KR20140123813A - Antenna module and mobile terminal having the same - Google Patents

Abstract

An antenna module according to an embodiment of the present invention comprises: a first member and a second member which are acted as radiators of an antenna to transmit/receive radio signals; a first feeding unit to feed the first member and the second member; and a transmission line to connect the feeding unit and the second member so that the second member forms an electric field when the first member forms an electric field within a near field.

Description

TECHNICAL FIELD [0001] The present invention relates to an antenna module and a mobile terminal including the antenna module.

Embodiments of the present invention relate to a mobile terminal having an antenna module for transmitting and receiving radio signals.

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

Various new attempts have been made in terms of hardware or software to implement the complex functions of multimedia devices. For example, a user interface environment is provided for a user to easily and conveniently search for or select a function.

In addition to the above attempts, it may be considered to further improve the functions of the hardware and the like. These improvements include structural changes and improvements for the user to use the mobile terminal more conveniently. It can be considered for an antenna that transmits and receives radio waves in one of the above structural changes and improvements.

An antenna is a device that is formed to transmit and receive wireless electromagnetic waves for wireless communication, and is an essential component required for a mobile terminal. Since the mobile terminal tends to implement various functions such as a WiBro and a DMB in addition to a voice call, the antenna must be designed to be small enough to be embedded in a mobile terminal as well as to implement bandwidths satisfying the functions.

In accordance with the above requirements, antennas capable of implementing multi-frequency bands are being designed. However, there is a problem in that the structure of the antenna is complex, and it is difficult to independently adjust parameter values that determine characteristics such as resonance frequency, bandwidth, gain, and the like.

In addition, the performance of the antenna is deteriorated due to the interaction in the antenna module that provides MIMO or diversity.

Therefore, in order to solve these problems, an antenna having a new structure can be considered.

It is an object of the present invention to provide a mobile terminal having an antenna module with improved performance.

It is another object of the present invention to provide an antenna module that has a more advanced structure and can more efficiently perform mobile communication services such as MIMO and diversity.

According to an aspect of the present invention, there is provided an antenna module including: a first member and a second member, each of which is a radiator of an antenna for transmitting / receiving a radio signal; A first feeder for feeding the first member and the second member; And a transmission line connecting the feed member and the second member such that when the first member forms a magnetic field within the near field, the second member forms an electric field.

According to an example of the present invention, the first and second members may operate as a radiator of a dipole antenna.

According to an example of the present invention, a third member disposed between the first and second members; And a second feeding part for feeding the third member.

According to one example of the present invention, the first and second members resonate at a first frequency, and the third member resonates at a second frequency higher than the first frequency.

According to an embodiment of the present invention, the first and second members may further include a shielding part formed between the feeding part and the members so as to prevent resonance at a harmonic frequency.

According to an example of the present invention, the third member may be formed to resonate in a frequency band in which the blocking portion blocks.

According to an example of the present invention, the first member to the third member may be formed on one carrier formed to have a certain dielectric constant.

According to an example of the present invention, the resonator may further include a resonator formed between the third member and the second feeder such that the third member further resonates at a third frequency adjacent to the second frequency.

According to an example of the present invention, the resonator unit may include a shunt capacitor that forms the third frequency together with the third member.

According to an embodiment of the present invention, a matching portion for matching an impedance between the first member and the first feeding portion or between the second member and the first feeding portion is formed, and the matching portion includes at least one lattice constant Device.

According to one example related to the present invention, a T matching portion including three inductors connected to each other at a branching point may be connected to at least one of the members so as to enhance the magnetic field in the near field.

According to another aspect of the present invention, there is provided a mobile terminal comprising: a terminal body; And an antenna module built in the body, the antenna module being configured to operate at a first frequency and a second frequency, the antenna module comprising: first and second antennas that are powered by the first feeder to resonate at the first frequency; member; And a third member disposed between the members and being configured to transmit and receive a radio signal at the second frequency that is higher than the first frequency by being fed by a second feeder to operate independently, .

According to an embodiment of the present invention, a matching portion for matching an impedance between the first member and the first feeding portion or between the second member and the first feeding portion is formed, and the matching portion includes at least one lattice constant Device.

According to one example related to the present invention, the antenna module is configured such that, when the first member forms a magnetic field in a near field, the antenna member includes the feed member and the second member And may further include a transmission line for connection.

According to an example of the present invention, the antenna module includes a first antenna element connected to the first or second member and having three inductors connected to each other at a branching point so as to enhance the magnetic field in the near field, And may further include a matching unit.

According to an example of the present invention, the antenna module further includes a blocking portion formed to block the first and second members from resonating at a harmonic frequency, and the second frequency is blocked by the blocking portion May be included in the frequency band.

According to an example of the present invention, the first and second members may operate as a radiator of a dipole antenna.

According to an example of the present invention, the antenna module further includes a resonance part formed between the third member and the second feed part so that the third member further resonates at a third frequency adjacent to the second frequency .

According to an example of the present invention, the resonance unit may include a shunt capacitor that forms the third frequency together with the third member.

According to an example of the present invention, the first member to the second member may be formed on one carrier formed to have a certain permittivity.

According to an example of the present invention, the carrier may be formed to have a constant width so as to contact both side surfaces of the terminal body.

According to an example of the present invention, a circuit board may be disposed under the carrier, and the third member may be formed on the circuit board.

According to one example of the present invention, the first and second members are connected to a first communication chip formed on the circuit board, and the third member is connected to a second communication chip formed on the circuit board .

The mobile terminal according to at least one embodiment of the present invention configured as described above can realize a more efficient antenna in a small space and can maintain the performance of the antenna, thereby making the mobile terminal more compact.

