KR100809051B1 - The method and moudle of radio frquency - Google Patents

The method and moudle of radio frquency Download PDF

Info

Publication number
KR100809051B1
KR100809051B1 KR1020070132179A KR20070132179A KR100809051B1 KR 100809051 B1 KR100809051 B1 KR 100809051B1 KR 1020070132179 A KR1020070132179 A KR 1020070132179A KR 20070132179 A KR20070132179 A KR 20070132179A KR 100809051 B1 KR100809051 B1 KR 100809051B1
Authority
KR
South Korea
Prior art keywords
terminal
antenna
unit
smart card
noise
Prior art date
Application number
KR1020070132179A
Other languages
Korean (ko)
Inventor
이상훈
Original Assignee
(주)애니쿼터스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)애니쿼터스 filed Critical (주)애니쿼터스
Priority to KR1020070132179A priority Critical patent/KR100809051B1/en
Application granted granted Critical
Publication of KR100809051B1 publication Critical patent/KR100809051B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07701—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Near-Field Transmission Systems (AREA)
  • Transceivers (AREA)

Abstract

A module and a method for improving performance of an RF(Radio Frequency) of a mobile communication terminal are provided to perform a stable RF(Radio Frequency) communication with an external device and obtain the compatibility of chips and standard. A module for improving performance of an RF of a mobile communication terminal includes a receiving unit(10), a transmission amplifying unit(20), a gain control unit(30), a filter unit(40), and a matching unit(50). The receiving unit transmits RF communication data, which is received through an RF antenna using an electromagnetic induction method, to a smart card. The transmission amplifying unit amplifies return-data of the smart card for a command received from an RF terminal through the receiving unit, and transmits the amplified return-data through the RF antenna. The gain control unit is connected to a side of the transmission amplifying unit and controls an amplifying rate of the transmission amplifying unit. The filter unit removes a noise except a normal signal generated between the RF antenna and the transmission amplifying unit, or removes a noise generated from a return-data signal of the smart card, which is amplified in the transmission amplifying unit. The matching unit matches an impedance of an input terminal and an output terminal for uniform impedance to be applied to a connection part between the receiving unit and the RF antenna, or a connection part between the transmission amplifying unit and the RF antenna.

Description

이동통신단말기의 ＲＦ 성능향상모듈 및 이를 이용한 ＲＦ 성능향상방법{THE METHOD AND MOUDLE OF RADIO FRQUENCY}RF performance improvement module of mobile communication terminal and RF performance improvement method using same {THE METHOD AND MOUDLE OF RADIO FRQUENCY}

본 발명은 이동통신단말기에 RF 통신을 위한 NFC 칩, 콤비 칩과 RF 안테나 사이에 13.56Mhz RF 증폭을 할 수 있는 RF 성능 향상 회로가 구성되어 이동통신단말기의 RF 성능을 향상시키는 방법에 관한 것이다.The present invention relates to a method for improving RF performance of a mobile communication terminal by configuring an RF performance improvement circuit capable of 13.56Mhz RF amplification between an NFC chip, a combi chip, and an RF antenna for RF communication in a mobile communication terminal.

현재 이동통신단말기에서의 RF 이용방법은 플러그 인 타입형 카드에 RF 기능을 이용하여 RF 서비스를 이용하고 있다.Currently, the method of using RF in a mobile communication terminal uses an RF service by using an RF function in a plug-in type card.

이동통신단말기에 플러그인 타입형 카드가 현재는 한정적이나, 향후 여러 종류의 카드들이 사용될 것으로 예상이 된다.Although plug-in type cards are currently limited in mobile communication terminals, it is expected that various types of cards will be used in the future.

또한, NFC를 통한 대용량 플러그인 타입형 카드로 SWP(Single Wire Protocol) 통신도 시도되고 있다.In addition, SWP (Single Wire Protocol) communication has been attempted with a large-capacity plug-in type card through NFC.

13.56Mhz의 RF 통신은 주변환경에 민감하여 칩 제조사간에 편차, 통신규격별 편차가 심하여 앞으로의 RF 환경이 다변화될 것으로 예상이 된다. 하지만, 이동통 신단말의 RF 기능은 플러그 인 타입으로 이동성이 있다. The 13.56Mhz RF communication is sensitive to the surrounding environment, so it is expected that the RF environment will be diversified in the future due to the deviation between chip makers and communication standards. However, the RF function of the mobile communication terminal is a plug-in type and is portable.

기존에 나와 있는 이동통신단말기에 삽입이 되어 사용이 될 수 있어, 호환성 확보가 시급한 상황이다.Since it can be used by being inserted into the existing mobile communication terminal, it is urgent to secure compatibility.

기존 국내사용 13.56Mhz는 국제규격 ISO 14443 타입 A 또는 미페어(Mifare)를 지원하였으나, ISO 타입 B, 타입 C, ISO 15693 등을 사용할 계획이어서 RF 안테나의 호환성 확보가 시급한 상황이다.The existing domestic 13.56Mhz supported the international standard ISO 14443 Type A or Mifare, but plans to use ISO Type B, Type C, ISO 15693, it is urgent to secure the compatibility of the RF antenna.

한편, RF 서비스 활성화로 기존에는 교통요금을 RF 통신으로 결제하였으나, 다양한 서비스 출시로 인해 다양한 RF 리더기와의 RF 통신 호환성 확보도 시급한 상황이다.On the other hand, the payment of the transportation fee by RF communication has been made by activating RF service, but it is urgent to secure RF communication compatibility with various RF readers due to the launch of various services.

상기의 문제점을 해결하기 위해 본 발명에서는 이동통신단말기 내에 어떠한 13,56Mhz의 RF 칩이 들어와도 외부의 RF 리더와 안정적인 RF 통신을 할 수 있고, 규격별 및 칩간 호환성을 확보할 수 있는 이동통신단말기의 RF 성능향상모듈 및 이를 이용한 RF 성능향상방법을 제공하는데 그 목적이 있다.In order to solve the above problems, the present invention enables stable RF communication with an external RF reader even when any 13,56Mhz RF chip enters the mobile communication terminal, and ensures compatibility between specifications and chips. The purpose of the present invention is to provide a module for improving RF performance and a method for improving RF performance using the same.

