CN112290196A

CN112290196A - Antenna structure

Info

Publication number: CN112290196A
Application number: CN201910665627.1A
Authority: CN
Inventors: 戴志峰; 赖冠勋; 王癸程
Original assignee: Wistron Neweb Corp
Current assignee: Wistron Neweb Corp
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2021-01-29
Anticipated expiration: 2039-07-23
Also published as: CN112290196B

Abstract

The invention discloses an antenna structure. The antenna structure includes: a first radiation element, a second radiation element and a feed-in element; the first radiation element comprises a first radiation part, a second radiation part and a feed-in part coupled between the first radiation part and the second radiation part; the second radiation element comprises a third radiation part, a fourth radiation part and a grounding part coupled between the third radiation part and the fourth radiation part, wherein the third radiation part and the first radiation part are separated from each other and coupled with each other, the third radiation part and the second radiation part are separated from each other and coupled with each other, and the fourth radiation part and the first radiation part are separated from each other and coupled with each other; the feed-in element is coupled between the feed-in part and the grounding part. The present invention can provide an operating frequency band applied by the fifth generation mobile communication technology by the technical scheme of "the fourth radiation part and the first radiation part are separated from each other and coupled with each other".

Description

Antenna structure

Technical Field

The present invention relates to an antenna structure, and more particularly, to an antenna structure having an operating frequency band applied to fourth and fifth generation mobile communication technologies.

Background

With the development of the fifth Generation Mobile communication technology (5th Generation Mobile Networks, 5G), the design of the existing antenna structure has been unable to meet the operating frequency band of the fifth Generation communication system. Generally, in order to further support the 5G operating band, the conventional products are provided with an additional antenna supporting the 5G operating band, but when the conventional products are designed to be miniaturized, it is difficult to add one 5G antenna in an extra space.

Therefore, how to overcome the above-mentioned drawbacks by improving the design of the antenna structure has become one of the important issues to be solved by the industry.

Therefore, it is desirable to provide an antenna structure to solve the above problems.

Disclosure of Invention

The present invention is directed to an antenna structure having an operating frequency band applied to fourth and fifth generation mobile communication technologies, which is adapted to overcome the shortcomings of the prior art.

In order to solve the above technical problem, one of the technical solutions adopted by the present invention is to provide an antenna structure, including: a first radiation element, a second radiation element and a feed-in element; the first radiation element comprises a first radiation part, a second radiation part and a feed-in part coupled between the first radiation part and the second radiation part; the second radiation element comprises a third radiation part, a fourth radiation part and a grounding part coupled between the third radiation part and the fourth radiation part, wherein the third radiation part and the first radiation part are separated from each other and coupled with each other, the third radiation part and the second radiation part are separated from each other and coupled with each other, and the fourth radiation part and the first radiation part are separated from each other and coupled with each other; the feed-in element is coupled between the feed-in part and the grounding part.

One of the advantages of the present invention is that the antenna structure provided by the present invention can provide an operating frequency band applied by the fifth generation mobile communication technology through the technical scheme of "the fourth radiation portion and the first radiation portion are separated and coupled with each other".

For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.

Drawings

Fig. 1 is a schematic top view of an antenna structure according to a first embodiment of the present invention.

Fig. 2 is a schematic top view of an antenna structure according to a second embodiment of the present invention.

Fig. 3 is a schematic top view of an antenna structure according to a third embodiment of the present invention.

Fig. 4 is a schematic top view of an antenna structure according to a fourth embodiment of the present invention.

Fig. 5 is a graph of the vswr of the antenna structure of fig. 4 at different frequencies.

Fig. 6 is a schematic top view of an antenna structure according to a fifth embodiment of the present invention.

Fig. 7 is another schematic top view of an antenna structure according to a fifth embodiment of the present invention.

