KR20100053824A

KR20100053824A - Antenna using the dielectric sheet and mobile equipment with antenna using the dielectric sheet

Info

Publication number: KR20100053824A
Application number: KR1020080112632A
Authority: KR
Inventors: 김남기
Original assignee: 주식회사 케이티테크
Priority date: 2008-11-13
Filing date: 2008-11-13
Publication date: 2010-05-24

Abstract

PURPOSE: An antenna and a mobile communications terminal thereof are provided to reduce the installation space of an antenna by getting over the length restriction of the antenna due to the dielectric constant. CONSTITUTION: An antenna comprises a radiator(220), a dielectric sheet(210), and at least one space(230). The radiator transmits and receives an electromagnetic signal. The radiator is made of conductive metal material. The dielectric sheet is located in one side of the radiator. The space is located between the radiator and the dielectric. The space comprises at least one among the radiator, a bonding unit of the dielectric sheet, and a corrosion preventing unit of the radiator.

Description

Mobile communication terminal with antenna using dielectric sheet and antenna using dielectric sheet {Antenna Using the Dielectric Sheet and Mobile Equipment with Antenna Using the Dielectric Sheet}

The present invention relates to an antenna and a mobile communication terminal having an antenna, and more particularly to a mobile communication terminal having an antenna using a dielectric sheet and an antenna using a dielectric sheet.

Antennas provided in portable terminals such as mobile phones and PDAs (Personal Digital Assistants) can be largely classified into external antennas and internal antennas according to installation positions.

The external antenna is mainly a whip type or helical type antenna and is fixedly installed on the side or top of the portable terminal or can be pulled out.

Since the external antenna is installed outside the portable terminal, there is a disadvantage in that it is inconvenient to use and store and damage the appearance of the portable terminal. In addition, since the installation space of the external antenna must be secured to the outside of the portable terminal, the exterior design of the portable terminal is limited, which makes it difficult to miniaturize and slim the portable terminal.

Recently, in order to compensate for the shortcomings of the external antenna as described above, an internal antenna method for installing the antenna inside the portable terminal is mainly used.

The built-in antenna (or intenna) is mainly a monopole type or a planar inverted antenna (PIFA) type, and since the antenna is installed inside the portable terminal, the internal antenna is installed inside the portable terminal. Space to be installed should be provided, and as the portable terminal becomes thinner or smaller, the installation space of the built-in antenna is reduced.

As the portable terminal becomes smaller and slimmer, the internal space of the portable terminal becomes smaller and correspondingly, the size of the built-in antenna becomes smaller and smaller, and as the size of the built-in antenna decreases as described above, the radiation resistance of the built-in antenna itself decreases. In addition, the efficiency of the antenna is lowered, which causes a problem in that the performance of the desired antenna cannot be obtained.

It is an object of the present invention to provide an antenna using a dielectric sheet.

Another object of the present invention is to provide a mobile communication terminal having an antenna using a dielectric sheet.

One embodiment of the antenna using a dielectric for achieving the object of the present invention, the antenna using a dielectric, the radiator for transmitting and receiving electromagnetic signals; And a dielectric sheet positioned on at least one surface of the radiator.

Here, the radiator may further include at least one space located between the dielectric sheet positioned on at least one surface of the radiator.

Here, the space may comprise at least one of the bonding means of the radiator and the dielectric sheet, the corrosion preventing means of the radiator.

Here, the radiator and the dielectric sheet may be fastened using fastening means.

Here, the radiator and the dielectric sheet may be formed in a size corresponding to the resonant frequency of the predetermined service band.

Here, the predetermined service band is a GPS (Global Positioning System), GSM (Global System for Mobile telecommunication), DCS (Digital Cordless System), PCS (Personal Communication Services), DMB (Digital Multimedia Broadcasting), RFID (Radio Frequency Identification) And at least one service band of a wideband code division multiple access (WCDMA) service band.

Here, the dielectric sheet may be made of poly propylene, poly styrene, polyethylene tereph thalate, poly carbonate, polyvinylidene fluoride (PVDF), Poly tetra fluorine ethylene (PTFE) and poly amide (Poly amide), it may comprise one of poly phenylene sulfide (poly phenylene sulfide).

One embodiment of a mobile communication terminal having an antenna using a dielectric for achieving another object of the present invention is a mobile communication terminal having an antenna, the radiator for transmitting and receiving electromagnetic signals and at least one surface of the radiator An antenna comprising a dielectric sheet positioned at the; A memory unit for storing user data; And it may be configured to include a control unit for controlling the mobile communication function.

Here, the radiator and the dielectric sheet may be formed to a size corresponding to the resonance frequency of the predetermined service band.

