CN211980896U

CN211980896U - Antenna structure

Info

Publication number: CN211980896U
Application number: CN202021165821.8U
Authority: CN
Inventors: 顾梦云; 徐澄宇; 周刚; 陈露; 张万强; 许文恺; 李振华
Original assignee: Kunshan Luxshare RF Technology Co Ltd
Current assignee: Kunshan Luxshare RF Technology Co Ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2020-11-20
Anticipated expiration: 2030-06-22

Abstract

The application discloses antenna structure, it includes: the antenna comprises a substrate, an antenna radiation layer and an antenna grounding layer. The antenna radiation layer is arranged on the substrate and comprises a radiation body and a radiation feeder line, the radiation feeder line is connected with the radiation body and extends along a first direction, the radiation feeder line is provided with a low-frequency radiation part, a medium-frequency radiation part, a high-frequency radiation part and a first feeder line position, the low-frequency radiation part, the medium-frequency radiation part, the high-frequency radiation part and the first feeder line position are arranged along the radiation body in sequence along the first direction, and the first feeder line position is located at one end, far away from the radiation body, of the radiation feeder line. The antenna grounding layer is arranged on the substrate and is positioned on one side of the radiation body, the antenna grounding layer is provided with a second feeder line position, and the second feeder line position is correspondingly coupled with the first feeder line position. By deriving the intermediate-frequency radiation part and the high-frequency radiation part which can receive 5G signals from the radiation feeder line, the antenna structure can simultaneously transmit the existing 4G LTE signals and the 5G signals which are gradually used online, and the application range of the micro base station antenna is enlarged.

Description

Antenna structure

Technical Field

This application relates to antenna communication's technical field, especially relates to a can have full frequency channel ultra wide band antenna structure of LTE frequency channel and 5G frequency channel concurrently.

Background

For the technology of wireless communication, an antenna is a structure for transmitting and receiving signals. As the fifth generation communication technology matures, the fifth generation communication equipment is built in the future, and therefore, the conventional antenna structure for the fourth generation communication cannot meet the requirement for transmitting the middle-high frequency band signals of the fifth generation communication technology. In addition, when equipment of the fifth generation communication technology comes online, it is desirable that the antenna of the existing micro base station can transmit LTE and 5G signals at the same time.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an antenna structure, has increased the radiation portion that can receive the different frequency channels of 5G communication, can receive or launch the signal of current receiving and dispatching LTE frequency channel and 5G frequency channel simultaneously.

In order to solve the technical problem, the present application is implemented as follows:

there is provided an antenna structure comprising: the antenna comprises a substrate, an antenna radiation layer and an antenna grounding layer. The antenna radiation layer is arranged on the substrate and comprises a radiation body and a radiation feeder line, the radiation feeder line is connected with the radiation body and extends along a first direction, the radiation feeder line is provided with a low-frequency radiation part, a medium-frequency radiation part, a high-frequency radiation part and a first feeder line position, the low-frequency radiation part, the medium-frequency radiation part, the high-frequency radiation part and the first feeder line position are arranged along the radiation body in sequence along the first direction, and the first feeder line position is located at one end, far away from the radiation body, of the radiation feeder line. The antenna grounding layer is arranged on the substrate and is positioned on one side of the radiation body, the antenna grounding layer is provided with a second feeder line position, and the second feeder line position is correspondingly coupled with the first feeder line position.

In the embodiment of the application, except for the original antenna body for receiving and sending the LTE signal, the low-frequency radiation part, the intermediate-frequency radiation part and the high-frequency radiation part which can receive the 5G signal are derived from the part of the radiation feeder, so that the antenna structure of the application can simultaneously receive or transmit the existing 4G LTE signal and the existing 5G signal, and the application range of the micro base station antenna is expanded.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic diagram of a first surface of an antenna structure according to an embodiment of the present application:

fig. 2 is a schematic diagram of a second surface of the antenna structure of fig. 1;

FIG. 3 is a schematic standing wave diagram of an antenna structure according to an embodiment of the present application;

