KR101453907B1 - Slide type mobile terminal - Google Patents

Abstract

To a slide type portable terminal. The portable terminal includes an FPCB that connects a circuit board of a first body and a circuit board of a second body. The FPCB includes a first connector connected to the circuit board of the first body, and a second connector connected to the circuit board of the second body. 2 connector so that the total electrical length of the portable terminal is an odd multiple of a quarter wavelength of the operating frequency of the portable terminal. According to the present invention, it is possible to realize a portable terminal which meets the field strength according to HAC regulations.

Slide type, HAC, FPCB length

Description

[0001] Slide type mobile terminal [0002]

The present invention relates to a portable terminal, and more particularly, to a slide type portable terminal satisfying an electromagnetic field strength according to HAC regulation by implementing a total electrical length such that a current in a receiver unit is minimized using an FPCB.

A portable terminal is a portable device having one or more functions that can perform voice and video communication, input / output of information, and data storage while being portable, and occupies a large position in daily life . Therefore, the portable terminal should be designed not only for the general user but also for the hearing aid wearer.

Hearing Aid Compatibility (HAC) is a certification and evaluation item for compatibility that allows a hearing aid user wearing a hearing aid to use both the hearing aid and the handheld device without interfering with each other. The HAC is a measurement of the magnetic response of a hearing aid Methods and specifications. The magnetic field generated by the receiver of the telephone can be detected and amplified by the T-coil of the hearing aid, so that the contents of the telephone can be listened to.

The Federal Communications Commission (FCC) will apply the HAC regulation for Korean wired and wireless telecommunication products exported to the Americas and make 50% of portable terminals exported to North America a low-energy emitting product . Therefore, HAC regulation should be applied not only to folder type portable terminals but also to slide type portable terminals.

In general, since the slide type portable terminal has a strong edge current distribution, it is difficult to satisfy the electromagnetic field strength according to the HAC regulation, and therefore, there is a demand for a method capable of lowering the strength of the electromagnetic field in the receiver portion of the terminal.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a slide-type portable terminal satisfying HAC regulations by reducing the strength of an electromagnetic field generated in a receiver portion of a terminal by using an FPCB having an arbitrary length.

According to an aspect of the present invention, there is provided a portable terminal including a first body and a second body slidably coupled to the first body, wherein the circuit board of the first body and the circuit of the second body An FPCB (Flexible Printed Circuit Board) connecting a substrate; And a second connector to which the FPCB is connected to the circuit board of the first body and the FPCB is connected to at least one of the second connector to be connected to the circuit board of the second body, And a conductor portion for allowing the odd multiple to be the total electrical length.

According to the present invention, by using the FPCB used in the slide type portable terminal, the total electrical length of the terminal can be adjusted to minimize the current value in the receiver section area, thereby reducing the strength of the electromagnetic field generated in the receiver section.

Hereinafter, the present invention will be described in detail with reference to the drawings.

The portable terminal described in this specification includes a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and navigation.

FIG. 1 is a block diagram of a portable terminal according to an exemplary embodiment of the present invention. Referring to FIG. Referring to FIG. 1, a mobile terminal according to an exemplary embodiment of the present invention will be described in terms of its functional components.

1, the portable terminal 100 includes a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, A memory 160, an interface unit 170, a control unit 180, and a power supply unit 190. When such components are implemented in practical applications, two or more components may be combined into one component, or one component may be divided into two or more components as necessary.

The wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 113, a wireless Internet module 115, a short distance communication module 117, and a GPS module 119.

The broadcast receiving module 111 receives at least one of a broadcast signal and broadcast related information from an external broadcast management server through a broadcast channel. At this time, the broadcast channel may include a satellite channel, a terrestrial channel, and the like. The broadcast management server may refer to a server for generating and transmitting at least one of a broadcast signal and broadcast related information and a server for receiving at least one of the generated broadcast signal and broadcast related information and transmitting the broadcast signal to the terminal.

