CN113839176A - Bluetooth audio frequency product antenna - Google Patents
Bluetooth audio frequency product antenna Download PDFInfo
- Publication number
- CN113839176A CN113839176A CN202110893951.6A CN202110893951A CN113839176A CN 113839176 A CN113839176 A CN 113839176A CN 202110893951 A CN202110893951 A CN 202110893951A CN 113839176 A CN113839176 A CN 113839176A
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- Prior art keywords
- antenna
- radio frequency
- capacitor
- touch
- isolation circuit
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- 238000002955 isolation Methods 0.000 claims abstract description 42
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 46
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 claims description 4
- 230000002238 attenuated effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 claims 1
- 230000008054 signal transmission Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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Classifications
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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
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
- 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
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- Details Of Aerials (AREA)
Abstract
The invention relates to a Bluetooth audio product antenna, which is applied to: in an in-ear headphone, comprising: the FPC antenna and the touch switch share one body, and the thimble, the feed point, the antenna matching part, the radio frequency transmission line, the radio frequency chip, the control mainboard, the signal isolation circuit and the touch chip are arranged on the same plane; the FPC antenna and the touch switch share one body and are connected with the first end of the thimble; the second end of the thimble is connected with the feed point; the first end of the feed point is connected with the first end of the signal isolation circuit; the second end of the signal isolation circuit is connected with the touch chip; the second end of the feed point is connected with the first end of the antenna matching part; and the second end of the antenna matching part is connected with the radio frequency chip. Through FPC antenna and touch switch sharing an organic whole in this application embodiment, saved antenna and touch switch's occupation space, reduced antenna and touch switch and interfere with each other, the radio frequency signal transmission distance of bluetooth is close, has promoted the radio frequency signal transmission distance of bluetooth, compares prior art touch area big, and touch function experiences well.
Description
Technical Field
The invention relates to the technical field of Bluetooth audio, in particular to a Bluetooth audio product antenna.
Background
Currently, the antenna of bluetooth audio products is commonly used: 1. LDS/FPC antenna, which requires independent antenna space. 2. To the bluetooth audio frequency product of the small volume in-ear formula that has Touch control function, the antenna is placed the space and is occupied by the Touch area, and the antenna area is extruded, can cause antenna inefficiency, and wireless signal radiation can not come out, and user experience is poor and wireless communication distance is near. Regarding the small-volume in-ear Bluetooth earphone, Touch is an independent FPC/LDS, and the Bluetooth 2.4GHZ antenna is also an independent FPC/LDS, which are separated.
The disadvantage is that the distance between the antenna and the touch is short, which results in short transmission distance of the antenna; the antenna and the touch need to occupy large space; the antenna needs to meet the wavelength lambda 1/4, the Touch area is small due to the antenna area, the probability of mistaken Touch of a user is high, and the Touch function experience is poor; the cost of the antenna and Touch is high.
Disclosure of Invention
The Bluetooth audio product antenna provided by the invention can solve the technical problems that the area of the antenna is small, the probability of user Touch errors is high, the Touch function experience is poor and the like.
The technical scheme for solving the technical problems is as follows:
the embodiment of the invention provides a Bluetooth audio product antenna, which is applied to the following parts: in an in-ear headphone, characterized by comprising:
the FPC antenna and the touch switch share one body, and the thimble, the feed point, the antenna matching part, the radio frequency transmission line, the radio frequency chip, the control mainboard, the signal isolation circuit and the touch chip are arranged on the same plane;
the FPC antenna and the touch switch share one body and are connected with the first end of the thimble;
the second end of the thimble is connected with the feed point;
the first end of the feed point is connected with the first end of the signal isolation circuit;
the second end of the signal isolation circuit is connected with the touch chip;
the second end of the feed point is connected with the first end of the antenna matching part;
and the second end of the antenna matching part is connected with the radio frequency chip.
In some embodiments, in the above-described bluetooth audio product antenna,
the feed point, the antenna matching part, the radio frequency chip, the signal isolation circuit and the touch chip are all arranged on the control mainboard.