Also, the antenna module can form more than two antenna devices in a single antenna module, and each antenna device can exhibit antenna performance over a certain level.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention;
2 is a front perspective view of a mobile terminal according to an embodiment of the present invention;
3 is a rear perspective view of the mobile terminal of FIG. 2;
FIG. 4 is an exploded perspective view of FIG. 3; FIG.
5 is a perspective view of an antenna module according to a comparative example;
6 is a view showing reflection coefficients according to frequencies in the antenna module shown in Fig. 5; Fig.
7 is a perspective view of an antenna module according to an embodiment of the present invention;
8A is a conceptual view of the antenna module shown in FIG.
8B is a conceptual diagram showing an example in which a magnetic field and an electric field are mutually influenced in a near field.
8C is a conceptual diagram showing an example of a matching unit.
FIG. 9A shows reflection coefficients according to the frequency of the first antenna; FIG.
Fig. 9B shows the radiation efficiency according to the frequency of the first antenna. Fig.
9C is a diagram showing reflection coefficients according to frequencies in the antenna module shown in Fig. 7; Fig.
FIG. 9D shows a variation of the radiation space according to the hand effect; FIG.
Figs. 10A and 10B are diagrams showing a comparison example of the second antenna device and reflection coefficients according to frequency, respectively. Fig.
11A to 11B are diagrams showing an embodiment of a second antenna device and reflection coefficients according to frequency, respectively.
12A to 12B are diagrams showing another embodiment of the second antenna device and reflection coefficients according to frequency, respectively.
13 is a view showing an example of a configuration of an antenna module and a circuit board when mounted on a mobile terminal;
14 is a view showing another example of the configuration of an antenna module and a circuit board when mounted on a mobile terminal;

Hereinafter, an antenna module and a mobile terminal including the antenna module according to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

The mobile terminal described in this specification may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), navigation and the like. However, the technical idea described in this specification can be applied to fixed terminals such as a digital TV, a desktop computer and the like.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.

The mobile terminal 100 includes a wireless communication unit 110, an audio / video input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, A controller 170, a controller 180, a power supply 190, and the like. The components shown in FIG. 1 are not essential, and a mobile terminal having more or fewer components may be implemented. Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. 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 may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast-related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast-related information may 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).

For example, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only Broadcast-Handheld (ISDB-T), Integrated Services Digital Broadcast-Terrestrial (ISDB-T), and the like. Of course, the broadcast receiving module 111 may be adapted to other broadcasting systems as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) and the like can be used as wireless Internet technologies.

The short-range communication module 114 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 a short range communication technology.

The position information module 115 is a module for obtaining the position of the mobile terminal, and a representative example thereof is a Global Position System (GPS) module.

Referring to FIG. 1, an 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 122. The camera 121 processes an image frame such as a still image or moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the base portion 265 (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. [ Two or more cameras 121 may be provided depending on the use environment.

The microphone 122 receives an external sound signal through 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 112 when the voice data is in the call mode, and output. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

The sensing unit 140 senses the current state of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence or absence of user contact, the orientation of the mobile terminal, And generates a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. It is also possible to sense whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like. Meanwhile, the sensing unit 140 may include a proximity sensor 141.

The output unit 150 is for generating output related to the visual, auditory or tactile sense and includes a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154 .

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

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display display, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another or may be disposed integrally with each other, or may be disposed on different surfaces.

(Hereinafter, referred to as a 'touch screen') in which a display unit 151 and a sensor for sensing a touch operation (hereinafter, referred to as 'touch sensor') form a mutual layer structure, It can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display unit 151 or a capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like.

Referring to FIG. 1, a proximity sensor 141 may be disposed in an inner region of the mobile terminal or in the vicinity of the touch screen, which is surrounded by the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or a nearby object without mechanical contact using the force of an electromagnetic field or infrared rays. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of recognizing that the pointer is positioned on the touch screen while the pointer is not in contact with the touch screen is referred to as "proximity touch & The act of actually touching the pointer on the screen is called "contact touch. &Quot; The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The audio output module 152 may output 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 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events that occur in the mobile terminal include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the audio output module 152 so that they may be classified as a part of the alarm unit 153.

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 154 may include a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of the air through the injection port or the suction port, a touch on the skin surface, contact of an electrode, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 154 can be implemented not only to transmit the tactile effect through the direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. The haptic module 154 may include two or more haptic modules 154 according to the configuration of the portable terminal 100.

The memory 160 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 160 may store data on vibration and sound of various patterns outputted when a touch is input on the touch screen.

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 (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the external device. For example, a port for connecting a device with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, an identification module, an audio I / A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module A Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

When the mobile terminal 100 is connected to an external cradle, the interface unit 170 may be a path through which power from the cradle is supplied to the mobile terminal 100, or various commands A signal may be a path through which the signal is transmitted to the mobile terminal. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [

The controller 180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

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 various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of a processor, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, The embodiments described may be implemented by the control unit 180 itself.

According to a software implementation, embodiments such as the procedures and functions described herein may be implemented with separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code can be implemented in a software application written in a suitable programming language. The software code is stored in the memory 160 and can be executed by the control unit 180. [

FIG. 2 is a perspective view of a mobile terminal according to an embodiment of the present invention, and FIG. 3 is a rear perspective view of the mobile terminal shown in FIG. 2. Referring to FIG.

Referring to FIGS. 2 and 3, the mobile terminal 200 includes a bar-shaped terminal body 204. However, the present invention is not limited thereto, and can be applied to various structures such as a slide type, a folder type, and a swing type in which two or more bodies are coupled to be movable relative to each other. Further, the mobile terminal described herein may be any portable electronic device having a camera and flash, such as a mobile phone, a smart phone, a notebook computer, a digital broadcast terminal, a Personal Digital Assistants ), A PMO (Portable Multimedia Player), and the like.

The mobile terminal (200) according to the present invention includes a terminal body (204) constituting its appearance.

The casing (casing, housing, cover, etc.) constituting the external appearance of the terminal body 204 is formed by the front case 201, the rear case 202, and the battery case 203. The battery case 203 is formed so as to cover the rear surface of the rear case 202.

Various electronic components are embedded in the space formed between the front case 201 and the rear case 202. The cases may be formed by injection molding a synthetic resin, or may be formed to have a metal material such as stainless steel (STS) or titanium (Ti) or the like.

The display unit 210 includes a display unit 210, a first sound output unit 211, a front camera unit 216, a side key 214, an interface unit 215, and a signal input unit 217 .

