KR20130143475A - Antenna apparatus and mobile terminal having the same - Google Patents

Abstract

The present invention comprises a terminal body including an upper part and a lower part and an antenna apparatus installed in the lower part and the upper part of the main body in order to transmit and receive a wireless signal. The antenna apparatus discloses a mobile terminal comprising: a first member and a second member forming opened slots; an electricity supply unit forming an electric field within the slot when the antenna apparatus is connected to one end of one or more members in order to be resonated in a first frequency band; and an electricity supply extension unit extended from the electricity supply unit for the antenna apparatus to be resonated in a second frequency band. [Reference numerals] (110) Wireless communication unit;(111) Broadcast receiving module;(112) Mobile communication module;(113) Wireless internet module;(114) Local area communication module;(115) Location information module;(120) A/V input unit;(121) Camera;(122) Microphone;(130) User input unit;(140) Sensing unit;(141) Proximity sensor;(150) Output unit;(151) Display unit;(152) Sound output module;(153) Alarming unit;(154) Haptic module;(160) Memory;(170) Interface unit;(180) Control unit;(181) Multimedia module;(190) Power supply unit

Description

ANTENNA APPARATUS AND MOBILE TERMINAL HAVING THE SAME

Embodiments of the present invention relate to a mobile terminal having an antenna device 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 order to solve these problems, researches on the antenna having a new structure are actively conducted.

It is an object of the present invention to provide a mobile terminal having an antenna capable of transmitting and receiving wireless electromagnetic waves in a multi-frequency band.

Another object of the present invention is to provide a mobile terminal having a more compact antenna while having better efficiency.

In order to achieve the above object of the present invention, the antenna device according to an embodiment of the present invention, the first member and the second member, (an antenna device) forming a slot having one side is opened in the first frequency band One end is connected to at least one of the members so as to resonate, and includes a feed part forming an electric field in the slot, and a feed extension extending from the feed part to resonate in a second frequency band (antenna device).

According to an example related to the present invention, the length of the slot extending from the connection portion where the first member and the second member are connected to each other to the opened opening is λ / 4 or λ / of the center frequency of the first frequency band. It may be formed to have a length corresponding to eight.

According to an example related to the present disclosure, the feeding part may be spaced apart from the connecting part by a first distance, and the feeding extension part may extend by a second distance from the feeding part.

According to an example related to the present invention, the first distance is a distance at which the impedance of the first frequency band center frequency is about 50 ohms due to the feeding part, and the second distance is the first distance due to the feeding extension part. It can be formed such that the distance of the impedance of the two frequency band center frequency is about 50 ohm (ohm).

According to an example related to the present invention, the feeder may include a shunt element.

According to an example related to the present invention, the feed extension may include a series element.

According to an example related to the present invention, the feed extension may be formed on one surface of any one of the members.

According to an example related to the present disclosure, at least a portion of the feed extension may be extended in parallel with a spaced apart from any one of the members.

According to an example related to the present invention, a third member extending from the one member to a predetermined length so as to resonate at a third frequency adjacent to the center frequency of the second frequency band, thereby extending the bandwidth of the second frequency band. It may further include.

In order to realize the above object, another embodiment of the present invention includes a terminal main body having an upper portion and a lower portion, and an antenna device disposed above or below the main body and configured to transmit and receive a radio signal, wherein the antenna The device may include a first member and a second member forming an open slot at one side thereof, and one end connected to at least one of the members so that the antenna device is resonated in a first frequency band and forming an electric field in the slot. Disclosed is a mobile terminal including a power supply extension extending from the power supply so that all and the antenna device resonates in a second frequency band.

According to an example related to the present invention, the upper portion or the lower portion in which the antenna device is embedded may be formed slimmer than other portions of the main body.

According to an example related to the present invention, any one of the members may be a conductive frame formed in the main body to support the inside.

According to an example related to the present invention, any one of the members may be a flexible circuit board which is built in the main body and transmits a signal of an operation unit to a control unit.

According to an example related to the present disclosure, any one of the members may be a flexible circuit board which transmits an input / output signal from a socket formed in the main body to be connected to an external device to a controller.

According to an example related to the present invention, any one of the members may be a conductive case forming an appearance of the main body.

According to an example related to the present invention, any one of the members may be a multi-layer printed circuit board having a ground.

According to an example related to the present invention, the electronic device may further include a conductive case forming an exterior of the main body, and an opening communicating with the slot may be formed in the conductive case.

According to an example related to the present invention, the conductive case may be divided into a first conductive case and a second conductive case, and the first conductive case may be separated from the second conductive case bordering the opening and the socket.

According to an example related to the present disclosure, a third member branched from any one member may extend in parallel to the first conductive case to extend the bandwidth of the second frequency band.

According to an example related to the present invention, another antenna device configured to transmit and receive a radio signal of a fourth frequency band may be disposed to cover the antenna device.

The mobile terminal according to at least one embodiment of the present invention configured as described above is capable of impedance matching to operate with a slot antenna while operating as a slot antenna with a predetermined or higher antenna efficiency.

In addition, by forming a slot of the antenna device in the gap required due to the tolerance of the design of the terminal can be used more efficiently in the terminal space.

In addition, even if the antenna is disposed in close proximity to the conductive case, since the first conductive case is separated from the second conductive case, the electromagnetic influence is reduced, thereby preventing performance degradation of the antenna. In addition, since the user's contact, which may affect the antenna device, is made only in the second conductive case, the performance degradation of the antenna due to the body effect can be reduced.

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.
5A to 5B are conceptual views illustrating comparative examples of an antenna device related to embodiments of the present invention, and FIG. 5C is a conceptual view of an antenna device according to an embodiment of the present invention.
6A is a conceptual diagram illustrating an antenna device in a mobile terminal according to a first embodiment of the present invention in which an antenna device is formed.
6B is a conceptual diagram illustrating an example in which a stub is added to the antenna device of FIG. 6A.
FIG. 6C is a diagram illustrating voltage standing wave ratios of the antenna devices shown in FIGS. 6A and 6B.
FIG. 6D is a cross-sectional view taken along the line IV-IV of FIG. 2 in the mobile terminal in which the antenna device shown in FIG. 6A is formed.
7A to 7F are views showing a modification of the antenna device shown in Fig. 6A.
8A to 8B are conceptual views illustrating an antenna device in a mobile terminal according to a second embodiment of the present invention.
9A to 9C are conceptual views illustrating an antenna device and a comparative example in a mobile terminal according to a third embodiment of the present invention.
10 is a conceptual diagram illustrating an antenna device in a mobile terminal according to a fourth embodiment of the present invention.
11 is a conceptual diagram illustrating an antenna device in a mobile terminal according to a fifth embodiment of the present invention.
12A is a conceptual diagram illustrating antenna devices in a mobile terminal according to a sixth embodiment of the present invention.
12B is a perspective view of the antenna device shown in FIG. 12A, and FIG. 12C is a side view of FIG. 12B.

