KR101918986B1 - Terminal - Google Patents

Abstract

A terminal according to an embodiment of the present invention includes a terminal body and a circuit board which is embedded in the body and includes a first antenna element adjacent to the first antenna element and a distributor formed to feed a radio signal to the second antenna element, The antenna can be more efficiently implemented and the performance of the antenna can be maintained, so that the terminal can be further miniaturized.

Description

Terminal {TERMINAL}

One embodiment of the present invention relates to an antenna device mounted on a terminal.

In the past, it was government-led to allocate frequencies for new services or allocate frequencies to new operators.

In particular, if there are new operators, allocate new frequencies through auctions, allocate existing frequencies to existing operators, and reallocate them to other operators.

However, due to the explosion of demand for wireless data traffic due to the spread of various wireless Internet-based applications such as open terminal platform, app store, and mobile VoIP, the government-led frequency allocation is very inefficient, and fundamentally, Securing it gradually became difficult.

In particular, with the rapid growth of broadcasting and communication systems, the next generation communication system is designed in the form of convergence of various networks, the system becomes more complicated, and the necessity of interworking is gradually expanded. In addition, frequency of use of frequency resources increases as communication technologies and services are developed, and a problem of frequency exhaustion becomes serious as fixed frequency bands are occupied in order to provide excellent communication technologies and services.

Recently, a frequency sharing scheme has attracted attention as a solution to solve such a problem. This is based on the fact that the current frequency shortage is due to the existing partitioned frequency management method, and it seems that the frequency is insufficient on the frequency distribution table, but the frequency shortage problem can be solved through the shared method.

As the problem of depletion of frequency resources has been recognized globally, the US Federal Communications Commission (FCC) announced in November 2008 that the TV White Space (TVWS) (Cognitive Radio), a frequency sharing technology, and revised the relevant regulations.

Here, the cognitive radio technology refers to a system in which a communication device observes a communication environment by itself, determines and selects an operation mode for optimal communication, and plans a future judgment process based on previous communication experience. In other words, it finds the spectrum space, white space, which is not used in the frequency spectrum allocated to the unlicensed band or is not used temporally / spatially, and is adaptive and opportunistic. Technology. At this time, if a primary user having a license is found in the band, the user should immediately stop using the band or adjust the transmission power so that the main user is not harmed.

In this context, since the usable frequency band of TVWS is a frequency band that has not been used in conventional terminals, it is possible to take an antenna capable of exhibiting smooth antenna performance in view of antenna performance such as bandwidth and being built in a mobile terminal.

It is an object of the present invention to provide a terminal having an improved antenna device.

It is another object of the present invention to provide a terminal having an antenna device that exhibits good frequency characteristics in a TVWS frequency band that has not been used before.

According to another aspect of the present invention, there is provided a terminal comprising: a terminal body; and a first antenna element and a second antenna element embedded in the main body, Wherein the divider converts a unbalanced signal input and output through the input unit into a balanced signal and outputs the balanced signal through first and second terminal units respectively connected to the antenna elements, And may include a marchand balun device configured to be input and output.

According to an example of the present invention, the muffled balun device includes a first extension portion extending from the input portion by a predetermined length, and second and third extension portions extending in parallel from the first extension portion can do.

According to an example of the present invention, the lengths of the second and third extension portions may have lengths corresponding to? / 4 of the balanced signal transmitted / received through the first and second terminal portions, respectively.

According to one example of the present invention, the meridional balun device comprises a plurality of layers stacked, wherein the first to third extension portions are disposed apart from each other, and the second layer includes the second and third extension portions, And a ground that is connected to one end of the third extension unit and grounded, respectively.

According to one example of the present invention, the merged balun device comprises a first coupling member and a second coupling member, each of which is connected to the first extension to increase the coupling coefficient .

According to one example of the present invention, the first coupling member and the second coupling member may extend toward the second and third extension portions projected on the second layer, respectively.

According to one example of the present invention, the MSS is characterized in that at least a first layer and a second layer are laminated to each other, the first extending portion extends from one side end to the other side end of the first layer, And may be formed so as to extend from the side end to the one side end.

According to an example of the present invention, the first layer may include at least one ground line extending parallel to the first extension.

According to one example of the present invention, the second extending portion and the third extending portion include at least one ground line formed in the second layer and extending parallel to the second extending portion and the third extending portion Lt; / RTI >

According to an embodiment of the present invention, a third layer is formed to cover the first layer, the first extending portion is bent at the other end, passes through the third layer through the via holes, And may extend to one end.