The broadcast-related information may mean information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal. The broadcast-related information can also be provided through a mobile communication network, in which case it can be received by the mobile communication module 113. Broadcast-related information can exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 receives broadcast signals using various broadcasting systems. In particular, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S) ), Digital Video Broadcast-Handheld (DVB-H), Integrated Services Digital Broadcast-Terrestrial (ISDB-T), and the like. In addition, the broadcast receiving module 111 may be configured to be suitable for all broadcasting systems that provide broadcasting signals, as well as the digital broadcasting system. The broadcast signal and / or the broadcast related information received through the transmission / reception module 111 may be stored in the memory 160.

The mobile communication module 113 transmits and receives a radio signal to at least one of a base station, an external terminal, and a server on a mobile communication network. Here, the wireless signal may include various types of data according to a voice call signal, a video call signal, or a text / multimedia message transmission / reception.

The wireless Internet module 115 refers to a module for wireless Internet access, and the wireless Internet module 115 can be embedded in the mobile terminal 100 or externally. The short-range communication module 117 refers to a module for short-range communication. Bluetooth, radio frequency identification (RFID), infrared data association (IrDA), ultra wideband (UWB), ZigBee, and the like can be used as the short range communication technology. A GPS (Global Position System) module 119 receives position information from a plurality of GPS satellites.

The A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 123. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. Then, the processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ The camera 121 may be equipped with two or more cameras according to the configuration of the terminal.

The microphone 123 receives an external sound signal by a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 113 and output when the voice data is in the call mode. The microphone 123 may use various noise elimination algorithms for eliminating noise generated in receiving an external sound signal.

The user input unit 130 generates key input data that the user inputs to control the operation of the terminal. The user input unit 130 may include a key pad, a dome switch, a touch pad (static / static), a jog wheel, a jog switch, a finger mouse, and the like. Particularly, when the touch pad has a mutual layer structure with the display unit 151 described later, it can be called a touch screen.

The sensing unit 140 senses the current state of the portable terminal 100 such as the open / close state of the portable terminal 100, the position of the portable terminal 100, Thereby generating a sensing signal. For example, when the portable terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. In addition, a sensing function related to whether or not the power supply unit 190 is powered on, whether the interface unit 170 is coupled to an external device, and the like can be handled.

The output unit 150 is for outputting an audio signal, a video signal, or an alarm signal. The output unit 150 may include a display unit 151, an audio output module 153, and an alarm unit 155.

The display unit 151 displays and outputs the information processed by the portable terminal 100. For example, when the portable terminal 100 is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the portable terminal 100 is in the video communication mode or the photographing mode, the photographed or received images can be displayed individually or simultaneously, and the UI and the GUI are displayed.

Meanwhile, as described above, when the display unit 151 and the touch pad have a mutual layer structure to constitute a touch screen, the display unit 151 can be used as an input device in addition to the output device. If the display unit 151 is configured as a touch screen, it may include a touch screen panel, a touch screen panel controller, and the like. In this case, the touch screen panel is a transparent panel attached to the outside, and can be connected to a bus inside the portable terminal. The touch screen panel keeps a watch on the contact result, and if there is a touch input, sends the corresponding signals to the touch screen panel controller. The touch screen panel controller processes the signals, and then transmits corresponding data to the controller 180 so that the controller 180 can determine whether the touch input has been made and which area of the touch screen has been touched.

The display unit 151 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, And a display (3D display). In addition, there may be two or more display units 151 according to the embodiment of the portable terminal 100. For example, the portable terminal 100 may include an external display unit (not shown) and an internal display unit (not shown) at the same time.

The audio output module 153 outputs audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 153 outputs sound signals related to functions performed in the portable terminal 100, for example, a call signal reception tone, a message reception tone, and the like. The sound output module 153 may include a speaker, a buzzer, and the like.

