CN109586019B - PCB coupling antenna structure and mobile terminal thereof - Google Patents
PCB coupling antenna structure and mobile terminal thereof Download PDFInfo
- Publication number
- CN109586019B CN109586019B CN201811389410.4A CN201811389410A CN109586019B CN 109586019 B CN109586019 B CN 109586019B CN 201811389410 A CN201811389410 A CN 201811389410A CN 109586019 B CN109586019 B CN 109586019B
- Authority
- CN
- China
- Prior art keywords
- pcb
- antenna
- elastic sheet
- microphone
- bottom layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H01Q1/44—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
-
- 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
Abstract
The invention discloses a PCB coupling antenna structure and a mobile terminal thereof, which comprises an antenna small plate, wherein the antenna small plate comprises a PCB bottom layer and a PCB top layer arranged at the upper end of the PCB bottom layer, a grounding elastic sheet, a feed elastic sheet arranged side by side with the grounding elastic sheet and a coupling groove adjacent to one side of the grounding elastic sheet are arranged on the PCB top layer, a microphone is arranged on the PCB bottom layer, the microphone is arranged below a clearance area at one side of the grounding elastic sheet, and a microphone body is used as a part of antenna resonance, so that the influence of the microphone on the antenna efficiency is reduced while the integration level of the PCB is improved.
Description
Technical Field
The invention relates to the field of mobile terminal antenna design, in particular to a PCB coupling antenna structure and a mobile terminal thereof.
Background
With the continuous development of the communication industry, especially the trend that a full screen becomes a mobile terminal, the antenna clearance and the device stacking are more and more compact, and higher requirements are provided for the integration level of the current communication system. Many metal devices can be placed in the area of the antenna, and how to reduce the influence of the metal devices on the mobile terminal antenna is a very concern in the whole industry.
In wireless communication, an antenna is often fixed on a PCB in a mobile manner, that is, on a PCB of a mobile terminal, so as to serve as a receiving and transmitting terminal for a communication circuit signal on the PCB. Because the microphone and the loudspeaker need a certain distance to prevent crosstalk, the microphone has to be placed at the antenna spring sheet accessory, the antenna clearance is occupied, and the antenna performance is inevitably reduced.
Therefore, the prior art still needs to be improved and developed.
Disclosure of Invention
The invention aims to provide a PCB coupling antenna structure, which achieves the aim of reducing the influence of a microphone on the antenna efficiency while improving the integration level of a PCB.
The technical purpose of the invention is realized by the following technical scheme:
including the antenna platelet, wherein, the antenna platelet include the PCB bottom and set up in the PCB top layer of PCB bottom upper end, be provided with ground connection shell fragment on the PCB top layer, with feed shell fragment that ground connection shell fragment set up side by side and border on in the coupling groove of ground connection shell fragment one side, be provided with the microphone on the PCB bottom, the microphone set up in the below of ground connection shell fragment one side headroom region.
The PCB coupling antenna structure is characterized in that the feed spring, the grounding spring, the coupling groove and the microphone enclose a high-frequency coupling resonance loop, and the circumference of the high-frequency coupling resonance loop is set to be the length which enables the high-frequency coupling resonance to be in a quarter wavelength.
The PCB coupling antenna structure is characterized in that the feed spring plate is connected to the bottom layer of the PCB through a feed line, and resonance is adjusted by controlling the coupling groove and the feed line of the feed spring plate.
The PCB coupling antenna structure is characterized in that the circumference of the coupling groove is 18-20 mm.
The PCB coupling antenna structure is characterized in that a PCB edge covering the microphone connecting wire is arranged on the PCB bottom layer, and the PCB edge is grounded and arranged on the other side, opposite to the feed elastic sheet, of the coupling groove.
The PCB coupling antenna structure, wherein still be provided with radio frequency connector and antenna matching module on the PCB top layer, antenna matching module connect in between radio frequency connector and the ground shell fragment of feeding.
The PCB coupling antenna structure is characterized in that the antenna matching module is connected with the feed spring plate and the radio frequency connector through a feeder line.
The PCB coupling antenna structure is characterized in that a switch elastic sheet is further arranged on the PCB bottom layer and connected to the PCB bottom layer through a connecting line, and the switch elastic sheet and the feed elastic sheet are separated by a preset distance to form the PIFA antenna.