Here, the predetermined service band is a GPS (Global Positioning System), GSM (Global System for Mobile telecommunication), DCS (Digital Cordless System), PCS (Personal Communication Services), DMB (Digital Multimedia Broadcasting), RFID (Radio Frequency Identification) ) And a wideband code division multiple access (WCDMA) service band.

According to the antenna using the dielectric sheet as described above, the length constraints of the antenna can be overcome according to the dielectric constant of the dielectric, so that the antenna can be configured in a narrower space. In addition, there is an advantage that a high gain can be obtained compared to the case of using other length compensation elements.

In addition, according to the mobile communication terminal having an antenna using the dielectric sheet as described above, since the antenna can be configured in a narrow mounting space, a slimmer mobile communication terminal can be realized, and it is higher than using other length compensation elements. Since the gain can be obtained, it is possible to transmit and receive a stable signal.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described in the specification, one or more other It is to be understood that the present invention does not exclude the possibility of the presence or the addition of features, numbers, steps, operations, components, parts, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. In the following description of the present invention, the same reference numerals are used for the same elements in the drawings and redundant descriptions of the same elements will be omitted.

1 is an exemplary view for explaining the configuration of an antenna using a dielectric sheet according to an embodiment of the present invention.

1, an antenna using a dielectric sheet according to an embodiment of the present invention is an antenna using a dielectric, the radiator 120 for transmitting and receiving electromagnetic signals and a dielectric positioned on at least one surface of the radiator It may be configured to include a sheet (110).

First of all, a dielectric refers to a nonconductor or a material having very low electrical conductivity. When a dielectric is placed in an electric field, unlike conductors, there is no free electron that can move in the material, so little current flows, but electric polarization occurs. When the dielectric is subjected to an electric field, the positive charge in the dielectric moves by a small amount in the direction of the electric field and the negative charge moves in the opposite direction to the electric field. The fine polarization of the charge has the effect of reducing the strength of the electric field in the dielectric. The effect of dielectrics on electrical phenomena is dealt with in macroscopic quantities by introducing concepts such as permittivity.

Next, the permittivity is a physical quantity indicating how much the electric field affects the medium and how much is affected by the medium, which can also be viewed as the amount of charge the medium can store. Even the same amount of material can hold more charge with a higher permittivity. In addition, magnetic permeability refers to the relative value of the magnetic field generated inside the object with respect to the magnetized magnetic field at the position where the object is placed.

Next, the electromagnetic wave is a wave composed of two components, an electric field and a magnetic field, and has a characteristic of traveling through a space at a speed of light. Electromagnetic waves are transmitted through photons and can be classified into low frequency, high frequency, ultra high frequency, infrared, visible light, ultraviolet light, and ultra high frequency bands of several hundred MHz to several GHz used for mobile communication services.

As a result, the permittivity and permeability and the speed of the electromagnetic wave can be expressed by the following relationship, and the speed of the electromagnetic wave is expressed by the relationship between the wavelength and the frequency as follows.

And

Therefore, it can be assumed that the electromagnetic wave has a changed wavelength inside the object according to the permittivity of the object. In other words, the shorter wavelength can be expected in high dielectric constant materials.

Next, the radiator 120 for transmitting and receiving electromagnetic signals serves to radiate electromagnetic signals into the air and to receive electromagnetic signals introduced from the air. Therefore, a radiator can be formed using the raw material of the metal component with good electroconductivity.

For example, a conductive material such as copper (Cu) or an alloy such as copper (Cu) and nickel (Ni) may be used as the radiator, and gold (Au) may be plated on the conductive metal to resist corrosion. It may be formed to have excellent conductivity.

Next, the dielectric sheet 110 positioned on at least one surface of the radiator may be formed by forming a dielectric in the form of a sheet. It may be adjusted.

Dielectrics that can be used as dielectric sheets include poly propylene, poly styrene, poly ethylene tereph thalate, poly carbonate, polyvinylidene fluoride PVDF), poly tetrafluoro ethylene (PTFE) and poly amide, poly phenylene sulfide, and the like. It can be seen that the dielectric that can be used for the dielectric sheet is not limited to the dielectrics listed. Looking at the dielectric constant of the above-listed dielectrics are as follows.

Genome permittivity Polypropylene 2.1 to 2.2 Poly styrene 2.3 to 2.7 Polyethylene terephthalate 3.0 to 3.3 Polycarbonate 2.6 to 3.2 Polyvinylidene fluoride 9.5 to 11.0 Polytetrafluoroethylene 2.0 to 2.1 Polyamide 3.5 Polyphenylene sulfide 3.0

Therefore, the dielectric sheet may use a dielectric selected in consideration of the dielectric constant to synchronize with the received signal among the dielectrics listed.

