WO2015108237A1

WO2015108237A1 - Antenna characteristic correcting device of mobile phone cover

Info

Publication number: WO2015108237A1
Application number: PCT/KR2014/003156
Authority: WO
Inventors: 최재혁; 임성규
Original assignee: 주식회사 에스알비
Priority date: 2014-01-14
Filing date: 2014-04-11
Publication date: 2015-07-23

Abstract

The present invention relates to an antenna characteristic correcting device of a mobile phone cover. The present invention provides an antenna characteristic correcting device of a mobile phone cover characterized in that, a mobile phone cover (20) is provided with an antenna characteristic correcting means (30) capable of improving the characteristics of an antenna, and the antenna characteristic correcting means (30) has a magnetic material deposition layer (32) formed on a metal thin plate or a synthetic resin. The present invention configured as described above solves outright the problem of emission performance being reduced when a conventional mobile phone cover is used and can thus radically improve upon deteriorating antenna characteristics. Thus, product quality and reliability can be significantly improved. As a result, diverse requirements (needs) of users who are consumers can be met, and a good product image can be instilled.

Description

Antenna characteristic correction device of mobile phone cover

The present invention relates to an antenna characteristic correcting apparatus of a mobile phone cover, and more particularly, to solve the problem of deterioration of radio performance by using a conventional mobile phone cover and to significantly improve the deteriorated antenna characteristics. As a result, the quality and reliability of the product are greatly improved, so that a good image can be planted by satisfying user's desire for data service and call quality.

As is well known, the antennas used in the early stage of the mobile phone market used antennas derived from the outside, but for the purpose of enhancing aesthetics and practicality, they have been developed into so-called Intenna. Intenna).

The intenna is manufactured by a method of processing a metal plate, a printing method, a plating method, or the like. Intenna manufactured in this way is mainly located in the lower part or the upper part of the main body of the mobile phone, so that it can be separated from the communication chip or the mobile processor to reduce the interference and also the effect of being separated from the human body.

However, as the antenna is located in the body of the mobile phone, antenna characteristics are deteriorated. In other words, the incident or radiated radio waves in the process of transmitting and receiving through the antenna must pass through the mobile phone case, which causes a problem of deterioration such as distortion of the radio waves.

In addition, cell phone cases are made of polymer materials such as urethane, polycarbonate, and polyester, which are known to have inherent dielectric properties and are not uniform in thickness, causing distortion of incoming and outgoing radio waves.

In addition, the frequency band of radio waves used in mobile phones is recently used in various ways such as DMB, WIFI, bluetooth, RFID, and communication. In particular, since communication bands apply global communication bands in smart phones recently, the deterioration problem is worsening due to the change in dielectric properties for each frequency. In addition, in the case of smartphones, the mobile phone cover is used a lot because of the problem of the liquid crystal is broken. In this case, the radio wave has to pass through not only the mobile phone case but also the mobile phone cover having a dielectric constant considerably different from that of the mobile phone case.

In addition, conventionally, when an additional protective case is installed in a mobile phone, the radiation performance of TRP (Total Radiated Power) / TIS (Total Isotropic Sensitivity) decreases by more than 3 ~ 5 dB.

Conventionally, the following prior art documents have been filed and registered in order to solve the above problems, but the problem of improvement and deterioration of radioactivity deterioration has not been solved.

[Preceding technical literature]

(Patent Document 1) Korean Patent Registration No. 0984039 (name: a method of mounting an IMA on the inner surface of a mobile phone case to implement a plurality of antenna functions) has been registered.

The present invention has been proposed to solve the above problems of the prior art, it is to provide an antenna characteristic correction means to solve the problem of deterioration of radioactivity and to significantly improve the deteriorated antenna characteristics. For another purpose, a thin metal plate such as aluminum thin plate is printed, anodized, and sputtered to make the appearance of the phone look similar to the color of the mobile phone cover. In particular, when using the antenna characteristic correction device of the mobile phone cover of the present invention TRP (Total Radiated Power) 2 ~ 3 2, TIS (Total Isotropic Sensitivity) 3 ~ 4 ㏈ improved, it was confirmed that similar to the existing cell phone radiation performance.

