CN105762512B - A kind of antenna - Google Patents
A kind of antenna Download PDFInfo
- Publication number
- CN105762512B CN105762512B CN201610179666.7A CN201610179666A CN105762512B CN 105762512 B CN105762512 B CN 105762512B CN 201610179666 A CN201610179666 A CN 201610179666A CN 105762512 B CN105762512 B CN 105762512B
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- antenna
- metal shell
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- spring
- antenna radiator
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
-
- 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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Waveguide Aerials (AREA)
- Support Of Aerials (AREA)
Abstract
The invention discloses a kind of antennas, the antenna includes: metal shell, and setting has the gap on the metal shell, and the gap separates the metal shell for two parts, the first part of the metal shell is as antenna radiator, and the second part of the metal shell is as ground；Feeding point, grounding point, capacitance connection point are provided on the antenna radiator；Wherein, the feeding point connects the antenna radiator and electric feed signal；The grounding point connects the antenna radiator and ground；The capacitance connection point connects the antenna radiator and tunable capacitor.
Description
Technical Field
The invention relates to an antenna technology, in particular to an antenna based on a metal shell.
Background
With the fourth generation (4G, 4)thGeneration), the current mobile terminals also increasingly support 4G networks, which requires wider bandwidth of the antenna to meet the user's requirements. On the other hand, with the further popularization of 4G terminals, the homogeneity of mobile phones is more and more serious, and people have higher and higher requirements on mobile phones, such as: body texture, user internet experience, and the like. Therefore, a metal type is provided by many mobile phone manufacturers, wherein the metal integrated mobile phone is beautifulIs popular with consumers. All-metal mobile phones improve the texture and the grade of the mobile phones, reduce the performance of the antenna because the metal has natural signal shielding characteristics, and meet the 4G standard without influencing the user experience, so that great challenge is brought to the antenna design.
In order not to affect the performance of the antenna, the performance of the antenna can be realized through the metal rear shell slot. Referring to fig. 1, the bottom of the metal back shell is used as a part of an antenna radiator and an appearance, a feed point and a ground point of an antenna are respectively located at two sides of the metal shell, an adjustable device is not used in the conventional antenna structure, the bandwidth of the antenna cannot be expanded, and the performance of the antenna is poor.
Disclosure of Invention
To solve the above technical problem, an embodiment of the present invention provides an antenna.
The antenna provided by the embodiment of the invention comprises: the antenna comprises a metal shell, a first antenna and a second antenna, wherein a gap is formed in the metal shell, the metal shell is divided into two parts by the gap, the first part of the metal shell is used as an antenna radiator, and the second part of the metal shell is used as the ground;
the antenna radiator is provided with a feed point, a grounding point and a capacitor connecting point; the feed point is connected with the antenna radiator and a feed signal; the grounding point is connected with the antenna radiator and the ground; the capacitor connecting point is connected with the antenna radiator and the adjustable capacitor.
In the embodiment of the invention, the feed point is connected with the antenna radiator through a feed spring sheet; the grounding point is connected with the antenna radiator through a grounding elastic sheet; the capacitor connecting point is connected with the antenna radiator through the capacitor elastic sheet.
In the embodiment of the present invention, the first end of the adjustable capacitor is connected to the antenna radiator through a capacitor elastic sheet, and the second end of the adjustable capacitor is connected to the ground through a PCB.
In the embodiment of the present invention, the antenna further includes: a Printed Circuit Board (PCB);
the adjustable capacitor is connected with the second part of the metal shell through a conducting circuit on the PCB.
In the embodiment of the present invention, a gasket is disposed between each of the feed spring, the ground spring, the capacitor spring, and the antenna radiator.
In an embodiment of the present invention, the grounding elastic sheet is located between the feeding elastic sheet and the capacitor elastic sheet, and the grounding elastic sheet is welded to a Universal Serial Bus (USB) interface.
In an embodiment of the present invention, the first portion of the metal shell includes: a first radiation area and a second radiation area;
wherein the first radiation area is: a part of metal shell between the feed spring and the grounding spring and a part of metal shell from the feed spring to the first edge metal shell;
the second radiation area is: the metal shell is arranged between the feed spring and the capacitor spring and between the capacitor spring and the second edge metal shell.
In an embodiment of the present invention, the radiation frequency of the first radiation area is a first frequency band; the radiation frequency of the second radiation area is a second frequency band; the first frequency band is higher than the second frequency band.