Hereinafter, an antenna apparatus and a mobile terminal including the antenna apparatus 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), and navigation. However, it will be understood by those skilled in the art that the configuration according to the embodiments described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, and the like, unless the configuration is applicable only to a mobile terminal.

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 a broadcast signal 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 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 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 pressure / capacitance), 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 may sense whether the slide phone is opened or closed. In addition, whether the power supply unit 190 is supplied with power, whether the interface unit 170 is coupled to the external device may be sensed. 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. As a result, the controller 180 can know which area of the display unit 151 is touched.

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 photoelectric sensor, a direct reflection photoelectric sensor, a mirror reflection photoelectric sensor, a high frequency oscillation 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 allowing the pointer to be recognized without being in contact with the touch screen so that the pointer is located on the touch screen is referred to as a "proximity touch", and the touch The act of actually touching the pointer on the screen is called "contact touch." 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 sound 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, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. 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. Vibration is a representative example of the haptic effect generated by the haptic module 154. 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 be used for stimulation such as a pin array vertically moving with respect to the contact skin surface, a jetting force or suction force of air through an injection or inlet, grazing to the skin surface, contact of an electrode, and electrostatic force. Various tactile effects can be generated, such as effects by the endothermic and the reproduction of a sense of cold using the elements capable of endotherm or heat generation.

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 include application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), and the like. It may be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing other functions. The described embodiments may be implemented by the controller 180 itself.

According to the software implementation, embodiments such as the procedures and functions described herein may be implemented as 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, for example, 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.

Side keys 214, an interface unit 215, a sound input unit 213, and the like are disposed on side surfaces 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 frame 320 is formed between the front case 201 and the rear case 202 so that electrical elements are supported. The frame 320 is a support structure inside the terminal, and is formed to support at least one of the display module 210b, the camera module 221, the antenna device 300, or the circuit board 250.

A part of the frame 320 may be exposed to the outside of the terminal. In addition, the frame 320 may form part of a sliding module that connects the main body and the display to each other in a slide type terminal other than a bar type.

As an example, the circuit board 250 is disposed between the frame 320 and the rear case 202 and the display module 210b is coupled to one surface of the frame 320. . The circuit board 250 and the battery are disposed on the other surface of the frame 320, 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 sensor (not shown) may be mounted on the window 210a. The touch sensor is formed to sense a touch input and is made of light transmissive. The touch sensor may be mounted on the front surface of the window 210a and configured to convert a change in voltage or the like generated at 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 surface of the frame 320, but may be mounted below the display module 210b. At least one electronic device is mounted on the lower surface of the circuit board 250.

The frame 320 is provided with a recessed shape to accommodate 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 300 may be formed at the top or bottom of the mobile terminal. In addition, the antenna device 300 may be formed in plural and disposed at each end of the terminal, and each antenna device 300 may be formed to transmit and receive radio signals of different frequency bands.

The frame 320 may be formed of a metal material to maintain sufficient rigidity even when formed to a thin thickness. The metal frame 320 may operate as the ground. That is, the circuit board 250 or the antenna device 300 may be grounded to the frame 320, and the frame 320 may operate as the ground of the circuit board 250 or the antenna device 300. In this case, the frame 320 may extend the ground of the mobile terminal.

The circuit board 250 is electrically connected to the antenna device 300, and is configured to process radio signals (or radio electromagnetic waves) transmitted and received by the antenna device 300. In order to process the wireless signal, a plurality of transmit and receive circuits 251 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.

The plurality of transceiver circuits simultaneously feed conductive members, which are radiators, so that the plurality of antenna devices can operate simultaneously. For example, while either one is transmitting, the other can receive, both can transmit or both can receive.

5A to 5B are conceptual views illustrating comparative examples of an antenna device related to embodiments of the present invention, and FIG. 5C is a conceptual view of an antenna device according to an embodiment of the present invention.

Antenna devices according to embodiments of the present invention are antennas modified from slot antennas and are formed to transmit and receive radio signals by resonating in a plurality of frequency bands. In general, slot antenna refers to the operation of the slot antenna to be a radiator of radio waves by forming a slot on a waveguide wall, a cylindrical conductor surface or a planar conductor plate, and feeding a slot-formed portion so that an electric field is formed in the slot. Such a general slot antenna has been used when processing a radio signal of one frequency band, and has not been used when processing a radio signal of a plurality of frequency bands. The reason for this will be described with reference to FIGS. 5A and 5B.

5A and 5B show a slot antenna 30 having one side open as a first comparative example and a second comparative example, respectively. Such an antenna is configured to resonate in a low frequency band with a slot length D shorter than that of a closed slot antenna by a mirror effect. That is, the slot antenna with one side open may resonate in the same frequency band with a length approximately 1/2 of the length of the slot of the slot antenna with both sides closed.

In the case of a slot antenna in which both sides are closed, the slot has a length corresponding to λ / 2 of a wavelength corresponding to the center frequency of the first frequency band in order to radiate radio waves in the first frequency band, and the slot of the slot antenna in which one side is opened Has a length corresponding to λ / 4 of the center frequency wavelength. In other words, the slot antenna having one side open can radiate radio waves corresponding to the radio signals of the low frequency band with slots having a smaller length, thereby miniaturizing its size.

In FIG. 5A, the relationship between impedance and current is shown when the slot antenna 30 emits radio waves in the first frequency band, and the dotted line shows the magnitude of the impedance and the arrow shows the current flowing along the slot periphery. will be.

The first member 31 and the second member 32 form a slot S.

Here, the length D of the slot has a length corresponding to λ / 4 of the first frequency band center frequency wavelength. The radiated impedance to which radio waves are radiated has a value of about 377 ohms and is made at the open end 35 of the slot. Since the impedance matching of the antenna is about 50 ohms, the position of the power supply 33 is spaced apart from the closed portion 34 by a predetermined distance D1 as shown.

FIG. 5B illustrates the flow of impedance and current when radiating radio waves in a second frequency band using the antenna shown in FIG. 5A. Here, the length D of the slot has a length corresponding to λ / 2 of the second frequency band center frequency wavelength. The radiated impedance from which radio waves are radiated has a value of about 377 ohms and is made in the slot center portion in the longitudinal direction.