2 is an exemplary view for explaining the configuration of an antenna using a dielectric sheet according to another embodiment of the present invention.

Referring to FIG. 2, an antenna using a dielectric sheet according to another embodiment of the present invention further includes at least one space 230 positioned between the radiator and a dielectric sheet positioned on at least one surface of the radiator. Can be configured.

The at least one space 230 positioned between the radiator and the dielectric sheet positioned on at least one surface of the radiator includes at least one of adhesion means of the radiator and the dielectric sheet and corrosion preventing means of the radiator. Can be.

Adhesion means include an aqueous adhesive, a rubber adhesive, an epoxy adhesive, an instant adhesive, a vinyl adhesive, and the like, and fastening means other than the adhesive may be used. Corrosion protection means may be to form a barrier between the radiator and the dielectric sheet to plate the radiator or to separate the dielectric and the radiator.

In particular, the size of the space 230 located between the radiator and the dielectric sheet may be adjusted to match the synchronization characteristic with the received signal. Thus, the amount of the adhesion means and / or the corrosion protection means occupying the space may be adjusted to synchronize with the received signal.

3 is an exemplary view for explaining the configuration of an antenna using a dielectric sheet according to another embodiment of the present invention.

Referring to FIG. 3, the radiator and the dielectric sheet in the antenna using the dielectric sheet according to another embodiment of the present invention may be fastened using the fastening means 341 and 342.

In this case, the space 330 may be configured to fasten the dielectric sheet and the radiator by using fastening means instead of an adhesive means and / or a corrosion preventing means. The fastening means may be an adhesive means between the fastening means, the dielectric sheet and the radiator by using a separate plastic or the like, or may be a fastening means in which a mechanical groove is formed.

4 is an exemplary view for explaining the configuration of an antenna using a dielectric sheet according to another embodiment of the present invention.

Referring to FIG. 4, in the configuration of an antenna using a dielectric sheet according to another embodiment of the present invention, spaces 431 and 432 are formed on opposite sides of the radiator 420, and the dielectric sheets 411, 412 may be formed.

The radiator 420 and the dielectric sheets 411 and 412 may be formed to have a size corresponding to the resonance frequency of the predetermined service band. In addition, the configuration of the spaces 431 and 432 may also be formed in a size corresponding to the resonance frequency of the predetermined service band.

In particular, in the case of an antenna used in a mobile communication terminal, a predetermined service band includes a global positioning system (GPS), a global system for mobile telecommunication (GSM), a digital cordless system (DCS), a personal communication services (PCS), and a digital multimedia. The radiator 420, the dielectric sheets 411 and 412, and the space 431 should be configured to include at least one service band among service bands such as broadcasting, radio frequency identification (RFID), and wideband code division multiple access (WCDMA). , 432, should be formed to correspond to the resonant frequency of the service band.

For example, the size of the radiator 420, the dielectric sheets 411 and 412, and the spaces 431 and 432 may be configured to be suitable for GPS reception to form a resonance with the service band signal of the GPS service band band. .

5 is an exemplary view for explaining an antenna that does not use the dielectric sheet according to the prior art.

Referring to FIG. 5, in the antenna that does not use the dielectric sheet according to the related art, the antenna is composed of only a radiator expressed in red. Therefore, in order to match frequency synchronization with the service band, it is necessary to use a matching component such as an inductor and / or a capacitor to compensate for the length component of the antenna within the structure of the limited terminal.

6 is a measurement graph for explaining a standing wave ratio (SWR) of an antenna without using a dielectric sheet according to the related art.

Referring to FIG. 6, a vertical line represented by a dotted line in a standing wave ratio (SWR) graph of an antenna without using a dielectric sheet according to the related art corresponds to a resonance frequency of a desired service band, and the graph represented by a curve matches a radiator. Corresponds to the SWR of an antenna consisting of only components.

The SWR (Standing Wave Ratio) value is a value representing the reflection coefficient or the S11 value differently and means a height ratio of standing waves generated by reflection. Therefore, the SWR value is close to 1.000 when there is little reflection amount, and becomes closer to infinity as the reflection amount increases. In general, when the SWR value is less than 3.000, it can be used as an antenna.

Referring back to FIG. 6, it can be seen that the SWR value at 1.575 GHz, which is the resonant frequency of the service band, has a value of 2.7208 which is somewhat higher than the lowest point. It can be seen that.

7 is an exemplary view for explaining an antenna using a dielectric sheet according to an embodiment of the present invention.

Referring to FIG. 7, an antenna using a dielectric sheet according to an exemplary embodiment of the present invention may include placing the dielectric sheet at a portion indicated by a green dotted line on a radiator expressed in red. Thus, it can be seen that the dielectric sheet is used to compensate for the length component of the antenna within the limited terminal structure.

