CN201018502Y - Trunk amplifier for TD-SCDMA system network overlay - Google Patents
Trunk amplifier for TD-SCDMA system network overlay Download PDFInfo
- Publication number
- CN201018502Y CN201018502Y CNU2006200160730U CN200620016073U CN201018502Y CN 201018502 Y CN201018502 Y CN 201018502Y CN U2006200160730 U CNU2006200160730 U CN U2006200160730U CN 200620016073 U CN200620016073 U CN 200620016073U CN 201018502 Y CN201018502 Y CN 201018502Y
- Authority
- CN
- China
- Prior art keywords
- amplification circuit
- signal
- low
- amplifier
- noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a trunk amplifier, which comprises a radio frequency amplifying module with a time division duplex mode to conduct low-noise amplification to an uplink input signal and make power amplification to an input signal and a synchronous control module coupled with the radio frequency amplifying module to respectively generate control signals to control uplink and downlink operation of the radio frequency amplifying module. As power of a downlink signal is amplified, low-noise amplification to an uplink signal is switched off. While power of the uplink signal is processed through low-noise amplification, the power amplification to the downlink signal is switched off. In addition, a monitoring module is provided and connected with the radio frequency amplifying module to sample and monitor input and output signals of the radio frequency amplifying module. The trunk amplifier adopts time division duplex mode, particularly applies to indoor network coverage of TD-SCDMA systems and has the advantages of intelligent monitoring and optimal radio frequency amplification index.
Description
Technical field
The utility model relates to the trunk amplifier that a kind of TD-SCDMA of being used for grid covers.
Background technology
TD-SCDMA system as one of 3G (Third Generation) Moblie standard is the 3G standard that China proposes, it adopts the working method of TDD mode (TDD), adopt key technologies such as smart antenna, uplink synchronous, dynamic channel allocation, joint-detection and baton handover, thereby have the following advantages: frequency resource that need not be paired; Need not duplexer; Simple radio-frequency front-end; The non-symmetrical service transmission; Need not soft handover etc.
Trunk amplifier also is the dried device of putting, and is used for amplifying the backbone signal, generally is located at the signal initiating terminal, realizes longer-distance signal transmission.Trunk amplifier can be used in the indoor distributed system, the wireless signal that the repeater is introduced amplifies and reaches the same frequency amplifying device that expansion covers, weak signal is after trunk amplifier amplifies, through power splitter, feeder line wireless signal is distributed to indoor diverse location, realize indoor covering by antenna again.
And covering the trunk amplifier of product as the TD-SCDMA grid, it must cooperate particular job pattern of the TDD mode of TD-SCDMA network system.And traditional trunk amplifier can't be applicable to that the TD-SCDMA grid covers, and therefore, we are necessary the trunk amplifier that a TD-SCDMA of being specifically designed to grid of development and Design covers, and has more excellent radio frequency amplification index.
The utility model content
The purpose of this utility model is to propose the trunk amplifier that a kind of TD-SCDMA of being used for grid covers, and can cooperate the TD-SCDMA system to work under TDD mode, and has more excellent radio frequency amplification index.
For addressing the above problem, the utility model discloses the trunk amplifier that a kind of TD-SCDMA of being used for grid covers, and the network backbone of the TD-SCDMA system of TDD mode work is carried out signal amplify, and comprising:
RF Amplifier Module adopts TDD mode, to the up low noise processing and amplifying of carrying out of input signal, power amplification is carried out in input signal descending handled;
Synchronization control module, couple with described RF Amplifier Module, produce the control signal of controlling the work of described RF Amplifier Module uplink and downlink respectively, when downstream signal being carried out the power amplification processing, shutoff is to the low noise processing and amplifying of upward signal, when upward signal is carried out the low noise processing and amplifying, turn-off the power amplification of downstream signal is handled;
Monitoring module is connected with described RF Amplifier Module, to the monitoring of sampling of the input signal of described RF Amplifier Module and output signal.
