KR20150012932A - Antenna apparatus - Google Patents

Antenna apparatus Download PDF

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Publication number
KR20150012932A
KR20150012932A KR1020130089128A KR20130089128A KR20150012932A KR 20150012932 A KR20150012932 A KR 20150012932A KR 1020130089128 A KR1020130089128 A KR 1020130089128A KR 20130089128 A KR20130089128 A KR 20130089128A KR 20150012932 A KR20150012932 A KR 20150012932A
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KR
South Korea
Prior art keywords
antenna elements
antenna
shielding element
slits
antenna device
Prior art date
Application number
KR1020130089128A
Other languages
Korean (ko)
Inventor
오상배
Original Assignee
엘지이노텍 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020130089128A priority Critical patent/KR20150012932A/en
Publication of KR20150012932A publication Critical patent/KR20150012932A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2291—Supports; Mounting means by structural association with other equipment or articles used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Details Of Aerials (AREA)

Abstract

The present invention relates to an antenna device, which includes a plurality of antenna elements, a plurality of ring-shaped slits formed therein, and an interference shielding element for transmitting and receiving signals introduced from the antenna elements along slits. According to the present invention, in operation of the antenna device, electromagnetic mutual coupling between the antenna elements is suppressed.

Description

ANTENNA APPARATUS

The present invention relates to an antenna device, and more particularly to an antenna device having a plurality of antenna elements.

2. Description of the Related Art Generally, studies are being conducted to improve the performance of an antenna device in a communication terminal. This is because the antenna device in the communication terminal is responsible for substantially transmitting and receiving signals. Accordingly, recently, a multiple-input multiple-output (MIMO) antenna device has been proposed as an antenna device mounted on a communication terminal. At this time, the mimo antenna apparatus has a plurality of antenna elements. In such a fine antenna apparatus, signals are transmitted and received in a frequency band through the antenna elements, thereby being connectable to various communication networks.

However, there is a problem that electromagnetic coupling occurs between the antenna elements during operation of the mimo antenna apparatus as described above, resulting in deterioration of the performance of the communication terminal. This problem becomes more serious as the miniature antenna device is miniaturized. Therefore, there is a demand for a method for suppressing electromagnetic mutual coupling between antenna elements in a fine antenna apparatus.

Accordingly, the present invention provides an antenna device for suppressing electromagnetic mutual coupling between antenna elements. Furthermore, the present invention provides an antenna device for improving the performance of a communication terminal.

According to an aspect of the present invention, there is provided an antenna device including a plurality of antenna elements and a plurality of ring-shaped slits formed therein, the antenna elements transmitting signals received from the antenna elements along the slits, Device.

At this time, in the antenna device according to the present invention, any one of the slits is formed inside the other one of the slits.

In the antenna device according to the present invention, the interference shielding element may include a slit closing part for closing any one of the slits corresponding to one of the antenna elements.

In the antenna device according to the present invention, the interference shielding element is disposed between the antenna elements.

In operation of the antenna device according to the present invention, the electromagnetic mutual coupling between the antenna elements is suppressed. That is, the interference shielding element cancels the incoming signals from the antenna elements, thereby suppressing interference between the antenna elements. This improves the performance of the antenna device. Further, the performance of the communication terminal is improved. In addition, even if the antenna elements are disposed adjacent to each other in the antenna apparatus, the operation performance of the antenna apparatus can be ensured. Thus, it is possible to realize miniaturization of the antenna device. Furthermore, miniaturization of the communication terminal is possible.

1 is a perspective view showing an antenna device according to an embodiment of the present invention,
2 is a plan view showing an antenna device according to an embodiment of the present invention,
3 is an image for explaining the current distribution of the interference shielding element according to the operation of the antenna apparatus according to the embodiment of the present invention,
FIG. 4 is a graph illustrating the degree of interference between antenna elements in an antenna device according to an exemplary embodiment of the present invention,
5 is a graph illustrating graphs illustrating operating characteristics of antenna elements in an antenna device according to an exemplary embodiment of the present invention,
FIG. 6 is a view illustrating images for explaining a radiation pattern of an antenna device according to an embodiment of the present invention, and
7 is a perspective view illustrating an antenna device according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same components are denoted by the same reference symbols as possible in the accompanying drawings. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted.

