CN101958723B - Mobile terminal and antenna matching method thereof - Google Patents
Mobile terminal and antenna matching method thereof Download PDFInfo
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- CN101958723B CN101958723B CN201010285301.5A CN201010285301A CN101958723B CN 101958723 B CN101958723 B CN 101958723B CN 201010285301 A CN201010285301 A CN 201010285301A CN 101958723 B CN101958723 B CN 101958723B
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Abstract
The invention relates to the field of mobile communication and discloses a mobile terminal and an antenna matching method thereof. In the invention, an antenna matching circuit is positioned on a mobile phone antenna, and the antenna matching circuit and the mobile phone antenna are integrally designed, so that the antenna can achieve the effect that the impedance of an effective frequency channel is approximate to 50 ohms at a feedback point connected with a circuit board of the mobile terminal. The mobile terminal and the antenna matching method thereof provided by the invention have the advantage of changing the condition that the traditional matching circuit is arranged on the circuit board of the mobile terminal and that new circuits are required to be designed to match the antenna of each frequency channel. Thus, the consistency of the batch production of the antenna and the matching circuit is well guaranteed, the development speed and cost of the circuit board of the mobile terminal can be shortened, and the management and control difficulties of the circuit board material are reduced.
Description
Technical field
The present invention relates to moving communicating field, in particular a kind of mobile terminal and aerial matching method thereof.
Background technology
Along with being showing improvement or progress day by day of personal communication and mobile communication technology, in order to tackle the demand in market, mobile terminal is more and more to miniaturization, and linearize in many days develops.Mobile terminal of today not only has the antenna of supporting cellular frequency, supports in addition the various antennas of mobile TV, bluetooth, WLAN, GPS etc. a series of frequencies.Multiple antenna need to rationally coexist, ensure performance separately.And antenna is often because the various application functions of mobile terminal cause performance to reduce as camera, loud speaker etc. tie up its useful space.These have all proposed more and more higher requirement to the Antenna Design of mobile terminal.
Antenna is complex devices, is embedded in antenna in mobile terminal no exception, because the radio frequency transceiver of mobile terminal designs for 50 ohmages, so its antenna preferably can present 50 ohmages in whole frequency range.But in fact, this is difficult to accomplish because mobile terminal antenna innately have the beamwidth of antenna narrow, mate the features such as bad and radiation efficiency is low.Therefore, set up efficient match circuit in radio-frequency (RF) transceiver between antenna, wide and radiance reaches certain standard in useful frequency range inner radiation belt to make antenna, is very important.
The mobile terminal of prior art, is all a set of antenna and the mainboard for normal radiation index, and same circuit board can not connect the dissimilar antenna of button, reaches different radiance demands.In order to meet this other index, generally can be for mobile terminal redesigns and revise its antenna-matching circuit, and match circuit is positioned on mobile terminal circuit plate.Need to again drop into research and development strength like this, increase human cost, also increase difficulty to material logistics
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, a kind of mobile terminal and aerial matching method thereof are provided, it needs to adjust the antenna-matching circuit being placed on FPC antenna, just can meet multiple different radiance demand, greatly simplify development process, reduced handling of goods and materials difficulty, saved development cost and development time.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A kind of mobile terminal, comprises FPC antenna, is arranged on aerial radiation main body and antenna shell foot on described FPC antenna, wherein, also comprises that one is connected between described aerial radiation main body and antenna shell foot and adjustable antenna-matching circuit, for antenna is mated; Described antenna-matching circuit and described FPC antenna are wholely set;
Wherein, also comprise the antenna feed point being connected with described antenna shell foot being arranged on circuit board of mobile phone, described antenna feed point is directly connected with the radio frequency transceiver on circuit board of mobile phone; On described circuit board of mobile phone, leave feedback point, the antenna being completed by debugging is directly connect button and is presented on point by antenna shrapnel place; Described antenna-matching circuit, for adjusting the value that antenna-matching circuit respectively mates device, adjusting described aerial radiation main body is 50 ohm with being connected impedance between the antenna shell foot of circuit board of mobile phone antenna feed point, and the performance of described FPC antenna meets the normal radiation index of standing-wave ratio below 3: 1.
