KR20170061295A - Antenna structure - Google Patents
Antenna structure Download PDFInfo
- Publication number
- KR20170061295A KR20170061295A KR1020150166106A KR20150166106A KR20170061295A KR 20170061295 A KR20170061295 A KR 20170061295A KR 1020150166106 A KR1020150166106 A KR 1020150166106A KR 20150166106 A KR20150166106 A KR 20150166106A KR 20170061295 A KR20170061295 A KR 20170061295A
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- KR
- South Korea
- Prior art keywords
- extension line
- antenna
- antenna element
- ground
- antenna elements
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
Abstract
An antenna structure is disclosed. An antenna structure of the present invention includes an antenna structure installed in an electronic device supporting wireless communication, the antenna structure including first and second terminals connected to a signal processing unit for processing a transmission / reception signal of the wireless communication, A first and a second antenna element connected to each other and formed to be spaced apart from each other, a grounding part having a ground potential for the first and second antenna elements, and a conductive pattern extending from the grounding part, And a ground extension line formed between the elements so as to be spaced apart from the first and second antenna elements by a predetermined distance.
Description
The present invention relates to an antenna structure for wireless communication, and more particularly, to an antenna structure capable of improving isolation between two adjacent antennas.
Recent wireless communication-enabled electronic devices, such as smart phones, tablet computers, laptop computers, and various wearable electronic devices, offer complex functions. For example, in addition to conventional telephone and text message transmission and reception functions, it also provides functions such as Internet access, broadcast reception, short-range wireless communication, and electronic banking. In addition, the speed of wireless communication for realizing such functions is also rapidly improving.
To this end, modern electronic devices may include more than one antenna. For example, the electronic device includes two or more antennas for cellular communication, various wireless communication antennas such as Wi-Fi, Bluetooth and NFC, an antenna for GPS, and an antenna for broadcast reception.
Preferably, the plurality of antennas are spaced apart by more than half (? / 2) of the wavelength of the frequency band in which the antenna operates. However, if two or more antennas are located adjacent to each other and operate simultaneously, interference may occur between the antennas. If such interference is not sufficiently suppressed, antenna performance may deteriorate.
One example of a conventional technique for solving such a problem is proposed in Korean Patent Publication No. 2010-0097774 (published on Sep. 06, 2010).
In particular, recent wireless communication electronic devices are mostly mobile devices, and are becoming smaller and slimmer. In addition, in recent electronic devices, a plurality of electronic parts must be mounted in order to provide various functions. Therefore, the plurality of antennas may not be arranged sufficiently apart from each other, so isolation may not be ensured.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an antenna structure in which isolation between two antenna elements can be sufficiently secured.
It is another object of the present invention to provide an antenna structure which can easily change a band where isolation is maximized as an operating band of an antenna element is changed.
It is still another object of the present invention to provide an antenna structure in which isolation between two antennas is sufficiently ensured while space utilization is maximized within an electronic device.
According to an aspect of the present invention, there is provided an antenna structure for an electronic device supporting wireless communication, the antenna structure including first and second terminals connected to a signal processing unit for processing a transmission / reception signal of the wireless communication, First and second antenna elements connected to the first and second terminals and formed to be spaced apart from each other, a grounding part having a ground potential for the first and second antenna elements, And a ground extension line formed between the first and second antenna elements so as to be spaced apart from the first and second antenna elements by a predetermined distance.
In one embodiment of the present invention, the ground extension line can improve the isolation between the first and second antenna elements in a predetermined frequency band.
In one embodiment of the present invention, the predetermined frequency band may at least partially overlap with a frequency band in which the first or second antenna element operates.
In one embodiment of the present invention, the ground extension line may include first and second extension lines extending in two different portions of the ground portion.
In one embodiment of the present invention, the first extension line is located closer to the first antenna element than the second extension line, and the distance A between the first and second extension lines is A, And a separation distance between the first antenna element and the first antenna element is B, then A may be smaller than B.
In one embodiment of the present invention, the ground extension line may further include a connection portion connecting the first extension line and the second extension line at a position spaced apart from the grounding portion.
In an embodiment of the present invention, the connection portion may include a capacitor connected between the first and second extension lines.
In one embodiment of the present invention, the first and second extension lines may include protrusions protruding from the grounding portion and extending so as to traverse the first and second antenna elements, and a bent portion bent at one end of the protrusions Section.
