CN112310642A - Antenna assembly and mobile terminal - Google Patents
Antenna assembly and mobile terminal Download PDFInfo
- Publication number
- CN112310642A CN112310642A CN202010915298.4A CN202010915298A CN112310642A CN 112310642 A CN112310642 A CN 112310642A CN 202010915298 A CN202010915298 A CN 202010915298A CN 112310642 A CN112310642 A CN 112310642A
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- antenna
- antenna unit
- capacitor
- ground
- antenna element
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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
-
- 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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Support Of Aerials (AREA)
Abstract
The invention provides an antenna assembly and a mobile terminal. The antenna assembly includes a first antenna element, a second antenna element, and a wiring board. The circuit board is provided with an antenna ground and a radio frequency feed source; the first antenna unit and the second antenna unit are arranged at intervals, and the first antenna unit and the second antenna unit are electrically connected with the antenna ground and the radio frequency feed source. Above-mentioned antenna module, form on the antenna ground and accept the logical groove of walking the line, the line is connected with the cell wall that leads to the groove through first electric capacity and second electric capacity to walk the line and be connected with antenna ground electricity, form defect ground structure, this defect ground structure is located between the first antenna element and the second antenna element that the interval set up, defect ground structure has changed the distributed inductance and the distributed capacitance on antenna ground, make first antenna element and second antenna element obtain band elimination and slow wave characteristic, improved the isolation between first antenna element and the second antenna element.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of communication, in particular to an antenna assembly and a mobile terminal.
[ background of the invention ]
The existing 5G mobile terminal has a large number of antennas, the antennas are seriously coupled with each other, especially the isolation between two antennas which are close to each other and have the same working frequency is poor, and the use of the 5G mobile terminal is seriously influenced.
Therefore, it is desirable to provide an antenna assembly and a mobile terminal.
[ summary of the invention ]
The invention aims to provide an antenna assembly and a mobile terminal, and aims to solve the technical problem of poor isolation between two antennas which are close in distance and have the same working frequency.
In order to solve the above technical problems, the first technical solution of the present invention is as follows:
an antenna assembly includes a first antenna element, a second antenna element, and a wiring board;
the circuit board is provided with an antenna ground and a radio frequency feed source;
the first antenna unit and the second antenna unit are arranged at intervals, and are electrically connected with the antenna ground and the radio frequency feed source;
a through groove is formed in the antenna, the through groove is located between the first antenna unit and the second antenna unit, a wiring is accommodated in the through groove, and the wiring and the groove wall of the through groove are arranged at intervals;
the antenna assembly further comprises a first capacitor and a second capacitor, the trace is connected with the groove wall through the first capacitor and the second capacitor respectively so as to electrically connect the trace with the antenna, the first capacitor is located on one side of the trace close to the first antenna unit, and the second capacitor is located on one side of the trace close to the second antenna unit.
In some embodiments of the antenna assembly, the first antenna element and the second antenna element are symmetrically disposed, the trace is located on an axis of symmetry of the first antenna element and the second antenna element, and the first capacitance and the second capacitance are symmetrically disposed about the axis of symmetry.
In some embodiments of the antenna assembly, the trace is in the shape of an axisymmetric figure about the axis of symmetry.
In some embodiments of the antenna assembly, the trace is provided with a first end and a second end, the trace is electrically connected to the first capacitor through the first end, the first end is the closest end to the first antenna element, the trace is electrically connected to the second capacitor through the second end, and the second end is the closest end to the second antenna element.
In some embodiments of the antenna assembly, the trace is T-shaped.
In some embodiments of the antenna assembly, the through slot has a T-shape, and the trace is disposed at an equal distance from the slot wall.
In some embodiments of the antenna assembly, the first antenna element includes a first radiator and a first connector electrically connected to the antenna ground and the radio frequency feed, the first connector extending outward of the first side of the circuit board and electrically connected to the first radiator;
the second antenna unit comprises a second radiator and a second connector electrically connected with the antenna ground and the radio frequency feed source, and the second connector extends to the outer side of the first side and is electrically connected with the second radiator.
In some embodiments of the antenna assembly, the notch of the through-slot is formed at the first side, the trace includes a first branch and a second branch, the first branch extends along a direction perpendicular to the symmetry axis, the first end and the second end are respectively located at two ends of the first branch, the second branch extends along the symmetry axis, one end of the second branch is connected with the first branch, and the other end of the second branch is located at the notch.
