KR100761252B1 - Selection Device of RF Antenna in Mobile Telecommunication Terminal - Google Patents

Abstract

The present invention relates to an RF antenna selection device of the mobile communication terminal (2). The RF antenna selection device 1 of the present invention is an RF of a mobile communication terminal 2 equipped with a smart chip 10 having a non-contact payment function, an RF reading chip 20 having an RF reading function, and an RF antenna 30. An antenna selection device comprising: a first terminal 31 connected to a first terminal 31 of an RF antenna 30 and branched at a branch point 41 and connected to an antenna terminal of a smart chip 10 and an RF reading chip 20, respectively. Line 40; A second line 50 connected to the second terminal 32 of the RF antenna 30 and branched from the branch 51 to the antenna terminals of the smart chip 10 and the RF read chip 20; A smart chip switching circuit 60 installed at any one of the smart chip lines 42 and 52 between the branch points 41 and 51 and the smart chip 10; An RF read chip switching circuit 70 provided at any one of the RF read chip lines 43 and 53 between the branch points 41 and 51 and the RF read chip 20; And selectively intervening the smart chip switching circuit 60 and the RF read chip switching circuit 70 according to the operation of the user interface of the mobile communication terminal 2 so that the RF antenna 30 may be the smart chip 10 or the RF read chip. A controller 80 to be selectively used for 20; It includes. Preferably it may further include a ground line 90 connected between one point 33 of the RF antenna 30 and the antenna terminal of the RF readout chip 20, the ground line 90 by the controller 80 A ground switching circuit 91 which is selectively interrupted in the same pattern as that of the RF read chip switching circuit 70 is provided.

Description

RF antenna selection device of a mobile communication terminal {Selection Device of RF Antenna in Mobile Telecommunication Terminal}

1 is a block diagram of a mobile phone to which an exemplary RF antenna selection device according to the present invention is applied;

2 is an exemplary use flow diagram of an RF antenna selection device in accordance with the present invention;

Fig. 3 is a block diagram of a mobile phone incorporating a conventional combination chip and RF read chip.

<Explanation of symbols for main parts of the drawings>

1: RF antenna selection device of the present invention 2: Mobile communication terminal (mobile phone)

3: CPU 4: User Interface (Key Input)

5: battery 6: blacklist control

10: smart chip 11, 21: matching circuit

20: RF reader chip 30: RF antenna

31: Terminal 1 32: Terminal 2

33: One point of RF antenna 40: First line

41, 51: branch 42, 52: smart chip line

43, 53: RF readout chip line 50: second line

60: smart chip switching circuit 70: RF read chip switching circuit

80: control unit 90: ground line

91: ground switching circuit

(Technology)

The present invention relates to an RF antenna selection device of a mobile communication terminal, and more particularly, in a mobile communication terminal in which two or more chips (cards) requiring an RF antenna are mounted, a plurality of chips can be used. The present invention relates to an RF antenna selection device of a mobile communication terminal that can be used in common.

(Background)

As is widely known, a smart card equipped with an electronic chip having a microprocessor, an operating system, a security module, a memory, and the like to have a storage function, a calculation function, and a security function is used for finance, communication, education, administration, transportation, etc. It is widely used in almost all fields of the information and telecommunications society as a means of recording information, verifying identity, electronic money, credit card or electronic bank account.

Smart chips (cards) are classified into various types according to their classification criteria, but may be classified into contact-chips (cards), contactless-chips (cards), and combined-chips (cards) according to the way data is read.

A contact smart chip refers to a form in which a smart chip is activated by contacting a smart chip contact with a contact of an interface device. A non-contact smart chip is the same as that of a contact type and a memory element required for an information processing function, but to drive a smart chip The power supply for the card is made through the RF antenna of the RFID (Radio Frequency Identification) system, and it is a type of card that uses an electromagnetic induction method for communication with the interface device.The combined smart chip supports smart contact and non-contact functions. The representative combination chip as a chip is a smart chip configured to share parts in which a contact / contactless type can be shared in one chip.

As the field of use of mobile communication terminals (eg mobile phones) and smart chips has been further expanded and mobile communication terminals have become a necessity of life, smart chips are mounted on mobile communication terminals rather than traditional plastic cards such as transportation cards and credit cards. It has developed into a form that becomes.

An example of applying a smart chip to a mobile communication terminal is a mobile phone equipped with a non-contact smart chip and an RF antenna to pay for traffic in advance. Such a mobile phone can be simply a conventional prepaid transportation card installed in a mobile phone.

