CN107681272B - Dual-coupling antenna under extremely small headroom - Google Patents
Dual-coupling antenna under extremely small headroom Download PDFInfo
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- CN107681272B CN107681272B CN201711078822.1A CN201711078822A CN107681272B CN 107681272 B CN107681272 B CN 107681272B CN 201711078822 A CN201711078822 A CN 201711078822A CN 107681272 B CN107681272 B CN 107681272B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant 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
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
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Abstract
The invention provides a double-coupling antenna under extremely small clearance, which comprises a PCB and a metal frame positioned at one end of the PCB, wherein the metal frame is connected with a circuit area of the PCB through a first connecting position and a second connecting position respectively; and a first antenna branch and a second antenna branch are arranged on the PCB between the second connecting position and one side of the metal frame. According to the invention, electromagnetic coupling is formed between the branches connected with the feed and the grounded branches, resonance is generated, so that frequency coverage of GPS (1550 MHz-1620 MHz) and BT & WIFI (2400 MHz-2500 MHz) is realized, and meanwhile, frequency coverage of WIFI 5G (5150 MHz-5850 MHz) can be realized through resonance generated by the branches connected with the feed. Compared with the prior art, the invention realizes good performance in a non-clearance area, and is applicable to an antenna environment with severe environment and smaller clearance; the invention can realize independent tuning and has the advantages of smaller association and convenient tuning.
Description
Technical Field
The invention relates to an antenna, in particular to a double-coupling antenna under extremely small headroom.
Background
With the rapid development and popularization of all-metal backshell mobile phones and the improvement of the requirements of users on the large screen of the mobile phones, a plurality of mobile phone manufacturers present a design scheme of a full-screen mobile phone. The full-screen mobile phone is characterized in that the front face of the mobile phone is a screen, and four frame positions of the mobile phone are designed to be frame-free, so that the screen occupation ratio is close to 100%. However, the technology is limited in practice, and a mobile phone with a front screen of 100% cannot be achieved. The current full-screen mobile phone is a mobile phone with the screen ratio reaching more than 90% and ultra-narrow frame design.
The appearance of the mobile phone is greatly improved by the comprehensive screen mobile phone, the mobile phone looks more technological, and in addition, the larger screen can be accommodated in the same front area of the mobile phone body, so that the visual experience is remarkably improved. However, compared with a mobile phone with an all-metal rear shell, the mobile phone with the full screen has the advantages that the antenna environment is further severe, the antenna clearance is further compressed, and the design of the antenna faces greater challenges.
Disclosure of Invention
Therefore, the invention aims to provide a dual-coupling antenna which can be suitable for a full-screen mobile phone under a very small headroom.
The aim of the invention is achieved by the following technical scheme.
The double-coupling antenna with the extremely small clearance comprises a PCB (10) and a metal frame (20) positioned at one end of the PCB (10), wherein the metal frame (20) is connected with a circuit area of the PCB (10) through a first connecting position (11) and a second connecting position (12) respectively; a first antenna branch (13) and a second antenna branch (14) are arranged on the PCB (10) between the second connecting position (12) and one side of the metal frame (20); the first antenna branch (13) comprises a first parallel lead (131) and a second parallel lead (132), one end of the first parallel lead (131) is connected with one end of the second parallel lead (132) through a first connecting lead (133), the other end of the first parallel lead (131) is connected with one end of a second connecting lead (134), and the other end of the second connecting lead (134) is connected with a feeding point (15) of a circuit area of the PCB (10); the second antenna branch (14) comprises a third parallel lead (141) and a fourth parallel lead (142), the fourth parallel lead (142) is parallel to the second parallel lead (132), one end of the fourth parallel lead (142) is connected with one end of the third parallel lead (141) through a third connecting lead (143), and the other end of the third parallel lead (141) is connected with a feed point (16) of a circuit area of the PCB (10); wherein a current signal is fed from a feed point (15) into a first antenna branch (13) close to the metal frame (20) to create a coupling effect; the current signal in the first antenna branch (13) is correspondingly radiated into the metal frame (20), an electromagnetic effect is correspondingly generated, and the metal frame (20) returns to the PCB (10) after passing through the first connecting position (11) and the second connecting position (12).
Preferably, the metal frame (20) and the PCB (10) are fixed through a connecting piece (30), and the connecting piece (30) is a non-metal medium connecting piece.
Preferably, the distance between the metal frame (20) and the PCB (10) is between 1.0mm and 2.0 mm.
Preferably, the distance between the metal frame (20) and the PCB (10) is 1.5mm.
Preferably, the PCB board (10) is a double-layer board, and the substrate thereof is an FR4 board with epsilon=4.3 and delta=0.024.