FIG. 1 is a perspective view showing an antenna device according to an embodiment of the present invention, and FIG. 2 is a plan view showing an antenna device according to an embodiment of the present invention. And FIG. 3 is an image for explaining the current distribution of the interference shielding element according to the operation of the antenna apparatus according to the embodiment of the present invention. 4 is a graph for explaining the degree of interference between antenna elements in an antenna device according to an embodiment of the present invention. FIG. 5 is a graph for explaining the operation characteristics of antenna elements in an antenna device according to an embodiment of the present invention. And FIG. 6 are images for explaining a radiation pattern of the antenna device according to an embodiment of the present invention. 4, Fig. 5 and Fig. 6, (a) shows the case where the interference shielding element is not included, and (b) shows the case where the interference shielding element is included.

Referring to FIGS. 1 and 2, the antenna device 100 of the present embodiment includes a driving substrate 110, a grounding member 120, antenna elements 130 and 140, and an interference shielding element 150.

The driving substrate 110 is provided for feeding and supporting in the antenna device 100. The driving substrate 110 has a flat plate structure. In this case, the driving substrate 110 may be a printed circuit board (PCB). Here, the driving substrate 110 may be a single substrate or a plurality of substrates stacked.

A transmission line (not shown) is incorporated in the driving substrate 110. The transmission line is connected to a control module (not shown) via one end. The transmission line is exposed through the other end. That is, the transmission line receives the signal from the control module and transfers the signal from one end to the other end.

The driving substrate 110 also includes a dielectric. Here, the conductivity () of the driving substrate 110 may be 0.02. The permittivity (epsilon) of the driving substrate 110 may be 4.4 to 4.8. In addition, the loss tangent of the driving substrate 110 may be 0.02. At this time, the transmission line is made of a conductive material. Here, the transmission line may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni).

The grounding member 120 is provided for grounding at the antenna device 100. [ At this time, the grounding member 120 grounds the antenna elements 130 and 140 and the interference blocking element 150. Such a grounding member 120 is formed in a part or the whole area of the driving substrate 110. At this time, the grounding member 120 is separated from the transmission line of the driving substrate 110. That is, the grounding member 120 is not electrically connected to the transmission line. Here, the grounding member 120 may be disposed on at least one of the lower surface and the upper surface of the driving substrate 110. Or the driving substrate 110 is composed of a plurality of substrates, the grounding body 120 may be disposed between the substrates.

The antenna elements 130 and 140 are provided for communication in the antenna apparatus 100. At this time, the antenna elements 130 and 140 operate as signals are supplied from the driving substrate 110. That is, the antenna elements 130 and 140 emit signals according to their respective communication methods. For example, one of the antenna elements 130 and 140 may support a Bluetooth communication scheme and the other of the antenna elements 130 and 140 may support a Wi-Fi communication scheme . The antenna elements 130 and 140 resonate at a predetermined impedance. The antenna elements 130 and 140 also operate in a predetermined resonance frequency band. Here, the antenna elements 130 and 140 may operate in the same resonance frequency band. For example, the antenna elements 130 and 140 may operate in the approximately 2.4 GHz band.

The antenna elements 130 and 140 are disposed on the driving substrate 110. Here, the antenna elements 130 and 140 may be disposed on one surface of the driving substrate 110. At this time, the antenna elements 130 and 140 are disposed apart from each other. Here, the antenna elements 130 and 140 may be formed in symmetrical shapes, or may be formed in mutually asymmetrical shapes. For example, each of the antenna elements 130 and 140 may be formed of at least one of a meander type, a spiral type, a step type, and a loop type. The antenna elements 130 and 140 are made of a conductive material. Here, the antenna elements 130 and 140 may include at least one of Ag, Pd, Pt, Cu, Au, and Ni.