In order to achieve the object of the present invention, the mobile phone cover 20 is provided with an antenna characteristic correction means 30 which can improve antenna characteristics, but the antenna characteristic correction means 30 is magnetic on a metal sheet or synthetic resin. Provided is an antenna characteristic correction device for a mobile phone cover, characterized in that the material coating layer 32 is formed.

As described in detail above, the present invention is to modify the antenna characteristic of the mobile phone and the mobile phone cover to form a magnetic material coating layer on a thin metal plate such as aluminum or synthetic resin such as PVC.

The present invention by the technical configuration described above is to solve the problem that the radiation performance is deteriorated by using the conventional mobile phone cover and to significantly improve the deteriorated antenna characteristics.

In addition, the present invention is to form a layer coated with barium ferrite powder on a metal thin plate such as aluminum inside the mobile phone cover to design a kind of auxiliary antenna that serves as a patch antenna to significantly improve the antenna characteristics deteriorated by using the mobile phone cover It is.

In addition, the present invention is to use a printing method, anodizing method, spattering method, such as aluminum thin plate to make the appearance of the phone beautifully similar to the color of the mobile phone cover.

In addition, the present invention is to facilitate the improvement of product quality and cost reduction because the metal thin plate such as aluminum and the manufacturing method is simple.

When the antenna characteristic correction device of the mobile phone cover of the present invention is used, TRP (Total Radiated Power) is improved by 2 ~ 3㏈ and TIS (Total Isotropic Sensitivity) is improved by 3 ~ 4㏈.

The present invention greatly improves the quality and reliability of the product due to the above-described effects, which is a very useful invention that can be used to plant a good image by satisfying various needs (needs) of consumers.

Hereinafter, described in detail with reference to the accompanying drawings a preferred embodiment of the present invention for achieving this effect are as follows.

1 is an exploded perspective view of an antenna characteristic correction apparatus for a mobile phone cover applied to the present invention;

Degree.

Figure 2 is a cross-sectional view of the main part of the antenna characteristic correction device of the mobile phone cover applied to the present invention

Degree.

10: cell phone

20: cell phone cover

30: antenna characteristic correction means

31: aluminum lamination

32: magnetic material coating layer

Antenna characteristic correction device of the mobile phone cover applied to the present invention is configured as shown in Figs.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The following terms are terms set in consideration of functions in the present invention, which may vary depending on the intention or custom of the producer, and their definitions should be made based on the contents throughout the specification.

First, the present invention solves the problem that the radiation performance is reduced by using a mobile phone cover by attaching a metal thin plate to the mobile phone cover 20, the antenna characteristic guarantee means 30 to significantly improve the degraded antenna characteristics (30) It provides an antenna characteristic correction device of the mobile phone cover included.

In addition, the antenna characteristic correction means 30 applied to the present invention is formed of a magnetic material coating layer 32 on a thin metal sheet or synthetic resin, such as aluminum having a thickness of 0.01 mm to 1 mm, size 0.5 mm to 3 cm, the mobile phone cover 20 Attach inside.

The magnetic material coating layer 32 is coated with a mixture of 10 to 28% by weight of methylvinyl polysiloxane, 70 to 80% by weight of barium ferrite and 2 to 10% by weight of reinforcing silica, or gold, silver, copper, iron, It is characterized by depositing any one or more metals or alloys selected from aluminum, stainless steel, nickel, manganese and zinc.

At this time, when the methyl vinyl polysiloxane is 10% by weight or less, there is a problem that it is easily cured. When the methylvinyl polysiloxane is 28% by weight or more, the mixing force with other components is weakened, so that the methylvinylpolysiloxane is preferably contained 10 to 28% by weight.

When the barium ferrite applied to the present invention is 70% by weight or less, the coercive force is weakened. When the barium ferrite is 70% by weight or more, it is preferable that the barium ferrite contains 70 to 80% by weight because it is difficult to sinter the powder. .

