KR101728800B1 - Antenna for portable terminal - Google Patents

Abstract

An antenna for a mobile terminal is disclosed. The antenna may be designed on the outer surface of the printed circuit board or embedded in the printed circuit board. And an antenna carrier for supporting at least one radiator coupled to the first radiator at a predetermined distance. Accordingly, the manufacturing cost of the antenna can be reduced, and the mobile terminal can be made slimmer, thereby improving the usability of the mobile terminal.

Description

ANTENNA FOR PORTABLE TERMINAL [0002]

The present invention relates to an antenna for a mobile terminal.

In recent years, portable terminals have various services and application programs such as portable internet, video call, multimedia file playback and the like in addition to functions of conventional voice call. In addition, portable terminals that satisfy various user demands such as ease of use, portability, and appearance are becoming smaller, lighter, and slimmer.

In order to improve the usability of the portable terminal and miniaturize and slim the portable terminal, various design techniques for the antenna for wireless communication are being demanded.

Disclosure of Invention Technical Problem [8] The present invention provides a mobile terminal antenna capable of reducing the manufacturing cost of an antenna and improving the performance characteristics of the antenna while slimming the portable terminal.

The present invention is not limited to the above-mentioned problems, and other matters not mentioned may be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a mobile terminal including a printed circuit board, a first radiator, and an antenna carrier. The printed circuit board is located inside the mobile terminal housing, and the first radiator is formed on the printed circuit board and receives an RF signal from the RF transceiver to radiate electromagnetic waves. The antenna carrier is fixed to one side of the inside of the mobile terminal housing so as to be spaced apart from the printed circuit board by a predetermined distance to support at least one radiator which is spaced apart from and coupled to the first radiator.

The first radiator may be formed on the outer surface of the printed circuit board.

The first radiator may be embedded in a printed circuit board.

A mobile terminal according to another aspect of the present invention includes a printed circuit board inside a mobile terminal housing; A first antenna pattern which is spaced apart from the first feeding part formed on the upper surface of the printed circuit board on the rear housing side and spaced apart from the second feeding part formed on the lower surface of the printed circuit board on the front housing side, The RF transmitting unit is divided into a first feeding unit and a second feeding unit to transmit the RF signal of the RF transmitting unit to the first antenna pattern and the second antenna pattern, respectively.

According to the antenna for a mobile terminal according to the embodiment of the present invention, the manufacturing cost of the antenna can be reduced by embedding the first radiator in the printed circuit board or by designing the first radiator on the outer surface of the printed circuit board.

In addition, according to the present invention, the mobile terminal can be made slimmer and the usability of the mobile terminal can be improved.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.
2A is a perspective view of an example of a mobile terminal or a mobile terminal according to the present invention.
FIG. 2B is a rear perspective view of the portable terminal shown in FIG. 2A.
3A is a cross-sectional view taken along the line AA 'of the mobile terminal shown in FIG. 2A, and shows an example of a vertical structure of a mobile terminal having an antenna according to an embodiment of the present invention.
FIG. 3B is a plan view showing the structure of a printed circuit board in a mobile terminal having the antenna shown in FIG. 3A.
3C is a plan view showing the structure of a printed circuit board of a mobile terminal having an antenna in which a first radiator is used as a feeding part in FIG. 3B.
FIG. 3D is a plan view showing the antenna structure of the mobile terminal shown in FIG. 3A.
4A is a cross-sectional view taken along the line AA 'of the mobile terminal shown in FIG. 2A, illustrating a vertical structure of a mobile terminal having an antenna according to an embodiment of the present invention.
FIG. 4B is a view illustrating the structure of a printed circuit board in a mobile terminal having the antenna shown in FIG. 4A.
FIG. 4C is a view showing a state in which the feeding portion is implemented in the outer layer of the printed circuit board in FIG. 4B.
4D is a plan view showing the antenna structure of the mobile terminal shown in FIG. 4A.
5 is a diagram illustrating an example of a vertical structure of a mobile terminal having an antenna according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

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 a navigation device.

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

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

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

Hereinafter, the components will be described in order.

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

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

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast-related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast-related information may exist in various forms. For example, an EPG (Electronic Program Guide) of a DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of a DVBH (Digital Video BroadcastHandheld).