Described mobile terminal wherein, is provided with the pad for the match circuit coupling device that fixes up an aerial wire on described FPC antenna.
Described mobile terminal, wherein, described pad is between the antenna shell foot and aerial radiation main body of described FPC antenna.
Described mobile terminal, wherein, described antenna-matching circuit is double L-shaped match circuit, T-shaped match circuit or π type match circuit.
A kind of mobile terminal antenna matching process, wherein, comprises the following steps:
A, aerial radiation main body is set on FPC antenna, with the antenna shell foot that is provided for contacting with the antenna feed point on circuit board of mobile phone;
B, on FPC antenna, also arrange and be connected between described aerial radiation main body and antenna shell foot and adjustable antenna-matching circuit, so that antenna is mated; And described antenna-matching circuit and described FPC antenna are wholely set; Wherein, described antenna-matching circuit respectively mates the value of device by adjusting described antenna-matching circuit, adjusting described aerial radiation main body is 50 ohm with being connected impedance between the antenna shell foot of circuit board of mobile phone antenna feed point, and the performance of described FPC antenna meets the normal radiation index of standing-wave ratio below 3: 1;
C, by the FPC antenna of adjustable antenna match circuit is set between described aerial radiation main body and antenna shell foot, be directly connected with radio frequency transceiver by the antenna feed point on circuit board of mobile phone; Wherein, leave feedback point on described circuit board of mobile phone, the antenna being completed by debugging is directly connect button and is presented on point by antenna shrapnel place.
Mobile terminal provided by the invention and aerial matching method thereof.Antenna-matching circuit is placed on antenna for mobile phone, carries out integrated design for both, make antenna just can reach effective frequency range at the feedback point place being connected with mobile terminal circuit plate to approach the effect of 50 ohmages.Change match circuit in the past and be placed on mobile terminal circuit plate, need to redesign the antenna that circuit coordinates each frequency range.Like this, both can ensure preferably the consistency of antenna and match circuit batch production, can shorten again development time and the development cost of mobile terminal circuit plate, reduce the management and control difficulty of circuit board materials.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of typical antenna-matching circuit of prior art on circuit board;
Fig. 2 is the FPC Principle of Antenna block diagram of embodiment of the present invention mobile terminal;
Fig. 3 is the circuit board of mobile phone structural representation of embodiment of the present invention mobile terminal;
Fig. 4 is the FPC antenna one particular circuit configurations schematic diagram of embodiment of the present invention mobile terminal;
Fig. 5 is the mobile terminal antenna matching process flow chart of the embodiment of the present invention.
Embodiment
For making object of the present invention, technical scheme and advantage clearer, clear and definite, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Antenna is complex devices, is embedded in antenna in mobile terminal no exception, because the radio frequency transceiver of mobile terminal designs for 50 ohmages, so its antenna preferably can present 50 ohmages in whole frequency range.But in fact, this is difficult to accomplish because mobile terminal antenna innately have the beamwidth of antenna narrow, mate the features such as bad and radiation efficiency is low.Therefore, set up efficient match circuit in radio-frequency (RF) transceiver between antenna, wide and radiance reaches certain standard in useful frequency range inner radiation belt to make antenna.The HAC index of aerial radiation is a kind of standard wherein.
Fig. 1 is the structural representation of a kind of typical antenna-matching circuit of prior art on circuit board 10.Wherein, as shown in Figure 1,100 is antenna feed point on circuit board of mobile phone 10, and 200 is the match circuit on circuit board of mobile phone: its coupling device comprises the first resistance 701, the second resistance 702, the 3rd resistance 703 and the 4th resistance 704.300 is radio-frequency (RF) transceiver.
Double L-shaped or T-shaped, π type that antenna-matching circuit is generally.Series connection device (the 4th resistance 704 as shown in Figure 1 and the second resistance 702) is connected between antenna and radio-frequency (RF) transceiver, device in parallel one end matching connection circuit, one end ground connection.Antenna is connected in antenna feed point 100 with circuit board.In actual application, in certain frequency range, by adjusting each device (the first resistance 701, the second resistance 702, the 3rd resistance 703 and the 4th resistance 704 as shown in Figure 1) in match circuit, 50 ohmages that realize antenna impedance and radio-frequency (RF) transceiver match, to meet the demand of aerial radiation HAC index.
