CN108540100A - A kind of adjustment method of RF power amplification - Google Patents
A kind of adjustment method of RF power amplification Download PDFInfo
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- CN108540100A CN108540100A CN201810284253.4A CN201810284253A CN108540100A CN 108540100 A CN108540100 A CN 108540100A CN 201810284253 A CN201810284253 A CN 201810284253A CN 108540100 A CN108540100 A CN 108540100A
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Classifications
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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
- H03F1/56—Modifications of input or output impedances, not otherwise provided for
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- 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
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- 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
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- 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
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
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Abstract
A kind of adjustment method of RF power amplification, includes the following steps through passive debugging, obtains the good targeted loads of the linearity；It is constant to fix the targeted loads, carries out active debugging；In active debugging, the bias values of current value minimum in linearity allowable range are chosen；The bias values of the selection are fixed, supply voltage is reduced, choose supply voltage minimum in linearity allowable range；The running parameter of the bias values chosen and minimum supply voltage as RF power amplification is exported, all good running parameter of passive and active performance is obtained.Due to by first carrying out passive debugging, obtain the good target impedance of passive performance, then the target impedance is fixed, carry out active debugging, effective bias values that current value minimum is first selected when active debugging, further fix this bias value, continuously decrease supply voltage, the supply voltage for obtaining the minimum in the range of linearity allows, finally obtains the active performance of power amplifier and all good running parameter of passive performance.
Description
Technical field
This application involves RF power amplification debugging techniques, and in particular to a kind of radio-frequency power debugging side of wireless telecommunications system
Method.
Background technology
RF power amplification, that is, radio-frequency power amplifier, RF power amplification are the important components of various wireless transmitters.It is sending out
It penetrates in the front stage circuits of machine, RF signal power very little caused by modulation oscillator circuit, needs to obtain enough by amplification
After radio-frequency power, it can just be fed on antenna and radiate.In order to obtain sufficiently large radio frequency power output, it is necessary to use and penetrate
Frequency power amplifier.Judge that the major parameter of radio-frequency power amplifier performance has output power, power consumption and the linearity, center line
Property degree feedback distortion degree.
Currently, the common practice of debugging radio frequency power amplifier is first to carry out passive debugging, by the negative of power amplifier
It carries terminal impedance debugging and draws the linearity and all preferable position of power consumption moved on (load pull) to load, then reuse power
Amplifier quiescent point recommended by the manufacturer (bias), then carry out active debugging.
It may be the error of test system, also or be the factors such as PCB material, layout, passive relatively good position is big
Probability result when testing active performance is unsatisfactory, usually to debug load terminal impedance again, and finally debugging comes out result
It is again devious with ideal passive site.Engineer is typically by exhaustive method, constantly adjustment load terminal impedance
So that radio-frequency power amplifier obtains satisfactory performance, when adjustment loads terminal impedance, engineer is needed constantly to weld
Material is matched, engineer's a large amount of time is spent.
Invention content
The application provides a kind of adjustment method of power amplifier, to simplify debugging efforts.
According in a first aspect, provide a kind of adjustment method of RF power amplification in a kind of embodiment, include the following steps：S1、
The load terminal impedance of RF power amplification is transformed to target impedance by passive debugging；S2, penetrating after load terminal impedance converts is obtained
All effective bias values of frequency power amplifier, for each effective bias value：By the electric signal of the bias values and default confession
Piezoelectric voltage is applied on the RF power amplification after load terminal impedance transformation, is adjusted the input power of RF power amplification and is measured corresponding defeated
Go out power, stop adjustment when output power falls into preset power interval, obtains the linearity of RF power amplification and defeated at this time
Go out electric current, the linearity and output current as the RF power amplification corresponding to the bias values；S3, from each effective bias values
One bisa value of middle selection, the bisa values meet that its corresponding linearity is fallen into the first predetermined linear degree section and its is corresponding
Output current is minimum；S4, the bisa values for selected taking-up apply the initial supply voltage of the electric signal of the bisa values and one
On RF power amplification after to load terminal impedance transformation, power supply electricity is reduced with certain stepping since the initial supply voltage
Pressure, for the supply voltage after reducing every time：Under the supply voltage, adjusts the input power of RF power amplification and measure corresponding
Output power stops adjustment when output power falls into preset power interval, obtains and judge the line of RF power amplification at this time
Property degree whether fall into the second predetermined linear degree section, if it is continue to reduce supply voltage at this time, conversely, then recording this
When supply voltage reduce before supply voltage；S5, using the selected bisa values selected, the supply voltage recorded as radio frequency
The running parameter of power amplifier.