In addition, when the reinforcing silica applied to the present invention is 2% by weight or less, the heat resistance is weakened, and when the reinforcing silica is 10% by weight or more, the thermal shock resistance is weakened, and therefore, the reinforcement silica is preferably contained in an amount of 2 to 10% by weight.

On the other hand, the metal thin plate applied to the present invention is any one selected from gold, silver, copper, iron, aluminum, stainless steel, nickel, manganese, zinc to solve the problem that the radiation performance is lowered, and to improve the antenna characteristics deteriorated Preference is given to metals or alloys consisting of one or more.

The transparent thin plate may be made of any one selected from a transparent electrode, a transparent conductive film, and a transparent conductor, and may be selected from indium tin oxide (ITO), graphene (Graphene), and carbon nanotube (CNT). It is preferably made of either.

In addition, the transparency of the transparent thin plate is preferably made of a material having a sheet resistance of 300 Ω / ㎠ or less while more than 80%.

In this case, when the transparency is 80% or less, a person does not feel transparent, and when the sheet resistance is 300 Ω / ㎠ or more, since the high resistance does not serve as a conductor, the transparency of the transparent conductor sheet is 80% or more and the sheet resistance 300 It is preferable that it is made into / cm 2 or less.

On the other hand, the present invention may be variously modified and may take various forms in applying the above configuration.

And it is to be understood that the invention is not limited to the specific forms referred to in the above description, but rather includes all modifications, equivalents and substitutions within the spirit and scope of the invention as defined by the appended claims. It should be understood that.

Referring to the effect of the antenna characteristic correction device of the present invention cover configured as described above are as follows.

First, the present invention is to solve the problem that the radiation performance is reduced by using the conventional mobile phone cover, and to significantly improve the deteriorated antenna characteristics.

To this end, the present invention is formed of any one selected from a metal thin plate, such as aluminum, 0.01 mm to 1 mm, 0.5 mm to 3 cm in size, or a synthetic resin such as PVC or a transparent conductor thin plate formed in any one shape selected from circular, oval, and polygonal. It is.

The magnetic material coating layer 32 is a mixture of 10 to 28% by weight of methyl vinyl polysiloxane, 70 to 80% by weight of barium ferrite, 2 to 10% by weight of reinforcing silica, and then a metal thin plate or a transparent thin plate such as aluminum (31). It is characterized by hot pressing for 20 to 40 minutes at 200 to 300 ° C. and 100 to 200 kg / cm 2 after applying the coating to a thickness of 0.1 mm or less.

At this time, when the temperature is 200 ° C or less, the coating is not good, and when it is 300 ° C or less, the thin plate material is damaged, so that the coating temperature is preferably 200 to 300 ° C, and 20 minutes at 100 to 200 kg / cm 2. When the hot pressing is less than the coating is not good, if the hot pressing for more than 40 minutes, the heat resistance of the material is weakened, the hot pressing is preferably carried out for 20 to 40 minutes.

And it is preferable to include the barium ferrite so as to have a magnetic property of 0.1 to 400 gauss.

In this case, when the barium ferrite is less than 0.1 gauss, the magnetic properties are weakened. When the barium ferrite is less than 400 gauss, the barium ferrite has a magnetic property of 0.1 to 400 gauss because it has a magnetic effect on other mobile phones. desirable.

In addition, the magnetic material coating layer 32 gives a color to any one selected from a printing method, an anodizing method, and a sputtering method in a metal thin plate such as aluminum or a synthetic resin or transparent thin plate such as PVC.

On the other hand, the present invention is to give a blue color on one side of the metal thin plate or transparent conductor plate such as aluminum by anodizing method, the other side is 10 to 28% by weight of methyl vinyl polysiloxane, 70 to 80% by weight of barium ferrite, reinforced silica 2 to 10% by weight of each other was mixed and then coated on a thin metal plate such as aluminum or a transparent conductor plate, and hot pressed at 200 to 300 ° C. and 100 to 200 kg / cm 2 for 20 to 40 minutes to have a magnetic property of 400 gauss. will be.

