KR20120034323A - Antenna for portable terminal - Google Patents

Abstract

PURPOSE: An antenna for a mobile terminal is provided to reduce manufacturing costs of the antenna by embedding a first radiator to a printed circuit board. CONSTITUTION: A first radiator(220) is formed on the upper side of a printed circuit board(210). An antenna carrier(250) which supports at least one radiator is coupled with the first radiator with a preset interval. The antenna device of the movable terminal is formed in a movable terminal housing comprising a first housing(101) and a second housing(102). A ground with conductivity is formed in the inner side of the housing of the movable terminal. The antenna device is arranged on one side of the printed circuit board. The printed circuit board has a substrate body with an upper surface and a lower surface and is divided into a ground area(211) and a non-ground area(212).

Description

Antenna for mobile terminal {ANTENNA FOR PORTABLE TERMINAL}

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

Recently, portable terminals are equipped with various services and applications such as portable Internet, video call, multimedia file playback, etc. in addition to voice call-oriented functions. In addition, portable terminals are becoming smaller, lighter, and slimmer to satisfy various needs of users such as ease of use, portability, and appearance.

As such, various design techniques for wireless communication antennas are required to improve the usability of the portable terminal and to miniaturize and slim the portable terminal.

SUMMARY OF THE INVENTION An object of the present invention is to provide an antenna for a mobile terminal which can reduce the manufacturing cost of the antenna and can slim down a portable terminal while improving the performance characteristics of the antenna.

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

According to an aspect of the present invention, a mobile terminal may include 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 to receive the RF signal from the RF transceiver and radiate electromagnetic waves. The antenna carrier is fixed to one side of the mobile terminal housing so as to be spaced apart from the printed circuit board by a predetermined distance, and supports at least one radiator coupled to the first radiator and spaced apart from each other.

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

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

According to another aspect of the present invention, a mobile terminal includes a printed circuit board inside a mobile terminal housing; Spaced apart from the first antenna pattern coupled to the first feeding portion formed on the upper surface of the printed circuit board on the rear housing side and the second feeding portion formed on the lower surface of the printed circuit board on the front housing side. And a second antenna pattern coupled thereto, wherein the RF transmitting unit is divided into a first feeding unit and a second feeding unit to transmit RF signals 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 an 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 outer surface of the printed circuit board.

In addition, according to the present invention, the mobile terminal can be slimmed to improve the usability of the mobile terminal.

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

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and those skilled in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims.

The mobile terminal described herein may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, and the like.

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 A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, and an interface. The unit 170, the controller 180, and the power supply unit 190 may be included. 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 that enable wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and a 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 mean a server that generates and transmits a broadcast signal and / or broadcast related information or a server that receives a previously generated broadcast signal and / or broadcast related information and transmits the same to a terminal. The broadcast signal may include not only a TV broadcast signal, a radio broadcast signal, and a data broadcast signal, but also a broadcast signal having a data broadcast signal combined with a TV broadcast signal or a radio broadcast signal.

The broadcast related information may mean information related to a broadcast channel, a broadcast program, or 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, it may exist in the form of Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB) or Electronic Service Guide (ESG) of Digital Video BroadcastHandheld (DVBH).

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 a wireless signal with 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 according to transmission and reception of a voice call signal, a video call call signal, or a text / multimedia message.

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. As a short range communication technology, Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like may be used.

The location information module 115 is a module for confirming or obtaining the location of the mobile terminal. A representative 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. Furthermore, 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 may continuously calculate the current position in real time and use the same to calculate speed information.

Referring to FIG. 1, the A / V 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 call 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 by a microphone in a call mode, a recording mode, a voice recognition mode, etc., and processes the external sound signal into 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. The microphone 122 may implement various noise removing algorithms for removing noise generated in the process of receiving an external sound signal.

The user input unit 130 generates input data for the 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 detects a current state of the mobile terminal 100 such as an open / closed state of the mobile terminal 100, a location of the mobile terminal 100, presence or absence of a user contact, orientation of the mobile terminal, acceleration / deceleration of the mobile terminal, and the like. To generate 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, it may be responsible for sensing functions related to whether the power supply unit 190 is supplied with power, whether the interface unit 170 is coupled 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 a call mode, the mobile terminal 100 displays a user interface (UI) or a graphic user interface (GUI) related to the call. When the mobile terminal 100 is in a video call mode or a photographing mode, the mobile terminal 100 displays photographed and / or received images, a UI, and a GUI.