Description of the main component symbols:

bevel edge of U-shaped antenna structure 221

S substrate 23 grounding part

1 edge of the first radiating element 230

11 first radiating part 3 feed-in element

111 first body 31 feed end

112 first protrusion 32 ground

113 first tank 4 grounding piece

12 second radiation portion 40 edge

121 first radiator 5 bridge

122 second radiator F feed

123 third radiator C surrounding area

1231 first segment L1 first predetermined distance

1232 second segment L2 second predetermined distance

13 first predetermined width of feed part W1

131 oblique side W2 second predetermined width

2 third predetermined width of the second radiating element W3

21 fourth predetermined width of the third radiating portion W4

211 fifth predetermined width of the second body W5

212 second projection G1 first predetermined spacing

213 second groove G2 second predetermined distance

214 connecting body P with a predetermined length

22 fourth radiating part T groove

220 direction of edge X, Y

M1, M2, M3, M4, M5, M6, M7, M8, M9 and M10 nodes

Detailed Description

The following is a description of the embodiments of the present disclosure related to "antenna structure" by specific embodiments, and those skilled in the art can understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the specification and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used primarily to distinguish one element from another. Additionally, the term "or," as used herein, is intended to encompass any one or combination of more of the associated listed items, as the case may be.

[ first embodiment ]

First, please refer to fig. 1, in which fig. 1 is a schematic top view of an antenna structure according to a first embodiment of the present invention. A first embodiment of the present invention provides an antenna structure U, which includes: a first radiation element 1, a second radiation element 2 and a feed-in element 3. In addition, the antenna structure U may further include a substrate S, the first radiation element 1 and the second radiation element 2 may be disposed on the substrate S, and the feeding element 3 may be coupled between the first radiation element 1 and the second radiation element 2. For example, the first radiation element 1 and the second radiation element 2 may be a metal sheet, a metal wire or other conductive body with conductive effect, and the feeding element 3 may be a Coaxial cable (Coaxial cable), but the invention is not limited thereto. In addition, the feeding element 3 may have a feeding end 31 and a grounding end 32, the feeding end 31 may be coupled to the first radiation element 1, and the grounding end 32 may be coupled to the second radiation element 2. In addition, it should be noted that the coupling in the present invention can be directly or indirectly connected, or directly or indirectly connected, and the present invention is not limited thereto. In addition, it should be noted that the coupling in the present invention is not a physical connection between two elements, but rather the electric field energy (electric field energy) generated by the current of one element excites the electric field energy of the other element.

As mentioned above, the antenna structure U may further include a grounding element 4, and the grounding element 4 may be coupled to the second radiating element 2. In addition, in a preferred embodiment, the antenna structure U may further include a bridge 5, and the bridge 5 may be coupled between the second radiating element 2 and the ground element 4. It should be noted that the bridge 5 is provided to allow the grounding member 4 to be easily connected to the second radiation member 2, and although it is described in the embodiment of fig. 1 that the bridge 5 may be further provided, in other embodiments, the bridge 5 may not be provided. It should be noted that, for example, the material of the bridge 5 may be tin or other conductive material, and the material of the grounding element 4 may be copper or other conductive material, but the invention is not limited thereto.

Then, the first radiation element 1 may include a first radiation portion 11, a second radiation portion 12, and a feeding portion 13 coupled between the first radiation portion 11 and the second radiation portion 12. The second radiation element 2 may include a third radiation portion 21, a fourth radiation portion 22 and a grounding portion 23 coupled between the third radiation portion 21 and the fourth radiation portion 22. The feeding element 3 may be coupled between the feeding portion 13 and the grounding portion 23, and the feeding end 31 of the feeding element 3 may be coupled to the feeding portion 13, and the grounding end 32 of the feeding element 3 is coupled to the grounding portion 23. Further, the ground 4 may be coupled to the ground 23 of the second radiator 2, and preferably, the ground 4 and the ground 23 may be connected to each other using a bridge 5.

