KR101540094B1 - Mobile Terminal having Antenna - Google Patents

Abstract

The present invention relates to a portable terminal having an antenna. And an antenna including a pair of slots arranged symmetrically with respect to each other so as to have the same distance from the feeding part and having a radiating part supplied with an electric signal from the feeding part. According to the present invention, various communication services can be used and the antenna can be miniaturized.

Antenna, UWB, slot, dielectric, notch,

Description

A mobile terminal having an antenna (Mobile Terminal having Antenna)

The present invention relates to a portable terminal having an antenna, and more particularly, to a portable terminal having an antenna having a small size and a UWB band.

A portable terminal is a portable device having one or more functions that can perform voice and video communication, input / output of information, and data storage while being portable, and occupies a large position in daily life .

The size of the portable terminal tends to become smaller and thinner. Therefore, the size of the antenna built in the portable terminal is getting smaller.

In addition, a technology for applying a portable terminal to various services such as a home care service and a computer intercommunication service is being developed. In order for various mobile communication systems to be implemented as one portable terminal, the antenna included in the portable terminal must be an Ultra-Wideband (UWB) band. Generally, to implement an antenna having a UWB band, an additional device is installed in addition to the existing components of the antenna. In this case, the antenna implementation method becomes complicated and the size of the antenna becomes large.

In addition, when an antenna of the UWB band is used, a service that can not be applied to the portable terminal may overlap with a frequency band, so that a method of blocking the overlapping frequency is also required.

Therefore, there is a demand for a portable terminal having a small size UWB band and an antenna capable of partially blocking the frequency.

Accordingly, it is an object of the present invention to provide a portable terminal having a UWB band characteristic and an antenna that partially blocks a specific frequency, thereby providing a miniature antenna applicable to various mobile communication services.

According to an aspect of the present invention, there is provided a portable terminal comprising: a power feeder for supplying an electric signal; and a pair of slots symmetrically disposed so as to have the same distance from the power feeder, And an antenna including a radiating part to which an electrical signal is supplied.

INDUSTRIAL APPLICABILITY According to the present invention, various communication services can be utilized through an antenna having a UWB band, and the antenna can be downsized.

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

The portable terminal described in this specification includes a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and navigation.

FIG. 1 is a block diagram of a portable terminal according to an exemplary embodiment of the present invention. Referring to FIG. Referring to FIG. 1, a mobile terminal according to an exemplary embodiment of the present invention will be described in terms of its functional components.

1, the portable 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, an interface unit 170, a control unit 180, and a power supply unit 190. When such components are implemented in practical applications, two or more components may be combined into one component, or one component may be divided into two or more components as necessary.

The wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 113, a wireless Internet module 115, a short distance communication module 117, and a GPS module 119.

The broadcast receiving module 111 receives at least one of a broadcast signal and broadcast related information from an external broadcast management server through a broadcast channel. At this time, the broadcast channel may include a satellite channel, a terrestrial channel, and the like. The broadcast management server may refer to a server for generating and transmitting at least one of a broadcast signal and broadcast related information and a server for receiving at least one of the generated broadcast signal and broadcast related information and transmitting the broadcast signal to the terminal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. 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 can also be provided through a mobile communication network, in which case it can be received by the mobile communication module 113. Broadcast-related information can 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).

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-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S) ), Digital Video Broadcast-Handheld (DVB-H), Integrated Services Digital Broadcast-Terrestrial (ISDB-T), and the like. In addition, the broadcast receiving module 111 may be configured to be suitable for all broadcasting systems that provide broadcasting signals, as well as the digital broadcasting system. 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 113 transmits and receives a radio signal to at least one of a base station, an external terminal, and a server on a mobile communication network. Here, the wireless signal may include various types of data according to a voice call signal, a video call signal, or a character / multimedia message transmission / reception.

The wireless Internet module 115 refers to a module for wireless Internet access, and the wireless Internet module 115 can be embedded in the mobile terminal 100 or externally. The short-range communication module 117 refers to a module for short-range communication. Bluetooth, radio frequency identification (RFID), infrared data association (IrDA), ultra wideband (UWB), ZigBee, and the like can be used as the short range communication technology. A GPS (Global Position System) module 119 receives position information from a plurality of GPS satellites.

The 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 123. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. Then, 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. [ The camera 121 may be equipped with two or more cameras according to the configuration of the terminal.

The microphone 123 receives an external sound signal by 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 113 and output when the voice data is in the call mode. The microphone 123 may be implemented with various noise reduction algorithms for eliminating noise generated in receiving an external sound signal.