The display module 151 is a liquid crystal display, a thin film transistor liquid crystal display, an organic light emitting diode, a flexible display, or a 3D display. It may include at least one.

Some of these displays can be configured to be transparent or light transmissive so that they can be seen from the outside. This may be referred to as a transparent display. A representative example of the transparent display is a transparent LCD. The rear structure of the display module 151 may also be of a light transmission type. With this structure, the user can see the 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 implementation form 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, for example, a form of a touch film, a touch sheet, a touch pad, or the like.

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

When the touch screen is capacitive, the touch screen is configured to detect the proximity of the pointer by the change of the electric field according to the proximity of the pointer. 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 proximity touch is performed by the pointer on the touch screen refers to a position where the pointer is perpendicular to the touch screen when the pointer is in proximity proximity.

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 sensed proximity touch operation and 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 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 sound output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying occurrence of an event of the mobile terminal 100. Examples of events occurring in the mobile terminal include call signal reception, message reception, key signal input, and touch input. The alarm unit 153 may output a signal for notifying occurrence of an event in a form other than a video signal or an 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. Vibration is a representative example of the haptic effect generated by the haptic module 154. The intensity and pattern of vibration generated by the haptic module 154 can be controlled. For example, different vibrations may be synthesized and output or may be sequentially output.

In addition to the vibration, the haptic module 154 may be used for the effects of stimulation by the arrangement of pins vertically moving with respect to the contact skin surface, the effect of the injection force of the air through the injection or inlet or the stimulation through the suction force, and the stimulation that rubs the skin surface. Various tactile effects may be generated, such as effects by stimulation through contact of electrodes, effects by stimulation using electrostatic force, and effects of reproducing a sense of warmth and heat using an endothermic or heat generating element.

The haptic module 154 may not only deliver the haptic effect through direct contact, but also implement the haptic effect through the muscle sense of the user's finger or arm. Two or more haptic modules 154 may be provided according to a configuration aspect of the mobile terminal 100.

The memory 160 may store a program for the operation of the controller 180 and may temporarily store input / output data (for example, a phone book, a message, a still image, a video, etc.). The memory 160 may store data relating to various patterns of vibration and sound output when a touch input on the touch screen is performed.

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 connection with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path 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 that stores various types of information for authenticating the use authority of the mobile terminal 100, and includes a user identification module (UIM), a subscriber identify module (SIM), and a universal user authentication module. (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.

The interface unit may be a passage through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, or various command signals input from the cradle by a user may be moved. It may be a passage that is delivered to the terminal. Various command signals or power input from the cradle may be operated as signals 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, perform related control and processing for voice calls, data communications, video calls, and the like. The controller 180 may include a multimedia module 181 for playing multimedia. The multimedia module 181 may be implemented in the controller 180 or may be implemented separately from the controller 180.

The controller 180 may perform a pattern recognition process for recognizing a writing input or a drawing input performed on the touch screen as text and an image, respectively.

The power supply unit 190 receives an external power source and an internal power source under the control of the controller 180 to supply power for operation of each component.

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

The disclosed portable terminal 100 has a terminal body in the form of a bar. However, the present invention is not limited thereto and may be applied to various structures such as a slide type, a folder type, a swing type, a swivel type, and two or more bodies are coupled to be relatively movable.

The body includes a casing (casing, housing, cover, etc.) that forms an exterior. In this embodiment, the case may be divided into a front case 101 and a rear case 102. Various electronic components are built 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 injecting synthetic resin or may be formed of a metal material, for example, a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 151, the audio output unit 152, the camera 121, the user input units 130/131 and 132, the microphone 122, and the interface 170 may be disposed in the terminal body, mainly the front case 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 manipulated 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 manipulation units 131 and 132 may also be collectively referred to as manipulating portions, and may be employed in any manner as long as the user operates the tactile manner with a tactile feeling.