As mentioned above, the first radiation portion 11 may extend toward a first direction (positive X direction) relative to the feeding portion 13, and the second radiation portion 12 may extend toward a second direction (negative X direction) relative to the feeding portion 13, that is, the first radiation portion 11 may be disposed on one side (for example, but not limited to, the right side) of the feeding portion 13, and the second radiation portion 12 may be disposed on the other side (for example, but not limited to, the left side) of the feeding portion 13, but the invention is not limited thereto. In addition, the third radiation portion 21, the grounding portion 23 and the fourth radiation portion 22 can form a surrounding area C, and the first radiation member 1 is disposed in the surrounding area C. For example, the surrounding area C may be similar to a "C" shape, and the space of the "C" shape may surround three sides of the first radiation element 1, but the invention is not limited thereto.

Next, the second radiation part 12 may include a first radiator 121 coupled to the feeding part 13, a second radiator 122 coupled to the first radiator 121 and disposed to be turned with respect to the first radiator 121, and a third radiator 123 coupled to the second radiator 122 and disposed to be turned with respect to the second radiator 122. The first radiation part 11 can extend towards a first direction (positive X direction) relative to the feeding part 13. In addition, the first radiator 121 of the second radiation part 12 may extend toward a second direction (negative X direction) with respect to the feeding part 13, the second radiator 122 of the second radiation part 12 may extend toward a third direction (positive Y direction) with respect to the first radiator 121, and the third radiator 123 of the second radiation part 12 may extend toward the first direction (positive X direction) with respect to the second radiator 122. In addition, the fourth radiation portion 22 may be coupled to the grounding portion 23 and extend toward the first direction (positive X direction) relative to the feeding portion 13. In the present invention, the first direction, the second direction and the third direction may be different from each other, that is, the first direction and the second direction may be opposite to each other, the first direction and the third direction are perpendicular to each other, and the second direction and the third direction are perpendicular to each other.

Then, a connection point between the feeding end 31 of the feeding element 3 and the feeding portion 13 may be defined as a feeding point F, a first predetermined distance L1 may be provided between the feeding point F and an edge 230 of the grounding portion 23, a second predetermined distance L2 may be provided between the feeding point F and an edge 220 of the fourth radiating portion 22, and the second predetermined distance L2 is greater than the first predetermined distance L1. In other words, the first predetermined distance L1 and the second predetermined distance L2 are distances measured in a direction toward the first direction (positive X direction) with reference to the feeding point F. Further, in one embodiment, a groove T can be formed at a connection between the fourth radiation portion 22 and the grounding portion 23, and a step difference is formed between the fourth radiation portion 22 and the grounding portion 23, that is, a height difference is formed between the fourth radiation portion 22 and the grounding portion 23 in the third direction (positive Y direction). It should be noted that, in other embodiments, a first predetermined distance L1 may be provided between the feeding point F and an edge 40 of the ground element 4, a second predetermined distance L2 may be provided between the feeding point F and an edge 220 of the fourth radiation portion 22, and the second predetermined distance L2 may be greater than the first predetermined distance L1.

Next, referring to fig. 1 again, according to the present invention, the third radiation portion 21 and the first radiation portion 11 can be separated and coupled to each other, and the third radiation portion 21 and the second radiation portion 12 can be separated and coupled to each other, so as to generate an operation frequency band with a frequency range between 698MHz and 960 MHz. In addition, the first radiation portion 11 can generate an operation frequency band with a frequency range between 1450MHz and 2300 MHz. In addition, the second radiation portion 12 can generate an operation frequency band with a frequency range between 2300MHz and 2700 MHz. In addition, the fourth radiation portion 22 and the first radiation portion 11 can be separated from each other and coupled to each other to generate an operation frequency band in a frequency range between 3300MHz to 3800 MHz. Furthermore, the first radiation portion 11 can also generate an operation band with a frequency range between 5100MHz and 5850MHz by frequency doubling, and in addition, in the case that the second radiation portion 12 and the third radiation portion 21 are separated and coupled to each other, an operation band with a frequency range between 4600MHz and 5400MHz can also be generated by frequency doubling.

