KR100956746B1 - Twin Intenna Multi-layered dielectric-body decreasing human-effect - Google Patents

Abstract

According to the present invention, a multilayer dielectric symmetric antenna having a reduced human effect is provided with a symmetric multi-band radiating element in which a plurality of radiating elements are integrally formed on a laminated dielectric surface in which a dielectric having a high dielectric constant is laminated between two low dielectric constant dielectrics. The symmetrical structure of the multi-band radiating element not only operates in a wide band but also when the radiating element on one side of the symmetrical multi-band radiating element cannot play a role, the remaining radiating elements by the symmetry complement each other. .

In addition, since the high frequency radiating element operating in the relatively high frequency band of the multi-band radiating element is formed on the low dielectric constant dielectric surface of the multilayer dielectric, the radiation loss of the antenna is minimized, and the low frequency radiating element operating in the relatively low frequency band The antenna is miniaturized by being formed on the dielectric surface of the high dielectric constant of the stacked dielectric material, and the antenna built into the mobile terminal during the call by using a dielectric constant similar to the human body may cause the antenna to be changed due to the change in dielectric constant due to human effects. It is possible to provide reliable call quality by reducing the sudden change in the radiation characteristics of the.

Intena, currency transfer, data rate, dielectric constant, laminated ceramic, human influence, high dielectric constant

Description

Twin Intenna Multi-layered dielectric-body decreasing human-effect

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer dielectric symmetric antenna with reduced human impact, wherein a symmetrical multi-band radiating element formed on a laminated dielectric surface formed by stacking two low dielectric constant and a dielectric having a high dielectric constant similar to that of a human body is the symmetrical antenna. By complementary operation by the broadband operation at the same time.

In addition, a high frequency radiating element operating in a relatively high frequency band of the multi-band radiating element and a low frequency radiating element operating in a relatively low frequency band are formed on surfaces of dielectrics having different permittivity of the laminated dielectric material, respectively, so that they are optimal in each band. In addition to operating with efficiency, the size of the antenna is also miniaturized, and at the same time, the dielectric constant of the high dielectric constant has a dielectric constant similar to that of the human body, thereby minimizing the change in dielectric constant due to the influence of the human body during communication, thereby improving the communication quality of the mobile terminal. An impact reduction laminated dielectric symmetric antenna.

Currently, mobile terminals are required to have various service functions while being miniaturized and lightweight, and in order to satisfy such demands, internal circuits and components used in the mobile terminals are being miniaturized, and the same is true in the antenna, which is one of the main components of the mobile terminal. In order to solve this problem, an antenna using a ceramic dielectric has been developed.

1A is a front perspective view of a ceramic symmetric antenna 10 formed in a conventional low dielectric constant, and FIG. 1B is a rear perspective view according to FIG. 1A.

1A and 1B, the surface of the low dielectric constant 11 has a plurality of high frequency radiating elements 13 and 14 operating in a relatively high frequency band and a plurality of low frequency radiations operating in a relatively low frequency band. The elements 15 and 16 are integrally formed to form symmetrical radiating elements operating in multiple bands.

The symmetrical radiating element formed on the surface of the low dielectric constant 11 is spaced at a predetermined interval around the connecting strip conductor 12 formed on the upper surface of the low dielectric constant 11 to radiate the first radiating element and the second radiating element. The element and the third radiating element 13-15 are branched to both sides to form symmetry and parallel to each other.

In addition, a predetermined portion of both ends of the third radiating element 15 is bent along an end portion adjacent to one side of the low dielectric constant 11 and extends to one side of the low dielectric constant dielectric to have a symmetrical spiral structure. The fourth radiating element 16 is formed.

In addition, a predetermined portion of the fourth radiating element 16 branches and extends to a lower end portion of one side of the low dielectric constant dielectric 11 to form a fixed terminal 17.

In addition, a feed strip conductor 18 is formed on the other side of the low dielectric constant 11 to be integrally formed with a predetermined portion of the first radiating element 12.

In addition, a feed terminal 19 integrally formed at an end of the feed strip conductor 18 is formed to feed the first to fourth radiating elements 12-16.

As such, although the first and second radiating elements 13-14 operating in the high frequency band are formed in the low dielectric constant 11 to minimize radiation loss, the radiation efficiency may be maximized. The third and fourth radiating elements 15-16 have a problem that the size increases.

In addition, during the call, the ceramic symmetrical antenna 10 embedded in the mobile terminal has a dielectric constant changed by the influence of the human body, and the radiation characteristic of the ceramic symmetrical antenna 10 is changed by the change of the dielectric constant so that the call transfer ( drop call) phenomenon and a problem of data transmission / reception speed decrease.