Preferably, it may further include before step S2 and selected in the bias values of RF power amplification after load terminal impedance converts
Go out effective bias values in pre-set interval.
Preferably, it in step S2 and S4, still further comprises：If output power is more than the work(in the power interval of setting
Rate upper limit value reduces input power；If output power is less than the lower limit of the power value in the power interval of setting, input work is improved
Rate.
Preferably, in step s 4, supply voltage is reduced with 0.1V steppings.
Preferably, in step s 5, further include the corresponding power consumption of record running parameter, the linearity and output power.
Preferably, the load terminal impedance of RF power amplification is transformed to by target impedance by passive debugging in the step S1,
Including：By giving the RF power amplification electrical connection matching material so that the actual loading terminal impedance of RF power amplification changes to target
Impedance.
Preferably, the target impedance is the impedance of a preset fixed value, alternatively, the target impedance is in passive tune
The linearity of RF power amplification falls into the impedance in third predetermined linear degree section when in examination as load terminal impedance.
Preferably, the target impedance is that the linearity as RF power amplification when loading terminal impedance in passive debugging is fallen into
Impedance in third predetermined linear degree section, and the target impedance is radio frequency work(when being used as load terminal impedance in passive debugging
The power consumption put falls into the impedance in preset power consumption section.
Preferably, the lower limiting value in the second predetermined linear degree section is greater than or equal under the first predetermined linear degree section
Limit value, the upper limit value in the second predetermined linear degree section are less than or equal to the upper limit value in the first predetermined linear degree section.
Preferably, debugging routine is executed by computer, it is minimum selects output current value in the first predetermined linear degree section
Bias values, by computer under conditions of the bias values and output power selected is in preset power interval, control
Programmable power supply stepping processed reduces the supply voltage of RF power amplification, and the linearity that RF power amplification is selected by computer is default second
Minimum supply voltage in linearity section.
The adjustment method of power amplifier according to above-described embodiment, due to by first carrying out passive debugging, obtaining passive
The good target impedance of performance, then fixes the target impedance, carries out active debugging, and it is minimum that when active debugging first selects current value
Effective bias values, further fix this bias value, continuously decrease supply voltage, obtain in the range of the linearity allows most
Small supply voltage obtains the best running parameter of the active performance of power amplifier, while having good passive performance.The present invention is not necessarily to
Manually welding matched load terminal impedance repeatedly reaches RF power amplification debugging purpose, saves the plenty of time, shortens project development week
Phase reduces human cost.Further, debugging routine is executed by computer, greatly shortens debug time, very big shortening project is opened
Send out the period.
Description of the drawings
Fig. 1 is the application first embodiment flow chart；
Fig. 2 is the application hardware system block diagram；
Fig. 3 is the application second embodiment flow chart；
Fig. 4 is the application 3rd embodiment flow chart；
Fig. 5 is the functional block diagram for applying running parameter to RF power amplification.
Specific implementation mode
Below by specific implementation mode combination attached drawing, invention is further described in detail.Wherein different embodiments
Middle similar component uses associated similar element numbers.In the following embodiments, many datail descriptions be in order to
The application is better understood.However, those skilled in the art can be without lifting an eyebrow recognize, which part feature
It is dispensed, or can be substituted by other elements, material, method in varied situations.In some cases, this Shen
Please it is relevant some operation there is no in the description show or describe, this is the core in order to avoid the application by mistake
More descriptions are flooded, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary, they
It can completely understand relevant operation according to the general technology knowledge of description and this field in specification.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
Embodiment one：
Referring to FIG. 1, core of the invention design is：
Step 101, first choice obtain the good targeted loads of the linearity by passive debugging；
Step 102, to fix the targeted loads constant, carries out active debugging；In active debugging, choosing the linearity allows model
Enclose the bias values of interior current value minimum；
Step 103 and then the bias values for fixing the selection, stepping reduce supply voltage, choose in linearity allowable range
Minimum supply voltage；
Running parameter of the supply voltage of step 104, the bias values for finally exporting selection and minimum as RF power amplification, obtains
To all good running parameter of passive and active performance.
Above-mentioned steps 102,103 are required to meet output power and fall into preset power interval.