According to an example of the present invention, the first antenna element and the second antenna element may be formed to transmit and receive a signal of TVWS (TV White Space) frequency band.

According to another aspect of the present invention, there is provided a communication system including a communication controller, which is mounted on the circuit board and is connected to an input unit of the distributor, wherein the communication controller, when receiving available TVWS frequency information in an area where the terminal is located, And may be configured to input / output an unequal signal to / from the input unit so as to transmit / receive signals at a usable TVWS frequency.

According to an example embodiment of the present invention, the distributor may include a plurality of MSSs such that the first antenna element and the second antenna element operate as Multiple Input Multiple Output (MIMO).

In the terminal according to at least one embodiment of the present invention configured as described above, the antenna can be more efficiently implemented in a small space and the performance of the antenna can be maintained, thereby making the terminal more compact.

Further, by using a merge-type balun device as a distributor, the bandwidth of the frequency can be greatly improved.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention;
2 is a block diagram of an antenna device according to an embodiment of the present invention;
3 is a conceptual diagram of an embodiment of the present invention and an antenna device.
4 is an exploded perspective view of a muffled balun apparatus according to a first embodiment of the present invention;
5 is an exploded perspective view of a merged balun apparatus according to a second embodiment of the present invention;
Figure 6 is an exploded perspective view in accordance with an alternate embodiment of a muffled balun apparatus in accordance with the embodiment of Figure 4;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. In addition, it should be noted that the attached drawings are only for easy understanding of the embodiments disclosed in the present specification, and should not be construed as limiting the technical idea disclosed in the present specification by the attached drawings.

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

1 is a block diagram illustrating each configuration of a mobile terminal according to an embodiment disclosed herein.

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

Hereinafter, the components will be described in order.

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

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

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

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

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

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

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

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

The mobile communication module 112 is configured to implement a video communication mode and a voice communication mode. The video call mode refers to a state of talking while viewing a video of the other party, and the voice call mode refers to a state in which a call is made without viewing the other party's video. In order to implement the video communication mode and the voice communication mode, the mobile communication module 112 is configured to transmit and receive at least one of voice and image.

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

The short-range communication module 114 refers to a module for short-range communication. Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as a short range communication technology.

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

Referring to FIG. 1, an A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes an image frame such as a still image or moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ Two or more cameras 121 may be provided depending on the use environment.

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

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

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

The output unit 150 may include a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154, for example, for generating output related to visual, auditory, have.

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

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

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

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

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

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

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

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

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

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

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

The audio output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output module 152 may include a receiver, a speaker, a buzzer, and the like.

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

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

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

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

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

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM (Random Access Memory), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read- A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the external device. For example, a 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 usage right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module a universal subscriber identity module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

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

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

 In addition, the control unit 180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively. The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

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

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays , Microprocessors, microprocessors, microprocessors, and other electronic units for carrying out other functions. In some cases, the embodiments described herein may be implemented by the controller 180 itself.

According to a software implementation, embodiments such as the procedures and functions described herein may be implemented with separate software modules. Each of the software modules may perform one or more of the functions and operations described herein.

The software code may be implemented in a software application written in a suitable programming language. The software code is stored in the memory 160 and can be executed by the control unit 180. [

In addition, the controller 180 may display a folder including at least one application using a representative image set on the display unit 151. [

Here, the representative image is an image representing the folder on the display unit 180, and may be displayed entirely in an area where the folder is displayed, or may be displayed in a part of the folder.

In addition, when the user's selection is detected with respect to the representative image, the controller 180 displays an icon of the application included in the folder indicated by the representative image on the display unit 151, Application information can be provided.

The antenna device according to embodiments of the present invention can operate in a frequency band of TV whitespace (TVWS), and a TV whitespace related to a terminal will be described below.

The TV White Space includes the VHF band 54 to 60, 76 to 88, 174 to 216 MHz allocated to the broadcast TV system and the UHF band (470 to 698 MHz), and an authorized device Means a frequency band licensed for use by an unauthorized device under the condition that it does not interfere with the communication of the device (TV broadcast and wireless microphone, etc.). Here, the unauthorized device includes a mobile terminal or a fixed terminal.