The display unit 210 includes an LCD (Liquid Crystal Display) module, an OLED (Organic Light Emitting Diodes) module, and an e-paper for visually expressing information. The display unit 210 may include touch sensing means for inputting data by a touch method. Hereinafter, the display unit 210 including the touch sensing unit will be referred to as a 'touch screen'. If any one of the touches on the touch screen 210 is touched, the contents corresponding to the touched position are input. The content input by the touch method may be a letter or a number, an instruction in various modes, a menu item which can be designated, and the like. The touch sensing means is formed in a translucent manner so that the display portion can be seen, and a structure for enhancing the visibility of the touch screen in a bright place may be included. Referring to FIG. 2, the touch screen 210 occupies most of the front surface of the front case 201.

The first sound output unit 211 may be implemented as a receiver for delivering a call sound to a user's ear or a loud speaker for outputting various alarm sounds or multimedia playback sounds.

The front camera unit 216 processes an image frame such as a still image or a moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 210. [

The image frame processed by the front camera 216 can be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ The front camera 216 may be provided in two or more depending on the use environment.

The signal input unit 217 is operated to receive a command for controlling the operation of the mobile terminal 200 and may include a plurality of input keys. The input keys may also be referred to as a manipulating portion and may be employed in any manner as long as the user has a tactile sense and operates in a tactile manner.

For example, a dome switch or touch screen capable of receiving a command or information by a push or touch operation of a user, a touch pad, or a wheel, a jog type or a joystick for rotating a key . The contents input by the signal input unit 217 can be variously set. For example, to enter start, end, scroll, and the like.

A side key 214, an interface 215, and an acoustic input unit 213 are disposed on the side surface of the front case 201.

The side key 214 may be collectively referred to as an operation unit, and a command for controlling the operation of the mobile terminal 200 may be input. The side key 214 may be employed in any manner as long as the user is operating in a tactile manner with a tactile impression. The content input by the side key 214 can be variously set. For example, by the side key 214, it is possible to control the image input units 216 and 221, adjust the size of the sound output from the sound output unit 211, or switch the display unit 210 to the touch recognition mode Command can be input.

The sound input unit 213 may be implemented, for example, in the form of a microphone to receive a user's voice, other sounds, and the like.

The interface unit 215 is a channel through which the mobile terminal 200 related to the present invention can exchange data with an external device. For example, the interface unit 215 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 the like, or power supply terminals for supplying power to the mobile terminal 200. The interface unit 215 may be implemented as a socket for receiving an external card such as a SIM (Subscriber Identification Module) or a UIM (User Identity Module) or a memory card for storing information.

A power supply unit 240 and a rear camera unit 221 are disposed on the rear surface of the terminal body 204.

A flash 222 and a mirror (not shown) may be disposed adjacent to the rear camera unit 221. The flash illuminates the subject toward the subject when the subject is photographed by the rear camera unit 221.

The mirror allows the user to illuminate the user's own face or the like in the case where the user intends to photograph (self-photograph) himself / herself by using the rear camera unit 221. [

The rear camera unit 221 may have a photographing direction substantially opposite to that of the front camera unit 216 disposed on the front side and may be a camera having different pixels from the front camera unit 216. [

For example, the front camera unit 216 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 rear camera unit 221 photographs a general subject and immediately transmits It is preferable to have a high pixel. The front and rear camera units 216 and 221 may be installed in the terminal body 204 to be rotatable or pop-upable.

The battery 240 supplies power to the mobile terminal 200. The battery 240 may be embedded in the terminal body 204 or may be detached from the terminal body 204 directly.

4 is an exploded perspective view of FIG.

Referring to FIG. 4, the mobile terminal includes a window 210a and a display module 210b that constitute the display unit 210. Referring to FIG. The window 210a may be coupled to one surface of the front case 201. [ The window 210a and the display module 210b may be integrally formed.

A frame 260 is formed to support electrical elements between the front case 201 and the rear case 202. The frame 260 is a supporting structure inside the terminal and includes a display module 210b, a camera module 221, an antenna device, an antenna module having a plurality of antenna devices, a battery 240, And at least one of them can be supported.

The frame 260 may be partially exposed to the outside of the terminal. In addition, the frame 260 may constitute a part of a sliding module that connects the main body and the display unit to each other in a slide type terminal, not a bar type.

4 shows that the circuit board 250 is disposed between the frame 260 and the rear case 202 and the display module 210b is coupled to one side of the frame 260 . The circuit board 250 and the battery may be disposed on the other side of the frame 260 and the battery case 203 may be coupled to the rear case 202 to cover the battery.

The window 210a is coupled to one surface of the front case 201. A touch sensing pattern 210c may be formed on one side of the window 210a to detect a touch. The touch sensing pattern 210c is formed to sense the touch input and is made of light transmissive. The touch sensing pattern 210c may be mounted on the front surface of the window 210a and may be configured to convert a change in a voltage or the like occurring in a specific portion of the window 210a into an electrical input signal.

The display module 210b is mounted on the rear surface of the window 210a. In this embodiment, a thin film transistor-liquid crystal display (TFT LCD) is disclosed as an example of the display module 210b, but the present invention is not limited thereto.

For example, the display module 210b may be a liquid crystal display (LCD), an organic light-emitting diode (OLED), a flexible display, a three-dimensional display .

As described above, the circuit board 250 may be formed on one side of the frame 260, but may be mounted on the lower side of the display module 210b. At least one electronic device is mounted on the lower surface of the circuit board 250.

In the frame 260, a recessed receptacle is formed to receive the battery 240. A contact terminal connected to the circuit board 250 may be formed on one side of the battery receiving part to supply power to the terminal body.

An antenna device may be formed on the upper or lower end of the mobile terminal. Also, the plurality of antenna devices may be disposed at each end of the terminal, and each antenna device may be configured to transmit and receive radio signals of different frequency bands. Such an antenna device may be formed including conductive members formed on one side of the carrier. For example, the carrier 390 with the conductive members formed thereon can be seated in the portion A shown in Fig. The carrier 390 can be coupled to the A portion of the case 201 by a fastening means such as a screw. At this time, the screw can be fastened to the hole 262 formed in the case 201 through the through hole formed in the carrier 390. The ribs 263 of the frame 260, which will be described later, can define a space in which the carrier 390 is mounted.