In some embodiments of the antenna assembly, a distance between the first antenna element and the second antenna element is less than 6mm, an operating frequency of the first antenna element is 3.4 GHz-3.6 GHz and 4.8 GHz-5 GHz, and an operating frequency of the second antenna element is 3.4 GHz-3.6 GHz and 4.8 GHz-5 GHz.
In order to solve the above technical problems, the second technical solution of the present invention is as follows:
a mobile terminal comprising an antenna assembly as described above, the first and second antenna elements each being located to the side of the mobile terminal.
The invention has the beneficial effects that:
above-mentioned antenna module, form on the antenna ground and accept the logical groove of walking the line, the line is connected with the cell wall that leads to the groove through first electric capacity and second electric capacity to walk the line and be connected with antenna ground electricity, form defect ground structure, this defect ground structure is located between the first antenna element and the second antenna element that the interval set up, defect ground structure has changed the distributed inductance and the distributed capacitance on antenna ground, make first antenna element and second antenna element obtain band elimination and slow wave characteristic, improved the isolation between first antenna element and the second antenna element.
[ description of the drawings ]
FIG. 1 is a schematic structural diagram of an antenna assembly of the present invention;
FIG. 2 is an enlarged view of part A of FIG. 1;
FIG. 3 is a graph showing a comparison of the performance of the antenna assembly of the present invention with that of a conventional antenna assembly;
FIG. 4 is a current distribution diagram of an antenna assembly of the present invention at 4.9 GHz;
fig. 5 is a schematic diagram of the position of an antenna assembly in the mobile terminal according to the invention;
fig. 6 is an enlarged schematic view of part B in fig. 5.
[ detailed description ] embodiments
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1 to 6, an antenna assembly 100 according to the present invention will now be described. The antenna assembly 100 provided by the embodiment of the invention is used for a mobile terminal. The antenna assembly 100 includes a first antenna element 110, a second antenna element 120, and a wiring board 130. In this embodiment, the operating frequencies of the first antenna unit 110 are 3.4GHz to 3.6GHz and 4.8GHz to 5GHz, and the operating frequencies of the second antenna unit 120 are 3.4GHz to 3.6GHz and 4.8GHz to 5 GHz. I.e. the first antenna element 110 and the second antenna element 120 have the same operating frequency. It is understood that in other embodiments, the operating frequency of the first antenna element 110 and the operating frequency of the second antenna element 120 may not be completely the same, and may be coincident. In this embodiment, the first antenna unit 110 and the second antenna unit 120 are symmetrically disposed at an interval, and the interval distance is 5.8mm, that is, the first antenna unit 110 and the second antenna unit 120 have the same structure and are disposed in mirror symmetry. It is understood that in other embodiments, the structures of the first antenna element 110 and the second antenna element 120 may be different.
Further, in the present embodiment, the circuit board 130 is provided with an antenna ground and a radio frequency feed source. The first antenna element 110 and the second antenna element 120 are both electrically connected to an antenna ground and a radio frequency feed. The circuit board 130 is a PCB 130, and it is understood that in other embodiments, the circuit board 130 may also be an FPC board or a rigid-flex board. In this embodiment, the circuit board 130 further includes a first grounding point, a second grounding point, a first feeding point and a second feeding point. Further, the first antenna element 110 is electrically connected to the antenna ground through a first ground point, the first antenna element 110 is electrically connected to the radio frequency feed source through a first feed point, the second antenna element 120 is electrically connected to the antenna ground through a second ground point, and the second antenna element 120 is electrically connected to the radio frequency feed source through a second feed point. Specifically, the first antenna element 110 is electrically connected to a first ground point through the first connection post 140. The first antenna element 110 is electrically connected to the first feeding point through the second connection post 150. The second antenna unit 120 is electrically connected to the second ground point through a third connection pin 160. The second antenna element 120 is electrically connected to the second feeding point through a fourth connection post 170.
