CN107094029A - A kind of RF Amplifier Module and its amplification method - Google Patents
A kind of RF Amplifier Module and its amplification method Download PDFInfo
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- CN107094029A CN107094029A CN201710252722.XA CN201710252722A CN107094029A CN 107094029 A CN107094029 A CN 107094029A CN 201710252722 A CN201710252722 A CN 201710252722A CN 107094029 A CN107094029 A CN 107094029A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
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Abstract
The present invention relates to a kind of RF Amplifier Module and its amplification method, the RF Amplifier Module includes descending amplifying unit, up amplifying unit and the RF switch being connected between descending amplifying unit and up amplifying unit, the descending amplifying unit includes the radio frequency amplifying circuit for being used for the radiofrequency signal progress power amplification processing inputted to downlink and exporting and for the input power to radio frequency amplifying circuit, the auxiliary circuit that positive power output and reverse power output are detected, the up amplifying unit includes being used for carrying out low noise enhanced processing and the low noise amplifier circuit exported to the radiofrequency signal that up-link is inputted.The amplification efficiency of the present invention is high, and with the good linearity, the performance indications requirement of TD LTE base station systems can be met, with relatively good application prospect.
Description
【Technical field】
The present invention relates to power amplifier technology, more particularly, to the RF Amplifier Module in a kind of TD-LTE system and its put
Big method.
【Background technology】
With developing rapidly for mobile communication, more and more higher is required to networking.In order to better meet user at a high speed
The demand of business, the Virtual network operator such as China Mobile and industry department are continued to increase to TD-LTE (Time Division Long
Term Evolution, timesharing Long Term Evolution) network construction.Wherein, TD-LTE station technologies are played in networking
Important effect.Base station be public mobile communication base station be radio station a kind of form, refer to cover in certain radio
In cover region, radio station is believed by the transceiving that information transmission is carried out between mobile switching center, with mobile telephone terminal.
TD-LTE base station equipments (eNodeB) can be divided into distributed base station equipment and integrated base station equipment.Wherein, radio frequency
Amplification module is the RF remote equipment (RRU) of TD-LTE distributed base station equipment or the important set of integrated base station radio-frequency front-end
Into part, the technical indicator of RF Amplifier Module determines TD-LTE base station system performances.Current existing RF Amplifier Module
Inefficiency, it is impossible to meet the requirement of TD-LTE base station system performances.
【The content of the invention】
It is an object of the invention to overcome the shortcomings of above-mentioned technology, there is provided a kind of RF Amplifier Module and its amplification method.
The first aspect of the present invention provide a kind of RF Amplifier Module, including descending amplifying unit, up amplifying unit with
And the RF switch between descending amplifying unit and up amplifying unit is connected to, the descending amplifying unit includes being used under
Line link input radiofrequency signal carry out power amplification processing and export radio frequency amplifying circuit and for radio frequency amplify electricity
The auxiliary circuit that the input power on road, positive power output and reverse power output are detected, the up amplifying unit bag
Include the radiofrequency signal for being inputted to up-link and carry out low noise enhanced processing and the low noise amplifier circuit exported.
Further, the radio frequency amplifying circuit includes the isolator, the first voltage-controlled attenuator, the first numerical control being sequentially connected
Attenuator, the first amplifier, the second voltage-controlled attenuator, analog predistortion device, amplifier section, forward coupler and circulator, institute
Circulator is stated to be connected with the RF switch.
Further, the radiofrequency signal that the isolator is used to input downlink carries out isolation and amplifier；Described first
Voltage-controlled attenuator is used to adjust the power level of the radiofrequency signal exported from the isolator with by the descending amplifying unit
Peak power output is controlled in rated output power level；First numerical-control attenuator is used for according to the described first voltage-controlled decay
The radiofrequency signal of device output adjusts the gain of the radio frequency amplifying circuit；First amplifier is used to decline first numerical control
The radiofrequency signal for subtracting device output is linearly amplified to first order power level；Second voltage-controlled attenuator is used for according to described first
The radiofrequency signal of amplifier output carries out Temperature compensation for gain to the radio frequency amplifying circuit；The analog predistortion device is used for root
The radiofrequency signal exported according to second voltage-controlled attenuator and the feedback signal of forward coupler output are to the amplification
Part carries out linearisation correction；The amplifier section is used to carry out power amplification by power requirement to the radiofrequency signal of input；Institute
Stating forward coupler is used to the radiofrequency signal of input is coupled into three tunnel radiofrequency signals and exported respectively, the first via radio frequency letter
Number it is used to be output to the circulator, second tunnel radiofrequency signal is used to be output to the analog predistortion as feedback signal
Device, the 3rd tunnel radiofrequency signal is used to be output to the auxiliary circuit to carry out forward power detection；The circulator is used for
Receive the first via radiofrequency signal of the forward coupler output and be divided into two-way output, the first via radiofrequency signal is used for defeated
Go out to external equipment, second tunnel radiofrequency signal is used to be output to the auxiliary circuit to carry out instead by the RF switch
To power detection.