FIG. 4 is an antenna pattern at theta 90 degrees for an antenna structure according to an embodiment of the present application;

FIG. 5 is an antenna pattern at phi 90 for an antenna structure according to an embodiment of the present application;

fig. 6 shows antenna patterns of an antenna structure according to an embodiment of the present application at phi 0 degrees.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Please refer to fig. 1 and fig. 2, which are schematic diagrams of a first surface of an antenna structure according to an embodiment of the present application and a second surface of the antenna structure according to an embodiment of the present application; as shown, the present embodiment provides an antenna structure 100, which includes: a substrate 10, an antenna radiation layer 20 and an antenna ground layer 30. The substrate 10 includes a first surface 11 and a second surface 12, and the first surface 11 is disposed opposite to the second surface 12. The antenna radiation layer 20 and the antenna ground layer 30 are disposed on the first surface 11, but are not limited thereto. In an embodiment, the antenna radiation layer 20 and the antenna ground layer 30 may be disposed on the second surface 12 or disposed on the first surface 11 and the second surface 12, respectively. In an embodiment, the antenna structure 100 further comprises a reflective layer 40, the reflective layer 40 being disposed on the second surface 12. In the present embodiment, the antenna radiation layer 20, the antenna ground layer 30, and the reflection layer 40 are all copper foils formed on the substrate 10.

The antenna radiation layer 20 includes a radiation feed line 21 and a radiation body 22. The radiation feed line 21 is connected to the radiation body 22 and extends in the first direction L1. The radiation feed line 21 has a low-frequency radiation portion 211, a medium-frequency radiation portion 212, a high-frequency radiation portion 213, and a first feed line position 214. The low frequency radiation portion 211, the intermediate frequency radiation portion 212, the high frequency radiation portion 213, and the first feed line 214 are arranged in order along the first direction L1 from one side of the radiation body 22, and the first feed line 214 is located at one end of the radiation feed line 21 away from the radiation body 22. I.e. the low frequency radiating portion 211 is closest to the radiating body 22 and the first feed line 214 is furthest from the radiating body 22. In other words, the distance between the low frequency radiating portion 211 and the first feed line 214 is the largest, the distance between the intermediate frequency radiating portion 212 and the first feed line 214 is the next largest, and the distance between the high frequency radiating portion 213 and the first feed line 214 is the smallest. The antenna ground layer 30 is located at one side of the radiating body 22, the antenna ground layer 30 has a second feed line bit 31, and the second feed line bit 31 is correspondingly coupled to the first feed line bit 214.

In the present embodiment, the low frequency radiation portion 211 includes a low frequency extension 2111 extending along a second direction L2 orthogonal to the first direction L1, the middle frequency radiation portion 212 includes a middle frequency extension 2121 extending along the second direction L2, and the high frequency radiation portion 213 includes a high frequency extension 2131 extending along the second direction L2, wherein the low frequency extension 2111, the middle frequency extension 2121 and the high frequency extension 2131 are sequentially spaced apart along the first direction L1 and sequentially distant from the radiation body 22. In the present embodiment, the low-frequency extension 2111, the intermediate-frequency extension 2121, and the high-frequency extension 2131 extend integrally from the radiation feed line 21. The radiation length formed between the radiation body 22 and the first feed line 214 is the largest, the radiation length formed between the low frequency extension 2111 and the first feed line 214 (i.e., the overall length of the low frequency radiation portion 211) is the second, the radiation length formed between the frequency extension 2121 and the first feed line 214 (i.e., the overall length of the intermediate frequency radiation portion 212) is the second, and the radiation length formed between the high frequency extension 2131 and the first feed line 214 (i.e., the overall length of the high frequency radiation portion 213) is the smallest, so as to receive or transmit signals of different frequency bands of low, medium and high frequencies of LTE and 5G. The length and width of the high frequency radiation part 213 are calculated from the center frequency point of the low frequency radiation part 211. In addition, the high-frequency extension 2131 is widened relative to the radiation feed line 21, so that the radiation area can be enlarged, and the radiation efficiency can be improved.