As another example of a mobile communication terminal to which a smart chip is applied, an electronic passbook function, which is equipped with a combination chip including both contact and contactless types, can perform account inquiry, transfer, withdrawal and check inquiry through mobile communication as a contact function. A mobile phone equipped with a non-contact function and a prepaid traffic card function; A mobile phone equipped with a credit card function as a contact function and a traffic card function as a contactless function to postpaid transportation charges by credit card without prepaid charging; By installing two or more smart chips and RF antennas with different functions in the mobile communication terminal and allowing the functions of these smart chips to be selectively used according to user conditions and tastes, non-financial management such as royalty management or identification There are mobile phones that allow users to select and use functions and financial functions such as credit cards and electronic accounts.

In addition to the non-contact smart chip of the mobile communication terminal that mainly applies the RFID technology to the payment function, another representative system to apply the RFID technology is an RF reader that reads and decodes and an RF with built-in information. There is an RF reading system, which consists of an RFID tag and associated operating software, which non-contactly identifies an RF tag and processes various information.

The RF reading system is used as a system for transmitting and receiving P2P by contactless contact information using wireless communication in various fields such as document management, logistics management, identity verification, document authentication, etc. It has become possible, and its scope of use is gradually expanding.

The RF reader reads the unique information recorded on the RF tag through wireless communication with the RF tag, including the transceiver, the decoder, and the antenna, and inputs new information into the RF tag when the RF tag is a tag that can be read and written. Sometimes.

RF tags, including semiconductor transponder chips and antennas, provide unique information recorded through communication with RF readers, and are passive and battery operated by receiving energy from radio signals from the reader without an internal power source. There is an included active type, and is provided in various forms such as tag type as well as card type or label type.

In order to operate an RF reading system, an RF reader capable of reading an RF tag is required. In practice, without such an RF reader, the information of the RF tag cannot be utilized. In connection with this, a technology has been proposed that allows a mobile communication terminal to be used for reading an RF tag by combining an RF reader with a mobile communication terminal (eg, a mobile phone) that is widely used as a daily necessity.

A typical solution to which such an RF reading system is applied is an NFC chip standardized to a near field communication standard ISO 17092 or the like which is mounted on a mobile phone or the like and has a function as an RF reader as well as an RF tag. Such a NFC chip is a kind of smart chip that has both a function as an RF reader mounted on a mobile phone and the like to read the information recorded on the RF tag and an RF tag that reads the information recorded by the other RF reader. can do.

In addition, another solution using the RF reading system is a system in which an RF reading chip supporting the ISO 14443 and ISO 15693 standards is applied to a mobile phone so that the tag information can be read by the mobile phone. In this case, the handset only reads RF and does not provide a P2P solution through the tag function supported by the NFC chip.

Hereinafter, the RF chip includes both the NFC chip supporting both the RF reader and the function of the RF tag and the RF reader chip supporting only the RF reading function.

As described above, in recent years, a mobile communication terminal (mobile phone) has a smart chip with various functions equipped with an RFID solution, and in some cases, two or more RFID-based chips (for example, a smart card with a traffic card function) Since the RF reader chip is also mounted, an RF antenna is basically required for each chip.

Fig. 3 is a block diagram of a portable telephone incorporating a conventional combination chip and RF read chip.

As shown, the mobile phone 100 is provided with a combination chip 110 and an RF reading chip 120 having a non-contact function (eg, a traffic card function), and the combination chip 110 has an RF antenna 111 for a combination chip. ) Is connected via a matching circuit 112 bonded thereto, and an RF read chip RF antenna 121 is connected to the RF read chip 120 through a matching circuit 122 suitable thereto. The operation of the combination chip 110 and the RF reading chip 120 is controlled by a microcontroller unit (MCU) 130 through the CPU 101 of the mobile phone 100.

As is well known, the RF antenna 111 for the combi chip has two lines connected to two antenna terminals of the combi chip 110, and the RF antenna 121 for the RF read chip has three lines of three of the RF read chip. It is connected to the antenna terminal.

As described above, in the conventional mobile communication terminal, all antennas are generally embedded in the mobile communication terminal when a plurality of RF antennas having different characteristics are to be mounted.

However, since mounting a plurality of RF antennas in a mobile phone having a limited space is difficult to utilize space, it is necessary to share a single RF antenna on all chips having a non-contact function.

