CN202696585U - Self-tuning impedance matching system - Google Patents
Self-tuning impedance matching system Download PDFInfo
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- CN202696585U CN202696585U CN 201220380836 CN201220380836U CN202696585U CN 202696585 U CN202696585 U CN 202696585U CN 201220380836 CN201220380836 CN 201220380836 CN 201220380836 U CN201220380836 U CN 201220380836U CN 202696585 U CN202696585 U CN 202696585U
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- tuning
- tuning circuit
- impedance matching
- matching system
- cpu controller
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Abstract
The utility model discloses a self-tuning impedance matching system. The self-tuning impedance matching system comprises a CPU (Central Processing Unit) controller, a RF (Radio Frequency) chip used for transmitting RF signals under the control of the CPU controller and electrically connected with the CPU controller, a tuning circuit connected with the RF chip through a coupler, and a power detector used for detecting a feedback signal of a tuning circuit and respectively electrically connected with the CPU controller and the tuning circuit, wherein the tuning circuit comprises three digital tuning capacitors, two of which are connected in parallel and are connected in series with the other digital tuning capacitor. Through the structural design above, the self-tuning impedance matching system provided by the utility model uses the CPU controller to tune the tuning circuit in a feedback type tuning way; the tuning circuit is adjusted rapidly based on capacitance change feedback information of the tuning circuit at each time; and manual operation is unnecessary in the tuning process. Therefore, the self-tuning impedance matching system, disclosed by the utility model, has the advantages of being capable of finishing tuning work automatically and obtaining a relatively high tuning efficiency.
Description
Technical field
The utility model relates to electronic technology field, more particularly, and particularly a kind of automatic tuning impedance matching system.
Background technology
For the wireless communications products that provides in the prior art or RFID read-write equipment, need operating personnel manually to change components and parts during tuning circuit between product coupling and realize, so cause the resonance matching inefficiency.And when read-write equipment was connected to antenna by feeder line, its impedance accuracy was lower, also had the larger situation of deviation, so caused energy loss.
In sum, how to solve the resonance matching problem between the wireless communications products, become those skilled in the art's problem demanding prompt solution.
The utility model content
The technical problems to be solved in the utility model is for providing a kind of automatic tuning impedance matching system, and this system can need not manual operation fast to carrying out resonance matching between the wireless communications products by its structural design, and efficient is higher.
For solving the problems of the technologies described above, the utility model provides a kind of automatic tuning impedance matching system,
Comprise: cpu controller; Be subjected to the radio frequency chip of described cpu controller control emitting radio frequency signal, described radio frequency chip and the electrical connection of described cpu controller; The tuning circuit that is connected by coupler with described radio frequency chip; For detection of the power detector of described tuning circuit feedback signal, described power detector is electrically connected with described cpu controller and described tuning circuit respectively;
Described tuning circuit comprises three digital tuning capacitors, two parallel connections in three described digital tuning capacitors, and connect with last.
Preferably, described digital tuning capacitor is that 32 steps advance capacitor.
Preferably, the utility model also comprises power amplifier, and described power amplifier is electrically connected with described radio frequency chip and described coupler respectively.
The utility model provides a kind of automatic tuning impedance matching system, comprising: cpu controller; Be subjected to the radio frequency chip of cpu controller control emitting radio frequency signal, radio frequency chip and cpu controller electrical connection; The tuning circuit that is connected by coupler with radio frequency chip; For detection of the power detector of tuning circuit feedback signal, power detector is electrically connected with cpu controller and tuning circuit respectively; Tuning circuit comprises three digital tuning capacitors, two parallel connections in three digital tuning capacitors, and connect with last.
In the said structure design, cpu controller control radio frequency chip sends radiofrequency signal, and is input to coupler, and coupler can output to tuning circuit, and CPU can record through power detector the signal strength signal intensity of coupler coupling port simultaneously.If tuning circuit does not mate, have signal reflex and return, the value meeting car following-theory value that measure through power detector this moment is variant, then just can regulate tuning circuit by cpu controller, thereby reach the state of coupling.In tuning circuit, because the digital tuning capacitor has multistage step value, the capacitance of digital tuning capacitor is just measured primary event power by power detector, when all finishing, each combination compares reflection power, the take-off output value is hour corresponding each digital tuning condenser capacitance value (being exactly the value of power loss minimum), then finishes tuner operation according to the value setting that obtains.
The automatic tuning impedance matching system that the utility model provides, design by said structure, use cpu controller to carry out tuning to tuning circuit, its coordination mode is the tuning manner of reaction type, fast tuning circuit is adjusted according to tuning circuit capacitance variation feedback information each time, this process need not manual operation, can automatically finish tuning work, and tuning efficient is higher.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to the accompanying drawing that provides other accompanying drawing.
Fig. 1 is the structured flowchart of automatic tuning impedance matching system among a kind of embodiment of the utility model;
The corresponding relation of component names and Reference numeral is among Fig. 1:
Cpu controller 1; Radio frequency chip 2; Coupler 3; Power detector 4;
Tuning circuit 5; Power amplifier 6.
Embodiment
Core of the present utility model is for providing a kind of automatic tuning impedance matching system, and this system can need not manual operation fast to carrying out resonance matching between the wireless communications products by its structural design, and efficient is higher.
In order to make those skilled in the art understand better the technical solution of the utility model, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, Fig. 1 is the structural representation of parking calling system among a kind of embodiment of the utility model.
