CN102377025A - Antenna module and impedance matching method thereof - Google Patents
Antenna module and impedance matching method thereof Download PDFInfo
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- CN102377025A CN102377025A CN2010102627940A CN201010262794A CN102377025A CN 102377025 A CN102377025 A CN 102377025A CN 2010102627940 A CN2010102627940 A CN 2010102627940A CN 201010262794 A CN201010262794 A CN 201010262794A CN 102377025 A CN102377025 A CN 102377025A
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Abstract
The invention discloses an antenna module and an impedance matching method thereof. The antenna module comprises an antenna main body, a tunable matching circuit and a control unit, wherein the antenna main body is provided with a signal feeding point; the tunable matching circuit is electrically connected to the signal feeding point for providing a load impedance; the tunable matching circuit comprises an inductor, a first tunable capacitor and a second tunable capacitor; one end of the first tunable capacitor is electrically connected to one end of the inductor; one end of the second tunable capacitor is electrically connected to the other end of the first tunable capacitor and the signal feeding point; the other end of the second tunable capacitor is electrically connected to a system and is grounded; and the control unit is electronically connected to the tunable matching circuit for reading an operation frequency band, accordingly generating a control signal and suitably adjusting capacitance values of the first and second tunable capacitors.
Description
Technical field
The invention relates to a kind of Anneta module, and particularly relevant for a kind of Anneta module of adjusting load impedance.
Background technology
Along with the evolution and the technology thereof of mobile telephone system are made a leapleap forward; From early stage 2G system progress the 3G system and following LTE (the Long Term Evolution) system up till now; Wherein LTE is a MISO (Multi-input Single-out) system, makes that the frequency range of the required support of mobile phone is also more day by day and wide more.Yet in general known Antenna Design, the match circuit that connects between antenna and the power amplifier promptly can't be adjusted behind the motherboard piece, thus fixing its frequency range characteristic range.
Therefore, pass through known technology when desire, design is applicable to the LTE system, then needs two antenna bodies, and one of them is in order to be responsible for transmission and to receive; Another antenna body is then in order to be responsible for reception; Yet this will occupy too much mobile phone inner space; And the telephone antenna in the script mobile phone still exists, and therefore needs at least three antennas just can be applicable to GSM frequency range and LTE frequency range altogether, and this is very big for compact product design trend influence.In addition, because the restriction of antenna for mobile phone at present, also be difficult to reach and satisfy the required operation frequency range of LTE system, as between the 698MHz to 894MHz.
The valid function frequency range (effective operating frequency) of GSM frequency range is merely (894-824)/[(894+824)/2]=8% at present.Combine with original telephone antenna as if an antenna with LTE future; Then need contain at least (894-698)/the valid function frequency range (effectiveoperating frequency) of [(894+698)/2]=25%; But because the restriction of present antenna for mobile phone, so big frequency range demand is to reach.
Summary of the invention
The objective of the invention is is providing a kind of Anneta module, and the notion utilization through adjustable match circuit adjusting its load impedance, and then is not changing under the antenna body project organization, increases its valid function frequency range.
One side of the present invention is to propose a kind of Anneta module, comprises an antenna body, an adjustable match circuit and a control unit.Antenna body has a signal feed-in point.Adjustable match circuit electrically connects signal feed-in point, and in order to a load impedance to be provided, and adjustable match circuit comprises an inductance, one first adjustable electric capacity and one second adjustable electric capacity.One end of the first adjustable electric capacity electrically connects an end of inductance.One end of the second adjustable electric capacity electrically connects the other end and the signal feed-in point of the first adjustable electric capacity, and the other end of the second adjustable electric capacity is electrically connected to system ground.One control unit electrically connects adjustable match circuit, in order to reading an operation frequency range, and produces output one according to this and controls signal to adjustable match circuit, can adjust the capacitance of the first adjustable electric capacity and the second adjustable electric capacity rightly.
According to one embodiment of the invention, wherein control unit comprises a microprocessor, in order to from a central processing unit read operation frequency range.
According to one embodiment of the invention, wherein microprocessor also comprises a matched data table, and microprocessor is according to operation frequency range, the corresponding capacitance data value of mating of acquisition institute.
According to one embodiment of the invention, wherein capacitance data comprises a data value of the first adjustable electric capacity and a data value of the second adjustable electric capacity.