Further, the amplifier section includes the second amplifier, the 3rd amplifier and the 4th amplifier being sequentially connected,
Second amplifier is connected with the analog predistortion device, and the 4th amplifier is connected with the forward coupler；It is described
Analog predistortion device is used for what is exported according to the radiofrequency signal and the forward coupler of second voltage-controlled attenuator output
Feedback signal carries out linearisation correction to second amplifier；Second amplifier is used for the radiofrequency signal of input is linear
It is amplified to second level power level；3rd amplifier is used to the radiofrequency signal of input being linearly amplified to third level power water
It is flat；4th amplifier is used for the power level that the radiofrequency signal of input is linearly amplified to requirement.
Further, the auxiliary circuit includes single-chip microcomputer, input demodulator probe, positive demodulator probe and reverse detection section
Point；Described input demodulator probe one end is connected between the isolator and first voltage-controlled attenuator, and the other end is connected to
The single-chip microcomputer, the energy for the radiofrequency signal for isolator output of sampling carries out the detection of input power and by detection
Power changes into voltage and is input to single-chip microcomputer；Described positive demodulator probe one end is connected with the forward coupler, the other end
The single-chip microcomputer is connected to, the 3rd tunnel radiofrequency signal for being exported to forward coupler carries out forward power detection and will detection
Power change into voltage and be input to single-chip microcomputer；Described reverse demodulator probe one end is connected with the RF switch, the other end
The single-chip microcomputer is connected to, backward power is carried out for coupling the energy of the second tunnel radiofrequency signal of the sampling circulator output
Detect and the power of detection is changed into voltage and be input to single-chip microcomputer；The single-chip microcomputer is used for defeated to the input demodulator probe
Voltage, the voltage of the positive demodulator probe input, the voltage of the reverse demodulator probe input entered is carried out respectively
Calculate and draw corresponding input power value, forward power value and backward power value.
Further, the auxiliary circuit also includes auto level control part, the increasing being connected respectively with the single-chip microcomputer
Beneficial temperature-compensating part, grid voltage temperature-compensating part, temperature detection part and current detecting part；The auto level control portion
Dividing includes first voltage-controlled attenuator；The Temperature compensation for gain part includes second voltage-controlled attenuator；The grid voltage
Temperature-compensating part is used to carry out temperature-compensating to the grid voltage of the radio frequency amplifying circuit；The temperature detection part is used for institute
The temperature for stating radio frequency amplifying circuit is detected；The current detecting part is used to carry out the electric current of the radio frequency amplifying circuit
Detection.
Further, the low noise amplifier circuit includes the low-noise amplifier being sequentially connected, gain amplifier, the 3rd
Voltage-controlled attenuator, wave filter and the second numerical-control attenuator, the low-noise amplifier are connected with the RF switch；The low noise
Acoustic amplifier is used to carry out low noise amplification to the radiofrequency signal that up-link is inputted；The gain amplifier is used for the low noise
The radiofrequency signal of acoustic amplifier output carries out gain amplification；3rd voltage-controlled attenuator is used to adjust from the gain amplifier
The power level of the radiofrequency signal of output with by the peak power output of the up amplifying unit control in rated output power
Level；The wave filter is used to be filtered the radiofrequency signal that the 3rd voltage-controlled attenuator is exported；Second numerical control declines
The radiofrequency signal that subtracting device is used to be exported according to the wave filter adjusts the gain of the low noise amplifier circuit and exports radio frequency letter
Number.
The second aspect of the present invention provides a kind of amplification method of RF Amplifier Module, and the RF Amplifier Module includes descending
Amplifying unit, up amplifying unit and the RF switch being connected between descending amplifying unit and up amplifying unit, it is described
Descending amplifying unit includes radio frequency amplifying circuit and auxiliary circuit, and the up amplifying unit includes low noise amplifier circuit, should
Amplification method comprises the following steps：
In the downlink, the radiofrequency signal inputted by radio frequency amplifying circuit to downlink carries out power amplification processing
And export；The input power, positive power output and reverse power output of radio frequency amplifying circuit are examined by auxiliary circuit
Survey；
In the uplink, the radiofrequency signal inputted by low noise amplifier circuit to up-link carries out LNA general goal
Manage and export.
Further, the radiofrequency signal that the radio frequency amplifying circuit is inputted to downlink carries out the side of power amplification processing
Method, comprises the following steps：
The radiofrequency signal for being inputted downlink by isolator carries out isolation and amplifier；
The power level of the radiofrequency signal exported from isolator is adjusted so that descending amplification is single by the first voltage-controlled attenuator
The peak power output of member is controlled in rated output power level；
The radiofrequency signal exported by the first numerical-control attenuator according to the first voltage-controlled attenuator adjusts radio frequency amplifying circuit
Gain；
The radiofrequency signal for being exported the first numerical-control attenuator by the first amplifier is linearly amplified to first order power level；
The radiofrequency signal exported by the second voltage-controlled attenuator according to the first amplifier carries out gain to radio frequency amplifying circuit
Temperature-compensating；
Radiofrequency signal and the forward coupler output exported by analog predistortion device according to the second voltage-controlled attenuator
Feedback signal carries out linearisation correction to the second amplifier；
The radiofrequency signal of input is linearly amplified to by second level power level by the second amplifier；
The radiofrequency signal of input is linearly amplified to by third level power level by the 3rd amplifier；
The radiofrequency signal of input is linearly amplified to the power level of requirement by the 4th amplifier；
The radiofrequency signal of input is coupled into by three tunnel radiofrequency signals by forward coupler and exported respectively, first via radio frequency
Signal output is to circulator, and the second tunnel radiofrequency signal is output to analog predistortion device, the 3rd tunnel radiofrequency signal as feedback signal
Auxiliary circuit is output to carry out forward power detection；
The first via radiofrequency signal of forward coupler output is received by circulator and is divided into two-way and is exported, first via radio frequency
Signal output is to external equipment, and the second tunnel radiofrequency signal is output to auxiliary circuit to carry out backward power inspection by RF switch
Survey.