In some embodiments, in the above-described bluetooth audio product antenna,
the first end of the feed point is connected with the first end of the signal isolation circuit through the radio frequency transmission line;
the second end of the signal isolation circuit is connected with the touch chip through the radio frequency transmission line;
the second end of the feed point is connected with the first end of the antenna matching part through the radio frequency transmission line;
and the second end of the antenna matching part is connected with the radio frequency chip through the radio frequency transmission line.
In some embodiments, in the above-described bluetooth audio product antenna,
the signal isolation circuit is a 2.4GHZ signal isolation circuit consisting of inductors.
In some embodiments, in the above-described bluetooth audio product antenna,
the 2.4GHZ signal isolation circuit is used for blocking the influence of Bluetooth 2.4GHZ radio frequency signals on the touch switch and separating the touch switch signals to the touch chip.
In some embodiments, in the above-described bluetooth audio product antenna,
the 2.4GHz signal isolation circuit is also used for blocking the 2.4GHz radio frequency signals of the Bluetooth from being attenuated.
In some embodiments, in the above-described bluetooth audio product antenna,
2.4GHZ signal isolation circuitry comprising:
the circuit comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and an inductor;
the first end of the first capacitor, the first end of the third capacitor and the first end of the fourth capacitor are all grounded:
the second capacitor, the third capacitor, the fourth capacitor and the inductor are connected in series;
the first capacitor is connected in parallel with the third capacitor.
In some embodiments, in the above-described bluetooth audio product antenna,
the input pin of the touch chip comprises an externally hung parallel connection with the fourth capacitor for grounding, and is used for adjusting the touch sensitivity of the touch switch.
In some embodiments, in the above-described bluetooth audio product antenna,
the capacitance value adjusting range of the fourth capacitor is within a preset range.
In some embodiments, in the above-described bluetooth audio product antenna,
the FPC antenna and the touch switch are integrated, and the shape of the touch switch is changed along with the change of the shape of the FPC antenna.
The invention has the beneficial effects that: a Bluetooth audio product antenna is applied to a Bluetooth audio product antenna comprising: in an in-ear headphone, comprising: the FPC antenna and the touch switch share one body, and the thimble, the feed point, the antenna matching part, the radio frequency transmission line, the radio frequency chip, the control mainboard, the signal isolation circuit and the touch chip are arranged on the same plane; the FPC antenna and the touch switch share one body and are connected with the first end of the thimble; the second end of the thimble is connected with the feed point; the first end of the feed point is connected with the first end of the signal isolation circuit; the second end of the signal isolation circuit is connected with the touch chip; the second end of the feed point is connected with the first end of the antenna matching part; and the second end of the antenna matching part is connected with the radio frequency chip. In the embodiment of the application, the FPC antenna and the touch switch are shared into a whole, so that the occupied space of the FPC antenna and the touch switch is saved, the mutual interference between the FPC antenna and the touch switch is reduced, meanwhile, the radio frequency signal transmission distance of the Bluetooth is short, the radio frequency signal transmission distance of the Bluetooth is increased, and compared with the prior art, the touch area is large, and the touch function experience is good; compared with the FPC antenna in the prior art, two ejector pins are reduced, and meanwhile, the cost of the FPC antenna and the cost of the touch switch are reduced.
Drawings
Fig. 1 is a schematic diagram of an antenna structure of a bluetooth audio product according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a 2.4GHZ signal isolation circuit according to an embodiment of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
In order that the above objects, features and advantages of the present application can be more clearly understood, the present disclosure will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present disclosure, and not all embodiments. The specific embodiments described herein are merely illustrative of the disclosure and are not limiting of the application. All other embodiments that can be derived by one of ordinary skill in the art from the description of the embodiments are intended to be within the scope of the present disclosure.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Fig. 1 is a schematic diagram of an antenna structure of a bluetooth audio product according to an embodiment of the present invention.