For example, the frequency band of the LTE signal of 4G can be effectively received and transmitted by the radiation structure formed by the radiation body 22 and the radiation feeder 21, the frequency band of the LTE signal of 5G can be effectively received and transmitted by the low-frequency radiation portion 211, the frequency band of the intermediate-frequency radiation portion 212, and the frequency band of the high-frequency radiation portion 213, respectively. In the present embodiment, the frequency band of the intermediate frequency radiation section 212 is 3.6 to 3.9GHz, and the radiation frequency band of the high frequency radiation section 213 is 5.15 to 5.925 GHz. By deriving the intermediate frequency radiation part 212 and the high frequency radiation part 213 capable of receiving 5G signals from the radiation feeder 21, the antenna structure 100 of the present application can simultaneously receive or transmit existing 4G LTE signals and 5G signals gradually used online, thereby increasing the application range of the micro base station antenna.

In one embodiment, the first feed line bit 214 and the second feed line bit 31 of the antenna ground layer 30 have a spacing therebetween. The antenna ground layer 30 has a feeder notch 32, and the feeder notch 32 is elongated and extends inward into the antenna ground layer 30, so that the antenna ground layer 30 has an inverted U-shape, and the feeder notch 32 is an inverted U-shaped opening (when viewed from the direction of fig. 1, the antenna ground layer 30 as a whole has a U-shaped structure rotated 90 degrees counterclockwise, and the opening faces the left direction in the drawing). One side of the antenna ground plane 30 is adjacent the radiating body 22 and the radiating feed line 21 extends into the feed line aperture 32. In particular, the first feed line location 214 is disposed within the feed line notch 32, and the low frequency extension 2111, the mid frequency extension 2121, and the high frequency extension 2131 are disposed outside of the feed line notch 32. The antenna ground layer 30 has an inverted U-shaped structure, so that currents are reversed and offset, and the out-of-roundness of the antenna is improved. And the radiating feed line 21 extends into the feed line notch 32.

The antenna ground layer 30 further includes a first ground portion 33 and a second ground portion 34, the first ground portion 33 is connected to the second ground portion 34 through a second feed line 31, the feed line notch 32 is located between the first ground portion 33 and the second ground portion 34, and the first ground portion 33 and the second ground portion 34 are located on both sides of the radiation feed line 21. Both one end of the first ground portion 33 and one end of the second ground portion 34 extend in the first direction L1 in a direction away from the first feed position 214 beyond the second feed position 31, and the length of the first ground portion 33 is smaller than the length of the second ground portion 34. The substrate 10 also has a notch 13, the notch 13 extends from one side of the substrate 10 to be close to the second feed line 31, and the first ground portion 33 and the second ground portion 34 are respectively disposed at two opposite sides close to the notch 13.

In the first direction L1, the length of the antenna ground layer 30 is smaller than the length of the low-frequency radiation portion 211 and larger than the length of the high-frequency radiation portion 213. Specifically, the length of the first ground portion 33 extending from the second feed line 31 in the first direction L1 toward the radiation main body 22 is shorter than the length of the high-frequency radiation portion 213, and the length of the second ground portion 34 extending from the second feed line 31 in the first direction L1 toward the radiation main body 22 is longer than the length of the high-frequency radiation portion 213 and shorter than the length of the low-frequency radiation portion 211. The length of the first ground portion 33 extending from the second feed position 31 in the first direction L1 away from the radiating body 22 is smaller than the length of the second ground portion 34 extending from the second feed position 31 in the first direction L1 away from the radiating body 22. In the present embodiment, the second ground portion 34 is close to the radiation body 22 with respect to the first ground portion 33. In the first direction L1, the low frequency extension 2111, the middle frequency extension 2121, and the high frequency extension 2131 are located between the first ground connection portion 33 and the radiation body 22; the middle-frequency extension 2121 and the high-frequency extension 2131 overlap the second ground portion 34 on a projection plane along the second direction L2, and the low-frequency extension 2111 and the radiation body 22 do not overlap the second ground portion 34 on a projection plane along the second direction L2. The first ground portion 33 has a first hollow area 35, the second ground portion 34 has a second hollow area 36, and the first hollow area 35 corresponds to the second hollow area 36. The first and second hollow-out