상기의 목적을 달성하기 위해 본 발명에 따른 이동통신단말기의 RF 성능향상모듈은,RF performance improvement module of a mobile communication terminal according to the present invention to achieve the above object,

이동통신단말기에 내장된 NFC와 RF 안테나 사이, 또는 RF 칩과 RF 안테나 사이에 설치되는 RF 성능향상 모듈로 이루어지고,RF performance improvement module installed between the NFC and RF antenna, or between the RF chip and the RF antenna built in the mobile communication terminal,

상기 RF 성능향상 모듈은 RF 단말기의 전자기 유도를 통한 비접촉 RF 통신 데이터가 송출되면, RF 안테나를 통해 전자기 유도방식으로 받아들인 RF 통신 데이터를 스마트 카드에 전달하는 수신부(10)와,The RF performance improving module includes a receiving unit 10 for transmitting RF communication data received by electromagnetic induction through the RF antenna to a smart card when non-contact RF communication data is transmitted through electromagnetic induction of the RF terminal;

그 수신부(10)를 통해 RF 단말기로부터 수신된 명령에 대한 스마트 카드의 회신 데이터를 전자기 유도 방식으로 송출시 증폭시킨 후, RF 안테나를 통해 송출시키는 송신증폭부(20)와,A transmission amplification unit 20 for amplifying the reply data of the smart card for the command received from the RF terminal through the reception unit 10 in an electromagnetic induction method and then transmitting the RF data through the RF antenna;

그 송신증폭부(20) 일측에 연결되어 송신증폭부의 증폭율을 제어하는 게인컨트롤부(Gain Control)(30)와,A gain control unit 30 connected to one side of the transmission amplifier 20 to control an amplification factor of the transmission amplifier;

RF 단말기(2)로부터 수신된 신호 중 RF 안테나(60)와 송신증폭부(20) 사이에서 정상 신호외에 발생되는 노이즈(잡음)를 제거하거나, 또는 송신증폭부(20)를 통해 증폭된 스마트 카드의 회신 데이터 신호에서 발생되는 노이즈(잡음)를 제거하는 필터부(40)와,Among the signals received from the RF terminal 2, the noise (noise) generated in addition to the normal signal between the RF antenna 60 and the transmission amplifier 20, or the smart card amplified through the transmission amplifier 20 A filter unit (40) for removing noise (noise) generated in the reply data signal of

수신부(10)와 RF 안테나(60)간의 연결부위 또는, 송신증폭부(20)와 RF 안테나(60)간의 연결부위에 상호 균일한 임피던스가 걸리도록 입력단과 출력단의 임피던스를 보정하여 맞춰주는 매칭부(50)로 구성되어 모듈화됨으로서 달성된다.Matching unit for correcting and matching the impedance of the input terminal and the output terminal so as to apply a uniform impedance to each other between the connection portion between the receiver 10 and the RF antenna 60 or the connection between the transmission amplifier 20 and the RF antenna 60 Achievement is achieved by being comprised of 50 modules.

또한, 본 발명에 따른 이동통신단말기의 RF 성능향상모듈을 이용한 RF 성능향상방법은,In addition, the RF performance improvement method using the RF performance improvement module of the mobile communication terminal according to the present invention,

RF 단말기(버스, 지하철 등의 RF 결재 단말기)에서 전자기 유도를 통한 비접촉 RF 통신 데이터를 송출하면, RF 안테나에서 전자기 유도방식으로 RF 단말기의 RF 통신 데이터를 받아들이고, 그 RF 통신 데이터를 수신부를 통해 스마트 카드에 RF 통신 데이터를 전달하는 단계(S100)와, When the RF terminal (RF payment terminal such as a bus or subway) transmits the non-contact RF communication data through electromagnetic induction, the RF antenna receives the RF communication data of the RF terminal by the electromagnetic induction method and smartly transmits the RF communication data through the receiver. Delivering the RF communication data to the card (S100),

RF 단말기로부터 수신된 명령에 대한 스마트 카드의 회신 데이터를 전자기 유도 방식으로 송출시 출력을 높이도록 송신증폭부를 통해 증폭시켜 출력시키는 단계(S200)와,Amplifying and outputting the reply data of the smart card with respect to the command received from the RF terminal through the transmission amplifier to increase the output when transmitting in an electromagnetic induction method (S200);

게인컨트롤부를 통해 스마트 카드의 회신 데이터 신호의 잡음 지수 레벨 크기에 따라 송신증폭부의 증폭을 조절하는 단계(S300)와,Adjusting amplification of the transmission amplifier according to the noise figure level of the reply data signal of the smart card through the gain controller (S300);

필터부를 통해 송신증폭부에서 증폭된 스마트 카드의 회신 데이터 신호에서 발생되는 노이즈(잡음)를 제거하는 단계(S400)와,Removing noise (noise) generated in the reply data signal of the smart card amplified by the transmission amplifier through the filter unit (S400);

매칭부를 통해 송신증폭부와 RF 안테나간의 연결부위에 상호 균일한 임피던스가 걸리도록 입력단과 출력단의 임피던스를 보정하여 맞춰주어 RF 단말기로 안전하게 RF 송신시키는 단계(S500)로 이루어짐으로서 달성된다.It is achieved by the step of correcting the impedance of the input terminal and the output terminal so as to take a uniform impedance between the connection between the transmission amplifier and the RF antenna through the matching unit to secure RF transmission to the RF terminal (S500).

이상에서 설명드린 바와 같이, 본 발명에서는 이동통신단말기 내에 어떠한 13,56Mhz의 RF 칩이 들어와도 외부의 RF 리더와 안정적인 RF 통신을 할 수 있고, 규격별 및 칩간 호환성을 확보할 수 있는 효과가 있다.As described above, in the present invention, even if any 13,56Mhz RF chip enters the mobile communication terminal, stable RF communication with an external RF reader can be achieved, and compatibility between specifications and chips can be secured.