The broadcast receiving module 111 receives broadcast signals using various broadcasting systems. In particular, the broadcast receiving module 111 may be a digital multimedia broadcasting broadcasting (DMBT), a digital multimedia broadcasting satellite (DMBS), a media forward link only (MediaFLO), a digital video broadcasting ), And ISDBT (Integrated Services Digital Broadcast Terrestrial). Of course, the broadcast receiving module 111 may be adapted to other broadcasting systems that provide broadcast signals 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 refers to a module for wireless Internet access, and the wireless Internet module 113 can be embedded in the mobile terminal 100 or externally. WLAN (WiFi), 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 the short distance communication technology.

The location information module 115 is a module for confirming or obtaining the location of the mobile terminal. A typical example of the location information module is a GPS (Global Position System) module. According to the current technology, the GPS module 115 calculates information on a distance (distance) from three or more satellites to one point (entity), information on the time when the distance information is measured, , Three-dimensional position information according to latitude, longitude, and altitude of one point (individual) in one hour can be calculated. Further, a method of calculating position and time information using three satellites and correcting the error of the calculated position and time information using another satellite is also used. The GPS module 115 continues to calculate the current position in real time and uses it to calculate speed information.

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 display module 151. [

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

The microphone 122 receives an external sound signal through a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

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

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

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

The display module 151 displays information processed by the mobile terminal 100. For example, when the mobile terminal 100 is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the 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 module 151 may be a liquid crystal display, a thin film transistor liquid crystal display, an organic light emitting diode, a flexible display, a 3D display And may include at least one.

Some of these displays may be transparent or light transmissive so that they can be seen through. This may be referred to as a transparent display. A typical example of the transparent display is a transparent LCD or the like. The rear structure of the display module 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 module 151 of the terminal body.

There may be two or more display modules 151 according to the embodiment of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display modules may be spaced apart or integrally arranged on one surface, and may be disposed on different surfaces, respectively.

In a case where the display module 151 and the sensor for sensing the touch operation (hereinafter, referred to as 'touch sensor') have a mutual layer structure (hereinafter referred to as 'touch screen' 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 module 151 or a capacitance generated in a specific portion of the display module 151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

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

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

Examples of the proximity sensor include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor.

And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

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

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

The audio output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 152 outputs an acoustic signal related to a function (e.g., a call signal reception sound, a 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 audio signal may also be output through the display module 151 or the audio output module 152.

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

In addition to the vibration, the haptic module 154 may be configured to perform various functions such as an effect of stimulation by a pin arrangement vertically moving with respect to a contact skin surface, an effect of stimulation by air spraying force or suction force through a jet opening or a suction opening, A variety of tactile effects such as an effect of stimulation through contact of an electrode, an effect of stimulation by an electrostatic force, and an effect of reproducing a cold sensation using a heat absorbing or exothermic element can be generated.

The haptic module 154 can be implemented not only to transmit the tactile effect through the direct contact but also to feel the tactile effect through the muscles of the user's 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 At least one of a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read- Type storage medium. 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 receives power from the external device to transfer the data to each component in the mobile terminal 100 or to transmit data in the mobile terminal 100 to an external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, 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) (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 may be a path through which power from the cradle is supplied to the mobile terminal 100, or various command signals input by the user to the cradle may be transmitted It can be a passage to be transmitted to the 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 control unit 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.

2A is a perspective view of an example of a mobile terminal or a mobile terminal according to the present invention.

The disclosed mobile terminal 100 has a bar-shaped terminal body. However, the present invention is not limited thereto, and can be applied to various structures such as a slide type, a folder type, a swing type, and a swivel type in which two or more bodies are relatively movably coupled.

The body includes a case (a casing, a housing, a cover, and the like) which forms an appearance. In this embodiment, the case may be divided into a front case 101 and a rear case 102. [ A variety of electronic components are embedded in the space formed between the front case 101 and the rear case 102. At least one intermediate case may be additionally disposed between the front case 101 and the rear case 102. [

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 151, the sound output unit 152, the camera 121, the user input units 130/131 and 132, the microphone 122, the interface 170, and the like may be disposed in the front body 101 have.