Also, the antenna elements 130 and 140 are individually in contact with the transmission line. In addition, the antenna elements 130 and 140 are disposed adjacent to the grounding body 120. Here, the antenna elements 130 and 140 may be individually contacted to the grounding member 120. Each of the antenna elements 130 and 140 includes feeders 131 and 141 and grounding parts 133 and 143.

The power feeders 131 and 141 are in contact with the transmission line of the driving substrate 110. At this time, the feed parts 131 and 141 are in contact with the transmission line via one end. One end of each of the feeders 131 and 141 is defined as a feeding point (FP) 132 and 142, respectively. For example, the feed points 132 and 142 can be in contact with the transmission line at a position close to the grounding member 120. [ In other words, the feed points 132 and 142 are not in contact with the grounding member 120. As a result, a signal is supplied from the control module to the power feeders 131 and 141.

The grounding portions 133 and 143 extend from the power feeders 131 and 141, respectively. Here, the grounding portions 133 and 143 can be brought into contact with the grounding member 120. Or the grounding portions 133 and 143 may not be in contact with the grounding member 120 but may be opened. Thus, the grounding parts 133 and 143 are grounded by the grounding body 120 and transmit signals toward the grounding body 120. [

The interference shielding element 150 is provided for shielding interference between the antenna elements 130 and 140 in the antenna apparatus 100. [ That is, the interference shielding element 150 isolates the antenna elements 130 and 140 individually. At this time, the interference shielding element 150 cancels the signals input from the antenna elements 130 and 140.

The interference shielding element 150 is disposed on the driving substrate 110. Here, the interference shielding element 150 may be disposed on one surface of the driving substrate 110. Here, the interference shielding element 150 may be disposed on the same plane as the antenna elements 130 and 140 on the driving substrate 110, or may be disposed on a different plane. At this time, the interference shielding element 150 is disposed between the antenna elements 130 and 140.

The interference shielding element 150 is connected to the grounding body 120. At this time, the interference shielding element 150 extends from the grounding body 120. Here, the interference shielding element 150 may extend from the grounding body 120 to between the antenna elements 130 and 140. In addition, the interference shielding element 150 is spaced from the antenna elements 130,140. That is, the interference shielding element 150 does not directly contact the antenna elements 130 and 140.

At this time, a plurality of slits 151 and 155 are formed in the interference blocking element 150. In the interference shielding element 150, the slits 151 and 155 provide the propagation path of the incoming signals from the antenna elements 130 and 140. These slits 151 and 155 are formed in a ring type. And the slits 151 and 155 have different sizes. Thus, any one of the slits 151, 155 is formed inside the other one of the slits 151, 155.

The interference shielding element 150 includes a plurality of slit closing portions 153 and 157. In the interference shielding element 150, the slit closing portions 153 and 157 connect the outer side and the inner side of the slits 151 and 155 to provide a transmission path of signals input from the antenna elements 130 and 140. These slit closing portions 153 and 157 close the slits 151 and 155. Here, the slit closing portions 153 and 157 close one of the slits 151 and 155, respectively. Further, the slit closing portions 153 and 157 are disposed corresponding to one another in the antenna elements 130 and 140. Here, the slit closing portions 153 and 157 are formed adjacent to one another in the antenna elements 130 and 140.

That is, the interference shielding element 150 transmits a signal input from the antenna elements 130 and 140 as shown in FIG. Specifically, signals input from the antenna elements 130 and 140 are transmitted along the slits 151 and 155 in the interference blocking element 150. Signals from the antenna elements 130 and 140 are transmitted from the outside of the slits 151 and 155 to the inside of the interference shielding element 150 through the slit closing portions 153 and 157. In other words, signals input from the antenna elements 130 and 140 are transmitted from the interference shielding element 150 to the peripheral region of the slits 151 and 155. At this time, on the outside and inside of the slits 151 and 155, the propagation paths of the signals input from the antenna elements 130 and 140 are formed differently. Thus, in the interference shielding element 150, signals input from the antenna elements 130 and 140 are canceled. Accordingly, the electromagnetic mutual coupling between the antenna elements 130 and 140 is suppressed.