According to one embodiment of the invention, wherein control unit also comprises a control circuit, electrically connects microprocessor and adjustable match circuit.
According to one embodiment of the invention, wherein control circuit in order to produce control signal to export adjustable match circuit to, changes the capacitance of the first adjustable electric capacity and the second adjustable electric capacity according to the capacitance data value respectively.
According to one embodiment of the invention, wherein the capacitance scope of the first adjustable electric capacity and this second adjustable electric capacity is 0.2pF-20pF.
According to one embodiment of the invention, wherein the capacitance of the first adjustable electric capacity is greater than the capacitance of the second adjustable electric capacity.
According to one embodiment of the invention, wherein the inductance value of inductance is 2.2nH.
Another aspect of the present invention is the impedance matching methods that proposes a kind of Anneta module, and wherein Anneta module comprises an adjustable match circuit, and it has an inductance, one first adjustable electric capacity and one second adjustable electric capacity.This impedance matching methods comprises the following step: at first, read an operation frequency range; Secondly, according to operation frequency range, produce output one and control signal to adjustable match circuit; And, last, according to control signal, can adjust the capacitance of the first adjustable electric capacity and the second adjustable electric capacity, with a load impedance of adjustment match circuit rightly.
According to one embodiment of the invention, wherein also comprise from a central processing unit, read this operation frequency range.
According to one embodiment of the invention, wherein also comprise according to operation frequency range the corresponding capacitance data value of mating of acquisition institute.
According to one embodiment of the invention, wherein also comprise from a matched data table corresponding acquisition capacitance data value.
According to one embodiment of the invention, wherein capacitance data comprises a data value of the first adjustable electric capacity and a data value of the second adjustable electric capacity.
According to one embodiment of the invention, wherein also comprise according to the capacitance data value, produce control signal and export adjustable match circuit to.
Thus, see through above-mentioned circuit design notion and the method thereof of the present invention, then can not change under the antenna body structural design, be able to effectively increase the valid function frequency range of its antenna, and then contain operation frequency ranges such as GSM and LTE simultaneously.In view of the above, can reduce the usage quantity and the volume of each band antenna main body, thereby not only can save configuration space and manufacturing cost, also can keep its good reception quality and contain wider valid function frequency range.
Description of drawings
For letting above and other objects of the present invention, characteristic, advantage and the embodiment can be more obviously understandable, the explanation of appended accompanying drawing be following:
Fig. 1 illustrates the functional block diagram of Anneta module according to an embodiment of the invention;
Fig. 2 is the circuit diagram that illustrates the adjustable match circuit of Anneta module among Fig. 1;
Fig. 3 illustrates matched data table according to an embodiment of the invention;
Fig. 4 is the flow chart that illustrates according to the impedance matching methods of a kind of Anneta module of this embodiment.
[primary clustering symbol description]
100: Anneta module 132: microprocessor
110: antenna body 134: the matched data table
112: signal feed-in point 136: control circuit
120: adjustable match circuit 200: central processing unit
122: inductance 300: power amplifier
124: the first adjustable electric capacity 400: impedance matching methods
126: the second adjustable electric capacity 401,402,403: step
130: control unit
Embodiment
In order to make narration of the present invention more detailed and complete, can be with reference to appended accompanying drawing and the various embodiment of the following stated, identical number is represented same or analogous assembly in the accompanying drawing.On the other hand, well-known assembly and step are not described among the embodiment, with the restriction of avoiding causing the present invention unnecessary.
Please be simultaneously with reference to Fig. 1 and Fig. 2, Fig. 1 illustrates the functional block diagram of Anneta module according to an embodiment of the invention, and Fig. 2 is the circuit diagram that illustrates the adjustable match circuit of Anneta module among Fig. 1.As shown in the figure, a kind of Anneta module 100 comprises an antenna body 110, one an adjustable match circuit 120 and a control unit 130.Antenna body 110 has a signal feed-in point 112.Adjustable match circuit 120 electrically connects signal feed-in point 112, and in order to a load impedance to be provided, and adjustable match circuit 120 comprises an inductance 122, one first adjustable electric capacity 124 and one second adjustable electric capacity 126.One end of the first adjustable electric capacity 124 electrically connects an end of inductance 122.One end of the second adjustable electric capacity 126 electrically connects the other end of the first adjustable electric capacity 124 and the other end of signal feed-in point 112, the second adjustable electric capacity 126 is electrically connected to system ground.One control unit 130 electrically connects adjustable match circuit 120; In order to read an operation frequency range; And produce output one according to this and control signal to adjustable match circuit 120, can adjust the capacitance of the first adjustable electric capacity 124 and the second adjustable electric capacity 126 rightly.