Further, input power, positive power output and reversely output of the auxiliary circuit to radio frequency amplifying circuit
The method that power is detected, comprises the following steps：
The detection of input power is carried out by the energy for the radiofrequency signal for inputting demodulator probe sampling isolator output and incited somebody to action
The power of detection changes into voltage and is input to single-chip microcomputer, and the voltage of input is calculated by single-chip microcomputer and drawn corresponding
Input power value；
The 3rd tunnel radiofrequency signal exported by positive demodulator probe to forward coupler carries out forward power detection and will
The power of detection changes into voltage and is input to single-chip microcomputer, and the voltage of input is calculated by single-chip microcomputer and drawn corresponding
Forward power value；
The energy for coupling the second tunnel radiofrequency signal that sampling circulator is exported by reverse demodulator probe carries out backward power
Detect and the power of detection is changed into voltage and be input to single-chip microcomputer, the voltage of input is calculated simultaneously by single-chip microcomputer
Draw corresponding backward power value.
The amplification efficiency of the present invention is high, and with the good linearity, can meet the performance indications of TD-LTE base station systems
It is required that, with relatively good application prospect.
【Brief description of the drawings】
A kind of theory diagram for RF Amplifier Module that Fig. 1 provides for the present invention；
A kind of schematic diagram for RF Amplifier Module that Fig. 2 provides for the present invention；
Fig. 3 is that the radiofrequency signal that is inputted to downlink of radio frequency amplifying circuit of RF Amplifier Module shown in Fig. 1 carries out work(
The schematic flow sheet of rate enhanced processing and the method exported；
Fig. 4 is input power of the auxiliary circuit to radio frequency amplifying circuit of RF Amplifier Module shown in Fig. 1, positive output work
The schematic flow sheet for the method that rate and reverse power output are detected；
Fig. 5 is that the radiofrequency signal that is inputted to up-link of low noise amplifier circuit of RF Amplifier Module shown in Fig. 1 is carried out
The schematic flow sheet of low noise enhanced processing and the method exported.
【Embodiment】
The invention will be further described with reference to the accompanying drawings and examples.
With reference to Fig. 1, a kind of RF Amplifier Module that the present invention is provided, including descending amplifying unit, up amplifying unit with
And it is connected to the RF switch 80 between descending amplifying unit and up amplifying unit.Descending amplifying unit has high efficiency, height
Linearly, the features such as accurate control performance.Descending amplifying unit includes being used for carrying out power to the radiofrequency signal that downlink is inputted
Enhanced processing and the radio frequency amplifying circuit 10 that exports and for the input power to radio frequency amplifying circuit 10, positive power output
The auxiliary circuit 50 detected with reverse power output.Up amplifying unit includes being used for believing the radio frequency that up-link is inputted
Number carry out low noise enhanced processing and export low noise amplifier circuit 90.When RF switch 80 is used to carry out descending time slot and be up
The switching of gap, so as to the radiofrequency signal of downlink is carried out respectively power amplification processing and export, the radio frequency of up-link is believed
Number low noise enhanced processing and export.In the present embodiment, descending amplifying unit, up amplifying unit are needed in outside up-downgoing
Worked under the control of synchronous control signal, to meet the effect of TD-LTE synchronizations.
Also there is descending amplifying unit power amplifier switch, power amplifier to cross the function such as work(alarm and the alarm of power amplifier excessively stream.Power amplifier switch
By controlling the grid voltage of radio frequency amplifying circuit 10, to realize the output of signal level.It is by auxiliary that power amplifier, which crosses work(alarm,
Circuit 80 detects real output, is compared with threshold value, and radio frequency amplifying circuit 10 is closed during more than threshold value, shows that work(was accused
It is alert.The alarm of power amplifier excessively stream is to detect real work electric current by auxiliary circuit 80, is compared with threshold value, closes and penetrates during more than threshold value
Frequency amplifying circuit 10, display excessively stream alarm.
With reference to Fig. 2, radio frequency amplifying circuit 10 includes isolator 11, the first voltage-controlled attenuator 12, first number being sequentially connected
Control attenuator 13, the first amplifier 14, the second voltage-controlled attenuator 15, analog predistortion device 16, amplifier section, forward coupler 20
With circulator 21.Circulator 21 is connected with RF switch 80.
