CN108683412A - A kind of multichannel power synthesis circuit applied to out-phase power amplifying system - Google Patents
A kind of multichannel power synthesis circuit applied to out-phase power amplifying system Download PDFInfo
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- CN108683412A CN108683412A CN201810320568.XA CN201810320568A CN108683412A CN 108683412 A CN108683412 A CN 108683412A CN 201810320568 A CN201810320568 A CN 201810320568A CN 108683412 A CN108683412 A CN 108683412A
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- power
- phase
- chireix
- synthesis circuit
- combiners
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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
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
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Abstract
The present invention relates to a kind of multichannel power synthesis circuits applied to out-phase power amplifying system.The present invention includes multichannel out-phase power synthesis circuit.Multichannel out-phase power synthesis circuit is serially connected between multiple switch power-like amplifier and load, includes phase adjusting module and out-phase power combing module per road out-phase power synthesis circuit.The output load impedance of the power amplifier of each branch is adjusted on Smith chart about the symmetrical position of real axis by phase adjusting module；Out-phase power combing module is used to the load impedance of derived power amplifier reducing requirement of each road load for phase close to pure resistance.Four Switch power amplifier outputs connect out-phase power synthesis circuit all the way.The structure that the present invention improves Chireix power combiners makes the real part of load impedance close to ohmic load, reduces the phase requirements of the output impedance to derived power amplifier, improves the linearity, output power and the efficiency of integrated circuit.
Description
Technical field
The invention belongs to radio-frequency communication technical fields, are related to a kind of multichannel power conjunction applied to out-phase power amplifying system
At circuit.
Background technology
With the rapid development of wireless communication technique, frequency microwave technology is more and more important in daily life.
In order to advocate energy-saving and environment-friendly today, more energy, communication quotient's generally use high linearity, high efficiency and height output are saved
The power amplifying system of power, and constant envelope signal being amplified using traditional out-phase power amplifying system, it the advantages of
It is that there is very high output power and efficiency, there is the very high linearity for the modulated signal of output.But traditional out-phase
The use condition for the Chireix power combings that power amplifying system uses is very high, the phase of the output impedance of derived power amplifier
Position must it is complete on the contrary, otherwise linearity index, output power and the efficiency of whole system can be produced bigger effect, so
The combiner circuit of out-phase power amplifying system becomes one of the research hotspot of academia and industrial quarters.Out-phase power how is improved to put
The linearity, output power and the efficiency of the combiner circuit of big system become one of the hot spot of academia and industrial quarters.Usual out-phase
The combiner circuit of power amplifying system designs the various parameters in traditional Chireix power combiners by formula, reaches
Promote the linearity, output power and efficiency.
The power combiner that existing out-phase power amplifying system uses is that traditional Chireix power as shown in Figure 1 closes
It grows up to be a useful person.However applicant has found under study for action, actually traditional Chireix power combiners are for derived power amplifier
The requirement of the phase of output impedance is excessively harsh, otherwise just to the linearity of entire out-phase power amplifying system, output power and
Efficiency has a very big impact, however the realization condition of traditional Chireix power combiners too idealizes, and is realized in reality
Get up excessively complicated.But with the fast development of the communication technology, the requirement for RF communication system be also it is higher and higher, for
The realization condition of traditional Chireix power combiners is too harsh, cannot meet the requirement of current wireless communication system,
Therefore, it is badly in need of developing a kind of multichannel power synthesis circuit raising system linear degree applied to out-phase power amplifying system, defeated
Go out power and efficiency to meet the requirement of current and future wireless communication system high-transmission digit rate.High linearity, high power and height
The efficiency power amplification system also natural hot spot for becoming academia and industrial quarters research.As a result, to traditional
Chireix power combiners are analyzed, and are improved, and a kind of multichannel work(applied to out-phase power amplifying system is devised
Rate combiner circuit.
Invention content
It is an object of the invention to provide a kind of multichannel power synthesis circuits applied to out-phase power amplifying system.
The present invention includes multichannel out-phase power synthesis circuit.The multichannel out-phase power synthesis circuit is serially connected in multiple open
It closes between power-like amplifier and load, includes phase adjusting module and out-phase power combing mould per road out-phase power synthesis circuit
Block.The output load impedance of the power amplifier of each branch is adjusted on Smith chart about real axis by phase adjusting module
Symmetrical position；Out-phase power combing module is used to the load impedance of derived power amplifier reducing each road close to pure resistance
Load the requirement for phase.Four Switch power amplifier outputs connect out-phase power synthesis circuit all the way, as out-phase
Four input signals of power synthesis circuit.