If the position of the feeder 33 is not changed, the position of the feeder 33 arranged for impedance matching in the first frequency band corresponds to a position of about 300 ohms impedance in the second frequency band. do. In contrast, the position where the impedance matching of the second frequency band is performed is at the position D2 spaced apart from the closed portion by a predetermined length.

Therefore, if the position of the feed section 33 is not changed, impedance matching that makes the slot antenna have a certain efficiency or more in the second frequency band becomes difficult.

That is, when the power supply unit 33 is arranged for impedance matching based on the first frequency band, impedance matching becomes difficult in the second frequency band, and thus satisfactory antenna performance cannot be exhibited in the second frequency band.

The antenna device according to the embodiment of the present invention illustrated in FIG. 5C solves this problem. Referring to the drawings, the antenna device includes a power feeding extension 36 extending from the power feeding portion 33.

The feed extension portion 36 extends from the feed portion 33 so that its impedance is around 50 ohms when the slot antenna is operating in the second frequency band. That is, the feed section 33 is located where the impedance is 50 ohms when the slot antenna is operating in the first frequency band, the feed extension is 50 is the impedance when the slot antenna is operating in the second frequency band It extends by a predetermined length D3 from the power feeding portion 33 to be ohm.

As such, the antenna according to the embodiments of the present invention may be impedance matched to operate with a predetermined antenna efficiency in a plurality of frequency bands without using a balloon or a diplexer.

6A is a conceptual diagram illustrating an antenna device in a mobile terminal according to the first embodiment of the present invention in which an antenna device is formed, and FIG. 6B is a conceptual diagram illustrating an example in which a stub is added to the antenna device of FIG. 6A, and FIG. 6C is 6A and 6B illustrate voltage standing wave ratios of the antenna devices illustrated in FIGS. 6A and 6B.

As shown in FIG. 6A, the antenna device 300 includes a first member 310, a second member 320, a power feeding unit 330, and a power feeding extension 360.

The first member 310 and the second member 320 may be formed as conductive members, and the first member 310 and the second member 320 define a slot S of the antenna device. That is, the empty space between the first member 310 and the second member 320 becomes the slot S of the antenna device. Here, for convenience, the opened portion of the slot S is referred to as the opening 350, and the first member 310 and the second member 320 are connected to each other to be referred to as a connecting portion 340.

The length from the opening 350 of the slot S to the connecting portion 340 is formed to have a length corresponding to λ / 4 or λ / 8 of the first frequency band center frequency. The length of the slot S may be changed by the feeding method of the antenna, the dielectric constant of the dielectric constituting the antenna, or the addition of a capacitor formed in the feeding part. For example, by changing the feeding method, when the antenna device is operated in the λ / 4 resonance mode, the length of the slot may be formed to have a length corresponding to λ / 4 of the center frequency. In addition, the antenna device 300 may be bent in any portion of the slot (S) to form a smaller size, or the slot (S) may be formed in a meander structure.

For example, when the first frequency band is a communication service band corresponding to the GSM 850, the length of the required slot S may be formed to be approximately 45 to 53 mm, and the first frequency band corresponds to the LTE 700 communication service. In the case of a band, the required length of the slot S may be formed to a length of approximately 50 to 60 mm. In addition, the width of the slot S is required to be formed to have a width of at least 0.003 lambda times in consideration of antenna efficiency.

The first member 310 and the second member 320 only need to be formed of a conductive material. In the present embodiment, the first member 310 is selected as a flexible circuit board having a ground, and the second member 320 is selected. Was selected as the frame supporting the inside of the terminal.

The feeder 330 feeds the slot antenna so that the antenna device can resonate at a specific frequency. More specifically, one end of the feeder 330 may be connected to any one member defining the slot so that the feeder 330 forms an electric field in the slot (S).

According to the feeding method, the feeding unit and the members may be connected to each other or at least a part thereof.

According to the direct feeding method, the feeding part extending from the coaxial cable 252 (see FIG. 4) may extend from one member to the other member so as to cross the slot S. FIG. That is, according to the direct feeding method, one end of the feeding unit may be connected to one member, and the other end of the feeding unit may be extended to another member and connected to the other member.

In addition, according to a coupling feeding method, one end of the feeding part may be connected to one member, and the other end may be spaced apart from the other member.

Referring to FIG. 6A, the feeding part 330 extends from the second member 320 toward the first member 310, and one end of the feeding part 330 is connected to the second member 320 according to the coupling feeding method. The other end of the power feeding unit 330 is spaced apart from the first member 310.

As described with reference to FIG. 5C, the position of the power feeding unit 330 is a position spaced apart from the connection unit 340 by a predetermined distance, and the impedance of the first frequency band center frequency is about 50 ohms due to the feeding unit 330. This is the distance. In addition, the power supply unit 330 may include a shunt element implemented by including a capacitor or an inductor for impedance matching. The shunt device can adjust the resistance, which is a real part of the impedance. For example, the inductor increases the resistance and the capacitor lowers the resistance, allowing tuning for impedance matching. Such a shunt element may be implemented as a purified water element concentrated at one end of the feed portion.

The feed extension unit 360 extends from the feed unit 330 by a predetermined distance. This distance may be about 50 ohms of the impedance of the second frequency band center frequency due to the feeding extension 360, or when the antenna device includes the third member as described below, the impedance of the second frequency band center frequency Is a distance of about 50 ohms. The length of the feed extension 360 may be appropriately adjusted for tuning so that the antenna device 300 operates efficiently. In addition, the feed extension 360 may include a series element that includes a capacitor or an inductor for impedance matching. The series device can adjust the reactance value, the imaginary part of the impedance. For example, the inductor increases the reactance and the capacitor lowers the reactance, so tuning for impedance matching is possible. Such a series element may be implemented as concentrated integer elements in any portion of the feed extension 360. That is, the series capacitor may be disposed at one end of the feed extension, or the series inductor may be disposed at any portion of the feed extension.

When the shunt element or the serial element is included in the antenna device, the improved antenna device may be implemented by changing the length or shape of the slot.

For example, in the case of disposing a shunt capacitor in the feeder 330 and a series capacitor in the feed extension 360, the antenna slot may be affected by the lower resistance and the reactance. The length can be formed to a length corresponding to about [lambda] / 8 of the center frequency of the first frequency band. Due to the shortened slot length, the antenna device can be further miniaturized.