[ second embodiment ]

First, please refer to fig. 2, fig. 2 is a schematic top view of an antenna structure according to a second embodiment of the present invention, and as can be seen from a comparison between fig. 2 and fig. 1, the biggest difference between the second embodiment and the first embodiment is that the overall performance of the antenna structure U can be further improved by adjusting the structure of the first radiating element 1 of the antenna structure U provided in the second embodiment. It should be noted that other structural features shown in the second embodiment are similar to those described in the foregoing embodiments, and are not repeated herein. In addition, the ground contact 4 and the bridge 5 are omitted for simplicity of the drawing.

In this regard, the first radiator 121 may have a first predetermined width W1, the second radiator 122 may have a second predetermined width W2, the third radiator 123 may have a third predetermined width W3, the second predetermined width W2 may be greater than the third predetermined width W3, and the third predetermined width W3 may be greater than the first predetermined width W1. In addition, the feeding element 13 may have a fourth predetermined width W4, and the fourth predetermined width W4 may be greater than the first predetermined width W1. Therefore, compared to the first predetermined width W1 of the first radiator 121, the second predetermined width W2 of the second radiator 122, and the third predetermined width W3 of the third radiator 123 in the first embodiment, the antenna structure U in the second embodiment can increase the bandwidth of the operating band in the frequency range between 4600MHz and 5400MHz generated by the antenna structure U, and improve the radiation performance. Furthermore, in the first embodiment, the radiation performance of only the operating band between 4600MHz and 4800MHz among the operating bands between 4600MHz and 5400MHz generated by the antenna structure U is better, but in the second embodiment, the radiation performance of all the operating bands between 4600MHz and 5400MHz generated by the antenna structure U is better.

[ third embodiment ]

First, please refer to fig. 3, wherein fig. 3 is a schematic top view of an antenna structure according to a third embodiment of the present invention. As can be seen from a comparison between fig. 3 and fig. 2, the biggest difference between the third embodiment and the second embodiment is that the overall performance of the antenna structure U can be further improved by adjusting the structure of the first radiation element 1 of the antenna structure U provided by the third embodiment. It should be noted that other structural features shown in the third embodiment are similar to those described in the foregoing embodiments, and are not repeated herein.

In view of the above, the first radiation part 11 may include a first body 111 coupled to the feeding part 13, a first protrusion 112 coupled to the first body 111 and protruding toward the third radiation part 21, and a first slot 113 recessed relative to the first body 111. In addition, the first body 111 of the first radiation portion 11 may extend toward a first direction (positive X direction) relative to the feeding portion 13, the first protrusion 112 may extend toward a third direction (positive Y direction), and the first slot 113 may be recessed toward a third direction (positive Y direction). Further, in the first direction, a distance between the first protrusion 112 and the feeding location F is smaller than a distance between the first slot 113 and the feeding location F, that is, the first protrusion 112 is closer to the feeding location F than the first slot 113. In addition, the central frequency of the operating band in the frequency range between 5100MHz to 5850MHz generated by the first radiating portion 11 can be adjusted by the arrangement of the first protrusion 112, so that compared with the case that the antenna structure U in the second embodiment is not provided with the first protrusion 112, the antenna structure U in the third embodiment can adjust the central frequency of the operating band in the frequency range between 5100MHz to 5850 MHz. In addition, the bandwidth of the operating frequency band between 1450MHz and 2300MHz and the bandwidth of the operating frequency band between 5100MHz and 5850MHz can be adjusted by the arrangement of the first slot 113.

In view of the above, the feeding portion 13 may have an inclined edge 131, and the fourth radiation portion 22 may have an inclined edge 221, and the inclined edge 131 of the feeding portion 13 and the inclined edge 221 of the fourth radiation portion 22 are opposite to each other and parallel to each other. In addition, by the arrangement of the inclined side 131 of the feeding part 13, the center frequency of the operating frequency band between 1450MHz and 2300MHz and the bandwidth of the operating frequency band between 3300MHz and 3800MHz can be adjusted.

[ fourth embodiment ]

First, please refer to fig. 4, wherein fig. 4 is a schematic top view of an antenna structure according to a fourth embodiment of the present invention. As can be seen from a comparison between fig. 4 and fig. 3, the biggest difference between the fourth embodiment and the third embodiment is that, due to the spatial limitation of the installation positions of some antenna structures U, the peripheral structures of the antenna structure U in the fourth embodiment can be adjusted according to the spatial limitation, so as to improve the overall performance of the antenna structure U. It should be noted that other structural features shown in the fourth embodiment are similar to those described in the foregoing embodiments, and are not repeated herein.

