; at least one low-frequency amplification circuit; at least one threshold judgment and demodulation circuit; at least one second main processor; at least one RF transceiver circuit; and at least one RF antenna.
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43. The communication system of claim 42, wherein said low-frequency magnetic induction circuit, low-frequency amplification circuit, threshold judgment and demodulation circuit, second main processor, RF transceiver circuit, and RF antenna are connected in series.
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44. The communication system of claim 42, wherein said low-frequency magnetic induction circuit comprises a printed circuit board (PCB) coil, an enameled wire coil, a Hall device, or a giant magnetoresistance (GMR) device.
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45. The communication system of claim 23, wherein said RF device is disposed in a terminal.
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46. The communication system of claim 45, wherein said terminal is a mobile terminal comprising one of a cellular phone, a personal digital assistant (PDA), or a laptop computer.
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47. The communication system of claim 23, wherein said RF device is, or is disposed in, a SIM card, a UIM card, a USIM card, a TF card, or an SD card.
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48. A communication method comprising:
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controlling a communication range between two apparatuses using a magnetic field; and exchanging information between the two apparatuses through a radio frequency (RF) communication. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86)
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87. An RF reader, comprising:
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an RF transceiver; an RF antenna; and a magnetic signal transmitter. - View Dependent Claims (88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101)
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Specification