The feed extension 360 may be coupled to one surface of the second member 320. In addition, a dielectric may be disposed between the feed extension 360 and the second member 320. As such a dielectric material, FREM composed of multiple layers of paper impregnated with an epoxy resin binder and CEM-1, which is a composite having a paper core impregnated with an epoxy resin, can be used. In addition, the surface of the woven glass fiber is impregnated with epoxy resin, the core is woven glass fiber impregnated with CEM-3, epoxy resin impregnated glass fiber impregnated with FR-4, Materials such as FR-5, which consists of multiple layers of woven glass fibers impregnated with multi-functional epoxy resins, and GI, which consists of layers of woven glass fibers impregnated with polyimide resins, and parts of printed circuit boards (PCBs) are used as dielectrics. Can be.

As shown in FIG. 6A, the feed extension 360 may be coupled to one surface of the second member 320. As described with reference to FIG. 5C, the feed extension unit 360 may extend from the feed unit 330 when the slot antenna operates in the second frequency band so that its impedance is about 50 ohms.

However, as will be described later, when the third member is added, additional resonance occurs in the third frequency band, and because of this, there is an impedance improvement effect in the second frequency band, and thus the feed extension part has an impedance of 150 Ohms in the second frequency band. It can extend from the feed portion to be around (ohm) (see Fig. 5c).

When the center frequency of the second frequency band is approximately 1900 MHz, the length of the feeding extension part 360 extending from the feeding part may be formed to have a length of 8 to 13 mm. This length may be added to or subtracted from the length of the feed extension 360 due to electromagnetic influences of other components constituting the antenna device. An insulator or a dielectric may be disposed between the feed extension 360 and the second member 320.

Unlike the example in which the feed extension 360 is coupled to one surface of the second member 320, the feed extension 360 may be spaced apart from the second member to extend in parallel with the second member. These examples are described in the embodiments below (the embodiments shown in FIGS. 7B-7D). If the feed extension is spaced apart from at least one member and extends parallel to the member, a capacitive coupling occurs between the feed extension and the member. Since the capacitive coupling changes the capacitance value of the antenna device, the distance between the parallel member and the power feeding extension or the length of the power feeding extension may be adjusted to adjust the antenna characteristics. If the feed extension is formed so that such capacitive coupling occurs, the length of the feed extension may be shorter than in the embodiment shown in FIG. 6A.

Referring to FIG. 6B, the antenna device 300 may further include the third member 370 in addition to the first member 310, the second member 320, the power feeding unit 330, and the power feeding extension unit 360 described above. It may include.

Since the radiation of the second frequency band occurs in the center portion of the slot S rather than the opening 350 of the slot S, peripheral efficiency may reduce antenna efficiency in the second frequency band. Therefore, the antenna device 300 may further include a third member 370 to resonate at a third frequency adjacent to the second frequency band. The third member 370 is a kind of stub.

The third member 370 may be formed as a conductive member and may extend from any one of the first member 310 and the second member 320. For example, the third member 370 may extend from the first member 310, and as shown in FIG. 6B, a portion of the third member 370 may be bent to have a predetermined length so as to be parallel to the first member 310. The third member 370 may be formed to have a length corresponding to λ / 4 of the third frequency frequency. The length of the third member 370, that is, the length from one end of the third member connected to another member to the other end of the third member corresponds to the third frequency, and when the third frequency is 2100 MHz, approximately 20 It is preferable to be from 25 mm. The length of the third member may be increased or decreased in the antenna tuning process. For example, when an inductor is added as a series element to a portion of the third member, the length of the third member may be shorter. When the length of the third member is shortened, interference with other antennas mounted in the terminal can be reduced in a mobile terminal having a plurality of antennas.

The graph REF 1 shown in the upper portion of FIG. 6C is a graph showing the voltage standing wave ratio according to the frequency of the antenna device shown in FIG. 6A. As shown, the bandwidth in the first frequency band is somewhat narrow but exhibits satisfactory antenna performance. However, in the second frequency band, the value of VSWR is about 8, and the antenna efficiency of the antenna device may not be satisfied in the second frequency band compared to the first frequency band.

The graph REF 2 shown in the lower part of FIG. 6C is a graph showing the voltage standing wave ratio according to the frequency of the antenna device including the third member shown in FIG. 6B.

Like the antenna device shown in FIG. 6B, the antenna device may further include a third member 370 to resonate at a third frequency adjacent to the center frequency of the second frequency band. In this case, when the center frequency of the second frequency band is approximately 1900 MHz, the third member 370 may be formed such that the third frequency is approximately 2100 MHz. This causes the antenna device to further resonate at the third frequency, as shown in the graph REF 2 shown at the bottom of FIG. 6C. Thus, the antenna device can form a wide bandwidth in the high frequency band including the center frequency and the third frequency of the second frequency band.

When the third member 370 is added, additional resonance occurs in the third frequency band, thereby improving the impedance in the second frequency band. Accordingly, the feed extension unit 360 may extend from the feed unit such that the impedance in the second frequency band is about 150 ohms. That is, there is a margin of impedance matching in the antenna device. In other words, the impedance in the second frequency band is preferably about 50 ohm (ohm), which is the ideal impedance, but the antenna device exhibits a certain antenna performance even if the impedance is about 150 ohm (ohm) in the second frequency band. Thus, adding a third member to the antenna device affords a margin of impedance matching from about 50 ohms to about 150 ohms in the second frequency band.

FIG. 6D is a cross-sectional view taken along the line IV-IV of FIG. 2 in the mobile terminal in which the antenna device shown in FIG. 6A is formed.

Mobile terminals with monopole, PIFA, or folded dipole type antennas separate each member of the antenna from other electrical components. This is because the efficiency of the antenna is reduced due to the change in electrical or magnetic characteristics due to the elements disposed in close proximity. That is, the space in which the antenna is formed in the terminal is required to be made up of a predetermined space or more empty space. Therefore, there is a limitation in the design of the mobile terminal since it is necessary to maintain sufficient space for the antenna to be arranged in the mobile terminal.

However, the mobile terminal according to the embodiments of the present invention is a modified antenna of the slot antenna having a satisfactory efficiency in a plurality of frequency bands, while the electrical elements are close to each conductive member constituting the antenna device 300 Even if deployed, the effect is negligible. This is because any one of the members constituting the antenna device 300 operates as the ground of the mobile terminal. In addition, in the case of the radio signal of the first frequency band, radiation of radio waves occurs on the open side of the slot (S). As a result, the radiation space that should be formed in the terminal is not required as compared to other antenna types according to the embodiments of the present invention, and thus the terminal body can be formed more slim. In addition, as illustrated in FIG. 6D, a terminal having a unique design that is thinner than a portion having a thickness where an antenna is mounted (for example, portions of a terminal on which a display or a battery is mounted) may be implemented. have. That is, the thickness of the terminal body toward the upper or lower can be implemented in the design. As described above, even if the antenna devices according to the present invention is formed in a narrower space is not affected by other electrical elements, and exhibits sufficient antenna performance.

