WO2011115404A2

WO2011115404A2 - Antenna having complex internal structure

Info

Publication number: WO2011115404A2
Application number: PCT/KR2011/001787
Authority: WO
Inventors: 강혁진; 이재호; 김국현; 하지훈
Original assignee: 주식회사 네오펄스
Priority date: 2010-03-15
Filing date: 2011-03-15
Publication date: 2011-09-22
Also published as: KR101024350B1; WO2011115404A3; CN103493291A

Abstract

The present invention relates to an antenna having an complex internal structure, and more particularly to an antenna having an complex internal structure which increases antenna design convenience through an extension at an available area of the antenna and can easily form a customized antenna structure with respect to a multi-band by composing the antenna with only a conductive metal body and providing the antenna which can freely design an antenna structure so as to assure optimum reception sensitivity according to band characteristics. The present invention can assure design autonomy according to the band characteristics and can largely improve a bandwidth control characteristic by arbitrarily controlling intensity and characteristics according to an increase of a contact area between a radiator disposed perpendicularly to a printed circuit board and a dielectric used for fixing the radiator.

Description

Built-in composite antenna

The present invention relates to a built-in composite structure antenna, and more particularly, to provide an antenna that can be freely designed to the antenna structure to ensure that the antenna is composed only of a conductive metal and to ensure the optimum reception sensitivity according to the band characteristics The present invention relates to a built-in composite antenna capable of increasing antenna design convenience and easily forming a customized antenna structure for multi-band.

With the development of mobile communication networks, the development of mobile communication terminals for accommodating various mobile communication standards and bands according to each standard has been continuously progressed. The mobile communication network is connected with communication networks providing heterogeneous services and is progressing as an integrated infrastructure network. Through this, large data transmission is processed in real time as well as simple voice signal exchange, SMS service, multimedia service and web service. An integrated infrastructure network will be built.

Accordingly, the mobile communication terminal has also been continuously developed to transmit and receive various data provided by mobile communication networks providing various services as described above, and the mobile communication is primarily used to stably receive services provided by various communication networks. The antenna configuration of the terminal plays a very important role.

In particular, the antenna has recently been replaced by a built-in antenna mounted in the mobile communication terminal in place of the existing load antenna, along with the demands of portability and aesthetics of the mobile communication terminal, and various Antennas of the form are emerging.

The existing built-in antenna is generally composed of a dielectric (carrier) and a radiator, the dielectric is made of a plastic structure, the radiator is formed with a protective layer for protecting the metal in a pattern composed of a highly conductive metal. .

The conventional built-in antenna as described above is manufactured in the following manner.

First, there is a method of manufacturing the configuration of the built-in antenna in a general assembly method. That is, the radiator is fastened to the surface of the dielectric through a fastening means.

In the conventional assembly method as described above, in the process of fastening the radiator to the dielectric, as shown in FIG. 1, the radiator 20 should be folded and fastened according to the appearance of the dielectric 10. Due to this, the cover 30 of the mobile communication terminal coupled to the dielectric 10 and the radiator 20 is spaced apart from each other to form a predetermined space with the built-in antenna, resulting in poor space efficiency.

As a second method to improve this, manufacturing methods such as laser direct structuring (LDS) and double injection have been introduced. As such, as shown in FIG. 2, the curved surface of the radiator 20 may be manufactured according to the curved shape of the exterior of the dielectric 10, thereby preventing the formation of a space between the radiator 20 and the cover 30. .

First, as shown in FIG. 3, the injection molding the dielectric 20 having the part where the radiator 20 is to be formed by inserting the radiator 20 into a mold for generating the dielectric 10 after injecting the radiator 20. After the injection 10, the radiator 20 is inserted into the injected dielectric 10.

Such a double injection method is a manufacturing method suitable for mass production because of the high cost and difficulty of modification because a plurality of molds for manufacturing the cover and the injection molding are required, and is difficult to apply to a small quantity production.

In addition, since the size of the radiator is limited depending on the mold shape, it is difficult to construct a complex radiator, and the injection process is cumbersome, resulting in low yield and significant manufacturing cost. In addition, due to the above problems, the internal antenna manufactured by the double injection method has a small portion of the antenna area, and thus has low radiation characteristics and a thin plating thickness, thereby decreasing reliability due to damage, and a portion of the dielectric region in comparison with the antenna area. There are relatively many problems that the efficiency of the portion corresponding to the dielectric region is low.