Thus, as the antenna device 100 of the present embodiment includes the interference shielding element 150, the degree of interference S21 between the antenna elements 130 and 140 is reduced. For example, when the antenna apparatus 100 does not include the interference shielding element 150, the degree of interference S21 between the antenna elements 130 and 140 as shown in FIG. 4A is 2.4 GHz band from about -7.8 dB to -6.8 dB. On the contrary, when the antenna apparatus 100 includes the interference shielding element 150, the degree of interference S21 between the antenna elements 130 and 140 as shown in FIG. 4 (b) To about -13.9 dB to -7.1 dB.

As the degree of interference between the antenna elements 130 and 140 is reduced, the operating characteristics S11 and S22 of the antenna elements 130 and 140 are improved. For example, when the antenna device 100 does not include the interference shielding element 150, the operating characteristics S11 and S22 of the antenna elements 130 and 140 as shown in FIG. 5 (a) Gigahertz band from about -10.1 dB to -7.5 dB. On the other hand, when the antenna device 100 includes the interference shielding element 150, the operating characteristics S11, S22 of the antenna elements 130, 140 as shown in FIG. 5 (b) To about -28.8 dB to -4.0 dB. That is, as the antenna apparatus 100 includes the interference shielding element 150, the S parameters of the antenna elements 130 and 140 drop relatively large in the resonance frequency band.

In addition, as the antenna device 100 of the present embodiment includes the interference shielding element 150, the radiation efficiency of the antenna device 100 is improved. In other words, when the antenna apparatus 100 does not include the interference shielding element 150, between the radiation patterns of the antenna elements 130 and 140, as shown in FIG. 6A, . At this time, the radiation efficiency of the antenna device 100 corresponds to approximately 67%. On the other hand, when the antenna device 100 includes the interference shielding element 150, the formation of the interference pattern between the radiation patterns of the antenna elements 130 and 140 as shown in FIG. 6 (b) . In other words, as the antenna device 100 includes the interference shielding element 150, in the radiation patterns of the antenna elements 130 and 140, the directivity is improved. At this time, the radiation efficiency of the antenna device 100 of the present embodiment is approximately 82%.

7 is a perspective view illustrating an antenna device according to another embodiment of the present invention.

7, the antenna device 200 of the present embodiment includes a driving substrate 210, grounding members 221 and 223, antenna elements 235, 237, 245, and 247, and an interference blocking element 250 . In this case, each basic configuration in this embodiment is similar to the corresponding configuration in the above-described embodiment, and therefore, detailed description thereof will be omitted.

However, in this embodiment, the grounding members 221 and 223 are disposed on both sides of the driving substrate 210. [ At this time, the grounding members 221 and 223 are spaced apart from each other via the driving substrate 210. The grounding members 221 and 223 are overlapped with each other with the driving substrate 210 therebetween. Here, though not shown, the grounding members 221 and 223 penetrate the driving substrate 210 and can be connected to each other. For example, the grounding members 221 and 223 may include a first grounding member 221 and a second grounding member 223. Here, the interference preventing element 250 can be connected to the second grounding body 223. On the other hand, although not shown, an interference shielding element 250 may be connected to the first grounding body 223.

In this embodiment, the antenna elements 235, 237, 245, and 247 are disposed on both sides of the driving substrate 210. At this time, the antenna elements 235, 237, 245, and 247 are separated from each other through the driving substrate 210 as well as spaced apart from each other on one side of the driving substrate 210. Further, the antenna elements 235, 237, 245, and 247 overlap each other with the driving substrate 210 therebetween. In addition, the antenna elements 235, 237, 245, and 247 are connected to the grounding bodies 221 and 223. For example, the antenna elements 235, 237, 245, and 247 may include first antenna elements 235 and 245 and second antenna elements 237 and 247. Here, the first antenna elements 235 and 245 may be connected to the first grounding body 221, and the second antenna elements 237 and 247 may be connected to the second grounding body 223.