More preferably, described RF Amplifier Module specifically comprises:
Low-noise amplification circuit is to the up low noise processing and amplifying of carrying out of input signal;
Power amplification circuit couples with described low-noise amplification circuit, and power amplification is carried out in input signal descending handled;
The input of described low-noise amplification circuit is connected by first circulator with the output of described power amplification circuit, the output of described low-noise amplification circuit is connected by second circulator with the input of described power amplification circuit, wherein, first circulator is used for the conversion of the input signal of the output signal of described low-noise amplification circuit and described power amplification circuit, and second circulator is used for the conversion of the output signal of the input signal of described low-noise amplification circuit and described power amplification circuit.
More preferably, described low-noise amplification circuit specifically comprises:
Radio-frequency (RF) switch is connected with described synchronization control module, and the uplink control signal that produces according to described synchronization control module is performed fighting or turn-offed;
The level Four amplifying circuit of cascade is connected with described radio-frequency (RF) switch, and the input signal branch from described radio-frequency (RF) switch transmission is carried out the low noise processing and amplifying.
More preferably, the level Four amplifying circuit of described cascade specifically comprises:
The orthogonal balanced amplifying circuit is the radio frequency amplifier tube of a pair of high-gain low-noise that adopts orthogonal balanced formula structure, noise factor that is used to provide lower and lower input signal standing-wave ratio;
Low-noise amplification circuit, its input connects the output of orthogonal balanced amplifying circuit, is used for further noise-reduction coefficient;
Variable-gain amplification circuit, its input connects the output of low-noise amplification circuit, is used for output signal is carried out power control;
Power amplification circuit, its input connects the output of variable-gain amplification circuit, and input signal is done linear amplification output.
More preferably, described low-noise amplification circuit also comprises:
Attenuator is connected in described level Four amplifying circuit wherein between the two-stage, is used to cooperate described monitoring module that the attenuation of signal is monitored.
More preferably, described power amplification circuit specifically comprises:
Radio-frequency (RF) switch is connected with described synchronization control module, and the downgoing control signal that produces according to described synchronization control module is performed fighting or turn-offed;
The three-stage amplifier of cascade is connected with described radio-frequency (RF) switch, the input signal from described radio-frequency (RF) switch transmission is carried out power amplification handle.
More preferably, the three-stage amplifier of described cascade specifically comprises:
Variable-gain amplification circuit, its input is connected with described radio-frequency (RF) switch, and output signal is carried out power control;
Promote the level amplifying circuit, its input is connected with the output of described variable-gain amplification circuit, is used to drive subordinate's amplifying circuit;
Power amplification circuit, its input connects the output that promotes the level amplifying circuit, input signal is done linear power amplify output.
More preferably, the utility model also comprises:
Cavity body filter couples with described RF Amplifier Module and described synchronization control module, and input signal is carried out Filtering Processing.
More preferably, described monitoring module is a microprocessor.
More preferably, described microprocessor is a single-chip microcomputer.
Compared with prior art, the utlity model has following beneficial effect:
1, the utility model is owing to by synchronization control module, realize RF Amplifier Module uplink and downlink to input signal under TDD mode are partly handled, and therefore, trunk amplifier of the present utility model can be used in the TD-SCDMA grid and covers;
2, trunk amplifier of the present utility model has intelligent monitoring, the good advantage of radio frequency amplification index by the management of monitoring module centralized monitor, is particularly useful for distributed network covering in the TD-SCDMA system chambers.
Description of drawings
Fig. 1 is the electrical block diagram of the utility model trunk amplifier;
Fig. 2 is the structural representation of low-noise amplification circuit in the utility model;
Fig. 3 is the structural representation of power amplification circuit in the utility model.
Embodiment
Please refer to shown in Figure 1ly, be the electrical block diagram of the utility model trunk amplifier.The utility model trunk amplifier comprises: RF Amplifier Module 20, synchronization control module 30 and monitoring module 40.