Meanwhile, as shown in FIG. 4, the LDS is etched in the resin 40 for the LDS to form the radiator 20 through the laser 30 and then the metal plating corresponding to the radiator 20 is performed. In addition, a protective layer is formed on the metal plating to manufacture a built-in antenna.

However, like the double injection method, the LDS also requires a dedicated resin for the LDS to form a dielectric, and the dedicated resin for the LDS has the same problem caused by the double injection type dielectric. In addition, the cost of the dedicated resin for LDS is not only significant, but also the cost of the laser device required for processing the dedicated resin for LDS is significant, resulting in a significant increase in the manufacturing cost of the entire antenna. In addition, the low yield of the antenna using the LDS method has a low cost advantage.

According to the present invention, the antenna is composed of only a single metal body to maximize the utilization area of the radiator, thereby improving the reception performance of the antenna and arbitrarily varying the strength and characteristics through the dielectric arrangement according to the increase in the contact area to the radiator. It is an object of the present invention to provide an antenna that can be adjusted and at the same time improve the bandwidth control characteristics and greatly improve the autonomy of the embedded antenna design.

In addition, an object of the present invention is to provide an antenna that can easily arrange and process the antenna according to the case of the mobile communication terminal to increase the space utilization of the mobile communication terminal and ensure convenience in terms of antenna arrangement.

In addition, it is an object of the present invention to provide a unique antenna arrangement method that can improve the performance of the antenna while increasing the structural strength of the antenna, unlike the conventional antenna arrangement method.

In addition, the present invention is to implement a MIMO antenna with a minimum of a metal body, the object is to apply the MIMO antenna to small devices.

A built-in composite antenna built in a terminal according to the present invention for achieving the above object, comprising a circuit board installed in the terminal, and a radiator installed on the circuit board and bent in accordance with the band characteristics, The radiator is an antenna body that is self-supported while filling a predetermined space by standing up with respect to the substrate in a state of being bent in the longitudinal direction a plurality of times, and a portion of the antenna body is bent into an internal space, thereby forming a radiation area within the predetermined space. It includes an extended radiation area extension.

In this case, the antenna body and the radiation area extension part may be formed by bending the conductive metal developed by the press working method to have a band characteristic or by injecting the molten conductive metal into the casting through the MIM or DIE-CASTING method. .

In addition, the band characteristic may be determined using a coupling or a length generated between adjacent antennas and the radiation area extension part.

In addition, the built-in composite antenna according to the present invention is provided with a groove corresponding to the shape of the antenna body and the radiation area expansion portion to be inserted into the groove and the antenna body and the radiation area expansion portion is inserted into the groove It may further include a dielectric fixed to the substrate with a radiator.

At this time, by adjusting the capacitance component according to the contact area of the antenna body, the radiation area expansion unit and the dielectric, it is possible to adjust the band characteristics of the antenna.

On the other hand, a convex portion is provided in a part of the plane of the antenna body, the dielectric is provided with a jaw that can be caught by the convex portion, the convex portion is caught by the jaw to fix the antenna body and the radiation area expansion portion to the dielectric, The antenna body is provided with a hook portion having a flat end in the shape of a hook, and the dielectric is provided with a jaw corresponding to the hook portion at a portion thereof, such that the radiator is fixed to the dielectric by fastening the hook portion and the jaw. Can be.

In order to achieve the above object, a built-in hybrid antenna built in a terminal according to an embodiment of the present invention is connected to an individual feeder and disposed adjacent to each other, and is perpendicular to the circuit board of the terminal, And a plurality of radiators which are bent a plurality of times, a coupling part coupled to each of the radiators, and a connection part connecting the coupling parts to each other, and a support part supporting the coupling part and the connection part perpendicular to the board of the terminal. A configured antenna plate.

In this case, the arrangement and the bending characteristics of the antenna plate and the radiator may be determined according to the band characteristics of each radiation region defined by the coupling part of the antenna plate and the radiator coupled to the coupling part.