As illustrated in FIG. 6A, the first member 310 may include a socket 219 to which an external device is electrically connected. As such, even if the member defining the slot S includes other electrical connection portions, the antenna maintains a certain level or more, thereby allowing more free terminal design. And since each component can be aggregated, a smaller mobile terminal can be provided to a consumer.

In addition, the mobile terminal according to the embodiments of the present invention can use the space in the terminal more efficiently. 4 and 6A, the first member 310 is a member that electrically connects the keys constituting the operation unit of the terminal and the circuit board 350. Keys are disposed on one surface of the first member 310 and a display is disposed on one surface of the second member 320. The keys and the display 310b are each formed in a predetermined volume, and a plurality of components are assembled to each other. When a plurality of parts are assembled with each other, it is required to leave a space apart from each other by a certain distance due to assembly tolerances or dimensional tolerances of the parts.

In particular, the keys and the display 210b may be disposed to be spaced apart from each other in the longitudinal direction because the user needs to operate while looking at the display as well as the tolerance between the components as described above. As a result, a gap G (see FIG. 6D) is formed between the first member 310 and the second member 320.

In the embodiment of the present invention, this gap is used as the slot S of the antenna device 300. That is, according to embodiments of the present invention, the slot (S) of the antenna device 300 can be formed in the gap required due to the tolerance of the design of the terminal can be utilized more efficiently in the terminal space.

Hereinafter, in the description of the embodiments of FIGS. 7A to 11, the same or similar components as those described above will be omitted and replaced with the above description, and only for other configurations than those described in the above embodiments. Let's explain.

7A to 7F are views showing a modification of the antenna device shown in FIG. 6A.

The antenna device of FIG. 7A includes a first member 410 and a second member 420. The first member 410 and the second member 420 form a slot S of the antenna device. The feeder 430 becomes a gap coupling feed from the first member 410 toward the second member 420. The feed extension 460 is formed on the first member 410 and is bent at one point to extend in parallel with the second member 420. The extended end is grounded to the second member 420. In this way, the feed extension 460 may be formed on one surface of any one of the members forming the slot (S), or may extend in parallel with any one member. In addition, at least some of them may be spaced apart in parallel and the other part may be coupled to one surface of the member.

This variant embodiment is advantageous when it is difficult to form the feed extension 460 in the second member 420. Also in this embodiment, the feed extension 460 allows the antenna device to resonate in a plurality of frequency bands, and exhibits satisfactory antenna performance with a wide bandwidth even in the high frequency band.

The antenna device of FIG. 7B includes a first member 510 and a second member 520. The first member 510 and the second member 520 form a slot S of the antenna device. The feeder 530 extends from the second member 520 toward the first member 510. The power feeding extension 560 extends to a predetermined length and is spaced apart from the first member 510 and the second member 520 along the slot S. One end of the feed extension 560 is grounded to the first member 510. In this way, the power feeding method in which the power feeding extension 560 is formed between the first member 510 and the second member 520 increases the capacitance value of the antenna device. Since the input impedance due to capacitance is inversely related to the frequency, the resonance frequency decreases. Therefore, this embodiment is advantageous to implement an antenna device of a lower frequency band without extending the length of the slot (S).

The antenna device of FIG. 7C includes a first member 610 and a second member 620. The first member 610 and the second member 620 form a slot S of the antenna device. The feeder 630 extends from the first member 610 toward the second member 620. The feeding extension 660 extends to a predetermined length and is spaced apart from the first member 610 and the second member 620 along the slot S. FIG.

One end of the feed extension 660 is grounded to the second member 620. In this way, the power feeding method in which the power feeding extension 660 is formed between the first member 610 and the second member 620 increases the capacitance value of the antenna device. Since the input impedance due to capacitance is inversely related to the frequency, the resonance frequency decreases. Therefore, this embodiment is advantageous to implement an antenna device of a lower frequency band without extending the length of the slot (S).

The antenna device of FIG. 7D includes a first member 710 and a second member 720. The first member 710 and the second member 720 form a slot S of the antenna device. The feeder 730 extends from the first member 710 toward the second member 720. The feeding extension part 760 is bent toward the opening part 750 from the feeding part 730 and extends to a predetermined length, and is spaced apart from the first member 710 and the second member 720 along the slot S. Is placed. One end of the feed extension 760 is bent and grounded to the second member 720.

A portion that is bent from the feeder 730 and extends toward the connector 740 may operate as a stub as the third member 770. Unlike the previous embodiment, the third member 770 may extend in parallel between the first member 710 and the second member 720. As a result, the antenna device can be implemented within a smaller area.

The antenna device shown in FIG. 7E includes a first member 810 and a second member 820. The first member 810 and the second member 820 form a slot S of the antenna device. The feeder 830 extends from the first member 810 toward the second member 820. The feeding extension part 860 is bent toward the opening part 850 from the feeding part 830 and extends to a predetermined length, and is spaced apart from the first member 810 and the second member 820 along the slot S. Is placed. One end of the feed extension 860 is bent and grounded to the second member 820.

A portion bent from the feeder 830 and extending toward the connection part 840 may operate as a stub as the third member 870. One end of the third member 870 may be grounded to the second member 820.

This allows the antenna device to be tuned to achieve better antenna performance by changing impedance matching conditions.

The antenna device illustrated in FIG. 7F includes a first member 910 and a second member 920. The first member 910 and the second member 920 form a slot S of the antenna device on one side of the member M. The member M may be any member constituting a circuit board, a frame, or a mobile terminal. The feeder 930 extends from the first member 910 toward the second member 920. The feeding extension part 960 is bent from the feeding part 930 toward the opening part 950 and extended to a predetermined length, and is spaced apart from the first member 910 and the second member 920 along the slot S. Is placed. One end of the feed extension 960 may be bent and grounded to the second member 920.

Unlike the previous embodiments, the slot S of the present invention is formed in the thickness direction of the member M, not in the width direction. Such an antenna device occupies less space and can be arranged freely in a mobile terminal.

And, as shown in the figure, the antenna device may be formed in plural on the side surfaces of the member (M).

8A to 8B are conceptual views illustrating an antenna device in a mobile terminal according to a second embodiment of the present invention.