The content input by the first or second manipulation 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 additionally mounted on the rear 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 has a low pixel so that the user's face is photographed and transmitted to the counterpart in case of a video call, and the camera 121 'photographs a general subject and does not transmit it immediately. It is desirable to have a high pixel because there are many. 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 further disposed adjacent to the camera 121 '. The flash 123 shines light toward the subject when the subject is photographed by the camera 121 '. The mirror 124 allows the user to see his / her own face or the like when photographing (self-photographing) the user using the camera 121 '.

The sound output unit 152 'may be further disposed on the rear surface of the terminal body. The sound output unit 152 ′ may implement a stereo function together with the sound output unit 152 (see FIG. 2A), and may be used to implement a 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 constituting a part of the broadcast receiving module 111 (see FIG. 3) may be installed to be pulled out of 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 embedded in the terminal body or may be directly detachable from the outside of the terminal body.

The rear case 102 may be further equipped with a touch pad 135 for sensing a touch. Like the display unit 151, the touch pad 135 may also be configured to have a light transmission type. In this case, if the display unit 151 is configured to output visual information from both sides, the visual information may be recognized through the touch pad 135. The information output on both surfaces may be 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 association with the display unit 151 of the front case 101. The touch pad 135 may be disposed in parallel to the rear of the display unit 151. The touch pad 135 may have the same or smaller size as the display unit 151.

In the above, the general operation and function of the mobile terminal 100 having the antenna according to the embodiment of the present invention have been described with reference to FIGS. Hereinafter, the antenna structure of the mobile terminal 100 including the antenna carrier supporting the at least one radiator coupled to the first radiator and implementing the first radiator on the printed circuit board will be described in detail.

The first radiator may be implemented on an outer layer of the printed circuit board, or may be implemented on an inner layer of the printed circuit board. An antenna structure in which the first radiator is implemented on the outer layer of the printed circuit board will be described with reference to FIGS. 3A to 3D, and an antenna structure in which the first radiator is implemented in the outer layer of the printed circuit board will be described through FIGS. 4A to 4D. do. In addition, the first radiator is implemented on the outer layer of the printed circuit board, the structure of a dual antenna having a multi-band characteristics, respectively implemented on the upper and lower surfaces of the printed circuit board will be described with reference to FIG.

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

Referring to FIG. 3A, an antenna device 200 of a mobile terminal 100 according to an embodiment of the present invention may include a printed circuit board 210, a first radiator 220, and a first radiator 220 formed on an upper surface of the printed circuit board. The radiator 220 may include an antenna carrier 250 supporting at least one radiator coupled to the radiator 220 at a predetermined interval.

The antenna device 200 of the mobile terminal 100 according to an embodiment includes a first housing 101 (front case) and a second housing 102 (rear case) of the mobile terminal 100. It may be provided. Here, a ground (not shown) having conductivity to serve as an electromagnetic shielding and ground may be formed on the inner surface of the housing of the mobile terminal 100. The ground may be coated with an electromagnetic interference (EMI) paint.

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

The printed circuit board 210 includes a substrate body 210 having an upper surface 212_a and a lower surface 212_b, and the printed circuit board 210 is divided into a ground area 211 and a non-ground area 212. Can be. In the non-ground area 212 of the printed circuit board 100, an antenna device 200 for transmitting and receiving a frequency of a predetermined band, in particular, a built-in antenna may be installed, and various circuit components necessary for the mobile terminal 100 may be mounted. . The antenna device 200 may be disposed in the ground area 211 of the printed circuit board 210 to reduce the degradation of the antenna radiation performance.

On the other hand, in the ground area 211 of the printed circuit board 210, RF (Radio Frequency) components and a plurality of main chips for performing a predetermined calculation function may be disposed. 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 partition between the RF components. In addition, the RF components and various chips may be mounted to protrude at a predetermined height on the printed circuit board 100.

The RF component may include an RF transceiver 300. The RF transceiver 300 is connected to the antenna device 200 through the RF transmitter 310 on the printed circuit board 210, the feeding line 310 transmits the RF signal to the first radiator 200. .

The first radiator 220 may be implemented on the upper surface 212_a of the printed circuit board 100. In the present invention, the first radiator 220 formed on the upper surface 212_a of the printed circuit board 100 may be defined as part of an antenna pattern, and the RF signal of the RF transceiver 300 is an RF transmitter 310. It is transmitted to the first radiator 220 through. The first radiator 220 transmits the transmitted RF signal to at least one radiator spaced apart from the first radiator 200 in a vertical direction by a predetermined distance through a coupling method.