In addition, the arrangement between the coupling portion of the antenna plate and the radiator may be different for each radiation region defined as the coupling portion of the antenna plate and the radiator coupled to the coupling portion.

In addition, the arrangement between the coupling portion of the antenna plate and the radiator may be the same for each radiation region defined by the coupling portion of the antenna plate and the radiator coupled to the coupling portion.

In addition, the band characteristics of each radiation region defined by the coupling portion of the antenna plate and the radiator coupled to the coupling portion may include the separation distance between the antenna plate and the radiator, the size of the coupling portion of the antenna plate, and the vicinity of the radiator and the antenna plate. It may vary depending on the part length, the distance between the radiators, and the bending characteristics of the radiators.

Built-in composite antennas built in the terminal according to another embodiment of the present invention for achieving the above object is connected to the individual feeder and disposed adjacent to each other, vertically arranged on the board of the terminal and at the same time depending on the band characteristics A plurality of radiators having a set bending characteristic, an insulator disposed on the board and configured to cover the plurality of radiators, a coupling part disposed on the insulator and coupled to the radiator and the coupling part, respectively; It includes an antenna plate having a connecting portion.

In this case, the insulator may determine the separation distance between the radiator and the antenna plate according to the band characteristics.

In order to achieve the above object, a built-in composite antenna built in a terminal according to another embodiment of the present invention is connected to an individual feeder and disposed adjacent to each other, and vertically disposed on a board of the terminal, And a plurality of radiators having a predetermined bending characteristic, an antenna plate disposed on the board and having a coupling part coupled to the radiator and a connection part connecting the coupling parts to each other.

In this case, the band characteristics of each radiation region defined by the coupling part of the antenna plate and the radiator coupled to the coupling part may be a distance between the antenna plate and the radiator, the size of the coupling portion of the antenna plate, and the vicinity of the radiator and the antenna plate. It may vary depending on the part length, the distance between the radiators, and the bending characteristics of the radiators.

According to the present invention, after the vertical arrangement on the circuit board and additionally bent the plane extending in the vertical direction can be configured to the built-in antenna only with a radiator consisting of a single metal body, while maximizing the space in which the built-in antenna is built in the band characteristics Accordingly, by bending the antenna in various ways, an antenna having a complex structure may be provided to provide an antenna optimized for a specific band.

In addition, the present invention can apply a dielectric to fix the radiator and the radiator disposed vertically on the circuit board, through which the strength and characteristics can be arbitrarily adjusted with sufficient contact area to ensure design autonomy according to the band characteristics In addition to this, there is an effect that can greatly improve the bandwidth control characteristics.

In addition, the present invention can vertically arrange the radiator with the circuit board, through which the space formed between the circuit board and the case of the terminal can be utilized, so that there is a high degree of freedom of pattern implementation, various band characteristics and specificities such as PIFA, Monopole, Loop, etc. There is an effect of providing a custom antenna corresponding to the shape.

In addition, the present invention can provide precisely and quickly the curved antenna through the MIM or DIE-CASTING method using casting as well as the bent antenna configured by the bending method through the press processing, thereby reducing product yield and manufacturing cost Through this, it is possible to lower the product cost.

In addition, the present invention has the effect of freely designing the antenna corresponding to the band characteristics by using the coupling phenomenon according to the signal interference between the adjacent radiator parts according to the thickness and width configuration and bending configuration of the radiator.

In addition, the present invention can implement a MIMO antenna with improved isolation characteristics with only a minimum of a metal body, there is an effect that can be embedded and applied to the MIMO antenna in small devices.

1 is a view showing the structure of an existing built-in antenna manufactured according to the general assembly process.

Figure 2 is a view showing the structure of an existing built-in antenna manufactured according to LDS or double injection.

3 is a view showing a manufacturing process of the existing internal antenna according to the double injection.

4 is a view showing a manufacturing process of an existing internal antenna according to the LDS.

5 is a perspective view of a built-in composite antenna according to the present invention.

6 is a view showing a manufacturing method of a built-in composite antenna according to the present invention.

7 is a view showing a combination of a radiator and a dielectric included in the integrated composite antenna according to the present invention.