Further, the first antenna unit 110 includes a first radiator 111 and a first connector 112 electrically connected to the antenna ground and the radio frequency feed, and the first connector 112 extends to the outside of the first side 131 of the circuit board 130 and is electrically connected to the first radiator 111, so that the first radiator 111 is suspended outside the first side 131 to facilitate radiation propagation. The first connector 112 is electrically connected to the antenna ground and the radio frequency feed through the first connection post 140 and the second connection post 150.
The second antenna unit 120 includes a second radiator 121 and a second connector 122 electrically connected to the antenna ground and the radio frequency feed, and the second connector 122 extends to the outside of the first side 131 and is electrically connected to the second radiator 121, so that the second radiator 121 is suspended outside the first side 131 to facilitate radiation propagation. The third connecting column 160 and the fourth connecting column 170 are both located on the second connecting body 122.
In this embodiment, the first antenna unit 110 and the second antenna unit 120 are disposed on the plastic support and spaced apart from the circuit board 130, and it is understood that in other embodiments, the first antenna unit 110 and the second antenna unit 120 may be formed on the plastic support by a laser direct molding technique, or may be attached to the plastic support by a flexible circuit board.
Further, a through groove 132 is disposed on the antenna, the through groove 132 is located between the first antenna unit 110 and the second antenna unit 120, the through groove 132 receives the trace 133, and the trace 133 is spaced from a groove wall of the through groove 132. Further, the antenna assembly 100 further includes a first capacitor 134 and a second capacitor 135, the trace 133 is connected to the slot wall through the first capacitor 134 and the second capacitor 135, respectively, so as to electrically connect the trace 133 to the antenna, the first capacitor 134 is located on a side of the trace 133 close to the first antenna unit 110, and the second capacitor 135 is located on a side of the trace 133 close to the second antenna unit 120. In this embodiment, the trace 133 is made of a copper wire or a linear copper foil. It is understood that in other embodiments, the trace 133 may be made of other conductive materials.
In the antenna assembly 100, the through groove 132 accommodating the trace 133 is formed on the antenna ground, the trace 133 is connected to the groove wall of the through groove 132 through the first capacitor 134 and the second capacitor 135, so as to electrically connect the trace 133 with the antenna, and a defected ground structure is formed, the defected ground structure is located between the first antenna unit 110 and the second antenna unit 120 which are symmetrically and alternately arranged, and the defected ground structure changes the distributed inductance and the distributed capacitance of the antenna ground, so that the first antenna unit 110 and the second antenna unit 120 obtain band rejection and slow wave characteristics, and the isolation between the first antenna unit 110 and the second antenna unit 120 is improved.
Further, the trace 133 is located on the symmetry axis of the first antenna element 110 and the second antenna element 120, and the first capacitor 134 and the second capacitor 135 are symmetrically disposed about the symmetry axis. The trace 133 is axisymmetrically shaped about the axis of symmetry. Specifically, the trace 133 may be circular, triangular, quadrilateral, cross-shaped, or T-shaped. In this embodiment, the trace 133 is T-shaped. The through groove 132 is T-shaped, and the trace 133 is disposed at equal intervals with the groove wall. It is understood that in other embodiments, the shape of the through slot 132 does not conform to the shape of the trace 133. For example, for the T-shaped trace 133, the through groove 132 may also be triangular or quadrilateral, so as to ensure that the trace 133 is spaced from the groove wall.
Further, in order to further increase the isolation between the first antenna element 110 and the second antenna element 120, the first capacitor 134 is required to be located at an end of the trace 133 closest to the first antenna element 110. Similarly, the second capacitor 135 is required to be located at the end of the trace 133 closest to the second antenna unit 120. Based on this, in the present embodiment, the trace 133 has a first end and a second end. Specifically, the trace 133 includes a first sub-portion 1331 and a second sub-portion 1332, the first sub-portion 1331 extends along a direction perpendicular to the symmetry axis, and the first end and the second end are respectively located at two ends of the first sub-portion 1331. The trace 133 is electrically connected to the first capacitor 134 through a first end, the first end being the nearest end from the first antenna unit 110, the trace 133 is electrically connected to the second capacitor 135 through a second end, the second end being the nearest end from the second antenna unit 120.