The frame 260 may be formed of a metal material so that sufficient rigidity can be maintained even if the frame 260 is formed to have a small thickness. The metal frame 260 may operate as a ground. That is, the circuit board 250 or the antenna device may be grounded to the frame 260, and the frame 260 may operate as the circuit board 250 or the ground of the antenna device. In this case, the frame 260 may extend the ground of the mobile terminal.

The circuit board 250 is electrically connected to the antenna device and is configured to process a wireless signal (or radio electromagnetic wave) transmitted and received by the antenna device. For processing of the radio signal, a plurality of transmission / reception circuits may be formed or mounted on the circuit board 250.

The transceiver circuits may be formed including one or more integrated circuits and associated electrical components. In one example, the transceiver circuitry may include a transmit integrated circuit, a receive integrated circuit, a switching circuit, an amplifier, and the like.

A plurality of transceiver circuits are simultaneously powered by conductive members formed of a conductive pattern that is a radiator, so that a plurality of antenna devices can operate simultaneously. For example, while either one is transmitting, the other can receive, both transmit or both receive.

The coaxial cable may be formed to connect the circuit board and each antenna device to each other. In one example, the coaxial cable may be connected to a feeder that feeds the antenna devices. The power feeding devices may be formed on one surface of the flexible circuit board 242, which is formed to process signals input from the operation unit 217. [ The other surface of the flexible circuit board 242 may be combined with a signal transmission unit formed to transmit a signal of the operation unit 217. [ In this case, a dome may be formed on the other surface of the flexible circuit board 242, and an actuator may be formed in the signal transmission unit.

The antenna devices ANT1 and ANT2 may be formed on one side and the other side of the carrier 390, respectively. Each of the antenna devices ANT1 and ANT2 is formed to transmit and receive signals of different frequency bands.

For example, the first antenna device ANT 1 may be formed to transmit and receive signals of the DCN 1x scheme or the PCS 1x scheme, and the second antenna device ANT 2 may be formed of a DCN EVDO (Evolution-Data Optimized or Evolution- Data Only) system.

In addition, when the first antenna apparatus ANT 1 transmits / receives a signal conforming to the LTE B4 scheme, the second antenna apparatus ANT 2 can be formed to transmit / receive signals conforming to the LTE B13 scheme.

Alternatively, when the first antenna device ANT 1 transmits / receives a signal corresponding to the voice service of the mobile terminal, the second antenna device ANT 2 may be configured to transmit / receive a data signal corresponding to the LTE service of the mobile terminal have.

A flexible circuit board 242 is connected to the lower portion of the carrier 390. The flexible circuit board 242 may be connected to a circuit board 250, one end of which is provided with a control unit. And the flexible circuit board 242 may be connected to the operation unit 217 of the terminal. In this case, the flexible circuit board 242 is formed so that the signal generated by the operation unit 217 is transmitted to the control unit of the circuit board 250. The flexible circuit board 242 is formed at a lower portion of the operation portion 217 to be connected to the operation portion 217 and is in contact with the signal transmission portion 217a formed between the operation portion 217 and the flexible circuit board 242 .

One surface of the flexible circuit board 242 is formed to be in contact with the operation portion 217 and the first antenna device ANT1 and the power supply connection portion F of the second antenna device ANT2 are formed on the other surface of the flexible circuit board 242, The contact portion 242a may be formed so as to be connected to the ground connection portion G, respectively.

The first antenna device ANT1 and the second antenna device ANT2 may constitute an antenna module according to the embodiment described below. Hereinafter, the first antenna device ANT1 corresponds to the first member and the second antenna device ANT2 corresponds to the second member. Hereinafter, the present invention will be described with reference to the drawings.

FIG. 5 is a perspective view of an antenna module according to a comparative example, and FIG. 6 is a diagram showing reflection coefficients according to frequency in the antenna module shown in FIG.

In order to install a plurality of antennas in a smaller space, a plurality of antenna devices may be implemented in one antenna module. The comparative example relates to the formation of the first antenna device and the second antenna device ANT 2 on one carrier.

Referring to FIG. 5, the antenna module 30 according to the comparative example includes a first member 31 and a second member 32. The first member 31 and the second member 32 may operate as the radiators of the first antenna device ANT 1 and the second antenna device ANT 2, respectively. The first member 31 and the second member 32 are disposed close to each other, and are formed so as to resonate at a predetermined frequency, respectively. That is, the first member 31 may be formed to have a predetermined length to resonate at the first frequency, and the second member 32 may be formed to have a predetermined length to resonate at the second frequency. Here, the first frequency may be a low frequency and the second frequency may be a high frequency higher than the first frequency. The first member 31 and the second member 32 may be formed to have a length of about? / 4 corresponding to the first and second frequencies, respectively.

The first member 31 and the second member 32 may be formed of a conductive pattern printed on one side of the carrier 39.

Referring to FIG. 6, it can be seen that the first antenna device including the first member resonates at 500 MHz and 900 MHz as shown through S11, and resonates again in a frequency band of about 2 GHz, which is a harmonic frequency. And the second antenna device ANT 2 including the second member resonates in a frequency band of about 2 GHz or so as revealed through S22.

At this time, the isolation characteristic between the antennas can be examined through S22. It can be seen that the isolation value is less than -15 dB in a frequency band of about 2 GHz due to interference due to the harmonic frequency of the first antenna device. That is, if the first antenna device and the second antenna device ANT 2 are formed close to one antenna module, the antenna performance of the second antenna device ANT 2 in the high frequency band due to the electromagnetic interference between the antenna devices Can be lowered.

Therefore, examples of an antenna configuration capable of preventing performance degradation when a plurality of antenna devices are formed in one antenna module will be described with reference to the drawings.

FIG. 7 is a perspective view of an antenna module according to an embodiment of the present invention, and FIG. 8A is a conceptual view of the antenna module shown in FIG. FIG. 8B is a conceptual diagram illustrating an example in which a magnetic field and an electric field affect each other in a near field, and FIG. 8C is a conceptual diagram illustrating an example of the matching unit shown in FIG. 8A.