The alarm unit 155 outputs a signal for notifying the occurrence of an event of the portable terminal 100. Examples of events occurring in the portable terminal 100 include call signal reception, message reception, and key signal input. The alarm unit 155 outputs a signal for notifying the occurrence of an event in a form other than an audio signal or a video signal. For example, it is possible to output a signal in a vibration mode. When a call signal is received or a message is received, the alarm unit 155 may output a vibration to notify it. Alternatively, when the key signal is input, the alarm unit 155 can output the vibration by the feedback to the key signal input. This vibration output allows the user to recognize the occurrence of an event. Of course, a signal for notifying the occurrence of an event may also be output through the display unit 151 or the sound output module 153. [

The memory 160 may store a program for processing and controlling the control unit 180 and may store a function for temporarily storing input or output data (e.g., a phone book, a message, a still image, .

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM , And a ROM. ≪ / RTI > In addition, the portable terminal 100 may operate a web storage for storing the memory 150 on the Internet.

The interface unit 170 serves as an interface with all external devices connected to the portable terminal 100. Examples of the external device connected to the portable terminal 100 include a card socket such as a wired / wireless headset, an external charger, a wired / wireless data port, a memory card, a SIM / UIM card, / Output, Video I / O, and Earphone. The interface unit 170 receives data from the external device or receives power from the external device and transmits the data to each component in the portable terminal 100 so that data in the portable terminal 100 can be transmitted to the external device .

The controller 180 typically controls the operation of the respective units to control the overall operation of the mobile terminal 100. For example, voice communication, data communication, video communication, and the like. In addition, the control unit 180 may include a multimedia playback module 181 for multimedia playback. The multimedia playback module 181 may be configured in hardware in the controller 180 or separately from software in the controller 180. [

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

The portable terminal according to the present invention has been described in terms of components according to functions. Hereinafter, with reference to FIG. 2 and FIG. 3, the portable terminal related to the present invention will be described in more detail from the viewpoint of the components according to the external form. Hereinafter, a slider type portable terminal having a front touch screen and a slider type keypad among various types of portable terminals such as a folder type, a bar type, a swing type, a slider type, . However, the present invention is not limited to a slider type portable terminal, but can be applied to all types of portable terminals including the above-mentioned type.

2 is a perspective view of a portable terminal according to an embodiment of the present invention. Referring to FIG. 2, the portable terminal includes a first body 100A and a second body 100B configured to be slidable along at least one direction on the first body 100A.

The state where the first body 100A is disposed in a state of being overlapped with the second body 100B may be referred to as a closed configuration and the first body 100A may be referred to as a second body 100B ) May be referred to as an open configuration.

While the portable terminal 100 is closed, it mainly operates in the standby mode, but the standby mode is also canceled by the user's operation. While the portable terminal 100 is open, it operates mainly in a communication mode, but it is also switched to a standby mode by a user's operation or a predetermined period of time.

The case constituting the outer appearance of the first body 100A is formed by the first front case 100A-1 and the first rear case 100A-2. Various electronic components are embedded in the space formed by the first front case 100A-1 and the first rear case 100A-2. At least one intermediate case may be additionally disposed between the first front case 100A-1 and the first rear case 100A-2. Such cases may be formed by injection molding of a synthetic resin, or may be formed of a metal material, for example, a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 151, the first sound output module 153a, and the first camera 121a may be disposed in the first body 100A, specifically, the first front case 100A-1.

The display unit 151 includes a liquid crystal display (LCD), an OLED (Organic Light Emitting Diodes), and the like that visually express information. The touch pad may be superimposed on the display unit 151 in a layer structure so that the display unit 151 may operate as a touch screen so that information can be input by a user's touch.

The first acoustic output module 153a may be implemented in the form of a receiver or a speaker. The first camera 121a may be adapted to photograph an image or a moving image of a user or the like.

The case constituting the appearance of the second body 100B is formed by the second front case 100B-1 and the second rear case 100B-2. The first operation unit 130a may be disposed on the front face of the second body 100B, specifically, the second front case 100B-1. The second user input unit 130c, the microphone 123 and the interface unit 170 may be disposed on at least one of the first front case 100B-1 and the second rear case 100B-2.