In addition, the present invention makes yellow on one side of the metal thin plate or transparent conductor thin plate such as aluminum by printing method, and the other side is 10 to 28% by weight of methylvinyl polysiloxane, 70 to 80% by weight of barium ferrite, and 2 to 2 reinforcement silica. 10% by weight of each other is mixed and then coated on a thin metal plate such as aluminum or a transparent conductor plate with a thickness of 0.1 mm or less, and hot pressed at 200 to 300 ° C. and 100 to 200 kg / cm 2 for 20 to 40 minutes. It has a characteristic.

In addition, the present invention is to make brown on one side of the metal thin plate or transparent conductor plate such as aluminum by the spattering method, the other side of the methyl vinyl polysiloxane 10-28% by weight, barium ferrite 70-80% by weight, reinforcing silica 2 After mixing 10 wt% to each other and applying a thickness of 0.1 mm or less on a metal thin plate or a transparent conductor thin plate such as aluminum, hot pressing at 200 to 300 ° C. and 100 to 200 kg / cm 2 for 20 to 40 minutes It is to have the enemy characteristics.

In particular, the present invention is to apply a magnetic material, for example barium ferrite material on the inside of the mobile phone cover 20, for example, a metal thin plate such as aluminum or a transparent conductor plate (eg Ag _X Al _1-X, X: 0-0.1) It was attached to the mobile phone cover and experimented to measure the antenna characteristics. Metallic thin plates such as aluminum or transparent thin plates These metals are excellent in workability, easy to color by anodizing method, and relatively inexpensive.The reason for selecting barium ferrite as a magnetic material is that it is easy to control the magnetic properties according to the application amount. It was because it was cheap.

In addition, the thickness of the metal thin plate or transparent conductor thin plate such as aluminum was suitably in the range of 0.01 mm to 1 mm. The reason why the thickness of the aluminum sheet is limited in this way is that when the thickness of the aluminum sheet is less than 0.01 mm, it is difficult to manufacture the sheet and it is easily damaged during the manufacturing process. There were also disadvantages to sticking out of use.

In addition, the magnetic material coating layer 32 of the present invention is a mixture of 10 to 28% by weight of methyl vinyl polysiloxane, 70 to 80% by weight of barium ferrite, 2 to 10% by weight of reinforcing silica and then on a metal thin plate 31 such as aluminum After coating at a thickness of 0.1 mm or less, it was prepared by hot pressing at 200 to 300 ° C. and 100 to 200 kg / cm 2 for 20 to 40 minutes, and magnetic properties of 0.1 to 400 gauss were useful. At this time, when the magnetic strength of the aluminum sheet coated with barium ferrite magnetic material was lower than 0.1 gauss, the magnetism was too low, so the effect was insignificant. If it was higher than 400 gauss, the price was high and there was a possibility of affecting other electronic components.

And the size of the aluminum thin plate coated with barium ferrite of the present invention was useful in the shape of a square, circle or arbitrary within the range of 0.5 mm to 3 cm depending on the shape of the mobile phone antenna. The reason for limiting the size of the aluminum sheet coated with the aluminum sheet or the barium ferrite was that the effect was insignificant when smaller than 0.5 mm, and when the size was larger than 3 cm, the radio wave shielding effect was increased, resulting in deterioration of antenna characteristics.

In addition, the above-mentioned metal plate is similar to the color of the cell phone cover to be attached to consider the appearance, as a method of coating the color, printing method, anodizing method, sputtering method was used.

The present invention as described above will be described with reference to the following Examples.

(Example 1)

One side of a thin metal plate such as aluminum having a thickness of 0.1 mm or a transparent conductor plate was made black by a printing method, and then manufactured to a diameter of 1 cm. A smart phone on the market and a mobile phone cover for the smart phone were prepared and the aluminum foil was attached to the inside of the cover as shown in Figs. 1 and 2, and then coupled to the smart phone, and then the antenna characteristics were examined. The results are shown in Table 1 below.

(Example 2)

One side of a thin metal plate such as aluminum having a thickness of 0.5 mm or a transparent conductor plate was made red by anodizing method, and then produced in a rectangular shape having a major axis of 3 cm and a minor axis of 2 cm. A commercially available smartphone and a mobile phone cover for the smartphone were prepared, the aluminum thin plate was attached to the inside of the cover, and then coupled to the smartphone, and the antenna characteristics were investigated. The results are shown in Table 1.

