CN102437835B - The impedance-matching device of device for mobile communication and method - Google Patents
The impedance-matching device of device for mobile communication and method Download PDFInfo
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- CN102437835B CN102437835B CN201010299254.XA CN201010299254A CN102437835B CN 102437835 B CN102437835 B CN 102437835B CN 201010299254 A CN201010299254 A CN 201010299254A CN 102437835 B CN102437835 B CN 102437835B
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Abstract
The impedance-matching device of a kind of device for mobile communication and method.The impedance-matching device of this device for mobile communication includes two electrodes, resistance measurer, adjustable match circuit and controller.Above-mentioned two electrode uses conductive material to make, and is configured on the shell of device for mobile communication.Resistance measurer couples above-mentioned two electrode, measures the resistance value between above-mentioned two electrode.Adjustable match circuit is coupled between the antenna of device for mobile communication and radio circuit, including at least one adjustable impedance element.Controller is coupled between resistance measurer and adjustable match circuit, adjusts the resistance value of above-mentioned adjustable impedance element according to above-mentioned resistance value, makes the impedance matching of antenna and radio circuit.
Description
Technical field
The present invention relates to the impedance matching impedance matching of a kind of device for mobile communication) device with
Method, particularly relates to impedance-matching device and the method for a kind of adjustable impedance value (impedance).
Background technology
Antenna for mobile phone in early days is arranged on shell, not only breaks up attractive in appearance, and once the hands of user touches
Antenna, affects the impedance matching between antenna and radio circuit (radio frequency circuit) greatly,
The radiation efficiency (over-the-air performance) of antenna can be reduced.For attractive in appearance and usefulness consideration,
Current mobile phone all by antenna configurations within shell, even if so, when user grip mobile phone time,
Or impedance matching can be affected because palm hides antenna, and then reduce the radiation efficiency of antenna.
For this problem, there is the space that a kind of ameliorative way is to increase around antenna to improve its radiation effect
Energy.But the compact trend of mobile phone is constant, and the space between shell and circuit board is the narrowest
Little, this ameliorative way is difficult with.
Special impedance matching circuit is generally had, if can make between antenna and the radio circuit of mobile phone
When user grips mobile phone, the resistance value of impedance matching circuit is made correspondence adjustment, also can solve above-mentioned
Radiation efficiency problem.But the resistance value of Conventional impedance match circuit immobilizes, it is impossible to dynamically adjust,
When user picks up mobile phone, still cannot improve for the aerial radiation usefulness reduced.
Summary of the invention
The present invention provides a kind of impedance-matching device for device for mobile communication, can be at user hands
Automatically adjust resistance value when holding, reach optimal impedance matching, to maintain the radiation efficiency of antenna, solve
Certainly the problems referred to above.
The present invention also provides for a kind of impedance matching methods for device for mobile communication, and the method is above-mentioned
Method corresponding to impedance-matching device, can solve user equally and grip the aerial radiation effect caused
Problem can be reduced.
The present invention proposes a kind of impedance-matching device, and this device is used in device for mobile communication, including two
Individual electrode, resistance measurer, adjustable match circuit and controller.Above-mentioned two electrode uses and leads
Electric material is made, and is configured on the shell of device for mobile communication.Resistance measurer couples above-mentioned two electricity
Pole, measures the resistance value between above-mentioned two electrode.Adjustable match circuit is coupled to device for mobile communication
Antenna and radio circuit between, including at least one adjustable impedance element.Controller is coupled to resistance
Between measurer and adjustable match circuit, adjust the resistance of above-mentioned adjustable impedance element according to above-mentioned resistance value
Anti-value, makes the impedance matching of antenna and radio circuit.
Above-mentioned adjustable impedance element can be controllable impedance (variable inductor) or tunable capacitor
(variable capacitor).If controllable impedance, the most above-mentioned resistance value is the inductance value of controllable impedance.
If tunable capacitor, the most above-mentioned resistance value is the capacitance of tunable capacitor.
In one embodiment of this invention, above-mentioned device for mobile communication stores a look-up table (look-up
table).This look-up table records multiple default resistance value scope, and each above-mentioned resistance value scope pair
The default value answered.Controller noted above judges which resistance value scope is above-mentioned resistance value be positioned at, and checks oneself
Look for table to read the numerical value corresponding to resistance value scope at resistance value place, then adjust according to the numerical value read
The resistance value of whole adjustable impedance element.
The present invention also proposes a kind of impedance matching methods, for above-mentioned device for mobile communication.The method is
The corresponding method of above-mentioned impedance-matching device, comprises the following steps.First, above-mentioned two electrode is measured
Between resistance value, then according to this resistance value adjust adjustable impedance element resistance value, make antenna with
The impedance matching of radio circuit.
When user grips device for mobile communication, palm can contact above-mentioned two plate electrodes simultaneously, this
Bright can according to measure different resistance values automatically adjust, reach optimal impedance matching, make antenna spoke
Penetrate usefulness to be unlikely to reduce because of hand-held, and be maintained at the degree of User Satisfaction, before solving
The usefulness stated reduces problem.