SUMMARY OF THE INVENTION An object of the present invention is to install a plurality of antennas by installing only one RF antenna in an environment in which two or more chips having an RF contactless function are installed in a mobile communication terminal such as a cellular phone. This is to overcome the difficulties in utilizing the space of the mobile communication terminal.

An object of the present invention is to use by mounting only one RF antenna in a mobile communication terminal that requires two RF antennas having different characteristics from each other because a smart chip having a contactless payment function and an RF reading chip having an RF reading function are installed. According to the chip selection mode, one RF antenna is intended to realize the function of two RF antennas having different characteristics.

According to the present invention, there is provided an RF antenna selection apparatus of a mobile communication terminal, which is provided with a smart chip of a contactless payment function, an RF reading chip of an RF reading function, and an RF antenna.

An RF antenna selection device of a mobile communication terminal according to the present invention is an RF antenna selection device of a mobile communication terminal, which is provided with a smart chip of a contactless payment function, an RF reading chip of an RF reading function, and an RF antenna. A first line connected to one terminal and branched at a branch point and connected to antenna terminals of the smart chip and the RF read chip, respectively; A second line connected to the second terminal of the RF antenna and branched at a branch point and connected to the antenna terminals of the smart chip and the RF read chip, respectively; A smart chip switching circuit installed at any one of the smart chip lines between the branch point and the smart chip; An RF read chip switching circuit installed at any one of an RF read chip line between the branch point and the RF read chip; And a controller configured to selectively control the smart chip switching circuit and the RF read chip switching circuit according to an operation of a user interface of the mobile communication terminal so that the RF antenna is selectively used for the smart chip or the RF read chip. It includes.

Preferably, the RF antenna selection device of the mobile communication terminal according to the present invention further comprises a ground line connected between one point of the RF antenna and the antenna terminal of the RF read chip, the ground line is the RF by the controller; A ground switching circuit which is selectively interrupted in the same pattern as that of the read chip switching circuit is provided.

Preferably, the RF antenna selection device of the mobile communication terminal according to the present invention, when the contactless operation of the smart chip or the RF read chip is completed, the smart chip switching circuit, the RF read chip switching circuit and the ground switching circuit controls In this case, the RF antenna is restored to the normal standby mode in which the RF antenna is connected to the selected one of the smart chip and the RF read chip.

In the present invention, the RF reading chip is defined as a concept including a chip supporting only an RF reading function as well as a chip supporting both an RF reading and an RF tag function.

Hereinafter, an RF antenna selection apparatus of a mobile communication terminal according to the present invention will be described in detail with reference to the accompanying drawings. The following embodiments merely illustrate the RF antenna selection apparatus according to the present invention, but are not intended to limit the scope of the present invention.

Fig. 1 is a block diagram of a cellular phone to which an exemplary RF antenna selection device according to the present invention is applied, and Fig. 2 is an exemplary use flowchart of the RF antenna selection device according to the present invention.

As shown, a mobile communication terminal 2 (for example, a mobile phone, described below with reference to a mobile phone) to which the RF antenna selection device 1 according to the present invention is applied includes a basic configuration of a conventional mobile phone. .

That is, the mobile phone 2, like a general mobile phone, includes a CPU (e.g., Qualcomm chip) for controlling mobile communication functions as a whole, and a key input unit for inputting various data and commands (user interface: 4). And a monitor for displaying various information regarding the use of the mobile phone, a memory for storing programs for the overall operation of the mobile phone and various data input and output, and an antenna and a duplexer for mobile communication with the base station through the antenna. It basically includes a communication unit, an audio unit having a speaker and a microphone for a call, and a power supply unit 5 (battery) for supplying power. In the accompanying drawings, components other than the CPU 3, a user interface 4 (key input unit) where the user controls various operations through the CPU 3, and the battery 5 are omitted.

Accordingly, the mobile phone 2 to which the present invention is applied inputs predetermined data and commands using the user interface 4, monitors related information through the monitor, stores and deletes data necessary for the memory, and the communication unit. Through the mobile communication, all of these operations are controlled by the CPU (3).

The mobile phone 2 to which the present invention is applied includes a smart chip 10 (for example, a combi chip) and an RF reading function or an RF reading function and an RF tag function equipped with a non-contact function such as a payment function as described in the background art. The mounted RF readout chip 20 is mounted.