이하 본 발명의 바람직한 실시예를 첨부 도면을 참조하여 상세히 설명하기로 한다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1 및 도 2는 본 발명에 따른 RF 성능향상모듈의 구성요소를 도시한 블록도에 관한 것으로, 이는 수신부(10), 송신증폭부(20), 게인컨트롤부(30), 필터부(40), 매칭부(50)로 구성된다.1 and 2 is a block diagram showing the components of the RF performance improvement module according to the present invention, which is a receiver 10, a transmission amplifier 20, a gain control unit 30, a filter unit 40 ) And a matching unit 50.

상기 수신부(10)는 RF 단말기(버스, 지하철 등 RF 결재 단말기)의 전자기 유도를 통한 비접촉 RF 통신 데이터가 송출되면, RF 안테나(60)를 통해 전자기 유도방식으로 받아들인 RF 통신 데이터를 스마트 카드에 전달하는 역할을 한다.The receiver 10 transmits the non-contact RF communication data through electromagnetic induction of an RF terminal (bus, subway, etc.), the RF communication data received by the electromagnetic induction method through the RF antenna 60 to the smart card. It serves to convey.

이는 RF 안테나(60)를 통해 RF 단말기(2)의 RF 통신 데이터를 수신받고, 이를 도 3에서 도시한 바와 같이, 다이오드 D1와 캐패시터 C1를 통해 평활하여 스마트 카드(LA)로 전달하도록 구성된다.It is configured to receive the RF communication data of the RF terminal 2 through the RF antenna 60, and smooth it through the diode D1 and the capacitor C1 and transmit it to the smart card L A as shown in FIG. .

또는 도 4에서 도시한 바와 같이, RF 안테나(60)를 통해 RF 단말기(2)의 RF 통신 데이터를 수신받고, 저항 R3로 센싱하여 캐패시터 C5로 평활하여 스마트 카드(LA)로 전달하도록 구성된다.Alternatively, as shown in FIG. 4, the RF communication data of the RF terminal 2 is received through the RF antenna 60, is sensed by the resistor R3, and is smoothed by the capacitor C5 and is configured to be transferred to the smart card L A. .

상기 송신증폭부(20)는 수신부(10)를 통해 RF 단말기(2)로부터 수신된 명령에 대한 스마트 카드의 회신 데이터를 전자기 유도 방식으로 송출시 증폭시킨 후, RF 안테나(60)를 통해 송출시키는 역할을 한다.The transmission amplification unit 20 amplifies the reply data of the smart card for the command received from the RF terminal 2 through the receiving unit 10 in an electromagnetic induction method, and then transmits the RF data through the RF antenna 60. Play a role.

이는 도 1에서 도시한 바와 같이, 스마트 카드의 회신 데이터 신호를 OP앰프의 (+)입력단자에 입력시키고, 저항 R3와 저항 R4를 통해 분압된 전압을 OP앰프의 (-)입력단자에 입력하여 게인컨트롤부의 지수만큼 증폭하여 출력하고, 그 출력신호를 캐패시터 C1에 충전하여 필터부인 인덕터 L1에 연결되도록 구성된다.As shown in FIG. 1, the return data signal of the smart card is input to the (+) input terminal of the OP amplifier, and the voltage divided by the resistor R3 and the resistor R4 is input to the (-) input terminal of the OP amplifier. It is configured to amplify and output as much as the index of the gain control unit, and charge the output signal to the capacitor C1 to be connected to the inductor L1 which is the filter unit.

상기 게인컨트롤부(30)는 송신증폭부(20) 일측에 연결되어 송신증폭부(20)의 증폭율을 제어하는 역할을 한다.The gain controller 30 is connected to one side of the transmission amplifier 20 to control the amplification rate of the transmission amplifier 20.

이는 스마트 카드의 회신 데이터 신호에 따라 가변저항 R3와 R4를 통해 전압 분할되어 송신증폭부의 증폭을 제어하도록 구성된다. 즉, 게인 컨트롤부에 공급되 는 스마트 카드의 회신 데이터 신호의 잡음 지수 레벨 크기에 따라, 송신증폭부의 게인을 다르게 설정한다.It is configured to divide the voltage through the variable resistors R3 and R4 according to the return data signal of the smart card to control the amplification of the transmission amplifier. That is, the gain of the transmission amplifier is set differently according to the noise figure level of the return data signal of the smart card supplied to the gain control unit.

그리고, 증폭지수가 높으면 출력에 무리를 주고, 소비전류이 많아지는 문제점이 발생할 수 있고, 증폭지수가 낮으면 입력임피던스가 높아져 주변의 노이즈(잡음) 영향을 많이 받게 되므로, 스마트 카드의 회신 데이터에 일그러짐이 발생되어 의도와는 다른 데이터로 변형이 되어 RF 단말기와 정상적인 통신을 할 수가 없게 된다.In addition, if the amplification index is high, it may cause a problem in the output and increase the current consumption. If the amplification index is low, the input impedance is increased, which is affected by the surrounding noise (noise). This occurs and is transformed into data that is different from the intended data, so that normal communication with the RF terminal is not possible.

본 발명에서는 잡음 지수 레벨 크기에 따라 송신증폭부의 게인을 다르게 설정할 수가 있다.In the present invention, the gain of the transmission amplifier can be set differently according to the noise figure level.

즉, 본 발명에 따른 게인컨트롤부(30)는 도 2에서 도시한 바와 같이, R1, R2로 구성된다. 이를 기술적으로 전압 분배기(Voltage Divider)라 표현하기도 한다.That is, the gain control unit 30 according to the present invention, as shown in Figure 2, is composed of R1, R2. This is also technically referred to as a voltage divider.

본 발명에 따른 게인컨트롤부와 송신증폭부와의 연결은 다음과 같다.Connection between the gain control unit and the transmission amplifier according to the present invention is as follows.

연산증폭기인 OP앰프를 이용하여 V+에 걸리는 전압과, V-에 걸리는 전압의 차를 증폭도(G)배 만큼 증폭하여 출력하는 구조이다.It is a structure that amplifies and outputs the difference between the voltage applied to V + and the voltage applied to V- by an amplification degree (G) times using an operational amplifier, an operational amplifier.