Accordingly, the present invention has been made to solve the above problems, the present invention is a high-frequency radiating element operating in a relatively high frequency band constituting a symmetric multi-band radiating element is formed on the low dielectric constant dielectric surface of the multilayer dielectric In addition, the low-frequency radiating elements operating in the relatively low frequency band are formed on the dielectric surface of the high dielectric constant of the multilayer dielectric, thereby improving the radiation efficiency of the antenna and miniaturizing the size, and correspondingly due to the symmetrical structure of the multi-band radiating element. Broadband at the frequency is of course complementary.

In addition, the dielectric of the high dielectric constant has a dielectric constant of 40 ~ 50 similar to the human body to minimize the change in the dielectric constant due to the influence of the human body during communication to improve the transmission and reception performance of the mobile terminal.

In order to achieve the above object, a multilayer dielectric symmetric antenna according to an embodiment of the present invention includes a multilayer dielectric formed by stacking at least two dielectrics having different dielectric constants and a symmetrical conductivity on a surface of the multilayer dielectric. Characterized in that it comprises a multi-band radiating element formed by a pattern.

As described above, in the present invention, a laminate dielectric is formed by combining two low dielectric constant dielectrics and a dielectric constant having a high dielectric constant similar to that of a human body, and are symmetrical with any one of the two low dielectric constant dielectrics of the multilayer dielectric. The radiation loss is minimized by forming a high frequency radiating element corresponding to a relatively high frequency band, and the radiation efficiency of the antenna is improved, and at the same time, a low frequency radiating element corresponding to a relatively low frequency band is symmetrically formed in the dielectric having the high dielectric constant. Not only the size of the antenna is miniaturized, but the symmetrical multi-band radiating element in which the high frequency radiating element and the low frequency radiating element are integrally formed has a complementary characteristic and a wide band characteristic by the symmetrical structure as well as 40 ~ Using dielectric of 50 high dielectric constant As a result, the performance of the antenna is improved by minimizing the problem caused by the human body.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2A is a front perspective view of a human body impact reducing multilayer dielectric symmetric antenna 100 according to the present invention.

As shown, a high dielectric constant 112 is coupled between two low dielectric constants 111 and 113 having different dielectric constants? R to form one stacked dielectric body 110, and the stacked type A symmetrical structure in which the first radiating element 122, the second radiating element 123, and the third radiating element 124 and the fourth radiating element 124 formed on one side are integrally formed. , And shows the human impact reduction multilayer dielectric symmetric antenna 100 operating in a multi-band.

The multilayer dielectric 110 is formed by stacking at least two dielectrics having different dielectric constants from each other.

In this case, the multilayer dielectric is formed by vertically stacking a dielectric having a high dielectric constant under a low dielectric constant having a different dielectric constant, and particularly, the dielectric having a high dielectric constant is located at a lowermost lower layer of the multilayer dielectric.

The low dielectric constant is formed of either a ceramic having a low dielectric constant or a general composite resin.

In addition, the dielectric of the high dielectric constant is formed of a ceramic having a high dielectric constant, in particular by using a dielectric constant of 40 to 50 to reduce the influence of the call quality by the human body during the call.

In addition, the lower portion of the high-k dielectric further includes a ceramic or liquid crystal polymer (LCP) -based dielectric having a low dielectric constant to enable surface mounting on the main circuit board of the mobile terminal.

For example, the multilayer dielectric 110 may be formed by vertically stacking the high dielectric constant 112 between the two low dielectric constants 111 and 113 having different dielectric constants, and the two low dielectric constants. Each of the dielectrics 111 and 113 becomes a first low dielectric constant 111 and a second low dielectric constant 113.

That is, in the multilayer dielectric 110, the first low dielectric constant 111 in the first layer, the high dielectric constant 112 in the second layer, and the second low dielectric constant 113 in the third layer are perpendicular to each other. It is laminated and formed.

In addition, the first low dielectric constant 111 is preferably formed of a ceramic having a dielectric constant of approximately 3.5 to 5, the second low dielectric constant 113 is to be mounted on the main circuit board inside the mobile terminal. It is desirable to use LCP series dielectrics to enable surface mount.

In addition, the high dielectric constant 112 is preferably having a dielectric constant of 40 ~ 50 similar to the human body.

As shown in FIG. 2A, the symmetrical multi-band radiating element 120 formed on the surface of the multilayer dielectric 110 is a high frequency radiating element operating in a relatively high frequency band. 123 and the third and fourth radiating elements 124 to 125 which are low frequency radiating elements operating in a relatively low frequency band are integrally formed.