On the other hand, TVWS is an abbreviation of TV White Space (white space), which means an empty frequency band not used by broadcasters in the VHF and UHF frequency bands allocated for TV broadcasting, Means the unlicensed band that can be used if the conditions are met. That is, the TV whitespace may refer to frequency information for broadcasting. As a remedy, it refers to an area in which a frequency band that is not used by a band or region that is left empty due to frequency interference between broadcasters, or an area where a radio wave for broadcasting is insufficient, and the broadcasting company does not transmit a broadcast in the morning Means a broadcast frequency that is empty at a time zone that does not exist. It should not interfere with reception of TV viewers who are customers of broadcasters, nor should it affect the wireless microphone devices that communicate with small power using a part of this band.

In the range of 512 to 608 MHz and 614 to 698 MHz, operation is allowed for all unauthorized devices except for a few special cases, but the 54 to 60 MHz, 76 to 88 MHz, 174 to 216 MHz, and 470 to 512 MHz bands are fixed devices, Was only allowed for communication between. A fixed device is a device that performs transmission only at a fixed location.

The IEEE 802.11 TVWS terminal represents an unauthorized device operating with the IEEE 802.11 MAC and PHY in the TV Whitespace spectrum.

Unauthorized users wishing to use TV Whitespace should provide protection for authorized users. Therefore, before starting transmission in the TV band, make sure whether the authorized user occupies the corresponding band.

For this purpose, unauthorized devices must access the geo-location database through the Internet or a dedicated network to obtain available channel list information in the area. The location information database is a database that stores and manages channel usage information that changes dynamically according to the information of the authorized devices registered with the terminal, the location information of the authorized devices, and the usage time.

A station (STA) performs a spectrum sensing mechanism. Energy detection and feature detection methods are used as the spectrum sensing mechanism. If the strength of the received signal is greater than a predetermined value, it is determined that the user is in use first or if the DTV preamble is detected. If it is determined that the user is currently using the channel immediately adjacent to the currently used channel, the STA and the access point (AP) must lower the transmission power.

In order to provide an antenna operating in the TVWS frequency band, an antenna capable of operating smoothly in a frequency band of 400 MHz to 700 MHz, which is not used in a conventional mobile terminal, is required.

FIG. 2 is a block diagram of an antenna device according to an embodiment of the present invention, FIG. 3 is a conceptual diagram of an embodiment of the present invention and an antenna device, and FIG. 4 is a schematic diagram of an antenna device according to a first embodiment of the present invention. Fig.

The antenna device mounted on the terminal includes a communication controller 230 and a distributor 240 formed on a circuit board 201 and a first antenna element 210 and a second antenna element 210 disposed adjacent to the circuit board 201, 220 may be formed. The first antenna element 210 and the second antenna element 220 are formed to transmit and receive a TVWS (TV White Space) frequency band signal.

The communication controller 230 transmits the RF signal to the first antenna element 210 and the second antenna element 220 through the distributor 240. Each of the antenna elements, the communication control unit, and the distributor are connected to each other through a strip line formed on one surface of the circuit board.

In addition, the communication control unit 230 accesses a geo-location database, obtains available channel list information in a corresponding area, and receives usable frequency information. The communication control unit 230 is configured to input / output an unequal signal to / from the input unit 254 so that the TVWS frequency information can be transmitted and received at a usable TVWS frequency when the available TVWS frequency information of the area where the terminal is located is received.

As shown in FIG. 3, a distributor 240 is formed on one surface of the circuit board 201. The distributor 240 includes at least one marchand valun device 250. [ The Mussent Balun device 250 converts between a balanced signal and an unbalanced signal.

When an unbalanced signal is input to the MSSB 250 through one transmission line, the MSSB 250 outputs two balanced signals having opposite phases. The opposite is also possible. Since the high frequency unbalanced signal is very susceptible to the noise transmitted through the ground line which is a reference of the signal level, the use of such a mergeable balun device 250 allows the merge balun device 250, which converts it into a balanced signal, .

The Mussent Balun device 250 is primarily used for balanced mixers, 2-multipliers, and push-pull amplifier designs. Balanced mixers are used in many RF systems because of their excellent harmonic rejection and high dynamic range. Two signals of the same magnitude and opposite phase are used in the divider.

