CN2781686Y - Adapter mobile communication direct amplification station - Google Patents
Adapter mobile communication direct amplification station Download PDFInfo
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- CN2781686Y CN2781686Y CNU2005200892838U CN200520089283U CN2781686Y CN 2781686 Y CN2781686 Y CN 2781686Y CN U2005200892838 U CNU2005200892838 U CN U2005200892838U CN 200520089283 U CN200520089283 U CN 200520089283U CN 2781686 Y CN2781686 Y CN 2781686Y
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- radio frequency
- low noise
- noise amplifier
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Abstract
The utility model relates to a self-adaptive mobile communication direct amplifying station. The essential technical scheme is that adaptive devices are respectively arranged in a downlink and an uplink of the existing general mobile communication direct amplifying station; the adaptive device in the downlink is connected between a TX port of a duplexer and an IN port of a low noise amplifier; the adaptive device in the uplink is connected between an RS port of the duplexer and an IN port of the low noise amplifier; the adaptive devices comprise microstrip couplers, radio frequency amplifiers which are connected with coupling ends of the microstrip couplers, and electric tuning radio frequency attenuators which are connected with output ends of the radio frequency amplifiers, wherein the output ends of the radio frequency amplifiers are connected with the IN ports of the low noise amplifier. When an antenna receives strong or weak radio frequency signals, signals coupled by the coupling ends of the microstrip couplers can be large or small, and the radio frequency signal attenuation of the electric tuning radio frequency attenuator can be large or small so as to achieve unchanged radio frequency signals outputted from the output ends of the electric tuning radio frequency attenuator; thus, the AGC automatic gain control can be achieved.
Description
Technical field:
The utility model relates to a kind of Mobile communication direct base station, particularly a kind of self adaptation Mobile communication direct base station with AGC automatic gain control function.
Background technology:
All do not have self-reacting device in the domestic existing GSM/CDMA Mobile communication direct base station, promptly do not have the AGC automatic gain control function, having only ALC is automatic level control function.The repeater is when dispatching from the factory, gain sets, the repeater of equal-wattage, gain also is identical, but at the scene, the level of RF signals that inserts each repeater is different, so when installing and opening the repeater, will be according to the size of on-the-spot radiofrequency signal, survey is transferred in gain to every equipment, gives site operation and transfers measuring tape to come very big inconvenience, if accent is bad, can cause input signal excessive, equipment enters the state of starting to control, and works in the inelastic region, causes speech quality to descend, when the input radio frequency signal greatly when automatic electric-level is lost control of, the LNA LNA in the equipment, power amplifier PA module reduces useful life even damage.Input signal is too small, and equipment can not full power be exported, and the area coverage of equipment can not be produced a desired effect.
If when installing and opening the repeater, the size that field joint is gone into the radio frequency signal is tuned to the best, but under the situation that mobile communication carrier frequency quantity changes or power output changes, the size of the radiofrequency signal that inserts the repeater is changed, cause bad result recited above.
Summary of the invention:
In view of the deficiency that above-mentioned prior art exists, the purpose of this utility model provides a kind of control input signals size automatically, thereby reaches the self adaptation Mobile communication direct base station of automatic ride gain.
The purpose of this utility model is to realize like this, it comprises donor antenna, retransmitting antenna and two duplexers that link to each other with donor antenna, retransmitting antenna respectively and is connected to down link and the up link that is made of low noise amplifier, frequency-selector, power amplifier between two duplexer TX mouths and the RS mouth, it is characterized in that: be respectively equipped with self-reacting device in down link and up link; Self-reacting device in the down link is connected between duplexer TX mouth and the low noise amplifier IN mouth; Self-reacting device in the up link is connected between duplexer RS mouth and the low noise amplifier IN mouth; Self-reacting device comprises microstrip coupler and the radio frequency amplifier that links to each other with this microstrip coupler coupled end and the electricity that links to each other with this radio frequency amplifier output is transferred radio frequency attenuator, and electricity transfers the output of radio frequency attenuator to link to each other with above-mentioned low noise amplifier IN mouth.When the radiofrequency signal that receives when antenna is strong, the signal that the microstrip coupler coupled end is coupled out is just big, electricity transfers the radiofrequency signal decay of radio frequency attenuator just big, when a little less than the radiofrequency signal that antenna receives, the signal that the microstrip coupler coupled end is coupled out is just little, electricity transfers the radiofrequency signal decay of radio frequency attenuator just little, thereby reaching from electricity transfers the radiofrequency signal of output output of radio frequency attenuator constant, it is constant that this radiofrequency signal reaches the radiofrequency signal that enters low noise amplifier through electric capacity output, finishes automatic ride gain.
The utility model has the advantages that in existing Mobile communication direct base station self-reacting device is set, make the input signal of repeater can be controlled at an optimum range automatically, thereby realize the control of AGC automatic gain, make the repeater be always operating at optimum state, LNA LNA, power amplifier PA are shielded, prevent the damage of source module, the reliability of whole set equipment is provided; Make the installation of repeater and open fast and make things convenient for.Repeater with this function can be according to external environment, oneself regulates to make it be operated in optimum state, and its use meeting provides better service for numerous mobile subscribers.
Below in conjunction with accompanying drawing the utility model is explained.
Description of drawings:
Fig. 1 is the utility model theory diagram;
Fig. 2 is the self-reacting device circuit theory diagrams.