Isolator 11 is surface mounting component, centre frequency 1795MHz, insertion loss 0.73dB (decibel), isolation 10dB, volume
Determine power 2.5W, the radiofrequency signal for downlink to be inputted carries out isolation and amplifier.First voltage-controlled attenuator 12 is by two pressures
Attenuation diode composition is controlled, as a part for automatic level control circuit, gain-adjusted scope is more than 15dB, for by adjusting
The power level for the radiofrequency signal that attenuation regulation is exported from isolator 11 is saved with by the peak power output of descending amplifying unit
Control is in rated output power level.First numerical-control attenuator 13 is High Linear, 5-bit RF digital step attenuators, regulation
Scope 31dB, stepping 1dB, the radiofrequency signal for being exported according to the first voltage-controlled attenuator 12 adjust the increasing of radio frequency amplifying circuit 10
Benefit.First amplifier 14 is a gain amplifier, and frequency range is 50~4000MHz, and P1dB (1dB compression point) is
20.2dBm 1900MHz, gain is 22.2dB 1900MHz, and the radiofrequency signal for the first numerical-control attenuator 13 to be exported is linear
It is amplified to first order power level.Second voltage-controlled attenuator 15 is a voltage-controlled attenuation diode, is used as Temperature compensation for gain portion
The part divided, gain-adjusted scope is more than 10dB, and the radiofrequency signal for being exported according to the first amplifier 14 is amplified to radio frequency
Circuit 10 carries out Temperature compensation for gain.The frequency range of analog predistortion device is 1500-2200MHz, and correct amount is more than 15dB, uses
In exported according to the second voltage-controlled attenuator 15 radiofrequency signal and forward coupler 20 output feedback signal to amplifier section
Linearisation correction is carried out, so that amplifier section carries out arized power amplification, makes power that there is the good linearity.Amplifier section
For the radiofrequency signal to input power amplification is carried out by power requirement.Forward coupler 20 is using microstrip coupled, for will be defeated
The radiofrequency signal entered is coupled into three tunnel radiofrequency signals and exported respectively, and first via radiofrequency signal is used to be output to circulator 21, the
Two tunnel radiofrequency signals are used to be output to analog predistortion device 16 as feedback signal, and the 3rd tunnel radiofrequency signal is used to be output to auxiliary
Circuit 50 is to carry out forward power detection.The high mutually modulating materials of the use of circulator 21, insertion loss≤0.25dB, isolation >=
25dB, standing-wave ratio≤1.15, rated power is 150W, for receiving the first via radiofrequency signal of the output of forward coupler 20 and dividing
Into two-way output, first via radiofrequency signal is used to be output to external equipment, and the second tunnel radiofrequency signal is used for by RF switch 80
Auxiliary circuit 50 is output to carry out backward power detection.
Forward coupler 20 includes first via output end, the second tunnel output end and the 3rd tunnel output end.First via output end
It is connected with circulator 21, for exporting first via radiofrequency signal.Second tunnel output end is connected with analog predistortion device 16, for defeated
Go out the second tunnel radiofrequency signal.3rd tunnel output end is connected with auxiliary circuit 50, for exporting the 3rd tunnel radiofrequency signal to carry out just
To power detection.
Circulator 21 includes the first output end and the second output end.First output end is used to export first via radiofrequency signal
To external equipment.Second output end is connected with RF switch 80, for exporting when RF switch 80 is switched to descending time slot
Two tunnel radiofrequency signals are to auxiliary circuit 50 to carry out backward power detection.
Amplifier section includes the second amplifier 17, the 3rd amplifier 18 and the 4th amplifier 19 being sequentially connected.Second puts
Big device 17 is gain amplifier, and frequency range is 400~2700MHz, and P1dB is 28.5dBm@1900MHz, and gain is 20.0dB@
1900MHz, is connected with analog predistortion device 16, for the radiofrequency signal of input to be linearly amplified into second level power level.The
Three amplifiers 18 are Doherty (Doherty) the structure amplifier being made up of two power tubes, and the effect of amplification is greatly improved
Rate, single tube peak power is 10W@1880MHz, and gain is 18dB@1880MHz, is powered using+28V, for by the radio frequency of input
Linearly is amplified to third level power level.4th amplifier 19 is that the Doherty structures being made up of two power tubes are amplified
Device, can equally increase substantially the efficiency of amplification, and single tube peak power is 125W@1880MHz, and gain is 20.2dB@
1880MHz, is powered using+28V, is connected with forward coupler 20, for the radiofrequency signal of input to be linearly amplified into requirement
Level.The radiofrequency signal and forward coupler 20 that analog predistortion device 16 is used to be exported according to the second voltage-controlled attenuator 15 are exported
Feedback signal to the second amplifier 17 carry out linearisation correction so that by the second amplifier 17 amplify radiofrequency signal have
The good linearity, improves the linear function of radiofrequency signal.
Auxiliary circuit 50 includes single-chip microcomputer 51, input demodulator probe 52, positive demodulator probe 53 and reverse demodulator probe 54.