Here, although the first radiator 200 receives a predetermined RF signal through the RF transmitting unit 310, the first radiator 200 extends with the RF transmitting unit 310 so that the area thereof is the same as that of the first radiator, thereby feeding the feeding unit itself to the first radiator. Can be used as In this case, the antenna device 200 may mean at least one radiator coupled to the first radiator 210.

The antenna carrier 250 stably supports at least one radiator (eg, 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 radiator.

At least one radiator supported by the antenna carrier 250 is coupled to the first radiator 220 on the printed circuit board 210, and the radiators coupled to the first radiator 220 may have a predetermined thickness and pattern area. Holds. The degree of coupling is varied according to the thickness and pattern area of the radiators to be coupled to ensure the performance of the antenna.

3B is a plan view illustrating a structure of a printed circuit board in the mobile terminal having the antenna illustrated in FIG. 3A, and FIG. 3C is a structure of a printed circuit board of the mobile terminal having an antenna using a feeding unit as a radiator in FIG. 3B. It is a top view showing the.

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

In addition, at least one frequency variable circuit 351, 353, 355 for varying the frequency characteristic on the path through which the RF signal is transmitted from the RF transceiver 300 to the first radiator 220 may be configured to implement a multi-frequency characteristic. The frequency variable circuits 351, 353, and 355 may be implemented by at least one of a microstrip, a strip line, and an LC.

Referring to FIG. 3C, the area of the feeding unit 220_1 may be enlarged to replace the first radiator 220 receiving the RF signal with the first radiator 220 as illustrated in FIG. 3C.

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

Referring to FIG. 3D, the antenna according to an embodiment may include a first radiator 220 and 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. By forming the first radiator 220 in one region of the printed circuit board 210, an RF source installed in the ground region of the printed circuit board 210 is installed in the non-ground region of the printed circuit board 210. It can be more easily transmitted to the pattern (second radiator, third radiator).

The second radiator 230 is supported by the antenna carrier 250 and is spaced apart from the first radiator 220 in a vertical direction at a predetermined interval and coupled to the partial region 225 of the first radiator 220. The second radiator 230 extends from one end coupled with the first radiator 220 to have a '-' 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 in which the first radiator 220 and the second radiator 230 are coupled may be variously modified in consideration of frequency conditions in which the mobile terminal 100 may operate in a predetermined band. have.

Like the second radiator 230, the third radiator 240 is supported by the antenna carrier 250, and is spaced apart from the first radiator 220 in a vertical direction at a predetermined interval 235 to form a partial region 235 of the first radiator 220. ) Is coupled. The region 235 in which the third radiator 240 is coupled with the first radiator 220 is smaller than the region 225 in which 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 to have a 'B' shape. The area in which the first radiator 220 and the third radiator 240 are coupled may also be variously modified as described above. Although not shown, the third radiator 240 may be coupled to the second radiator 230 as well as the first radiator 220 to radiate an RF signal.

Meanwhile, the second radiator 230 and the third radiator 240 may tune antenna performance by varying the separation distance from the first radiator 220. In addition, the second radiator 230 and the third radiator 240 may be formed using a metal material having excellent conductivity such as copper (Cu) or an alloy such as copper (Cu) and nickel (Ni).

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

The second radiator 230 and the third radiator 240 shown in FIG. 3D are lengths that can be operated in one or more of the various bands for mobile communication, for example [lambda] / 2 or [lambda] / 4 ([lambda]). It may be formed to have a length such as (wavelength). In addition, the second radiator 230 and the third radiator 240 may additionally have a stub or a pattern for a higher band added perpendicular to the main strip.

3A to 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 as the first radiator 220. 1 has been described with an antenna structure coupled to the radiator 220 to radiate an RF signal.

Hereinafter, the first radiator 220 is embedded in the printed circuit board 210 so that the first radiator 220 is coupled to the feeding part 227 designed on the upper surface 210_a of the printed circuit board. The antenna structure for transmitting the 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. 4A to 4D. In the meantime, matters overlapping with the description of FIGS. 3A to 3D will be omitted below.