Referring to FIG. 8A, the antenna device includes a first member 1110 and a second member 1120. The first member 1110 and the second member 1120 are spaced apart from each other and open to one side to form a slot S of the antenna device. The first member 1110 is a part of a case forming an appearance of the terminal body. Such a case may be a conductive member forming the side appearance of the terminal. The conductive member may be part of the front case 201 or the rear case 202.

For example, the second member 1120 may be a frame supporting the inside of the terminal. On the contrary, the second member 1120 is a flexible circuit board which transmits a signal of an operation unit to a control unit, or a flexible circuit board which transmits signals input and output from a socket 219 that is built in the main body to be connected to an external device. Can be.

The feeder 1130 extends toward the first member 1110 from the second member 1120 to feed the slot S. The feed extension unit 1160 extends from the feed unit 1130 to a predetermined length.

Referring to FIG. 8B, the antenna device includes a first member 1110 ′ and a second member 1120 ′. The first member 1110 ′ and the second member 1120 ′ are spaced apart from each other, and one side thereof is opened to form a slot S of the antenna device. The slot S extends from the connection 1140 ′ as shown and is bent at any one point. By configuring the slot S in this manner, the length of the slot S can be extended in a narrower space, so that a free antenna device can be designed. That is, the antenna device for transmitting and receiving a radio signal of a low frequency band in a limited space can be implemented. In addition, a plurality of such antenna devices may be formed.

The first member 1110 ′ is part of a case forming an appearance of the terminal body. Such a case may be a conductive member forming the side appearance of the terminal. The conductive member may be part of the front case 201 or the rear case 202.

For example, the second member 1120 ′ may be a frame that supports the inside of the terminal. In contrast, the second member 1120 ′ is a flexible circuit board that transmits a signal of an operation unit to a controller, or a flexible circuit that transmits input / output signals from a socket 219 built in a main body to be connected to an external device. It may be a substrate.

The feeder 1130 ′ feeds the slot S while extending from the second member 1120 ′ toward the first member 1110 ′. The feed extension portion 1170 ′ extends from the feed portion 1130 ′ to a predetermined length.

As illustrated in FIGS. 8A and 8B, the conductive member forming the external appearance of the terminal may be used as a member constituting the antenna device, thereby making the internal structure of the terminal more compact.

9A to 9C are conceptual views illustrating an antenna device and a comparative example in a mobile terminal according to a third embodiment of the present invention.

In this embodiment, an example in which a plurality of antennas are formed will be described. The first antenna device may operate as the slot antenna described above, and the second antenna device may operate as a monopole, dipole, or PIFA type antenna.

As shown in FIG. 9A, the first member 1210 and the second member 1220 form a slot S of the antenna. For example, the first member 1210 may be a flexible circuit board that transmits a signal of the operation unit to the controller, and the second member 1220 may be a frame supporting the inside of the terminal.

The feeding of the first antenna device may be performed by the feeding part 1230 connected to the coaxial cable from the circuit board 1250. The feed extension 1260 extends from the first feed unit 1230.

Then, the fourth member 1280 implementing the second antenna device is fed to emit a signal of the fourth frequency band. In this case, the fourth member 1280 may be a conductive case forming the exterior of the terminal body. In this case, the power supply may be made from the second power supply unit 1290 having one end connected to another coaxial cable extending from the circuit board 1250 having the ground. As a result, the fourth member 1280 may operate as a monopole or dipole type antenna.

In this manner, the first antenna device and the second antenna device are arranged in close proximity to each other, but each has a separate ground. That is, since the ground of the first antenna device becomes the second member 1220 and the ground of the second antenna device becomes the circuit board 1250, the ground of each antenna device is independently implemented.

When the mobile terminal has a plurality of antennas, an antenna to antenna isolation may be a problem. However, in the present embodiment, the main positions where the radio waves of the first antenna device and the second antenna device are radiated are directed in different directions. That is, the main radiation direction of the first antenna device is directed to the first side, and the main radiation direction of the second antenna device is directed to the second side orthogonal to the first side.

As described above, according to embodiments of the present invention, even if a plurality of antenna devices operate in MIMO or diversity, the first antenna device (main antenna on the transmitting or receiving side) and the second antenna device (receiving side of the diversity or MIMO system) are described. A mobile terminal having a low mutual coupling and an envelope coefficient can be implemented.

When at least one of the plurality of antenna devices mounted on the mobile terminal is implemented by the slot antenna according to the present invention, the plurality of antenna devices may be implemented in a more limited space than the conventional mobile terminal. That is, according to embodiments of the present invention. The first antenna acting as a slot antenna and the second antenna of the monopole or dipole or PIFA type are arranged in close proximity to each other at a portion of the bezel of the terminal (space in the terminal body extending from the outside of the display to the case of the terminal) or as described below. They may be stacked and placed together.

As described above, since the bezel of the main body of the terminal can be reduced due to the characteristics of the slot antenna device according to the embodiments of the present invention, a mobile terminal having a plurality of smaller and more compact antenna devices can be implemented.

FIG. 9B illustrates another example in which a plurality of antenna devices are mounted, wherein the first antenna device 1200 ′ operates as the slot antenna described above, and the second antenna device is a monopole or dipole or PIFA type antenna. It can work.

The second antenna device may be formed of a carrier 1285 'and a conductive pattern 1280' formed on one surface of the carrier 1285 '.

The second antenna device is disposed to cover one surface of the first antenna device 1200 ′. That is, the first antenna device and the second antenna device are stacked on each other. The stacked structure of the antenna can freely arrange various mechanisms in the terminal, and further miniaturize the terminal.

As described above, since the first antenna according to the embodiment of the present invention is not affected by peripheral devices, more free design is possible.

 9C shows, as a comparative example, that the first antenna device and the second antenna device are each formed as an antenna of a monopole, dipole or PIFA type. Each antenna device may be formed of a carrier 1285 '', 1285 '' 'and a conductive pattern 1280' ', 1280' '' formed on any one surface of the carrier 1285 '', 1285 '' '. .

These antenna devices are affected by the peripheral fixtures and must be spaced apart from the electrical elements 250 and 310 '' '. Therefore, when implementing a plurality of antenna devices, since each antenna device should be spaced apart from other electrical elements, a space that can be used as an antenna in the terminal is limited. In addition, the design of the terminal is constrained by the antenna device, and it is difficult to miniaturize the terminal.

As shown in FIG. 9B, unlike the antenna device shown in FIG. 9C, the antenna device according to the embodiments of the present invention has almost no antenna efficiency deterioration due to electrical elements disposed in the periphery, and thus, more free terminal design is possible. Do.

10 is a conceptual diagram illustrating an antenna device in a mobile terminal according to a fourth embodiment of the present invention.