Features described above and advantage for making the present invention can become apparent, special embodiment below, and tie
Close accompanying drawing and describe in detail as follows.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of impedance-matching device according to one embodiment of the invention.
Fig. 2 is the flow chart of a kind of impedance matching methods according to one embodiment of the invention.
Reference numeral explanation
100: device for mobile communication
120: impedance-matching device
121,122: electrode
123: resistance measurer
124: controller
125: adjustable match circuit
130: antenna
140: radio circuit
210～240: process step
Detailed description of the invention
Fig. 1 illustrates the partial circuit of a kind of device for mobile communication 100 according to one embodiment of the invention,
Device for mobile communication 100 includes antenna 130, radio circuit 140 and the impedance matching of the present embodiment
Device 120.Device for mobile communication 100 can be mobile phone or personal digital assistant (personal digital
Assistant, be called for short PDA) etc portable electron device.Impedance-matching device 120 includes electrode
121,122, resistance measurer 123, controller 124 and adjustable match circuit 125.Resistance
Survey device 123 and couple electrode 121 and 122.Adjustable match circuit 125 is coupled to device for mobile communication 100
Antenna 130 and radio circuit 140 between.Controller 124 be coupled to resistance measurer 123 with can
Adjust between match circuit 125.
Electrode 121 and 122 is arranged on the shell of device for mobile communication 100.When user is not taken
Play device for mobile communication 100, be off state (open circuit) between electrode 121 and 122.When making
User picks up device for mobile communication 100, contacts electrode 121 and 122 due to palm simultaneously, is the formation of
Channel status (closed circuit).Controller 124 by the resistance variations between electrode 121 and 122,
Detection user is the most gripping device for mobile communication 100.In order to detect the electricity that palm grip is caused
Resistance changes, and electrode 121 must use conductive material to make with 122, such as, make with metal, shell
Remainder be then not intended to use which kind of material.Certainly, electrode 121 and 122 is necessarily placed at conjunction
Reason position, to guarantee that, in general hand-held posture, palm can contact electrode 121 and 122 simultaneously.
Adjustable match circuit 125 includes at least one adjustable impedance element, above-mentioned adjustable impedance element
Resistance value can be adjusted by controller 124, if being adjusted to suitable resistance value, can make antenna 130 with
The impedance matching of radio circuit 140.Each above-mentioned adjustable impedance element can be that adjustable electric perhaps may be used
Adjust inductance.If controllable impedance, above-mentioned resistance value is exactly the inductance value of controllable impedance.If can
Adjusting electric capacity, above-mentioned resistance value is exactly the capacitance of tunable capacitor.Occur that maturation can
Adjustable impedance matching circuit, therefore the present invention utilize this adjustable impedance matching circuit as
Adjustable match circuit 125, proposes impedance-matching device and the method for the present embodiment.
The device for mobile communication 100 of the present embodiment stores a look-up table, and this look-up table can be deposited
At controller 124, or leave in other elements of device for mobile communication 100.Above-mentioned look-up table record
Multiple predefined resistance value scopes, and each numerical value corresponding to resistance value scope.Above-mentioned
Resistance value scope refers to the possible range of the resistance value between electrode 121 and 122, corresponding numerical value
It is used to adjust the setting value of above-mentioned adjustable impedance element.Each resistance value scope correspondence one is preset
Situation, such as user do not grip the situation of device for mobile communication 100, and user grips mobile
The situation of communication device 100.The situation gripped can be segmented further, such as different grip,
And the different situations that palm is moist or dry, can segment further, corresponding different resistance value model
Enclose.The content of above-mentioned look-up table is to determine according to experimental result, can measure each with experiment method
When planting predetermined condition, the resistance value scope between electrode 121 and 122, and sky under this situation, can be made
Line 130 reaches the setting numerical value that optimum impedance is mated with radio circuit 140, makes for controller 124
With.
Fig. 2 is the flow chart of the impedance matching methods of the present embodiment, and the method is by the impedance matching of Fig. 1
Device 120 performs.Following description Fig. 2 flow process.First, resistance measurer 123 measures electrode 121
And the resistance value (step 210) between 122.Controller 124 judges that above-mentioned which be this resistance value be positioned at
One resistance value scope (step 220), the resistance value scope institute reading resistance value place from look-up table is right
The numerical value (step 230) answered.Then, controller 124 adjusts adjustable impedance element according to above-mentioned numerical value
Resistance value (step 240).Thus can make antenna 130 and penetrate under default various situations
The impedance matching optimization of frequency circuit 140.
In sum, the present invention can judge the most residing shape according to the resistance value between two housing electrode
Condition, adjusts adjustable match circuit element impedance therein value according to this, make the antenna of device for mobile communication with
The impedance matching optimization of radio circuit.Consequently, it is possible to aerial radiation usefulness be unlikely to because hand-held and
Reduce, and be maintained at the degree of User Satisfaction, it is possible to resolve conventional art is aerial radiation when hand-held
The problem that usefulness reduces.