본 발명에서는 보다 정밀한 증폭회로로 사용하기 위해서, 되먹임 구조로 이루어지며, 출력 Vout = Nx의 정밀한 증폭도를 가지는 증폭기로 작동된다.In the present invention, in order to use a more precise amplification circuit, it has a feedback structure and operates as an amplifier having a precise amplification degree of output Vout = Nx.

여기서, Nx는 ÷N의 구조로서, 도 에서 도시한 바와 같이, R1, R2의 저항을 이용한 전압 분배기(Voltage Divider)를 이용하여 구성된다.Here, Nx is a structure of ÷ N, and is configured by using a voltage divider (Voltage Divider) using the resistors R1 and R2, as shown in FIG.

그리고, 증폭도(G)는 수학식 1과 같이 표현할 수가 있다.The amplification degree G can be expressed as in Equation (1).

Figure 112007090494850-pat00001
Figure 112007090494850-pat00001

여기서, Vin은 입력 신호이고, Vout은 출력 신호이며, 증폭율은 저항 R1 및 R2의 비율로 조정될 수 있으며, R2는 가변 저항을 사용하여 증폭도를 조정하게 된다.Here, Vin is an input signal, Vout is an output signal, the amplification factor can be adjusted by the ratio of the resistors R1 and R2, and R2 is used to adjust the amplification degree using a variable resistor.

상기 필터부(40)는 RF 단말기(2)로부터 수신된 신호 중 RF 안테나(60)와 송신증폭부(20) 사이에서 정상 신호외에 노이즈(잡음)를 제거하는 역할을 한다.The filter unit 40 removes noise (noise) in addition to the normal signal between the RF antenna 60 and the transmission amplifier unit 20 among the signals received from the RF terminal 2.

이는 인덕터 L1으로 구성되어 송신증폭부(20)의 출력 신호에 남아있는 노이즈를 제거하고, 원하는 신호만을 통과시켜 매칭부 및 RF 안테나를 통해 RF 단말기로 전달한다.It is composed of an inductor L1 removes noise remaining in the output signal of the transmission amplifier 20, passes only the desired signal and delivers it to the RF terminal through the matching unit and the RF antenna.

상기 매칭부(50)는 송신증폭부(20)와 RF 안테나(60)간의 연결부위에 상호 균일한 임피던스가 걸리도록 입력단과 출력단의 임피던스를 보정하여 맞춰주는 역할을 한다.The matching unit 50 serves to correct and match the impedance of the input terminal and the output terminal such that the impedance between the transmission amplifier 20 and the RF antenna 60 is uniformly applied to each other.

즉, RF 단말기(60)와 스마트 카드가 13.56Mhz의 주파수를 이용하여 전자기 유도 방식으로 통신을 하는데 송신증폭부와 RF 안테나 간의 상호 적절한 임피던 스(Load)가 걸리도록 입력단과 출력단의 임피던스를 보정하여 맞춰주게 된다.That is, the RF terminal 60 and the smart card communicate using an electromagnetic induction method using a frequency of 13.56Mhz, and correct the impedance of the input terminal and the output terminal such that an appropriate impedance load is applied between the transmitting amplifier and the RF antenna. Will match.

이는 도 1에서 도시한 바와 같이, 캐패시터 C4,C5,C6,C7이 연결되어 구성된다.As shown in FIG. 1, the capacitors C4, C5, C6, and C7 are connected to each other.

즉, 송신증폭부(20)를 통한 입력 신호를 캐패시터 C4를 통해 평활한 후 캐패시터 C5에 충전시키고, RF 안테나의 출력 신호를 캐패시터 C6를 통해 평활한 후 캐패시터 C7에 충전시켜, 입력단과 출력단의 임피던스를 보정하여 맞춰주게 된다.That is, the input signal through the transmission amplifier 20 is smoothed through the capacitor C4 and then charged in the capacitor C5, and the output signal of the RF antenna is smoothed through the capacitor C6 and then charged in the capacitor C7, and the impedance of the input terminal and the output terminal is reduced. Will be corrected to fit.

본 발명에서는 이동통신 단말기에 RF 통신을 위한 NFC(Near Field Communication) 칩과 RF 안테나 사이, 또는 콤비(Combi) 칩과 RF 안테나 사이에 13.56Mhz RF 증폭을 할 수 있는 RF 성능향상모듈이 있어, 이동통신단말기내에 어떠한 13.56Mhz의 RF 칩이 들어와도 외부의 RF 리더와 안정적인 RF 통신을 할 수가 있다.In the present invention, there is an RF performance improvement module capable of amplifying 13.56Mhz RF between a NFC (Near Field Communication) chip and an RF antenna, or a Combi chip and an RF antenna in the mobile communication terminal, When any 13.56Mhz RF chip enters the communication terminal, stable RF communication with external RF reader is possible.

또한, 본 발명에서는 도 4에서 도시한 바와 같이, RF 성능향상모듈을 하나의 칩으로 구성하여 이동통신단말기에 RF 통신을 위한 NFC(Near Field Communication) 칩 또는 콤비(Combi) 칩 일측에 연결되도록 구성된다.In addition, in the present invention, as shown in Figure 4, by configuring the RF performance enhancement module as a single chip is configured to be connected to the NFC (Near Field Communication) chip or Combi (Combi) chip side for the RF communication to the mobile communication terminal do.

이하, 본 발명에 따른 이동통신단말기의 RF 성능향상모듈의 구체적인 동작과정에 관해 설명한다.Hereinafter, a detailed operation process of the RF performance improving module of the mobile communication terminal according to the present invention will be described.

도 3은 본 발명에 따른 RF 성능향상모듈이 NFC 칩과 RF 안테나사이에 설치되는 것을 도시한 일실시예도에 관한 것이다.Figure 3 relates to an embodiment showing that the RF performance improvement module according to the present invention is installed between the NFC chip and the RF antenna.

[수신과정][Receive process]

먼저, RF 단말기(버스, 지하철 등의 RF 결재 단말기)에서 전자기 유도를 통한 비접촉 RF 통신 데이터를 송출하면, RF 안테나에서 전자기 유도방식으로 RF 단말기의 RF 통신 데이터를 받아들인다.First, when the RF terminal (RF payment terminal such as a bus, subway, etc.) transmits the non-contact RF communication data through electromagnetic induction, the RF antenna receives the RF communication data of the RF terminal by the electromagnetic induction method.