Wherein, from the signal of base station, hold 51 (i.e. ends of close information source), to enter coupler 10 through the Filtering Processing of cavity body filter 53 from the alms giver; Coupler 10 is connected with RF Amplifier Module 20 and synchronization control module 30.
Described synchronization control module 30 couples with described RF Amplifier Module 20, coupling radiofrequency signal to described coupler 10 generations is sampled, digital processing, produce two-way high-low level waveform respectively as the control signal of up, the downlink working of the described RF Amplifier Module 20 of control: when 20 pairs of downstream signals of described RF Amplifier Module carry out power amplification and handle, the low noise processing and amplifying of turn-offing 20 pairs of upward signals of described RF Amplifier Module; When 20 pairs of upward signals of described RF Amplifier Module carry out the low noise processing and amplifying, turn-off the power amplification of 20 pairs of downstream signals of described RF Amplifier Module and handle.And, can operate as normal for protection equipment, do not damage radio-frequency devices, design descending and up two-way time delay (such as, time delay is 1us), thereby described RF Amplifier Module 20 time is worked in TDD mode (TDD).
Described RF Amplifier Module 20 specifically comprises: to up low-noise amplification circuit (Power Amplifier, PA) 210 of carrying out the low noise processing and amplifying of input signal; And couple, and power amplification circuit (LowNoiseAmplifier, LNA) 220 that power amplification is handled are carried out in input signal descending with described low-noise amplification circuit 210; And first, second circulator 230 and 240, the input of described low-noise amplification circuit 210 is connected by first circulator 230 with the output of described power amplification circuit 220, and the output of described low-noise amplification circuit 210 is connected by second circulator 240 with the input of described power amplification circuit 220.Wherein, first circulator 230 is used for the conversion of the input signal of the output signal of described low-noise amplification circuit 210 and described power amplification circuit 220, and second circulator 240 is used for the conversion of the output signal of the input signal of described low-noise amplification circuit 210 and described power amplification circuit 220.
Described monitoring module 40 is connected with described RF Amplifier Module 20, to the monitoring of sampling of the input signal of described RF Amplifier Module 20 and output signal.Specifically, described monitoring module 40 can be a microprocessor, such as, be a single-chip microcomputer.
Simultaneously, please refer to Fig. 2, be the structural representation of low-noise amplification circuit in the utility model 210.Low-noise amplification circuit 210 particular circuit configurations are as follows:
Up input signal enters first radio-frequency (RF) switch 211 through first circulator 230, and this first radio-frequency (RF) switch 211 is controlled conducting/shutoff by the uplink control signal that described synchronization control module 30 produces; Then, the level Four amplifying circuit of up input signal cascade carries out the low noise processing and amplifying.
Wherein, the level Four amplifying circuit that comprises in the low-noise amplification circuit 210 specifically comprises:
The first order: orthogonal balanced amplifying circuit 212 is the radio frequency amplifier tube of a pair of high-gain low-noise that adopts orthogonal balanced formula structure, noise factor that is used to provide lower and lower input signal standing-wave ratio;
The second level: low-noise amplification circuit 214, its input connects the output of orthogonal balanced amplifying circuit 212, is used for further noise-reduction coefficient;
The third level: variable-gain amplification circuit 216, its input connects the output of low-noise amplification circuit 214, is used for output signal is carried out power control;
The fourth stage: power amplification circuit 218, its input connects the output of variable-gain amplification circuit 216, and input signal is done linear amplification output.
In addition, in order to realize the may command of complete machine gain, in the wherein adjacent level amplifying circuit of low-noise amplification circuit 210, add numerical-control attenuator 215 (position of attenuator 215 to take into account linear and noise objective and decide), and available monitoring module 40 is provided with its attenuation.The signal properties special according to TDD, radio-frequency (RF) switch 211,213 and 219 are selected for use at a high speed, are hanged down Insertion Loss, high-power switchgear, and decide according to the required isolation of complete machine operate as normal the position, and the unified uplink control signal of exporting with synchronization control module 30 is controlled.