The phase adjusting module includes four straight microstrip lines, and one end of each straight microstrip line connects a Switch respectively
The output end of power amplifier；The other end of the straight microstrip line of each two is connect by two microstrip lines of placement normal thereto different respectively
Two input terminals of first or second Chireix power combiners in phase power combing module.
The out-phase power combing module includes three Chireix power combiners, each Chireix power combiners
Including two fan-shaped offset of microstrip lines and two straight microstrip lines；Two output ends connection of first Chireix power combiners is followed by the
Two output ends connection of one input terminal of three Chireix power combiners, the 2nd Chireix power combiners is followed by third
Two output ends connection of another input terminal of Chireix power combiners, the 3rd Chireix power combiners is followed by bearing
It carries.
The rf inputs of two fan-shaped offset of microstrip lines of Chireix power combiners respectively with two straight microstrip lines one
Two input terminals after the connection of end as Chireix power combiners, the other end of two straight microstrip lines is as Chireix power
Two output ends of synthesizer.
The load impedance is 50 Europe.
The out-phase pilot angle θ of the four-way switch power-like amplifier output signal andRelationship such as formula is (7)：
V0For the amplitude of applied signal voltage wave, RLFor load impedance, X1For the reactance of branch, PoutFor output power.
The present invention is mainly made of microstrip line, and reducing the parasitic parameter generated using lump original paper influences total system
Performance.Branch's microstrip line therein is changed to fan-shaped offset of microstrip line by the Chireix power combiners used, prevents microstrip line ground connection from leading
Power leakage is caused, the power and efficiency of circuit are reduced.Structure by improving traditional Chireix power combiners to load
The real part of impedance reduces the phase requirements of the output impedance to derived power amplifier close to ohmic load, improves whole
The linearity, output power and the efficiency of circuit.
Description of the drawings
Fig. 1 is the schematic diagram of tradition Chireix power combiners；
Fig. 2 is the multichannel power synthesis circuit block diagram for being applied to out-phase power amplifying system in the present invention；
Fig. 3 is the Chireix power combiner schematic diagrams for possessing phase adjusting module in the embodiment of the present invention；
Fig. 4 is that load impedance modulates track Smith chart in the embodiment of the present invention；
Fig. 5 is the schematic diagram of out-phase power synthesis circuit all the way of the invention；
Fig. 6 is tradition Chireix power combiners and multichannel out-phase power synthesis circuit working efficiency pair in the present embodiment
Than figure；
Fig. 7 is tradition Chireix power combiners and multichannel out-phase power synthesis circuit output power pair in the present embodiment
Than figure.
Specific implementation mode
As shown in Fig. 2, a kind of multichannel power synthesis circuit applied to out-phase power amplifying system, including multichannel out-phase work(
Rate combiner circuit.Include phase adjusting module 1 and out-phase power combing module 2 per road out-phase power synthesis circuit.Phase adjustment
The output load impedance of the power amplifier of each branch is adjusted on Smith chart about the symmetrical position of real axis by module 1
It sets；Out-phase power combing module 2 be used to reduce the load impedance of derived power amplifier close to pure resistance each road load for
The requirement of phase.Multichannel out-phase power synthesis circuit be serially connected in multiple switch power-like amplifier (voltage source is equivalent in figure) and
It is negative to the output of derived power amplifier for reducing Chireix power combiners in out-phase power combing module between load
The phase requirements of load.Four Switch power amplifier outputs connect out-phase power synthesis circuit all the way.
Each Chireix power combiners include two fan-shaped offset of microstrip lines and two straight microstrip lines, two fan-shaped offset of microstrip lines
Rf inputs connect respectively with two straight microstrip line one end after two input terminals as Chireix power combiners, two
Two output ends of the other end of a straight microstrip line as Chireix power combiners.
Phase adjusting module 1 includes four straight microstrip lines, one end of the first straight microstrip line TL1, the 4th straight microstrip line TL4
One end of the microstrip line TL11 always of one end, one end of the 8th straight microstrip line TL8, the tenth connects a switch power-like amplifier respectively
Output end；The other end of first straight microstrip line TL1, the other end of the 4th straight microstrip line TL4 pass through placement normal thereto respectively
The second straight microstrip line TL2, the 5th straight microstrip line TL5 connect the first Chireix power combiners in out-phase power combing module
Two input terminals.The other end of the microstrip line TL11 always of the other end of 8th straight microstrip line TL8, the tenth is respectively by normal thereto
The 9th straight microstrip line TL9, the 12nd straight microstrip line TL12 placed connects the 2nd Chireix power in another out-phase power combing module
Two input terminals of synthesizer.
