KR101513630B1 - Multi-band antenna and portable terminal having the same - Google Patents

Abstract

The present invention relates to a semiconductor device comprising a carrier formed of a dielectric material, a radiator mounted on the carrier and having conductive branches forming different paths, and an electromagnetic wave propagating through the radiator, And a change unit for changing a permittivity of the carrier at the time of transmission and reception of the multi-band antenna, and a mobile terminal including the multiband antenna.

Description

TECHNICAL FIELD [0001] The present invention relates to a multi-band antenna and a mobile terminal including the multi-

The present invention relates to a portable terminal having an antenna for transmitting and receiving frequencies in a plurality of bands.

A portable terminal is a portable electronic apparatus which is portable and has one or more functions of voice and video call function, information input / output function, and data storing function.

As the functions of the portable terminal are diversified, the portable terminal is implemented in the form of a multimedia device having complicated functions such as photographing and photographing of a moving picture, reproduction of music or video file, reception of a game, and reception of a broadcast.

In order to implement complex functions in multimedia devices, various new attempts have been made in terms of hardware or software. In an embodiment, a user interface environment is provided for a user to easily and conveniently search for or select a function.

In addition to the above-mentioned attempts, consideration can also be given to the radio frequency transmission / reception function, which is a basic characteristic of the portable terminal.

It is an object of the present invention to provide a portable terminal having a multi-band antenna of a conventional type.

Another object of the present invention is to improve the frequency transmission / reception characteristics in the above multi-band.

A multi-band antenna according to an embodiment of the present invention for realizing the above-mentioned problems includes a carrier, a radiator, and a changing portion. The carrier is formed of a dielectric material. The radiator is mounted to the carrier with conductive branches forming different paths. The changing portion is formed to correspond to a portion where the branches are adjacent to each other of the carriers so that the dielectric constant of the dielectric material forming the carrier is changed when transmitting and receiving electromagnetic waves through the radiator. The adjacent portion may be an area between adjacent ends of the branches, or an area corresponding to a branch point of the branches.

According to an aspect of the present invention, the changing portion may be formed such that a portion of the carrier is cut-out.

According to another aspect of the present invention, the branches include first branches extending in opposite directions about a feeding portion and covering a first band, and first branch portions branched from a first portion of the first branches, Lt; RTI ID = 0.0 > a < / RTI > second branch. At least one of the branches may be formed with a stepped portion rather than an adjacent portion.

A portable terminal according to another embodiment of the present invention includes the upper multi-band antenna, a controller, and a user interface. The control unit is electrically connected to the antenna and the user interface to control their operation. The user interface may be an input or an output related to electromagnetic waves transmitted and received by the antenna, and may be, for example, a microphone, a display unit, or the like.

The portable terminal according to the present invention configured as described above is configured such that the electromagnetic wave transmission and reception characteristics of the radiator mounted on the carrier which is a dielectric material and operating in a plurality of bands by the plurality of branches are changed by the changing unit formed on the carrier Accordingly, the electromagnetic wave transmission and reception characteristics of an antenna operating in a multi-band are improved.

Hereinafter, a portable terminal related to the present invention will be described in detail with reference to the drawings. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations.

1 is a perspective view of a portable terminal according to an embodiment of the present invention.

The portable terminal of the present invention includes a first body 110 and a second body 120 that is slidable along at least one direction on the first body 110. However, the present invention is not limited to the disclosed embodiments, and can be applied to various types of portable terminals such as a bar type, a folder type, a swing type, and a swivel type.

The first body 110 may be referred to as a closed configuration in which the first body 110 and the second body 120 are overlapped with each other and the first body 110 may be referred to as a second body 120 ) May be referred to as an open configuration.

The portable terminal operates mainly in the standby mode in the closed state, but the standby mode is also released by the operation of the user. In addition, the portable terminal operates mainly in a communication mode in an open state, but may be switched to a standby mode by a user's operation or a predetermined period of time.