In an embodiment of the present invention, the first radiation area forms two resonant circuits, including: a first resonant circuit and a second resonant circuit; wherein,
the first resonant circuit is formed between the feeding elastic sheet and the grounding elastic sheet; the feed spring plate reaches the first edge metal shell, and the gap and the second part of the metal shell form the second resonant loop.
In the embodiment of the invention, the resonant frequency generated by the second radiation area is controlled to change in the first frequency band by adjusting the adjustable capacitor; through the adjustment of the adjustable capacitor, the second part of the metal shell induces voltage, and the second part of the metal shell generates radiation.
In the technical solution of the embodiment of the present invention, the antenna includes: the antenna comprises a metal shell, a first antenna and a second antenna, wherein a gap is formed in the metal shell, the metal shell is divided into two parts by the gap, the first part of the metal shell is used as an antenna radiator, and the second part of the metal shell is used as the ground; the antenna radiator is provided with a feed point, a grounding point and a capacitor connecting point; the feed point is connected with the antenna radiator and a feed signal; the grounding point is connected with the antenna radiator and the ground; the capacitor connecting point is connected with the antenna radiator and the adjustable capacitor. Therefore, the antenna bandwidth is expanded through the adjustable capacitor, the antenna efficiency is improved, the implementation cost is low, and the performance stability is high.
Drawings
FIG. 1 is a schematic diagram of a metal case based antenna;
fig. 2 is a first schematic diagram of an overall model of an antenna according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an overall model of an antenna according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a radiation area of an antenna according to an embodiment of the present invention;
FIG. 5 shows the S11 values of the antenna with different capacitance values of the tunable capacitor according to the embodiment of the present invention;
fig. 6 is a diagram of the efficiency of antenna testing according to an embodiment of the present invention.
Detailed Description
So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.
The embodiment of the invention provides an adjustable antenna based on a metal rear shell, and the technical scheme of the embodiment of the invention combines an antenna radiator based on the metal rear shell and an adjustable capacitor and widens the frequency bandwidth by adopting a simple tuning mode. Meanwhile, the technical scheme of the embodiment of the invention only utilizes the metal rear shell and does not have additional antenna support sections and tuning switches, thereby saving the cost, having simple and easy design and being well applied to the design of the mobile phone antenna based on the metal rear shell.
The antenna provided by the embodiment of the invention comprises: the antenna comprises a metal shell, a first antenna and a second antenna, wherein a gap is formed in the metal shell, the metal shell is divided into two parts by the gap, the first part of the metal shell is used as an antenna radiator, and the second part of the metal shell is used as the ground;
the antenna radiator is provided with a feed point, a grounding point and a capacitor connecting point; the feed point is connected with the antenna radiator and a feed signal; the grounding point is connected with the antenna radiator and the ground; the capacitor connecting point is connected with the antenna radiator and the adjustable capacitor.
In the embodiment of the invention, the feed point is connected with the antenna radiator through a feed spring sheet; the grounding point is connected with the antenna radiator through a grounding elastic sheet; the capacitor connecting point is connected with the antenna radiator through the capacitor elastic sheet.
In the embodiment of the present invention, the first end of the adjustable capacitor is connected to the antenna radiator through a capacitor elastic sheet, and the second end of the adjustable capacitor is connected to the ground through a PCB.
In the embodiment of the present invention, the antenna further includes: a PCB;
the adjustable capacitor is connected with the second part of the metal shell through a conducting circuit on the PCB.
In the embodiment of the present invention, a gasket is disposed between each of the feed spring, the ground spring, the capacitor spring, and the antenna radiator.
In the embodiment of the invention, the grounding elastic sheet is positioned between the feeding elastic sheet and the capacitor elastic sheet, and the grounding elastic sheet is welded with the USB interface.
In an embodiment of the present invention, the first portion of the metal shell includes: a first radiation area and a second radiation area;
wherein the first radiation area is: a part of metal shell between the feed spring and the grounding spring and a part of metal shell from the feed spring to the first edge metal shell;
the second radiation area is: the metal shell is arranged between the feed spring and the capacitor spring and between the capacitor spring and the second edge metal shell.
In an embodiment of the present invention, the radiation frequency of the first radiation area is a first frequency band; the radiation frequency of the second radiation area is a second frequency band; the first frequency band is higher than the second frequency band.