The antenna module 300 according to an embodiment of the present invention may be part of a system to provide LTE (Long Term Evolution) communication service to a mobile terminal. Accordingly, the antenna module 300 may include a plurality of antenna devices each configured to transmit or receive a corresponding radio signal so as to perform Carrier Aggregation in an LTE (Long Term Evolution) band.

In order to perform Carrier Aggregation, each antenna device formed in the antenna module 300 may operate in MIMO or diversity.

Referring to FIGS. 7 and 8A, an antenna module 300 according to an embodiment of the present invention includes a first member 310 and a second member 320. The first member 310 and the second member 320 together can operate as the radiator of the first antenna device ANT 1. At this time, the first and second members can operate as a radiator of a dipole antenna.

The first antenna device ANT 1 of the present invention is an antenna using a magnetic effect. Magneto electric effect is a phenomenon in which an object is magnetized in proportion to an electric field when an electric field is applied to the object, or an electric polarization is generated in proportion to a magnetic field when a magnetic field is applied to an object.

Referring to FIGS. 8A and 8B, the first antenna device ANT 1 of the present invention includes a first member 310 and a second member 320. When the first member 310 forms a magnetic field in a near field, As shown in FIG. Conversely, when the first member 310 forms an electric field, the second member 320 may be formed to form a magnetic field. Here, the first member 310 or the second member 320 respectively form a magnetic field or an electric field does not mean that any member forms a magnetic field or an electric field, and any input causes the first member 310 to be in an electric field And the second member 320 forms more electric field than the magnetic field.

When a magnetic field and an electric field are formed simultaneously in the near field, the electric field and the magnetic field are influenced and strengthened due to the magnetic effect. As a result, the intensity of the radiated signal is improved, and the efficiency and bandwidth of the antenna can be improved.

Referring again to FIGS. 8A and 8C, the T matching units 371 'and 372' may be connected to any one of the members so that any one of the members forms a higher magnetic field. The T matching portions 371 'and 372' may be formed to include three inductors connected to each other at one branch point so as to enhance the magnetic field in the near field. These T matching portions 371 'and 372' can strengthen the magnetic field of the member to be fed when the connected member is fed.

Also, as shown in FIGS. 8A and 8C, the transmission line 340 can be connected to any one member so that any one member forms a superior electric field. Transmission line 340 refers to conductors formed to efficiently transmit signals or power between two or more terminals, and may be formed of conductive lines, such as conductors or waveguides, coaxial cables, or PCBs.

That is, when the T matching portions 371 ', 372' enhance the magnetic field by the first member 310, the transmission line 340 enhances the electric field by the second member 320, The strength of the signal can be improved and the first antenna device ANT 1 can exhibit better antenna performance.

Referring to FIGS. 7 and 8A, the first member 310 and the second member 320 may be formed symmetrically with respect to each other. The first member 310 and the second member 320 may be formed to have a predetermined length to resonate at a first frequency. For example, the first member 310 and the second member 320 may be a dipole type antenna / 4 corresponding to the first frequency, respectively. In this case, each member may be formed of a meander structure or a meander structure so that the members can be formed to have a predetermined length in a limited space.

As shown in FIG. 7, the first member 310 and the second member 320 do not have a separate branch for parasitic resonance. That is, the current flows from one end to the other end of the first member 310 and the second member 320 only in one direction. If the current flow is simple, the electric field or the magnetic field formed around the antenna has a simple pattern, so that the Specific Absorption Rate (SAR) of the user can be improved.

7 and 8A, the antenna module 300 includes a third member 330 between the first member 310 and the second member 320 in order to implement more antenna devices in a narrower space . The modularized antenna device contributes to miniaturization of the mobile terminal. And, when the first and second members 310 and 320 resonate at the first frequency, the third member 330 can be formed to resonate at a second frequency higher than the first frequency. That is, the first frequency may be included in a frequency band of about 698 to 900 MHz which is a low frequency band, and the second frequency may be included in a frequency band of about 1710 to 2170 MHz which is a high frequency band.

Since the antenna devices are formed in a narrower space, performance degradation due to interference between the antenna devices may occur. In particular, interference between the first member 310 and the third member 330 or between the second member 320 and the third member 330 may be a problem.

The blocking unit 360 is formed to prevent the first and second members 310 and 320 from resonating at harmonic frequencies in order to reduce the interference between the antennas to improve the isolation. 8A, the first member 310 and the second member 320 are connected to each other by a transmission line 340, and a blocking portion 360 is provided between the transmission line 340 and the feeding portion 351 .

7, the first member 310 and the second member 320 may be formed of a conductive pattern printed on one side of the carrier 390, or may be formed of a circuit board 250 of a terminal or a case As shown in FIG. The carrier 390 may be a dielectric formed with a certain dielectric constant, such as FR-3 made of multiple layers of paper impregnated with an epoxy resin bonding agent, CEM-1 being a synthetic chain having a paper core impregnated with an epoxy resin . In addition, the surface is impregnated with epoxy resin in a woven glass fiber, and the core is composed of CEM-3 impregnated with epoxy resin in nonwoven glass fiber, FR-4 having multiple layers of glass fiber impregnated with epoxy resin, We can include materials such as GI, a part of printed circuit board (PCB) made of multiple layers of woven glass fiber impregnated with multifunction epoxy resin impregnated woven glass fiber with multiple layers of FR-5, polyimide resin impregnated have.

The carrier 390 including the members 310, 320, and 330 may be formed to have a predetermined width so as to be in contact with both sides of the terminal body. For example, the carrier 390 may be housed in the front case, and the front case and the carrier 390 may be formed in contact with each other.

The antenna module 300 of the present invention can be mounted on the lower part of the terminal body. The antenna 300 can be mounted on the lower part of the terminal body by using a carrier 390 having a predetermined width to contact both sides of the terminal body, can do. That is, the performance of the antenna may be limited by the space in which the antenna is mounted. In the antenna module 300 according to the embodiment of the present invention, two antenna devices are formed on one carrier 390, The antenna performance can be increased while using the antenna efficiently. In other words, conventionally, an antenna device may be formed on both sides of the carrier 390 to form two antenna devices as an antenna module. According to the embodiment of the present invention, a frequency other than the first antenna device ANT 1 A second antenna device ANT 2 operating in a band can be additionally formed.