이어서, RF 통신 데이터는 매칭부와 필터부를 지나 수신부인 다이오드 D1를 통해 정류하고, 캐패시터 C1을 통해 평활해서 스마트 카드에 RF 통신 데이터를 전달한다.Subsequently, the RF communication data is rectified through the matching unit and the filter unit through the diode D1, which is the receiving unit, and smoothed through the capacitor C1, and delivers the RF communication data to the smart card.

여기서, 필터부는 RF 단말기로부터 수신된 신호 중 RF 안테나와 송신출력부 사이에서 정상 신호외에 발생되는 노이즈(잡음)를 제거하는 역할을 한다.Here, the filter unit removes noise (noise) generated in addition to the normal signal between the RF antenna and the transmission output unit among the signals received from the RF terminal.

그리고, 매칭부는 수신부와 RF 안테나간의 연결부위에 상호 균일한 임피던스가 걸리도록 입력단과 출력단의 임피던스를 보정하여 맞춰주는 역할을 하게 된다.The matching unit serves to correct and match the impedance of the input terminal and the output terminal such that the impedance between the receiving unit and the RF antenna is uniformly applied to each other.

또한, 수신부는 RF 통신데이터 신호를 OP앰프의 (+)입력단자에 입력시키고, 저항 R1과 저항 R3를 통해 분압된 전압을 OP앰프의 (-)입력단자에 입력하여 게인컨트롤부의 지수만큼 증폭하여 출력하고, 그 출력 신호를 캐패시터 C2에 충전하여 스마트 카드에 RF 통신 데이터를 전달한다.In addition, the receiver inputs the RF communication data signal to the (+) input terminal of the OP amplifier, and inputs the voltage divided by the resistor R1 and the resistor R3 to the (-) input terminal of the OP amplifier to amplify by the index of the gain control unit Outputs and charges the output signal to capacitor C2 to transmit RF communication data to the smart card.

[송신 과정][Transmission process]

RF 단말기로부터 수신된 명령에 대한 스마트 카드의 회신 데이터를 전자기 유도 방식으로 송출시 출력을 높이도록 송신증폭부를 통해 증폭시켜 출력시킨다.The reply data of the smart card for the command received from the RF terminal is amplified and output through the transmission amplifier so as to increase the output when transmitting by the electromagnetic induction method.

이때, 송신증폭부는 스마트 카드의 회신 데이터 신호를 OP앰프의 (+)입력단자에 입력시키고, 저항 R3와 저항 R4를 통해 분압된 전압을 OP앰프의 (-)입력단자에 입력하여 게인컨트롤부의 지수만큼 증폭하여 출력하고, 그 출력 신호를 캐패시터 C1에 충전하여 필터부인 인덕터 L1에 전달한다.At this time, the transmission amplifier inputs the return data signal of the smart card to the (+) input terminal of the op amp, and inputs the voltage divided by the resistor R3 and the resistor R4 to the (-) input terminal of the op amp. It amplifies and outputs as much as possible, and charges the output signal to capacitor C1 and delivers it to inductor L1, which is a filter part.

그리고, 게인컨트롤부를 통해 스마트 카드의 회신 데이터 신호의 잡음 지수 레벨 크기에 따라 가변저항 R3와 R4를 통해 전압 분할되어 송신증폭부의 증폭을 조절한다.Then, the gain control unit divides the voltage through the variable resistors R3 and R4 according to the magnitude level of the noise figure of the return data signal of the smart card to adjust the amplification of the transmission amplifier.

이어서, 필터부인 인덕터 L1을 통해 송신증폭부에서 증폭된 스마트 카드의 회신 데이터 신호에서 발생되는 노이즈(잡음)를 제거한다.Subsequently, the noise (noise) generated in the reply data signal of the smart card amplified by the transmission amplifier through the inductor L1 as the filter unit is removed.

이어서, 매칭부를 통해 송신증폭부와 RF 안테나간의 연결부위에 상호 균일한 임피던스가 걸리도록 입력단과 출력단의 임피던스를 보정하여 맞춰주어 RF 단말기로 안전하게 RF 송신시킨다.Subsequently, the impedance of the input terminal and the output terminal is corrected and matched so that a uniform impedance is applied to the connection between the transmitting amplifier and the RF antenna through the matching unit, thereby safely transmitting the RF to the RF terminal.

즉, 송신증폭부를 통한 입력 신호를 캐패시터 C4를 통해 평활한 후 캐패시터 C5에 충전시키고, RF 안테나의 출력 신호를 캐패시터 C6를 통해 평활한 후 캐패시터 C7에 충전시켜, 입력단과 출력단의 임피던스를 보정하여 맞춰주어 RF 단말기로 안전하게 RF 송신시킨다.That is, the input signal through the transmission amplifier is smoothed through the capacitor C4 and then charged to the capacitor C5, and the output signal of the RF antenna is smoothed through the capacitor C6 and then charged to the capacitor C7 to correct the impedance of the input and output terminals. Secure RF transmission to the subject RF terminal.

또 다른 일예로, 도 4는 본 발명에 따른 RF 성능향상모듈이 콤비 칩과 RF 안 테나사이에 설치되는 것을 도시한 일실시예도에 관한 것이다.As another example, Figure 4 relates to an embodiment showing that the RF performance improvement module according to the present invention is installed between the combination chip and the RF antenna.

[수신과정][Receive process]

먼저, RF 단말기(버스, 지하철 등의 RF 결재 단말기)에서 전자기 유도를 통한 비접촉 RF 통신 데이터를 송출하면, RF 안테나에서 전자기 유도방식으로 RF 단말기의 RF 통신 데이터를 받아들인다.First, when the RF terminal (RF payment terminal such as a bus, subway, etc.) transmits the non-contact RF communication data through electromagnetic induction, the RF antenna receives the RF communication data of the RF terminal by the electromagnetic induction method.