Embodiment:
By accompanying drawing as can be known, the utility model mainly is the self-reacting device (see figure 1) of having set up automatic ride gain in the existing Mobile communication direct base station that is made of donor antenna, retransmitting antenna, duplexer, low noise amplifier (abbreviating LNA as), frequency-selector, power amplifier (abbreviating power amplifier as).Two duplexers that link to each other with donor antenna, retransmitting antenna respectively and be connected to down link and the up link that constitutes by low noise amplifier, frequency-selector, power amplifier between two duplexer TX mouths and the RS mouth, self-reacting device is located at respectively in down link and the up link; Self-reacting device in the down link is connected between duplexer TX mouth and the low noise amplifier IN mouth, connects with half steel cable or semi-flexible cable, and the joint model is SMA; Self-reacting device in the up link is connected between duplexer RS mouth and the low noise amplifier IN mouth, connects with half steel cable or semi-flexible cable, and the joint model is SMA; Self-reacting device comprises microstrip coupler WO and the radio frequency amplifier that links to each other with this microstrip coupler coupled end and the electricity that links to each other with this radio frequency amplifier output is transferred radio frequency attenuator IC (HMC473MS8), and electricity transfers output 8 terminals of radio frequency attenuator IC to link to each other with above-mentioned low noise amplifier IN mouth; Radio frequency amplifier is made of detector diode D1, voltage amplifier A (LM2902M), current amplifier B, C (LM2902M) and other capacitance resistance component.Enter the microstrip transmission line straight-through port of the microstrip coupler of self-reacting device circuit from the radiofrequency signal of the descending delivery outlet TX output of duplexer, through the 1 terminal rf input port of electric capacity to electrically controlled attenuator, the input that the signal that the coupled end of microstrip coupler is coupled out enters radio frequency amplifier amplifies, radio frequency amplifier is output as a voltage signal that changes according to the input signal size, receive electricity and transfer 3 terminal control ends of radio frequency attenuator, radiofrequency signal attenuation according to the voltage signal control electricity accent radio frequency attenuator that changes, when the radiofrequency signal that receives when antenna is strong, the signal that the microstrip coupler coupled end is coupled out is just big, electricity transfers the radiofrequency signal decay of radio frequency attenuator just big, when a little less than the radiofrequency signal that antenna receives, the signal that the microstrip coupler coupled end is coupled out is just little, electricity transfers the radiofrequency signal decay of radio frequency attenuator IC just little, thereby reaching from electricity transfers the radiofrequency signal of 8 terminal outputs output of radio frequency attenuator IC constant, it is constant that this radiofrequency signal reaches the radiofrequency signal that enters low noise amplifier through electric capacity output, finishes automatic ride gain; It is identical with the operation principle of the self-reacting device circuit of the descending delivery outlet TX of above-mentioned connection duplexer to connect its operation principle of the up delivery outlet RX of duplexer self-reacting device circuit.
Claims (1)
1, a kind of self adaptation Mobile communication direct base station, it comprises donor antenna, retransmitting antenna and two duplexers that link to each other with donor antenna, retransmitting antenna respectively and is connected to down link and the up link that is made of low noise amplifier, frequency-selector, power amplifier between two duplexer TX mouths and the RS mouth, it is characterized in that: be respectively equipped with self-reacting device in down link and up link; Self-reacting device in the down link is connected between duplexer TX mouth and the low noise amplifier IN mouth; Self-reacting device in the up link is connected between duplexer RS mouth and the low noise amplifier IN mouth; Self-reacting device comprises microstrip coupler and the radio frequency amplifier that links to each other with this microstrip coupler coupled end and the electricity that links to each other with this radio frequency amplifier output is transferred radio frequency attenuator, and electricity transfers the output of radio frequency attenuator to link to each other with above-mentioned low noise amplifier IN mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200892838U CN2781686Y (en) | 2005-02-06 | 2005-02-06 | Adapter mobile communication direct amplification station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200892838U CN2781686Y (en) | 2005-02-06 | 2005-02-06 | Adapter mobile communication direct amplification station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2781686Y true CN2781686Y (en) | 2006-05-17 |
Family
ID=36762884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200892838U Expired - Fee Related CN2781686Y (en) | 2005-02-06 | 2005-02-06 | Adapter mobile communication direct amplification station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2781686Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527974B (en) * | 2009-04-10 | 2011-09-28 | 山东大学 | China mobile multimedia broadcasting (CMMB) repeater for optimizing urban CMMB network and control method thereof |
| CN110557166A (en) * | 2019-08-28 | 2019-12-10 | 维沃移动通信有限公司 | Communication circuit adjusting method and terminal |
| CN112768893A (en) * | 2020-12-28 | 2021-05-07 | 京信通信技术(广州)有限公司 | Mobile communication antenna |
-
2005
- 2005-02-06 CN CNU2005200892838U patent/CN2781686Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527974B (en) * | 2009-04-10 | 2011-09-28 | 山东大学 | China mobile multimedia broadcasting (CMMB) repeater for optimizing urban CMMB network and control method thereof |
| CN110557166A (en) * | 2019-08-28 | 2019-12-10 | 维沃移动通信有限公司 | Communication circuit adjusting method and terminal |
| CN112768893A (en) * | 2020-12-28 | 2021-05-07 | 京信通信技术(广州)有限公司 | Mobile communication antenna |
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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: 20060517 Termination date: 20140206 |