In one embodiment of the present invention, the first extension line is located closer to the first antenna element than the second extension line, and the bent portion of the first extension line is bent in the direction of the first antenna, The bent portion of the second extension line may be bent in the direction of the second antenna.
In one embodiment of the present invention, the bent portions of the first and second extension lines may be bent and bent in opposite directions at one end of each protrusion.
In one embodiment of the present invention, the first extension line is located closer to the first antenna element than the second extension line, and the separation distance between the protrusion on the first extension line and the first antenna element is B And B is a distance between the first extension line and the first antenna element.
In one embodiment of the present invention, the first extension line is located closer to the first antenna element than the second extension line, and the separation distance between the protrusion on the second extension line and the second antenna element is B And B is a distance between the bent portion of the second extension line and the second antenna element.
In an embodiment of the present invention, the relationship B < 0.5xC can be satisfied.
The antenna structure according to an embodiment of the present invention can ensure sufficient isolation between the two antenna elements.
In addition, the antenna structure according to an embodiment of the present invention can easily change the band where the isolation is maximized as the operating band of the antenna element is changed.
Also, the antenna structure according to an embodiment of the present invention can maximize the space utilization in the electronic device while ensuring sufficient isolation between the two antennas.
FIG. 1 schematically shows a part of an electronic device in which an antenna structure according to an embodiment of the present invention is installed.
2 is a simulation result of a conventional antenna structure.
3 is a simulation result of an antenna structure according to an embodiment of the present invention.
FIG. 4 shows simulation results of the conventional antenna structure shown in FIG. 2 and FIG. 3 and the antenna structure according to an embodiment of the present invention in one coordinate plane.
FIG. 5 schematically shows a part of an electronic device in which an antenna structure according to another embodiment of the present invention is installed.
6 is a simulation result of an antenna structure according to another embodiment of the present invention.
FIG. 7 shows simulation results of the conventional antenna structure shown in FIG. 2 and FIG. 6 and the antenna structure according to another embodiment of the present invention in one coordinate plane.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is judged that adding a detailed description of a technique or a configuration already known in the field can make the gist of the present invention unclear, some of it will be omitted from the detailed description. In addition, terms used in the present specification are terms used to appropriately express the embodiments of the present invention, which may vary depending on the person or custom in the relevant field. Therefore, the definitions of these terms should be based on the contents throughout this specification.
Hereinafter, an antenna structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4 attached hereto.
The antenna structure of the present invention is installed in an electronic device supporting wireless communication. Electronic devices that support wireless communication include, for example, smartphones. A tablet computer, a mobile communication terminal, a repeater device, a wearable electronic device such as a smart watch, a lap-top computer, a multimedia reproduction device, a navigation device, and a personal information terminal.
Fig. 1 schematically shows a part of the electronic device in which an antenna structure is installed. Other electronic components that may be mounted in the vicinity of the antenna structure in the electronic device are not separately shown in the drawings for convenience of explanation.
1, the antenna structure includes a plurality of
Here, there may be a plurality of terminals and antenna elements, and the present invention is not limited to the number of terminals and antenna elements. However, in the following description, it is assumed that there are two terminals and two antenna elements. Those skilled in the art will appreciate that the main features of the present invention can also be applied when the number of terminals and antennas is three or more.
The terminal includes a first terminal (101) and a second terminal (102). The
The
The antenna element includes a
The first and
The first and
The first and
The first and
The first and
The first and
The grounding
The
The
The
The first and
The first and
Assuming that a separation distance between the first and
Similarly, if A is the separation distance between the first and
A distance between the
The distance between the protruding
The
Hereinafter, the effect of improving the isolation of the antenna structure of the present invention will be described with reference to FIGS. 2 and 4. FIG.
2 is a simulation result of a conventional antenna structure, which is a simulation result of an antenna structure in which a separate
Here, the first and
Values of respective parameters at 2300 MHz, 2550 MHz, and 2800 MHz in the graph of FIG. 2 are summarized in Table 1 below.
Referring to FIG. 2 and Table 1, S21 corresponding to the isolation characteristic is -6.53 dB at a frequency of 2300 MHz, -5.85 dB at a frequency of 2550 MHz, and -11.20 dB at a frequency of 2800 MHz.