Further, the notch of the through groove 132 is formed at the first side 131, and the second section 1332 extends in the symmetry axis direction. One end of the second division 1332 is connected to the first division 1331, and the other end of the second division 1332 is located at the notch, so that the antenna ground portion between the first ground point and the first side 131 and the antenna ground portion between the second ground point and the first side 131 are completely separated by the through groove 132, further improving the isolation between the first antenna unit 110 and the second antenna unit 120. Fig. 3 is a graph showing a comparison between the performance of the antenna assembly 100 of the present invention and that of a conventional antenna assembly. In the figure, curve a is the reflection coefficient of the first antenna element 110 with the defected ground structure, and curve b is the reflection coefficient of the first antenna element 110 without the defected ground structure. Curve c is the transmission coefficient (characteristic isolation) between the first antenna element 110 and the second antenna element 120 when the antenna has a defected ground structure, and curve d is the transmission coefficient (characteristic isolation) between the first antenna element 110 and the second antenna element 120 when the antenna has no defected ground structure. Curve e is the reflection coefficient of the second antenna unit 120 with the defected ground structure, and curve f is the reflection coefficient of the second antenna unit 120 without the defected ground structure. As can be seen from the figure, in the operating frequency, especially in the frequency band of 4.8GHz to 5GHz, the isolation between the first antenna unit 110 and the second antenna unit 120 is obviously improved, from-9 dB to about-16 dB, and is improved by nearly 7 dB. Fig. 4 is a current distribution diagram of the antenna assembly 100 of the present invention at 4.9 GHz. As can be seen from the figure, after the defect ground structure of this embodiment is added, a relatively strong current is distributed in the vicinity of the defect ground structure at 4.9 GHz. Distributed inductance and distributed capacitance near the defected ground structure enable the first antenna unit 110 and the second antenna unit 120 to obtain band stop and slow wave characteristics, and isolation between the first antenna unit 110 and the second antenna unit 120 is improved.
The invention further provides a mobile terminal 10, and the mobile terminal 10 can be a mobile phone, a notebook computer, a tablet computer, a player, an earphone, an intelligent watch or intelligent glasses, and the like. As shown in fig. 5, the mobile terminal 10 includes the antenna assembly 100 of the above embodiments, and the first antenna element 110 and the second antenna element 120 are both located on the side 11 of the mobile terminal 10.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An antenna assembly comprising a first antenna element, a second antenna element, and a wiring board;
the circuit board is provided with an antenna ground and a radio frequency feed source;
the first antenna unit and the second antenna unit are arranged at intervals, and are electrically connected with the antenna ground and the radio frequency feed source;
a through groove is formed in the antenna, the through groove is located between the first antenna unit and the second antenna unit, a wiring is accommodated in the through groove, and the wiring and the groove wall of the through groove are arranged at intervals;
the antenna assembly further comprises a first capacitor and a second capacitor, the trace is connected with the groove wall through the first capacitor and the second capacitor respectively so as to electrically connect the trace with the antenna, the first capacitor is located on one side of the trace close to the first antenna unit, and the second capacitor is located on one side of the trace close to the second antenna unit.
2. The antenna assembly of claim 1, wherein: the first antenna unit and the second antenna unit are symmetrically arranged, the routing is located on a symmetry axis of the first antenna unit and the second antenna unit, and the first capacitor and the second capacitor are symmetrically arranged relative to the symmetry axis.
3. The antenna assembly of claim 2, wherein: the routing is in an axisymmetric figure shape relative to the symmetry axis.
4. The antenna assembly of claim 3, wherein: the wiring is provided with a first end and a second end, the wiring is electrically connected with the first capacitor through the first end, the first end is the nearest end away from the first antenna unit, the wiring is electrically connected with the second capacitor through the second end, and the second end is the nearest end away from the second antenna unit.
5. The antenna assembly of claim 4, wherein: the routing is T-shaped.
6. The antenna assembly of claim 5, wherein: the through groove is T-shaped, and the routing and the groove wall are arranged at equal intervals.
7. The antenna assembly of claim 6, wherein: the first antenna unit comprises a first radiator and a first connecting body electrically connected with the antenna ground and the radio frequency feed source, and the first connecting body extends to the outer side of the first side of the circuit board and is electrically connected with the first radiator;
the second antenna unit comprises a second radiator and a second connector electrically connected with the antenna ground and the radio frequency feed source, and the second connector extends to the outer side of the first side and is electrically connected with the second radiator.
