CN102761640A - Method for optimizing indexes of antenna and mobile terminal - Google Patents

Method for optimizing indexes of antenna and mobile terminal Download PDF

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Publication number
CN102761640A
CN102761640A CN201210228984XA CN201210228984A CN102761640A CN 102761640 A CN102761640 A CN 102761640A CN 201210228984X A CN201210228984X A CN 201210228984XA CN 201210228984 A CN201210228984 A CN 201210228984A CN 102761640 A CN102761640 A CN 102761640A
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China
Prior art keywords
antenna
matching circuit
distance
capacitive proximity
duplexer
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Pending
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CN201210228984XA
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Chinese (zh)
Inventor
薛元松
张菊香
邵永平
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ZTE Corp
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ZTE Corp
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Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Priority to CN201210228984XA priority Critical patent/CN102761640A/en
Publication of CN102761640A publication Critical patent/CN102761640A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a method for optimizing indexes of an antenna and a mobile terminal. The mobile terminal comprises a main chip, an antenna switch, a first antenna matching circuit, a second antenna matching circuit and an antenna, wherein the first antenna matching circuit adopts a matching circuit aiming at free space; the second antenna matching circuit adopts a matching circuit aiming at human head, human hand and human body ratio absorbance indexes; the mobile terminal also comprises a capacitive proximity sensor and a corresponding sensor chip; the capacitive proximity sensor is used for sending capacitance change information produced by distance change to the sensor chip when detecting that the distance between the capacitive proximity sensor and a conductor is changed; the sensor chip is used for processing the received capacitance change information, so as to obtain the distance between the capacitive proximity sensor and the conductor, and then judging whether the distance is smaller than a preset distance value; and if the distance is smaller than the preset distance value, the sensor chip sends control commands to the main chip, wherein the control commands carries with control information indicating that the antenna switch is switched to the second antenna matching circuit.

