KR20030097476A - Antenna with multilayer - Google Patents

Abstract

PURPOSE: An antenna is provided to maintain characteristics of mono-pole antenna by periodically arranging top plates, while covering a plurality of bands. CONSTITUTION: An antenna comprises a short pin(130) for electrically connecting patches(100); patches formed of metal plates having holes formed to correspond to the short pin; a first dielectric interposed between the patches; a feed unit(140) for supplying a power to the patches; a ground plate having a hole formed to correspond to the feed unit, and which is arranged beneath the patches; and a second dielectric having a hole formed to correspond to the feed unit, and which is interposed between the ground plate and the patch arranged in the vicinity of the ground plate. The band of the frequency transmitted/received from/at the antenna is controlled in consideration with the size and length of the patch.

Description

Antenna with multilayer structure {Antenna with multilayer}

The present invention relates to an antenna capable of miniaturization and covering a plurality of bands while maintaining the performance of a conventional monopole antenna, and more particularly, using a plurality of antennas having periodic and symmetrical stacked structures. The present invention relates to an antenna capable of operating stably while covering a band.

FIG. 1 discloses an antenna structure (domestic application number [10-1999-0027539]) using a multilayer substrate, which is a modification of an existing helical antenna.

Referring to FIG. 1, metal plates are bonded to each other by epoxy resin between a top plate 11 positioned on a top layer and a base plate 14 directly connected to a connector 20. (12) is formed.

Then, the intermediate copper plate 13 is formed in the middle of the surface of each metal plate by etching, wherein the metal plates are in contact with each other to form a coil shape.

When the coil is actually wound and formed, the spacing is not constant, whereas when the coil is formed by etching in the middle of the metal plate, the coil is formed at a constant interval. Thus, a dielectric antenna having a resonance point exactly in the center band of the transmission / reception frequency is configured.

However, the prior art has a manufacturing problem because the coil must be formed through etching.

In addition, this prior art is required by adjusting the elements such as the horizontal and vertical size of the metal plate, the outer diameter and wire diameter and spacing of the coil formed through the etching of the middle of the metal plate, the size of the adhesive portion 15 between the metal plate of the intermediate copper plate 13, etc. The transmit / receive frequency band can be determined.

However, the prior art has a limitation in use that can only transmit and receive a single band frequency band thus determined.

In recent years, as the demand for miniaturization and more colorful designs of portable information and communication devices has increased, the demand for built-in antennas has increased rapidly. However, compared to the external antenna, there is a problem in that the wireless sensitivity is inferior, the antenna characteristic decreases due to the miniaturization, the antenna characteristic changes due to the user's hand, and the directivity.

Accordingly, an object of the present invention is to provide a small internal antenna that can solve the spatial problem caused by an antenna mounted in a mobile communication terminal.

In addition, an object of the present invention is to provide an antenna that can arrange the copper plate periodically to overcome the disadvantages of the flat antenna and to maintain the characteristics of the monopole antenna.

It is also an object of the present invention to provide an antenna that can cover a plurality of bands by adjusting the size and length of the copper plate and symmetrically arranging the copper plate.

Also. An object of the present invention is to provide an antenna that can adjust the bandwidth by adjusting the thickness of the dielectric having the greatest influence on the bandwidth among the dielectric interposed between the copper plate.

In addition, an object of the present invention is to provide an antenna that can be mounted anywhere in the terminal by reducing the size of the antenna.

It is also an object of the present invention to provide a method of attaching an antenna to a terminal by providing various forms of a power feeding unit.

It is also an object of the present invention to provide a terminal capable of being portable, convenient and designed by providing a small antenna that can be mounted inside the portable terminal.

1 is a view showing an antenna having a conventional multilayer structure.

Figure 2 is an exploded perspective view showing an antenna having a laminated structure according to an embodiment of the present invention.

3 is a cross-sectional view of an antenna having a stacked structure according to an embodiment of the present invention.

Figure 4 is a view showing the position of the short circuit pin according to an embodiment of the present invention.

FIG. 5A illustrates an antenna having a stacked structure capable of covering a dual band according to an exemplary embodiment of the present invention. FIG.

5B is a diagram illustrating an antenna having a stacked structure capable of covering a dual band according to an exemplary embodiment of the present invention.

6A and 6B illustrate an embodiment of a power feeding unit according to a power feeding mode.