The first user input unit 130a receives a command for controlling the operation of the portable terminal. The first user input unit 130a may include an input key having a function corresponding to a mouse function such as a joystick key, a touch pad, a track ball, a pointing stick, a finger mouse, and the like.

The first and second user input units 130a and 130c may be collectively referred to as a manipulating portion 130 and any method may be adopted if the user operates in a tactile manner with a tactile impression have. For example, the user input unit 130 may be implemented as a dome switch or a touch pad capable of receiving a command or information by a push or a touch operation of a user, or may be a wheel, a jog type, Method or the like.

In terms of functionality, the first user input 130a is for entering commands, numbers, letters, symbols, etc., such as start, end, scroll, and the like. Also, the second user input unit 130c may operate as a hot-key for activating a special function in the portable terminal.

The microphone 123 may be implemented in a form suitable for receiving voice, sound, etc. of the user. The interface unit 170 enables the portable terminal according to the present invention to exchange data with an external device. For example, the interface unit 170 may be at least one of a connection terminal for connecting to an earphone, a port for short-range communication, or power supply terminals for supplying power to the portable terminal 100, have. The interface unit 170 may be a card socket that accommodates an external card such as a user authentication module such as a subscriber identification module (SIM) or a user identity module (UIM), or a memory card for information storage.

A power supply unit 190 for supplying power to the portable terminal is mounted on the second rear case 100B-2. The power supply unit 190 may be a rechargeable battery, for example, and may be detachably coupled to the second body 100B for charging or the like.

3 is a rear perspective view of the portable terminal shown in FIG. Referring to FIG. 3, a second camera 121b may be further mounted on the rear surface of the second rear case 100B-2 of the second body 100B. The second camera 121b has a photographing direction substantially opposite to that of the first camera 121a, and may have pixels different from those of the first camera 121a.

For example, the first camera 121a has low pixels so that it is easy to capture a face of a user in the case of a video call or the like and transmit the face to the other party. The second camera 121b photographs a general object and immediately transmits It is preferable to have a high pixel.

A third user input unit 130d may be additionally mounted on the rear surface of the second rear case 100B-2 of the second body 100B. The third user input unit 130d may be implemented with a wheel, and may operate as a special function key such as a scroll in the portable terminal.

A flash 125 may be further disposed adjacent to the second camera 121b. The flash 125 illuminates the subject when the subject is photographed by the second camera 121b.

An antenna (not shown) for communication or the like may be disposed inside the second front case 100B-1 or the second rear case 100B-2.

On one side of the second rear case 100B-2, a broadcast signal receiving antenna 105 may be disposed in addition to an antenna for communication. The antenna 105 may be installed to be able to be drawn out from the second body 100B. A part of the slide module 100C that slidably connects the first body 100A and the second body 100B is disposed on the first rear case 100A-2 side of the first body 100A. The other part of the slide module 100C may be disposed on the second front case 100B-1 side of the second body 100B and may not be exposed to the outside as shown in Fig.

In addition, a fourth user input unit 130e serving as a selection or confirmation key for a specific function may be disposed on one side of the second rear case 100B-2. The fourth user input unit 130e may operate as a hot-key for activating a special function in the portable terminal.

In the above description, the second camera 121b and the like are disposed on the second body 100B, but the present invention is not limited thereto. At least one of the structures 105, 121b, and 125 described as being arranged in the second rear case 100B-2, such as the second camera 121b, is a first body 100A, 1 rear case 100A-2. In such a configuration, there is an advantage that the structures disposed in the first rear case 100A-2 in the closed state are protected by the second body 100B. Also, the first camera 121a may be rotatably formed so that the second camera 121b can be photographed up to the photographing direction, even if the second camera 121b is not separately provided.

4 is a cross-sectional view illustrating the structure of a slide type portable terminal according to an embodiment of the present invention.