Description

A kind of method and portable terminal of optimizing the antenna index
Technical field
The present invention relates to the terminal antenna field, relate in particular to a kind of method and portable terminal of optimizing the antenna index.
Background technology
When a mobile phone products used before listing and by the user, antenna performance and electromagnetic radiation all were important indicators to the influence of human body.OTA (the Over The Air Technology that comprises personal space about the test of antenna for mobile phone; The air download technology) index; This OTA index comprises: TRP (Total Radiated Power; Isotropically radiated power), TIS (Total Isotropic Sensitivity, omnidirectional's receiving sensitivity) and SAR (Specific Absorption Rate, human body specific absorption rate); Add TRP and TIS test behind the number of people and the hand model simultaneously in addition.Passed through these tests, shown that just mobile phone products can guarantee speech quality and adapt to the influence of number of people staff to mobile phone antenna performance in the process that reality is used.
In sum,, number of people staff index request is arranged again, only can't realize the situation that both take into account through single antenna form or antenna match to the existing free space index request of antenna for mobile phone.But actual conditions are that when a antenna of debugging, it does not reach the ability that meets the demands simultaneously when taking into account the index of free space and number of people staff performance and SAR.Usually the way of taking is a debugging coupling, owing to be not same group of coupling to the coupling of free space with to the coupling of number of people staff and SAR, different couplings can not be used simultaneously, so certain difficulty is also arranged when reality is debugged.
Using duplexer control match circuit is method commonly used at present, but how to go the control antenna switch motion, and mode differs.In existent method, duplexer can be because there be the problem that operation is limited or judge by accident in type and mode of operation when carrying out handover operation.Especially to the erroneous judgement of user mode, can cause switching the out of turn of coupling.
Summary of the invention
The object of the present invention is to provide a kind of method and portable terminal of optimizing the antenna index, to overcome the defective that existing switching mode is easy to generate erroneous judgement.
For addressing the above problem, the invention provides a kind of portable terminal, comprising: master chip, duplexer, first antenna-matching circuit, second antenna-matching circuit and antenna; Wherein, first antenna-matching circuit is the match circuit to free space; Second antenna-matching circuit is the match circuit to number of people staff and human body specific absorption rate index; Also comprise: capacitive proximity sensor and corresponding sensor chip:
Said capacitive proximity sensor is used for when detecting self and distance between conductors and change, will sending to said sensor chip by the capacitance variations information that this variable in distance produced;
Said sensor chip is used for the said capacitance variations information that receives is handled, and obtains the distance between said capacitive proximity sensor and said conductor, judges that then whether this distance is smaller or equal to preset distance value; If, wherein carry and be used to indicate said duplexer to switch to the control information of said second antenna-matching circuit then to said master chip transmitting control commands.
Further,
Said sensor chip also is used for when judging said distance greater than said preset distance value, to said master chip transmitting control commands, wherein carries and is used to indicate said duplexer to switch to the control information of said first antenna-matching circuit.
Further,
Said capacitive proximity sensor and said antenna are set together.
Correspondingly, the present invention also provides a kind of method of optimizing the antenna index, is applied to comprise on the above-mentioned portable terminal:
Capacitive proximity sensor will send to sensor chip by the capacitance variations information that this variable in distance produced when detecting self and distance between conductors and change;
Sensor chip is handled the capacitance variations information that receives, and obtains the distance between said capacitive proximity sensor and said conductor, judges that then whether this distance is smaller or equal to preset distance value; If, wherein carry and be used to indicate duplexer to switch to first control information of second antenna-matching circuit then to the master chip transmitting control commands; Wherein, said second antenna-matching circuit is the match circuit to number of people staff and human body specific absorption rate index;
The said control command that said master chip will receive sends to said duplexer;
Said duplexer switches to said second antenna-matching circuit accordingly according to said first control information of carrying in the said control command that receives.
Further, said method also can comprise:
Said sensor chip to said master chip transmitting control commands, wherein carries and is used to indicate said duplexer to switch to second control information of said first antenna-matching circuit when judging said distance greater than preset distance value; Wherein, said first antenna-matching circuit is the match circuit to free space;
Said duplexer switches to said first antenna-matching circuit accordingly according to said second control information of carrying in the said control command that receives.
After adopting the present invention, make antenna for mobile phone also can satisfy the requirement of the number of people staff index of correlation when can satisfy the requirement of free space, also play a role on this external SAR of improvement index.The present invention also can solve when antenna for mobile phone need be tested number of people SAR and health SAR, and the conducted power that does not reduce mobile phone can satisfy the substandard technical problem of number of people staff OTA.
Description of drawings
Fig. 1 is the structural representation of portable terminal in the embodiment of the invention;
Fig. 2 (a) and Fig. 2 (b) are respectively the front schematic view and the schematic rear view of portable terminal in the embodiment of the invention;
Fig. 3 is for placing the inner printed circuit board of portable terminal and going up and the relevant components and parts sketch map of transducer control antenna coupling in the embodiment of the invention;
Fig. 4 is that transducer receives signal flow that induced signal and control antenna switch thereof realize the switched antenna match circuit to sketch map in the embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
Usually, comprise in the portable terminal: master chip, duplexer, first antenna-matching circuit, second antenna-matching circuit and antenna.Wherein, master chip is used for to the duplexer transmitting control commands, wherein carries to be used to indicate duplexer to switch to the control information of respective antenna match circuit; Duplexer is used for after receiving above-mentioned control command, carrying out corresponding handover operation according to the control information of wherein carrying; First antenna-matching circuit is the match circuit to free space; Second antenna-matching circuit is the match circuit to number of people staff and SAR index; Antenna is used for the transmitting/receiving wireless signal.