The frequency band of the Mussent Balun device 250 is known up to twice the maximum start frequency (1 octave). Since the MSSB 250 acts as a transformer in transmitting a signal to the free space through the antenna element, the impedance can be changed slowly. This gentle change in impedance can prevent a sudden change in the impedance trajectory in the frequency band, and thus can broaden the bandwidth of the antenna.

Accordingly, when the frequency band of the MSSV 250 is wide, the frequency band of the splitter 240 using the MSSV 250 may also increase. As described above, when the meridional balun device 250 is used as the distributor 240, the bandwidth of the frequency can be increased.

4, the merged balun device 250 includes a first extension portion 253 extending from the input portion 254 by a predetermined length, and a second extension portion 253 extending in parallel to the first extension portion 253, 2 and third extensions 256, 258, respectively. The length of the second extension part 256 has a length corresponding to? / 4 of the balanced signal input / output through the first terminal part 257, respectively. The length of the third extension 258 has a length corresponding to? / 4 of the balanced signal input / output through the second terminal 259, respectively. The first terminal portion 257 and the second terminal portion 259 are connected to the first antenna element 210 and the second antenna element 220, respectively.

The RF characteristic of the meridional balun device 250 can be improved by increasing the coupling coefficient between the lines. The number of coupled members 263, 264 may be increased to increase the coupling coefficient of the merged balun device 250. The coupling members 263 and 264 may be arranged horizontally or vertically.

In addition to the capacitance between the extensions disposed in the horizontal direction, the coupling members 263 and 264 are arranged in a vertical direction to form a capacitance between the extension and the coupling members 263 and 264, thereby increasing the coupling coefficient The operating characteristics can be improved.

As such, in order to increase the coupling coefficient, the merged balun apparatus 250 can be made to have a three-dimensional shape. Further, it may be composed of a plurality of layers so as to be formed in a three-dimensional shape.

In the case of a plurality of layers, as shown in FIG. 3, the extensions may have a three-dimensional shape and may be supported on a ground layer formed on the bottom surface. As shown in FIGS. 5 and 6, And stacked on each other.

Referring to FIG. 4, a meridional balun apparatus 250 according to an embodiment of the present invention includes a plurality of layers stacked on each other. In this case, the first to third extension portions 253, 256, 258 are spaced apart from each other in the first layer 252, and the second and third extension portions 256, 258 and a ground connected to each of the ends 261, 262, respectively. A first coupling member 263 and a second coupling member 264 connected to the first extension 253 to increase the coupling coefficient are formed on the first layer 252 and the second coupling member 264, The second layer 251 may be formed.

The first coupling member 263 and the second coupling member 264 each extend toward the second and third extensions 256 and 258 projected to the second layer 251 to increase the coupling coefficient .

The balanced signals input to and output from the first terminal portion 257 and the second terminal portion 259 of the MSSV 250 may be opposite in phase and may have the same size.

FIG. 5 is an exploded perspective view of a second embodiment of the present invention, and FIG. 6 is an exploded perspective view of a modified embodiment of a Mussent Balun apparatus in accordance with the embodiment of FIG.

5 to 6 are formed in the form of FPCB and are formed of a plurality of layers. A dielectric layer may be formed between the plurality of layers. Unlike the first embodiment, since the FPCB has a stacked structure, it can be realized with a smaller volume.

5, the merged balun apparatus 350 includes at least a first layer 352 and a second layer 351 laminated to each other, and the first extending portion 353 is formed at one side of the first layer 352 Extending to the other side end, bent at the other side end, and then extended to one side end.

In more detail, the first extension 353 includes a first member 353a and a second member 353b extending parallel to each other, and a second member 353b connecting the first member 353a and the second member 353b And a connecting member 353c. The first member 353a and the second member 353b extend from one end to the other end, respectively. And the connecting member 353c extends to be bent from the first member 353a and is connected to the second member 353b. If the first extension of the first embodiment is implemented with the length L, due to the bent structure of the extension, the extension of this embodiment can be implemented with a length of L / 2. That is, it is possible to implement a muffled balun device with a smaller size.

The first layer 352 and the second layer 351 may each include at least one ground line 365, 366, which may form a ground.

An input section 354 is formed at one end of the first extension section 353 disposed on the first layer 352 and an input section 354 is formed on the other end of the second extension section 356 and the third extension section 358, And second terminal portions 357 and 359 are formed. The first and second terminal portions 357 and 359 are connected to the first and second antenna elements 310 and 320, respectively.