8 is a view showing a coupling method of a radiator and a dielectric included in the integrated composite antenna according to the present invention;

9 is a diagram showing the implementation of a built-in composite antenna according to the present invention as a MIMO antenna;

10 is a graph showing the S-parameter characteristics of the integrated composite antenna according to the present invention.

The present invention provides a built-in composite structure antenna using a conductive radiator maximizing the antenna utilization area. To this end, the radiator is vertically arranged with the circuit board configured in the terminal, part of the radiator can be bent in a plane different from the plane of the radiator vertically arranged with the circuit board, thereby extending the antenna utilization area and optimized for the band characteristics It is possible to provide an antenna having a complex structure.

That is, the present invention can directly manufacture the corresponding antenna according to the band characteristics to be received only by the radiator by directly processing the radiator constituting the antenna and directly placed on the circuit board of various portable terminals including the mobile communication terminal. To this end, the radiator according to the present invention is disposed and fixed in a vertical form on the circuit board of the mobile communication terminal, thereby ensuring stability and performance improvement while maintaining a thick pattern line of the radiator.

In addition, the antenna can maximize the space between the cover of the circuit board and the mobile communication terminal that has not been used through the vertical arrangement to the maximum, it is possible to freely design the shape of the antenna, which is the autonomy of the antenna band characteristics To improve.

Built-in composite antenna according to the present invention as described above will be described in detail through the drawings.

5 is a perspective view of a built-in composite antenna according to the present invention, the built-in composite antenna according to the present invention may be composed of only a radiator 100 of a conductive metal as shown, the radiator 100 is as follows It is composed.

The radiator 100 is perpendicular to the circuit board 200 in a state in which the radiator 100 is bent a plurality of times in the longitudinal direction to fill a predetermined space, and supports the antenna body 101 and a part of the antenna body 101. Is bent into the inner space may be composed of a radiation area expansion unit 102 to extend the radiation area in the predetermined space.

In this case, the bending of the antenna body 101 may be adjusted several times to have an optimal signal sensitivity for a band characteristic desired by the user. That is, not only the reception band characteristic through the length of the antenna body 101 is determined, but also the coupling generated between adjacent surfaces of the antenna body 101 bent according to the bending frequency, and interference through the coupling. The bandwidth may be adjusted by using a characteristic such as adjusting the electrical length of the antenna body 101 through the signal.

In addition, the radiation area expansion unit 102 is composed of a part of the antenna body 101, the antenna body 101 may be bent in a direction different from the direction in which the antenna body 101 is bent a plurality of times, it is to inefficiently expand the space In order to prevent it, it is preferable that the antenna body 101 is bent into an inner space. Therefore, according to the bending characteristics of the radiation area expansion unit 102, the radiation area expansion unit 102 along with the radiation area expansion according to its length, the antenna body adjacent to the radiation area expansion unit 102 ( It is also possible to adjust the bandwidth through couplings occurring between some faces of 101.

As an embodiment of the configuration of the radiator 100 including the configuration of the antenna body 101 and the radiation area expansion unit 102 as described above, the antenna perpendicular to the circuit board 200 It is composed of a body 101, and the radiation area expansion unit 102 is configured horizontally with respect to the circuit board 200, to provide an antenna composed of a radiator 100 is mixed with a vertical plane and a horizontal plane can do.

As described above, the built-in composite antenna including the radiator 100 having the vertical plane and the horizontal planar structure using only a single metal is adjacent to the length of the radiator 100 and the bending characteristics of the radiator 100 as described above. The band characteristics are determined by the interference between the radiator lines, and the distance between radiator lines and the area of the radiator can be secured compared to the existing internal antennas while utilizing the space occupied by the existing internal antennas. It is possible to reduce the radiation area and to maximize the radiation area. In addition, the antenna gain and efficiency of the radiator 100 may be increased by securing the radiation area.

In addition, through the radiator 100 upright perpendicular to the above-described circuit board 200 can be configured to be thicker than the thickness of the conventional antenna radiator that is implemented in a planar shape on a conventional substrate without being a separate auxiliary configuration Since it can be used, there is an advantage that the manufacturing convenience and cost is reduced. In addition, by bending a portion of the radiator 100 of the vertical plane structure to have a horizontal plane with respect to the circuit board 200 can provide a built-in composite antenna having a variety of forms optimized antenna for a specific band Can be provided. In addition, in addition to the horizontal plane structure can be applied to have a variety of complex structures according to the direction or angle of bending to the radiator 100, it is possible to produce a curved shape.