The embodiment of the invention provides a Bluetooth audio product antenna, which is applied to the following parts: in-ear headphones, in combination with fig. 1, comprising:
the FPC antenna and the touch switch share one body 1, a thimble 2, a feed point 9, an antenna matching part 3, a radio frequency transmission line 4, a radio frequency chip 5, a control mainboard 6, a signal isolation circuit 8 and a touch chip 7:
the FPC antenna and the touch switch share an integral body 1 which is connected with the first end of the thimble 2;
the second end of the thimble 2 is connected with the feed point 9;
a first end of the feed point 9 is connected with a first end of the signal isolation circuit 8;
the second end of the signal isolation circuit 8 is connected with the touch chip 7;
the second end of the feed point 9 is connected with the first end of the antenna matching section 3;
the second end of the antenna matching section 3 is connected to the radio frequency chip 5.
In some embodiments, in the above-described bluetooth audio product antenna,
the feed point 9, the antenna matching part 3, the radio frequency chip 5, the signal isolation circuit 8 and the touch chip 7 are all arranged on the control mainboard 6.
Specifically, referring to fig. 1, the feed point 9, the antenna matching portion 3, the radio frequency chip 5, the signal isolation circuit 8, and the touch chip 7 are all disposed on the PCB.
Specifically, in the embodiment of the application, in the small-size in-ear bluetooth headset, the FPC antenna and the touch switch are shared into a whole 1, and the FPC antenna and the touch switch are integrated into a whole, so that the occupied space of the FPC antenna and the touch switch is saved; the mutual interference of the FPC antenna and the touch switch is reduced, the radio frequency signal transmission distance of the Bluetooth is short, the radio frequency signal transmission distance of the Bluetooth is increased, the touch area is large, the touch function is good in experience, the FPC antenna is provided with two ejector pins 2, and meanwhile the cost of the FPC antenna and the cost of the touch switch are reduced.
In some embodiments, in the above-described bluetooth audio product antenna,
the FPC antenna and the touch switch share one body 1, and the shape of the touch switch changes along with the change of the shape of the FPC antenna.
Specifically, in the embodiment of the present application, the wavelength λ of the electromagnetic wave signal applied to the FPC antenna is 120.97-125mm, the total length of the radiating element is 1/4 of the wavelength λ, and in a small-volume structure, in order to achieve the length of the wavelength λ 1/4, the FPC antenna may change uniquely and variously along with the change of different appearance products, such as a strip, a circle, a spiral, and the like, so that the shape of the touch switch also changes variously along with the change of the antenna.
In some embodiments, in the above-described bluetooth audio product antenna,
the first end of the feed point 9 is connected with the first end of the signal isolation circuit 8 through the radio frequency transmission line 4;
the second end of the signal isolation circuit 8 is connected with the touch chip 7 through the radio frequency transmission line 4;
the second end of the feed point 9 is connected to the first end of the antenna matching section 3 via said radio frequency transmission line 4:
the second end of the antenna matching part 3 is connected with the radio frequency chip 5 through the radio frequency transmission line 4.
In the embodiment of the application, the shape of the touch switch changes along with the change of the shape of the FPC antenna, the FPC antenna performance and the touch switch performance need to be considered, the change of the FPC antenna can lead to poor performance of the touch switch, a signal isolation circuit is arranged for the touch switch, and the touch switch is prevented from being mistakenly identified when the earphone is worn, so that poor experience is caused, the touch switch needs to adjust user experience indexes according to human structure to achieve the best state, and meanwhile, the antenna directivity performance cannot be poor.
Fig. 2 is a schematic diagram of a 2.4GHZ signal isolation circuit according to an embodiment of the present invention.
In some embodiments, in conjunction with fig. 1 and 2, in the bluetooth audio product antenna described above,
fig. 2 is a 2.4GHZ signal isolation circuit formed by inductors.