Simultaneously, please refer to shown in Figure 3ly, is the structural representation of power amplification circuit 220 in the utility model.The concrete circuit structure of power amplification circuit 220 is as follows:
Descending input signal is through radio-frequency (RF) switch 221, and the three-stage amplifier that enters cascade carries out power amplification to input signal to be handled.Radio-frequency (RF) switch 221 and synchro switch 227 all are to be subjected to the control of the downgoing control signal that described synchronization control module 30 produces to perform fighting or turn-off.
Wherein, the three-stage amplifier of the cascade in the power amplification circuit 220 specifically comprises:
The first order: variable-gain amplification circuit 222, its input is connected with described radio-frequency (RF) switch 221, and output signal is carried out power control;
The second level: promote level amplifying circuit 225, its input is connected with the output of described variable-gain amplification circuit 222, is used to drive subordinate's amplifying circuit;
The third level: power amplification circuit 226, its input connects the output that promotes level amplifying circuit 225, input signal is done linear power amplify output.
In addition, please also refer to Fig. 1, Fig. 2 and Fig. 3, for improving the intellectuality of trunk amplifier of the present utility model, the utility model is by input power detection, power output detection, power control and the temperature detection etc. of 40 pairs of trunk amplifiers of monitoring module, and the user also can be by the operational data of monitoring module 40 inquiry trunk amplifiers.
Wherein, the input power of 40 pairs of trunk amplifiers of monitoring module detects, and is to adopt coupler 10 coupling unit signal after the first order, through sampling, amplifies, and filtering send monitoring module 40 to read acquisition.
The power output of 40 pairs of trunk amplifiers of monitoring module detects, and is to adopt the third level amplifying circuit 226 back coupling unit signals of microstrip line from power amplification circuit 220, directly send monitoring module 40 to read acquisition after sampling.
The control of the power of 40 pairs of trunk amplifiers of monitoring module is power output to be detected level further amplifies, filtering, and send monitoring module 40 to handle, and is come the control pin of the variable-gain amplification circuit 222 in the power controlling amplifying circuit 220 again by monitoring module 40.
For the benefit of, need detect the ambient temperature of device work, will do the temperature inquiry electronic devices and components to the module compensation that index worsens under high low temperature.The temperature detection of 40 pairs of trunk amplifiers of monitoring module is to adopt temperature sensitive device, detects magnitude of voltage, through amplifying, send into monitoring module 40 and obtain, be controlled under the high and low temperature environment by monitoring module 40 again, by temperature compensation resistance 217 and 223 parametric compensation adjustment to some electronic devices and components.
To sum up, the utlity model has following beneficial effect:
1, the utility model is owing to by synchronization control module, realize RF Amplifier Module at the time division duplex mould Uplink and downlink to input signal under the formula are partly processed, therefore, and trunk amplifier energy of the present utility model Being enough in the TD-SCDMA grid covers;
2, trunk amplifier of the present utility model is by monitoring module Centralized Monitoring management, have intelligent monitoring, Radio frequency amplifies the good advantage of index, is particularly useful for distributed network covering in the TD-SCDMA system chambers.
Claims (10)
1. one kind is used for the trunk amplifier that the TD-SCDMA grid covers, and the network backbone of the TD-SCDMA system of TDD mode work is carried out signal amplify, and it is characterized in that, comprising:
RF Amplifier Module adopts TDD mode, to the up low noise processing and amplifying of carrying out of input signal, power amplification is carried out in input signal descending handled;
Synchronization control module, couple with described RF Amplifier Module, produce the control signal of controlling the work of described RF Amplifier Module uplink and downlink respectively, when downstream signal being carried out the power amplification processing, shutoff is to the low noise processing and amplifying of upward signal, when upward signal is carried out the low noise processing and amplifying, turn-off the power amplification of downstream signal is handled;
Monitoring module is connected with described RF Amplifier Module, to the monitoring of sampling of the input signal of described RF Amplifier Module and output signal.