Yet in one embodiment, the capacitance scope of the first adjustable electric capacity 124 and the second adjustable electric capacity 126 is between the 0.2pF-20pF.In addition, 122 of inductance have a fixed inductance value, and in one embodiment, the inductance value of inductance 122 is 2.2nH.Therefore; Adjustable match circuit 120 is through changing the capacitance of the first adjustable electric capacity 124 and the second adjustable electric capacity 126; And carry the collocation inductance 122; Promptly can effectively reach impedance matching thereby adjust its load impedance, to increase the operation frequency range scope of Anneta module 100 appositely according to the radiofrequency signal of different frequency range.Preferably, the capacitance of the first adjustable electric capacity 124 is greater than the capacitance of the second adjustable electric capacity 126.
Please continue with reference to Fig. 1, control unit 130 comprises a microprocessor 132, in order to from a central processing unit 200 read operation frequency ranges.Further; When Anneta module 100 pairing communication systems uses operate in a particular rf frequency range or switch use to another radio frequency band; For example: switch to the LTE operation frequency range from the GSM operation frequency range; Microprocessor 132 can see through central processing unit 200, detects its definite operated radio frequency band.
Secondly, microprocessor 132 also comprises a matched data table (look-up table for matching) 134, and as shown in Figure 3, it illustrates the matched data table of one preferred embodiment according to the present invention.Microprocessor 132 is according to the detect operation frequency range that reads, corresponding first an adjustable electric capacity 124 that matees of acquisition institute and a capacitance data value of the second adjustable electric capacity 126 in matched data table 134.For instance, when operation frequency range is that GSM and inductance 122 have a fixed inductance value when being 2.2nH, the first adjustable electric capacity 124 that is captured and the data value of the second adjustable electric capacity 126 are respectively 5.6pF and 0.5pF; Yet when operation frequency range is that LTE and inductance 122 have fixed inductance value when being 2.2nH, the first adjustable electric capacity 124 that is captured and the data value of the second adjustable electric capacity 126 are respectively 2.2pF and 1.0pF.
Moreover control unit 130 also comprises a control circuit 136, electrically connects microprocessor 132 and adjustable match circuit 120.Control circuit 136 is according to present capacitance data value, in order to produce control signal to export adjustable match circuit 120 to.Thus; Be able to change accordingly the capacitance of the first adjustable electric capacity 124 and the second adjustable electric capacity 126 through control signal; Cause when operation frequency range switches; The input of adjustable match circuit 120 equivalent load impedance (equivalent loadingimpedance), also can be synchronously and the output impedance of transmission line reach impedance matching, and then the radiofrequency signal that can be exported from power amplifier 300 definitely transmits and exports antenna body 110 to; And reduce the signal reflex amount in its process, vice versa.Therefore, its operation frequency range and communication quality all can significantly expand and promote.
Please with reference to Fig. 4, it illustrates the flow chart according to the impedance matching methods of a kind of Anneta module of this embodiment.The impedance matching methods 400 of the Anneta module of present embodiment for example is the Anneta module 100 that is applied among Fig. 1.As stated, Anneta module 100 comprises an adjustable match circuit 120, and it has an inductance 122, one first adjustable electric capacity 124 and one second adjustable electric capacity 126.Yet in the flow process that Fig. 4 disclosed, the impedance matching methods 400 of Anneta module comprises following steps.
At first, step 401 is for reading an operation frequency range; Secondly, be according to operation frequency range in the step 402, produce output one and control signal to adjustable match circuit; At last, step 403 is according to control signal, changes the capacitance of the first adjustable electric capacity and the second adjustable electric capacity, can adjust a load impedance of match circuit rightly.
In step 401, impedance matching methods 400 is in central processing unit 200, reads its operated frequency range, is through central processing unit 200, detects the operation frequency range of the radiofrequency signal of being exported from power amplifier 300.