In some embodiments, in the above-described bluetooth audio product antenna,
the 2.4GHZ signal isolation circuit is used for blocking the influence of Bluetooth 2.4GHZ radio frequency signals on the touch switch and separating the touch switch signals to the touch chip 7.
In some embodiments, in the above-described bluetooth audio product antenna,
the 2.4GHz signal isolation circuit is also used for blocking the 2.4GHz radio frequency signals of the Bluetooth from being attenuated.
In some embodiments, in the above-described bluetooth audio product antenna,
2.4GHZ signal isolation circuitry, in conjunction with FIG. 2, comprising:
a first capacitor CC1, a second capacitor CC2, a third capacitor CC3, a fourth capacitor CC4 and an inductor LL 1;
a first end of the first capacitor CC1, a first end of the third capacitor CC3, and a first end of the fourth capacitor CC4 are all grounded;
the second capacitor CC2, the third capacitor CC3, the fourth capacitor CC4 and the inductor LL1 are connected in series;
the first capacitor CC1 is connected in parallel with the third capacitor CC 3.
Specifically, in conjunction with fig. 2, the size of the inductor LL1 in the embodiment of the present application is 39nH, and the sizes of the second capacitor CC2 and the fourth capacitor CC4 are 10 pF.
In some embodiments, in the above-described bluetooth audio product antenna,
the TOUCH INPUT pin of the TOUCH chip 7 comprises an external plug-in parallel connection with the fourth capacitor CC4 to be grounded, and is used for adjusting the TOUCH sensitivity.
Specifically, in the embodiment of the present application, after the FPC antenna and the touch switch are integrated, the touch chip 7 requires a plug-in parallel capacitor to the ground for adjusting the touch sensitivity of the touch switch.
In some embodiments, in the above-described bluetooth audio product antenna,
the capacitance value adjustment range of the fourth capacitor CC4 is within a preset range.
Specifically, in the embodiment of the present application, the preset range is between 1.5 to 33pF, and the capacitance adjustment range of the fourth capacitor is between 1.5 to 33pF, because the capacitance adjustment range has a filtering effect on the high frequency of 2.4GHZ at the same time.
Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments.
Those skilled in the art will appreciate that the description of each embodiment has a respective emphasis, and reference may be made to the related description of other embodiments for those parts of an embodiment that are not described in detail.
Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art will be able to make various modifications and variations without departing from the spirit and scope of the application, and such modifications and variations are included in the specific embodiments of the present invention as defined in the appended claims, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of various equivalent modifications and substitutions within the technical scope of the present disclosure, and these modifications and substitutions are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a bluetooth audio product antenna which characterized in that is applied to in-ear earphone, its characterized in that includes:
the FPC antenna and the touch switch share one body, and the thimble, the feed point, the antenna matching part, the radio frequency transmission line, the radio frequency chip, the control mainboard, the signal isolation circuit and the touch chip are arranged on the same plane;
the FPC antenna and the touch switch share the same structure and are connected with the first end of the thimble;
the second end of the thimble is connected with the feed point;
the first end of the feed point is connected with the first end of the signal isolation circuit;
the second end of the signal isolation circuit is connected with the touch chip;
the second end of the feed point is connected with the first end of the antenna matching part;
and the second end of the antenna matching part is connected with the radio frequency chip.
2. The Bluetooth audio product antenna of claim 1,
the feed point, the antenna matching part, the radio frequency chip, the signal isolation circuit and the touch chip are all arranged on the control mainboard.
3. The Bluetooth audio product antenna of claim 1,
the first end of the feed point is connected with the first end of the signal isolation circuit through the radio frequency transmission line;
the second end of the signal isolation circuit is connected with the touch chip through the radio frequency transmission line;
the second end of the feed point is connected with the first end of the antenna matching part through the radio frequency transmission line;
and the second end of the antenna matching part is connected with the radio frequency chip through the radio frequency transmission line.
4. The bluetooth audio product antenna of claim 1, wherein the signal isolation circuit is an inductive 2.4GHZ signal isolation circuit.