The first extension 353 disposed in the first layer 352 and the second and third extensions 356 and 358 disposed in the second layer 351 are coupled and coupled to each other.

With this configuration, the unbalanced signal input from the communication control unit through the input unit is converted into the balanced signal having the opposite phase through the second extension unit and the third extension unit coupled to the first extension unit, And are transmitted to the first and second antenna elements 310 and 320 through the second terminal portions 357 and 359, respectively.

6, the merged balun device 450 includes at least a first layer 452 and a second layer 451 laminated to each other, and the first extending portion 453 is formed at one side of the first layer Extending to the other side end, bent at the other side end, and then extended to one side end.

In more detail, the first extension 453 includes a first member 453a and a second member 453b extending in parallel with each other, and a connection 453b connecting the first member 453a and the second member 453b. Member 453c. The first member 453a and the second member 453b extend from one end to the other end, respectively. And the connecting member 453c extends to be bent from the first member 453a and is connected to the second member 453b. If the first extension of the first embodiment is implemented with the length L, due to the bent structure of the extension, the extension of this embodiment can be implemented with a length of L / 2. That is, it is possible to implement a muffled balun device with a smaller size.

A third layer 467 is formed so as to cover the first layer 452 and the first extended portion 453 is bent at the other end and penetrates the third layer 467 through the via holes 468, And extends to one end of the first layer 452.

That is, the first extending portion 453 extends from one side end to the other side in the first layer 452 and is bent to extend through the via hole 468 of the third layer 467, Extends along one side of the first layer 457 and extends through the via hole 468 toward the first layer 452 and then again bent to extend from the first layer 452 to one side.

The first member 453a and the second member 453b may be formed on the first layer 452 and the connecting member 453c may be disposed on one surface of the third layer 467. [ That is, the connecting member 453c is disposed apart from the first layer 452. [ As a result, the first layer and the dielectrics are present between the connection member 453c and the terminal portions 457 and 459, so that the connection members and the terminal portions are separated from each other as compared with the second embodiment. As a result, according to the present embodiment, RF characteristics such as bandwidth or insertion loss can be further improved.

When the connecting member 453c is made of a wire, the first member 453a and the second member 453b can be connected to the connecting member 453c by wire bonding. The connecting member 453c may be a conductive pattern formed on one side of the third layer 467. [

An input section 454 is formed at one end of the first extension section 453 disposed on the first layer 452 and an input section 454 is formed at the other end of the second extension section 456 and the third extension section 458, And second terminal portions 457 and 459 are formed. The first and second terminal portions 457 and 459 are connected to the first and second antenna elements 410 and 420, respectively.

The first layer 452 and the second layer 451 may each include at least one ground line 465, 466, which may form a ground.

With this configuration, the unbalanced signal input from the communication control unit through the input unit is converted into the balanced signal having the opposite phase through the second extension unit and the third extension unit coupled to the first extension unit, And are output to the first and second antenna elements 410 and 420 through the second terminal portions 457 and 459, respectively. In this case, the RF characteristics of the signals measured through the output port are 180 ° ± 2 and the insertion loss is 1 dB or less, which indicates that the RF characteristics have good frequency characteristics and bandwidth.

As described above, the antenna device according to an embodiment of the present invention can provide a wide bandwidth in the TVWS frequency band and reduce noise. In addition, since it can be manufactured in a smaller size, the terminal can be miniaturized.

An antenna device according to embodiments of the present invention can be used as a MIMO antenna operating in the LTE frequency band.

MIMO is an abbreviation of "Multiple Input Multiple Output". It is a way to improve transmission / reception data efficiency by adopting multiple transmit antennas and multiple receive antennas by avoiding using one transmit antenna and one receive antenna so far It says. That is, the present invention is applied to a technique of collecting pieces of fragmentary data received from various antennas without relying on a single antenna path in order to receive one entire message.

Such a MIMO technique can improve the data transmission speed in a specific range or increase the system range for a specific data transmission speed. That is, the MIMO technique is a next-generation mobile communication technology widely used for user equipments (UEs) and repeaters of mobile communication

In order for the antenna apparatus to function as a MIMO antenna, the distributor may be formed by including a plurality of merged balun devices.

The above-described terminal may be configured such that the configuration and method of the embodiments described above are not limitedly applied, but the embodiments may be configured such that all or some of the embodiments are selectively combined so that various modifications may be made. have.