Therefore, since the radiator configuration of the existing built-in antenna must be configured in consideration of the size of the circuit board as well as the dielectric to which the radiator is coupled, the antenna pattern corresponding to the band characteristics and the antenna pattern shape that can maintain the best signal sensitivity can be freely designed. The present invention can not be solved through an antenna design that utilizes the space formed between the circuit board 200 and the cover of the mobile communication terminal by vertically disposing the radiator 100 as described above with the circuit board 200. Can be.

In addition, while the area of the existing built-in antenna is made of a dielectric most relatively small area of the radiator 100 to perform the actual signal transmission and reception, the radiation efficiency is low, the present invention can also provide a built-in antenna consisting of only the radiator 100 The radiation efficiency can be improved.

In addition, according to the thickness and width configuration of the radiator 100 or the bending shape of the radiator 100 as described above, an antenna corresponding to a band characteristic may be freely used by using a coupling phenomenon due to signal interference between adjacent radiator lines. It can be configured, and the convenience of production can be increased.

Meanwhile, the complex structure shape of the radiator determined according to the band characteristics may be manufactured through a manufacturing method as shown in FIG. 6.

In a first manufacturing method, after the radiator 100 is developed by using a general press processing technique illustrated in FIG. 6 (a), the radiator 100 is bent in correspondence to the bent shape, and the mobile communication terminal The production is completed by cutting to fit the cover. In this case, a protruding portion may be formed at one side of the radiator to correspond to the hole of the circuit board so as to be stably fixed to the substrate.

In a second manufacturing method, as shown in FIG. 6 (b), a casting for a bent or curved shape of the radiator 100 determined according to a band characteristic or a structure of the terminal cover on which the radiator 100 is mounted is manufactured. After the MIM or DIE-CASTING method may be used to inject the molten conductive metal into the casting.

Such a MIM or DIE-CASTING method can directly obtain the bent shape of the radiator 100 without any additional processing, and is a curved surface treated around the bent boundary portion of the bent shape of the radiator 100. The shape can also be easily manufactured to increase the precision. In this case, the curved shape may be configured in accordance with the shape of the upper cover of the mobile communication terminal in a portion adjacent to the radiator 100 in consideration of the shape of the upper cover of the mobile communication terminal, the radiator having a curved shape The upper cover of the mobile communication terminal can be assembled to be stably coupled to the upper surface of the 100.

Among the manufacturing methods for the built-in composite structure antenna as described above, a method using a general press processing technology can be used for a small quantity production, and the MIM or DIE-CASTING method can be used for mass production, so that the operator can You can freely choose the way you want, greatly reducing production costs.

On the other hand, the fixing of the radiator 100 may be formed by forming a protrusion in the manufacturing process of the radiator as described above on one side of the radiator 100, inserted into the hole of the circuit board and soldered to fix it. One side of the radiator 100 may be configured by forming a terminal having a “presser foot” structure and soldering it to the circuit board. In addition, the terminal formed in a circular structure on one side of the radiator 100 may be fastened to the substrate through fastening means such as bolts, thereby providing assembly convenience.

In addition to the fixing method described above, the built-in composite antenna according to the present invention may be composed of only the radiator 100 as shown in FIG. 7, but the dielectric is used for stably fixing the radiator 100 to the circuit board 200. 300 may be utilized.

Referring to this in detail with reference to Figure 7, Figure 7 (a) forms a radiator 100 of a composite structure formed according to the band characteristics, and generates an auxiliary structure into which the radiator 100 can be inserted as the dielectric 300 can do.

The dielectric 300 has an insertion hole of a composite structure corresponding to the pattern of the radiator formed of a composite structure, and as a result, the radiator 100 is inserted into the dielectric hole 300 as shown in FIG. ) Is inserted into the dielectric 300, and one end of the dielectric 300 is fixed to the circuit board 200 so that the radiator 100 perpendicular to the circuit board 200 is formed in FIG. As shown in FIG. 2), it may be prevented from shaking on the circuit board 200 to be stably fixed to the circuit board 200.