Out-phase power combing module 2 includes three Chireix power combiners, and the first Chireix power combiners include
First fan-shaped offset of microstrip line STUB1, the second fan-shaped offset of microstrip line STUB2, the straight microstrip line TL3 of third, the 6th straight microstrip line TL6；Second
Chireix power combiners include third fan-shaped offset of microstrip line STUB3, four fan-shaped microstrip line STUB4, the tenth straight microstrip line
TL10, the 13rd straight microstrip line TL13；3rd Chireix power combiners include the 5th fan-shaped offset of microstrip line STUB5, the 6th sector
Microstrip line STUB6, the 7th straight microstrip line TL7, the 14th straight microstrip line TL14；Two of first Chireix power combiners are defeated
Outlet connects an input terminal for being followed by the 3rd Chireix power combiners, two outputs of the 2nd Chireix power combiners
End connection is followed by another input terminal of the 3rd Chireix power combiners, two outputs of the 3rd Chireix power combiners
End connection is followed by the load that impedance is 50 Europe.
As shown in figure 3, by taking the input of double switch power-like amplifier as an example, from combining point to the impedance such as formula of each branch
⑴：
Wherein I1And I2For the electric current of upper and lower two-way, RLFor load impedance.
Two-way branch current passes through phase variantIt is expressed as formula (2)：
Wherein A1And A2It is current phase amplitude, (1) (2) (3) formula is obtained with formula by formula：
So the admittance Y seen from voltage source1, Y2It is expressed as formula (4)：
Wherein BCFor the compensation susceptance of phase adjusting structure；
It is as shown in Figure 4 by track of the formula (4) on Smith chart that load impedance modulates track.When two branch electricity
Flow the equal (A of amplitude1=A2) when, load modulation track is identical as tradition Chireix power combiners.By adding supplement shunting
Element compensates susceptance so that load modulation track is rotated to symmetrical about Smith chart real axis, so as to more easily support
Disappear the imaginary part of two-way impedance, to promote the performance of out-phase power amplifying system.
As shown in figure 5, for switching power-like amplifier input, four-way switch power-like amplifier output voltage difference
For V1、V2、V3、V4, the out-phase pilot angle of four-way switch power-like amplifier output signal be θ andRelationship such as formula is (5)：
V0For the amplitude of applied signal voltage wave, RLFor load impedance, X1For the reactance of branch, load voltage VRAnd output
Power POUTFormula such as formula (6)：
(7) calculated by formula best θ andValue：
By calculated best θ andValue so that the load having the same resistance of branch switch power-like amplifier
It is anti-, and these input impedance are close to pure resistance.
Due to consideration that ghost effect of the capacitor and inductor in high-frequency circuit, so saying that lamped element therein is all substituted for
Fan-shaped offset of microstrip line form, that is, the influence of parasitic parameter can be reduced by being conducive to spread bandwidth again, increase the performance of system.
Referring to Fig. 6 and Fig. 7, the contrast test figure showing between technical solution of the present invention and the prior art therefrom can be with
Find out, in frequency band, the power combining efficiency of traditional Chireix power combiners is 59%-63%, and output power is
20.54W-24.14W, power combining efficiency efficiency of the invention be 69%-71%, output power 24.21W-26.45W,
Using technical scheme of the present invention, power combining efficiency and output power have the increase of certain amplitude, illustrate that multichannel power closes
It makes moderate progress to the effect of circuit at circuit.
The course of work and principle：In the multichannel power synthesis circuit applied to out-phase power amplifying system, use not
The signal of opposite in phase, but using the out-phase pilot angle being calculated in embodiment be θ andInput signal.Phase tune
The output impedance of the power amplifier of each branch is adjusted on Smith chart about the symmetrical position of real axis by mould preparation block；It is different
Phase power combing module is used to the load impedance of derived power amplifier reducing each road load impedance for phase close to pure resistance
The requirement of position.Multichannel out-phase power synthesis circuit is for reducing Chireix power combiners in out-phase power combing module to dividing
The phase requirements of the output loading of branch power amplifier.
The explanation of above example is only intended to facilitate the understanding of the method and its core concept of the invention.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Some improvements and modifications, these improvement and modification are also fallen within the protection scope of the claims of the present invention.To these embodiments
A variety of modifications are it will be apparent that General Principle defined herein can be for those skilled in the art
It is realized in other embodiments in the case of not departing from the spirit or scope of the present invention.Therefore, the present invention is not intended to be limited to
These embodiments shown in the application, and be to fit to consistent with principle disclosed in the present application and features of novelty widest
Range.