A casing (a casing, a housing, a cover, etc.) constituting an outer appearance of the first body 110 is formed by a front case 111 and a rear case 112. Various electronic components are installed in the space formed by the front case 111 and the rear case 112. At least one intermediate case may be additionally disposed between the front case 111 and the rear case 112. The cases may be formed by injection molding of a synthetic resin or may be formed of a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 113, the sound output unit 114, the first image input unit 115, or the first operation unit 116 may be disposed in the first body 110, specifically, the front case 111. [

The display unit 113 includes an LCD (Liquid Crystal Display) module, an OLED (Organic Light Emitting Diode) module, and a TOLED (Transparent OLED) module for visually expressing information.

The display unit 113 may further include a touch screen to enable information input by a user's touch. In addition, the display unit 113 may be configured to generate various tactile effects that a user can feel at the time of touch. This can be realized by a haptic module interlocked with the display unit 113. [ A typical example of a haptic effect generated by a haptic module is vibration. The haptic module may be variously arranged according to the configuration of the portable terminal as well as the display unit 113. [

The sound output unit 114 may be implemented in the form of a receiver or a speaker.

The first image input unit 115 may be implemented as a camera module for capturing an image or a moving image of a user.

The first operation unit 116 receives a command for controlling the operation of the portable terminal according to an exemplary embodiment of the present invention.

The front case 121 and the rear case 122 may form the case of the second body 120, as in the case of the first body 110. [

The second operation unit 123 may be disposed on the front surface of the second body 120, specifically, the front case 121.

The third operation unit 124, the first sound input unit 125, and the interface 126 may be disposed in at least one of the front case 121 and the rear case 122. [

The first to third operating portions 116, 123, and 124 may be collectively referred to as a manipulating portion and may be employed in any manner as long as the user operates in a tactile manner.

For example, the operation unit may be implemented as a dome switch or a touch screen or a touch pad capable of receiving commands or information by a push or touch operation of a user, or may be a wheel, a jog type, a joystick, Or the like.

In terms of functions, the first operation unit 116 is for inputting commands such as start, end, and scrolling, and the second operation unit 123 is for inputting numbers, characters, symbols, and the like. Also, the third operation unit 124 may operate as a hot-key for performing a special function such as activation of the first image input unit 115 or the like.

The first sound input unit 125 may be implemented in the form of a microphone, for example, to receive a user's voice, other sounds, and the like.

The interface 126 allows the portable terminal related to the present invention to exchange data with an external device. For example, the interface 126 may be a wired or wireless connection terminal for connecting to an earphone, a port for short range communication (for example, an IrDA port, a Bluetooth port, a wireless LAN port a wireless Lan port), or power supply terminals for supplying power to the portable terminal.

The interface 126 may be a card socket that accepts an external card such as a subscriber identification module (SIM) or a user identity module (UIM), a memory card for information storage, and the like.

A power supply 127 for supplying power to the portable terminal is mounted on the rear case 122 side. The power supply 127 may be detachably coupled to a rechargeable battery for charging, for example.

2 is a rear perspective view of the portable terminal of FIG.

Referring to FIG. 2, a second image input unit 128 may be additionally mounted on the rear surface of the rear case 122 of the second body 120. The second image input unit 128 may have a photographing direction substantially opposite to that of the first image input unit 115 (see FIG. 1), and may be a camera having different pixels from the first image input unit.

For example, the first image input unit 115 has low pixels so that the face of the user can be photographed and transmitted to the other party in case of a video call or the like, and the second image input unit 128 photographs a general object, It is preferable to have a high pixel because it is often not transmitted.

A flash 129 and a mirror 130 are further disposed adjacent to the second image input unit 128. The flash 129 illuminates the subject when the subject is photographed by the second image input unit 128. The mirror unit 130 allows the user to illuminate the user's own face or the like when the user intends to take a picture of himself / herself (self-photographing) using the second image input unit 128.

And the second sound output unit 131 may be further disposed in the rear case 122. [

The second sound output unit 131 may implement a stereo function together with the first sound output unit 114 (see FIG. 1), and may be used for talking in a speakerphone mode.

On one side of the rear case 122, a broadcast signal receiving antenna 132 may be arranged in addition to an antenna for communication. The antenna 132 may be installed to be able to be drawn out from the second body 120.

A part of the slide module 133 which slidably couples the first body 110 and the second body 120 is disposed on the rear case 112 side of the first body 110.

The other part of the slide module 133 may be disposed on the front case 121 side of the second body 120 and may not be exposed to the outside as in this figure.