4, the slide type portable terminal according to the present invention includes a main PCB (printed circuit board) 400 included in the second body 100B, an antenna (not shown) disposed at one end of the main PCB 400 405, a slide PCB 415 included in the first body 100A, an FPCB (flexible printed circuit board) 410 connecting the main PCB 400 and the slide PCB 415, And a receiver 420 disposed in the body 100A.

The main PCB 400 includes a mobile communication module 113, a user input unit 130, and a control unit 180, and processes radio signals transmitted and received from the antenna. That is, the main PCB 400 may transmit a user input signal through the antenna 405, process the signal received through the antenna 405, and transmit the processed signal to the slide PCB 415.

The antenna 405 transmits and receives signals for voice or video communication, and is disposed at one end of the main PCB 400. For example, it can be disposed at the farthest position in the handpiece of the slide type portable terminal. This is to reduce electromagnetic waves generated in the receiver. The antenna 405 may be connected to the mobile communication module 113.

The FPCB 410 is a circuit board for connecting the main PCB 400 and the slide PCB 415. The main PCB 400 and the slide PCB 415 are moved The connection between the main PCB 400 and the slide PCB 415 can be maintained independently. The FPCB 410 includes a first connector connected to the slide PCB 415, a second connector connected to the main PCB 400, and a connection portion connecting the first connector and the second connector.

The slide PCB 415 includes a display unit 151 and an acoustic output module 153 and outputs a signal transmitted from the main PCB 400 to a display unit 151 and an audio output module 153, Or audio.

The receiver 420 is connected to the audio output module 153 as a module connected to the slide PCB 415. The receiver 420 is a standard for measuring the electric field intensity in the HAC standard.

5 is a graph showing current characteristics according to wavelengths.

As shown in FIG. 5, the current has a minimum value at an odd multiplication of a quarter wavelength of the operating frequency according to the current characteristic with respect to frequency. When the maximum and minimum values of the current are set to -1 to 1, if the HAC minimum area of the electric current which forms the electric field strength satisfying the HAC standard is designated between -1 and 1, the electric field strength of the receiver 420 can be influenced The current value should be a portable terminal having an electrical length 500 that is included in the designated HAC minimum area. Here, the HAC minimum area may be changed according to the criteria set by the FCC. The electrical length refers to the distance from the antenna of the main PCB 400 to the point where the second connector of the FPCB 410 is connected, the distance of the FPCB 410, And the distance from the point where the slide PCB 415 is grounded to the end of the ground of the slide PCB 415. This will be described in detail with reference to FIG.

In addition, the electromagnetic field characteristic has a characteristic of being lowered as the electrical length becomes longer. Therefore, it is necessary to maximize the electrical length in the slide type portable terminal, and to make the electrical length to be an odd multiple of 1/4 wavelength. For example, since HAC measurement is performed in the Tx band in the PCS1900, the 1/4 wavelength is 39.9 mm when the center frequency of the Tx band is 1880 MHz. Generally, the possible length of a slide type portable terminal is 140 mm. The triple of the 1/4 wavelength of 39.9 mm is 119.7 mm, and the 5 times of the size is 199.45 mm, so that the electric length of the slide type portable terminal is required to be at least five times or more. Since the possible length of the slide type portable terminal is 140 mm, a length increase of about 60 mm is required. The present invention may be applied to a mobile terminal using a GSM850 band, a GSM900 band, or a DCS1800 band.

Since the length of the FPCB 410 is generally 60 mm, if the length of the FPCB 410 is 120 mm, the total electrical length of the slide type portable terminal can be 200 mm. Here, the length of the FPCB 410 means a length through which current can flow from one end to the other end.

6 is an embodiment for estimating the electrical length according to the present invention.