The display unit 151 occupies most of the main surface of the front case 101. A sound output unit 151 and a camera 121 are disposed in an area adjacent to one end of both ends of the display unit 151 and a user input unit 131 and a microphone 122 are disposed in an area adjacent to the other end. The user input unit 132, the interface 170, and the like are disposed on the side surfaces of the front case 101 and the rear case 102.

The user input unit 130 is operated to receive a command for controlling the operation of the portable terminal 100 and may include a plurality of operation units 131 and 132. The operation units 131 and 132 may be collectively referred to as a manipulating portion and may be employed in any manner as long as the user operates in a tactile manner.

The contents inputted by the first or second operation units 131 and 132 may be variously set. For example, the first operation unit 131 receives commands such as start, end, scroll, and the like, and the second operation unit 132 controls the size of the sound output from the sound output unit 152 or the size of the sound output from the display unit 151 To the touch recognition mode of the touch screen.

FIG. 2B is a rear perspective view of the portable terminal shown in FIG. 2A.

Referring to FIG. 2B, a camera 121 'may be further mounted on the rear surface of the terminal body, that is, the rear case 102. The camera 121 'may have a photographing direction substantially opposite to the camera 121 (see FIG. 2A), and may be a camera having different pixels from the camera 121. For example, the camera 121 may have a low pixel so that the face of the user can be photographed and transmitted to the other party in case of a video call or the like, and the camera 121 ' It is preferable to have a large number of pixels. The cameras 121 and 121 'may be installed in the terminal body so as to be rotatable or pop-upable.

A flash 123 and a mirror 124 are additionally disposed adjacent to the camera 121 '. The flash 123 illuminates the subject when the subject is photographed by the camera 121 '. The mirror 124 allows the user to illuminate the user's own face or the like when the user intends to shoot himself / herself (self-photographing) using the camera 121 '.

An acoustic output 152 'may be additionally disposed on the rear surface of the terminal body. The sound output unit 152 'may implement the stereo function together with the sound output unit 152 (see FIG. 2A), and may be used for the implementation of the speakerphone mode during a call.

In addition to the antenna for a call or the like, a broadcast signal reception antenna 124 may be additionally disposed on the side of the terminal body. The antenna 124, which forms part of the broadcast receiving module 111 (see FIG. 3), can be installed to be able to be taken out from the terminal body.

A power supply unit 190 for supplying power to the portable terminal 100 is mounted on the terminal body. The power supply unit 190 may be built in the terminal body or may be detachable from the outside of the terminal body.

The rear case 102 may further include a touch pad 135 for sensing a touch. The touch pad 135 may also be of a light transmission type like the display unit 151. [ In this case, if the display unit 151 is configured to output time information on both sides, the time information can be recognized through the touch pad 135 as well. The information output on both sides may be all controlled by the touch pad 135. [ Alternatively, a display may be additionally mounted on the touch pad 135, and a touch screen may be disposed on the rear case 102.

The touch pad 135 operates in correlation with the display portion 151 of the front case 101. The touch pad 135 may be disposed parallel to the rear of the display unit 151. The touch pad 135 may have a size equal to or smaller than that of the display unit 151.

Hereinabove, the general operation and functions of the mobile terminal 100 having the antenna according to the embodiment of the present invention have been described with reference to FIG. 1 to FIG. 2B. Hereinafter, an antenna structure of a mobile terminal 100 including a first radiator on a printed circuit board and an antenna carrier supporting at least one radiator coupled with the first radiator will be described in detail.

The first radiator may be implemented in an outer layer of a printed circuit board, or may be implemented in an inner layer of the printed circuit board. 3A to 3D illustrate an antenna structure in which a first radiator is implemented in an outer layer of a printed circuit board, and FIGS. 4A to 4D illustrate an antenna structure in which a first radiator is implemented in an outer layer of a printed circuit board do. The structure of the dual antenna having the first radiator in the outer layer of the printed circuit board and the multiband characteristics in the upper and lower surfaces of the printed circuit board will be described with reference to FIG.

FIG. 3A is a cross-sectional view taken along the line A-A 'of the mobile terminal shown in FIG. 2A, illustrating a vertical structure of a mobile terminal antenna apparatus according to an embodiment of the present invention.