The PCB coupling antenna structure is characterized in that the distance between the switch elastic sheet and the feed elastic sheet is 10-15 mm.
A mobile terminal comprising a PCB coupled antenna structure as claimed in any preceding claim.
In summary, the PIFA antenna is formed by the feeding spring and the switch spring, the microphone is used as a part of antenna resonance, and the microphone ground and the antenna spring form a high-frequency coupling resonance frequency, so that the integration level of the PCB is improved, the influence of the microphone on the antenna performance is reduced, the distance between the coupling slot and the antenna of the feeding spring is controlled, or the coupling resonance frequency is adjusted by extending the antenna of the feeding spring.
Drawings
Fig. 1 is a schematic structural diagram of the top layer of the PCB in this embodiment.
Fig. 2 is a schematic structural diagram of a bottom layer of the PCB in the present embodiment.
In the figure: 1. a PCB top layer; 2. a PCB bottom layer; 3. a feed spring plate; 4. a grounding elastic sheet; 5. a microphone; 6. a switch spring plate; 7. a coupling groove; 8. an antenna matching module; 9. a radio frequency connector.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example (b): the embodiment of the invention provides a PCB coupling antenna structure, which comprises an antenna small plate as shown in figures 1 and 2, wherein the antenna small plate comprises a PCB bottom layer 2 and a PCB top layer 1, the PCB top layer 1 is arranged at the upper end of the PCB bottom layer 2, a grounding elastic sheet 4 and a feeding elastic sheet 3 are arranged on the PCB top layer 1, specifically, a pad of the grounding elastic sheet 4 and a pad of the feeding elastic sheet 3 are arranged on the PCB top layer 1, and the grounding elastic sheet 3 and the feeding elastic sheet 4 are respectively welded and fixed on the corresponding pads.
The feed spring 3 is used as a feed source and is connected to the PCB top layer 1 through a feed line, the feed spring 3 and the grounding spring 4 are arranged side by side, and a design gap is reserved between the feed spring 3 and the grounding spring 4. If the design gap is too small, the feeding elastic sheet 3 and the grounding elastic sheet 4 are easily welded together during processing, which causes a short circuit, and if the design gap is too large, the resonance between the feeding elastic sheet 3 and the grounding elastic sheet 4 is affected, so in this embodiment, the design gap between the feeding elastic sheet 3 and the grounding elastic sheet 4 is preferably 0.5 mm.
A coupling groove 7 is formed in the PCB top layer 1, and one side, adjacent to the grounding elastic sheet 4, of the coupling groove 7 is formed. A clearance area is arranged on one side, located on the grounding elastic sheet 4, of the PCB top layer 1, the clearance area is grounded, a microphone 5 is arranged on the PCB bottom layer 2, the microphone 5 is correspondingly welded on a bonding pad of the microphone 5 arranged on the PCB bottom layer 2, the microphone 5 is located below the clearance area on one side of the grounding elastic sheet 4, and the microphone 5 is fully paved on the clearance area of the PCB top layer 1.
Therefore, a high-frequency coupling resonance area formed by the coupling groove 7, the microphone 5, the grounding elastic sheet 4, the feeding elastic sheet 3 and the wiring thereof is formed on the small antenna plate, namely, the microphone 5 is used as a part of the coupling area, so that the influence of the microphone 5 on the design performance of the antenna is avoided, and the space is saved.
The PCB edge covering the connecting line of the microphone 5 is arranged on the PCB bottom layer 2, specifically, the PCB edge which is arranged on the other side of the coupling groove 7 relative to the feed spring piece 3 and is grounded is arranged, and the ground on the PCB edge is used for covering the wiring of the microphone 5 between the PCB bottom layer 2 and the PCB top layer 1, so that the interference of the wiring of the microphone 5 on the antenna is reduced.
Because the size of the current mobile terminal is smaller and smaller, the requirement on the integration level of a PCB board is higher and higher, the antenna clearance and the stacking of devices of the mobile terminal are tighter and tighter, in order to reduce the size of an antenna area, a switch elastic sheet 6 is further arranged on the PCB bottom layer 2, the switch elastic sheet 6 is welded on a corresponding bonding pad, the switch elastic sheet 6 is connected to the PCB bottom layer 2 through a connecting wire, and the switch elastic sheet 6 and the feed elastic sheet 3 are arranged at a preset distance, so that the PIFA antenna is formed. Specifically, the distance between the switch elastic sheet 6 and the feed elastic sheet 3 is 10-15 mm.