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

Referring to FIG. 4A, the first radiator 220 is embedded in the printed circuit board 210. An RF transmitter 310 for transmitting an RF signal from the RF transceiver 300 in the ground region 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 the feeding unit 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, for example, a strip line, and the coupling generated between the first radiator 220 and the feeding unit 227 may include an area to be coupled to, The distance between the first radiator 220 and the feeding unit 227 may be adjusted.

The feeding part 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 an RF signal, and the input RF signal is transmitted to the second radiator 230 through the antenna connection unit 245. To pass on.

The feeding unit 227 may be implemented as a microstrip line. Here, the antenna connection unit 245 connecting the feeding unit 227 and the second radiator 230 may include a finger or a clip. The antenna connector 245 may be designed to have as many radiators coupled to the feeding unit 227.

The vertical structure of the mobile terminal antenna illustrated in FIG. 4A is not a form in which the first radiator 220 is separately present as a separate antenna module, but is designed to be embedded in a printed circuit board (PCB), thereby adding an existing cost to the antenna. It can be included in the PCB fabrication to reduce antenna fabrication cost and improve the antenna's performance characteristics.

4B illustrates a structure of a printed circuit board in the mobile terminal having the antenna illustrated in FIG. 4A, and FIG. 4C illustrates a state in which a feeding unit is implemented on an outer layer of the printed circuit board in FIG. 4B, and FIG. 4D. Is a plan view illustrating the antenna structure of the mobile terminal shown in FIG. 4A.

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

In addition, when the first radiator 220 is embedded in the printed circuit board 210 and fabrication is completed, as shown in FIG. 4C, the first radiator 220 is perpendicular to the first radiator 220 of the upper surface 210_a of the printed circuit board. The feeding unit 227 is arranged at a position corresponding to the design.

Meanwhile, the antenna pattern shown in FIG. 4D is the same as the antenna pattern shown in FIG. 3D. However, unlike FIG. 3D, the second radiator 230 and the third radiator 240 radiate an RF signal from the feeding unit 227 using the antenna connection unit 245. At this time, the secondary radiator 230 receives the RF signal directly from the feeding unit 227 to radiate. In the case of the tertiary radiator 240, the RF signal may be directly input from the feeding unit 227, but may be radiated by receiving the RF signal through a coupling method with the secondary radiator 230.

As shown in FIG. 4D, the first radiator 220 and the feeding unit 227 designed to the printed circuit board 210 may be included in the antenna pattern, except for the configuration designed to the printed circuit board 210. Only the radiator 230 and the third radiator 240 may be viewed as an antenna pattern.

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

3A to 4D, in the structure of the internal antenna of the mobile terminal 100, the first radiator 220 is embedded in the printed circuit board 210 or the printed circuit board 210 of the built-in antenna. The case where it is designed on the upper surface was demonstrated. That is, the antenna structure described with reference to FIGS. 3A to 4D has described a structure in which an RF signal transmitted from one RF transceiver is radiated through one antenna module including a plurality of radiators.

Hereinafter, the first antenna pattern and the second antenna pattern are designed for each of the upper and lower surfaces of the printed circuit board, thereby describing a structure of a dual antenna that implements multi-band characteristics.

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 including a first housing 101 (front case) and a second housing 102 (rear case). The first antenna pattern 510 is disposed on the rear case 102 side, and the second antenna pattern 520 is disposed on the front case 101 side.

The first antenna pattern 510 is formed to extend in a direction perpendicular to the first feeding part 511 and the first feeding part 511 designed on the outer surface of the printed circuit board corresponding to the rear case 102 side. It may be configured to include an antenna pattern 512. In general, the space of the rear case 102 in the inside of the housing of the mobile terminal 100 is narrow and is somewhat separated from the ground area. Therefore, the first antenna pattern 510 may implement 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 the second feeding part 521 is designed on the outer surface of the printed circuit board corresponding to the front case 101 side, and It may be configured to include an antenna pattern 522 extending in the vertical direction with the first feeding unit 521. In general, since the front case 101 is surrounded by a ground area in the housing of the mobile terminal 100, the second antenna pattern is a high band antenna using a Plane Inverted-F Antenna (PIFA). Can be implemented.