In view of the above, the third radiation portion 21 of the antenna structure U provided by the fourth embodiment may include a second body 211, a connection body 214 connected between the second body 211 and the grounding portion 23, a second protrusion 212 coupled to the second body 211 and protruding toward the second radiation portion 12, and a second slot 213 recessed relative to the second body 211 and corresponding to the second protrusion 212. In addition, the second protrusion 212 may be disposed corresponding to the second groove 213, the second protrusion 212 may extend toward a fourth direction (negative Y direction), and the second groove 213 may be recessed toward the fourth direction (negative Y direction). It should be noted that, since the second protrusion 212 further extends toward the second radiation portion 12 relative to the second body 211, the shape of the third radiator 123 of the second radiation portion 12 must be adjusted accordingly. Further, the third radiator 123 may include a first section 1231 connected to the second radiator 122 and a second section 1232 connected to the first section 1231. The first segment 1231 may have a third predetermined width W3, the second segment 1232 may have a fifth predetermined width W5, and the third predetermined width W3 is greater than the fifth predetermined width W5. Still further, the second predetermined width W2 may be greater than the third predetermined width W3, and the second predetermined width W2 is greater than the fifth predetermined width W5.

Next, referring to fig. 4, and referring to fig. 5 and the following table 1, fig. 5 is a graph of Voltage Standing Wave Ratio (VSWR) of the antenna structure of fig. 4 at different frequencies.

TABLE 1

Node point	Frequency (MHz)	Voltage standing wave ratio
			M1	617	3.3002
M2	704	1.7430
			M3	894	1.4855
M4	960	2.2632
			M5	1710	1.4721
M6	1575	1.8710
			M7	2100	1.5380
M8	2700	1.4722
			M9	3500	1.2145
M10	5100	1.3314

[ fifth embodiment ]

First, referring to fig. 6 and 7, fig. 6 and 7 are schematic top views of an antenna structure according to a fifth embodiment of the present invention. As can be seen from a comparison between fig. 6 and fig. 4 and a comparison between fig. 7 and fig. 4, the biggest difference between the fifth embodiment and the fourth embodiment is that the overall performance of the antenna structure U can be further improved by adjusting the structure of the fourth radiation portion 22 of the antenna structure U provided by the fifth embodiment. It should be noted that other structural features shown in the fifth embodiment are similar to those described in the foregoing embodiments, and are not repeated herein.

In view of the above, referring to fig. 6, the fourth radiation portion 22 may have a predetermined length P between 11.5 mm and 13 mm to adjust the center frequency of the operating band between 3300MHz and 3800MHz, but the invention is not limited thereto. In addition, a first predetermined gap G1 between the fourth radiation portion 22 and the feeding portion 13 in a first direction (positive X direction) is between 1 mm and 2 mm.

In view of the above, referring to fig. 7, a second predetermined distance G2 between the first radiation portion 11 and the fourth radiation portion 22 in a third direction (positive Y direction) is between 0.5 mm and 3.5 mm, preferably, the second predetermined distance G2 may be between 1 mm and 3.5 mm, but the invention is not limited thereto. In other words, the distance of the second predetermined interval G2 may be changed by adjusting the width of the fourth radiating portion 22.

[ advantageous effects of the embodiments ]

One of the advantages of the present invention is that the antenna structure U provided by the present invention can provide the operating frequency band applied by the fifth generation mobile communication technology by the technical solution of "the fourth radiation portion 22 and the first radiation portion 11 are separated and coupled with each other".