5. The bluetooth audio product antenna of claim 4, wherein the 2.4GHZ signal isolation circuit is configured to isolate the touch switch signal from the touch chip by blocking an effect of the bluetooth 2.4GHZ radio frequency signal on the touch switch.
6. The bluetooth audio product antenna of claim 4, wherein the 2.4GHZ signal isolation circuit is further configured to block bluetooth 2.4GHZ radio frequency signals from being attenuated.
7. The bluetooth audio product antenna of claim 4, wherein the 2.4GHZ signal isolation circuit comprises:
the circuit comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and an inductor;
the first end of the first capacitor, the first end of the third capacitor and the first end of the fourth capacitor are all grounded;
the second capacitor, the third capacitor, the fourth capacitor and the inductor are connected in series;
the first capacitor is connected in parallel with the third capacitor.
8. The bluetooth audio product antenna of claim 1, wherein the touch chip input pin comprises an external plug connected in parallel with the fourth capacitor ground for adjusting touch sensitivity of the touch switch.
9. The Bluetooth audio product antenna of claim 8,
the capacitance value adjusting range of the fourth capacitor is within a preset range.
10. The bluetooth audio product antenna of claim 1, wherein the FPC antenna is integrated with a touch switch, and the shape of the touch switch changes as the shape of the FPC antenna changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110893951.6A CN113839176A (en) | 2021-08-04 | 2021-08-04 | Bluetooth audio frequency product antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110893951.6A CN113839176A (en) | 2021-08-04 | 2021-08-04 | Bluetooth audio frequency product antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113839176A true CN113839176A (en) | 2021-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110893951.6A Pending CN113839176A (en) | 2021-08-04 | 2021-08-04 | Bluetooth audio frequency product antenna |
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| CN (1) | CN113839176A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI849470B (en) * | 2022-08-05 | 2024-07-21 | 英華達股份有限公司 | Antenna circuit of wireless electronic device and operation method thereof |
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| CN202634397U (en) * | 2012-04-25 | 2012-12-26 | 深圳市东润达科技有限公司 | Soft-touch type detection circuit and visual intercom system formed by the same |
| CN110798766A (en) * | 2018-08-02 | 2020-02-14 | 禾伸堂企业股份有限公司 | Bluetooth earphone combining antenna and touch sensing piece |
| CN210697367U (en) * | 2019-07-22 | 2020-06-09 | 浙江绍兴苏泊尔生活电器有限公司 | Food processer circuit and food processer |
| CN111493361A (en) * | 2019-01-29 | 2020-08-07 | 常州市派腾电子技术服务有限公司 | Voltage output circuit, electronic device and electronic cigarette |
| CN211930841U (en) * | 2020-06-01 | 2020-11-13 | Tcl通力电子（惠州）有限公司 | Signal isolation circuit and bluetooth headset |
-
2021
- 2021-08-04 CN CN202110893951.6A patent/CN113839176A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202634397U (en) * | 2012-04-25 | 2012-12-26 | 深圳市东润达科技有限公司 | Soft-touch type detection circuit and visual intercom system formed by the same |
| CN110798766A (en) * | 2018-08-02 | 2020-02-14 | 禾伸堂企业股份有限公司 | Bluetooth earphone combining antenna and touch sensing piece |
| CN111493361A (en) * | 2019-01-29 | 2020-08-07 | 常州市派腾电子技术服务有限公司 | Voltage output circuit, electronic device and electronic cigarette |
| CN210697367U (en) * | 2019-07-22 | 2020-06-09 | 浙江绍兴苏泊尔生活电器有限公司 | Food processer circuit and food processer |
| CN211930841U (en) * | 2020-06-01 | 2020-11-13 | Tcl通力电子（惠州）有限公司 | Signal isolation circuit and bluetooth headset |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI849470B (en) * | 2022-08-05 | 2024-07-21 | 英華達股份有限公司 | Antenna circuit of wireless electronic device and operation method thereof |
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