The RF transceiver 300 is designed in the ground region 211 of the printed circuit board and transmits an RF signal to the first antenna pattern 510 and the second antenna pattern 520 through the RF transmitter 310. The RF transmitter 310 transmits an RF signal transmitted from the RF transceiver 300 to the first antenna pattern 510 through the first RF transmitter 311 and transmits the second RF transmitter 312. Transfer to the second antenna pattern 520 through. The first RF transmitter 311 and the second RF transmitter 312 are divided from one RF transmitter 310 connected to the RF transceiver 300.

At least one frequency variable circuit 351, 353, 355 may be disposed between the RF transceiver 300, the first feeding unit 511, and the second feeding unit 521. The at least one frequency variable circuit 351, 353, and 355 may implement an antenna having a multi-band frequency characteristic by varying frequency characteristics transmitted to each of the first and second feeding units 511 and 521. . The at least one frequency variable circuit may use at least one of a circuit consisting of a microstrip, a strip line, and an LC.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it is to be understood that the embodiments described above are exemplary in all the specification and not limiting. The scope of the invention should be construed as being included in the claims rather than the foregoing description.

100: mobile terminal 101: rear case
102: front case 210: printed circuit board (PCB)
210_a: upper surface of the printed circuit board 210_b: lower surface of the printed circuit board
211: PCB ground area 212: PCB non-ground area
220: first radiator 227: feeding part
230: second radiator 240: third radiator
250: antenna carrier 300: RF transceiver
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 configured to radiate electromagnetic waves by receiving an RF signal from an RF transceiver; And
An antenna carrier formed on an upper surface of the first radiator and fixed to one inner side of the mobile terminal housing to support at least one radiator spaced apart from and coupled to the first radiator by a predetermined distance;
Antenna for a mobile terminal comprising a. The method of claim 1, wherein the first radiator,
An antenna for a mobile terminal, characterized in that formed on the upper surface of the printed circuit board. The method of claim 2,
The antenna carrier is formed on the upper surface of the first radiator,
The radiator supported by the antenna carrier,
A second radiator coupled to the first radiator and spaced apart from each other in a vertical direction by a predetermined distance; And
A third radiator spaced apart from the first radiator by a predetermined distance in a vertical direction and coupled to any one of the first radiator and the second radiator;
Antenna for a mobile terminal comprising a. The method of claim 1, wherein the first radiator,
The antenna for a mobile terminal, characterized in that embedded in the printed circuit board. The method of claim 4, wherein
A feeding part formed on an upper surface of the printed circuit board and coupled to the first radiator; And
Further comprising an antenna connection for connecting the at least one radiator and the feeding unit provided in the antenna carrier,
The feeding unit is an antenna for a mobile terminal, characterized in that for transmitting the RF signal received by the coupling method from the first radiator to at least one radiator provided in the antenna carrier. The method of claim 5,
The antenna carrier is formed spaced apart from the upper portion of the feeding portion,
The radiator supported by the antenna carrier,
A second radiator coupled directly to the feeding part through the antenna connection part; And
A third radiator coupled directly to the feeding part via the antenna connection part or coupled to the second radiator;
Antenna for a mobile terminal comprising a. The method of claim 1,
At least one frequency varying circuit disposed between the RF transceiver and the first radiator in consideration of the frequency characteristics of the multi-band, and for varying the frequency characteristic transmitted to the first radiator;
The at least one frequency variable circuit includes at least one of a circuit consisting of a microstrip, a strip line, and an LC. A printed circuit board inside a mobile terminal housing equipped with an RF transceiver;
A first antenna pattern extending from the first feeding part formed on the upper surface of the printed circuit board on the rear housing side; And
Including a second antenna pattern extending from the second feeding portion formed on the lower surface of the printed circuit board on the front housing side,
The RF transmission unit extending from the RF transceiver unit is divided into the first feeding unit and the second feeding unit for supplying the RF signal of the RF transceiver unit to the first antenna pattern and the second antenna pattern, respectively. antenna. The method of claim 8,
The first antenna pattern is a antenna for a mobile terminal, characterized in that the monopole antenna. The method of claim 8,
And the second antenna pattern is a planar inverted antenna (PIFA).

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