Embodiment two：
Referring to FIG. 3, being described in detail to technical scheme of the present invention in conjunction with the embodiment, which includes following step
Suddenly：
201, passive debugging is carried out to load terminal impedance, by being electrically connected matching material to RF power amplification, such as resistance and electricity
Hold so that the actual loading terminal impedance of RF power amplification changes to target impedance, obtains target impedance.The target impedance can be one
The impedance of preset fixed value, in normal this certain value of 50 Ω in this field, alternatively, target impedance is to be used as to bear in passive debugging
The linearity of RF power amplification falls into the impedance in third predetermined linear degree section when carrying terminal impedance, preferably, target impedance is also
The power consumption of RF power amplification falls into the impedance in preset power consumption section when in passive debugging as load terminal impedance.
Passive adjustment method uses existing passive debugging technique, and smith circle diagrams can be used to carry out passive debugging.
In passive debugging process, shifting (load pull) platform can be drawn to observe the linearity by loading.
202, target impedance is matched on RF power amplification；
203, in the bias values that technical staff can provide from producer, preferably go out significantly more efficient bias values, this measure can be with
The operation efficiency for improving computer reduces unnecessary data and participates in screening operation；Bias values are the quiescent operations of RF power amplification
Point, different quiescent points influence whether compression ratio, saturation power, power consumption and the linearity.Bias values correspond to electric signal reality
Border is voltage value, and different bias values can make RF power amplification be in different working condition (such as diodes, in voltage more than 0.6V
When, diode can be connected, and less than 0.6V when, diode is off)；
204, for each effective bias value, by the electric signal of the bias values, input power and default power supply electricity
Pressure is applied on the RF power amplification for matching target impedance, obtains output power (with reference to figure 5, wherein VCC1=VCC2=power supplies
Voltage, power input A, power take-off B, RF power amplification 4)；
205, judge whether output power exceeds preset power interval, if output power falls into preset power area
Between, then enter step 206；If output power does not fall within preset power interval, 207 are entered step；
206, the linearity and current value for measuring the lower RF power amplification of this bias effects, subsequently into step 210；
If 207, output power is more than the upper limit of the power value in the power interval of setting, 208 reduction input works are entered step
Rate returns again to step 204；If output power is less than the lower limit of the power value in the power interval of setting, 209 raisings are entered step
Input power returns again to step 204.
210, next effective bias values process is measured, step 204,205,206 is repeated, until all bias
It is involved in test, enters step 211；
211, to each bias, after applying input power and default supply voltage to RF power amplification, RF power amplification is all
A corresponding linearity and output current value are will produce, selects that the linearity is fallen into the first predetermined linear degree section and it is corresponded to
Output current minimum bias；
212, for the bisa values of selected taking-up, the initial supply voltage of the electric signal of the bisa values and one is applied to negative
It carries on the RF power amplification after terminal impedance transformation, supply voltage is reduced with certain stepping since the initial supply voltage,
For each stepped voltage and the bias values selected, input power is applied will produce an output power to RF power amplification；
The purpose for reducing supply voltage is the optimal power consumption of selection, and when the supply voltage of power amplifier reduces, linearity index can decline, but same
The efficiency of Shi Gongfang can be promoted.
213, judge whether output power exceeds preset power interval, if output power falls into preset power area
Between, then enter step 217；If output power does not fall within preset power interval, 214 are entered step；
If 214, output power is more than the upper limit of the power value in the power interval of setting, 216 reduction input works are entered step
Rate returns again to step 212；If output power is less than the lower limit of the power value in the power interval of setting, 215 raisings are entered step
Input power returns again to step 212.
217, for the bisa values of selected taking-up and each supply voltage, RF power amplification will produce a linearity, sentence
Whether the linearity of disconnected RF power amplification falls into the second predetermined linear degree section, if it is return to step 212, and stepping reduces
0.1V supply voltages, conversely, entering step the supply voltage before the supply voltage of 218 records at this time reduces；Step 217 purpose is
In the range of the linearity allows, best power consumption is selected, obtains best integrated active performance.
219, using the bisa values selected, the supply voltage recorded as the running parameter of RF power amplification.
As the more preferable scheme of the embodiment, after step 218, the corresponding power consumption of running parameter, linear can also be recorded
Degree and output power, can intuitively see the active performance of RF power amplification.