regions

35 and 36 are coupled in the antenna ground layer 30. Generally, the ground length of the antenna ground layer 30 corresponds to 1/4 of the low frequency wavelength, where the low frequency wavelength is the wavelength of the LTE frequency band corresponding to the radiation body 22. Since the first and second hollow-out

regions

35 and 36 can make the ground of the antenna ground layer 30 present in a loop manner, the length of the ground is the loop length, and the loop length corresponds to 1/4 of the low-frequency wavelength, so that the overall size of the antenna can be reduced. In an embodiment, in the first direction L1, the length of the first hollow area 35 or the second hollow area 36 is less than 1/4 of the low frequency wavelength. In an embodiment, in the first direction L1, the lengths of the first and second

hollow areas

35 and 36 are smaller than the length of the high-frequency radiation portion 213. In an embodiment, the first and second hollow-out

regions

35 and 36 extend from a side close to the second feed line 31 in the first direction L1 toward the high-frequency radiation portion 213. In the first direction L1, the first hollow area 35 and the high-frequency radiation portion 213 are separated by a portion of the first ground portion 33, and the second hollow area 36 and the high-frequency radiation portion 213 are separated by a portion of the second ground portion 34.

The antenna structure 100 of the present application also includes a low frequency isolation strip 50. The low frequency isolation strip 50 is disposed on the first surface 11 of the substrate 10 and is close to the antenna ground layer 30 relative to the radiation body 22, and the length of the low frequency isolation strip 50 is 1/4 to 1/2 of the wavelength of the electromagnetic wave corresponding to the frequency band that can be transmitted and received by the low frequency radiation portion 211 and/or the radiation body 22, but not limited thereto. In the present embodiment, the number of the low frequency isolation bars 50 is two, and the two low frequency isolation bars 50 are respectively disposed adjacent to two opposite sides of the antenna ground layer 30 and extend along the first direction L1. In detail, the two low-frequency isolation bars 50 correspond to the first ground portion 33 and the second ground portion 34, respectively. The low frequency isolation bars 50 can conduct low frequency noise out to increase the isolation between the low frequency portions to meet the isolation requirement.

The antenna structure 100 of the present application further includes a high-frequency isolation strip 60, the high-frequency isolation strip 60 is disposed on the first surface 11 of the substrate 10 and is disposed close to the radiation body 22 with respect to the antenna ground layer 30, and the length of the high-frequency isolation strip 60 is 1/4 to 1/2 of the wavelength of the electromagnetic wave corresponding to the frequency band that can be transmitted and received by the high-frequency radiation portion 213 and/or the intermediate-frequency radiation portion 212, but is not limited thereto. The high frequency isolation bar 60 is used to guide out the 5G noise to prevent other 5G signals in the communication system from interfering.

Referring to fig. 3 to 6, which are schematic standing wave diagrams of the antenna structure of the embodiment, an antenna pattern of the antenna structure of the embodiment at theta 90 degrees, an antenna pattern of the antenna structure of the embodiment at phi 90 degrees, and an antenna pattern of the antenna structure of the embodiment at phi 0 degrees, as shown in the figure, the antenna structure has a low standing wave ratio in several bands of low frequency and medium and high frequency, and the isotropy of the antenna signal is good.

