CN208862800U - Radio frequency for communication base station balances amplification module - Google Patents
Radio frequency for communication base station balances amplification module Download PDFInfo
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- CN208862800U CN208862800U CN201821681627.8U CN201821681627U CN208862800U CN 208862800 U CN208862800 U CN 208862800U CN 201821681627 U CN201821681627 U CN 201821681627U CN 208862800 U CN208862800 U CN 208862800U
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- low
- noise amplifier
- signal
- radio frequency
- amplification module
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Abstract
The utility model relates to a kind of radio frequencies for communication base station to balance amplification module, it further include the first by-pass unit, the second by-pass unit, the first current detecting unit, the second current detecting unit and microprocessor including the first low-noise amplifier and the second low-noise amplifier；First current detecting unit and the second current detecting unit detect the working current value of two low-noise amplifiers of first low-noise amplifier and ground respectively, and send it to the microprocessor；The microprocessor outputs a control signal to corresponding by-pass unit when finding the working condition exception respectively, makes its work, radiofrequency signal of the bypass input to corresponding low-noise amplifier.A kind of radio frequency for communication base station for implementing the utility model balances amplification module, and input signal will not be influenced when LNA failure occurs in some branch by having the advantages that.
Description
Technical field
The utility model relates to radio circuits, balance amplification more specifically to a kind of radio frequency for communication base station
Module.
Background technique
In communication base station or repeater, the first order low-noise amplifier (LNA) in receiver can be put with balance
It is big to realize Redundancy Design.Two LNA parallel connections are usually taken, realizing that power one divides with a 3dB electric bridge in rf inputs is
Two, the mode being combined into one is realized with 3dB electric bridge in RF output end, as shown in Figure 1.Such setting, when in two LNA
When some burns, another still can work, and not will lead to entire base station or repeater paralysis.But this set also has
Disadvantage, when one of LNA is burnt,
For the radio-frequency input signals of script, where branch impedance open-circuit condition, therefore radio frequency will be presented
Signal will all reflect at the LNA, and reflection signal at this time will have 50% 50 ohm loads for entering electric bridge isolation end
It is converted to heat consumption to fall, in addition 50% will reflect back into rf inputs, and reflected radiofrequency signal is with input radio frequency
The phase difference of signal will will lead to the superposition or reduction of signal, this will will lead to the unstable of signal.Meanwhile it is reflected
Signal will exogenous disturbances signal, so that the good input signal noise of script noise coefficient is become larger, to influence the whole of receiver
Body performance.
Utility model content
The technical problem to be solved by the present invention is to occur for the above-mentioned LNA in a branch of the prior art
The defect that will lead to the signal-to-noise ratio decline of input signal when failure, provides one kind even if when LNA failure occurs in some branch
The radio frequency for communication base station that will not influence input signal balances amplification module.
The technical scheme adopted by the utility model to solve the technical problem is as follows: constructing a kind of radio frequency for communication base station
Amplification module is balanced, input signal is divided into two-way of the constant amplitude with phase by the radio frequency balance amplification module, by obtaining after branch
To two paths of signals pass through the first low-noise amplifier and the amplification of the second low-noise amplifier respectively after, then it is two-way is amplified
Signal combining output, further includes the first by-pass unit, the second by-pass unit, the first current detecting unit, the second current detecting list
Member and microprocessor；First current detecting unit and the second current detecting unit detect first low noise amplification respectively
The working current value of two low-noise amplifiers of device and ground, and send it to the microprocessor；The microprocessor is according to it
The working current value received judges the working condition of first low-noise amplifier and the second low-noise amplifier respectively,
And when finding the working condition exception, corresponding by-pass unit is output a control signal to respectively, makes its work, bypass input
To the radiofrequency signal of corresponding low-noise amplifier.