In addition, through the combination of the radiator 100 and the dielectric 300, similar to the cost of manufacturing the existing antenna, the adjustment of the capacitance component according to the expansion of the contact area between the surface of the radiator 100 and the surface of the dielectric 300 The width can be greatly improved, which can greatly expand the bandwidth selection.

On the other hand, in order to assist the stable fixing of the radiator 100 and the dielectric 300, an additional fastening method may be applied between the radiator 100 and the dielectric 300.

Referring to FIG. 8, FIG. 8 (a) illustrates an example of an antenna configuration. As shown, a convex portion 110 is formed on one end surface of the radiator 100 and the dielectric 300 is shown. The convex portion 110 is formed on the jaw 301 to be caught, and when the radiator 100 is coupled to the dielectric 300, the convex portion 110 is caught by the jaw 301. The radiator 100 may be prevented from escaping from the dielectric 300.

8 (c) is a view showing an embodiment of another antenna configuration, in which a hook portion 120 is formed on a part of the radiator 100 in a hook-shaped structure, and the part of the dielectric 300 is When forming the jaw 301 that the catching portion 120 can be caught, and the radiator 100 is coupled to the dielectric 300, the catching portion 120 is caught by the jaw 301, the radiator 100 May be prevented from escaping from the dielectric material 300.

Through the structure of FIG. 8, the radiator 100 is stably fixed to the dielectric 300, and prevents the radiator 100 from tilting in a specific direction or leaving the circuit board 200. Can be received.

On the other hand, the upper cover (case) of the mobile communication terminal is coupled to the upper portion of the fixed radiator 100 as described above, wherein the radiator 100 or the dielectric 300 is cut according to the shape of the upper cover The top cover may be configured to be stably coupled. Through such a configuration, the radiator 100 or the dielectric 300 may be freely configured in a space between the upper cover of the mobile communication terminal and the circuit board 200, and has a width or a thickness greater than that of a conventional internal antenna. There are few restrictions in the configuration of.

On the other hand, the built-in composite antenna according to the present invention can be implemented to have the characteristics of the multi-layer antenna of the registered application No. 10-0922230. The multilayer antenna is a multi-layered antenna in which a plurality of antenna strips are disposed adjacent to each other, and an antenna plate is formed to be spaced apart from the antenna strips, so that coupling occurring between the antenna strips is generated between the plate and the antenna strip. By improving the isolation characteristics by blocking coupling between antenna strips, the present invention can operate as a MIMO antenna.

Such characteristics of a multilayer antenna operating as a MIMO antenna can be implemented through the built-in composite antenna of the present invention.

This will be described in detail with reference to FIG. 9. As shown in FIG. 9A, a plurality of

radiators

130 and 140, which are vertically upright with respect to the substrate and are bent a plurality of times and have a complex structure, respectively, are provided with individual feeders. It can be arranged in connection. In addition, it is provided with a coupling portion 401 and a coupling portion 402 for coupling the coupling portion 401 and spaced apart from the plane of each of the radiator (130, 140), and vertically on the substrate without a separate feeder An antenna plate including a coupling part 401 and a support part 403 for supporting the coupling part 402 so that a plane of the coupling part 401 and the connection part 402 is disposed perpendicular to the substrate. 400 may be spaced apart from the plurality of

radiators

130 and 140 in a predetermined space to form a built-in composite antenna having characteristics of the MIMO antenna.

At this time, the coupling characteristics between the

radiators

130 and 140 and the antenna plate 400 may prevent the signal generated from one radiator from being induced into another radiator to improve the isolation characteristics. An internal composite antenna may be configured to operate as the MIMO antenna.

That is, the flow of current induced in the antenna plate 400 by the coupling with the radiator on one side is blocked by the capacitance component formed between the radiator and the antenna plate on the other side and does not interfere with each other, thus functioning as the MIMO antenna. Can be done.

In addition, when the coupling position between each

radiator

130 and 140 and the antenna plate 400 is adjusted, the characteristics of the antenna can be adjusted in various ways. Through such adjustment, the resonance point can be set differently for each

antenna

130 and 140. In this case, a tunable antenna using a switching antenna can be configured.