3A, an antenna device 200 of a mobile terminal 100 according to an embodiment of the present invention includes a printed circuit board 210, a first radiator 220 mounted on a top surface of a printed circuit board, And an antenna carrier 250 that supports at least one radiator that is spaced apart and coupled to the radiator 220.

The antenna device 200 of the mobile terminal 100 according to the embodiment is installed inside the mobile terminal housing composed of the first housing 101 (the front case) and the second housing 102 (the rear case) of the mobile terminal 100 . Here, a conductive ground (not shown) may be formed on the inner surface of the housing of the mobile terminal 100 to shield electromagnetic waves and serve as a ground. The ground may be coated with EMI (Electromagnetic Interference) paint.

In the mobile terminal housing, a printed circuit board 210 mounting RF components for processing a radio signal and an antenna device 200 for radiating or receiving a radio signal are provided. The antenna device 200 may be disposed on one side of the printed circuit board 210 and may include an antenna carrier 250 for supporting the conductive antenna radiators uniformly with respect to the printed circuit board 210.

The printed circuit board 210 is composed of a substrate body 210 having a top surface 212_a and a bottom surface 212_b and the printed circuit board 210 is divided into a ground region 211 and a non- . An antenna device 200 for transmitting and receiving a frequency of a predetermined frequency band is installed in the non-ground region 212 of the printed circuit board 100 and various circuit components necessary for the mobile terminal 100 can be mounted . The antenna device 200 may be disposed in the ground area 211 of the printed circuit board 210 to reduce deterioration of antenna radiation performance.

Meanwhile, a plurality of main chips for performing radio frequency (RF) components and predetermined arithmetic functions may be disposed in the ground area 211 of the printed circuit board 210. The ground region 211 forms a ground pattern, and the ground pattern is connected to the ground of the printed circuit board 210. In addition, the ground patterns are patterned on the printed circuit board 210 so as to divide the RF parts. In addition, the RF components and various chips may be mounted on the printed circuit board 100 so as to protrude at a predetermined height.

The RF component may include an RF transceiver 300. The RF transmitting and receiving unit 300 is connected to the antenna device 200 through the RF transmitting unit 310 on the printed circuit board 210 and the feeding line 310 transmits the RF signal to the first radiating device 200 .

The first radiator 220 may be implemented on the upper surface 212_a of the printed circuit board 100. The first RF radiator 220 formed on the upper surface 212_a of the printed circuit board 100 may be defined as a part of the antenna pattern and RF signals of the RF transmitter 300 may be transmitted to the RF transmitter 310, To the first radiator (220). The first radiator 220 is coupled to at least one radiator, which is vertically spaced apart from the first radiator 200 by a predetermined distance.

Here, the first radiator 200 receives a predetermined RF signal through the RF transmitter 310, extends the RF transmitter 310 to have the same area as that of the first radiator, . In this case, the antenna device 200 may mean at least one radiator coupled with the first radiator 210.

The antenna carrier 250 stably supports at least one radiator (e.g., the second radiator 230) coupled to the first radiator 220. The antenna carrier 250 is preferably formed of a material such as resin or ceramics so as not to affect the radiation characteristics of the at least one radiators.

At least one radiator supported by the antenna carrier 250 is coupled to the first radiator 220 on the printed circuit board 210 such that the radiators coupled with the first radiator 220 are of a predetermined thickness and pattern area . The degree of coupling varies depending on the thickness of the radiators to be coupled and the pattern area, thereby ensuring the performance of the antenna.

3B is a plan view illustrating a structure of a printed circuit board in a mobile terminal having the antenna shown in FIG. 3A. FIG. 3C is a plan view illustrating a structure of a printed circuit board of a mobile terminal having an antenna using a feeding part as a radiator in FIG. Fig.

Referring to FIG. 3B, the first radiator 220 may be formed on the upper surface 210_a of the non-ground region 211 of the printed circuit board 210. FIG. Here, the feeding unit may transmit the RF signal transmitted from the RF transmitting / receiving unit 300 to the first radiator 220, and may directly use the feeding unit as the first radiator 210.