3 is a simulation result of an antenna structure according to an embodiment of the present invention. As a result of simulation of an antenna structure in which a separate
Here, the
2, the first and
Values of respective parameters at 2300 MHz, 2550 MHz, and 2800 MHz in the graph of FIG. 3 are summarized in Table 2 below.
Referring to FIG. 3 and FIG. 2, it can be seen that S21 corresponding to the isolation characteristic is -13.82 dB at a frequency of 2300 MHz, -22.91 dB at a frequency of 2550 MHz, and -13.20 dB at a frequency of 2800 MHz.
FIG. 4 shows simulation results of the conventional antenna structure shown in FIG. 2 and FIG. 3 and the antenna structure according to an embodiment of the present invention in one coordinate plane. Table 3 summarizes S21 values and changes of the conventional antenna structure and the antenna structure of the present invention.
Referring to FIGS. 4 and 3, the S21 of the antenna structure of the present invention showed a decrease of 7.29 dB at a frequency of 2300 MHz, a decrease of 17.06 dB at a frequency of 2550 MHz, a frequency of 2.00 at a frequency of 2800 MHz dB is decreased.
The decrease in S21 means that the isolation between the first and
Also, referring to FIG. 4, S11 and S22 of the antenna structure of the present invention are increased at a frequency of 2300 MHz compared to the conventional antenna structure. The fact that the values of S11 and S22 are increased means that the gain of the antenna is lowered in the corresponding frequency band. The antenna structure of the present invention has a gain lower than that of a conventional antenna structure in a certain frequency band, but the decrease in gain is comparatively tolerable compared with improvement in isolation. Particularly, in recent antenna structures in electronic devices, it is often more important to ensure isolation than to secure gain. Therefore, the improvement of the isolation of the antenna structure according to the present invention can be considerably useful for modern electronic devices.
Hereinafter, an antenna structure according to another embodiment of the present invention will be described with reference to FIGS. The present embodiment will be described mainly on the points different from the above-described embodiment.
5 schematically shows a part of the electronic device in which an antenna structure is installed. Other electronic components that may be mounted in the vicinity of the antenna structure in the electronic device are not separately shown in the drawings for convenience of explanation.
Referring to FIG. 5, the
Hereinafter, the effect of improving the isolation of the antenna structure of the present invention will be described with reference to FIGS. 6 and 7. FIG.
FIG. 6 is a simulation result of an antenna structure according to another embodiment of the present invention. As shown in FIG. 6, a simulation of an antenna structure in which a separate
The
The first and
Values of respective parameters at 2300 MHz, 2550 MHz, and 2800 MHz in the graph of FIG. 6 are summarized in Table 4 below.
Referring to FIG. 6 and FIG. 4, it can be seen that S21 corresponding to the isolation characteristic is -30.70 dB at a frequency of 2300 MHz, -18.23 dB at a frequency of 2550 MHz, and -14.75 dB at a frequency of 2800 MHz.
Fig. 7 shows simulation results of the conventional antenna structure shown in Figs. 2 and 5 and the antenna structure of another embodiment of the present invention in one coordinate plane. Table 5 summarizes S21 values and changes of the conventional antenna structure and the antenna structure of the present invention.
Referring to FIGS. 7 and 5, the S21 of the antenna structure of the present invention showed a reduction of 24.17 dB at a frequency of 2300 MHz, a decrease of 12.38 dB at a frequency of 2550 MHz, and a decrease of 3.55 dB is decreased.
The decrease in S21 means that the isolation between the first and
Comparing FIG. 4 and Table 3 with FIG. 7 and Table 5, the difference between the embodiment shown in FIG. 1 and the embodiment shown in FIG. 5 can be seen. It can be seen that the other embodiment shown in Fig. 5 has a better effect of improving the isolation at some frequencies as compared with the embodiment shown in Fig. In particular, it can be seen that the other embodiment shown in FIG. 5 has a relatively excellent isolation improvement result in the vicinity of 2800 MHz where the isolation is slightly improved in the embodiment shown in FIG.
The embodiments of the antenna structure of the present invention have been described above. The present invention is not limited to the above-described embodiments and the accompanying drawings, and various modifications and changes may be made by those skilled in the art to which the present invention pertains. Therefore, the scope of the present invention should be determined by the equivalents of the claims and the claims.