In an embodiment of the present invention, the first radiation area forms two resonant circuits, including: a first resonant circuit and a second resonant circuit; wherein,
the first resonant circuit is formed between the feeding elastic sheet and the grounding elastic sheet; the feed spring plate reaches the first edge metal shell, and the gap and the second part of the metal shell form the second resonant loop.
In the embodiment of the invention, the resonant frequency generated by the second radiation area is controlled to change in the first frequency band by adjusting the adjustable capacitor; through the adjustment of the adjustable capacitor, the second part of the metal shell induces voltage, and the second part of the metal shell generates radiation.
The antenna of the present invention will be described in further detail with reference to specific embodiments.
Fig. 2 is a schematic diagram of an overall model of an antenna according to an embodiment of the present invention. The antenna in this example is applied to a mobile phone, and of course, it should be understood by those skilled in the art that the antenna of the embodiment of the present invention may also be applied to other types of terminals, such as a tablet computer.
In fig. 2, the antenna includes: the antenna comprises a metal shell, wherein a gap 30 is arranged on the metal shell, the metal shell is divided into two parts by the gap 30, the first part 20 of the metal shell is used as an antenna radiator 20, and the second part 10 of the metal shell is used as the ground.
In the embodiment of the present invention, the antenna radiator 20 is a part of a metal casing, and the shape of the antenna radiator 20 is determined based on the metal casing, and in a specific implementation, the shape of the antenna radiator 20 may be various shapes according to design requirements of an electronic product, and in an embodiment, the antenna radiator 20 has an appearance of a three-dimensional (3D) arc surface, and the casing is about 1 mm thick.
In the embodiment of the present invention, the first portion 20 of the metal shell refers to the bottom of the metal shell, and the second portion 10 of the metal shell refers to the middle or more of the metal shell. In one embodiment, the metal housing may also be provided with two slots, such that the metal housing is divided into three parts, the bottom of the metal housing still serves as the antenna radiator 20, and the middle of the metal housing serves as the ground.
In the embodiment of the present invention, the antenna radiator 20 is provided with a feeding point, a grounding point, and a capacitor connection point; wherein the feeding point connects the antenna radiator 20 and a feeding signal; the ground point connects the antenna radiator 20 with the ground; the capacitor connection point connects the antenna radiator 20 and the adjustable capacitor.
It can be seen that the antenna radiator 20 in the embodiment of the present invention is connected to the adjustable capacitor through the capacitor connection point, and the change of the adjustable capacitor can realize the adjustment of the antenna bandwidth, thereby increasing the antenna bandwidth.
In the embodiment of the present invention, the feeding point is connected to the antenna radiator 20 through a feeding elastic sheet 21; the grounding point is connected with the antenna radiator 20 through a grounding elastic sheet 22; the capacitor connection point is connected to the antenna radiator 20 through a capacitor spring 23.
Referring to fig. 3, in the embodiment of the present invention, a first end of the adjustable capacitor 24 is connected to the antenna radiator 20 through the capacitor elastic sheet 23, and a second end of the adjustable capacitor 24 is connected to ground through the PCB 41.
Specifically, the antenna further includes: a PCB 41;
the adjustable capacitor 24 is connected to the second part 10 of the metal housing by conductive tracks on the PCB 41.
Here, the conductive line may be a copper line.
Referring to fig. 3, in the embodiment of the present invention, a gasket 25 is disposed between the feed spring 21, the ground spring 22, and the capacitor spring 23, and the antenna radiator 20.
In this way, the strength between each spring and the antenna radiator is increased by each spacer 25.
In the embodiment of the present invention, the grounding elastic sheet 22 is located between the feeding elastic sheet 21 and the capacitor elastic sheet 23, and the grounding elastic sheet 22 is welded to the USB interface.
Here, the USB interface is connected to ground.
Fig. 4 is a schematic diagram of a radiation area of an antenna according to an embodiment of the present invention. The antenna in this example is applied to a mobile phone, and of course, it should be understood by those skilled in the art that the antenna of the embodiment of the present invention may also be applied to other types of terminals, such as a tablet computer.
In fig. 4, the first portion 20 of the metal shell comprises: a first radiation area and a second radiation area;
wherein the first radiation area is: a part of metal shell between the feeding elastic sheet 21 and the grounding elastic sheet 22 and a part of metal shell from the feeding elastic sheet 21 to the first edge metal shell.