Claims (15)

A terminal body having a circuit board; And
And a distributor having a marchand balun device formed on the circuit board and formed in a multi-layered structure to supply a radio signal to the adjacent first antenna element and the second antenna element,
The muffled balun device comprises:
A first extension formed in any one of the layers and receiving an unbalanced signal; And
And second and third extension portions formed on a layer different from the first extension portion and outputting a balanced signal,
The extensions formed on different layers are coupled and coupled,
Wherein the at least one first layer and the second layer are laminated to each other,
Wherein the first extension comprises a first member and a second member extending in parallel to each other, and a connecting member connecting the first member and the second member,
The connecting member being disposed in a vertical direction spaced from the first layer,
Wherein a third layer is formed to cover the first layer and the first extension extends through the third layer through the via holes formed in the third layer and extends to the first layer. ◈ Claim 2 is abandoned due to payment of registration fee. The method according to claim 1,
The muffled balun device comprises:
And the second and third extensions extend parallel and spaced apart from the first extension. ◈ Claim 3 is abandoned due to the registration fee. 3. The method of claim 2,
Wherein the lengths of the second and third extension portions each have a length corresponding to? / 4 of the balanced signal transmitted and received through the first and second terminal portions connected to the first and second antenna elements, respectively. ◈ Claim 4 is abandoned due to the registration fee. The method according to claim 2 or 3,
Wherein the first extending portion is formed to extend from one side end to the other side end of the first layer and extend from the other side end to the one side end. delete delete ◈ Claim 7 is abandoned due to registration fee. 5. The method of claim 4,
The first layer and the dielectrics are spaced apart from each other in the vertical direction between the connection member and the terminal portions, thereby realizing the merged balun device with a smaller size and improving RF characteristics such as bandwidth or insertion loss . delete delete A terminal body;
A circuit board embedded in the main body and electrically connected to the adjacent first antenna element and the second antenna element; And
And a splitter formed on the circuit board to feed a TVWS (TV White Space) frequency band signal to the first antenna element and the second antenna element,
Wherein the distributor comprises:
An unbalanced signal input through an input unit is converted into a balanced signal and is output to the antenna elements,
And a marchand balun device configured to extend the bandwidth in the frequency band,
The muffled balun device comprises:
A first extension formed in any one of the layers and receiving an unbalanced signal; And
And second and third extension portions formed on a layer different from the first extension portion and outputting a balanced signal,
The extensions formed on different layers are coupled and coupled,
Wherein the at least one first layer and the second layer are laminated to each other,
Wherein the first extension comprises a first member and a second member extending in parallel to each other, and a connecting member connecting the first member and the second member,
The connecting member being disposed in a vertical direction spaced from the first layer,
Wherein a third layer is formed to cover the first layer and the first extension extends through the third layer through the via holes formed in the third layer and extends to the first layer. ◈ Claim 11 is abandoned due to registration fee. 11. The method of claim 10,
The muffled balun device comprises:
A first extension extending from the input unit by a predetermined length;
And a second and a third extension extending parallel and spaced apart from the first extension. ◈ Claim 12 is abandoned due to registration fee. 12. The method of claim 11,
Wherein the multilevel balun device comprises a plurality of layers stacked,
In the first layer, the first to third extending portions are disposed apart from each other,
And the second layer has a ground connected to one end of the second and third extensions, respectively. ◈ Claim 13 is abandoned due to registration fee. 13. The method of claim 12,
The muffled balun device comprises:
And a first coupling member and a second coupling member each connected to the first extension to increase a coupling coefficient. delete A terminal body;
A circuit board embedded in the main body and electrically connected to the adjacent first antenna element and the second antenna element; And
And a distributor formed on the circuit board to supply a radio signal to the first antenna element and the second antenna element,
Wherein the distributor comprises:
A first extending portion formed in the first layer and extending from the input portion by a predetermined length; And
And a second and a third extension formed on a second layer covering the first layer and coupled to the first extension,
A first antenna element and a second antenna element are fed to a balanced signal to convert an unbalanced signal input from the input unit into a balanced signal to expand the bandwidth of the radio signal,
Wherein the first extension comprises a first member and a second member extending in parallel to each other, and a connecting member connecting the first member and the second member,
The connecting member being disposed in a vertical direction spaced from the first layer,
Wherein a third layer is formed to cover the first layer and the first extension extends through the third layer through the via holes formed in the third layer and extends to the first layer.

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