For a conventional linear inverted F antenna, i.e., an IFA antenna, a radiating element and a ground line of the conventional linear inverted F antenna are thin conductor lines, so that an equivalent radio frequency distributed inductance is large, and a distributed capacitance is small, so that a frequency band of the IFA antenna is usually less than one percent of a center frequency. The thin conducting wire of the IFA antenna is replaced by a metal sheet with a certain width, so that distributed capacitance is increased, distributed inductance is reduced, a plane part is equivalent to the parallel connection of the impedances of a plurality of linear antennas, and therefore, the plane type antenna is lower than the input impedance of the linear antennas, broadband resonance characteristics are generated, and the bandwidth of the antenna is increased.
The switch elastic sheet 6 and the feed elastic sheet 3 are both rectangular microstrip antenna radiation patches, the PCB coupling antenna structure is a resonant antenna which is placed above the ground and comprises a grounding elastic sheet 4, and due to the action of the grounding elastic sheet 4, the resonance length of the antenna is shortened from half wavelength to quarter wavelength, so that the physical size of the traditional antenna structure is reduced.
In order to ensure that the resonance length of the antenna is a quarter wavelength, the circumference of the high-frequency coupling resonance circuit surrounded by the high-frequency coupling resonance region, namely the feeding spring 3, the grounding spring 4, the coupling slot 7 and the microphone 5, is set to be a length which enables the high-frequency coupling resonance to be a quarter wavelength.
Because the internal device setting of the current mobile terminal has no uniform standard, the internal device position setting of each product is different, and therefore the antenna length is possibly longer or shorter. Because the feeder line that feed shell fragment 3 and PCB top layer 1 are connected is regarded as a part of the high-frequency coupling resonance circuit, when PCB design, through controlling the interval between feeder line of coupling slot 7 and feed shell fragment 3, realize the resonance fine setting. For example, the resonance length can be adjusted by adjusting the distance between the feed spring 3 and the microphone 5 through the wiring above the grounding spring 4, or by controlling the wiring distance between the coupling groove 7 and the connecting line of the feed spring 3. In a specific embodiment, the circumference of the coupling slot 7 is preferably 18-20 mm, and the length of the feeder line of the feeding spring 3 is adjusted according to actual needs, preferably 2.2-2.4 mm.
The PCB top layer 1 is also provided with a radio frequency connector 9 and an antenna matching module 8, the antenna matching module 8 is connected between the radio frequency connector 9 and the feeding elastic sheet 3, the antenna matching module 8 is used for optimizing the PIFA antenna, and the radio frequency connector 9 is connected with the antenna main body through the antenna matching module 8. The top layer 1 of the PCB is provided with pads for the radio frequency connector 9.
Specifically, the antenna matching module 8 is connected with the feed spring 3 and the radio frequency connector 9 through a feed line.
Space compression in mobile terminals is currently getting smaller and smaller, and therefore the performance of the antenna must be sacrificed. The average efficiency of the conventional external antenna is over 50%, while the current mobile terminal is usually an internal antenna, and the internal antenna efficiency is usually less than 40%. Therefore, in order to efficiently utilize the wireless transmission power, an antenna matching circuit connected with the feed spring is arranged in the top layer of the PCB, so that the impedance of the antenna is matched, and the reflection loss caused by impedance adaptation is reduced.
In a further embodiment, the antenna matching circuit is not arranged, and the flexible circuit board is adopted to replace the printed circuit board, so that the position of the feed spring plate is adjusted, and the antenna optimization is completed.
The embodiment of the invention also provides a mobile terminal, which comprises the PCB coupling antenna structure; as described above.