As the more preferable scheme of the embodiment, the lower limiting value in above-mentioned second predetermined linear degree section is greater than or equal to first
The upper limit value of the lower limiting value in predetermined linear degree section, above-mentioned second predetermined linear degree section is less than or equal to the first predetermined linear degree
The upper limit value in section, i.e. the second predetermined linear degree section are the intervals of convergence in the first predetermined linear degree section, to obtain more preferably
Integrated active performance.
Embodiment three：
Referring to FIG. 4, the embodiment includes the following steps：
301, passive debugging is carried out to load terminal impedance, obtains target impedance；
302, target impedance is matched on RF power amplification；
303, for each effective bias value, by the electric signal of the bias values, input power and default power supply electricity
Pressure is applied on the RF power amplification for matching target impedance, obtains output power；
If 304, output power falls into preset power interval, 305 are entered step；
305, the linearity and current value of the lower RF power amplification of this bias effects are measured；
306, next effective bias values process is measured, step 303,304,305 is repeated, until all bias
It is involved in test, enters step 307；
307, to each bias, after applying input power and default supply voltage to RF power amplification, RF power amplification is all
A corresponding linearity and output current value are will produce, selects that the linearity is fallen into the first predetermined linear degree section and it is corresponded to
Output current minimum bias；
308, for the bisa values of selected taking-up, the initial supply voltage of the electric signal of the bisa values and one is applied to negative
It carries on the RF power amplification after terminal impedance transformation, supply voltage is reduced with certain stepping since the initial supply voltage,
For each stepped voltage and the bias values selected, input power is applied will produce an output power to RF power amplification；
309, output power falls into preset power interval, then enters step 310；
310, for the bisa values of selected taking-up and each supply voltage, RF power amplification will produce a linearity, sentence
Whether the linearity of disconnected RF power amplification falls into the second predetermined linear degree section, if it is return to step 308, and stepping reduces
0.1V supply voltages, conversely, entering step the supply voltage before the supply voltage of 311 records at this time reduces；
312, using the bisa values selected, the supply voltage recorded as the running parameter of RF power amplification.
Referring to FIG. 2, the hardware system of the present invention is introduced.
The hardware for being related to power amplifier debugging includes load pull platforms 5, computer 1, comprehensive tester 2, programmable power supply 3
And RF power amplification 4；
In power apparatus, LOAD PULL platforms are loaded by changing output end, using Smith chart, measure big letter
Number parameter：Such as compression ratio, saturation power, efficiency and the linearity.
In the present invention, LOAD PULL platforms 5 are used to, when carrying out passive debugging to load terminal impedance, observe impedance
The linearity；
Comprehensive tester 2 is connect by coaxial line with RF power amplification 4, the linearity for measuring RF power amplification 4 and output
Power；
Programmable power supply 3 is put with radio frequency work(4 by power cord and is connect, and is penetrated for providing supply voltage to RF power amplification and measuring
The current value of frequency power amplifier；
Computer 1 is connect by data line with RF power amplification 4, and program-controlled radio-frequency power amplifier is used for, and computer also passes through GPIB lines
(general-purpose interface line) is connect with comprehensive tester 2, and computer is also connect by GPIB lines with programmable power supply.Computer is for executing
Debugging routine selects the bias parameters of current value minimum in the first predetermined linear degree section, is additionally operable in minimum bias parameters
And under environment of the output power in preset power interval, control programmable power supply stepping reduces the power supply electricity of RF power amplification
Pressure, is additionally operable to select linearity supply voltage minimum in the second predetermined linear degree section；Computer is additionally operable to work as output work
Rate is more than the upper limit of the power value in the power interval of setting, and control programmable power supply reduces input power；It is set when output power is less than
Lower limit of the power value in fixed power interval, control programmable power supply improve input power, output power are made to fall into the power of setting
In section.The active debugging part (two step 203-219 of embodiment) of adjustment method of the present invention, can be executed by computer
Specific debugging routine can greatly shorten debug time using software replacement part manpower debugging efforts, shorten opening for project
It sends out the period and saves human cost.