In more detail, the first radiating element 122, the second radiating element 123, and the third radiating element 124 are formed to be parallel to each other by being spaced apart from each other by a predetermined distance, and an upper surface of the multilayer dielectric 110. Is formed.

The first radiating element 122 has one end of the connection strip conductor 121 formed at the center of the upper surface of the first low dielectric constant 111 and branched to both sides so that the first surface of the first low dielectric constant 111 is one end. It is formed symmetrically along the wealth.

The second radiating element 123 is formed to be symmetrically branched to both sides from one end of the connecting strip conductor 121 where the first radiating element 122 is branched from a predetermined distance, and is formed symmetrically. It is formed in parallel with the element 122.

In addition, the length of the second radiating element 123 is formed shorter than the first radiating element 122.

The third radiating element 124 is formed so that the other end of the connecting strip conductor 121 is symmetrically branched to both sides along the other end of the upper surface of the first low dielectric constant 111. It is formed parallel to 123).

As described above, the first to third radiating elements 122 to 124 which are spaced apart from the connecting strip conductor 121 at predetermined intervals and are symmetrical to both sides are parallel to each other and are integrally formed.

In addition, the first and second radiating elements 122 and 123 operating in the high frequency band are formed in the first low dielectric constant 111, thereby reducing radiation of the human body influence laminated dielectric symmetric antenna 100 according to the present invention. There is an effect of improving the radiation efficiency by minimizing the loss.

The fourth radiating element 125 is formed on one side of the multilayer dielectric 110, and more particularly, is formed on one side of the high dielectric constant 112 of the multilayer dielectric 110.

The fourth radiating element 125 has a predetermined portion of both ends of the third radiating element 123 bent along an end portion adjacent to one side of the multilayer dielectric 110 and the first low dielectric constant 111. It extends to one side of the helical structure symmetrically to one side of the high dielectric constant dielectric (112).

In addition, a predetermined portion of the fourth radiating element 125 is branched and extended to one side of the second low dielectric constant 113 and bent at a lower end of the second low dielectric constant 113 to be mounted on the mobile terminal. Two fixed terminals 126 are formed.

In addition, the fourth radiating element 125 operating in the low frequency band is formed in the dielectric constant 112 of the high dielectric constant having a high dielectric constant similar to the human body, thereby reducing the human body impact laminated dielectric symmetric antenna 100 according to the present invention. As well as miniaturization, the antenna 100 according to the present invention embedded in the mobile terminal during the call reduces the change in permittivity due to human influence such as a human hand and a head, thereby rapidly decreasing the radiation characteristic of the antenna 100. There is another effect of providing reliable call quality to the mobile terminal by minimizing the change.

As such, the first to fourth radiating elements 122 to 125 are integrally formed to be symmetrical, and thus serve to compensate for each other as well as operating in a wide band at a corresponding frequency band.

In addition, the first to fourth radiating elements 122 to 125 are formed by any one of a flexible printed wiring board (FPWB), metal stamping, and silver paste.

2B is a rear perspective view of the present invention according to FIG. 2A, FIG. 2C is a detailed bottom view of FIG. 2A, and FIG. 2D is a detailed view of the radiating element 120 according to FIG. 2A.

As shown in FIG. 2B, the feed strip conductor 127 is formed at the center along the other side of the multilayer dielectric 110 to form the first radiation element 122 formed on the upper surface of the multilayer dielectric 110. Is connected to a predetermined portion of the integrally formed.

In addition, a feed terminal 128 is formed at an end of the feed strip conductor 127, and the feed terminal 128 is a lower end portion of the multilayer dielectric 110, more specifically, the second low dielectric constant 113. Bending at the lower end of the) feeds the radiating element 120.

3A is a reflection loss characteristic diagram in a free space (state without human influence) of the present invention according to FIG. 2A. As shown in the drawing, the third and fourth radiating elements 124 and 125 operate in a relatively low frequency Cellular (800 to 900 MHz), and by the first and second radiating elements 122 and 123. It operates in relatively high frequency GPS (1.575GHz), DCS / PCS (1.7-2GHz), IMT2000 (1.8-2.2GHz) and Bluetooth (2.4-2.5GHz).

FIG. 3B is a reflection loss characteristic diagram in the portable state of the present invention according to FIG. 2A, and shows the reflection loss in a state where an antenna part is held by a human hand.

FIG. 3C is a reflection loss characteristic diagram in a call state of the present invention according to FIG. 2A, and shows a return loss in a call state while holding an antenna part with a hand.