The utility model provides a kind of automatic tuning impedance matching system, comprising: cpu controller 1; Be subjected to the radio frequency chip 2 of cpu controller 1 control emitting radio frequency signal, radio frequency chip 2 and cpu controller 1 electrical connection; The tuning circuit 5 that is connected by coupler 3 with radio frequency chip 2; For detection of the power detector 4 of tuning circuit 5 feedback signals, power detector 4 is electrically connected with cpu controller 1 and tuning circuit 5 respectively; Tuning circuit 5 comprises three digital tuning capacitors, two parallel connections in three digital tuning capacitors, and connect with last.
In the said structure design, cpu controller 1 control radio frequency chip 2 sends radiofrequency signal, through being input to coupler 3 after power amplifier 6 amplifications, coupler 3 can output to tuning circuit 5, and CPU can record through power detector 4 signal strength signal intensity of coupler 3 coupling port simultaneously.If tuning circuit 5 does not mate, have signal reflex and return, the value meeting car following-theory value that measure through power detector 4 this moment is variant, then just can regulate tuning circuit 5 by cpu controller 1, thereby reach the state of coupling.In tuning circuit 5, because the digital tuning capacitor has multistage step value, the capacitance of digital tuning capacitor is just measured primary event power by power detector 4, when all finishing, each combination compares reflection power, the take-off output value is hour corresponding each digital tuning condenser capacitance value (being exactly the value of power loss minimum), then finishes tuner operation according to the value setting that obtains.
The automatic tuning impedance matching system that the utility model provides, design by said structure, it is tuning to use 1 pair of tuning circuit of cpu controller 5 to carry out, its coordination mode is the tuning manner of reaction type, fast tuning circuit 5 is adjusted according to tuning circuit 5 capacitance variation feedback information each time, this process need not manual operation, can automatically finish tuning work, and tuning efficient is higher.
Particularly, the digital tuning capacitor is that 32 steps advance capacitor, and therefore tuning circuit 5, the utlity model has total combination 323=32768 step and advance owing to be provided with three digital tuning capacitors, and its adjustable range is wider.
Particularly, the utility model also comprises power amplifier 6, and power amplifier 6 is electrically connected with radio frequency chip 2 and described coupler 3 respectively.Its embodiment above-described embodiment is introduced in detail, does not repeat them here.
Claims (3)
1. an automatic tuning impedance matching system is characterized in that,
Comprise: cpu controller (1); Be subjected to the radio frequency chip (2) of described cpu controller (1) control emitting radio frequency signal, described radio frequency chip (2) and described cpu controller (1) electrical connection; The tuning circuit (5) that is connected by coupler (3) with described radio frequency chip (2); For detection of the power detector (4) of described tuning circuit (5) feedback signal, described power detector (4) is electrically connected with described cpu controller (1) and described tuning circuit (5) respectively;
Described tuning circuit (5) comprises three digital tuning capacitors, two parallel connections in three described digital tuning capacitors, and connect with last.
2. automatic tuning impedance matching system according to claim 1 is characterized in that, described digital tuning capacitor is that 32 steps advance capacitor.
3. automatic tuning impedance matching system according to claim 1 and 2 is characterized in that, also comprises power amplifier (6), and described power amplifier (6) is electrically connected with described radio frequency chip (2) and described coupler (3) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380836 CN202696585U (en) | 2012-08-03 | 2012-08-03 | Self-tuning impedance matching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380836 CN202696585U (en) | 2012-08-03 | 2012-08-03 | Self-tuning impedance matching system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202696585U true CN202696585U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220380836 Expired - Fee Related CN202696585U (en) | 2012-08-03 | 2012-08-03 | Self-tuning impedance matching system |
Country Status (1)
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| CN (1) | CN202696585U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106571878A (en) * | 2016-11-07 | 2017-04-19 | 广东欧珀移动通信有限公司 | RF fault detection method and device |
| CN106646023A (en) * | 2016-10-25 | 2017-05-10 | 深圳安科高技术股份有限公司 | Radio frequency transmitting coil resonance point detection method and system |
| CN106972870A (en) * | 2017-03-31 | 2017-07-21 | 维沃移动通信有限公司 | A kind of antenna tuning circuit, mobile terminal and antenna tuning method |
-
2012
- 2012-08-03 CN CN 201220380836 patent/CN202696585U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646023A (en) * | 2016-10-25 | 2017-05-10 | 深圳安科高技术股份有限公司 | Radio frequency transmitting coil resonance point detection method and system |
| CN106571878A (en) * | 2016-11-07 | 2017-04-19 | 广东欧珀移动通信有限公司 | RF fault detection method and device |
| CN106571878B (en) * | 2016-11-07 | 2020-05-12 | Oppo广东移动通信有限公司 | Method and device for detecting radio frequency fault |
| CN106972870A (en) * | 2017-03-31 | 2017-07-21 | 维沃移动通信有限公司 | A kind of antenna tuning circuit, mobile terminal and antenna tuning method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NING BO BOIGLE INTELLIGENT TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: NINGBO BOIGLE DIGITAL TECHNOLOGY CO., LTD. Effective date: 20141103 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 315300 NINGBO, ZHEJIANG PROVINCE TO: 315325 NINGBO, ZHEJIANG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20141103 Address after: 315325, Tianyuan Town, Zhejiang City, Cixi Province Tang Village Patentee after: NINGBO BOIGLE INTELLIGENT TECHNOLOGY CO., LTD. Address before: 315300, Tianyuan Town, Zhejiang City, Cixi Province Tang Village Patentee before: Ningbo Boigle Digital Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20150803 |
|
| EXPY | Termination of patent right or utility model |