In this embodiment, a mobile terminal having a plurality of slot antennas is disclosed. In the antenna device, the first member 1310 and the second member 1320 form the first slot S, and the fourth member 1310 'and the fifth member 1320' define the second slot S. Can be formed.

The third member 1370 may extend from any one member. The third member 1370 may operate as an element related to impedance matching with respect to the slot antenna, and may also operate as an element causing resonance at another frequency.

A plurality of feeder 1330 is also formed. That is, the first feeding unit 1330, the fourth member 1310 ′, and the fifth member 1320 ′ are formed to feed the slot S formed by the first member 1310 and the second member 1320. The second feeding part 1330 ′ may be provided to feed the slot S. FIG. The first feeder 1330 and the second feeder 1330 ′ include a first feed extension 1360 and a second feed extension 1360, respectively.

The feed extensions 1370 and 1370 'extend from the feed units 1330 and 1330', respectively, for impedance matching corresponding to the center frequency of the high frequency band.

In this embodiment, since the ground of the first slot S antenna becomes the first member 1310 and the ground of the second slot antenna becomes the fourth member 1310 ', the ground of each antenna device is independently implemented. do.

As described above, according to the exemplary embodiments of the present invention, even if a plurality of antenna devices operate in MIMO or diversity, the grounds of the respective antenna devices are implemented independently of each other. A mobile terminal having low mutual coupling and envelope correlation coefficient between two slot antennas (receive sub-antenna of diversity or MIMO system) can be implemented.

11 is a conceptual diagram illustrating an antenna device in a mobile terminal according to a fifth embodiment of the present invention.

The rear case 202 'covered by the battery case 203 of the terminal has a slot (S). The upper part may be the first member 1410 and the lower part may be the second member 1420 based on the slot S. In the present embodiment, the rear case 202 'is formed of a conductive material, and the slot S is formed in the rear case 202'. This slot S may be filled with a dielectric having a constant dielectric constant.

The feeder 1430 extends from the second member 1420 toward the first member 1410, and the feed extension 1460 extends from the feeder 1430 to a predetermined length.

According to the present embodiment, the rear case 202 'itself may be implemented as a slot antenna in the terminal body in which the rear case 202' is made of a conductive material.

In this way, by using a rear case 202 ′ forming the exterior of the terminal as a member constituting the antenna device, a part of the antenna device is positioned outside the main body, thereby making the terminal internal structure more compact.

12A is a conceptual diagram illustrating antenna devices in a mobile terminal according to a sixth embodiment of the present invention. FIG. 12B is a perspective view of the antenna device shown in FIG. 12A and FIG. 12C is a side view of FIG. 12B.

According to embodiments of the present invention, the conductive case 202 may be formed to cover the side surface of the terminal body. This case 202 forms the appearance of the terminal body. When the external appearance of the terminal is formed of the conductive case 202, a sufficient rigidity can be maintained at a thin thickness, and a unique external appearance can be formed. Although only the rear case 202 is used as an example of the conductive case, the front case 201 may also be the case according to the sixth embodiment.

The conductive case 202 may be divided into a first conductive case 202a and a second conductive case 202b. The first conductive case 202a may be disposed on one side of the upper or lower side of the terminal body, and the second conductive case 202b may be formed to cover the other side surfaces of the terminal body except for the first conductive case 202a. have. When a plurality of antennas are formed, a plurality of first conductive cases 202a may also be formed.

A dielectric is formed between the first conductive case 202a and the second conductive case 202b. That is, the first conductive case 202a and the second conductive case 202b are separated from each other with a dielectric interposed therebetween. As a result, the first conductive case 202a is separated from the ground of the terminal and is in an electromagnetic floating state. Therefore, even if the first antenna (antenna including the first member and the second member) is disposed in close proximity to the first conductive case 202a, the electromagnetic influence due to the first conductive case 202a is reduced, so that the first antenna The performance degradation of the antenna can be prevented.

In addition, since the first conductive case 202a and the second conductive case 202b are separated from each other, deterioration of characteristics of the antenna due to the body effect can be reduced. Body effect means that the characteristics of the antenna change when the body comes into contact with or is close to a certain part of the terminal. For example, a death grip, in which a reception rate decreases when a certain portion of the terminal is held by hand, may be referred to as a body effect. As shown in FIG. 12B, the first conductive case 202a is disposed at the top or the bottom of the terminal, and the contact of the user, which may affect the antenna device, is made only at the second conductive case 202b, thereby allowing the body to be touched. The degradation of antenna performance due to the effect can be reduced.

The conductive case 202 has an opening 202c in communication with the slot S of the first antenna device. The opening 202c may be filled with a dielectric as described above. Thus, the first conductive case 202a and the second conductive case 202b may be separated from each other by the opening 202c and the socket 219. Thus, by forming the opening 202c using the conductive case 202, the opening area of the first antenna device can be extended to the outside of the terminal body.

As shown in FIG. 12A, the first antenna device and the second antenna device 1580 are stacked on each other. For example, the second antenna device 1580 may be disposed to cover the first antenna device. As described in the first embodiment, the first antenna device may include a first member 1510, a second member 1520, a power feeding unit 330, and a power feeding extension unit 360. The antenna device 1580 may be formed of a monopole, PIFA, or folded dipole antenna type.

As described above, the first member 1510 and the second member 1520 of the first antenna device may be formed as conductive members, and the first member 1510 and the second member 1520 may be slots of the antenna device. S) is defined. That is, the empty space between the first member 1510 and the second member 1520 becomes the slot S of the antenna device. The feeder 1530 is formed so that the antenna device including the slot S resonates in the first frequency band, and the feed extension 1560 is formed so that the antenna device resonates in the second frequency band.

In addition, since the radiation of the second frequency band occurs in the center portion of the slot S rather than the opening 202c of the slot S, antenna efficiency may decrease in the second frequency band due to peripheral devices. Therefore, the antenna device may further include a third member 1570 to resonate at a third frequency adjacent to the second frequency band. The third member 1570 operates as a kind of stub. The third member 1570 extends in parallel with the first conductive case 202a.

A matching unit 1531 may be formed between the feeding unit 1530 and the feeding extension unit 1560 to match an impedance in a specific frequency band.

Referring to FIG. 12C, a carrier 1580 may be formed between the first antenna device ANT 1 and the second antenna devices ANT 2 and 1580, and the radiator of the second antenna device 1580 may be a carrier 1580. It may be formed of a conductive pattern (1581) printed on the.