Further, first by-pass unit is connected to the input terminal and ground of first low-noise amplifier
Between, correspond to first low-noise amplifier and first current detecting unit；Second by-pass unit is connected to institute
It states between the input terminal and ground of the second low-noise amplifier, corresponds to second low-noise amplifier and second electric current is examined
Survey unit.
Further, first by-pass unit and the second by-pass unit are respectively to be exported by the microprocessor
The single-pole double throw electronic switch of signal control is controlled, input/output terminals different from the microprocessor connect control terminal respectively
It connects.
Further, the single-pole double throw electronic switch includes a signal input part and two signal output ends,
Signal input part receives the radio-frequency input signals all the way where the single-pole double throw electronic switch, one signal output end respectively
It is grounded by load resistance, another signal output end is connected to the rf inputs of its corresponding low-noise amplifier
On.
Further, the microprocessor is when the working condition for judging a low-noise amplifier is normal, output control
Signal processed makes the signal input part of the corresponding single-pole double throw electronic switch of the low-noise amplifier and connects the low noise
The signal output end of the rf inputs of amplifier connects；When judging the working state abnormal of a low-noise amplifier,
Output control signal makes the signal input part and load electricity of the corresponding single-pole double throw electronic switch of the low-noise amplifier
Resistance connection.
Further, the resistance value of the load resistance is 50 ohm.
Further, the radio frequency balance amplification module passes through 3dB electric bridge for radiofrequency signal branch and combining.
A kind of radio frequency for communication base station for implementing the utility model balances amplification module, has the advantages that
Due to having used current detecting to the low-noise amplifier on two branches (or branch) respectively, and according to the result of current detecting
The by-pass unit that respective output signal goes control to be connected in the branch or branch, so that when a LNA breaks down, input
Signal to the LNA can obtain appropriate processing, will not be reflected into input terminal, therefore, even if there is LNA event in some branch
Input signal will not be influenced when barrier.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the radio frequency balance amplification module in the prior art for communication base station；
Fig. 2 is a kind of structural schematic diagram of the radio frequency balance amplification module embodiment for communication base station of the utility model.
Specific embodiment
The utility model embodiment is described further below in conjunction with attached drawing.
As shown in Fig. 2, in a kind of radio frequency balance amplification module embodiment for communication base station of the utility model, it should
Radio frequency balances amplification module and input signal is divided into two-way of the constant amplitude with phase, and the obtained two paths of signals after branch is led to respectively
After crossing the first low-noise amplifier (LNA1) and the second low-noise amplifier (LNA2) amplification, then the amplified signal of two-way closed
Road output；In Fig. 2, radio-frequency input signals is inputted by the left side of Fig. 2, when radio-frequency input signals enters radio frequency balance amplification mould
After block, two-way of the constant amplitude with phase is classified as by a 3dB electric bridge first, is exported respectively by two output ends of the electric bridge,
This two paths of signals is connected to second 3dB electric bridge after passing through the first by-pass unit and the first low-noise amplifier (LNA1) all the way
One input terminal of (in Fig. 2 one of the right), another way pass through the second by-pass unit and the second low-noise amplifier (LNA2)
It is connected to another input terminal of second 3dB electric bridge afterwards, after which inputs merging or combining for two-way, obtains
It is exported to amplified radiofrequency signal.In Fig. 2, above-mentioned radio frequency balance amplification module further includes the first current detecting unit, the
Two current detecting units and microprocessor；Wherein, first current detecting unit and the second current detecting unit detect respectively
The working current value of two low-noise amplifiers of first low-noise amplifier and ground, and send it to the microprocessor；
The microprocessor judges first low-noise amplifier and the second low noise according to received working current value respectively
The working condition of amplifier, and when finding the working condition exception, corresponding by-pass unit is output a control signal to respectively,
Make its work, radiofrequency signal of the bypass input to corresponding low-noise amplifier.It is noted that above-mentioned microprocessor and its
Control to above-mentioned by-pass unit, can using it is in the prior art it is any can be realized control by the way of.