The effect of antenna-matching circuit, is the coupling by antenna being carried out to impedance etc., ensures the energy that antenna reception arrives, and can must be transferred to greatest extent the back-end circuit such as radio-frequency (RF) transceiver and process.If antenna-matching circuit and antenna match effect are bad is mismatch, at transmitting terminal, the signal that is sent to antenna will be reflected back toward transmitter, produces reflected wave in feeder line so, reflected wave arrival transmitter finally can change heat exhaustion into and fall, and can burn out the power amplifier of transmitter when serious.
On the other hand, mismatch also can cause power amplifier to be operated in the state that its efficiency is very low, and its required electric current is increased, and heating increases.This also may cause power amplifier to burn out.At receiving terminal, also can cause that signal receives because of mismatch bad, the receptivity of antenna is weakened, and the thresholding of minimum received signal strength is elevated, and the performance of whole system is caused to deterioration.
Therefore, the embodiment of the present invention provides a kind of mobile terminal, mainly to adopt adjustable antenna-matching circuit and aerial radiation main body to be wholely set on FPC (Flexible print circuit flexible printed circuit) antenna, and by regulating described antenna-matching circuit can make described FPC antenna meet many indexes requirement.
As shown in Figure 2, the mobile terminal of the present embodiment comprises FPC antenna 900, is arranged on aerial radiation main body 920 and antenna shell foot 910 on described FPC antenna 900, and described antenna shell foot 910 is for being connected with antenna feed point 810 contacts on circuit board of mobile phone 800.As shown in Figure 3, the mobile device described in the present embodiment, also comprises the antenna feed point 810 that can be connected with described antenna shell foot 910 being arranged on circuit board of mobile phone 800, and described antenna feed point 810 is directly connected with the radio frequency transceiver 820 on circuit board of mobile phone 800.
As shown in Figure 2, the mobile device of the present embodiment, also comprises that one is connected to the antenna-matching circuit 930 between described aerial radiation main body 920 and antenna shell foot 910, and described antenna-matching circuit 930 is wholely set with described FPC antenna 900.
In this enforcement, described antenna-matching circuit 930 is set to adjustable, for antenna is mated, so that FPC antenna of the present invention can be by regulating described match circuit 930 can meet various different radiance demands, the value of for example respectively mating device by adjusting antenna-matching circuit, making aerial radiation main body is 50 ohm with being connected impedance between the antenna shell foot of circuit board of mobile phone antenna feed point, make the performance of FPC antenna of the present invention meet normal radiation index, VSWR (standing-wave ratio) is below 3: 1.
VSWR is translated as voltage standing wave ratio (Voltage Standing Wave Ratio), is generally called for short standing-wave ratio.
As shown in Figure 4, specifically in the time realizing, the choosing value of the each matching element of described antenna-matching circuit 930 (as the coupling device 1 in Fig. 4, coupling device 2, coupling device 3 and coupling device 4) is first adjusted to, the aerial radiation main body 920 that makes embodiment of the present invention FPC antenna be connected the impedance that is in useful frequency range between the antenna shell foot 910 of circuit board of mobile phone 800 antenna feed point 810 and approach 50 ohm (referring to Fig. 2 and Fig. 3), VSWR (standing-wave ratio), below 3: 1, makes antenna performance meet normal radiation index.
Wherein, as shown in Figure 4, described the first match circuit can be for being double L-shaped match circuit, T-shaped match circuit or π type match circuit; Described the second match circuit is double L-shaped match circuit, T-shaped match circuit or π type match circuit.
And while needing full other different radiance demands, only need regulate again in addition described match circuit 930 just can realize.
In preferably implementing, referring to Fig. 4, at the beginning of antenna mould arranges, can on described FPC antenna, be provided with the pad for the match circuit coupling device that fixes up an aerial wire.Described pad is between the antenna shell foot and aerial radiation main body of described FPC antenna.