Carrier 1580 is a dielectric formed with a constant dielectric constant, FR-3 consisting of a layer of paper impregnated with an epoxy resin binder, CEM-1 which is a composite having a paper core impregnated with an epoxy resin may be used. . 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 multifunctional epoxy resin impregnated woven glass fiber, FR-5 with multiple layers, polyimide resin impregnated have

The second antenna device 1580 is formed to transmit and receive a signal of a fourth frequency band, and the conductive pattern 1581 which acts as a radiator may be configured to form an electrical length corresponding to the fourth frequency band.

The conductive pattern 1581 may be connected to a substrate formed to process a radio signal by a power supply connection part or a ground connection part according to the antenna type. For example, a monopole antenna may be fed and grounded by a feed connection unit, and a PIFA type antenna may be connected to a board having a feed connection unit and a ground connection unit.

The feed connection part F may be formed to feed the feed part and the conductive member by an electrical connection or an 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 ground connection G can ground and electrically connect the conductive member and the ground to achieve an impedance match 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.

Referring to FIG. 12A, a matching unit 1582 may be formed between the conductive pattern 1571 that is a radiator and the power supply connection unit 1583. The matching unit 1582 may be implemented as a series device or a shunt device. In the case of a series device, a reactance value, which is an imaginary part of impedance, may be changed. For example, since the inductor increases the reactance and the capacitor lowers the reactance, the impedance of a specific frequency band may change. Alternatively, in the case of the shunt element, a resistance value, which is a real part of impedance, may be changed. For example, the inductor increases the resistance value and the capacitor decreases the resistance value so that the impedance of a specific frequency band may be changed.

The mobile communication terminal can communicate with wireless base stations using wireless communication. For example, cellular phones may have cellular telephone bands (e.g., major Global System for Mobile Communications or GSM cellular phone bands of 850 MHz, 900 MHz, 1800 MHz, and 1900 MHz). To communicate with each other. In addition, it must be able to communicate in the 1.92 ~ 2.17 GHz band for the Wideband Code Division Mutiple Accees (WCDMA) service. Furthermore, for the B13 or B17 communication service of Long Term Evolution (LTE), communication should be possible in the 704 to 960 MHz band. In order to provide a communication service in such a multi-frequency band, the mobile terminal according to the embodiments of the present invention includes a slot (S), a feeder and a feed extension.

The antenna device and the mobile terminal having the same described above are not limited to the configuration and method of the embodiments described above, the embodiments are all or part of each embodiment so that various modifications can be made It may alternatively be configured in combination.

Claims (26)

A first member and a second member forming a slot in which one side is opened;
A feeder unit having one end connected to at least one member so as to resonate in the first frequency band (antenna device) and forming an electric field in the slot; And
An antenna device comprising a feed extension portion extending from the feed portion so that the (antenna device) resonates in a second frequency band. The method of claim 1,
The length of the slot extending from the connecting portion where the first member and the second member are connected to each other to the opened opening is a length corresponding to λ / 4 or λ / 8 of the first frequency band center frequency. Antenna device. 3. The method of claim 2,
The feeding part is disposed spaced apart from the connecting part by a first distance,
And the feed extension portion extends by a second distance from the feed portion. The method of claim 3,
The first distance is a distance at which the impedance of the first frequency band center frequency is about 50 ohms due to the feeder,
And the second distance is a distance at which the impedance of the center frequency of the second frequency band is about 50 ohms due to the feeding extension part. 5. The method of claim 4,
And the power supply unit includes a shunt element. 5. The method of claim 4,
And the feed extension includes a series element. The method of claim 1,
And the power feeding extension part is formed on one surface of any one of the members. The method of claim 1,
At least a portion of the feed extension extends in parallel and spaced apart with respect to any one of the members. The method of claim 1,
And an antenna further comprising a third member extending from the one member to a predetermined length so as to resonate at a third frequency adjacent to the center frequency of the second frequency band, thereby extending the bandwidth of the second frequency band. Device. A terminal body having an upper portion and a lower portion;
An antenna device disposed above or below the main body and configured to transmit and receive a radio signal;
The antenna device includes:
A first member and a second member forming a slot in which one side is opened;
A power supply unit having one end connected to at least one member so that the antenna device resonates in a first frequency band and forming an electric field in the slot; And
And a feed extension portion extending from the feed portion so that the antenna device resonates in a second frequency band. The method of claim 10,
The upper portion or the lower portion in which the antenna device is built in is slimmer than other portions of the main body. The method of claim 10,
One of the members is a mobile terminal, characterized in that the conductive frame is built in the main body to support the inside. The method of claim 10,
Any one of the members is a mobile terminal, characterized in that the flexible circuit board is embedded in the main body to transmit a signal of the operation unit to the control unit. The method of claim 10,
One of the members is a mobile terminal, characterized in that the flexible circuit board for transmitting a signal input and output from the socket formed in the main body to be connected to an external device to the control unit. The method of claim 10,
One of the members is a mobile terminal, characterized in that the conductive case forming the appearance of the main body. The method of claim 10,
Any one of the members is a multi-layer printed circuit board formed with a ground. The method of claim 10,
The length of the slot extending from the connecting portion where the first member and the second member are connected to each other to the opened opening is a length corresponding to λ / 4 or λ / 8 of the first frequency band center frequency. Mobile terminal. 18. The method of claim 17,
The feeding part is disposed spaced apart from the connecting part by a first distance,
And the power feeding extension portion extends from the power feeding portion by a second distance. 19. The method of claim 18,
The first distance is a distance at which the impedance of the first frequency band center frequency is about 50 ohms due to the feeder,
And wherein the second distance is a distance at which the impedance of the second frequency band center frequency is about 50 ohms due to the power feeding extension. The method of claim 10,
The power supply extension unit is characterized in that formed on one surface of any one of the members. The method of claim 10,
At least a portion of the feed extension is a mobile terminal, characterized in that extending in parallel with respect to any one of the members. The method of claim 10,
And further comprising a third member extending from the one member to a predetermined length so as to resonate at a third frequency adjacent to the center frequency of the second frequency band, thereby extending the bandwidth of the second frequency band. terminal. The method of claim 10,
Further comprising a conductive case for forming the appearance of the main body,
And an opening communicating with the slot in the conductive case. 24. The method of claim 23,
The conductive case is divided into a first conductive case and a second conductive case,
And the first conductive case is separated from the second conductive case bordering the opening and the socket. 25. The method of claim 24,
And a third member branching from the one member to extend the bandwidth of the second frequency band, extending in parallel to the first conductive case. The method of claim 10,
And another antenna device configured to transmit and receive a radio signal of a fourth frequency band to cover the antenna device.

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