To sum up, this application provides a biography antenna structure, derives low frequency radiation portion, intermediate frequency radiation portion and the high frequency radiation portion that can receive 5G signal through the part at the radiation feeder for the antenna structure of this application can receive or launch current 4G's LTE signal and the 5G signal that gradually goes on the line and use simultaneously, increases little base station antenna's range of application. In addition, the antenna ground layer is provided with the feeder line notch, so that the radiation feeder line extends into the antenna ground layer through the feeder line notch to be coupled, the length of the antenna can be reduced, and other low-frequency and high-frequency signals in the communication device can be isolated through the low-frequency isolating strip and the high-frequency isolating strip, so that the interference can be prevented.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An antenna structure, comprising:

a substrate;

the antenna radiation layer is arranged on the substrate and comprises a radiation body and a radiation feeder line, the radiation feeder line is connected with the radiation body and extends along a first direction, the radiation feeder line is provided with a low-frequency radiation part, a medium-frequency radiation part, a high-frequency radiation part and a first feeder line position, the low-frequency radiation part, the medium-frequency radiation part, the high-frequency radiation part and the first feeder line position are sequentially arranged along the first direction from the radiation body, and the first feeder line position is located at one end, far away from the radiation body, of the radiation feeder line;

the antenna grounding layer is arranged on the substrate and is positioned on one side of the radiation body, the antenna grounding layer is provided with a second feed line position, and the second feed line position is correspondingly coupled with the first feed line position.

2. The antenna structure according to claim 1, wherein the low frequency radiating portion includes a low frequency extension extending in a second direction perpendicular to the first direction, the mid frequency radiating portion includes a mid frequency extension extending in the second direction and the high frequency radiating portion includes a high frequency extension extending in the second direction, wherein the low frequency extension, the mid frequency extension and the high frequency extension are sequentially spaced apart in the first direction and sequentially distant from the radiating body.

3. The antenna structure according to claim 1, wherein the frequency band of the intermediate frequency radiation section is 3.6 to 3.9GHz, and the radiation frequency band of the high frequency radiation section is 5.15 to 5.925 GHz.

4. The antenna structure according to claim 1, wherein the length and width of the high-frequency radiating portion are calculated from the center frequency point of the low-frequency radiating portion.

5. The antenna structure of claim 1, wherein the antenna ground layer has a feed line aperture, the antenna ground layer being adjacent the radiating body, the radiating feed line extending into the feed line aperture.

6. The antenna structure according to claim 5, wherein a length of the antenna ground layer in the first direction is smaller than a length of the low-frequency radiation section and larger than a length of the high-frequency radiation section.

7. The antenna structure of claim 5, wherein the antenna ground plane is an inverted U-shape.

8. The antenna structure of claim 5, wherein the antenna ground layer further comprises a first ground portion and a second ground portion, the first ground portion and the second ground portion connected by the second feed line location, the feed line gap being between the first ground portion and the second ground portion, the first ground portion and the second ground portion being on opposite sides of the radiating feed line.

9. The antenna structure of claim 8, wherein the first ground portion has a first hollowed-out area, the second ground portion has a second hollowed-out area, and the first hollowed-out area corresponds to the second hollowed-out area.

10. The antenna structure according to claim 9, wherein a length of the first and second hollow-out areas is smaller than a length of the high-frequency radiation section in the first direction.

11. The antenna structure according to claim 1, further comprising a low-frequency isolation strip, wherein the low-frequency isolation strip is disposed on a side of the substrate close to the antenna ground layer with respect to the radiation body, and a length of the low-frequency isolation strip is 1/4 to 1/2 of a wavelength of an electromagnetic wave corresponding to a frequency band of the low-frequency radiation section.

12. The antenna structure of claim 11, wherein the number of the low frequency isolation strips is two, and the two low frequency isolation strips are respectively disposed adjacent to opposite sides of the antenna ground layer.

13. The antenna structure according to claim 11, further comprising a high-frequency spacer provided on the substrate and disposed close to the radiation body with respect to the antenna ground layer, the length of the high-frequency spacer being 1/4 to 1/2 of the wavelength of the electromagnetic wave corresponding to the frequency band of the high-frequency radiation section.

14. The antenna structure of claim 1, further comprising a reflective layer, the substrate having a first surface and a second surface disposed opposite the first surface, the antenna radiating layer and the antenna ground layer being disposed on the first surface of the substrate, the reflective layer being disposed on the second surface of the substrate.