In the present embodiment, as shown in Fig. 2, first by-pass unit is connected to the defeated of first low-noise amplifier
Enter between end and ground, corresponds to first low-noise amplifier and first current detecting unit；Second bypass is single
Member is connected between the input terminal and ground of second low-noise amplifier, corresponds to second low-noise amplifier and described
Second current detecting unit.First by-pass unit and the second by-pass unit are respectively the control exported by the microprocessor
The single-pole double throw electronic switch of signal control processed, control terminal input/output terminal connections different from the microprocessor respectively.
In Fig. 2, the single-pole double throw electronic switch includes a signal input part and two signal output ends, signal
Input terminal receives the radio-frequency input signals all the way where the single-pole double throw electronic switch respectively, one signal output end passes through
Load resistance ground connection, another signal output end are connected on the rf inputs of its corresponding low-noise amplifier.
In the present embodiment, the microprocessor is when the working condition for judging a low-noise amplifier is normal, output
Control signal makes the signal input part of the corresponding single-pole double throw electronic switch of the low-noise amplifier and connects the low noise
The signal output end of the rf inputs of acoustic amplifier connects；In the working state abnormal for judging a low-noise amplifier
When, output control signal makes signal input part and the load of the corresponding single-pole double throw electronic switch of the low-noise amplifier
Resistance connection.The judgement of current value detected and output control signal are realized to by-pass unit as above-mentioned microprocessor
The programmings of the functions such as control realize there are many concrete implementation modes in the prior art, details are not described herein.
In the present embodiment, in order to realize the matching of transfer impedance, the resistance value of the load resistance is 50 ohm.It is described
Radio frequency balances amplification module and passes through 3dB electric bridge for radiofrequency signal branch and combining.
Specifically, in a specific example, the RF switch chip of a single-pole double throw is placed before LNA, is opened
The termination LNA closed, is grounded after another termination 50Ohm load.When normal work, CTL pin (the control pipe of RF switch chip
Foot) it is low level, switch connection LNA.When one of LNA is burnt, corresponding current detecting unit notes abnormalities, and reports
To MCU, the CTL pin of switch is changed to high level automatically immediately by MCU, then the switch is connected to 50Ohm load, the radio frequency letter of input
It number will guide to and to become heat consumption in 50Ohm load and fall, avoid reflecting.Under normal condition, RF switch chip CTL pin is
Low level, switch connection LNA.Assuming that LNA2 is burnt, the second current detecting unit notes abnormalities at this time, can report MCU immediately,
The CTL voltage of switch (the second by-pass unit) before LNA2 is changed to high level automatically immediately by MCU, and RF switch is got to automatically
50Ohm load.After switch connection 50Ohm load, change path into the radiofrequency signal of LNA2 originally, it is negative to fully enter 50Ohm
It carries, becomes heat consumption and fall.If open-circuit condition is presented in the impedance at LNA2, but the radiofrequency signal inputted is all guided to
In 50Ohm load, therefore reflection signal is not had.In radiofrequency signal input, signal is still stable, and keeps good and make an uproar
Sonic system number；Meanwhile LNA1 can keep working normally.Similarly, it is assumed that LNA1 is burnt, and LNA2 can also keep working normally.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (7)
1. a kind of radio frequency for communication base station balances amplification module, input signal is divided by the radio frequency balance amplification module
Obtained two paths of signals after branch is passed through the first low-noise amplifier respectively and the second low noise is put by constant amplitude with the two-way of phase
After big device amplification, then by the amplified signal combining output of two-way, which is characterized in that further include the first by-pass unit, by second
Road unit, the first current detecting unit, the second current detecting unit and microprocessor；First current detecting unit and second
Current detecting unit detect respectively first low-noise amplifier and ground two low-noise amplifiers working current value, and by its
It is sent to the microprocessor；The microprocessor judges first low noise according to received working current value respectively
The working condition of acoustic amplifier and the second low-noise amplifier, and when finding the working condition exception, output control respectively
Signal makes its work, radiofrequency signal of the bypass input to corresponding low-noise amplifier to corresponding by-pass unit.