The dual-coupling antenna under the extremely small clearance provided by the invention forms electromagnetic coupling between the branch connected with the feed and the grounded branch to generate resonance so as to realize frequency coverage of GPS (1550 MHz-1620 MHz) and BT & WIFI (2400 MHz-2500 MHz), and meanwhile, the resonance generated by the branch connected with the feed can realize frequency coverage of WIFI 5G (5150 MHz-5850 MHz). Compared with the prior art, the invention realizes good performance in a non-clearance area, and is applicable to an antenna environment with severe environment and smaller clearance; the invention can realize independent tuning and has the advantages of smaller association and convenient tuning.
Drawings
FIG. 1 is a schematic back view of a dual-coupling antenna of the present invention;
FIG. 2 is a schematic front view of a dual-coupling antenna of the present invention;
fig. 3 is a schematic structural diagram of a first antenna branch in the dual-coupling antenna of the present invention;
fig. 4 is a schematic structural diagram of a second antenna branch in the dual-coupling antenna of the present invention;
FIG. 5 is a graph of the S11 of the present invention;
FIG. 6 is a graph of the efficiency of the present invention.
The figure identifies the description: the PCB board 10, the first connection site 11, the second connection site 12, the first antenna branch 13, the first parallel lead 131, the second parallel lead 132, the first connection lead 133, the second connection lead 134, the second antenna branch 14, the third parallel lead 141, the fourth parallel lead 142, the third connection lead 143, the feed point 15, the feed point 16, the metal frame 20, the connector 30.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic back view of a dual-coupling antenna according to the present invention. The invention provides a double-coupling antenna with extremely small headroom, which comprises a PCB (printed circuit board) 10 and a metal frame 20.
PCB board 10 is a double layer board with a substrate of FR4 board with epsilon=4.3, delta=0.024. In this embodiment, the dimensions of the PCB board 10 are 140mm×71mm, and the dimensions of the simulation complete machine are 145mm×71mm×6mm.
A metal frame 20 is correspondingly arranged at one end of the PCB 10, and a gap is formed between the metal frame 20 and the PCB 10, wherein the distance between the metal frame and the PCB is 1.0 mm-2.0 mm.
The gap between the metal frame 20 and the PCB 10 is preferably 1.5mm, and in the back of the dual-coupling antenna of this embodiment, the metal frame 20 and the PCB 10 are correspondingly connected and fixed through the connecting piece 30.
The connector 30 in this embodiment is a nonmetallic media connector.
As shown in fig. 2, 3 and 4, in the present embodiment, the middle of the metal frame 20 is connected to the circuit area of the PCB 10 through a first connection location 11 and a second connection location 12, respectively, and a gap is formed between the first connection location 11 and the second connection location 12.
Wherein a first antenna branch 13 and a second antenna branch 14 are provided on the PCB board 10 between the second connection location 12 and one side of the metal frame 20. And the distances from the first antenna branch 13 and the second antenna branch 14 to the PCB board 10 are 3mm.
The first antenna branch 13 includes a first parallel lead 131 and a second parallel lead 132, one end of the first parallel lead 131 is connected to one end of the second parallel lead 132 through a first connection lead 133, the other end of the first parallel lead 131 is connected to one end of a second connection lead 134, and the other end of the second connection lead 134 is connected to the feeding point 15 (see fig. 3) of the circuit area of the PCB 10.
Wherein a current signal is fed from the feed point 15 into the first antenna branch 13 near the metal frame 20 to create a coupling effect; the current signal in the first antenna branch 13 is correspondingly radiated into the metal frame 20, and correspondingly generates an electromagnetic effect, and the metal frame 20 returns to the PCB 10 after passing through the first connection position 11 and the second connection position 12.
From this, the resonance generated by the first antenna branch 13 in this embodiment can realize the frequency coverage of WIFI 5G (5150 MHz-5850 MHz). By adjusting the shift of the tunable resonance of the first connection bit 11 and the second connection bit 12, it is possible to achieve frequency coverage of GPS (1570 MHz to 1620 MHz).
The second antenna branch 14 includes a third parallel lead 141 and a fourth parallel lead 142, wherein the fourth parallel lead 142 is parallel to the second parallel lead 132, and one end of the fourth parallel lead 142 is connected to one end of the third parallel lead 141 through a third connection lead 143, and the other end of the third parallel lead 141 is connected to the feed point 16 (see fig. 4) of the circuit area of the PCB board 10.
As with the first antenna branch 13, the second antenna branch 14 is closer to and parallel to the first antenna branch 13 (see the fourth parallel lead 142 and the second parallel lead 132 in detail), so that it also generates a coupling effect. While the length of the second antenna branch 14 may be tuned to the resonant frequency so as to achieve BT & WIFI (2400 MHz-2500 MHz) frequency coverage.