Input demodulator probe 52 is to use peak detection pipe, and detection range is 40dB, and accuracy of detection is less than ± 2dB, one end be connected to every
From between the voltage-controlled attenuator 12 of device 11 and first, the other end is connected to single-chip microcomputer 51, the radio frequency for the output of isolator 11 of sampling
The energy of signal carries out the detection of input power and the power of detection is changed into voltage being input to single-chip microcomputer 51.Positive detection
Part 53 is to use average detection tube, and detection range is greater than 40dB, and accuracy of detection is less than ± 1dB, one end and forward coupler
20 connections, the other end is connected to single-chip microcomputer 51, and the 3rd tunnel radiofrequency signal for being exported to forward coupler 20 carries out positive work(
Rate, which detects and the power of detection is changed into voltage, is input to single-chip microcomputer 51.Reverse demodulator probe 54 is to use peak detection
Pipe, detection range is 40dB, and accuracy of detection is less than ± 2dB, and one end is connected with RF switch 80, and the other end is connected to single-chip microcomputer
51, carry out backward power detection and by the work(of detection for coupling the energy for the second tunnel radiofrequency signal that sampling circulator 21 is exported
Rate changes into voltage and is input to single-chip microcomputer 51.Single-chip microcomputer 51 is to use microprocessor ATMEGA16L, is a use CMOS works
8 low-power scms based on the enhanced risc architectures of AVR of skill production, for the voltage inputted to input demodulator probe 52
The voltage that voltage, the reverse demodulator probe 54 that amount, positive demodulator probe 53 are inputted are inputted is respectively calculated and draws phase
Input power value, forward power value and the backward power value answered.Single-chip microcomputer 51 is single provided with the communication interface with external device communication
The performance number that piece machine 51 is calculated can be output to external equipment by communication interface.
Auxiliary circuit 50 also include be connected respectively with single-chip microcomputer auto level control part, Temperature compensation for gain part,
Grid voltage temperature-compensating part, temperature detection part and current detecting part.Auto level control part includes the first voltage-controlled decay
Device 12, the first voltage-controlled attenuator 12 is adjusted the increasing of radio frequency amplifying circuit 10 by adjusting attenuation by the control of single-chip microcomputer 51
Benefit.Temperature compensation for gain part include the second voltage-controlled attenuator 15, the second voltage-controlled attenuator 15 by single-chip microcomputer 51 control, to penetrating
Frequency amplifying circuit 10 carries out Temperature compensation for gain.Grid voltage temperature-compensating part is used to amplify electricity to radio frequency by the control of single-chip microcomputer 51
The grid voltage on road 10 carries out temperature-compensating.Temperature detection part is used for the temperature to radio frequency amplifying circuit 10 by the control of single-chip microcomputer 51
Detected.Current detecting part is used to detect the electric current of radio frequency amplifying circuit 10 by the control of single-chip microcomputer 51.
It is to the realization principle that radio frequency amplifying circuit 10 carries out Temperature compensation for gain：By software design patterns, corresponding not equality of temperature
Section is spent, different voltage compensation values are set.When radio frequency amplifying circuit 10 is in some temperature, examined in real time by temperature detection part
The temperature of radio frequency amplifying circuit 10 is surveyed, single-chip microcomputer 51 is according to corresponding temperature section output corresponding voltage offset to the second voltage-controlled decay
Device 15, the second voltage-controlled attenuator 15 adjusts attenuation according to voltage compensation value, so as to realize the gain to radio frequency amplifying circuit 10
Temperature-compensating, so that the constant gain of the radio frequency amplifying circuit 10 under ensureing different temperatures.
Low-noise amplifier 91 that low noise amplifier circuit 90 includes being sequentially connected, gain amplifier the 92, the 3rd is voltage-controlled declines
Subtract device 93, the numerical-control attenuator 95 of wave filter 94 and second.Low-noise amplifier 91 is connected with RF switch 80.Low-noise amplifier
91 are used to carry out low noise amplification to the radiofrequency signal that up-link is inputted.Gain amplifier 92 is used for defeated to low-noise amplifier 91
The radiofrequency signal gone out carries out gain amplification.3rd voltage-controlled attenuator 93 is used to adjust the radiofrequency signal exported from gain amplifier 92
Power level with by the peak power output of up amplifying unit control in rated output power level.Wave filter 94 be used for pair
The radiofrequency signal of 3rd voltage-controlled attenuator 93 output is filtered.Second numerical-control attenuator 95 is used for what is exported according to wave filter 94
The gain of radiofrequency signal regulation low noise amplifier circuit 90 simultaneously exports radiofrequency signal.
The amplification efficiency of the present invention is high, and with the good linearity, can meet the performance indications of TD-LTE base station systems
It is required that, with relatively good application prospect.
Also with reference to Fig. 1, present invention also offers a kind of amplification method of RF Amplifier Module.RF Amplifier Module includes
Descending amplifying unit, up amplifying unit and the RF switch being connected between descending amplifying unit and up amplifying unit
80, descending amplifying unit includes radio frequency amplifying circuit 10 and auxiliary circuit 50, and up amplifying unit includes low noise amplifier circuit
90.This method comprises the following steps：
In the downlink, the radiofrequency signal inputted by radio frequency amplifying circuit 10 to downlink is carried out at power amplification
Manage and export.Pass through input power, positive power output and reverse power output of the auxiliary circuit 50 to radio frequency amplifying circuit 10
Detected.