2. the radio frequency according to claim 1 for communication base station balances amplification module, which is characterized in that by the of described first
Road unit is connected between the input terminal and ground of first low-noise amplifier, correspond to first low-noise amplifier and
First current detecting unit；Second by-pass unit is connected to the input terminal and ground of second low-noise amplifier
Between, correspond to second low-noise amplifier and second current detecting unit.
3. the radio frequency according to claim 2 for communication base station balances amplification module, which is characterized in that by the of described first
Road unit and the second by-pass unit are respectively to be controlled the single-pole double throw electronic cutting that signal controls by the microprocessor output
It closes, control terminal input/output terminal connections different from the microprocessor respectively.
4. the radio frequency according to claim 3 for communication base station balances amplification module, which is characterized in that the hilted broadsword is double
Throwing electronic switch includes a signal input part and two signal output ends, and signal input part receives single-pole double throw electricity respectively
Radio-frequency input signals all the way where sub switch, one signal output end are grounded by load resistance, another signal is defeated
Outlet is connected on the rf inputs of its corresponding low-noise amplifier.
5. the radio frequency according to claim 4 for communication base station balances amplification module, which is characterized in that the micro process
For device when the working condition for judging a low-noise amplifier is normal, output control signal makes the low-noise amplifier corresponding
The signal output end of the rf inputs of the signal input part and connection of the single-pole double throw electronic switch low-noise amplifier
Connection；When judging the working state abnormal of a low-noise amplifier, output control signal makes the low-noise amplifier
The signal input part of the corresponding single-pole double throw electronic switch is connected with load resistance.
6. the radio frequency according to claim 5 for communication base station balances amplification module, which is characterized in that the load electricity
The resistance value of resistance is 50 ohm.
7. the radio frequency according to claim 6 for communication base station balances amplification module, which is characterized in that the radio frequency is flat
The amplification module that weighs passes through 3dB electric bridge for radiofrequency signal branch and combining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821681627.8U CN208862800U (en) | 2018-10-16 | 2018-10-16 | Radio frequency for communication base station balances amplification module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821681627.8U CN208862800U (en) | 2018-10-16 | 2018-10-16 | Radio frequency for communication base station balances amplification module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208862800U true CN208862800U (en) | 2019-05-14 |
Family
ID=66421081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821681627.8U Active CN208862800U (en) | 2018-10-16 | 2018-10-16 | Radio frequency for communication base station balances amplification module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208862800U (en) |
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2018
- 2018-10-16 CN CN201821681627.8U patent/CN208862800U/en active Active
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Address after: 518000 Guangdong city of Shenzhen province Qianhai Shenzhen Hong Kong cooperation zone before Bay Road No. 1 building 201 room A (located in Shenzhen Qianhai business secretary Co. Ltd.) Patentee after: Shenzhen Qianhai shenlei Semiconductor Co.,Ltd. Address before: 518000 Guangdong city of Shenzhen province Qianhai Shenzhen Hong Kong cooperation zone before Bay Road No. 1 building 201 room A (located in Shenzhen Qianhai business secretary Co. Ltd.) Patentee before: Shenzhen Qianhai shenlei Technology Co.,Ltd. Address after: 518000 Guangdong city of Shenzhen province Qianhai Shenzhen Hong Kong cooperation zone before Bay Road No. 1 building 201 room A (located in Shenzhen Qianhai business secretary Co. Ltd.) Patentee after: Shenzhen Qianhai shenlei Technology Co.,Ltd. Address before: 518000 Guangdong city of Shenzhen province Qianhai Shenzhen Hong Kong cooperation zone before Bay Road No. 1 building 201 room A (located in Shenzhen Qianhai business secretary Co. Ltd.) Patentee before: SHENZHEN QIANHAI SHENLEI TECHNICAL SERVICE Co.,Ltd. |