The user input unit 130 generates key input data that the user inputs 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, a finger mouse, and the like. Particularly, when the touch pad has a mutual layer structure with the display unit 151 described later, it can be called a touch screen.

The sensing unit 140 senses the current state of the portable terminal 100 such as the open / close state of the portable terminal 100, the position of the portable terminal 100, Thereby generating a sensing signal. For example, when the portable terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. In addition, a sensing function related to whether or not the power supply unit 190 is powered on, whether the interface unit 170 is coupled to an external device, and the like can be handled.

The output unit 150 is for outputting an audio signal, a video signal, or an alarm signal. The output unit 150 may include a display unit 151, an audio output module 153, and an alarm unit 155.

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

Meanwhile, as described above, when the display unit 151 and the touch pad have a mutual layer structure to constitute a touch screen, the display unit 151 can be used as an input device in addition to the output device. If the display unit 151 is configured as a touch screen, it may include a touch screen panel, a touch screen panel controller, and the like. In this case, the touch screen panel is a transparent panel attached to the outside, and can be connected to a bus inside the portable terminal. The touch screen panel keeps a watch on the contact result, and if there is a touch input, sends the corresponding signals to the touch screen panel controller. The touch screen panel controller processes the signals, and then transmits corresponding data to the controller 180 so that the controller 180 can determine whether the touch input has been made and which area of the touch screen has been touched.

The display unit 151 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, And a display (3D display). There may be two or more display units 151 according to the implementation mode of the portable terminal 100. [ For example, the portable terminal 100 may include an external display unit (not shown) and an internal display unit (not shown) at the same time.

The audio output module 153 outputs 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 153 outputs sound signals related to functions performed in the portable terminal 100, for example, a call signal reception tone, a message reception tone, and the like. The sound output module 153 may include a speaker, a buzzer, and the like.

The alarm unit 155 outputs a signal for notifying the occurrence of an event of the portable terminal 100. Examples of events occurring in the portable terminal 100 include call signal reception, message reception, and key signal input. The alarm unit 155 outputs a signal for notifying the occurrence of an event in a form other than an audio signal or a video signal. For example, it is possible to output a signal in a vibration mode. When a call signal is received or a message is received, the alarm unit 155 may output a vibration to notify it. Alternatively, when the key signal is input, the alarm unit 155 can output the vibration by the feedback to the key signal input. This vibration output allows the user to recognize the occurrence of an event. Of course, a signal for notifying the occurrence of an event may also be output through the display unit 151 or the sound output module 153. [

The memory 160 may store a program for processing and controlling the control unit 180 and may store a function for temporarily storing input or output data (e.g., a phone book, a message, a still image, .

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 , And a ROM. ≪ / RTI > In addition, the portable terminal 100 may operate a web storage for storing the memory 150 on the Internet.

The interface unit 170 serves as an interface with all external devices connected to the portable terminal 100. Examples of the external device connected to the portable terminal 100 include a card socket such as a wired / wireless headset, an external charger, a wired / wireless data port, a memory card, a SIM / UIM card, / Output, Video I / O, and Earphone. The interface unit 170 receives data from the external device or receives power from the external device and transmits the data to each component in the portable terminal 100 so that data in the portable terminal 100 can be transmitted to the external device .

The controller 180 typically controls the operation of the respective units to control the overall operation of the mobile terminal 100. For example, voice communication, data communication, video communication, and the like. In addition, the control unit 180 may include a multimedia playback module 181 for multimedia playback. The multimedia playback module 181 may be configured in hardware in the controller 180 or separately from software in the controller 180. [

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 portable terminal according to the present invention has been described in terms of components according to functions. Hereinafter, with reference to FIG. 2 and FIG. 3, the portable terminal related to the present invention will be described in more detail from the viewpoint of the components according to the external form. Hereinafter, a slider type portable terminal having a front touch screen and a slider type keypad among various types of portable terminals such as a folder type, a bar type, a swing type, a slider type, . However, the present invention is not limited to a slider type portable terminal, but can be applied to all types of portable terminals including the above-mentioned type.

2 is a perspective view of a portable terminal according to an embodiment of the present invention. Referring to FIG. 2, the portable terminal includes a first body 100A and a second body 100B configured to be slidable along at least one direction on the first body 100A.

The state where the first body 100A is disposed in a state of being overlapped with the second body 100B may be referred to as a closed configuration and the first body 100A may be referred to as a second body 100B ) May be referred to as an open configuration.

While the portable terminal 100 is in the closed state, it operates mainly in the standby mode, but the standby mode is also canceled by the user's operation. While the portable terminal 100 is open, it operates mainly in a communication mode, but it is also switched to a standby mode by a user's operation or a predetermined period of time.