In the uplink, the radiofrequency signal inputted by low noise amplifier circuit 90 to up-link carries out low noise amplification
Handle and export.
With reference to Fig. 3, the radiofrequency signal that radio frequency amplifying circuit 10 is inputted to downlink carries out power amplification processing and exported
Method, comprise the following steps：
S1, the radiofrequency signal for being inputted downlink by isolator 11 carry out isolation and amplifier.
S2, the power level of the radiofrequency signal exported from isolator 11 adjusted with will be descending by the first voltage-controlled attenuator 12
The peak power output of amplifying unit is controlled in rated output power level.
S3, the radiofrequency signal exported by the first numerical-control attenuator 13 according to the first voltage-controlled attenuator 12 adjust radio frequency and amplified
The gain of circuit 10.
S4, the radiofrequency signal that the first numerical-control attenuator 13 is exported linearly is amplified to by first order work(by the first amplifier 14
Rate level.
S5, the radiofrequency signal exported by the second voltage-controlled attenuator 15 according to the first amplifier 14 are to radio frequency amplifying circuit 10
Carry out Temperature compensation for gain.
S6, the radiofrequency signal exported by analog predistortion device 16 according to the second voltage-controlled attenuator 15 and forward coupler
The feedback signal of 20 outputs carries out linearisation correction to the second amplifier 17.Specifically, the second voltage-controlled attenuator 15 output penetrate
The feedback signal that frequency signal and forward coupler 20 are exported enters analog predistortion device 16, by computing, provides and the second amplification
The distortion of device 17 nonlinear properties output in opposite direction, then it is output to the linear of the second amplifier 17 progress first order power level
Amplification, so that realizing improves the linear function of radiofrequency signal.
S7, the radiofrequency signal of input is linearly amplified to by second level power level by the second amplifier 17.
S8, the radiofrequency signal of input is linearly amplified to by third level power level by the 3rd amplifier 18.
S9, the power level that the radiofrequency signal of input is linearly amplified to by the 4th amplifier 19 requirement.
S10, the radiofrequency signal of input is coupled into by three tunnel radiofrequency signals by forward coupler 20 and exported respectively, first
Road radiofrequency signal is output to circulator 21, and the second tunnel radiofrequency signal is output to analog predistortion device 16, the 3rd as feedback signal
Road radiofrequency signal is output to auxiliary circuit 50 to carry out forward power detection.
S11, the first via radiofrequency signal exported by the reception forward coupler 20 of circulator 21 are simultaneously divided into two-way output, the
Radiofrequency signal is output to external equipment all the way, and the second tunnel radiofrequency signal is output to auxiliary circuit 50 to carry out by RF switch 80
Backward power is detected.
With reference to Fig. 4, input power, positive power output and reverse output work of the auxiliary circuit 50 to radio frequency amplifying circuit 10
The method that rate is detected, comprises the following steps：
S51, by inputting the sample energy of radiofrequency signal that isolator 11 exports of demodulator probe 52 carry out input power
Detect and the power of detection is changed into voltage and be input to single-chip microcomputer 51, counted by the voltage of 51 pairs of inputs of single-chip microcomputer
Calculate and draw corresponding input power value.
S52, the 3rd tunnel radiofrequency signal exported by positive demodulator probe 53 to forward coupler 20 carry out forward power
Detect and the power of detection is changed into voltage and be input to single-chip microcomputer 51, counted by the voltage of 51 pairs of inputs of single-chip microcomputer
Calculate and draw corresponding forward power value.
S53, by reverse demodulator probe 54 when RF switch 80 is switched to descending time slot, coupling sampling circulator 21 it is defeated
The energy of the second tunnel radiofrequency signal gone out carries out backward power detection and the power of detection is changed into voltage being input to monolithic
Machine 51, is calculated by the voltage of 51 pairs of inputs of single-chip microcomputer and draws corresponding backward power value.
With reference to Fig. 5, the radiofrequency signal that low noise amplifier circuit 90 is inputted to up-link carries out low noise enhanced processing and defeated
The method gone out, comprises the following steps：
S91, the radiofrequency signal inputted by low-noise amplifier 91 to up-link carry out low noise amplification.
S92, the radiofrequency signal exported by gain amplifier 92 to low-noise amplifier 91 carry out gain amplification.
S93, by the 3rd voltage-controlled attenuator 93 adjust from gain amplifier 92 export radiofrequency signal power level with
The peak power output of up amplifying unit is controlled in rated output power level.
S94, the radiofrequency signal exported by 94 pair of the 3rd voltage-controlled attenuator 93 of wave filter are filtered.
S95, the radiofrequency signal exported by the second numerical-control attenuator 95 according to wave filter 94 adjust low noise amplifier circuit
90 gain simultaneously exports radiofrequency signal.
Above example only expresses the preferred embodiment of the present invention, and it describes more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, it is such as special to the difference in each embodiment
Levy and be combined, these belong to protection scope of the present invention.