In the above description, the second image input unit 128 and the like are disposed in the second body 120, but the present invention is not limited thereto. For example, at least one of the configurations 128 to 132 described as being arranged in the rear case 122, such as the second image input unit 128, is connected to the first body 110, mainly the rear case 112 It is also possible to mount it. In such a case, there is an advantage that the configuration (s) arranged in the rear case 112 in the closed state is protected by the second body 120. In addition, the first image input unit 115 may be rotatably formed so that the second image input unit 128 can be photographed up to the second image input unit 128 even if the second image input unit 128 is not separately provided.

3 is an exploded perspective view showing the inside of the second body 120 of FIG.

Referring to this figure, a circuit board 140 is mounted on the inner surface of the front case 121. The display unit 113 and the first operation unit 116 are electrically connected to the circuit board 140. The circuit board 140 may be functionally referred to as a control unit 170 (see Fig. 7) for controlling the display unit 113 and the like.

The antenna 200 is mounted on the inner surface of the rear case 122 coupled to the front case 121. The antenna 200 occupies a certain volume, and the relationship with other parts is taken into consideration and a suitable position is determined.

A pair of terminals 211 and 212 are formed on one surface of the antenna 200 facing the circuit board 140. Among them, the power feeding terminal 212 is brought into contact with the power feeding terminal 141 formed on the circuit board 140 so as to have a position corresponding thereto. The ground terminal 212 is also brought into contact with the ground terminal 142 formed on the circuit board 140.

FIG. 4 is a perspective view of the antenna 200 of FIG. 3, and FIG. 5 is an exploded perspective view of FIG.

Referring to these figures, the antenna 200 includes a carrier 210 and a radiator 220.

The carrier 210 is formed of a dielectric material, and has a shape in which a portion is opened. This is to ensure that the carrier 210 does not take up much space or weight while having the surface area required for the radiator 220 to be mounted as a whole.

A conductive radiator 220 is mounted on the surface of the carrier 210. The radiator 220 may be in the form of a metal plate. The radiator 220 has a plurality of branches 213 and 214 that form different conductive paths.

The first branch 213, which is one of the branches 213 and 214, is formed of a plurality of branches 213a and 213b. Specifically, the branches 213a and 213b extend in directions opposite to each other with respect to the power supply terminal 211 as a center. The branches 213a and 213b complement each other's characteristics with respect to radio wave radiation so that frequency transmission and reception of the first band can be performed more smoothly.

Branching at a portion of the first branch 213 extends the second branch 214. [ The second branch 214 is also arranged to pass through the side adjacent to the side on which the first branch 213 is disposed. A portion of the second branch 214 extends in a stepped shape relative to the adjacent portion, corresponding to a recess formed in the surface of the carrier 210. [

The second branch 214 has a longer length than the first branch 213. Due to this length, the second branch 214 transmits and receives frequencies in the lower band, i.e., the second band, than the first band in which the first branch 213 is transmitting and receiving. If the first band is DCS1800, PCS1900, WCDMA1900, WCDMA2100, etc., the second band may be GSM850, EGSM900, WCDMA850, and the like.

The change portion 230 is formed in at least one portion of the carrier 210 corresponding to the portion where the first and second branches 213 and 214 are adjacent to each other. The changing unit 230 is formed so that the permittivity of the dielectric material forming the carrier 210 is changed when the antenna 200 is operated.

The upper adjacent region may be the region between the adjacent ends of the branches 213 and 214. In the figures, the space between the left branch 213a and the second branch 214 of the first branch 213 corresponds to the upper region. A cut-out portion 232 is formed in a portion of the carrier 210 corresponding to the region between the upper portions. This portion 232 may be one of the changing portions 230.

Another cut-out portion 231 constituting the changing portion 230 is formed at a portion corresponding to a region where the right branch 213b and the second branch 214 of the first branch 213 are branched.

  As described above, the regions where the end portions of the branches are adjacent to each other or the regions where the ends are branched from each other are the points where the radiation patterns of the electromagnetic waves cross each other. By forming the cut-out portions 231 and 232 as the changing portion 230 with respect to such a point, a minute change of the dielectric constant appears at this point where the current flows most strongly. This change in the dielectric constant affects the performance of the overall antenna 200.