The first antenna device ANT 1 and the second antenna device ANT 2 may have the same characteristic impedance and the value may be 50 ohms. Accordingly, the first antenna device ANT 1 may be a dipole type antenna and the second antenna device ANT 2 may be a monopole type antenna.

The blocking portion 360 may be formed as a conductive pattern on the substrate so as to function as a capacitor and an inductor, respectively. Alternatively, the blocking portion 360 may be formed to include at least one lumped element. An inductor or a capacitor can be used as the lumped-element element.

The blocking unit 360 may block the resonance of the first antenna device ANT 1 in the cut-off frequency band. In addition, even if the first antenna apparatus ANT 1 resonates, it is possible to prevent a signal due to resonance from flowing into the mobile terminal or from radiating a signal. The blocking unit 360 may be configured to block the signals in the F1 to F2 bands if the cut-off frequency band is F1 to F2.

When the blocking unit 360 is formed to include at least one inductor, signals corresponding to frequencies higher than the frequency F1 may be cut off in the cut-off frequency bands F1 to F2, and the cutoff unit 360 may include one or more capacitors It is possible to cut off signals corresponding to frequencies lower than F2 in the cut-off frequency bands F1 to F2. If the blocking unit 360 combines the inductor and the capacitor, it is possible to prevent the first antenna apparatus ANT 1 from resonating in a specific frequency band.

The blocking portion 360 may include a capacitor, an inductor, and a switching element. The switching element may selectively switch the capacitor and the inductor to connect to the power feeder 351 and the transmission line 340, respectively . Alternatively, the switching device may couple the capacitor and the inductor to the feed or transmission line 340 at the same time.

8A, the blocking portions 360 may be formed in a plurality of blocks, and the blocking portions 360 may be connected to the respective members. That is, the blocking unit 360 may be connected to at least one member of the first member 310, the second member 320, or the third member 330. At this time, the blocking unit 360 may block the resonance of the member in the cut-off frequency band, thereby improving the characteristics of the antenna.

Referring to FIG. 8A, the matching portions 371 and 372 may be formed on one side of the members 310 and 320. The matching portions 371 and 372 may be implemented as series elements or shunt elements. When composed of series elements, the reactance, which is the imaginary part of the impedance, can be changed. For example, inductors increase reactance and capacitors lower reactance, so the impedance of a particular frequency band can change. Alternatively, in the case of a shunt element, the resistance, which is the real number of the impedance, can be changed. For example, the impedance of a particular frequency band can be changed by increasing the resistance value of the inductor and lowering the resistance value of the capacitor.

The first and second power feeders 351 and 352 are components that supply current to each member operating as a radiator, and may be configured by combining a balun, a phase shifter, a divider, an attenuator, an amplifier, and the like. The first and second members 310 and 320 may be fed by the first feeder 351 and the third member 330 may be fed by the second feeder 352. Since the first and second power feeders 351 and 352 operate independently of each other and are electrically separated from each other, it is possible to ensure isolation between the antenna devices without providing a separate switch.

FIG. 9A is a view showing a reflection coefficient according to the frequency of the first antenna, and FIG. 9B is a diagram showing radiation efficiency according to the frequency of the first antenna.

The first antenna device ANT 1 of the antenna module according to the embodiment of the present invention is configured such that when the first member 310 forms a magnetic field in a near field, the second member 320 forms an electric field So that the electric field and the magnetic field are influenced and strengthened by the magnetic effect. As a result, the intensity of the radiated signal is improved, and the efficiency and bandwidth of the antenna can be improved.

As shown in FIG. 9A, the first and second members 310 and 320 act as a dipole antenna, while the first member 310 and the second member 320 operate independently as monopole antennas. It can be seen that the bandwidth of the antenna is improved more than two times.

9B, when the first member 310 or the second member 320 independently operates as a monopole antenna, the first and second members 310 and 320 are used as a dipole antenna, It can be seen that the radiation efficiency of the antenna is improved when operating with effect.

9C is a view showing reflection coefficients according to frequencies in the antenna module shown in FIG.

Referring to FIG. 9C, the first antenna device ANT 1 including the first and second members 310 and 320 resonates at 500 MHz and 900 MHz as evidenced by S11, and has a harmonic frequency of about 2 GHz It can be seen that resonance is blocked by the blocking portion 360 in the frequency band of FIG. And the second antenna device ANT 2 including the third member 330 resonates in a frequency band of about 2 GHz as shown in S22.

At this time, the isolation characteristic between the antennas can be examined through S22. It can be seen that due to the harmonic frequency of the first antenna apparatus ANT 1, the isolation value is -15 dB or more in a frequency band of about 2 GHz due to interference . That is, even if the first antenna device ANT 1 and the second antenna device ANT 2 are formed close to one antenna module 300, the blocking part 360 may be formed in the first antenna device ANT 1 in the cut- It can be seen that the electromagnetic interference between the antenna devices reduces the interference. This can reduce antenna performance degradation of the second antenna device ANT 2 in the high frequency band.

As described above, the antenna module 300 according to the embodiment of the present invention can be formed by combining two or more antenna devices in one antenna module, and each antenna device can exhibit a certain antenna performance.

FIG. 9D is a diagram showing a change in the radiation space according to the hand effect. FIG.

The antenna module 300 of the present invention can reduce the body effect by the user, especially when mounted on the lower part of the terminal body. A body effect refers to a change in the characteristics of an antenna when the body is in contact with a specific part of the terminal or near the body. For example, the body effect may be a death grip that causes a drop in the reception ratio when a specific portion of the terminal is held by hand.

As shown in FIG. 9D, when the user grasps the terminal on which the antenna module is mounted, the antenna module according to the embodiment of the present invention can change the radiation space (from the first radiation space to the second radiation space) . That is, in the first antenna device ANT 1, the first and second members 310 and 320 are fed by one feeder, so that the radiation of radio signals through the first and second members 310 and 320 . Since the first and second members 310 and 320 are formed so as to generate a magnetism effect, if the reduction of the radiation space for one member is performed, the enlargement of the radiation space for the other member occurs . That is, as shown in FIG. 9D, the shape of the radiation space is changed and the radiation space is not reduced, so that the characteristics of the antenna are not changed and the reception ratio is not lowered.