The RF transceiver 300 includes at least one frequency variable circuit 351, 353, and 355 for varying a frequency characteristic of a path through which an RF signal is transmitted from the first radiator 220 to the first radiator 220, thereby realizing multiple frequency characteristics. The frequency variable circuits 351, 353, and 355 may be implemented with at least one of a microstrip, a strip line, and an LC.

Referring to FIG. 3C, the first radiator 220 receiving the RF signal by enlarging the area of the feeding part 220_1 may be replaced with the first radiator 220 as shown in FIG. 3C.

FIG. 3D is a plan view showing the antenna structure of the mobile terminal shown in FIG. 3A.

Referring to FIG. 3D, an antenna according to one embodiment may include a first radiator 220, at least one radiator coupled to the first radiator 220 and supported by the antenna carrier 250. The radiator supported by the antenna carrier 250 may include a second radiator 230 and a third radiator 240 as shown in FIG. 3D.

The first radiator 220 is formed on the upper surface of the printed circuit board 220. The first radiator 220 is formed in one region of the printed circuit board 210 so that an RF source provided in the ground region of the printed circuit board 210 is connected to the antenna disposed in the non- (The second radiator, the third radiator).

The second radiator 230 is supported by the antenna carrier 250 and is spaced apart from the first radiator 220 by a predetermined distance to couple with a portion 225 of the first radiator 220. The second radiator 230 extends from one end coupled to the first radiator 220 and is formed in a 'C' shape. The thickness of the second radiator 230 may be greater than the thickness W1 of the coupling region and the thickness W2 of the extending pattern. The area 225 where the first and second radiators 220 and 230 are coupled may be variously modified in consideration of a frequency condition in which the mobile terminal 100 can operate in a predetermined band. have.

The third radiator 240 is supported by the antenna carrier 250 in the same manner as the second radiator 230 and is spaced from the first radiator 220 in a direction perpendicular to the first radiator 220, Lt; / RTI > The area 235 where the third radiator 240 is coupled with the first radiator 220 is smaller than the area 225 where the second radiator 230 is coupled with the first radiator 220. The third radiator 240 extends from one end coupled with the first radiator 220 and is formed in a 'C' shape. The area where the first radiator 220 and the third radiator 240 are coupled may also be variously modified as described above. Meanwhile, although not shown, the third radiator 240 may be coupled with the second radiator 230 as well as the first radiator 220 to emit an RF signal.

Meanwhile, the second and third radiators 230 and 240 may be tuned to different antenna distances from the first radiator 220, respectively. The second radiator 230 and the third radiator 240 may be formed of a metal material having excellent conductivity such as copper (Cu), an alloy of copper (Cu) and nickel (Ni), or the like.

The second radiator 230 and the third radiator 240 form grounds 321 and 331, respectively, with the inner surface of the housing of the mobile terminal 100 as a ground.

The second radiator 230 and the third radiator 240 shown in FIG. 3D may have a length that can be operated in one or more of the various bands for mobile communication, for example,? / 2 or? / 4 (? : Wavelength), or the like. The second radiator 230 and the third radiator 240 may additionally have a stub or a pattern for a higher band vertically attached to the main strip.

3A through 3D, the first radiator 220 is designed on the upper surface 210_a of the printed circuit board so that at least one of the second antenna 230 and the third antenna 240 is formed on the upper surface 210_a of the printed circuit board, 1 radiator 220 to radiate an RF signal.

The first radiator 220 is embedded in the printed circuit board 210 so that the first radiator 220 is coupled to the feeding portion 227 designed on the upper surface 210_a of the printed circuit board And an antenna structure for transmitting an RF signal to at least one of the second antenna 230 and the third antenna 240 through the feeding unit 227 will be described with reference to FIGS. Items which are the same as those in FIGS. 3A to 3D will be omitted in the following description.

4A is a cross-sectional view taken along the line A-A 'of the mobile terminal shown in FIG. 2A according to another embodiment of the present invention, and shows an example of a vertical structure of a mobile terminal having an antenna.

Referring to FIG. 4A, the first radiator 220 is embedded in a printed circuit board 210. An RF transmitter 310 for transmitting an RF signal from the RF transceiver 300 existing in the ground area 212 of the printed circuit board to the first radiator 220 is also embedded in the printed circuit board 210. The first radiator 220 transmits an RF signal to a feeding part 227 present on the upper surface 210_a of the printed circuit board by a coupling method. In this case, the first radiator 220 may be formed as a strip line, for example. The coupling generated between the first radiator 220 and the feeding portion 227 may be a coupling area, Can be adjusted according to the distance between the first radiator 220 and the feeding portion 227.