In summary, the PIFA antenna is formed by the feeding spring and the switch spring, the microphone is used as a part of antenna resonance, and the microphone ground and the antenna spring form a high-frequency coupling resonance frequency, so that the integration level of the PCB is improved, the influence of the microphone on the antenna performance is reduced, the distance between the coupling slot and the antenna of the feeding spring is controlled, or the coupling resonance frequency is adjusted by extending the antenna of the feeding spring.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. A PCB coupling antenna structure, includes the antenna platelet, characterized by: the antenna small plate comprises a PCB bottom layer and a PCB top layer arranged at the upper end of the PCB bottom layer, a grounding elastic sheet, a feed elastic sheet arranged side by side with the grounding elastic sheet and a coupling groove adjacent to one side of the grounding elastic sheet are arranged on the PCB top layer, a microphone is arranged on the PCB bottom layer, and the microphone is arranged below a clearance area at one side of the grounding elastic sheet;
a design gap for resonance is reserved between the feed spring plate and the grounding spring plate;
the clearance area is arranged on one side of the PCB top layer positioned on the grounding elastic sheet, the clearance area is grounded, and the microphone arranged on the PCB bottom layer is fully paved at the clearance area corresponding to the PCB top layer;
the circumference of the high-frequency coupling resonance loop is set to be the length which enables the high-frequency coupling resonance to be in a quarter wavelength, and the microphone is used as a part of the high-frequency coupling resonance loop, so that the influence of the microphone on an antenna is avoided;
the PCB bottom layer is provided with a PCB edge covering the microphone connecting line, the PCB edge is grounded and is arranged at the other side of the coupling groove relative to the feed elastic sheet, and the ground at the PCB edge is used for covering the microphone
The wiring between the bottom layer of the PCB and the top layer of the PCB reduces the influence of the wiring of the microphone on the antenna.
2. The PCB coupled antenna structure of claim 1, wherein: the feed spring plate is connected to the bottom layer of the PCB through a feed line, and resonance is adjusted by controlling the coupling groove and the feed line of the feed spring plate.
3. The PCB coupled antenna structure of claim 2, wherein: the circumference of the coupling groove is 18-20 mm.
4. The PCB coupled antenna structure of claim 1, wherein: still be provided with radio frequency connector and antenna matching module on the PCB top layer, antenna matching module connect in between radio frequency connector and the ground shell fragment of presenting.
5. The PCB coupled antenna structure of claim 4, wherein: the antenna matching module is connected with the feed spring plate and the radio frequency connector through a feeder line.
6. The PCB coupled antenna structure of claim 1, wherein: the PIFA antenna comprises a PCB bottom layer, a feeding spring piece and a switch spring piece, wherein the PCB bottom layer is also provided with the switch spring piece, the switch spring piece is connected to the PCB bottom layer through a connecting wire, and the switch spring piece and the feeding spring piece are separated by a preset distance to form the PIFA antenna.
7. The PCB coupled antenna structure of claim 6, wherein: the distance between the switch elastic sheet and the feed elastic sheet is 10-15 mm.
8. A mobile terminal is characterized in that: comprising a PCB-coupled antenna structure as claimed in claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811389410.4A CN109586019B (en) | 2018-11-21 | 2018-11-21 | PCB coupling antenna structure and mobile terminal thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811389410.4A CN109586019B (en) | 2018-11-21 | 2018-11-21 | PCB coupling antenna structure and mobile terminal thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109586019A CN109586019A (en) | 2019-04-05 |
| CN109586019B true CN109586019B (en) | 2020-08-11 |
Family