In addition, since at least any one member of the first member 310 and the second member 320 is disposed in a space not covered by the palm of the user, it is possible to reduce the reception rate degradation due to the body effect.

As shown in FIG. 7, since the third member 330 is disposed in a space not covered by the palm of the user, it is possible to reduce the reception rate degradation due to the body effect.

FIGS. 10A and 10B are views showing a comparison example of the second antenna device ANT 2 and reflection coefficients according to frequencies, respectively.

The antenna shown in Fig. 10A is a PIFA type antenna, and may include a conductive member 330 'and a power feeder 352'. Such an antenna resonates at a predetermined frequency by the feeding of the feeding part 352 '. The reflection coefficient at this time has a characteristic of a narrow band as shown in Fig. 10B. Particularly, such an antenna device may be electrically or magnetically influenced by surrounding elements and the bandwidth may be further reduced. Accordingly, when the third member 330 ', which operates as the second antenna device ANT 2, is positioned between the first member 310 and the second member 320, the performance of the antenna can be greatly reduced.

Figs. 11A to 11B are diagrams showing an embodiment of the second antenna apparatus ANT 2, respectively, and reflection coefficients according to frequencies. Fig.

Referring to FIG. 11A, the second antenna device ANT 2 may include a third member 330, a second feeder 352, and a shunt capacitor 353. The third member 330 resonates at a predetermined first resonance frequency R1 by the feeding of the second feeder 352 and the shunt capacitor has a second resonance frequency adjacent to the first resonance frequency R2 to further resonate the third member 330. [

As described above, since the dual resonance is formed in the adjacent frequency band, the bandwidth of the antenna can be improved as shown in FIG. 11B. Therefore, the performance of the antenna can be maintained even if the third member 330 operating as the second antenna device is positioned between the first member 310 and the second member 320.

12A and 12B are views showing another embodiment of the second antenna apparatus ANT 2 and reflection coefficients according to frequencies, respectively.

12A, the second antenna device ANT 2 includes a third member 330, a second feeding part 352, a shunt capacitor 353, and a series capacitor 354 . The third member 330 resonates at a predetermined first resonance frequency R1 by the feeding of the second feeder 352 and the shunt capacitor has a second resonance frequency adjacent to the first resonance frequency R2 to further resonate the third member 330. [ And, due to the series capacitor disposed in the third member 330 and the second feeder 352, the antenna efficiency can be improved at the third frequency.

That is, dual resonance is formed at the second frequency and the third frequency, which are adjacent frequency bands, and the reactance is lowered by arranging the series capacitor, whereby the bandwidth of the antenna can be improved as shown in FIG. 12B. Therefore, even better positioning of the third member 330, which acts as the second antenna device, between the first member 310 and the second member 320 can provide better antenna performance.

13 is a view showing an example of the configuration of an antenna module and a circuit board when the mobile terminal is mounted.

Referring to FIG. 10, a transmission / reception circuit portion may be formed on the circuit board 250.

Here, the circuit board may be a flexible circuit board 242 (see Fig. 4). The substrate may be a dielectric substrate or a semiconductor substrate, and a ground may be formed on one surface of the substrate or, if the substrate is a multilayer substrate, any one layer may be grounded. One end of the first to third members 310, 320, and 330 may be grounded and connected to the ground according to the antenna type.

Each of the transmission and reception circuit units may be implemented as a communication chip including at least one of a call processor (CP), a modem chip, an RF transceiver chip, and an RF receiver chip. Therefore, each communication chip transmits a radio signal by feeding the conductive member through the feeding part and the matching part, or receives the received radio signal received by the conductive member through the matching part and the feeding part to perform frequency conversion processing and demodulation processing Or the like can be executed.

The first communication chip 251 and the second communication chip 252 can be divided into a first communication chip 251 and a second communication chip 252. The first communication chip 251 can transmit or receive a radio signal in a low frequency band, The chip 252 can transmit or receive radio signals in the high frequency band.

At this time, the first member 310 and the second member 320 may be connected by the transmission line 340, and the transmission line 340 may be connected to the first communication chip 251 again. And, the transmission line and each member can be connected to each other by the connection portions 253 and 354. The third member 330 may also be connected to the second communication chip by another connection 255.

The connection portions 253, 254, and 255 may be power supply connection portions. The power feeding connection part F electrically connects the feeding part to the conductive member or feeds the conductive member by EM (electro-magnetic) feeding method. For this connection, the feed connection F may include at least one of a feed plate, a power supply clip, or a feeder line. Here, any one of the feed plate, the power supply clip, and the feeder line is electrically connected to the other one to transmit a current (or voltage) supplied through the feeder unit to the conductive members that transmit and receive the wireless signal. Here, the feed line may include a microstrip printed on a substrate.

The antenna module 300, which is electrically connected to the circuit board, may include first to third members 310, 320, and 330 as described above. The first to third members 310, 320, and 330 are integrally formed on the carrier 390.

The first member 310 and the second member 320 are electrically connected to the first communication chip 251 and the third member 330 is electrically connected to the second communication chip 252. As described above, do. Accordingly, the first communication chip 251 processes signals in the low frequency band, and the second communication chip 252 is configured to process signals in the high frequency band, and operate independently of each other. Accordingly, the mobile terminal according to the embodiment of the present invention can reduce the crosstalk of the signal and can process signals belonging to different frequency bands more efficiently.

Although not shown, a ground connection may be formed to connect the third member constituting the second antenna device ANT 2 to the ground. The ground connection G may ground and connect the third member and the ground electrically to short-circuit the impedance to the resonant frequency of the antenna. The ground connection part G has at least two paths having different lengths, and may be formed with a switch corresponding to each path. Also, through a switch that selects each pass, each pass selectively connects the electrical ground and radiators (e.g., conductive members) to different lengths. Here, the path is an electrical path connecting the ground and the radiator, and may include at least one of a ground plate, a grounding clip, or a grounding line. Further, the lengths of the paths can be formed differently by forming the ground wires to have different lengths.

14 is a view showing another example of the configuration of the antenna module and the circuit board when the mobile terminal is mounted.