<Description of the symbols for the main parts of the drawings>

100: patch

110: dielectric

120: ground plane

130: short circuit pin

140: feeder

170: front panel

In order to achieve the above objects, according to the present invention, an antenna having a laminated structure includes: a short pin, 2n patches made of a metal plate on which holes corresponding to the short circuit pins are formed, and 2n-1 pieces interposed between the plurality of patches. A hole corresponding to the feeding part is formed at a first dielectric, a feeding part, and one side, a ground plate disposed at a lower part of the antenna, and a hole corresponding to the feeding part is formed at one side, and the grounding plate and the By including a second dielectric interposed between patches adjacent to the ground plate, a multilayer structure antenna in which a frequency band transmitted and received by the antenna is adjusted according to the size and length of the patch may be provided.

Here, the 2n patches are composed of n first patches having a first size and length corresponding to the first frequency band and n second patches having a second size and length corresponding to the second frequency band, The dual band band can be transmitted and received. In addition, the first patch and the second patch is preferably stacked in a symmetrical structure with respect to the center axis of the antenna.

The 2n patches are made up of a group of even patches having the same size and length, and can transmit and receive a plurality of frequencies corresponding to the groups. In addition, the even patches may be stacked in a symmetrical structure with respect to the center axis of the antenna.

In addition, the gain and impedance of the antenna are adjusted to correspond to the thickness of the second dielectric, and the shorting pin may be a cylindrical rod.

The radiation pattern of the center frequency of the antenna may be adjusted according to the position of the shorting pin inserted into the hole formed in the metal plate, and the feed part may have a surface mount shape corresponding to the land of the connector and board corresponding to the coaxial cable. It may consist of one of the lands.

Hereinafter, an antenna having a stacked structure according to the present invention will be described with reference to the accompanying drawings. In addition, in the following description, the same components will be described with the same reference numerals regardless of the reference numerals.

2 is an exploded perspective view showing an antenna having a stacked structure according to an embodiment of the present invention.

An antenna having a stacked structure according to the present invention includes a patch 100, a dielectric 110, a ground plane 120, a shorting pin 130, and a feeder 140, and is not shown in FIG. 1. The plate may further include.

The patch 100 may include a plurality of patches 100-1, 100-2, 100-3, and 100-4, and according to the present invention, a plurality of patches 100-1, 100-2, 100-3, 100-4) is preferably composed of an even number (2n), in a preferred embodiment may be composed of four patches.

Compared with the external antenna, the wireless sensitivity, which is a disadvantage of the internal antenna, is reduced, and the antenna characteristic deterioration due to the miniaturization can be solved through the stacked structure according to the present invention.

The dielectric 100 is interposed between the patches, and according to the present invention, the interposed dielectric 110 also includes a plurality of dielectrics 110-1, 110-2, 110-3, and 110-4. . The gain and impedance of the antenna may be adjusted according to the dielectric constant and thickness of the dielectric 110.

The plurality of patches are electrically connected through the short circuit pin 130. Therefore, the plurality of patches 100-1, 100-2, 100-3, and 100-4 are holes 130-1, 130-3, 130-5, and 130-into which the shorting pins 130 can be inserted. 7) can be formed.

In addition, the patch 110-4 stacked closest to the ground plane may include the power supply unit 140 as well as the holes 130-1, 130-3, 130-5, and 130-7 through which the shorting pin 130 is inserted. ) And a hole 190-1 through which the power feeding unit 140 may be inserted to be electrically connected to the power supply unit 140.

Dielectric 100 is composed of a plurality of dielectric (110-1, 110-2, 110-3, 110-4), each dielectric 110 is interposed between the patch (100). According to the present invention, the plurality of dielectrics (110-1, 110-2, 110-3, 110-4) is preferably composed of an even number corresponding to the plurality of patches, in one preferred embodiment the The dielectric may consist of four.

Shorting pin holes 130-2, 130-4, and 130-6, through which the shorting pins 130 can be inserted, are also formed in the plurality of dielectrics 110-1, 110-2, and 110-3. A hole 190-2 through which the feeder 140 may be inserted may be formed in the dielectric 110-4 interposed between the 120 and the patch 100-4.

Feeding unit 140 is a portion for supplying power to the patch, it is shown as a connector with reference to FIG. However, the power feeding unit 140 may be configured as a surface mounted device (SMD) in which lands are formed to be directly mounted on a substrate. That is, the power supply unit 140 may be implemented as a connector depending on the shape of mounting on the board, or may be implemented in a surface mount form that can be directly mounted on the board. (See FIGS. 6A and 6B).

The shorting pin 130 uses a function of electrically connecting the plurality of patches 100-1, 100-2, 100-3, and 100-4, and the shorting pin 130 has the hole 130-1. 130-2, 130-3, 130-4, 130-5, 130-6, and 130-7 formed patches 100-1, 100-2, 100-3, 100-4 and dielectric 110-1 , 110-2 and 110-3.

Referring to FIG. 2, the shorting pin 130 is illustrated in a cylindrical shape, but the shorting pin 130 is not limited to the shape and may be implemented in various forms.