이어서, RF 통신 데이터는 수신부인 저항 R3를 통해 센싱하고, 캐패시터 C5를 통해 평활해서 스마트 카드에 RF 통신 데이터를 전달한다.Subsequently, the RF communication data is sensed through the resistor R3, which is a receiving unit, and smoothed through the capacitor C5 to transmit the RF communication data to the smart card.

[송신 과정][Transmission process]

RF 단말기로부터 수신된 명령에 대한 스마트 카드의 회신 데이터를 전자기 유도 방식으로 송출시 출력을 높이도록 송신증폭부를 통해 증폭시켜 출력시킨다.The reply data of the smart card for the command received from the RF terminal is amplified and output through the transmission amplifier so as to increase the output when transmitting by the electromagnetic induction method.

이때, 송신증폭부는 스마트 카드의 회신 데이터 신호를 OP앰프의 (+)입력단자에 입력시키고, 저항 R1과 저항 R2를 통해 분압된 전압을 OP앰프의 (-)입력단자에 입력하여 게인컨트롤부의 지수만큼 증폭하여 출력하고, 그 출력 신호를 필터부인 인덕터 L1에 전달한다.At this time, the transmission amplifier inputs the return data signal of the smart card to the (+) input terminal of the op amp, and inputs the voltage divided by the resistor R1 and the resistor R2 to the (-) input terminal of the op amp. It amplifies and outputs as much as the output signal, and transmits the output signal to the inductor L1 which is a filter part.

그리고, 게인컨트롤부를 통해 스마트 카드의 회신 데이터 신호의 잡음 지수 레벨 크기에 따라 송신증폭부의 증폭을 조절한다.Then, the gain control unit adjusts the amplification of the transmission amplifier according to the noise figure level of the return data signal of the smart card.

이어서, 필터부인 인덕터 L1을 통해 송신증폭부에서 증폭된 스마트 카드의 회신 데이터 신호에서 발생되는 노이즈(잡음)를 제거한다.Subsequently, the noise (noise) generated in the reply data signal of the smart card amplified by the transmission amplifier through the inductor L1 as the filter unit is removed.

이어서, 매칭부를 통해 송신증폭부와 RF 안테나간의 연결부위에 상호 균일한 임피던스가 걸리도록 입력단과 출력단의 임피던스를 보정하여 맞춰주어 RF 단말기로 안전하게 RF 송신시킨다.Subsequently, the impedance of the input terminal and the output terminal is corrected and matched so that a uniform impedance is applied to the connection between the transmitting amplifier and the RF antenna through the matching unit, thereby safely transmitting the RF to the RF terminal.

즉, 송신증폭부를 통한 입력 신호를 캐패시터 C2를 통해 평활한 후 캐패시터 C1에 충전시키고, RF 안테나의 출력 신호를 캐패시터 C3를 통해 평활한 후 캐패시터 C4에 충전시켜, 입력단과 출력단의 임피던스를 보정하여 맞춰주어 RF 단말기로 안전하게 RF 송신시킨다.That is, the input signal through the transmission amplifier is smoothed through the capacitor C2 and then charged to the capacitor C1, and the output signal of the RF antenna is smoothed through the capacitor C3 and then charged to the capacitor C4 to correct the impedance of the input and output terminals. Secure RF transmission to the subject RF terminal.

도 1은 이동통신단말기에 내장된 NFC(Near Field Communication) 칩과 RF 안테나 사이, 또는 콤비(Combi) 칩과 RF 안테나 사이에 설치되는 RF 성능향상 모듈을 도시한 블록도,1 is a block diagram illustrating an RF performance improvement module installed between a NFC (Near Field Communication) chip embedded in a mobile communication terminal and between a Combi chip and an RF antenna.

도 2는 본 발명에 따른 RF 성능향상모듈의 구성요소를 도시한 블록도,2 is a block diagram showing the components of the RF performance improvement module according to the present invention;

도 3은 본 발명에 따른 RF 성능향상모듈이 NFC 칩과 RF 안테나사이에 설치되는 것을 도시한 일실시예도,Figure 3 is an embodiment showing that the RF performance improvement module according to the present invention is installed between the NFC chip and the RF antenna,

도 4는 본 발명에 따른 RF 성능향상모듈이 콤비 칩과 RF 안테나사이에 설치되는 것을 도시한 일실시예도,Figure 4 is an embodiment showing that the RF performance improvement module according to the present invention is installed between the combination chip and the RF antenna,

도 5는 본 발명에 따른 이동통신단말기의 RF 성능향상모듈을 이용한 RF 성능향상방법을 도시한 순서도.5 is a flowchart illustrating an RF performance improving method using the RF performance improving module of the mobile communication terminal according to the present invention.

※ 도면 부호의 간단한 설명 ※※ Brief description of reference numerals ※

10 : 수신부 20 : 송신증폭10: receiver 20: transmission amplification

30 : 게인컨트롤부 40 : 필터부30: gain control unit 40: filter unit

50 : 매칭부 60 : RF 안테나50: matching unit 60: RF antenna

Claims (5)