These effects can be confirmed by the following experiment. Table 1 shows electromagnetic wave radiation characteristics in four bands in a state where the change unit 230 is not formed in the carrier 210. Table 2 shows characteristics in a state where the change unit 230 is formed .

GSM  850 PCS  1900 Primary Secondary Third Average Primary Secondary Third Average TRP 28.8 28.02 28.11 28.31 26.72 26.65 26.9 26.76 TIS -105.6 -105.8 -105.53 -105.64 -104.42 -103.81 -104.08 -104.10 GSM  900 DCS  1800 Primary Secondary Third Average Primary Secondary Third Average TRP 29.31 29.14 27.65 28.70 22.98 25.26 26.88 25.04 TIS -103 -102 -100 -101.67 -104.7 -104.2 -104.86 -104.59

GSM  850 PCS  1900 Primary Secondary Third Average Primary Secondary Third Average TRP 29.1 29.02 29.11 29.08 27.52 27.35 27.9 27.59 TIS -105.6 -105.8 -105.53 -105.64 -104.92 -104.91 -104.98 -104.94 GSM  900 DCS  1800 Primary Secondary Third Average Primary Secondary Third Average TRP 29.71 30.04 28.34 29.36 25.08 25.96 27.88 26.31 TIS -104.5 -103.8 -103 -103.77 -104.7 -104.2 -104.86 -104.59

In the GSM 850 band, the average value of TRP before formation of the changing unit 230 is 28.31. After the modification unit 230 is formed, the average value is increased by 0.77 by 29.08. TIS has the same mean value.

In the PCS 1900 band, the TRP is improved from 26.76 to 27.59 by the changing unit 230. TIS is also improved from -104.10 to -104.94.

6 is a graph showing the value of the reflection coefficient for frequency.

The first to eighth parts shown in this experiment correspond to the frequencies 824, 894, 960, 1710, 1850, 1990, 1920 and 2170 MHz, respectively.

It can be seen that the graph A after formation has a wider bandwidth than the graph B before the modification part 230 in the third frequency part or the fifth to eighth frequency parts.

Also, since the bottom point of the reflection coefficient is closer to 1, it can be seen that the reflectivity of the antenna is also higher.

7 is a block diagram of a portable terminal according to the present invention.

7, the portable terminal according to an exemplary embodiment of the present invention includes a wireless communication module 161, operation units 116, 123 and 124, image input units 115 and 128, an acoustic input unit 125, a display unit 113, A sensing unit 166, an interface 126, a broadcast receiving module 165, a memory 164, a power supply unit 127, and a control unit 170. [

The control unit 170 typically controls the overall operation of the portable terminal. For example, voice communication, data communication, video communication, and the like.

In addition to the normal function control, the control unit 170 further controls the operation of the portable terminal related to the present invention.

The wireless communication module 161 transmits / receives a wireless signal to / from a mobile communication base station through an antenna. A transmission unit 162 for transmitting and receiving voice data, character data, video data, and control data under the control of the control unit 170 and for modulating and transmitting a signal to be transmitted for this purpose; 163).

The operation units 116, 123, and 124 are configured as shown in FIG. 1, and provide the control unit 170 with key input data that the user inputs for controlling the operation of the terminal. The operation units 116, 123, and 124 include a dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

The image input units 115 and 128 process image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame is converted into image data that can be displayed on the display unit 113 and output to the display unit 113.

The image frames processed by the image input units 115 and 128 are stored in the memory 164 under the control of the control unit 170 or transmitted to the outside through the wireless transmission /

The sound input unit 125 receives an external sound signal by a microphone in a communication mode, a recording mode, a voice recognition mode, and the like, and processes it as electrical voice data. The processed voice data is converted into a form that can be transmitted to the mobile communication base station through the wireless communication module 161 in the communication mode, and is output to the wireless communication module. In the record mode, processed voice data is output to be stored in the memory 164.

The sound input unit 125 may be implemented with various noise reduction algorithms for eliminating noise generated in the process of receiving an external sound signal.