Although the present invention discloses as above with embodiment, so it is not limited to the present invention, this area
Technical staff under the premise without departing from the spirit and scope of the present invention, some changes and profit can be made
Decorations, therefore protection scope of the present invention is to be as the criterion with the claim of the present invention.
Claims (6)
1. an impedance-matching device, for a device for mobile communication, including:
Two electrodes, use conductive material to make, are configured on the shell of this device for mobile communication；
One resistance measurer, couples above-mentioned two electrode, measures the resistance value between above-mentioned two electrode；
One adjustable match circuit, is coupled between an antenna of this device for mobile communication and a radio circuit,
Including at least one adjustable impedance element；And
One controller, is coupled between this resistance measurer and this adjustable match circuit, according to this resistance value
Reading a numerical value from a look-up table, wherein this look-up table records multiple resistance value scope and each above-mentioned electricity
This numerical value that Standard resistance range is corresponding, above-mentioned resistance value scope be the resistance value between above-mentioned two electrode can
Energy range, and this controller judges that this resistance value is positioned at which above-mentioned resistance value scope, reading should
This numerical value corresponding to this resistance value scope at resistance value place, to adjust this adjustable impedance according to this numerical value
The resistance value of element, makes the impedance matching of this antenna and this radio circuit,
Wherein, during this look-up table is arranged at this controller.
2. impedance-matching device as claimed in claim 1, wherein this adjustable impedance element is adjustable electric
Sense, this resistance value is the inductance value of this controllable impedance.
3. impedance-matching device as claimed in claim 1, wherein this adjustable impedance element is adjustable electric
Holding, this resistance value is the capacitance of this tunable capacitor.
4. an impedance matching methods, for a device for mobile communication, including:
Measuring the resistance value between two electrodes, wherein above-mentioned two electrode uses conductive material to make, and
And be configured on the shell of this device for mobile communication；
A numerical value, wherein this lookup is read from the look-up table being arranged in a controller according to this resistance value
Table record multiple resistance value scope and this numerical value corresponding to each above-mentioned resistance value scope, above-mentioned resistance value
Scope is the possible range of the resistance value between above-mentioned two electrode；
Judge this resistance value is positioned at which above-mentioned resistance value scope；And
Read this numerical value corresponding to this resistance value scope at this resistance value place, to adjust according to this numerical value
The resistance value of one adjustable impedance element of one adjustable match circuit, make an antenna of this device for mobile communication with
The impedance matching of one radio circuit, wherein this adjustable match circuit be coupled to this antenna and this radio circuit it
Between.
5. impedance matching methods as claimed in claim 4, wherein this adjustable impedance element is adjustable electric
Sense, this resistance value is the inductance value of this controllable impedance.
6. impedance matching methods as claimed in claim 4, wherein this adjustable impedance element is adjustable electric
Holding, this resistance value is the capacitance of this tunable capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010299254.XA CN102437835B (en) | 2010-09-29 | 2010-09-29 | The impedance-matching device of device for mobile communication and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010299254.XA CN102437835B (en) | 2010-09-29 | 2010-09-29 | The impedance-matching device of device for mobile communication and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102437835A CN102437835A (en) | 2012-05-02 |
| CN102437835B true CN102437835B (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010299254.XA Expired - Fee Related CN102437835B (en) | 2010-09-29 | 2010-09-29 | The impedance-matching device of device for mobile communication and method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779966A (en) * | 2014-01-15 | 2015-07-15 | 启碁科技股份有限公司 | Wireless communication device |
| US10312582B2 (en) * | 2016-05-27 | 2019-06-04 | Futurewei Technologies, Inc. | Closed loop aperture tunable antenna |
| CN106711581B (en) * | 2016-12-12 | 2019-05-03 | Oppo广东移动通信有限公司 | The antenna assembly and mobile terminal of mobile terminal |
| CN117538616B (en) * | 2024-01-09 | 2024-04-23 | 深圳市瀚强科技股份有限公司 | Impedance detection method, impedance detection circuit and impedance detection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1941639A (en) * | 2005-09-30 | 2007-04-04 | 英飞凌科技股份公司 | Transmitting arrangement and method for impedance matching |
| CN101015128A (en) * | 2004-05-03 | 2007-08-08 | 索尼爱立信移动通讯股份有限公司 | Impedance matching circuit for a mobile communication device |
-
2010
- 2010-09-29 CN CN201010299254.XA patent/CN102437835B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101015128A (en) * | 2004-05-03 | 2007-08-08 | 索尼爱立信移动通讯股份有限公司 | Impedance matching circuit for a mobile communication device |
| CN1941639A (en) * | 2005-09-30 | 2007-04-04 | 英飞凌科技股份公司 | Transmitting arrangement and method for impedance matching |
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| CN102437835A (en) | 2012-05-02 |
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Granted publication date: 20160928 Termination date: 20200929 |