The feeding portion 227 is designed on the upper surface 210_a of the printed circuit board corresponding to the first radiator 220 in the vertical direction. The feeding unit 227 is coupled to the first radiator 220 embedded in the printed circuit board 210 to receive the RF signal and transmits the RF signal to the second radiator 230 through the antenna connection unit 245. [ .

A finger or a clip may be used as the antenna connection part 245 connecting the feeding part 227 and the second radiator 230, The antenna connection portion 245 may be designed to have a number of radiators coupled to the feeding portion 227. [

The vertical structure of the mobile terminal antenna shown in FIG. 4A is designed not to have the first radiator 220 separately as a separate antenna module but to be built in a printed circuit board (PCB) Can be included in the PCB fabrication to reduce the manufacturing cost of the antenna and improve the performance characteristics of the antenna.

4B shows a structure of a printed circuit board in a mobile terminal having an antenna shown in FIG. 4A, FIG. 4C shows a state in which a feeding part is implemented in an outer layer of a printed circuit board in FIG. 4B, Is a plan view showing the antenna structure of the mobile terminal shown in FIG. 4A.

Referring to FIG. 4B, the first radiator 220 is fabricated by embedding the first radiator 220 when the printed circuit board 210 is manufactured. The first radiator 220 may be formed of at least one layer of the printed circuit board 210.

4C, when the first radiator 220 is built in the printed circuit board 210, the upper surface 210_a of the printed circuit board 210 is perpendicular to the first radiator 220 And the feeding part 227 is disposed at a position corresponding to the feeding part 227.

Meanwhile, the antenna pattern shown in FIG. 4D is the same as the antenna pattern shown in FIG. 3D. However, unlike in FIG. 3D, the second radiator 230 and the third radiator 240 radiate RF signals from the radiating part 227 using the antenna connection part 245. At this time, the secondary radiator 230 receives and radiates RF signals directly from the feeding unit 227. In the case of the third radiating element 240, the RF signal may be input directly from the feeding section 227, but the RF signal may be received and radiated through the coupling method with the second radiating element 230.

4D, the first radiator 220 and the feeding portion 227 designed on the printed circuit board 210 may be included in the antenna pattern. However, except for the structure designed on the printed circuit board 210, Only the radiator 230 and the third radiator 240 can be seen as antenna patterns.

The second radiator 230 and the third radiator 240 may be in contact with the ground area of the inner surface of the housing of the mobile terminal 100 to form the grounds 321 and 331, respectively. Here, the ground 331 formed by the third radiator 240 contacting the inner surface of the housing of the mobile terminal 100 can be selectively configured. For example, in order to realize a low frequency band of a wide band, a ground 331 by the third radiator 240 may be used. The ground structure may form a fixed ground through a screw, welding, or the like, but it may form a ground structure by a contact method capable of forming a ground through an elastic material or assembly.

3A through 4D illustrate the structure of the internal antenna of the mobile terminal 100 in such a manner that the first radiator 220 is embedded in the printed circuit board 210, And the case where it is designed on the upper surface has been described. That is, the antenna structure described with reference to FIGS. 3A through 4D has a structure in which an RF signal transmitted from one RF transmitting and receiving unit is radiated through one antenna module including a plurality of radiators.

Hereinafter, a structure of a dual antenna that implements multiband characteristics by designing the first antenna pattern and the second antenna pattern with respect to the upper surface and the lower surface of the printed circuit board will be described with reference to FIG.

5 is a diagram illustrating an example of a vertical structure of a mobile terminal having an antenna according to an embodiment of the present invention.

Referring to FIG. 5, the printed circuit board 210 is designed inside a mobile terminal housing composed of a first housing 101 (front case) and a second housing 102 (rear case). A first antenna pattern 510 is disposed on the rear case 102 side and a second antenna pattern 520 is disposed on the front case 101 side.