The display unit 113 displays and outputs information processed in the portable terminal. For example, when the portable terminal is in the call mode, the control unit 170 displays a UI (User Interface) or GUI (Graphic User Interface) related to the call. When the portable terminal is in the video communication mode or the photographing mode, the control unit 170 displays and displays the photographed image, the UI, and the GUI. When the display unit 113 includes a touch screen, the display unit 113 is used as an input device in addition to the output device.

The sound output units 114 and 131 receive sound data received from the wireless communication module 161 under the control of the control unit 170 in the call signal reception mode, the communication mode or the recording mode, the voice recognition mode, Converts the stored sound data and outputs it to the outside.

In addition, the sound output units 114 and 131 output sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the portable terminal. The sound output units 114 and 131 include a speaker, a receiver, a buzzer, and the like.

The sensing unit 166 senses the current state of the portable terminal, such as the opening / closing state of the portable terminal, the position of the portable terminal, whether or not the user touches the portable terminal, and generates a sensing signal for controlling the operation of the portable terminal. For example, if the portable terminal is in the form of a slide phone, it senses whether the slide phone is opened or closed, and outputs the sensing result to the controller 170 to control the operation of the terminal. And a sensing function related to whether or not the power supply 127 is powered on, whether the interface 126 is coupled to an external device, and the like.

The interface 126 may be any type of interface card such as a wired / wireless headset, an external charger, a wired / wireless data port, a card socket (e.g. a memory card, a SIM / UIM card) It serves as an interface with the device. The interface 126 receives data from an external device or receives power from the external device, transfers the data to each component in the portable terminal, or transmits data in the portable terminal to an external device.

The memory 164 may store a program for processing and controlling the control unit 170 and may have a function for temporarily storing input / output data (e.g., a phone book, a message, a still image, .

In the memory 164, a program for controlling the operation of the portable terminal related to the present invention is stored

Such memory 164 includes the concept of a generally known hard disk, a card type memory (e.g., SD or XD memory), flash memory, RAM, ROM, and the like.

The broadcast receiving module 165 receives broadcast signals transmitted through satellite or terrestrial waves and converts the received broadcast signals into broadcast data formats that can be output to the sound output units 114 and 131 and the display unit 113 and outputs them to the controller 170. Further, the broadcast receiving module 165 receives additional data (e.g., EPG (Electric Program Guide), channel list, etc.) related to broadcasting. The broadcast data and the additional data converted by the broadcast receiving module 165 may be stored in the memory 164.

The power supply unit 127 receives external power and internal power under the control of the controller 170 and supplies power required for operation of the respective components.

The above-described portable terminal is not limited to the configuration and method of the embodiments described above, but all or some of the embodiments may be selectively combined so that various modifications may be made to the embodiments.

1 is a perspective view of a mobile terminal according to an embodiment of the present invention;

2 is a rear perspective view of the portable terminal of FIG. 1;

3 is an exploded perspective view showing the interior of the second body of FIG. 1;

Figure 4 is a perspective view of the antenna of Figure 3;

5 is an exploded perspective view of Fig.

Figure 6 is a graph showing the value of the reflection coefficient for frequency.

7 is a block diagram of a mobile terminal according to the present invention.

Claims (6)

A carrier formed of a dielectric material; A radiator mounted on the carrier and having conductive branches forming different paths; And And a changing portion formed corresponding to a portion adjacent to the branches of the carrier to change a permittivity of the carrier at the time of transmission and reception of an electromagnetic wave through the radiator, The adjacent portion being an area between adjacent ends of the branches, or an area corresponding to a point where the branches branch, At least a portion of the radiator being disposed on one side of the carrier, Wherein the changing portion is provided by cutting-out a part of the one side portion of the carrier corresponding to the adjacent portion. delete delete The method according to claim 1, The first branches extending in opposite directions about the feeding portion, the first branches transmitting and receiving a frequency of the first band; And a second branch that branches from a portion of the first branches and is formed longer than the first branches and that transmits and receives a frequency of a second band. 5. The method of claim 4, Wherein at least one of the branches comprises a stepped portion than an adjacent portion. A multi-band antenna according to any one of claims 1, 4, and 5; A control unit electrically connected to the antenna and controlling transmission and reception of electromagnetic waves through the antenna; And And a user interface coupled to the controller to allow input or output associated with the electromagnetic wave.

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