2. the trunk amplifier that is used for the covering of TD-SCDMA grid according to claim 1 is characterized in that described RF Amplifier Module specifically comprises:
Low-noise amplification circuit is to the up low noise processing and amplifying of carrying out of input signal;
Power amplification circuit couples with described low-noise amplification circuit, and power amplification is carried out in input signal descending handled;
The input of described low-noise amplification circuit is connected by first circulator with the output of described power amplification circuit, the output of described low-noise amplification circuit is connected by second circulator with the input of described power amplification circuit, wherein, first circulator is used for the conversion of the input signal of the output signal of described low-noise amplification circuit and described power amplification circuit, and second circulator is used for the conversion of the output signal of the input signal of described low-noise amplification circuit and described power amplification circuit.
3. the trunk amplifier that is used for the covering of TD-SCDMA grid according to claim 2 is characterized in that described low-noise amplification circuit specifically comprises:
Radio-frequency (RF) switch is connected with described synchronization control module, and the uplink control signal that produces according to described synchronization control module is performed fighting or turn-offed;
The level Four amplifying circuit of cascade is connected with described radio-frequency (RF) switch, and the input signal branch from described radio-frequency (RF) switch transmission is carried out the low noise processing and amplifying.
4. the trunk amplifier that is used for the covering of TD-SCDMA grid according to claim 3 is characterized in that the level Four amplifying circuit of described cascade specifically comprises:
The orthogonal balanced amplifying circuit is the radio frequency amplifier tube of a pair of high-gain low-noise that adopts orthogonal balanced formula structure, noise factor that is used to provide lower and lower input signal standing-wave ratio;
Low-noise amplification circuit, its input connects the output of orthogonal balanced amplifying circuit, is used for further noise reduction sonic system number;
Variable-gain amplification circuit, its input connects the output of low-noise amplification circuit, is used for output signal is carried out power control;
Power amplification circuit, its input connects the output of variable-gain amplification circuit, and input signal is done linear amplification output.
5. the trunk amplifier that is used for the covering of TD-SCDMA grid according to claim 3 is characterized in that described low-noise amplification circuit also comprises:
Attenuator is connected in described level Four amplifying circuit wherein between the two-stage, is used to cooperate described monitoring module that the attenuation of signal is monitored.
6. the trunk amplifier that is used for the covering of TD-SCDMA grid according to claim 2 is characterized in that described power amplification circuit specifically comprises:
Radio-frequency (RF) switch is connected with described synchronization control module, and the downgoing control signal that produces according to described synchronization control module is performed fighting or turn-offed;
The three-stage amplifier of cascade is connected with described radio-frequency (RF) switch, the input signal from described radio-frequency (RF) switch transmission is carried out power amplification handle.
7. the trunk amplifier that is used for the covering of TD-SCDMA grid according to claim 6 is characterized in that the three-stage amplifier of described cascade specifically comprises:
Variable-gain amplification circuit, its input is connected with described radio-frequency (RF) switch, and output signal is carried out power control;
Promote the level amplifying circuit, its input is connected with the output of described variable-gain amplification circuit, is used to drive subordinate's amplifying circuit;
Power amplification circuit, its input connects the output that promotes the level amplifying circuit, input signal is done linear power amplify output.
8. the trunk amplifier that is used for the covering of TD-SCDMA grid according to claim 1 is characterized in that, also comprises:
Cavity body filter couples with described RF Amplifier Module and described synchronization control module, and input signal is carried out Filtering Processing.
9. according to any described trunk amplifier that is used for the covering of TD-SCDMA grid of claim 1-8, it is characterized in that described monitoring module is a microprocessor.