The first antenna pattern 510 includes a first feeding part 511 designed on the outer surface of the printed circuit board corresponding to the rear case 102 side and a second feeding part 511 extending in a direction perpendicular to the first feeding part 511 And an antenna pattern 512 that is formed on the substrate. In this case, the space of the rear case 102 in the inside of the housing of the mobile terminal 100 is narrow and somewhat distant from the ground region. Accordingly, the first antenna pattern 510 may be a low-band antenna using a monopole type.

The second antenna pattern 520 is formed on the opposite side of the first antenna pattern 510 and includes a second feeding part 521 designed on the outer surface of the printed circuit board corresponding to the front case 101, And an antenna pattern 522 extending in a direction perpendicular to the first feeding part 521. Generally, since the area of the front case 101 is surrounded by the ground area in the housing of the mobile terminal 100, the second antenna pattern is formed by using a planar inverted-F antenna (PIFA) Can be implemented.

The RF transmitting and receiving unit 300 is designed in the ground area 211 of the printed circuit board and transmits RF signals to the first antenna pattern 510 and the second antenna pattern 520 through the RF transmitting unit 310. The RF transmitter 310 transmits the RF signal transmitted from the RF transmitter 300 to the first antenna pattern 510 through the first RF transmitter 311 and transmits the RF signal to the second RF transmitter 312 To the second antenna pattern (520). The first RF transmitter 311 and the second RF transmitter 312 are respectively provided from an RF transmitter 310 connected to the RF transmitter 300.

At least one frequency variable circuit 351, 353 and 355 may be disposed between the RF transceiver 300 and the first feeding part 511 and the second feeding part 521. [ The at least one frequency variable circuit 351, 353, and 355 may vary the frequency characteristics transmitted to the first feeding unit 511 and the second feeding unit 521 to implement an antenna having a frequency characteristic of multiple bands . The at least one variable frequency circuit may use at least one of a microstrip, a strip line, and an LC.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative and not restrictive in all instances. The scope of the present invention should be construed as being included in the scope of the claims rather than the detailed description.

100: mobile terminal 101: rear case
102: front case 210: printed circuit board (PCB)
210_a: upper surface of printed circuit board 210_b: lower surface of printed circuit board
211: PCB ground area 212: PCB non-ground area
220: first radiator 227:
230: second radiator 240: third radiator
250: antenna carrier 300: RF transmitting /
310: RF transmission unit

Claims (10)

A printed circuit board inside the mobile terminal housing;
A first radiator formed on the printed circuit board and receiving an RF signal from the RF transceiver unit and radiating an electromagnetic wave; And
And an antenna carrier formed on an upper surface of the first radiator and supporting at least one radiator fixed to an inner side of the mobile terminal housing and spaced apart from and coupled to the first radiator by a predetermined distance,
The antenna carrier
A first radiator formed on the upper surface of the first radiator and including a resin or a ceramics material,
The radiator includes:
A second radiator spaced apart from and vertically spaced from the first radiator by a predetermined distance; And
And a third radiator spaced apart from the first radiator by a predetermined distance in a vertical direction and coupled to the first radiator or the second radiator. The antenna according to claim 1,
Wherein the antenna is formed on an upper surface of the printed circuit board. delete The antenna according to claim 1,
And the antenna is embedded in the printed circuit board. 5. The method of claim 4,
A feeding unit formed on an upper surface of the printed circuit board and coupled with the first radiator; And
Further comprising an antenna connection portion connecting at least one radiator provided in the antenna carrier and the feeding portion,
Wherein the feeding unit transmits RF signals received from the first radiator in a coupling manner to at least one radiator provided in the antenna carrier. 6. The method of claim 5,
Wherein the antenna carrier is formed at a predetermined distance from an upper portion of the feeding portion,
The radiator supported by the antenna carrier,
A second radiator directly coupled to the feeding unit through the antenna connection unit; And
A third radiator coupled directly to the feeding section via the antenna connection, or coupled to the second radiator,
And an antenna for a mobile terminal. The method according to claim 1,
And at least one frequency variable circuit provided between the RF transceiver and the first radiator for varying the frequency characteristic transferred to the first radiator in consideration of the frequency characteristics of the multi-
Wherein the at least one variable frequency circuit comprises at least one of a microstrip, a strip line, and an LC. delete delete delete

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