Antenna having a laminated structure according to the present invention is the size of the patch (100-1, 100-2, 100-3, 100-4), the position of the shorting pin 130, the dielectric (110-1, 110-2, 110) Frequency band and antenna characteristics may be determined according to the type, thickness, etc. of -3 and 110-4.

Hereinafter, the characteristics of the antenna according to the dielectric constant will be described in FIG. 3, and the characteristics of the antenna according to the position of the shorting pin 130 will be described in FIG. 4.

3 is a view showing a cut surface of the antenna having a laminated structure according to an embodiment of the present invention.

In the antenna according to the present invention, a frequency band for transmitting and receiving corresponding to a plurality of patches (100-1, 100-2, 100-3, 100-4) is determined, and the plurality of patches (100-1, 100-2) Antenna characteristics may be determined according to the plurality of dielectrics 110-1, 110-2, 110-3, and 110-4 interposed between, 100-3, and 100-4.

The performance of communications and radar systems depends on the gain of the antenna used, and the gain of the antenna used is very important because the cost of fabrication and maintenance of such a system varies greatly depending on the magnitude of the output power. Antenna gain is defined as 4π times the ratio of radiated power per unit stereoscopic angle in a given direction to the net power delivered to the antenna.

According to the present invention, between the patch and the ground plane of the plurality of dielectrics interposed between the patch 100-4 and the ground plate of the plurality of dielectrics (110-1, 110-2, 110-3, 110-4) The thickness of the dielectric 110-4 interposed therebetween has the greatest influence on the gain and impedance of the antenna according to the present invention.

If the frequency band for transmitting and receiving is constant, a dielectric having a large dielectric constant may be used to reduce the size of the antenna.

In the present invention, by using a dielectric having a different dielectric constant or thickness for each of the plurality of dielectrics 110-1, 110-2, 110-3, and 110-4, an antenna having various characteristics can be provided according to a purpose of use. have.

Hereinafter, it will be assumed that a dielectric having the same permittivity is used for convenience of description of the invention.

Figure 4 is a view showing the position of the short circuit pin according to an embodiment of the present invention.

The antenna radiation pattern, which is related to the antenna gain, is an antenna characteristic for radiating or receiving electromagnetic waves only in a desired direction. In the case of remote sensing or radar, a directional radiation pattern is required to increase spatial resolution.

According to the present invention, the radiation pattern of the antenna is determined corresponding to the position of the shorting pin 130. That is, the shorting pin 130 may change the radiation pattern of the center frequency of the antenna by changing the positions 130-1, 130-2, 130-3, and 130-4 of the shorting pins.

According to one embodiment of the invention, when the short circuit pin 130 is formed on the opposite side, that is, the other side (130-4) on which the feed portion 140 is formed, it has the widest radiation pattern.

In addition, according to an embodiment of the present invention, the short circuit pin 130 may have a diameter of about 0.5 mm.

5A is a diagram illustrating an antenna having a stacked structure capable of covering a dual band according to an exemplary embodiment of the present invention.

Since the resonant frequency is changed to correspond to the length of the patch 100 according to the present invention, the length of the patch 100 may be adjusted to manufacture a wideband antenna corresponding to various frequency bands.

According to the present invention, it is preferable that even patches having different sizes corresponding to frequencies to be transmitted and received are configured in groups, and the paired groups are symmetrically stacked.

In FIG. 5A, for convenience of explanation, the multilayer antenna including four patches will be described.

Referring to FIG. 5A, a stacked structure according to the present invention includes a first group 200 corresponding to a first band and a second group 210 corresponding to a second band.

The first group 200 is composed of two patches 200-1 and 200-2 having a first length h1, and the two patches 200-1 and 200-2 are formed on a central axis 250. Are stacked symmetrically based on

In addition, the second group 210 is composed of two patches 210-1 and 210-2 having a second length h2, and the two patches 210-1 and 210-2 are also central axes. It is laminated symmetrically with reference to 250.

As described above, the antenna having the stacked structure may operate as a dual band antenna capable of covering the first frequency band and the second frequency band.

The multilayer antenna having the above-described structure can be usefully used for terminals operating two systems in one terminal.

For example, a terminal including a first group set to correspond to a mobile communication frequency and a second group set to correspond to a band for GPS can be implemented as a single antenna as well as a general mobile phone and a GPS function. There is an advantage that can be.

After the dual band function, the antenna can be widely used, such as a GPS / PCS combined terminal, a GPS, CELLULAR combined terminal, and a GPS / IMT-2000 combined terminal.

That is, according to the present invention, a dual band antenna that can be manufactured in a small and excellent antenna characteristics can be provided.