The case constituting the outer appearance of the first body 100A is formed by the first front case 100A-1 and the first rear case 100A-2. Various electronic components are embedded in the space formed by the first front case 100A-1 and the first rear case 100A-2. At least one intermediate case may be additionally disposed between the first front case 100A-1 and the first rear case 100A-2. Such cases may be formed by injection molding of a 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 first sound output module 153a, and the first camera 121a may be disposed in the first body 100A, specifically, the first front case 100A-1.

The display unit 151 includes a liquid crystal display (LCD), an OLED (Organic Light Emitting Diodes), and the like that visually express information. The touch pad may be superimposed on the display unit 151 in a layer structure so that the display unit 151 may operate as a touch screen so that information can be input by a user's touch.

The first acoustic output module 153a may be implemented in the form of a receiver or a speaker. The first camera 121a may be adapted to photograph an image or a moving image of a user or the like.

The case constituting the appearance of the second body 100B is formed by the second front case 100B-1 and the second rear case 100B-2. The first operation unit 130a may be disposed on the front face of the second body 100B, specifically, the second front case 100B-1. The second user input unit 130c, the microphone 123 and the interface unit 170 may be disposed on at least one of the first front case 100B-1 and the second rear case 100B-2.

The first user input unit 130a receives a command for controlling the operation of the portable terminal. The first user input unit 130a may include an input key having a function corresponding to a mouse function such as a joystick key, a touch pad, a track ball, a pointing stick, a finger mouse, and the like.

The first and second user input units 130a and 130c may be collectively referred to as a manipulating portion 130 and any method may be adopted if the user operates in a tactile manner with a tactile impression have. For example, the user input unit 130 may be implemented as a dome switch or a touch pad capable of receiving a command or information by a push or a touch operation of a user, or may be a wheel, a jog type, Method or the like.

In terms of functionality, the first user input 130a is for entering commands, numbers, letters, symbols, etc., such as start, end, scroll, and the like. Also, the second user input unit 130c may operate as a hot-key for activating a special function in the portable terminal.

The microphone 123 may be implemented in a form suitable for receiving voice, sound, etc. of the user. The interface unit 170 enables the portable terminal according to the present invention to exchange data with an external device. For example, the interface unit 170 may be at least one of a connection terminal for connecting to an earphone, a port for short-range communication, or power supply terminals for supplying power to the portable terminal 100, have. The interface unit 170 may be a card socket that accommodates an external card such as a user authentication module such as a subscriber identification module (SIM) or a user identity module (UIM), or a memory card for information storage.

A power supply unit 190 for supplying power to the portable terminal is mounted on the second rear case 100B-2. The power supply unit 190 may be a rechargeable battery, for example, and may be detachably coupled to the second body 100B for charging or the like.

3 is a rear perspective view of the portable terminal shown in FIG. Referring to FIG. 3, a second camera 121b may be further mounted on the rear surface of the second rear case 100B-2 of the second body 100B. The second camera 121b has a photographing direction substantially opposite to that of the first camera 121a, and may have pixels different from those of the first camera 121a.

For example, the first camera 121a has low pixels so that it is easy to capture a face of a user in the case of a video call or the like and transmit the face to the other party. The second camera 121b photographs a general object and immediately transmits It is preferable to have a high pixel.

A third user input unit 130d may be additionally mounted on the rear surface of the second rear case 100B-2 of the second body 100B. The third user input unit 130d may be implemented with a wheel, and may operate as a special function key such as a scroll in the portable terminal.

A flash 125 may be further disposed adjacent to the second camera 121b. The flash 125 illuminates the subject when the subject is photographed by the second camera 121b.

An antenna (not shown) for communication or the like may be disposed inside the second front case 100B-1 or the second rear case 100B-2.

On one side of the second rear case 100B-2, a broadcast signal receiving antenna 105 may be disposed in addition to an antenna for communication. The antenna 105 may be installed to be able to be drawn out from the second body 100B. A part of the slide module 100C that slidably connects the first body 100A and the second body 100B is disposed on the first rear case 100A-2 side of the first body 100A. The other part of the slide module 100C may be disposed on the second front case 100B-1 side of the second body 100B and may not be exposed to the outside as shown in Fig.

In addition, a fourth user input unit 130e serving as a selection or confirmation key for a specific function may be disposed on one side of the second rear case 100B-2. The fourth user input unit 130e may operate as a hot-key for activating a special function in the portable terminal.