In addition, by adjusting the arrangement of the plurality of

radiators

130 and 140 and the adjacent antenna plate 400, a switching antenna having different band characteristics can be easily configured, and a signal that is inductive to each other is blocked so that MIMO or smart The performance of an antenna using the same band as an antenna can be improved.

In addition, unlike the patent of the multi-layered antenna, there is no need for an insulating layer, and thus it is possible to provide a MIMO antenna which can greatly increase manufacturing convenience while further reducing antenna configuration costs. In addition, by arranging the plurality of

radiators

130 and 140 and the antenna plate 400 vertically, it is possible to provide the MIMO antenna optimized for more various band characteristics by maximizing the above-mentioned space utilization.

In addition, in addition to the configuration shown in FIG. 9 (a), as shown in FIG. 9 (b), the built-in composite antenna may include the plurality of

radiators

130 and 140 of the composite structure respectively connected to individual feeding portions of a circuit board. The dielectric 500 may be disposed to cover the antenna plate 500, and the antenna plate 400 having a planar structure is disposed on the dielectric 500, so that the plurality of

radiators

130 and 140 and the antenna plate 400 are disposed. By allowing a predetermined space to be formed therebetween, coupling may occur between the

radiators

130 and 140 and the antenna plate 400, and may have isolation characteristics through the coupling.

In addition, as shown in FIG. 9C, the plurality of

radiators

130 and 140 respectively connected to the individual feeding parts are disposed on a circuit board, and the planar structures spaced apart from the

respective radiators

130 and 140 are disposed. The antenna plate 400 may be directly configured on the circuit board to cause coupling between the

radiators

130 and 140 and the antenna plate 400 to occur.

In this case, the antenna antenna plate 400 of FIGS. 9 (b) and 9 (c) may take various structures along the structure of the dielectric 500 or the circuit board, and may have a curved shape. Do.

As described above, the plurality of

radiators

130 and 140 and the antenna plate 400 described in FIG. 9 form a pair of symmetrical antenna units, and the plurality of

radiators

130 and 140 respectively feed different signals. It acts as the feed and radiate parts of independent antennas. In addition, both end portions of the plurality of

radiators

130 and 140 and the adjacent antenna plate 400 operate as antennas fed by coupling, respectively, and adjacent antenna induced signals are connected by one end of the connecting portion connecting the both ends. Is cut off and noise is removed.

At this time, the distance between the

radiator

130 and 140 and the antenna plate 400, the size of the coupling portion (both sides) of the antenna plate 400, the size of the

radiator

130 and 140 and the antenna plate 400 The band characteristic may be determined by an adjacent portion length, a distance between the

radiators

130 and 140, bending characteristics of the

radiators

130 and 140 and the antenna plate 400, and the like.

In addition, not only the antenna length can be extended by the coupling effect, but also the interference between the antenna portions can be suppressed while the band characteristic of the antenna can be prevented from changing. Therefore, the integrated composite antenna according to the present invention is a MIMO antenna. The MIMO antenna can be configured only by the configuration of the plurality of

radiators

130 and 140 and the antenna plate 400, which can have a great advantage in terms of cost reduction.

FIG. 10 shows S parameter characteristics when the integrated composite antenna is configured to have MIMO antenna characteristics according to an embodiment of the present invention. S21 of the graph is shown in dB scale, and S11 and S22 are voltage standing waves. The ratio of ratio VSWR is shown. As shown, S11 and S22 have a voltage standing wave ratio of 2.5 or less, and S21 is improved in the use band of 2.5 to 2.7 GHz, indicating that interference between antennas is greatly reduced.

Claims

In the built-in antenna built in the terminal,

A circuit board installed in the terminal; And

Installed on the circuit board, and includes a radiator bent in accordance with the band characteristics,

The radiator is

An antenna body which is self-supported while filling a predetermined space by standing up with respect to the substrate in a state of being bent a plurality of times in a longitudinal direction; And

A portion of the antenna body is bent into an inner space, and includes a radiation area extension that extends a radiation area within the predetermined space,

And a dielectric having a groove corresponding to the shape of the antenna body and the radiation area extension, wherein the dielectric is fixed to the substrate together with the radiator inserted into the groove.