To switch coupling in order judging under which kind of situation, can in portable terminal, to set up capacitive proximity sensor and corresponding sensor chip.Because capacitive proximity sensor can perceive conductor near this equipment through the variation of selfcapacity, therefore in portable terminal, setting up this transducer can effectively judge the approaching of number of people staff.See from the hardware distribution of actual portable terminal; Preferably capacitive proximity sensor and antenna are set together; That is to say from seeing in appearance; Antenna both as the passage of receiving and transmitting signal also as judging the approaching instrument of number of people staff, like this just reduced the waste on the space for the lifting of antenna performance.The problem of using above-mentioned switching matching mode to solve SAR also is more resultful, can decide according to concrete index request and how go the debugging coupling, will cooperate the adjustment of antenna cabling simultaneously.
Particularly; In the present embodiment; As shown in Figure 1, a kind of portable terminal is except that comprising: master chip, duplexer, first antenna-matching circuit, second antenna-matching circuit and the antenna; Also comprise: capacitive proximity sensor and corresponding sensor chip, wherein: capacitive proximity sensor is used for the capacitance variations information that is produced sends to sensor chip because self and distance between conductors change; Sensor chip is handled the capacitance variations information that receives, and obtains the distance between current capacitive proximity sensor and above-mentioned conductor, judges that then whether this distance is less than preset distance value; If, wherein carry and be used to indicate duplexer to switch to the control information of second antenna-matching circuit then to the master chip transmitting control commands; Otherwise,, wherein carry and be used to indicate duplexer to switch to the control information of first antenna-matching circuit to the master chip transmitting control commands.
Shown in Fig. 2 (a) and Fig. 2 (b), portable terminal 11 comprises fore shell 13 and back cover 14, and LCD12 is positioned at fore shell 13.Capacitive proximity sensor 16 can place on the back cover 14.The capacitive proximity sensor 16 that present embodiment is related can be independently, also can be set together with antenna 15.
As shown in Figure 3, place the devices such as chip, inductance, electric capacity that distributing on the inner PCB (Printed Circuit Board, printed circuit board) 21 of portable terminal.Capacitive proximity sensor needs transducer feedback point 23, and capacitive proximity sensor was accomplished with being connected through transducer feedback point 23 of sensor chip 22.Transducer feedback point 23 is transferred to sensor chip 22 with the signal of the expression capacitance variations information that capacitive proximity sensor produces.Sensor chip 22 sends to duplexer 27 with the control command that produces through master chip.Duplexer 27 is according to the control information of carrying in the control command that receives; Correspondingly switch to first antenna-matching circuit 24 or second antenna-matching circuit 26; The signal of respective antenna match circuit outputs to antenna feed point 25, is accomplished the transmission of wireless signal by the antenna that links to each other with antenna feed point 25.
As shown in Figure 4, be example with the mobile phone, when number of people staff during near antenna for mobile phone, itself and capacitive proximity sensor produce electric capacity, and capacitive proximity sensor is judged thus has object near mobile phone.The change in voltage that produces feeds back to sensor chip, and sensor chip becomes it into control commands corresponding and passes to the master chip in the mobile phone, thereby the control antenna switch motion switches to first antenna-matching circuit or switches to second antenna-matching circuit.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above is merely the preferred embodiments of the present invention, is not to be used to limit protection scope of the present invention.According to summary of the invention of the present invention; Also other various embodiments can be arranged; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention, and are all within spirit of the present invention and principle; Any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. a portable terminal comprises: master chip, duplexer, first antenna-matching circuit, second antenna-matching circuit and antenna; Wherein, first antenna-matching circuit is the match circuit to free space; Second antenna-matching circuit is the match circuit to number of people staff and human body specific absorption rate index; It is characterized in that, also comprise: capacitive proximity sensor and corresponding sensor chip:
Said capacitive proximity sensor is used for when detecting self and distance between conductors and change, will sending to said sensor chip by the capacitance variations information that this variable in distance produced;
Said sensor chip is used for the said capacitance variations information that receives is handled, and obtains the distance between said capacitive proximity sensor and said conductor, judges that then whether this distance is smaller or equal to preset distance value; If, wherein carry and be used to indicate said duplexer to switch to the control information of said second antenna-matching circuit then to said master chip transmitting control commands.
2. portable terminal as claimed in claim 1 is characterized in that:
Said sensor chip also is used for when judging said distance greater than said preset distance value, to said master chip transmitting control commands, wherein carries and is used to indicate said duplexer to switch to the control information of said first antenna-matching circuit.
3. portable terminal as claimed in claim 1 is characterized in that:
Said capacitive proximity sensor and said antenna are set together.
4. method of optimizing the antenna index is applied to comprise as on any described portable terminal in the claim 1~3:
Capacitive proximity sensor will send to sensor chip by the capacitance variations information that this variable in distance produced when detecting self and distance between conductors and change;
Sensor chip is handled the capacitance variations information that receives, and obtains the distance between said capacitive proximity sensor and said conductor, judges that then whether this distance is smaller or equal to preset distance value; If, wherein carry and be used to indicate duplexer to switch to first control information of second antenna-matching circuit then to the master chip transmitting control commands; Wherein, said second antenna-matching circuit is the match circuit to number of people staff and human body specific absorption rate index;
The said control command that said master chip will receive sends to said duplexer;
Said duplexer switches to said second antenna-matching circuit accordingly according to said first control information of carrying in the said control command that receives.
5. method as claimed in claim 4 is characterized in that, also comprises:
Said sensor chip to said master chip transmitting control commands, wherein carries and is used to indicate said duplexer to switch to second control information of said first antenna-matching circuit when judging said distance greater than preset distance value; Wherein, said first antenna-matching circuit is the match circuit to free space;
Said duplexer switches to said first antenna-matching circuit accordingly according to said second control information of carrying in the said control command that receives.
CN201210228984XA 2012-07-04 2012-07-04 Method for optimizing indexes of antenna and mobile terminal Pending CN102761640A (en)