Figure 3d shows a comparison of the return loss in the free space between the present invention and the prior art according to FIG. 2a.

As shown in FIG. 3A to FIG. 3D, the results of comparing the actual transmission / reception performance of the human terminal with reduced dielectric dielectric symmetric antenna 100 according to the present invention and a mobile terminal having a conventional antenna are shown in Table 1.

As shown in Table 1, the measured data item includes the received signal strength indicator (RSSI), the transmission and reception levels of a person directly in a non-reflective chamber of a far field and data in a free space. It is recorded.

Cellular US PCS  Free space Mobile Free space Mobile Conventional technology Invention Conventional technology Invention Conventional technology Invention Conventional technology Invention Receive Level (dBm) -65 -61 -83 -66 -70 -70 -88 -82 Send level (dBm) -14 -16 +3 -10 -11 -18 -One -2 Receive Intensity (dBm) 70 67 89 72 74 74 92 88

As shown in Table 1, the difference between the transmission and reception levels measured in the cellular state and the prior art and the present invention in the cellular state and the transmission and reception level measured in the free space, respectively, is about 17 to 18 dBm. Is only about 5-6dBm drop.

As described above, the smaller the difference between the reception level measured in the state of carrying the mobile terminal and the reception level measured in the free space means that the antenna built into the mobile terminal is less affected by the human body. It shows that the wireless performance of the mobile terminal with the built-in antenna is excellent.

The present invention has been described in detail so far, but the embodiments mentioned in the process are only illustrative and are not intended to be limiting, and the present invention is provided by the following claims and the technical spirit and field of the present invention. Within the scope of not departing from, the change of components to the extent that can be coped evenly will be within the scope of the present invention.

1A is a front perspective view of a ceramic symmetrical antenna in the prior art

FIG. 1B is a rear perspective view of the ceramic symmetric antenna according to FIG. 1A

Figure 2a is a front perspective view of a human dielectric reduction laminated dielectric symmetric antenna according to the present invention

Figure 2b is a perspective view of the rear of the human body impact reduction laminated dielectric symmetric antenna according to Figure 2a

2c is a bottom view detail according to FIG. 2a

Figure 2d is a detailed view of the radiating element according to Figure 2a

3A is a reflection loss characteristic diagram in free space according to FIG. 2A;

3B is a reflection loss characteristic diagram in the portable state according to FIG. 2A;

3C is a reflection loss characteristic diagram in a call state according to FIG. 2A;

Figure 3d is a comparison of the return loss between the present invention and the prior art according to Figure 2a

* Description of the main parts of the drawings *

10: ceramic symmetrical antenna

11 low dielectric constant 12 connecting strip conductor

13: first radiating element 14: second radiating element

15: third radiating element 16: fourth radiating element

17: fixed terminal 18: feed strip conductor

19: Feeding terminal

100: Reduced human influence multilayer dielectric symmetric antenna

110: laminated dielectric

111: first low dielectric constant dielectric

112: high dielectric constant

113: second low dielectric constant dielectric

120: radiating element

121: connecting strip conductor 122: first radiating element

123: second radiating element 124: third radiating element

125: fourth radiation element 126: fixed terminal

127: feed strip conductor 128: feed terminal

Claims (6)

A multilayer dielectric formed by stacking at least two dielectrics having different permittivity from each other; It comprises a multi-band radiating element formed by a symmetrical conductive pattern on the surface of the laminated dielectric material; The multi-band radiating element has a symmetrical structure in which a high frequency radiating element operating in a relatively high frequency band and a low frequency radiating element operating in a relatively low frequency band are integrally formed in a symmetrical structure. The low-frequency radiating element is formed on the surface of the dielectric, the low-frequency radiating element is a human dielectric reduction laminated dielectric symmetric antenna, characterized in that formed on the surface of the dielectric having a high dielectric constant. The method of claim 1, wherein the multilayer dielectric, Human dielectric reduction laminated dielectric symmetric antenna, characterized in that the dielectric constant of the dielectric having a high dielectric constant of the laminated dielectric material is 40 ~ 50. The method according to claim 2, wherein the high dielectric constant dielectric, Human dielectric reduction laminated dielectric symmetric antenna, characterized in that located in the lowermost layer. The method according to claim 2 or 3, A low dielectric constant ceramic or LCP series dielectric is further included under the high dielectric constant dielectric for surface mounting. delete The method according to claim 1, wherein the multi-band radiating element, A human dielectric reduction laminated dielectric symmetric antenna, characterized in that formed by any one of metal stamping, FPWB, pad printing and silver paste.

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