8. The antenna assembly of claim 7, wherein: the notch of logical groove is formed in first side, it includes first subsection and second subsection to walk the line, first subsection is along the perpendicular to the symmetry axis direction extends, first end with the second end is located respectively the both ends of first subsection, the second subsection is followed the symmetry axis direction extends, the one end of second subsection with first subsection is connected, the other end of second subsection is located the notch.
9. The antenna assembly of claim 8, wherein: the distance between the first antenna unit and the second antenna unit is less than 6mm, the working frequency of the first antenna unit is 3.4 GHz-3.6 GHz and 4.8 GHz-5 GHz, and the working frequency of the second antenna unit is 3.4 GHz-3.6 GHz and 4.8 GHz-5 GHz.
10. A mobile terminal comprising an antenna assembly as claimed in any one of claims 1 to 9, wherein the first antenna element and the second antenna element are located on the sides of the mobile terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010915298.4A CN112310642A (en) | 2020-09-03 | 2020-09-03 | Antenna assembly and mobile terminal |
| PCT/CN2020/118219 WO2022047874A1 (en) | 2020-09-03 | 2020-09-28 | Antenna assembly and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010915298.4A CN112310642A (en) | 2020-09-03 | 2020-09-03 | Antenna assembly and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112310642A true CN112310642A (en) | 2021-02-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010915298.4A Pending CN112310642A (en) | 2020-09-03 | 2020-09-03 | Antenna assembly and mobile terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112310642A (en) |
| WO (1) | WO2022047874A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090009400A1 (en) * | 2007-07-03 | 2009-01-08 | Samsung Electronics Co., Ltd. | Miniaturized multiple input multiple output (mimo) antenna |
| US20130120201A1 (en) * | 2011-11-14 | 2013-05-16 | Samsung Electronics Co. Ltd. | Electronic apparatus for isolating signal generation device |
| CN104170164A (en) * | 2012-03-13 | 2014-11-26 | 微软公司 | Antenna isolation using a tuned ground plane notch |
| CN204375977U (en) * | 2015-01-16 | 2015-06-03 | 中兴通讯股份有限公司 | A kind of multi-input multi-output antenna system |
| CN205488548U (en) * | 2016-01-15 | 2016-08-17 | 昆山联滔电子有限公司 | Composite antenna |
| CN207459184U (en) * | 2017-07-10 | 2018-06-05 | 普尔思（苏州）无线通讯产品有限公司 | A kind of multiple-input and multiple-output mimo antenna |
| US20190074590A1 (en) * | 2017-09-04 | 2019-03-07 | Acer Incorporated | Mobile electronic device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI513104B (en) * | 2012-08-28 | 2015-12-11 | Compal Electronics Inc | Electronic device |
| CN104937774B (en) * | 2014-05-12 | 2017-07-14 | 华为技术有限公司 | A kind of antenna assembly and electronic equipment |
-
2020
- 2020-09-03 CN CN202010915298.4A patent/CN112310642A/en active Pending
- 2020-09-28 WO PCT/CN2020/118219 patent/WO2022047874A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090009400A1 (en) * | 2007-07-03 | 2009-01-08 | Samsung Electronics Co., Ltd. | Miniaturized multiple input multiple output (mimo) antenna |
| US20130120201A1 (en) * | 2011-11-14 | 2013-05-16 | Samsung Electronics Co. Ltd. | Electronic apparatus for isolating signal generation device |
| CN104170164A (en) * | 2012-03-13 | 2014-11-26 | 微软公司 | Antenna isolation using a tuned ground plane notch |
| CN204375977U (en) * | 2015-01-16 | 2015-06-03 | 中兴通讯股份有限公司 | A kind of multi-input multi-output antenna system |
| CN205488548U (en) * | 2016-01-15 | 2016-08-17 | 昆山联滔电子有限公司 | Composite antenna |
| CN207459184U (en) * | 2017-07-10 | 2018-06-05 | 普尔思（苏州）无线通讯产品有限公司 | A kind of multiple-input and multiple-output mimo antenna |
| US20190074590A1 (en) * | 2017-09-04 | 2019-03-07 | Acer Incorporated | Mobile electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022047874A1 (en) | 2022-03-10 |
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Application publication date: 20210202 |
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