In step 402,400 of impedance matching methods are according to operation frequency range, in the contrast of tabling look-up of matched data table 134, and a capacitance data value of mating with acquisition institute correspondence.Yet this capacitance data value then comprises a data value of the first adjustable electric capacity 124 and a data value of the second adjustable electric capacity 126.In one embodiment, when operation frequency range is that GSM and inductance 122 have a fixed inductance value when being 2.2nH, in matched data table 134 the first adjustable electric capacity 124 and the data value of the second adjustable electric capacity 126 of corresponding acquisition be respectively 5.6pF and 0.5pF; Yet,, be respectively 2.2pF and 1.0pF from the first adjustable electric capacity 124 of matched data table 134 a corresponding acquisition and the data value of the second adjustable electric capacity 126 when operation frequency range is that LTE and inductance 122 have fixed inductance value when being 2.2nH.
In addition, 400 of impedance matching methods are according to the capacitance data value that is captured, and produce control signal and export adjustable match circuit 120 to.
In step 403; Impedance matching methods 400 is according to control signal; Change the capacitance of the first adjustable electric capacity 124 and the second adjustable electric capacity 126, and collocation inductance 122, promptly can be appositely according to the radiofrequency signal of different operating frequency range; With adjustment match circuit 120 equivalent load impedance, thereby increase the scope of valid function frequency range.
Thus, see through above-mentioned circuit design notion and the method thereof of the present invention, then can not change under the antenna body structural design, be able to effectively increase the valid function frequency range of its antenna, and then contain operation frequency ranges such as GSM and LTE simultaneously.In view of the above, can reduce the usage quantity and the volume of each band antenna main body, thereby not only can save configuration space and manufacturing cost, also can keep its good reception quality and contain wider valid function frequency range.
Though the present invention discloses as above with execution mode; Right its is not in order to limiting the present invention, anyly is familiar with this art, do not breaking away from the spirit and scope of the present invention; When can doing various changes and retouching, so protection scope of the present invention is as the criterion when looking the scope that claims define.
Claims (13)
1. an Anneta module is characterized in that, comprises:
One antenna body has a signal feed-in point;
One adjustable match circuit electrically connects this signal feed-in point, and in order to a load impedance to be provided, this adjustable match circuit comprises:
One inductance;
One first adjustable electric capacity, an end of this first adjustable electric capacity electrically connects an end of this inductance; And
One second adjustable electric capacity, an end of this second adjustable electric capacity electrically connects the other end and this signal feed-in point of this first adjustable electric capacity, and the other end of this second adjustable electric capacity is electrically connected to system ground; And
One control unit; Electrically connect this adjustable match circuit, in order to reading an operation frequency range, and produce output one according to this and control signal to this adjustable match circuit; Can adjust the capacitance of this first adjustable electric capacity and this second adjustable electric capacity, to adjust this load impedance rightly.
2. Anneta module according to claim 1 is characterized in that this control unit comprises a microprocessor, in order to read this operation frequency range from a central processing unit.
3. Anneta module according to claim 2; It is characterized in that; This microprocessor also comprises a matched data table; And this microprocessor is according to this operation frequency range, the corresponding capacitance data value of mating of acquisition institute, and this capacitance data value comprises a data value of this first adjustable electric capacity and a data value of this second adjustable electric capacity.
4. Anneta module according to claim 3 is characterized in that this control unit also comprises a control circuit, electrically connects this microprocessor and this adjustable match circuit.
5. Anneta module according to claim 4; It is characterized in that; This control circuit in order to produce this control signal to export this adjustable match circuit to, changes the capacitance of this first adjustable electric capacity and this second adjustable electric capacity according to this capacitance data value respectively.
6. Anneta module according to claim 1 is characterized in that, the capacitance scope of this first adjustable electric capacity and this second adjustable electric capacity is 0.2pF-20pF.
7. Anneta module according to claim 1 is characterized in that the capacitance of this first adjustable electric capacity is greater than the capacitance of this second adjustable electric capacity.
8. Anneta module according to claim 1 is characterized in that, the inductance value of this inductance is 2.2nH.
9. the impedance matching methods of an Anneta module; It is characterized in that; This Anneta module comprises an adjustable match circuit, and this adjustable match circuit has an inductance, one first adjustable electric capacity and one second adjustable electric capacity, and this impedance matching methods comprises the following step:
Read an operation frequency range;
According to this operation frequency range, produce output one and control signal to this adjustable match circuit; And
According to this control signal, can adjust the capacitance of this first adjustable electric capacity and this second adjustable electric capacity, to adjust a load impedance of this match circuit rightly.