As shown in FIG. 6, the portable terminal includes a main PCB 400, an FPCB 410, and a slide PCB 415. The FPCB 410 connects the main PCB 400 and the slide PCB 415. The electrical length of the portable terminal according to one embodiment is 43.6 mm, the total length of the FPCB 410 is 81.1 mm, the distance from the antenna of the main PCB 400 to the point 600 where the second connector of the FPCB 410 is connected, And a distance of 10.9 mm from the point 605 at which the first connector of the FPCB 410 is connected to the end of the ground of the slide PCB 415 at 610. This distance is 135.5 mm. A point 600 at which the first connector of the FPCB 410 is connected and a point 605 at which the second connector of the FPCB 410 are connected is a point at which the FPCB 410 contacts the PCB, This does not overlap.

In PCS1900, the quintuple of 1/4 wavelength is 199.45 mm, so an electrical length of 135.5 mm to 63.95 mm should be added. Therefore, the total length of the FPCB 410 can be increased by 63.95 mm.

FIGS. 7 and 8 are block diagrams showing the configuration of an FPCB according to an embodiment of the present invention.

7A, a second connector connected to the slide PCB 415 is connected to a conductor 700 of a meander shape so that the total length of the FPCB 410 is 120 mm. As shown in FIG. 7 (b), a spiral-shaped conductor 705 can be connected to the first connector connected to the slide PCB 415, and as shown in FIG. 7 (c) Conductor 710 may be connected. As shown in FIG. 8A, the C-shaped conductor 800 serves as a first connector to be connected to the slide PCB 415, and at the same time, serves as a conductor having an electrical length increased to 120 mm in total have. 8 (b), a conductor 805 folded to overlap with the first connector is connected to the first connector connected to the slide PCB 415, so that when the slide type portable terminal is opened, That is, the folded conductor 805 may be unfolded so as not to overlap with the first connector, and when the slide type portable terminal is closed, the extended conductor 805 may be overlapped with the first connector. Here, the conductor may be connected to a first connector connected to the main PCB 400, a first connector connected to the slide PCB 415, and a second connector connected to the main PCB 400. However, the total length of the FPCB 410 should be 120 mm.

In addition, the portable terminal according to the present invention is not limited to the configuration and method of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments may be selectively And may be configured in combination.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

1 is a block diagram of a portable terminal according to an embodiment of the present invention;

FIG. 2 is a perspective view of a mobile terminal according to an exemplary embodiment of the present invention,

FIG. 3 is a rear perspective view of the portable terminal shown in FIG. 2,

FIG. 4 is a sectional view showing the construction of a slide type portable terminal according to an embodiment of the present invention,

5 is a graph showing current characteristics according to wavelengths,

Figure 6 is an embodiment for estimating the electrical length according to the present invention,

FIGS. 7 and 8 are block diagrams showing the configuration of an FPCB according to an embodiment of the present invention.

Claims (8)

A portable terminal including a first body and a second body slidingly coupled to the first body, A hydration section disposed in the first body; An antenna disposed at one end of the circuit board of the second body; A flexible printed circuit board (FPCB) having a first connector connected to the circuit board of the first body, a second connector connected to the circuit board of the second body, and a connection part connecting the first connector and the second connector, ); And Wherein the length of the FPCB from the antenna to the second connector, the length of the FPCB, and the length from the first connector to the circuit board ground end of the first body are connected to at least one of the first connector and the second connector, And a conductor unit for reducing the strength of an electromagnetic field generated in the receiver unit by making the total electrical length of the receiver unit equal to an odd multiple of a quarter wavelength of the operating frequency. The method according to claim 1, Wherein the operating frequency is a center frequency of a transmission band of the PCS1900. The method according to claim 1, Wherein the total electrical length is at least five times the quarter wavelength of the operating frequency. The method according to claim 1, Wherein the conductor is folded to overlap the connector when the second body is in a closed state and is folded so as not to overlap with the connector when the second body is in an open state. The method according to claim 1, Wherein the conductor portion has a meander shape. The method according to claim 1, Wherein the conductor portion has a stepped shape. The method according to claim 1, Wherein the conductor portion is in the form of a spiral. The method according to claim 1, Wherein the conductor portion is in a 'C' shape.

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