The second radiation area is: a part of metal shell between the feeding elastic sheet 21 and the capacitor elastic sheet 23 and a part of metal shell from the capacitor elastic sheet 23 to the second edge metal shell.
In the embodiment of the present invention, the first radiation region corresponds to a region a in fig. 3, and the second radiation region corresponds to a region B in fig. 3.
The radiation frequency of the first radiation area is a first frequency band; the radiation frequency of the second radiation area is a second frequency band; the first frequency band is higher than the second frequency band.
In the embodiment of the present invention, the first frequency band is a high frequency band, and the region indicated by a is a high frequency radiation region. The area A comprises a metal shell part between the feed spring and the grounding spring and a metal shell from the feed spring to the nearest edge.
In the embodiment of the present invention, the second frequency band is a low frequency band, and the region indicated by B is a low frequency radiation region. The area B comprises a metal shell part between the feed spring and the capacitor spring and a metal shell from the capacitor spring to the nearest edge.
In an embodiment of the present invention, the first radiation area forms two resonant circuits, including: a first resonant circuit and a second resonant circuit; wherein,
the first resonant circuit is formed between the feeding elastic sheet and the grounding elastic sheet; the feed spring plate reaches the first edge metal shell, and the gap and the second part of the metal shell form the second resonant loop.
Referring to fig. 4, the first resonant tank corresponds to: the two high-frequency resonances are respectively determined by the length between the feed spring and the grounding spring; the second resonant circuit corresponds to: and feeding the elastic sheet to the metal shell at the nearest edge to form a coupling loop antenna mode with the metal shell ground through the slot.
In the embodiment of the invention, for a low-frequency radiation area (namely, an area B), the resonant frequency generated by the second radiation area is controlled to change in the first frequency band through the adjustment of the adjustable capacitor; through the adjustment of the adjustable capacitor, the second part of the metal shell induces voltage, and the second part of the metal shell generates radiation.
Specifically, the length of the low-frequency resonance is adjusted by the adjustable capacitor, and the capacitor elastic sheet connected with the adjustable capacitor is positioned on one side of the antenna radiator close to the slit, namely, the induced voltage of the second part (namely, the metal shell ground) of the metal shell can be influenced by the slit coupling through the change of the voltage on the adjustable capacitor, and the radiation efficiency is improved through the partial radiation of the second part of the metal shell. Meanwhile, the capacitor elastic sheet of the adjustable capacitor is close to the edge of the low-frequency radiation area and is an area with the highest voltage, and the voltage distribution of the area can be directly influenced by the change of the capacitance value of the adjustable capacitor, so that the resonant frequency is influenced, and the purpose of increasing the bandwidth is realized.
Fig. 5 shows S11 values of the antenna with different capacitance values of the tunable capacitor according to the embodiment of the present invention, and it can be seen that the antenna completely covers the mobile communication band. Here, the S11 value represents the return loss characteristic, the dB value of the loss and the impedance characteristic of which are generally seen by a network analyzer. The S11 value indicates the transmission efficiency of the antenna, and the larger the S11 value is, the larger the energy reflected by the antenna is, so the efficiency of the antenna is worse.
Fig. 6 is an antenna test efficiency diagram according to an embodiment of the present invention, where a curve 50 is actual measurement efficiency in the prior art, and curves 51 to 53 are actual measurement efficiency in three states of adjustable capacitance values of 2.7pF, 1.5pF, and 1pF, respectively. It can be seen from the figure that the antenna of the embodiment of the present invention has better efficiency under high and low frequency operation than the prior art.
The technical scheme of the embodiment of the invention increases the bandwidth of the antenna, and has low implementation cost and high performance stability.
The technical schemes described in the embodiments of the present invention can be combined arbitrarily without conflict.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (8)
1. An antenna, the antenna comprising: the antenna comprises a metal shell, a first antenna and a second antenna, wherein a gap is formed in the metal shell, the metal shell is divided into two parts by the gap, the first part of the metal shell is used as an antenna radiator, and the second part of the metal shell is used as the ground;
the antenna radiator is provided with a feed point, a grounding point and a capacitor connecting point; the feed point is connected with the antenna radiator and a feed signal; the grounding point is connected with the antenna radiator and the ground; the capacitor connecting point is connected with the antenna radiator and the adjustable capacitor;
the feed point is connected with the antenna radiator through a feed spring sheet; the grounding point is connected with the antenna radiator through a grounding elastic sheet; the capacitor connecting point is connected with the antenna radiator through a capacitor elastic sheet;
the first portion of the metal shell includes: a first radiation area and a second radiation area; the first radiation area is: a part of metal shell between the feed spring and the grounding spring and a part of metal shell from the feed spring to the first edge metal shell; the second radiation area is: the metal shell is arranged between the feed spring and the capacitor spring and between the capacitor spring and the second edge metal shell.