On the other hand, in the above-described embodiments, an example in which the antenna device includes two antenna elements is described, but the present invention is not limited thereto. That is, even if the antenna apparatus includes three or more antenna elements, implementation of the present invention is possible. At this time, the antenna device may include one interference blocking element, and may include two or more interference blocking elements. For example, if the antenna device includes one interferer, the interferer can be placed at a spaced distance similar to all the antenna elements. At this time, the number of slits corresponding to the number of antenna elements may be formed in the interference shielding element. And the interference shielding element may include a number of slit closures corresponding to the number of slits. Here, the slit closing portions correspond to any one of the different ones in the antenna elements, so that the slits can be closed individually. Or when the antenna device comprises a plurality of interference shielding elements, each interference shielding element may be arranged between the two antenna elements.

According to the present invention, in operation of the antenna device, electromagnetic mutual coupling between the antenna elements is suppressed. That is, the interference shielding element cancels the incoming signals from the antenna elements, thereby suppressing interference between the antenna elements. This improves the performance of the antenna device. Further, the performance of the communication terminal is improved. In addition, even if the antenna elements are disposed adjacent to each other in the antenna apparatus, the operation performance of the antenna apparatus can be ensured. Thus, it is possible to realize miniaturization of the antenna device. Furthermore, miniaturization of the communication terminal is possible.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of the present invention in order to facilitate the understanding of the present invention and are not intended to limit the scope of the present invention. That is, it will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible.

100, 200: Antenna device
110, 210: driving substrate
120, 221, 223:
130, 140, 235, 237, 245, 247: antenna element
150, 250: Interference blocking element
151, 155: slit
153, 157: slit closing part

Claims (8)

A plurality of antenna elements,
And a plurality of ring-shaped slits are formed in the slit, and an interference shielding element for transmitting and receiving signals flowing from the antenna elements along the slits. The method according to claim 1,
Wherein one of the slits is formed inside the other one of the slits. The apparatus of claim 1,
And a slit closing portion that closes any one of the slits corresponding to any one of the antenna elements. The apparatus of claim 1,
And an antenna element disposed between the antenna elements. The method according to claim 1,
And a grounding body for grounding the antenna elements. 6. The apparatus of claim 5,
And an antenna device connected to the grounding body. 2. The antenna of claim 1,
Antenna device operating in the same resonant frequency band. 2. The antenna of claim 1,
Antenna device supporting bluetooth communication method and Wi-Fi communication method.
KR1020130089128A 2013-07-26 2013-07-26 Antenna apparatus KR20150012932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130089128A KR20150012932A (en) 2013-07-26 2013-07-26 Antenna apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130089128A KR20150012932A (en) 2013-07-26 2013-07-26 Antenna apparatus

Publications (1)

Publication Number Publication Date
KR20150012932A true KR20150012932A (en) 2015-02-04

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KR1020130089128A KR20150012932A (en) 2013-07-26 2013-07-26 Antenna apparatus

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016186304A1 (en) * 2015-05-19 2016-11-24 엘지이노텍(주) Communication module and communication device including same
WO2021054517A1 (en) * 2019-09-20 2021-03-25 주식회사 파트론 Highly efficient antenna structure implemented in printed circuit board
KR20210034742A (en) * 2019-09-20 2021-03-31 (주)파트론 Antenna structure
CN113410643A (en) * 2021-05-19 2021-09-17 荣耀终端有限公司 Terminal equipment with noise suppression structure

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016186304A1 (en) * 2015-05-19 2016-11-24 엘지이노텍(주) Communication module and communication device including same
KR20160136025A (en) * 2015-05-19 2016-11-29 엘지이노텍 주식회사 Communication module and communication apparatus including the same
US10270163B2 (en) 2015-05-19 2019-04-23 Lg Innotek Co., Ltd. Communication module and communication device including same
WO2021054517A1 (en) * 2019-09-20 2021-03-25 주식회사 파트론 Highly efficient antenna structure implemented in printed circuit board
KR20210034744A (en) * 2019-09-20 2021-03-31 (주)파트론 Antenna structure
KR20210034742A (en) * 2019-09-20 2021-03-31 (주)파트론 Antenna structure
CN113410643A (en) * 2021-05-19 2021-09-17 荣耀终端有限公司 Terminal equipment with noise suppression structure

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