Claims (10)
1. a kind of RF Amplifier Module, it is characterised in that：Including descending amplifying unit, up amplifying unit and it is connected to descending
RF switch between amplifying unit and up amplifying unit, the descending amplifying unit includes being used for input downlink
Radiofrequency signal carry out power amplification processing and export radio frequency amplifying circuit and for the input power to radio frequency amplifying circuit,
The auxiliary circuit that positive power output and reverse power output are detected, the up amplifying unit includes being used for uplink
The radiofrequency signal of road input carries out low noise enhanced processing and the low noise amplifier circuit exported.
2. RF Amplifier Module according to claim 1, it is characterised in that：The radio frequency amplifying circuit includes being sequentially connected
Isolator, the first voltage-controlled attenuator, the first numerical-control attenuator, the first amplifier, the second voltage-controlled attenuator, analog predistortion
Device, amplifier section, forward coupler and circulator, the circulator are connected with the RF switch.
3. RF Amplifier Module according to claim 2, it is characterised in that：The isolator is used to input downlink
Radiofrequency signal carry out isolation and amplifier；First voltage-controlled attenuator is used to adjust from the radiofrequency signal of isolator output
Power level with by the peak power output of the descending amplifying unit control in rated output power level；First numerical control
Attenuator is used for the gain of the radiofrequency signal regulation radio frequency amplifying circuit exported according to first voltage-controlled attenuator；It is described
First amplifier is used to the radiofrequency signal that first numerical-control attenuator is exported linearly being amplified to first order power level；It is described
The radiofrequency signal that second voltage-controlled attenuator is used to be exported according to first amplifier carries out gain to the radio frequency amplifying circuit
Temperature-compensating；The analog predistortion device is used for the radiofrequency signal and the forward direction exported according to second voltage-controlled attenuator
The feedback signal of coupler output carries out linearisation correction to the amplifier section；The amplifier section is used for the radio frequency to input
Signal carries out power amplification by power requirement；The forward coupler is used to the radiofrequency signal of input being coupled into three road radio frequencies letters
Number and export respectively, the first via radiofrequency signal be used for be output to the circulator, second tunnel radiofrequency signal is as anti-
Feedback signal is used to be output to the analog predistortion device, and the 3rd tunnel radiofrequency signal is used to be output to the auxiliary circuit to enter
Row forward power is detected；The circulator is used to receive the first via radiofrequency signal of the forward coupler output and is divided into two-way
Output, the first via radiofrequency signal is used to be output to external equipment, and second tunnel radiofrequency signal passes through the RF switch
For being output to the auxiliary circuit to carry out backward power detection.
4. RF Amplifier Module according to claim 3, it is characterised in that：The amplifier section includes the be sequentially connected
Two amplifiers, the 3rd amplifier and the 4th amplifier, second amplifier are connected with the analog predistortion device, and the described 4th
Amplifier is connected with the forward coupler；The analog predistortion device is used for according to penetrating that second voltage-controlled attenuator is exported
Frequency signal and the feedback signal of forward coupler output carry out linearisation correction to second amplifier；Described second
Amplifier is used to the radiofrequency signal of input being linearly amplified to second level power level；3rd amplifier is used for input
Radiofrequency signal is linearly amplified to third level power level；4th amplifier is used to the radiofrequency signal of input being linearly amplified to
It is required that power level.
5. RF Amplifier Module according to claim 3, it is characterised in that：The auxiliary circuit includes single-chip microcomputer, input
Demodulator probe, positive demodulator probe and reverse demodulator probe；Described input demodulator probe one end is connected to the isolator and institute
State between the first voltage-controlled attenuator, the other end is connected to the single-chip microcomputer, the radiofrequency signal for the isolator output of sampling
Energy carry out the detection of input power and the power of detection is changed into voltage be input to single-chip microcomputer；The positive detection section
Point one end is connected with the forward coupler, and the other end is connected to the single-chip microcomputer, for forward coupler is exported the 3rd
Road radiofrequency signal carries out forward power detection and the power of detection is changed into voltage being input to single-chip microcomputer；The reverse detection
Part one end is connected with the RF switch, and the other end is connected to the single-chip microcomputer, for coupling the sampling circulator output
The energy of the second tunnel radiofrequency signal carry out backward power detection and the power of detection is changed into voltage be input to single-chip microcomputer；
The single-chip microcomputer is used for voltage, the institute that voltage, the positive demodulator probe to the input demodulator probe input are inputted
The voltage for stating the input of reverse demodulator probe is respectively calculated and draws corresponding input power value, forward power value and reversely
Performance number.
6. RF Amplifier Module according to claim 5, it is characterised in that：The auxiliary circuit also include respectively with it is described
Single-chip microcomputer connection auto level control part, Temperature compensation for gain part, grid voltage temperature-compensating part, temperature detection part and
Current detecting part；The auto level control part includes first voltage-controlled attenuator；The Temperature compensation for gain part
Including second voltage-controlled attenuator；The grid voltage temperature-compensating part is used to carry out temperature to the grid voltage of the radio frequency amplifying circuit
Degree compensation；The temperature detection part is used to detect the temperature of the radio frequency amplifying circuit；The current detecting part
Detected for the electric current to the radio frequency amplifying circuit.