2. The antenna of claim 1, wherein a first end of the tunable capacitor is coupled to the antenna radiator via a capacitor strap, and a second end of the tunable capacitor is coupled to ground via a PCB.
3. The antenna of claim 2, further comprising: a Printed Circuit Board (PCB);
the adjustable capacitor is connected with the second part of the metal shell through a conducting circuit on the PCB.
4. The antenna of claim 1, wherein a gasket is disposed between the feed spring, the ground spring, and the capacitor spring and the antenna radiator.
5. The antenna of claim 1, wherein the grounding spring is disposed between the feeding spring and the capacitor spring, and the grounding spring is welded to a USB interface.
6. The antenna of claim 1, the first radiating region radiating at a frequency in a first frequency band; the radiation frequency of the second radiation area is a second frequency band; the first frequency band is higher than the second frequency band.
7. The antenna of claim 6, the first radiating area forming two resonant tanks, comprising: a first resonant circuit and a second resonant circuit; wherein,
the first resonant circuit is formed between the feeding elastic sheet and the grounding elastic sheet; the feed spring plate reaches the first edge metal shell, and the gap and the second part of the metal shell form the second resonant loop.
8. The antenna of claim 6, wherein the resonant frequency generated by the second radiation area is controlled to change in the first frequency band by adjusting the adjustable capacitor; through the adjustment of the adjustable capacitor, the second part of the metal shell induces voltage, and the second part of the metal shell generates radiation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610179666.7A CN105762512B (en) | 2016-03-25 | 2016-03-25 | A kind of antenna |
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| CN201610179666.7A CN105762512B (en) | 2016-03-25 | 2016-03-25 | A kind of antenna |
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| CN105762512A CN105762512A (en) | 2016-07-13 |
| CN105762512B true CN105762512B (en) | 2019-03-08 |
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| CN201610179666.7A Active CN105762512B (en) | 2016-03-25 | 2016-03-25 | A kind of antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106465556B (en) | 2016-07-21 | 2019-01-18 | 北京小米移动软件有限公司 | Metal cap body and electronic equipment |
| CN107732417A (en) * | 2016-08-11 | 2018-02-23 | 北京小米移动软件有限公司 | Terminal device |
| CN108574134A (en) * | 2017-03-07 | 2018-09-25 | 北京小米移动软件有限公司 | Antenna and terminal device for terminal device |
| US10200105B2 (en) * | 2017-06-29 | 2019-02-05 | Apple Inc. | Antenna tuning components in patterned conductive layers |
| CN107425267A (en) * | 2017-09-08 | 2017-12-01 | 深圳天珑无线科技有限公司 | The antenna structure and mobile terminal of mobile terminal |
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| CN204271242U (en) * | 2014-12-29 | 2015-04-15 | 上海安费诺永亿通讯电子有限公司 | A kind of adjustable antenna for all-metal construction communication terminal device |
| CN204596947U (en) * | 2015-05-12 | 2015-08-26 | 联想(北京)有限公司 | Mobile terminal antenna and mobile terminal |
| CN105098325A (en) * | 2015-08-12 | 2015-11-25 | 宇龙计算机通信科技(深圳)有限公司 | Antenna structure and communication terminal |
| CN205051738U (en) * | 2015-07-14 | 2016-02-24 | 瑞声精密制造科技(常州)有限公司 | Mobile communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9680223B2 (en) * | 2014-06-26 | 2017-06-13 | Htc Corporation | Mobile device and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204271242U (en) * | 2014-12-29 | 2015-04-15 | 上海安费诺永亿通讯电子有限公司 | A kind of adjustable antenna for all-metal construction communication terminal device |
| CN204596947U (en) * | 2015-05-12 | 2015-08-26 | 联想(北京)有限公司 | Mobile terminal antenna and mobile terminal |
| CN205051738U (en) * | 2015-07-14 | 2016-02-24 | 瑞声精密制造科技(常州)有限公司 | Mobile communication device |
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