10. the trunk amplifier that is used for the covering of TD-SCDMA grid according to claim 9 is characterized in that described microprocessor is a single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200160730U CN201018502Y (en) | 2006-11-28 | 2006-11-28 | Trunk amplifier for TD-SCDMA system network overlay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200160730U CN201018502Y (en) | 2006-11-28 | 2006-11-28 | Trunk amplifier for TD-SCDMA system network overlay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201018502Y true CN201018502Y (en) | 2008-02-06 |
Family
ID=39059003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200160730U Expired - Fee Related CN201018502Y (en) | 2006-11-28 | 2006-11-28 | Trunk amplifier for TD-SCDMA system network overlay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201018502Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355203A (en) * | 2011-10-09 | 2012-02-15 | 上海东洲罗顿通信技术有限公司 | Intelligent output technology of microwave power amplifier |
| CN107689804A (en) * | 2016-08-04 | 2018-02-13 | 北京信威通信技术股份有限公司 | Radio frequency amplifier and system based on TDD mode of operations |
| CN107689805A (en) * | 2016-08-04 | 2018-02-13 | 北京信威通信技术股份有限公司 | Radio frequency amplification method and device based on TDD mode of operations |
-
2006
- 2006-11-28 CN CNU2006200160730U patent/CN201018502Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355203A (en) * | 2011-10-09 | 2012-02-15 | 上海东洲罗顿通信技术有限公司 | Intelligent output technology of microwave power amplifier |
| CN102355203B (en) * | 2011-10-09 | 2013-10-16 | 上海东洲罗顿通信股份有限公司 | Intelligent output technology of microwave power amplifier |
| CN107689804A (en) * | 2016-08-04 | 2018-02-13 | 北京信威通信技术股份有限公司 | Radio frequency amplifier and system based on TDD mode of operations |
| CN107689805A (en) * | 2016-08-04 | 2018-02-13 | 北京信威通信技术股份有限公司 | Radio frequency amplification method and device based on TDD mode of operations |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202872780U (en) | Covering apparatus of ultra-wide band distribution system and radio frequency module thereof | |
| CN102547931B (en) | Device and method for realizing energy saving of miniature repeater | |
| CN214851148U (en) | S-band power amplification assembly | |
| CN109120289B (en) | Short-wave radio frequency front-end processing module and method | |
| CN201018502Y (en) | Trunk amplifier for TD-SCDMA system network overlay | |
| CN1679250A (en) | Power amplifier bypass in a half-duplex IC | |
| CN103327600A (en) | Automatic control device and method of radio frequency link gains | |
| CN201499136U (en) | P-band self-selected frequency linear power amplifier | |
| CN203275508U (en) | Power capability testing device and power amplifier unit | |
| CN203039920U (en) | Radio frequency link gain automatic control device | |
| CN201957247U (en) | Automatic switching WLAN (wireless local area network) bidirectional amplifier device | |
| CN113708802B (en) | Module and method for promoting Bluetooth link budget and solving multipath effect | |
| CN215871424U (en) | Optical fiber radio frequency signal zooming device | |
| CN201733303U (en) | SCDMA outdoor radio frequency amplification device | |
| CN2862508Y (en) | Circuit structure for PHS main line amplifier | |
| CN203942533U (en) | Multi-carrier power amplifying device and digital optical-fiber remote system | |
| CN203278844U (en) | Passive multi-order intermodulation tester | |
| CN201414218Y (en) | GSM trunk amplifier with uplink noise suppression function | |
| CN201315584Y (en) | Integrated TD-SCDMA trunk amplifier module | |
| CN201616916U (en) | Repeater based on GSM time slot control | |
| CN201563121U (en) | Radio frequency circuit framework | |
| CN204349991U (en) | For the integrated module circuit board of optical fiber repeater and trunk amplifier | |
| CN204350307U (en) | A kind of trunk amplifier being applicable to distribute compared with the indoor signal of large regions | |
| CN100431285C (en) | Linear low noise amplifying device of time division duplex system | |
| CN214589247U (en) | 5G-R railway antenna system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080206 Termination date: 20091228 |