7. RF Amplifier Module according to claim 1, it is characterised in that：The low noise amplifier circuit includes connecting successively
Low-noise amplifier, gain amplifier, the 3rd voltage-controlled attenuator, wave filter and the second numerical-control attenuator connect, the low noise
Amplifier is connected with the RF switch；The low-noise amplifier is used to carry out low noise to the radiofrequency signal that up-link is inputted
Amplification；The gain amplifier is used to carry out gain amplification to the radiofrequency signal that the low-noise amplifier is exported；Described 3rd
Voltage-controlled attenuator is used to adjust the power level of the radiofrequency signal exported from the gain amplifier so that the up amplification is single
The peak power output of member is controlled in rated output power level；The wave filter is used to export the 3rd voltage-controlled attenuator
Radiofrequency signal be filtered；Second numerical-control attenuator is used for according to the radiofrequency signal regulation that the wave filter is exported
The gain of low noise amplifier circuit simultaneously exports radiofrequency signal.
8. a kind of amplification method of RF Amplifier Module, it is characterised in that：The RF Amplifier Module include descending amplifying unit, on
Row amplifying unit and the RF switch being connected between descending amplifying unit and up amplifying unit, the descending amplifying unit
Including radio frequency amplifying circuit and auxiliary circuit, the up amplifying unit includes low noise amplifier circuit, and the amplification method includes
Following steps：
In the downlink, the radiofrequency signal inputted by radio frequency amplifying circuit to downlink carries out power amplification processing and defeated
Go out；The input power, positive power output and reverse power output of radio frequency amplifying circuit are detected by auxiliary circuit；
In the uplink, the radiofrequency signal inputted by low noise amplifier circuit to up-link carries out low noise enhanced processing simultaneously
Output.
9. the amplification method of RF Amplifier Module according to claim 8, it is characterised in that：The radio frequency amplifying circuit pair
The method that the radiofrequency signal of downlink input carries out power amplification processing, comprises the following steps：
The radiofrequency signal for being inputted downlink by isolator carries out isolation and amplifier；
The power level of the radiofrequency signal exported from isolator is adjusted with by descending amplifying unit by the first voltage-controlled attenuator
Peak power output is controlled in rated output power level；
The radiofrequency signal exported by the first numerical-control attenuator according to the first voltage-controlled attenuator adjusts the gain of radio frequency amplifying circuit；
The radiofrequency signal for being exported the first numerical-control attenuator by the first amplifier is linearly amplified to first order power level；
The radiofrequency signal exported by the second voltage-controlled attenuator according to the first amplifier carries out gain temperature to radio frequency amplifying circuit
Compensation；
The feedback of radiofrequency signal and the forward coupler output exported by analog predistortion device according to the second voltage-controlled attenuator
Signal carries out linearisation correction to the second amplifier；
The radiofrequency signal of input is linearly amplified to by second level power level by the second amplifier；
The radiofrequency signal of input is linearly amplified to by third level power level by the 3rd amplifier；
The radiofrequency signal of input is linearly amplified to the power level of requirement by the 4th amplifier；
The radiofrequency signal of input is coupled into by three tunnel radiofrequency signals by forward coupler and exported respectively, first via radiofrequency signal
Circulator is output to, the second tunnel radiofrequency signal is output to analog predistortion device, the 3rd tunnel radiofrequency signal output as feedback signal
To auxiliary circuit to carry out forward power detection；
The first via radiofrequency signal of forward coupler output is received by circulator and is divided into two-way and is exported, first via radiofrequency signal
External equipment is output to, the second tunnel radiofrequency signal is output to auxiliary circuit to carry out backward power detection by RF switch.
10. the amplification method of RF Amplifier Module according to claim 9, it is characterised in that：The auxiliary circuit is to penetrating
The method that the input power of frequency amplifying circuit, positive power output and reverse power output are detected, comprises the following steps：
The detection of input power is carried out by the energy for the radiofrequency signal for inputting demodulator probe sampling isolator output and will be detected
Power change into voltage and be input to single-chip microcomputer, the voltage of input is calculated by single-chip microcomputer and drawn corresponding defeated
Enter performance number；
The 3rd tunnel radiofrequency signal exported by positive demodulator probe to forward coupler carries out forward power detection and will detection
Power change into voltage and be input to single-chip microcomputer, the voltage of input is calculated by single-chip microcomputer and draw it is corresponding just
To performance number；
The energy for coupling the second tunnel radiofrequency signal that sampling circulator is exported by reverse demodulator probe carries out backward power detection
And the power of detection is changed into voltage be input to single-chip microcomputer, the voltage of input is calculated and drawn by single-chip microcomputer
Corresponding backward power value.
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| CN201710252722.XA CN107094029A (en) | 2017-04-18 | 2017-04-18 | A kind of RF Amplifier Module and its amplification method |
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| CN201710252722.XA CN107094029A (en) | 2017-04-18 | 2017-04-18 | A kind of RF Amplifier Module and its amplification method |
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| CN107819476A (en) * | 2017-11-18 | 2018-03-20 | 国家电网公司 | The lightning protection antenna and system of a kind of extremely strong and pole weak signal for GPRS acquisition terminals |
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Application publication date: 20170825 |