ID=65923545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811389410.4A Active CN109586019B (en) | 2018-11-21 | 2018-11-21 | PCB coupling antenna structure and mobile terminal thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109586019B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023033464A1 (en) * | 2021-09-03 | 2023-03-09 | 삼성전자 주식회사 | Electronic device comprising antenna and microphone |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029746B (en) * | 2019-12-24 | 2022-01-21 | 华勤技术股份有限公司 | Antenna assembly and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203826552U (en) * | 2014-04-24 | 2014-09-10 | 王洪洋 | Planar inverted-F slot antenna |
| CN206727217U (en) * | 2017-04-21 | 2017-12-08 | 惠州Tcl移动通信有限公司 | Antenna structure and mobile terminal |
| CN107528937A (en) * | 2017-07-24 | 2017-12-29 | 捷开通讯(深圳)有限公司 | A kind of mobile communication equipment and its antenna |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI118402B (en) * | 2001-06-29 | 2007-10-31 | Pulse Finland Oy | Integrated radio telephone construction |
| JP2010010879A (en) * | 2008-06-25 | 2010-01-14 | Panasonic Corp | Antenna device and electronic apparatus using the same |
| CN201294259Y (en) * | 2008-07-22 | 2009-08-19 | 比亚迪股份有限公司 | Built-in double-frequency mobile phone antenna |
| CN102694242A (en) * | 2012-06-08 | 2012-09-26 | 惠州硕贝德无线科技股份有限公司 | 3G (third-generation) antenna of full-screen intelligent mobile phone and design method of 3G antenna |
| CN202695703U (en) * | 2012-06-29 | 2013-01-23 | 加利电子(无锡)有限公司 | Bijection-module wideband mobile phone antenna of integrated speaker |
| CN104836023A (en) * | 2015-04-08 | 2015-08-12 | 歌尔声学股份有限公司 | Antenna system |
| CN205050982U (en) * | 2015-07-16 | 2016-02-24 | 深圳天珑无线科技有限公司 | Antenna communication system and electronic equipment |
| CN205725930U (en) * | 2016-06-23 | 2016-11-23 | 重庆蓝岸通讯技术有限公司 | Antenna integrated and support bracket fastened mobile phone drain pan |
-
2018
- 2018-11-21 CN CN201811389410.4A patent/CN109586019B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203826552U (en) * | 2014-04-24 | 2014-09-10 | 王洪洋 | Planar inverted-F slot antenna |
| CN206727217U (en) * | 2017-04-21 | 2017-12-08 | 惠州Tcl移动通信有限公司 | Antenna structure and mobile terminal |
| CN107528937A (en) * | 2017-07-24 | 2017-12-29 | 捷开通讯(深圳)有限公司 | A kind of mobile communication equipment and its antenna |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023033464A1 (en) * | 2021-09-03 | 2023-03-09 | 삼성전자 주식회사 | Electronic device comprising antenna and microphone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109586019A (en) | 2019-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202025847U (en) | Indirect feed antenna | |
| CN101106211B (en) | Dual loop multi-frequency antenna | |
| US9419344B2 (en) | Mountable antenna elements for dual band antenna | |
| KR100467569B1 (en) | Microstrip patch antenna for transmitting and receiving | |
| US5420599A (en) | Antenna apparatus | |
| KR100980774B1 (en) | Internal mimo antenna having isolation aid | |
| US10965018B2 (en) | Antenna device | |
| KR102432311B1 (en) | Antenna module, communication device mounted thereon, and circuit board | |
| TWI504064B (en) | Integrated multi - frequency antenna | |
| TW201914102A (en) | Mobile electronic device | |
| CN107645054B (en) | Antenna structure and wireless communication device with same | |
| CN109586019B (en) | PCB coupling antenna structure and mobile terminal thereof | |
| CN112825386B (en) | Antenna structure and wireless communication device with same | |
| US7598912B2 (en) | Planar antenna structure | |
| JP3467164B2 (en) | Inverted F antenna | |
| US20080094303A1 (en) | Planer inverted-F antenna device | |
| CN112952362A (en) | Integrated antenna and electronic device | |
| CN107394384B (en) | Printed slot inverted F antenna and Bluetooth communication device | |
| US20040125033A1 (en) | Dual-band antenna having high horizontal sensitivity | |
| TWI779400B (en) | Wireless communication apparatus and printed dual band antenna thereof | |
| KR101491232B1 (en) | Antenna apparatus and feeding structure thereof | |
| CN108459660B (en) | Electronic device | |
| CN112635982B (en) | Short-circuit coplanar waveguide-fed dual-polarized broadband antenna | |
| TW201448356A (en) | Antenna structure and wireless communication device using same | |
| CN111082221B (en) | Loop antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230731 Address after: No. 138, Taodu Road, Dingshu Town, Yixing City, Wuxi City, Jiangsu Province, 214200 Patentee after: JIANGSU HENGXIN TECHNOLOGY Co.,Ltd. Patentee after: JIANGSU HENGXIN WIRELESS TECHNOLOGY Co.,Ltd. Address before: 516006 Zhongkai hi tech Zone, Huizhou, Guangdong, 86 Chang seven Road West Patentee before: HUIZHOU TCL MOBILE COMMUNICATION Co.,Ltd. |