In addition, the mobile phone 2 is provided with an RF antenna 30 for the non-contact RF function of the smart chip 10 and the RF reading chip 20. The RF antenna 30 is a conventional antenna for use in an RFID system that performs a predetermined function by short-range wireless communication. Preferably, the RF antenna 30 has a position capable of receiving the minimum electromagnetic wave blocking action applied to the cellular phone 2, for example. It can be built in the battery 5.

Both the smart chip 10 and the RF readout chip 20 are integrally mounted in the circuit of the mobile phone 2, or both are detachably mounted in the mobile phone 2, or one is mounted and one is removable. There is no limitation in the mounting form such as being mounted.

According to a feature of the invention, the mobile phone 2 is provided with an RF antenna selection device 1. The RF antenna selection device 1 uses the smart chip 10 and the RF readout chip 20 mounted on the mobile phone 2, depending on which chip 10 and 20 functions the user selects. The RF antenna 30 operates only on a chip.

The RF antenna selection device 1 according to the present invention includes a first line 40, a second line 50, a smart chip switching circuit 60, an RF read chip switching circuit 70, and a controller 80. It is configured to include, and optionally further comprises a ground line 90 and the ground switching circuit 91 provided in the ground line (90).

The first line 40 includes a first terminal 31 which is one of two terminals 31 and 32 of the RF antenna 30 and an antenna terminal of the smart chip 10 and the RF read chip 20. As a line connecting each other, in order to be connected to the antenna terminals of both the smart chip 10 and the RF read chip 20, one end is connected to the RF antenna 30 as a single line, but the other end is a branch point 41 ) Into two lines (smart chip line 42, and RF read chip line 43).

The second line 50 is a line connecting the second terminal 32, which is the remaining terminal of the two terminals of the RF antenna 30, and the antenna terminals of the smart chip 10 and the RF read chip 20, respectively. As the first line 40, in order to be connected to the antenna terminals of both the smart chip 10 and the RF read chip 20, one end is connected to the RF antenna 30 as a single line, but the other end is a branch point ( 51) into two lines (smart chip line 52, and RF read chip line 53).

Thus, the smart chip 10 is connected to the first terminal 31 and the second terminal 32 of the RF antenna 30 by two smart chip lines 42 and 52, the RF read chip 20 is Since the first and second terminals 31 and 32 of the RF antenna 30 are connected by two RF read chip lines 43 and 53, the smart chip 10 and the RF read chip 20 are circuitically connected. The state is connected to one RF antenna (30).

The smart chip switching circuit 60 is an intermittent circuit installed at any one of the two smart chip lines 42 and 52 between the branch points 41 and 51 and the smart chip 10. In the illustrated embodiment, An example in which the smart chip switching circuit 60 is installed in the chip line 42 is illustrated.

The smart chip switching circuit 60 functions to selectively connect or disconnect the RF antenna 30 to the smart chip 10 by interrupting the electrical connection of the smart chip lines 42 and 52. Causes a contactless function (eg, a payment function) to be turned on or off.

The RF read chip switching circuit 70 is an interruption circuit provided at any one of the RF read chip lines 43 and 53 between the branch points 41 and 51 and the RF read chip 20. In the illustrated embodiment, An example in which the RF read chip switching circuit 70 is installed in the RF read chip line 53 is shown.

The RF readout chip switching circuit 70 functions to selectively connect or disconnect the RF antenna 30 to the RF readout chip 20 by interrupting the electrical connection of the RF readout chip lines 43 and 53. The non-contact function (e.g., RF read function) of 20 is switched to the enabled or disabled state.

The selective interruption of the smart chip switching circuit 60 and the RF read chip switching circuit 70 is executed by the controller 80. The controller 80 is functionally connected between the CPU 3 of the cellular phone 2 and the smart chip switching circuit 60 and the RF read chip switching circuit 70.

Therefore, when the user interface (key input unit: 4) of the mobile communication terminal 2 is operated, a selection signal for selecting the chips 10 and 20 to be used is sent to the CPU 3 according to the operation of the mounted program. The controller 80 receives a command corresponding to the selection signal from the CPU 3 to selectively interrupt the smart chip switching circuit 60 and the RF read chip switching circuit 70, thereby the RF antenna 30 is a smart chip. It is connected to the (10) or connected to the RF readout chip 20 so that only the chip (10, 20) to which the RF antenna 30 is connected to perform the non-contact function mounted.

Preferably, the ground line 90 may be connected between the one point 33 of the RF antenna 30 and the antenna terminal of the RF readout chip 20. The ground line 90 is a line connected only between the RF readout chip 20 and the RF antenna 30 and is not an essential component for the essential function of the RF antenna selector 1 according to the present invention. This is to remove the electromagnetic waves generated from the chip 20. Reference numeral 34 is a terminal of the ground line 90.