Therefore, the mobile terminal of the embodiment of the present invention, only need to adjust the antenna-matching circuit being placed on FPC antenna, just can meet multiple different radiance demand, greatly simplify development process, reduce handling of goods and materials difficulty, saved development cost and development time, provided users with the convenient.
Based on the mobile terminal of above-described embodiment, the embodiment of the present invention also provides a kind of mobile terminal antenna matching process, as shown in Figure 5, comprises the following steps:
Step S510, aerial radiation main body 920 is set on FPC antenna 900, with the antenna shell foot 910 that is provided for contacting with the antenna feed point 810 on circuit board of mobile phone 800; Referring to Fig. 2 and Fig. 3.
Step S520, on FPC antenna 900, also arrange and be connected between described aerial radiation main body 920 and antenna shell foot 910 and adjustable antenna-matching circuit 930, so that antenna is mated; And described antenna-matching circuit 930 is wholely set with described FPC antenna 900.
Step S530, by the FPC antenna 900 of adjustable antenna match circuit 930 is set between described aerial radiation main body 920 and antenna shell foot 910, be directly connected with radio frequency transceiver 820 by the antenna feed point 910 on circuit board of mobile phone 800.
The mobile terminal antenna matching process of the embodiment of the present invention, by regulating antenna-matching circuit, just can meet multiple different radiance demand, as follows when specific implementation:
1. at the beginning of FPC antenna Design of Dies, can be designed with the pad for antenna match device, referring to figure, make the device such as capacitor and inductor resistance of each coupling device of antenna-matching circuit can be directly welded in (as the coupling device 1 in Fig. 4, coupling device 2, coupling device 3 and coupling device 4) on antenna mould.This welding position is between described antenna shell foot and aerial radiation main body.
2. then each antenna match device is welded on FPC antenna, by antenna-matching circuit and the main body integrated design of aerial radiation.
3. can adjust at first the device value of antenna match, make aerial radiation main body 920 and be connected the impedance that is in useful frequency range between the antenna shell foot 910 of circuit board of mobile phone 800 antenna feed point 810 and approach 50 ohm (referring to Fig. 2 and Fig. 3), VSWR (standing-wave ratio), below 3: 1, makes antenna performance meet normal radiation index.
On 4.PCB circuit board of mobile phone, leave feedback point, the antenna being completed by debugging is directly connect button and is presented on point by antenna shrapnel place.
And in the time needing full other different radiance demands, only need to regulate again in addition described match circuit 930 just can realize to suitable impedance.Like this, same circuit board can connect the dissimilar antenna of button, reaches different radiance demands, and does not need to change any device.Greatly simplify development process, reduced handling of goods and materials difficulty, saved development cost and development time.
In sum, mobile terminal provided by the invention and aerial matching method thereof.Antenna-matching circuit is placed on antenna for mobile phone, carries out integrated design for both, make antenna just can reach effective frequency range at the feedback point place being connected with mobile terminal circuit plate to approach the effect of 50 ohmages.Change match circuit in the past and be placed on mobile terminal circuit plate, need to redesign the antenna that circuit coordinates each frequency range.Like this, both can ensure preferably the consistency of antenna and match circuit batch production, can shorten again development time and the development cost of mobile terminal circuit plate, reduce the management and control difficulty of circuit board materials.Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (3)
1. a mobile terminal, comprise FPC antenna, be arranged on aerial radiation main body and antenna shell foot on described FPC antenna, it is characterized in that, also comprise that one is connected between described aerial radiation main body and antenna shell foot and adjustable antenna-matching circuit, for antenna is mated; Described antenna-matching circuit and described FPC antenna are wholely set;
Wherein, also comprise the antenna feed point being connected with described antenna shell foot being arranged on circuit board of mobile phone, described antenna feed point is directly connected with the radio frequency transceiver on circuit board of mobile phone;
On described circuit board of mobile phone, leave feedback point, the antenna being completed by debugging is directly connect and is buckled on feedback point by antenna shrapnel place;
Described antenna-matching circuit is set to adjustable, for antenna is mated, make FPC antenna by regulating described match circuit to meet various different radiance demands, the value of respectively mating device to adjust antenna-matching circuit, adjusting described aerial radiation main body is 50 ohm with being connected the impedance that is in effective frequency range between the antenna shell foot of circuit board of mobile phone antenna feed point, and the performance of described FPC antenna meets the normal radiation index of standing-wave ratio below 3:1;
On described FPC antenna, be provided with the pad for the match circuit coupling device that fixes up an aerial wire, described pad is between the antenna shell foot and aerial radiation main body of described FPC antenna.