Furthermore, the antenna structure U provided by the present invention can utilize a feeding element 3 to generate an operating band with a frequency range between 698MHz to 960MHz, a frequency range between 1450MHz to 2300MHz, and a frequency range between 2300MHz to 2700MHz for 4G LTE (Long Term Evolution), and can also generate an operating band with a frequency range between 5100MHz to 5850MHz for 5G LAA (localized Assisted Access), and can also generate an operating band with a frequency range between 3300MHz to 3800MHz for Sub 6GHz in the 5G operating band. Therefore, the operating frequency bands applied by the fourth generation mobile communication technology and the fifth generation mobile communication technology can be realized under the framework of the same antenna structure U.

The disclosure above is only a preferred embodiment of the present invention, and is not intended to limit the claims, so that all technical equivalents made by the disclosure of the present invention and the accompanying drawings are included in the claims.

Claims

1. An antenna structure, comprising:

a first radiation element, the first radiation element comprising a first radiation part, a second radiation part and a feed-in part coupled between the first radiation part and the second radiation part;

a second radiation element, including a third radiation portion, a fourth radiation portion and a grounding portion coupled between the third radiation portion and the fourth radiation portion, wherein the third radiation portion and the first radiation portion are separated from each other and coupled to each other, the third radiation portion and the second radiation portion are separated from each other and coupled to each other, and the fourth radiation portion and the first radiation portion are separated from each other and coupled to each other; and

a feed-in element coupled between the feed-in part and the grounding part.

2. The antenna structure of claim 1, wherein the third radiating portion, the grounding portion and the fourth radiating portion form a surrounding area, and the first radiating element is disposed in the surrounding area.

3. The antenna structure of claim 1, wherein a connection point between the feeding element and the feeding portion is a feeding point, a first predetermined distance is provided between the feeding point and an edge of the grounding portion, a second predetermined distance is provided between the feeding point and an edge of the fourth radiating portion, and the second predetermined distance is greater than the first predetermined distance.

4. The antenna structure of claim 1, wherein the second radiating portion comprises a first radiator coupled to the feeding portion, a second radiator coupled to the first radiator and disposed to be turned with respect to the first radiator, and a third radiator coupled to the second radiator and disposed to be turned with respect to the second radiator; the first radiator has a first predetermined width, the second radiator has a second predetermined width, the third radiator has a third predetermined width, the second predetermined width is greater than the third predetermined width, and the third predetermined width is greater than the first predetermined width.

5. The antenna structure of claim 4, wherein the first radiating portion extends in a first direction, the first radiator of the second radiating portion extends in a second direction, the second radiator of the second radiating portion extends in a third direction, the third radiator of the second radiating portion extends in the first direction, the fourth radiating portion extends in the first direction, and the first direction, the second direction, and the third direction are different from each other.

6. The antenna structure of claim 1, wherein the first radiating portion includes a first body, a first protrusion coupled to the first body and protruding toward the third radiating portion, and a first slot recessed with respect to the first body.

7. The antenna structure of claim 1, wherein the fourth radiating element and the feeding element have a first predetermined distance therebetween in a first direction of 1 mm to 2 mm.

8. The antenna structure of claim 1, wherein the first radiating portion and the fourth radiating portion have a second predetermined spacing in a third direction between 1 mm and 3.5 mm.

9. The antenna structure of claim 1, wherein the fourth radiating portion and the first radiating portion are separated from each other and coupled to each other to generate an operating band with a frequency range between 3300MHz to 3800 MHz.

10. The antenna structure of claim 1, wherein the third radiating portion and the second radiating portion are separated from each other and coupled to each other, and the third radiating portion and the first radiating portion are separated from each other and coupled to each other, so as to generate an operating band with a frequency range between 698MHz and 960 MHz.

11. The antenna structure of claim 1, wherein the first radiating portion is capable of generating an operating band with a frequency range between 1450MHz and 2300MHz and an operating band with a frequency range between 5100MHz and 5850 MHz.

12. The antenna structure of claim 1, wherein the second radiating portion is capable of generating an operating band in a frequency range between 2300MHz and 2700 MHz.

13. The antenna structure of claim 1, wherein the second radiating portion and the third radiating portion are separated from each other and coupled to each other to generate an operating band with a frequency range between 4600MHz to 5400 MHz.