As shown in fig. 5 and 6, fig. 5 is a graph S11 of the present invention; FIG. 6 is a graph of the efficiency of the present invention. S11 is obtained through experimental simulation, and the return loss of the antenna in actual debugging meets the design requirement of less than-5 dB.
In summary, the dual-coupling antenna is suitable for the condition of extremely small clearance, and generates resonance by forming electromagnetic coupling between the branch joint connected with the feed and the two grounded branches, so as to realize frequency coverage of GPS (1550 MHz-1620 MHz) and BT & WIFI (2400 MHz-2500 MHz), and simultaneously, the branch joint connected with the feed generates resonance to realize frequency coverage of WIFI 5G (5150 MHz-5850 MHz).
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The double-coupling antenna with the extremely small clearance comprises a PCB (10) and a metal frame (20) positioned at one end of the PCB (10), and is characterized in that the metal frame (20) is connected with a circuit area of the PCB (10) through a first connecting position (11) and a second connecting position (12) respectively; a first antenna branch (13) and a second antenna branch (14) are arranged on the PCB (10) between the second connecting position (12) and one side of the metal frame (20); the first antenna branch (13) comprises a first parallel lead (131) and a second parallel lead (132), one end of the first parallel lead (131) is connected with one end of the second parallel lead (132) through a first connecting lead (133), the other end of the first parallel lead (131) is connected with one end of a second connecting lead (134), and the other end of the second connecting lead (134) is connected with a feeding point (15) of a circuit area of the PCB (10); the second antenna branch (14) comprises a third parallel lead (141) and a fourth parallel lead (142), the fourth parallel lead (142) is coupled with the second parallel lead (132) in parallel, one end of the fourth parallel lead (142) is connected with one end of the third parallel lead (141) through a third connecting lead (143), and the other end of the third parallel lead (141) is connected with a feed point (16) of a circuit area of the PCB (10); wherein a current signal is fed from a feed point (15) into a first antenna branch (13) close to the metal frame (20) to create a coupling effect; the current signal in the first antenna branch (13) is correspondingly radiated into the metal frame (20), an electromagnetic effect is correspondingly generated, and the metal frame (20) returns to the PCB (10) after passing through the first connecting position (11) and the second connecting position (12).
2. The dual-coupling antenna with very small headroom as in claim 1, wherein the metal frame (20) and PCB board (10) are fixed by a connector (30), and the connector (30) is a non-metal dielectric connector.
3. Dual-coupling antenna at very small headroom according to claim 2, characterized in that the distance between the metal frame (20) and the PCB board (10) is between 1.0mm and 2.0 mm.
4. A dual-coupling antenna at very small headroom as in claim 3, characterized in that the spacing between the metal frame (20) and the PCB board (10) is 1.5mm.
5. The dual-coupling antenna with very little headroom according to claim 1, wherein the PCB board (10) is a two-layer board with a substrate of FR4 board with epsilon = 4.3 and delta = 0.024.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078822.1A CN107681272B (en) | 2017-11-06 | 2017-11-06 | Dual-coupling antenna under extremely small headroom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078822.1A CN107681272B (en) | 2017-11-06 | 2017-11-06 | Dual-coupling antenna under extremely small headroom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107681272A CN107681272A (en) | 2018-02-09 |
| CN107681272B true CN107681272B (en) | 2023-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711078822.1A Active CN107681272B (en) | 2017-11-06 | 2017-11-06 | Dual-coupling antenna under extremely small headroom |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539373B (en) * | 2018-04-02 | 2020-07-07 | Oppo广东移动通信有限公司 | Shell assembly, antenna assembly, manufacturing method of antenna assembly and electronic equipment |
| CN109037909B (en) * | 2018-07-13 | 2021-02-09 | Oppo广东移动通信有限公司 | Antenna and electronic device |
| CN109066104B (en) * | 2018-08-14 | 2023-12-19 | 深圳市信维通信股份有限公司 | Antenna for mobile terminal Sub-6G |
| CN109301476B (en) * | 2018-11-21 | 2023-12-01 | 深圳市信维通信股份有限公司 | Flat LTE (Long term evolution) ultra-wideband antenna with metal back cover |
| CN109451411A (en) * | 2018-11-28 | 2019-03-08 | 深圳市南和移动通信科技股份有限公司 | Low interference player module and mobile terminal |
| CN111864349B (en) * | 2019-04-26 | 2021-12-28 | 北京小米移动软件有限公司 | Mobile terminal and antenna radiation method thereof |
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| CN107681272A (en) | 2018-02-09 |
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