RF power amplification 4 is matched with target impedance, for amplifying input signal, then exports the signal of amplification.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not limiting
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (10)
1. a kind of adjustment method of RF power amplification, which is characterized in that include the following steps：
S1, the load terminal impedance of RF power amplification is transformed to by target impedance by passive debugging；
S2, all effective bias values for obtaining the RF power amplification after load terminal impedance transformation, for each effective bias
Value：The electric signal of the bias values and default supply voltage are applied on the RF power amplification after load terminal impedance transformation, adjustment
The input power of RF power amplification simultaneously measures corresponding output power, stops adjusting when output power falls into preset power interval
It is whole, obtain the linearity and output current of RF power amplification at this time, as the RF power amplification corresponding to the bias values the linearity and
Output current；
S3, a bisa value is chosen from each effective bias values, which meets its corresponding linearity and fall into the
In one predetermined linear degree section and its corresponding output current is minimum；
The initial supply voltage of the electric signal of the bisa values and one is applied to load end by S4, the bisa values for selected taking-up
On RF power amplification after impedance transformation, supply voltage is reduced with certain stepping since the initial supply voltage, for
Supply voltage after reducing every time：Under the supply voltage, adjusts the input power of RF power amplification and measure corresponding output work
Rate stops adjustment when output power falls into preset power interval, obtains and judge that the linearity of RF power amplification at this time is
It is no to fall into the second predetermined linear degree section, if it is continue to reduce supply voltage at this time, conversely, then recording confession at this time
Supply voltage before piezoelectric voltage reduction；
S5, using the selected bisa values selected, the supply voltage recorded as the running parameter of RF power amplification.
2. the adjustment method of RF power amplification as described in claim 1, it is characterised in that：It is still further comprised before step S2
After load terminal impedance transformation effective bias values in pre-set interval are selected in the bias values of RF power amplification.
3. the adjustment method of RF power amplification as described in claim 1, it is characterised in that：It is also further in step S2 and S4
Including：If output power is more than the upper limit of the power value in the power interval of setting, input power is reduced；It is set if output power is less than
Lower limit of the power value in fixed power interval, then improve input power.
4. the adjustment method of RF power amplification as described in claim 1, it is characterised in that：In step s 4, it is dropped with 0.1V steppings
Low suppling voltage.
5. the adjustment method of RF power amplification as described in claim 1, it is characterised in that：In step s 5, further include record work
Make the corresponding power consumption of parameter, the linearity and output power.
6. the adjustment method of RF power amplification as described in claim 1, it is characterised in that：Pass through passive debugging in the step S1
The load terminal impedance of RF power amplification is transformed to target impedance, including：By giving the RF power amplification electrical connection matching material, make
The actual loading terminal impedance for obtaining RF power amplification changes to target impedance.
7. the adjustment method of RF power amplification as described in claim 1, it is characterised in that：The target impedance is one preset solid
The impedance of definite value, alternatively, the linearity of RF power amplification is fallen when the target impedance is in passive debugging as load terminal impedance
Enter the impedance in third predetermined linear degree section.
8. the adjustment method of RF power amplification as described in claim 1, it is characterised in that：The target impedance is in passive debugging
The linearity of RF power amplification falls into the impedance in third predetermined linear degree section when the middle terminal impedance as load, and the target hinders
The power consumption of RF power amplification falls into the impedance in preset power consumption section when resisting in passive debugging as load terminal impedance.
9. the adjustment method of RF power amplification as described in claim 1, it is characterised in that：The second predetermined linear degree section
Lower limiting value is greater than or equal to the lower limiting value in the first predetermined linear degree section, and the upper limit value in the second predetermined linear degree section is less than
Or the upper limit value equal to the first predetermined linear degree section.
10. the adjustment method of RF power amplification as described in claim 1, it is characterised in that：Debugging routine is executed by computer,
The bias values for selecting output current value minimum in the first predetermined linear degree section, by computer in the bias values selected and
Under conditions of output power is in preset power interval, control programmable power supply stepping reduces the supply voltage of RF power amplification, leads to
Cross the linearity supply voltage minimum in the second predetermined linear degree section that computer selects RF power amplification.
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| CN201810284253.4A CN108540100A (en) | 2018-04-02 | 2018-04-02 | A kind of adjustment method of RF power amplification |
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| CN106998232A (en) * | 2017-03-22 | 2017-08-01 | 普联技术有限公司 | A kind of method for obtaining RF power amplification load pull parameters |
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|---|---|---|---|---|
| CN1515069A (en) * | 2001-04-04 | 2004-07-21 | �����ɷ� | Bias adjustment for power amplifier |
| CN1476163A (en) * | 2002-07-17 | 2004-02-18 | Method and device for operating emission amplifier | |
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Application publication date: 20180914 |