(Example 3)

One side of the thin aluminum plate 1 mm thick was anodized, and the other side was 10 to 28% by weight methylvinylpolysiloxane, 70 to 80% by weight barium ferrite, reinforced silica Aerosil R-972 (product surface Degussa) After mixing with 2 to 10% by weight, it is applied on a metal plate and hot pressed for 20 to 40 minutes at 200 to 300 ° C. and 100 to 200 kg / cm 2 to have magnetic properties of 400 gauss, followed by 0.5 cm long axis and 1 cm short axis. It was made into the rectangle of. A commercially available smartphone and a mobile phone cover for the smartphone were prepared, the aluminum thin plate was attached to the inside of the cover, and then coupled to the smartphone, and the antenna characteristics were investigated. The results are shown in Table 1.

As described above, the present invention focused on a patch antenna to solve the problems of the prior art. The patch antenna is a type of resonant antenna having a metal plate bonded to it. The patch antenna is made by attaching a metal thin film on a low loss and low dielectric material. The present invention judged that the degradation of antenna characteristics in a mobile phone is caused by a mobile phone case and a mobile phone cover which act as a dielectric. The present invention has been described by attaching a thin metal plate between the mobile phone case and the mobile phone cover, that is, inside the mobile phone cover. The deterioration of antenna characteristics could be solved and the experiments were conducted and satisfactory results were obtained. Also, paying attention to the fact that the electromagnetic wave received and transmitted from the antenna has not only an electric field but also a magnetic field component. The magnetic powder is applied to a thin metal plate and adhered to the cell phone cover to measure the antenna characteristics. I confirmed it.

Table 1

	When applying the prior art (dbm)		Application of the present invention (dbm)		Improvement (db)
	TIS	TRP	TIS	TRP	TIS	TRP
EGSM	-93.65	18.79	-97.38	23.77	3.73	4.98
GSM850	-97.24	24.85	-100.8	26.99	3.56	2.14

As a result of comparing and comparing the conventional mobile phone cover and the mobile phone cover of the present invention as described above, the present invention can confirm that the frequency band is improved compared to the prior art.

The technical idea of the antenna characteristic correcting apparatus of the present invention mobile phone cover is actually capable of repeating the same result, and in particular, by implementing the present invention, it is possible to promote technology development and contribute to industrial development, so it is worth protecting.

Claims

In the mobile phone cover 20, the antenna characteristic correction means 30 that can improve the antenna characteristics, the antenna characteristic correction means 30 is formed of a magnetic material coating layer 32 on a thin metal plate or synthetic resin Antenna characteristic correction device for a mobile phone cover, characterized in that.
The method of claim 1,

The magnetic material coating layer 32,

10 to 28% by weight of methylvinylpolysiloxane, 70 to 80% by weight of barium ferrite, and 2 to 10% by weight of reinforcing silica.
The method of claim 1,

The magnetic material coating layer 32,

The antenna characteristic correction device of the mobile phone cover, characterized in that formed of at least one metal or alloy selected from gold, silver, copper, iron, aluminum, stainless steel, nickel, manganese, zinc.
The method of claim 1,

The metal sheet is,

The antenna characteristic correction device of the mobile phone cover, characterized in that made of at least one metal or alloy selected from gold, silver, copper, iron, aluminum, stainless steel, nickel, manganese, zinc.
The method of claim 1,

Synthetic resin,

Device for calibrating antenna characteristics of a mobile phone cover, characterized in that made of polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyurethane, polyacrylate.
The method of claim 2,

And the barium ferrite coating device having a magnetic property of 0.1 to 400 gauss.
The method of claim 1,

The magnetic material coating layer 32,

An antenna characteristic compensator for a mobile phone cover, characterized in that the color is given to any one selected from a printing method, an anodizing method, and a sputtering method in a metal thin plate or a transparent conductor thin plate such as aluminum.