8 is a measurement graph for explaining a standing wave ratio (SWR) of an antenna using a dielectric sheet according to an embodiment of the present invention.

Referring to FIG. 8, a standing wave ratio (SWR) graph of an antenna using a dielectric sheet according to an embodiment of the present invention shows that an SWR value of 1.575 GHz, which is a resonance frequency of a service band, has a value of 1.5433. Therefore, it can be seen that it has a much smaller value than the SWR value when the dielectric sheet according to the prior art is not used, which indicates that the antenna using the dielectric sheet can exhibit better resonance characteristics in the service band. have.

9 is a measurement graph illustrating a radiation pattern of an antenna using a dielectric sheet according to an embodiment of the present invention.

Referring to FIG. 9, the radiation form of the antenna using the dielectric sheet according to an embodiment of the present invention is a graph measured under the assumption that the terminal is used in the vertical form. Since the radiation pattern shows a more abundant radiation upwards, it can be seen that it shows a good characteristic for receiving a GPS signal assumed as a service band.

10 is a block diagram illustrating a configuration of a mobile communication terminal having an antenna using a dielectric sheet according to an embodiment of the present invention.

10 is a mobile communication terminal having an antenna using a dielectric sheet according to an embodiment of the present invention, the mobile communication terminal having an antenna, the radiator for transmitting and receiving electromagnetic signals and at least one of the radiator An antenna 1010 including a dielectric sheet positioned on a surface of the antenna 1010; A memory unit 1020 for storing user data; And a controller 1030 for controlling the mobile communication function.

And at least one space located between the radiator and a dielectric sheet positioned on at least one surface of the radiator, wherein the radiator and the dielectric sheet have a size corresponding to a resonance frequency of a predetermined service band. Can be formed.

Since the rest of the configuration has been described while explaining the configuration of the antenna, redundant descriptions are omitted.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

Description of the Related Art

210: dielectric sheet 220: radiator

230: space 340: fastening means

1010: antenna 1020: memory part

1030: control unit

Claims

In an antenna using a dielectric,

A radiator for transmitting and receiving electromagnetic signals; And

And a dielectric sheet positioned on at least one side of the radiator.

The method of claim 1,

And at least one space located between the radiator and a dielectric sheet positioned on at least one surface of the radiator.

The method of claim 2,

And the space comprises at least one of a bonding means of the radiator and the dielectric sheet and a corrosion preventing means of the radiator.

The method of claim 1,

And the radiator and the dielectric sheet are fastened by using fastening means.

The method of claim 1,

And the radiator and the dielectric sheet are formed to have a size corresponding to a resonance frequency of a predetermined service band.

The method of claim 5,

The predetermined service band includes GPS (Global Positioning System), GSM (Global System for Mobile telecommunication), DCS (Digital Cordless System), PCS (Personal Communication Services), DMB (Digital Multimedia Broadcasting), RFID (Radio Frequency Identification) and WCDMA (Wideband Code Division Multiple Access) An antenna, characterized in that it comprises at least one service band of the service band.

The method of claim 1,

The dielectric sheet is polypropylene, poly styrene, poly ethylene tereph thalate, poly carbonate, polyvinylidene fluoride (PVDF), poly tetra fluorine An antenna characterized in that it comprises any one of ethylene (PTFE), poly amide (poly amide), poly phenylene sulfide (poly phenylene sulfide).

In a mobile communication terminal having an antenna,

An antenna comprising a radiator for transmitting and receiving electromagnetic signals and a dielectric sheet positioned on at least one surface of the radiator;

A memory unit for storing user data; And

A mobile communication terminal comprising a control unit for controlling a mobile communication function.

The method of claim 8,

10. The method of claim 9,

The space is a mobile communication terminal comprising at least one of the bonding means of the radiator and the dielectric sheet, the corrosion protection means of the radiator.

The method of claim 8,

The method of claim 12,

The predetermined service band includes GPS (Global Positioning System), GSM (Global System for Mobile telecommunication), DCS (Digital Cordless System), PCS (Personal Communication Services), DMB (Digital Multimedia Broadcasting), RFID (Radio Frequency Identification) and WCDMA (Wideband Code Division Multiple Access) A mobile communication terminal comprising at least one service band among service bands.

The method of claim 8,

The dielectric sheet is poly propylene, poly styrene, poly ethylene tereph thalate, poly carbonate, polyvinylidene fluoride (PVDF), poly tetra fluoro A mobile communication terminal, comprising any one of ethylene (PTFE), polyamide, and poly phenylene sulfide.