이동통신단말기에 내장된 NFC(Near Field Communication) 칩과 RF 안테나 사이, 또는 콤비(Combi) 칩과 RF 안테나 사이에 설치되는 RF 성능향상 모듈에 있어서,In the RF performance improvement module installed between the NFC (Near Field Communication) chip and the RF antenna, or between the Combi chip and the RF antenna built in the mobile communication terminal, 상기 RF 성능향상 모듈은 RF 단말기의 전자기 유도를 통한 비접촉 RF 통신 데이터가 송출되면, RF 안테나를 통해 전자기 유도방식으로 받아들인 RF 통신 데이터를 스마트 카드에 전달하는 수신부(10)와,The RF performance improving module includes a receiving unit 10 for transmitting RF communication data received by electromagnetic induction through the RF antenna to a smart card when non-contact RF communication data is transmitted through electromagnetic induction of the RF terminal; 그 수신부(10)를 통해 RF 단말기로부터 수신된 명령에 대한 스마트 카드의 회신 데이터를 전자기 유도 방식으로 송출시 증폭시킨 후, RF 안테나를 통해 송출시키는 송신증폭부(20)와,A transmission amplification unit 20 for amplifying the reply data of the smart card for the command received from the RF terminal through the reception unit 10 in an electromagnetic induction method and then transmitting the RF data through the RF antenna; 그 송신증폭부(20) 일측에 연결되어 송신증폭부의 증폭율을 제어하는 게인컨트롤부(Gain Control)(30)와,A gain control unit 30 connected to one side of the transmission amplifier 20 to control an amplification factor of the transmission amplifier; RF 단말기(2)로부터 수신된 신호 중 RF 안테나(60)와 송신증폭부(20) 사이에서 정상 신호외에 발생되는 노이즈(잡음)를 제거하거나, 또는 송신증폭부(20)를 통해 증폭된 스마트 카드의 회신 데이터 신호에서 발생되는 노이즈(잡음)를 제거하는 필터부(40)와,Among the signals received from the RF terminal 2, the noise (noise) generated in addition to the normal signal between the RF antenna 60 and the transmission amplifier 20, or the smart card amplified through the transmission amplifier 20 A filter unit (40) for removing noise (noise) generated in the reply data signal of 수신부(10)와 RF 안테나(60)간의 연결부위 또는, 송신증폭부(20)와 RF 안테나(60)간의 연결부위에 상호 균일한 임피던스가 걸리도록 입력단과 출력단의 임피던스를 보정하여 맞춰주는 매칭부(50)로 구성되어 모듈화되는 것을 특징으로 하는 이동통신단말기의 RF 성능향상모듈.Matching unit for correcting and matching the impedance of the input terminal and the output terminal so as to apply a uniform impedance to each other between the connection portion between the receiver 10 and the RF antenna 60 or the connection between the transmission amplifier 20 and the RF antenna 60 RF performance improvement module of the mobile communication terminal, characterized in that consisting of 50. 제1항에 있어서, 송신증폭부(20)는 스마트 카드의 회신 데이터 신호를 OP앰프의 (+)입력단자에 입력시키고, 저항 R3와 저항 R4를 통해 분압된 전압을 OP앰프의 (-)입력단자에 입력하여 게인컨트롤부의 지수만큼 증폭하여 출력하고, 그 출력신호를 캐패시터 C1에 충전하여 필터부인 인덕터 L1에 연결되도록 구성되는 것을 특징으로 하는 이동통신단말기의 RF 성능향상모듈.The transmitting amplifier 20 inputs the return data signal of the smart card to the (+) input terminal of the op amp, and the voltage divided by the resistor R3 and the resistor R4 is input to the (-) input of the op amp. The RF performance improvement module of the mobile communication terminal, characterized in that configured to be input to the terminal and amplified by the gain of the gain control unit, the output signal is charged to the capacitor C1 and connected to the inductor L1 which is the filter unit. 제1항에 있어서, 게인컨트롤부(Gain Control)(30)는 저항 R1 및 R2의 비율로 증폭도(G)를 조정될 수 있도록 R2가 가변 저항으로 구성되는 것을 특징으로 하는 이동통신단말기의 RF 성능향상모듈.The RF performance of the mobile communication terminal according to claim 1, wherein the gain control section 30 is configured of a variable resistor so that the gain A can be adjusted at a ratio of the resistors R1 and R2. Enhancement module. 제1항에 있어서,RF 성능향상 모듈은 하나의 칩으로 구성되는 것을 특징으로 하는 이동통신단말기의 RF 성능향상모듈.The RF performance improving module of claim 1, wherein the RF performance improving module comprises one chip. RF 단말기(버스, 지하철 등의 RF 결재 단말기)에서 전자기 유도를 통한 비접 촉 RF 통신 데이터를 송출하면, RF 안테나에서 전자기 유도방식으로 RF 단말기의 RF 통신 데이터를 받아들이고, 그 RF 통신 데이터를 수신부를 통해 스마트 카드에 RF 통신 데이터를 전달하는 단계(S100)와, When the RF terminal (RF approval terminal such as a bus or subway) transmits non-contact RF communication data through electromagnetic induction, the RF antenna receives the RF communication data of the RF terminal by electromagnetic induction and receives the RF communication data through the receiver. Delivering the RF communication data to the smart card (S100), RF 단말기로부터 수신된 명령에 대한 스마트 카드의 회신 데이터를 전자기 유도 방식으로 송출시 출력을 높이도록 송신증폭부를 통해 증폭시켜 출력시키는 단계(S200)와,Amplifying and outputting the reply data of the smart card with respect to the command received from the RF terminal through the transmission amplifier to increase the output when transmitting in an electromagnetic induction method (S200); 게인컨트롤부를 통해 스마트 카드의 회신 데이터 신호의 잡음 지수 레벨 크기에 따라 송신증폭부의 증폭을 조절하는 단계(S300)와,Adjusting amplification of the transmission amplifier according to the noise figure level of the reply data signal of the smart card through the gain controller (S300); 필터부를 통해 송신증폭부에서 증폭된 스마트 카드의 회신 데이터 신호에서 발생되는 노이즈(잡음)를 제거하는 단계(S400)와,Removing noise (noise) generated in the reply data signal of the smart card amplified by the transmission amplifier through the filter unit (S400); 매칭부를 통해 송신증폭부와 RF 안테나간의 연결부위에 상호 균일한 임피던스가 걸리도록 입력단과 출력단의 임피던스를 보정하여 맞춰주어 RF 단말기로 안전하게 RF 송신시키는 단계(S500)로 이루어지는 것을 특징으로 하는 이동통신단말기의 RF 성능향상모듈을 이용한 RF 성능향상방법.A mobile communication terminal comprising the step of correcting the impedance of the input terminal and the output terminal to match the impedance between the transmitting amplifier and the RF antenna through the matching unit to be secured to the RF terminal (S500). RF Performance Enhancement Method Using RF Performance Enhancement Module.
KR1020070132179A 2007-12-17 2007-12-17 The method and moudle of radio frquency KR100809051B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070132179A KR100809051B1 (en) 2007-12-17 2007-12-17 The method and moudle of radio frquency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070132179A KR100809051B1 (en) 2007-12-17 2007-12-17 The method and moudle of radio frquency