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Cited By (12)

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CN103067038A (en) * 2013-01-05 2013-04-24 中兴通讯股份有限公司 Mobile terminal and method for reducing specific absorption rate
WO2014161356A1 (en) * 2013-08-19 2014-10-09 中兴通讯股份有限公司 Method of lowering sar, mobile terminal, and computer storage medium
CN104956540A (en) * 2013-01-31 2015-09-30 惠普发展公司,有限责任合伙企业 Integrated antenna and proximity sensor element
CN105554834A (en) * 2015-08-18 2016-05-04 宇龙计算机通信科技(深圳)有限公司 Antenna switching method of user terminal and user terminal
CN105939417A (en) * 2016-06-03 2016-09-14 上海摩软通讯技术有限公司 Mobile terminal and signal transmitting power adjusting method of mobile terminal
CN106461712A (en) * 2014-04-07 2017-02-22 卡文迪什动力有限公司 Head-hand capacitance compensation with digital variable capacitor
WO2018121379A1 (en) * 2016-12-29 2018-07-05 歌尔股份有限公司 Smart watch and antenna signal processing circuit and method thereof
CN111505395A (en) * 2020-04-24 2020-08-07 宁波麦度智联科技股份有限公司 Processing method for giving consideration to OTA and SAR tests
CN112968274A (en) * 2021-02-03 2021-06-15 维沃移动通信有限公司 Electronic device
WO2021197126A1 (en) * 2020-03-30 2021-10-07 维沃移动通信有限公司 Electronic device
CN114221678A (en) * 2022-01-11 2022-03-22 Oppo广东移动通信有限公司 Near field communication chip, wireless communication device, and specific absorption rate detection method
CN114978217A (en) * 2022-04-15 2022-08-30 深圳市中天迅通信技术股份有限公司 Method and system for reducing SAR (synthetic aperture radar) of mobile phone antenna

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WO2013189387A3 (en) * 2013-01-05 2014-02-13 中兴通讯股份有限公司 Mobile terminal and specific absorption rate reduction method
CN103067038A (en) * 2013-01-05 2013-04-24 中兴通讯股份有限公司 Mobile terminal and method for reducing specific absorption rate
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CN104956540B (en) * 2013-01-31 2018-04-06 惠普发展公司,有限责任合伙企业 Integrated antenna and proximity sensor element
CN104956540A (en) * 2013-01-31 2015-09-30 惠普发展公司,有限责任合伙企业 Integrated antenna and proximity sensor element
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CN106461712A (en) * 2014-04-07 2017-02-22 卡文迪什动力有限公司 Head-hand capacitance compensation with digital variable capacitor
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CN105554834A (en) * 2015-08-18 2016-05-04 宇龙计算机通信科技(深圳)有限公司 Antenna switching method of user terminal and user terminal
WO2017028671A1 (en) * 2015-08-18 2017-02-23 宇龙计算机通信科技(深圳)有限公司 Terminal and antenna switching method therefor
CN105939417A (en) * 2016-06-03 2016-09-14 上海摩软通讯技术有限公司 Mobile terminal and signal transmitting power adjusting method of mobile terminal
WO2018121379A1 (en) * 2016-12-29 2018-07-05 歌尔股份有限公司 Smart watch and antenna signal processing circuit and method thereof
US10797378B2 (en) 2016-12-29 2020-10-06 Goertek Inc. Smart watch and antenna signal processing circuit and method thereof
WO2021197126A1 (en) * 2020-03-30 2021-10-07 维沃移动通信有限公司 Electronic device
CN111505395A (en) * 2020-04-24 2020-08-07 宁波麦度智联科技股份有限公司 Processing method for giving consideration to OTA and SAR tests
CN112968274A (en) * 2021-02-03 2021-06-15 维沃移动通信有限公司 Electronic device
CN112968274B (en) * 2021-02-03 2023-12-15 维沃移动通信有限公司 Electronic equipment
CN114221678A (en) * 2022-01-11 2022-03-22 Oppo广东移动通信有限公司 Near field communication chip, wireless communication device, and specific absorption rate detection method
CN114221678B (en) * 2022-01-11 2023-11-21 Oppo广东移动通信有限公司 Near field communication chip, wireless communication device, and specific absorption rate detection method
CN114978217A (en) * 2022-04-15 2022-08-30 深圳市中天迅通信技术股份有限公司 Method and system for reducing SAR (synthetic aperture radar) of mobile phone antenna

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