Claims (4)
1. a kind of multichannel power synthesis circuit applied to out-phase power amplifying system, including multichannel out-phase power synthesis circuit；
It is characterized in that：The multichannel out-phase power synthesis circuit is serially connected between multiple switch power-like amplifier and load, often
Road out-phase power synthesis circuit includes phase adjusting module and out-phase power combing module；Phase adjusting module is by the work(of each branch
The output load impedance of rate amplifier is adjusted on Smith chart about the symmetrical position of real axis；Out-phase power combing module
For the load impedance of derived power amplifier close to pure resistance, to be reduced requirement of each road load for phase；Four switches
Power-like amplifier output terminates out-phase power synthesis circuit all the way, four input signals as out-phase power synthesis circuit；
The phase adjusting module includes four straight microstrip lines, and one end of each straight microstrip line connects a Switch power respectively
The output end of amplifier；The other end of the straight microstrip line of each two connects out-phase work(by two microstrip lines of placement normal thereto respectively
Two input terminals of first or second Chireix power combiners in rate synthesis module；
The out-phase power combing module includes three Chireix power combiners, and each Chireix power combiners include
Two fan-shaped offset of microstrip lines and two straight microstrip lines；Two output ends connection of first Chireix power combiners is followed by third
Two output ends connection of one input terminal of Chireix power combiners, the 2nd Chireix power combiners is followed by third
Two output ends connection of another input terminal of Chireix power combiners, the 3rd Chireix power combiners is followed by bearing
It carries.
2. a kind of multichannel power synthesis circuit applied to out-phase power amplifying system as described in claim 1, feature exist
In：The rf inputs of two fan-shaped offset of microstrip lines of Chireix power combiners connect with two straight microstrip line one end respectively
As two input terminals of Chireix power combiners after connecing, the other end of two straight microstrip lines is as Chireix power combings
Two output ends of device.
3. a kind of multichannel power synthesis circuit applied to out-phase power amplifying system as described in claim 1, feature exist
In：The load impedance is 50 Europe.
4. a kind of multichannel power synthesis circuit applied to out-phase power amplifying system as described in claim 1, feature exist
In：The out-phase pilot angle θ of the four-way switch power-like amplifier output signal andRelationship such as formula is (7)：
V0For the amplitude of applied signal voltage wave, RLFor load impedance, X1For the reactance of branch, PoutFor output power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810320568.XA CN108683412A (en) | 2018-04-11 | 2018-04-11 | A kind of multichannel power synthesis circuit applied to out-phase power amplifying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810320568.XA CN108683412A (en) | 2018-04-11 | 2018-04-11 | A kind of multichannel power synthesis circuit applied to out-phase power amplifying system |
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| CN108683412A true CN108683412A (en) | 2018-10-19 |
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| CN201810320568.XA Pending CN108683412A (en) | 2018-04-11 | 2018-04-11 | A kind of multichannel power synthesis circuit applied to out-phase power amplifying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111865236A (en) * | 2019-04-25 | 2020-10-30 | 华为技术有限公司 | Signal processing method, device and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03238908A (en) * | 1990-02-15 | 1991-10-24 | Mitsubishi Electric Corp | High efficiency semiconductor amplifier |
| US20140225671A1 (en) * | 2011-08-29 | 2014-08-14 | The University Of Electro-Communications | High efficiency power amplifier |
| US20170133990A1 (en) * | 2015-11-06 | 2017-05-11 | Infineon Technologies Ag | Outphasing power amplifier signal splitter using next stage input impedance and multiple biasing |
-
2018
- 2018-04-11 CN CN201810320568.XA patent/CN108683412A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03238908A (en) * | 1990-02-15 | 1991-10-24 | Mitsubishi Electric Corp | High efficiency semiconductor amplifier |
| US20140225671A1 (en) * | 2011-08-29 | 2014-08-14 | The University Of Electro-Communications | High efficiency power amplifier |
| US20170133990A1 (en) * | 2015-11-06 | 2017-05-11 | Infineon Technologies Ag | Outphasing power amplifier signal splitter using next stage input impedance and multiple biasing |
Non-Patent Citations (1)
| Title |
|---|
| TAYLOR W. BARTON: "Four-Way Microstrip-Based Power Combining for Microwave Outphasing Power Amplifiers", 《IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS—I: REGULAR PAPERS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111865236A (en) * | 2019-04-25 | 2020-10-30 | 华为技术有限公司 | Signal processing method, device and system |
| CN111865236B (en) * | 2019-04-25 | 2022-07-26 | 华为技术有限公司 | Signal processing method, device and system |
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