In the above description, the second camera 121b and the like are disposed on the second body 100B, but the present invention is not limited thereto. At least one of the structures 105, 121b, and 125 described as being arranged in the second rear case 100B-2, such as the second camera 121b, is a first body 100A, 1 rear case 100A-2. In such a configuration, there is an advantage that the structures disposed in the first rear case 100A-2 in the closed state are protected by the second body 100B. Also, the first camera 121a may be rotatably formed so that the second camera 121b can be photographed up to the photographing direction, even if the second camera 121b is not separately provided.

4 is a block diagram illustrating an antenna according to a first embodiment of the present invention, and is a graph showing characteristics of the antenna.

As shown in FIG. 4 (a), a radiation unit 400 capable of emitting an electrical signal to the upper surface of a PCB (Printed Circuit Board) (not shown), a power supply unit The front surface 405 is disposed, and the ground surface 410 is disposed on the bottom surface of the PCB (not shown). Here, the ground plane 410 is disposed so as not to overlap with the radiation unit 400, and is disposed at a predetermined distance from the radiation unit 400. The low frequency bandwidth of the antenna can be changed according to the predetermined interval.

 As shown in FIG. 4 (b), as the distance between the radiation unit 400 and the ground plane 410 is increased, the low frequency bandwidth is widened as shown in FIG. 4 (a) .

5 to 7 are diagrams illustrating an antenna according to a second embodiment of the present invention, and graphs illustrating characteristics of the antenna.

As shown in FIG. 5A, a radiation unit 500 capable of emitting an electrical signal to a PCB (not shown), a power supply unit 505 capable of supplying an electrical signal to the radiation unit 500 . Here, the radiation unit 500 includes a pair of slots 515 of a type. The pair of slots 515 are disposed symmetrically with respect to one another and are arranged so as to have the same distance from the feeder 505 to the respective slots. Here, the distance from the feeding portion 505 to each slot includes an electrical distance. Also, one region of the slot is disposed in an open state so that one region of the slot is not blocked by the radiation portion 500. The shape of the slot can be changed.

5A, unlike an antenna in which only a radiation unit 500 having a UWB band without a cutoff frequency exists, a radiation unit 500 (FIG. 5A) The antenna including a pair of slots arranged symmetrically to each other has a band notch frequency.

6A, a radiation unit 500 capable of emitting an electrical signal to a PCB (not shown), a power supply unit 505 capable of supplying an electrical signal to the radiation unit 500 . Here, the radiation unit 500 includes a pair of T-shaped slots 520. The pair of T-shaped slots 520 are disposed symmetrically with respect to one another and are arranged so as to have the same distance from the feeding part 505 to the respective slots. Here, the distance from the feeding part 505 to each slot includes an electrical distance. Also, one region of the slot is disposed in an open state so that one region of the slot is not blocked by the radiation portion 500. The shape of the slot can be changed.

6A. As shown in FIG. 6B, the antenna including a pair of T-shaped slots in the radiation unit 500 has a band notch frequency. The band notch frequency, that is, the cutoff frequency is changed in accordance with the ratio (dsh) of the basic slot length 521 in the T-shaped slot to the additional slot length 522 added to become the T-shape. The larger the dsh, the more the cut-off frequency gradually changes to the lower frequency.

As shown in FIG. 7A, a radiation unit 500 capable of emitting an electrical signal to a PCB (not shown), a power supply unit 505 capable of supplying an electrical signal to the radiation unit 500, . Here, the radiation unit 500 includes a pair of positive type slots 525. The pair of positive slots 525 are disposed symmetrically with respect to one another and are arranged so as to have the same distance from the feeder 505 to the respective slots. Here, the distance from the feeding part 505 to each slot includes an electrical distance. Also, one region of the slot is disposed in an open state so that one region of the slot is not blocked by the radiation portion 500. The shape of the slot can be changed.

7A. As shown in FIG. 7B, the antenna including a pair of + -type slots in the radiation unit 500 has a band notch frequency. The band notch frequency, that is, the cutoff frequency, is changed in accordance with the ratio crs of the basic slot length 526 in the + shaped slot and the added slot length 527 added to become the + shape. The larger the crs, the more the cutoff frequency is changed to the lower frequency.

8 is a block diagram illustrating an antenna according to a third embodiment of the present invention, and is a graph illustrating characteristics of the antenna.