When the ground line 90 is added to the selection device 1 of the present invention, the ground line 90 is provided with a ground switching circuit 91. The ground switching circuit 91 is selectively interrupted by the controller 80 in the same pattern as that of the RF read chip switching circuit 70. That is, when the controller 80 connects the RF read chip 20 and the RF antenna 30 to the connected state, the ground switching circuit 91 is also connected, and the RF read chip 20 and the RF antenna 30 are disconnected. When the antenna 30 is connected to the smart chip 10, the ground switching circuit 91 is also disconnected.

Disconnecting the ground switching circuit 91 when the RF chip 30 is connected to the smart chip 10 and the smart chip 10 is in use state causes the smart chip 10 to approach the card reader to the RF antenna ( When the electromotive force is induced at 30, the induced electromotive force flows to the ground line 90 to prevent the RF antenna 30 from losing its function.

In the present invention, the control unit 80 has been described and illustrated in a configuration separate from the CPU 3 in order to clarify its features. However, in reality, the control unit 80 is equipped with a program that executes the present invention in the CPU 3 as the control unit 80. It would be desirable to have a function, and therefore it should be understood that the CPU 3 of the cellular phone 2 acting as the controller 80 is also within the scope of the present invention.

In FIG. 1, the matching circuit 11 installed over the smart chip lines 42 and 52 of the first line 40 and the second line 50 is used for the RF antenna 30 suitable for use in the smart chip 10. The matching circuit 21, which is a matching circuit and is provided over the RF read chip lines 43 and 53, is a matching circuit for the RF antenna 30 suitable for use in the RF read chip 20.

In an environment in which the smart chip 10 and the RF reading chip 20 are mounted in the mobile phone 2, the user may use more payment functions of the smart chip 10 or read the RF of the RF reading chip 20. More features are available.

According to the habit of using such a chip, a smart chip switching circuit is generally used after a mode in which a mode for selecting the use of a specific chip 10 or 20 is not applied, that is, the use of a certain chip 10 or 20 is completed. It may be desirable for the 60 and RF read chip switching circuits 70 to be set in a state where they can use the more used chips 10, 20.

In order to allow the preferred chip to be set in the normal standby mode as described above, the controller 80 may use the RF antenna 30 to perform contactless operation of the smart chip 10 or the RF read chip 20. When finished, it is configured to control the smart chip switching circuit 60 and the RF read chip switching circuit 70 so that the RF antenna 30 is connected to a frequently used chip among the smart chip 10 and the RF read chip 20. It is desirable to. In addition, setting the preferred chip to an operational state in the normal standby state can be set through the user interface 4 of the mobile communication terminal 2.

Hereinafter, an exemplary use of the RF antenna selection device according to the present invention will be described with reference to FIG.

First, when the power is turned on and the operation of the mobile phone starts, the smart chip switching circuit 60 and the RF read chip switching circuit 70 are operated by the operation of the CPU 3 and the controller 80 of the mobile phone 2. ) Is in the active state in which the chips 10 and 20 set in the normal standby mode are operable (S10). In the illustrated embodiment it is illustrated that the smart chip 10 is set to an operational state in the normal standby mode.

Subsequently, the CPU 3 of the cellular phone determines whether there is an input of the RF reading chip using mode through the key input unit 4 (S20), and if the RF reading chip using mode (YES), the smart through the control unit 80 By operating the chip switching circuit 60, the RF read chip switching circuit 70 and the ground switching circuit 91, the smart chip switching circuit 60 is turned off and the RF read chip switching circuit 70 and ground switching The circuit 91 is connected (ON) (S30). As a result, the RF antenna 30 is connected to the RF read chip 20 and separated from the smart chip 10 so that only the RF read chip 20 is activated so that the contactless function can be executed (S31).

After that, when the RF read chip 20 is operated and its contactless function is completed (S32), the smart chip switching circuit 60 is connected (ON) and the RF read chip switching circuit 70 and the ground switching circuit 91 Is disconnected (OFF) (S33), and returns to the normal standby mode immediately after the active state of the smart chip 10.

If the input through the key input unit 4 in step S20 is not the RF read chip using mode (NO), the smart chip active mode (that is, the smart chip switching circuit 60 is connected (ON) and the RF read chip switching in the normal standby mode) The circuit 70 and the ground switching circuit 91 remain disconnected (OFF) state (S40), thereby enabling only the smart chip 10 to be activated (S41).