10. the impedance matching methods of Anneta module according to claim 9 is characterized in that, also comprises:
From a central processing unit, read this operation frequency range.
11. the impedance matching methods of Anneta module according to claim 9 is characterized in that, also comprises:
According to this operation frequency range, from the corresponding capacitance data value of mating of matched data table acquisition institute.
12. the impedance matching methods of Anneta module according to claim 11 is characterized in that, this capacitance data comprises a data value of this first adjustable electric capacity and a data value of this second adjustable electric capacity.
13. the impedance matching methods of Anneta module according to claim 11 is characterized in that, also comprises:
According to this capacitance data value, produce this control signal and export this adjustable match circuit to.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102627940A CN102377025A (en) | 2010-08-24 | 2010-08-24 | Antenna module and impedance matching method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102627940A CN102377025A (en) | 2010-08-24 | 2010-08-24 | Antenna module and impedance matching method thereof |
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| CN102377025A true CN102377025A (en) | 2012-03-14 |
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| CN2010102627940A Pending CN102377025A (en) | 2010-08-24 | 2010-08-24 | Antenna module and impedance matching method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103682572A (en) * | 2012-08-29 | 2014-03-26 | 宏达国际电子股份有限公司 | Mobile device |
| CN103731175A (en) * | 2012-10-10 | 2014-04-16 | 深圳富泰宏精密工业有限公司 | Antenna assembly and wireless communication device provided with antenna assembly |
| CN105742818A (en) * | 2016-03-25 | 2016-07-06 | 联想(北京)有限公司 | Antenna and control method |
| CN106358282A (en) * | 2016-10-26 | 2017-01-25 | 努比亚技术有限公司 | Device and method for optimizing emission power dissipation of mobile terminal |
| CN106356632A (en) * | 2016-09-14 | 2017-01-25 | 宇龙计算机通信科技(深圳)有限公司 | Active antenna system and mobile terminal |
| CN106785339A (en) * | 2016-12-29 | 2017-05-31 | 歌尔股份有限公司 | A kind of wearable device and its array signal processing circuit and method |
| US10003121B2 (en) | 2012-08-29 | 2018-06-19 | Htc Corporation | Mobile device and antenna structure |
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| CN1183013A (en) * | 1996-08-07 | 1998-05-27 | 诺基亚流动电话有限公司 | Antenna switching circuit for radio telephone |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US10003121B2 (en) | 2012-08-29 | 2018-06-19 | Htc Corporation | Mobile device and antenna structure |
| CN103682572A (en) * | 2012-08-29 | 2014-03-26 | 宏达国际电子股份有限公司 | Mobile device |
| CN103682572B (en) * | 2012-08-29 | 2016-12-28 | 宏达国际电子股份有限公司 | Mobile device |
| US11063343B2 (en) | 2012-08-29 | 2021-07-13 | Htc Corporation | Mobile device and antenna structure |
| US10553932B2 (en) | 2012-08-29 | 2020-02-04 | Htc Corporation | Mobile device and antenna structure |
| US10027025B2 (en) | 2012-08-29 | 2018-07-17 | Htc Corporation | Mobile device and antenna structure therein |
| CN103731175A (en) * | 2012-10-10 | 2014-04-16 | 深圳富泰宏精密工业有限公司 | Antenna assembly and wireless communication device provided with antenna assembly |
| CN105742818A (en) * | 2016-03-25 | 2016-07-06 | 联想(北京)有限公司 | Antenna and control method |
| CN106356632A (en) * | 2016-09-14 | 2017-01-25 | 宇龙计算机通信科技(深圳)有限公司 | Active antenna system and mobile terminal |
| CN106358282A (en) * | 2016-10-26 | 2017-01-25 | 努比亚技术有限公司 | Device and method for optimizing emission power dissipation of mobile terminal |
| CN106785339A (en) * | 2016-12-29 | 2017-05-31 | 歌尔股份有限公司 | A kind of wearable device and its array signal processing circuit and method |
| CN106785339B (en) * | 2016-12-29 | 2023-11-24 | 歌尔股份有限公司 | Wearable device and antenna signal processing circuit and method thereof |
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Application publication date: 20120314 |