Publications (1)

Publication Number Publication Date
KR100809051B1 true KR100809051B1 (en) 2008-03-03

Family

ID=39397361

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070132179A KR100809051B1 (en) 2007-12-17 2007-12-17 The method and moudle of radio frquency

Country Status (1)

Country Link
KR (1) KR100809051B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101132627B1 (en) * 2009-10-26 2012-04-03 주식회사 케이티 smart card having multiple contact and mobile terminal using it
WO2014004779A1 (en) * 2012-06-29 2014-01-03 Intel Corporation Spiral near field communication (nfc) coil for consistent coupling with different tags and devices
US9172786B2 (en) 2009-04-01 2015-10-27 AQ Corporation Apparatus and method for controlling functions of a mobile phone using near field communication (NFC) technology
CN110492910A (en) * 2019-07-11 2019-11-22 广州幻境科技有限公司 A kind of NFC signal conditioning system and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980052717A (en) * 1996-12-24 1998-09-25 유기범 Low Noise Amplification Circuit of Mobile Communication Terminal
KR19990075249A (en) * 1998-03-18 1999-10-15 김영환 Single-tone and intermodulation distortion improvement device
KR20010104054A (en) * 2000-05-12 2001-11-24 송문섭 Device for receiving rf in mobile communication phone
KR20070028849A (en) * 2005-09-08 2007-03-13 에스케이 텔레콤주식회사 Apparatus and method for performing secure nfc with secure application modules in plug-in type

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980052717A (en) * 1996-12-24 1998-09-25 유기범 Low Noise Amplification Circuit of Mobile Communication Terminal
KR19990075249A (en) * 1998-03-18 1999-10-15 김영환 Single-tone and intermodulation distortion improvement device
KR20010104054A (en) * 2000-05-12 2001-11-24 송문섭 Device for receiving rf in mobile communication phone
KR20070028849A (en) * 2005-09-08 2007-03-13 에스케이 텔레콤주식회사 Apparatus and method for performing secure nfc with secure application modules in plug-in type

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10063994B2 (en) 2009-04-01 2018-08-28 AQ Corporation Mobile phone and method for near field communication
US10536837B2 (en) 2009-04-01 2020-01-14 AQ Corporation Mobile terminal and method for near field communication
US9172786B2 (en) 2009-04-01 2015-10-27 AQ Corporation Apparatus and method for controlling functions of a mobile phone using near field communication (NFC) technology
US9307352B2 (en) 2009-04-01 2016-04-05 AQ Corporation Apparatus and method for near field communication
US9351104B2 (en) 2009-04-01 2016-05-24 AQ Corporation Mobile phone and method for near field communication
US10945110B2 (en) 2009-04-01 2021-03-09 AQ Corporation Mobile terminal and method involving near field communication
US10721606B2 (en) 2009-04-01 2020-07-21 AQ Corporation Mobile terminal and method involving near field communication
US10299097B2 (en) 2009-04-01 2019-05-21 AQ Corporation Mobile terminal and method for near field communication
KR101132627B1 (en) * 2009-10-26 2012-04-03 주식회사 케이티 smart card having multiple contact and mobile terminal using it
US10325708B2 (en) 2012-06-29 2019-06-18 Intel Corporation Spiral near field communication (NFC) antenna coil
WO2014004779A1 (en) * 2012-06-29 2014-01-03 Intel Corporation Spiral near field communication (nfc) coil for consistent coupling with different tags and devices
US9934895B2 (en) 2012-06-29 2018-04-03 Intel Corporation Spiral near field communication (NFC) coil for consistent coupling with different tags and devices
CN110492910A (en) * 2019-07-11 2019-11-22 广州幻境科技有限公司 A kind of NFC signal conditioning system and method
CN110492910B (en) * 2019-07-11 2021-07-20 广州幻境科技有限公司 NFC signal adjusting system and method

Similar Documents

Publication Publication Date Title
US8509340B2 (en) Signal transmission system
EP2541995B1 (en) Method and apparatus for reducing power consumption of a NFC powered device
US20030183691A1 (en) Smart card reader
CN101292254B (en) Electronic circuit for a contactless reader device
SI2284773T2 (en) Chip card
US11671137B2 (en) Electronic device and method for identifying components corresponding to designated frequency band included in transmission signal
KR100809051B1 (en) The method and moudle of radio frquency
CN103988213A (en) Antenna interface for radio frequency identification circuit
US7458513B2 (en) IC card reading apparatus and its related method
KR20130134570A (en) Near-field wireless transceiver circuit and mobile terminal
EP3267589B1 (en) System to process a high voltage antenna signal within an integrated circuit
US9684808B2 (en) Wireless communication apparatus and mobile device
CN101655925B (en) Close coupling radio frequency identification devices (RFID) tag and control method thereof
US20210158120A1 (en) Method of monitoring and controlling a level of power transmitted by an antenna of a contactless communication device
US11544480B2 (en) Method for compensating for a phase shift between the signal emitted by an object and that received from a reader equipped with an envelope detector and corresponding object
CA2898428C (en) Amplifier circuit, antenna module, and radio communication device
US11309923B2 (en) Method using signal component of multiplied frequency and electronic device therefor
CN114792103A (en) Receiver, system and method of operation of a receiver
KR20010078661A (en) Portable telephone with noncontact type rf ic chip
CN114765466B (en) Managing contactless communication and contactless charging and corresponding contactless devices
EP1826712B1 (en) Adaptor for contact and contactless smart cards
EP4131781A1 (en) Switch and electronic device including switch
CN101542927A (en) Signal transmission system
SK500292015A3 (en) Method of processing of signal transmitted from the analog NFC driver and system for realization of said method
CN118054813A (en) Near field communication circuit for intelligent traffic

Legal Events

Date Code Title Description
A201 Request for examination
A302 Request for accelerated examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20130218

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20140225

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20150225

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20160323

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20180124

Year of fee payment: 11

FPAY Annual fee payment

Payment date: 20190110

Year of fee payment: 12

FPAY Annual fee payment

Payment date: 20200221

Year of fee payment: 13