As shown in FIG. 8A, a radiation unit 600 capable of radiating an electrical signal to the upper surface of a PCB (not shown), a power supply unit 605 capable of supplying an electrical signal to the radiation unit 600, . Here, the radiation unit 600 may include a pair of slots 610 of a type. The shape of the slot can be changed. A pair of slots 610 are arranged symmetrically with respect to each other, and are arranged so as to have the same distance from the feeder 605 to the respective slots. The dielectric 615 is disposed in the radiation portion 600 along the shape of the slot. That is, the dielectric 615 having the same shape and size as those of the slot is placed on the slot. The notch characteristic of the antenna is changed according to the dielectric constant of the high-dielectric material 615, and the band notch frequency is gradually changed to a low frequency as the dielectric constant is high. The permittivity of the dielectric 615 is not limited.

As shown in FIG. 8 (b), when the high-dielectric-constant portion 615 is disposed, the band-notch characteristic of the band-shaped high- The bandwidth is narrowed. That is, the band notch characteristic becomes better.

8 (a), the band notch frequency is changed according to the dielectric constant of the high dielectric constant 615, as shown in FIG. 8 (c). As the dielectric constant of the high-dielectric 615 is higher, the cutoff frequency is gradually changed to a lower frequency, and the bandwidth of the band notch is narrowed and the band notch characteristic is improved.

FIG. 9 is a block diagram illustrating an antenna according to a fourth embodiment of the present invention, and is a graph illustrating characteristics of the antenna.

9A, a radiation unit 700 capable of radiating an electrical signal to an upper surface of a PCB (not shown), a power supply unit 705 capable of supplying an electrical signal to the radiation unit 700, . Here, the radiation unit 700 may include a pair of slots 710 of a type. The shape of the slot can be changed. A pair of slots 710 are arranged symmetrically with respect to each other, and are arranged so as to have the same distance from the feeder 705 to the respective slots.

Here, the feeding part 705 is arranged so that the area connected to the radiation part 700 is the narrowest area. The feeding part 705 is formed such that one end of the feeding part 705 connected to the radiation part 700 is the narrowest and the other end of the feeding part 705 not connected to the radiation part 700 is the widest . That is, it is tapered toward the one end of the feeding part 705 connected to the radiation part 700.

As shown in FIG. 9B, the antenna including the feeding part 705 having a gradually narrowing shape is higher in frequency than the normal feeding part 705, The matching characteristics in the band are improved. This is because the impedance matching is improved by the increasingly narrower shape.

The antenna according to the present invention includes various types of antennas such as a plane antenna and a spherical antenna.

Meanwhile, the present invention can be embodied as a processor-readable code on a processor-readable recording medium such as a mobile station modem (MSM). The processor-readable recording medium includes all kinds of recording apparatuses in which data that can be read by the processor is stored. Examples of the recording medium readable by the processor include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and also a carrier wave such as transmission over the Internet. In addition, the processor readable recording medium may be distributed over networked computer systems so that code readable by the processor in a distributed manner can be stored and executed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

1 is a block diagram of a portable terminal according to an embodiment of the present invention;

FIG. 2 is a perspective view of a mobile terminal according to an exemplary embodiment of the present invention,

FIG. 3 is a rear perspective view of the portable terminal shown in FIG. 2,

FIG. 4 is a block diagram illustrating an antenna according to a first embodiment of the present invention and a graph showing characteristics of the antenna,

5 to 7 are views showing a configuration of an antenna according to a second embodiment of the present invention and a graph showing characteristics of the antenna,

FIG. 8 is a block diagram showing an antenna according to a third embodiment of the present invention and a graph showing characteristics of the antenna,

FIG. 9 is a block diagram illustrating an antenna according to a fourth embodiment of the present invention, and is a graph illustrating characteristics of the antenna.

Claims (7)

A feeding part for supplying an electrical signal; And And an antenna including a pair of slots arranged symmetrically with respect to each other so as to have the same distance from the feeder, and a radiator for receiving an electrical signal from the feeder, The radiating part includes a pair of 'a' shaped slots so as to have a band notch characteristic, Wherein the power feeding part is formed to be gradually narrowed toward an area connected to the radiation part. The method according to claim 1, Wherein the radiating unit includes a pair of 'T' shaped slots by disposing additional slots in a pair of 'a' shaped slots. The method according to claim 1, And a dielectric disposed on the slot and having the same shape and size as the shape and size of the slot. The method of claim 3, Wherein the band notch frequency and the band notch characteristic are changed according to a dielectric constant of the dielectric. The method according to claim 1, And a ground plane disposed at a predetermined distance from the radiation unit. 6. The method of claim 5, Wherein the low frequency bandwidth varies according to the predetermined interval. The method according to claim 1, Wherein the radiating part includes a pair of '+' shaped slots by disposing additional slots in a pair of 'a' shaped slots.

Images