Subsequently, when the smart chip 10 operates and the contactless function is completed (S42), the connection (ON) of the smart chip switching circuit 60 and the RF read chip switching circuit 70 and the ground switching circuit 91 Returning to the normal standby mode immediately after the active state of the smart chip 10 with the disconnection (OFF) is maintained as it is.

The RF antenna selection device of the present invention may further include a black list control unit 6 corresponding to the electronic money control device disclosed in Korean Patent No. 380270. The blacklist control unit 6 controls the payment function of the smart chip 10 to an available state or a restricted state.

That is, when the CPU 3 of the cellular phone 2 receives a control signal through mobile communication and sends the control signal to the non-contact function blacklist control unit 6, the blacklist control unit 6 conforms to the control signal. By intercepting the smart chip switching circuit 60, the operation of the RF antenna for the smart chip 10 is switched between the operation state and the non-operation state, whereby the payment function and the like of the smart chip 10 can be used and They are switched to the restricted state.

As the black list control unit 6 is added, black such as the need to temporarily or permanently stop or restart the RF payment function of a specific mobile phone, such as a charge delay, loss of a mobile phone, or cancellation of the use of a traffic card function. The list management can be performed in real time using the CPU of the mobile communication terminal through a mobile communication function unique to the mobile communication terminal.

In addition, although the configuration in which the blacklist control unit 6 is separated from the control unit 80 is illustrated in FIG. 1, in reality, the control unit 80 mounts a solution for blacklist control so that the control unit 80 controls the blacklist control unit 6. It is preferable to execute a function as), and it is also preferable that the CPU 3 of the cellular phone 2 functions as the black list control unit 6 together with the function of the control unit 80 as described above.

In the above description of the present invention, an example in which a mobile telephone is applied as a mobile communication terminal has been mainly described. Naturally, the present invention can be applied to other mobile communication terminals including a PDA having a function as it is.

In addition, in the above description, only the case where the smart chip 10 and the RF reading chip 20 is mounted and described, but the smart chip 10 and the RF reading chip 20, even if two or more are installed in the present description The device 1 of the invention can be adapted accordingly.

According to the RF antenna selection device (1) of the mobile communication terminal according to the present invention described above, the device is a mobile communication device such as a mobile phone equipped with a smart chip 10 and an RF reading chip 20 having a non-contact function When applied to a terminal, by installing only one antenna, it is possible to select a chip to be used according to a user's demand without burdening the space of a limited mobile communication terminal and conveniently use it without mutual collision between chips. There is.

Claims (3)

In the RF antenna selection device of the mobile communication terminal 2, which is provided with a smart chip 10 of a contactless payment function, an RF reading chip 20 of an RF reading function and an RF antenna 30, A first line connected to the first terminal 31 of the RF antenna 30 and branched at a branch point 41 and connected to the antenna terminals of the smart chip 10 and the RF read chip 20, respectively. 40); A second line connected to the second terminal 32 of the RF antenna 30 and branched at a branch 51 to the antenna terminals of the smart chip 10 and the RF read chip 20, respectively. 50); A smart chip switching circuit 60 installed at any one of the smart chip lines 42 and 52 between the branch points 41 and 51 and the smart chip 10; An RF read chip switching circuit (70) provided at any one of the RF read chip lines (43, 53) between the branch points (41, 51) and the RF read chip (20); And The smart chip switching circuit 60 and the RF read chip switching circuit 70 are selectively interrupted according to an operation of the user interface of the mobile communication terminal 2, so that the RF antenna 30 is connected to the smart chip 10. Or a controller 80 to be selectively used for the RF read chip 20; An RF antenna selection apparatus of a mobile communication terminal, comprising a. The ground line 90 of claim 1, further comprising a ground line 90 connected between one point 33 of the RF antenna 30 and an antenna terminal of the RF readout chip 20. An RF antenna selection device for a mobile communication terminal, characterized in that a ground switching circuit (91) which is selectively interrupted by the control unit (80) in the same pattern as that of the RF read chip switching circuit (70) is provided. According to claim 1 or 2, When the contactless operation of the smart chip 10 or the RF readout chip 20 is completed, the selected one of the smart chip 10 or the RF readout chip 20 RF antenna 30 is connected to the normal standby mode, characterized in that the restoration of the RF antenna of the mobile communication terminal.

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