In FIG. 5B, a stacked structure that can cover three band frequencies using six patches will be described.

5B is a diagram illustrating an antenna having a stacked structure that can cover three bands according to an exemplary embodiment of the present invention.

When the number of patches is 4, as in the case of covering the dual band frequency, when the number of patches is 6, the frequency over three bands can be covered.

The first group 300 is composed of two patches 300-1 and 300-3 having a first length h1, and the two patches 300-1 and 300-2 are formed on a central axis 350. Are stacked symmetrically based on

In addition, the second group 310 is composed of two patches 310-1 and 310-3 having a second length h3, and the two patches 310-1 and 310-2 also have a central axis. Reference numeral 350 is symmetrically stacked.

In addition, the third group 320 is composed of two patches 320-1 and 320-3 having a second length h3, and the two patches 320-1 and 320-2 are also central axes. Reference numeral 350 is symmetrically stacked.

Other description is the same as in Fig. 5a will be omitted.

According to the present invention, since the frequency changes in accordance with the length of each patch, it is possible to cover various bandwidths by adjusting the length of the patch in accordance with the frequency bandwidth.

In FIG. 5B, the group is composed of two groups. However, one group may be configured symmetrically with respect to the central axis by configuring four patches, eight patches, or more patches. By stacking the patches in a symmetrical manner, a multilayer antenna having excellent antenna characteristics can be provided.

6A and 6B illustrate an embodiment of a power feeding unit according to a power feeding mode.

FIG. 6A is a view illustrating an embodiment of feeding power using a coaxial line, and FIG. 6B illustrates an embodiment of a feeding part having a structure that may be attached to a PCB board in a surface mount form.

According to an embodiment of the present invention, the size of the patch may be horizontal 23mm, vertical 3mm, thickness 0.6mm. In addition, when the size of the feeder 140 and both edges are included, the total width may be 25 mm and 4 mm.

As described above, the multilayer antenna having a symmetrical structure according to the present invention has the effect of providing a built-in small antenna capable of solving the spatial problem caused by the antenna mounted in the mobile communication terminal.

In addition, the present invention has the effect of providing an antenna that can arrange the copper plate periodically, overcoming the disadvantages of the flat antenna and maintain the characteristics of the monopole antenna.

In addition, the present invention has the effect of providing an antenna that can cover a plurality of bands by adjusting the size and length of the copper plate, and symmetrically arranged the copper plate.

Also. The present invention also has the effect of providing an antenna that can adjust the bandwidth by adjusting the thickness of the dielectric having the greatest influence on the bandwidth among the dielectric interposed between the copper plate.

In addition, the present invention has the effect of providing an antenna that can be mounted anywhere in the terminal by reducing the size of the antenna.

In addition, the present invention also provides a variety of forms of the power supply, there is an effect of providing a method for attaching the antenna to the terminal.

In addition, the present invention also provides a small antenna that can be mounted inside the portable terminal, there is an effect that can provide a terminal capable of portability, convenience and design design.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

Claims (9)

In the antenna of the laminated structure, A shorting pin for electrically connecting the patch; 2n patches made of a metal plate having holes corresponding to the shorting pins; 2n-1 first dielectrics interposed between the plurality of patches; A power supply unit supplying power to the patch; A ground plate corresponding to the feeding part formed at one side thereof and disposed at a lower portion of the patch; And A second dielectric having a hole corresponding to the feeding part formed at one side and interposed between the ground plate and a patch adjacent to the ground plate; Including, Stacked antenna characterized in that the frequency band transmitted and received by the antenna is adjusted in accordance with the size and length of the patch. The method of claim 1, The 2n patches N first patches having a first size and length corresponding to the first frequency band; And N second patches having a second size and length corresponding to the second frequency band By consisting of, Multi-layer antenna, characterized in that for transmitting and receiving a dual band band. The method of claim 2, And the first patch and the second patch are stacked in a symmetrical structure with respect to the center axis of the antenna. The method of claim 1, The 2n patches, Consists of groups of even patches of equal size and length, Stacked antenna, characterized in that for transmitting and receiving a plurality of frequencies corresponding to the group. The method of claim 2, The even numbered patches are stacked structured antennas, characterized in that stacked on the center axis of the antenna symmetrical structure. The method of claim 1, And the gain and impedance of the antenna are adjusted to correspond to the thickness of the second dielectric. The method of claim 1, The short-circuit pin is a laminated structure antenna, characterized in that the cylindrical rod. The method of claim 1, And a radiation pattern of a center frequency of the antenna according to a position of a shorting pin inserted into a hole formed in the metal plate. The method of claim 1, The feed section A laminated structure antenna comprising one of a connector corresponding to a coaxial cable and a land of a surface mount type corresponding to a land of a board.