A convex portion is provided on a part of the plane of the antenna body, and the dielectric is provided with a jaw to which the convex portion is caught, so that the convex portion is caught by the jaw so that the antenna body and the radiation area extension portion are fixed to the dielectric. Built-in composite antenna.
The method according to claim 1,

The antenna body and the radiation area expansion unit is a built-in composite antenna having a vertical radiator, characterized in that to have a band characteristic by bending the conductive metal developed by the press working method.
The method according to claim 1,

And the antenna body and the radiation area extension part are formed by injecting molten conductive metal into the casting through MIM or DIE-CASTING.
The method according to claim 1,

And the band characteristic is determined by using a coupling or a length generated between adjacent radiating surfaces.
The method according to claim 1,

And a band characteristic of the antenna by adjusting a capacitance component according to a contact area between the antenna body and the radiation area expansion unit and the dielectric.
The method according to claim 1,

The antenna body is provided with a hook portion having a flat end in the shape of a hook, and the dielectric is provided with a jaw corresponding to the hook portion at a portion thereof, such that the radiator is fixed to the dielectric by fastening the hook portion and the jaw. Built-in composite antenna.
In the built-in antenna built in the terminal,

A plurality of radiators connected to individual feeders and disposed adjacent to each other, vertically perpendicular to the circuit board of the terminal, and bent a plurality of times according to a band characteristic; And

An antenna plate comprising a coupling part coupled to each of the radiators and a connecting part connecting the coupling part to each other, and a supporting part supporting the coupling part and the connecting part perpendicular to the board of the terminal;

Built-in composite antenna comprising a.
The method according to claim 7,

And the arrangement and bending characteristics of the antenna plate and the radiator are determined according to a band characteristic of each radiation region defined by a coupling portion of the antenna plate and a radiator coupled to the coupling portion.
The method according to claim 8,

And the arrangement between the coupling portion of the antenna plate and the radiator is different for each radiation region defined by the coupling portion of the antenna plate and the radiator coupled to the coupling portion.
The method according to claim 8,

And a coupling portion between the coupling portion of the antenna plate and the radiator is identical in each of the radiation regions defined by the coupling portion of the antenna plate and the radiator coupled to the coupling portion.
The method according to claim 8,

The band characteristics of each radiation region defined by the coupling portion of the antenna plate and the radiator coupled to the coupling portion may include the separation distance between the antenna plate and the radiator, the size of the coupling portion of the antenna plate, and the length of the adjacent portion of the radiator and the antenna plate. Built-in composite antenna, characterized in that the variable between the distance between the radiator, the bending characteristics of the radiator.
In the built-in antenna built in the terminal,

A plurality of radiators connected to individual feeders and disposed adjacent to each other, vertically arranged on a board of the terminal, and having a predetermined bending characteristic according to a band characteristic;

An insulator disposed on the board and configured to cover the plurality of radiators; And

An antenna plate disposed on the insulator, the antenna plate including a coupling part coupled to each of the radiators and a connection part connecting the coupling part to each other;

Built-in composite antenna comprising a.
The method according to claim 12,

The insulator is a built-in composite antenna, characterized in that for determining the separation distance between the radiator and the antenna plate according to the band characteristics.
The method according to claim 12,

The band characteristics of each radiation region defined by the coupling portion of the antenna plate and the radiator coupled to the coupling portion may include the separation distance between the antenna plate and the radiator, the size of the coupling portion of the antenna plate, and the length of the adjacent portion of the radiator and the antenna plate. Built-in composite antenna, characterized in that the variable between the distance between the radiator, the bending characteristics of the radiator.
In the built-in antenna built in the terminal,

A plurality of radiators connected to individual feeders and disposed adjacent to each other, vertically arranged on a board of the terminal, and having a predetermined bending characteristic according to a band characteristic; And

An antenna plate disposed on the board and having a coupling portion coupled to the radiator and a connecting portion connecting the coupling portions to each other;

Built-in composite antenna comprising a.
The method according to claim 15,

The band characteristics of each radiation region defined by the coupling portion of the antenna plate and the radiator coupled to the coupling portion may include the separation distance between the antenna plate and the radiator, the size of the coupling portion of the antenna plate, and the length of the adjacent portion of the radiator and the antenna plate. Built-in composite antenna, characterized in that the variable between the distance between the radiator, the bending characteristics of the radiator.