101: first terminal 102: second terminal
201: first antenna element 202: second antenna element
250: Ground unit 300: Ground extension line
310: first extension line 311: protrusion to first extension line
312: bend of first extension line 320: second extension line
321: protruding portion to second extension line 322: bent portion to second extension line
330: Connection
Claims (13)
First and second terminals connected to a signal processing unit for processing a transmission / reception signal of the wireless communication;
First and second antenna elements connected to the first and second terminals, respectively, and spaced apart from each other;
A grounding portion having a ground potential for the first and second antenna elements; And
And a ground extension line formed between the first and second antenna elements so as to be spaced apart from the first and second antenna elements by a predetermined distance.
Wherein the ground extension line enhances isolation between the first and second antenna elements in a predetermined frequency band.
Wherein the predetermined frequency band overlaps at least partially with a frequency band in which the first or second antenna element operates.
Wherein the ground extension line includes first and second extension lines extending in two different portions of the grounding portion.
Wherein the first extension line is located closer to the first antenna element than the second extension line,
A is a distance A between the first extension line and the second extension line, and B is a distance between the first extension line and the first antenna element.
Wherein the ground extension line further includes a connection portion connecting the first and second extension lines at a position spaced apart from the ground portion.
And the connection portion includes a capacitor connected between the first and second extension lines.
As the first and second extension lines,
A protrusion protruding from the ground portion and extending across the first and second antenna elements; And
And a bent portion bent at one end of the protrusion.
Wherein the first extension line is located closer to the first antenna element than the second extension line,
Wherein the bent portion of the first extension line is bent in the direction of the first antenna,
And the bent portion of the second extension line is bent in the direction of the second antenna.
Wherein the bent portions to the first and second extension lines are bent and extended in opposite directions at one ends of the respective projecting portions.
Wherein the first extension line is located closer to the first antenna element than the second extension line,
B is a distance between the first extension line and the first antenna element is B, and B is a distance between the first extension line and the first antenna element.
Wherein the first extension line is located closer to the first antenna element than the second extension line,
B is C, where B is a spacing distance between the protruding portion to the second extension line and the second antenna element, and C is a spacing distance between the bent portion to the second extension line and the second antenna element.
B < 0.5xC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150166106A KR20170061295A (en) | 2015-11-26 | 2015-11-26 | Antenna structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150166106A KR20170061295A (en) | 2015-11-26 | 2015-11-26 | Antenna structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20170061295A true KR20170061295A (en) | 2017-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| KR1020150166106A KR20170061295A (en) | 2015-11-26 | 2015-11-26 | Antenna structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108232436A (en) * | 2017-12-19 | 2018-06-29 | 中国计量大学 | A kind of high isolation multi-input/output antenna based on parasitic ground structure |
| CN112736419A (en) * | 2019-10-29 | 2021-04-30 | 纬创资通股份有限公司 | Antenna system |
| CN113054428A (en) * | 2019-12-29 | 2021-06-29 | 昆山睿翔讯通通信技术有限公司 | Antenna structure for improving isolation and mobile terminal |
| WO2023090498A1 (en) * | 2021-11-22 | 2023-05-25 | 엘지전자 주식회사 | Antenna module disposed in vehicle |
-
2015
- 2015-11-26 KR KR1020150166106A patent/KR20170061295A/en not_active Application Discontinuation
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108232436A (en) * | 2017-12-19 | 2018-06-29 | 中国计量大学 | A kind of high isolation multi-input/output antenna based on parasitic ground structure |
| CN108232436B (en) * | 2017-12-19 | 2020-02-21 | 中国计量大学 | High-isolation multi-input multi-output antenna based on parasitic ground structure |
| CN112736419A (en) * | 2019-10-29 | 2021-04-30 | 纬创资通股份有限公司 | Antenna system |
| US11145967B2 (en) * | 2019-10-29 | 2021-10-12 | Wistron Corp. | Antenna system |
| CN113054428A (en) * | 2019-12-29 | 2021-06-29 | 昆山睿翔讯通通信技术有限公司 | Antenna structure for improving isolation and mobile terminal |
| WO2023090498A1 (en) * | 2021-11-22 | 2023-05-25 | 엘지전자 주식회사 | Antenna module disposed in vehicle |
| US11876287B2 (en) | 2021-11-22 | 2024-01-16 | Lg Electronics Inc. | Antenna module disposed in vehicle |
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