Hereinafter, the same configuration as that shown in FIG. 10 will be described with reference to a configuration different from the configuration shown in FIG. 10 in place of the preceding description.

11, the first member 310 and the second member 320 may be formed on the carrier 390, and the third member 330 'may be formed on the circuit board.

The third member 330 'may be disposed between the projected first member 310 and the second member 320 when the first member 310 and the second member 320 are projected onto the circuit board . Unlike the previous embodiment, the third member 330 'is formed on the circuit board because the third member 330', which operates in the high frequency band, does not require high antenna performance unlike the low frequency band. Therefore, even if the third member 330 'covers the carrier 390, good antenna performance can be achieved. Further, the first and second members can be spaced apart from each other, thereby improving the isolation characteristic between the antennas.

Then, a transceiver circuit portion may be formed on the circuit board 250.

Here, the circuit board may be a flexible circuit board 242 (see Fig. 4). The substrate may be a dielectric substrate or a semiconductor substrate, and any one of the layers may be ground if the substrate is formed on one side of the substrate or the substrate is a multi-layer substrate. Depending on the antenna type, one end of the conductive member may be grounded to the ground.

Each of the transmission and reception circuit units may be implemented as a communication chip including at least one of a call processor (CP), a modem chip, an RF transceiver chip, and an RF receiver chip. Therefore, each communication chip transmits a radio signal by feeding the conductive member through the feeding part and the matching part, or receives the received radio signal received by the conductive member through the matching part and the feeding part to perform frequency conversion processing and demodulation processing Or the like can be executed.

The first communication chip 251 and the second communication chip 252 can be divided into a first communication chip 251 and a second communication chip 252. The first communication chip 251 can transmit or receive a radio signal in a low frequency band, The chip 252 can transmit or receive radio signals in the high frequency band.

At this time, the first member 310 and the second member 320 may be connected by the transmission line 340, and the transmission line 340 may be connected to the first communication chip again. And, the transmission line 340 and each member can be connected to each other by a connecting portion. The third member 330 'may also be connected to the second communication chip by another connection.

The first member 310 and the second member 320 are electrically connected to the first communication chip 251 and the third member 330 'is electrically connected to the second communication chip 252. Accordingly, the first communication chip 251 processes signals in the low frequency band, and the second communication chip 252 is configured to process signals in the high frequency band, and operate independently of each other. Accordingly, the mobile terminal according to the embodiment of the present invention can reduce the crosstalk of the signal and can process signals belonging to different frequency bands more efficiently.

The antenna module and the mobile terminal having the antenna module described above are not limited to the configuration and the method of the embodiments described above, but the embodiments may be modified so that all or a part of each embodiment Or may be selectively combined.

Claims (23)

A first member and a second member operable as a radiator of an antenna for transmitting and receiving a radio signal;
A first feeder for feeding the first member and the second member; And
And a transmission line connecting the feed member and the second member such that the second member forms an electric field when the first member forms a magnetic field in a near field. The method according to claim 1,
Wherein the first and second members operate as a radiator of a dipole antenna. 3. The method of claim 2,
A third member disposed between the first and second members; And
And a second feeding part for feeding the third member. The method of claim 3,
Wherein the first and second members resonate at a first frequency,
And the third member resonates at a second frequency higher than the first frequency. 5. The method of claim 4,
Further comprising a cutoff portion formed between the feeder and the members to prevent the first and second members from resonating at a harmonic frequency. 6. The method of claim 5,
And the third member is formed to resonate in a frequency band in which the blocking portion blocks. The method of claim 3,
Wherein the first member to the third member are formed on one carrier formed to have a constant permittivity. The method of claim 3,
Further comprising a resonance part formed between the third member and the second feed part so that the third member further resonates at a third frequency adjacent to the second frequency. 9. The method of claim 8,
And the resonant part includes a shunt capacitor for forming the third frequency together with the third member. The method according to claim 1,
A matching portion is formed between the first member and the first feeding portion or between the second member and the first feeding portion to match the impedance,
Wherein the matching portion is formed of at least one lumped element. The method according to claim 1,
And a T matching portion including three inductors connected to each other at a branch point is connected to at least one of the members so as to enhance the magnetic field in the near field. Terminal body; And
And an antenna module embedded in the body and configured to operate at a first frequency and a second frequency,
The antenna module includes:
First and second members fed by a first feeder to resonate at the first frequency; And
And a third member disposed between the members and being configured to transmit and receive a radio signal at the second frequency that is higher than the first frequency by being fed by the second feeder to operate independently . 13. The method of claim 12,
A matching portion is formed between the first member and the first feeding portion or between the second member and the first feeding portion to match the impedance,
Wherein the matching unit is formed of at least one lumped element. 13. The method of claim 12,
The antenna module includes:
Further comprising a transmission line connecting the feeder and the second member such that when the first member forms a magnetic field in a near field, the second member forms an electric field, . 15. The method of claim 14,
The antenna module includes:
Connected to the first or second member,
Further comprising a T matching unit having three inductors connected to each other at one branch point so as to enhance the magnetic field in the near field. 13. The method of claim 12,
The antenna module includes:
Further comprising a blocking portion formed to block resonance of the first and second members at a harmonic frequency,
And the second frequency is included in a frequency band blocked by the blocking unit. 13. The method of claim 12,
Wherein the first and second members operate as a radiator of a dipole antenna. 13. The method of claim 12,
The antenna module includes:
Further comprising a resonance part formed between the third member and the second feeding part such that the third member further resonates at a third frequency adjacent to the second frequency. 19. The method of claim 18,
And the resonance unit includes a shunt capacitor that forms the third frequency together with the third member. 13. The method of claim 12,
Wherein the first member to the second member are formed on one carrier formed to have a constant permittivity. 21. The method of claim 20,
Wherein the carrier is formed to have a constant width so as to contact both side surfaces of the terminal body. 21. The method of claim 20,
A circuit board is disposed under the carrier,
And the third member is formed on the circuit board. 23. The method of claim 22,
Wherein the first and second members are connected to a first communication chip formed on the circuit board,
And the third member is connected to a second communication chip formed on the circuit board.

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