2. mobile terminal according to claim 1, is characterized in that, described antenna-matching circuit is double L-shaped match circuit, T-shaped match circuit or π type match circuit.
3. a mobile terminal antenna matching process, is characterized in that, comprises the following steps:
A, aerial radiation main body is set on FPC antenna, with the antenna shell foot that is provided for contacting with the antenna feed point on circuit board of mobile phone;
B, on FPC antenna, also arrange and be connected between described aerial radiation main body and antenna shell foot and adjustable antenna-matching circuit, so that antenna is mated; And described antenna-matching circuit and described FPC antenna are wholely set;
Wherein, described antenna-matching circuit is set to adjustable, for antenna is mated, make FPC antenna by regulating described match circuit to meet various different radiance demands, respectively to mate the value of device by adjusting described antenna-matching circuit, adjusting described aerial radiation main body is 50 ohm with being connected the impedance that is in effective frequency range between the antenna shell foot of circuit board of mobile phone antenna feed point, and the performance of described FPC antenna meets the normal radiation index of standing-wave ratio below 3:1;
C, by the FPC antenna of adjustable antenna match circuit is set between described aerial radiation main body and antenna shell foot, be directly connected with radio frequency transceiver by the antenna feed point on circuit board of mobile phone;
Wherein, leave feedback point on described circuit board of mobile phone, the antenna being completed by debugging is directly connect button and is presented on point by antenna shrapnel place.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010285301.5A CN101958723B (en) | 2010-09-17 | 2010-09-17 | Mobile terminal and antenna matching method thereof |
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| CN201010285301.5A CN101958723B (en) | 2010-09-17 | 2010-09-17 | Mobile terminal and antenna matching method thereof |
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| CN101958723B true CN101958723B (en) | 2014-06-25 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI479809B (en) * | 2013-02-04 | 2015-04-01 | Wistron Corp | Mobile communication device |
| CN103647574A (en) * | 2013-12-04 | 2014-03-19 | 桂林市利通电子科技有限责任公司 | Universal remote-transmission wireless electronic module |
| CN106505323A (en) * | 2016-12-08 | 2017-03-15 | 上海煜鹏通讯电子股份有限公司 | Low frequency broadband mobile terminal antenna is realized using double resonance |
| CN109149137A (en) * | 2018-09-11 | 2019-01-04 | 深圳市思讯通信技术有限公司 | A kind of built-in antenna mould group and automatic navigator |
| CN112582795B (en) * | 2019-09-30 | 2023-05-09 | 北京小米移动软件有限公司 | Antenna structure and electronic equipment |
| CN111262046B (en) * | 2020-01-20 | 2021-06-15 | 惠州Tcl移动通信有限公司 | Antenna circuit and mobile terminal |
| CN111211421A (en) * | 2020-03-19 | 2020-05-29 | 惠州Tcl移动通信有限公司 | Antenna tuning circuit and mobile terminal |
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Effective date of registration: 20201225 Address after: 276599 dachangyuan village, sangyuan Town, Ju county, Rizhao City, Shandong Province Patentee after: RIZHAO LIYING MACHINERY MANUFACTURING Co.,Ltd. Address before: 510000 No. 106 Fengze East Road, Nansha District, Guangzhou City, Guangdong Province Patentee before: Guangzhou shengxia Intellectual Property Operation Co.,Ltd. Effective date of registration: 20201225 Address after: 510000 No. 106 Fengze East Road, Nansha District, Guangzhou City, Guangdong Province Patentee after: Guangzhou shengxia Intellectual Property Operation Co.,Ltd. Address before: 516006 TCL mobile communication company, No. 23 residential district, Huizhou hi tech Development Zone, Huicheng District, Guangdong Patentee before: HUIZHOU TCL MOBILE COMMUNICATION Co.,Ltd. |