CN108880501A - A kind of broadband out-phase power combiner - Google Patents
A kind of broadband out-phase power combiner Download PDFInfo
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- CN108880501A CN108880501A CN201810653508.XA CN201810653508A CN108880501A CN 108880501 A CN108880501 A CN 108880501A CN 201810653508 A CN201810653508 A CN 201810653508A CN 108880501 A CN108880501 A CN 108880501A
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- Prior art keywords
- microstrip line
- power combiner
- circuit
- chireix
- output
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
Abstract
The present invention relates to a kind of broadband out-phase power combiners.The present invention includes including switch power-like amplifier, Chireix power combiner, bandwidth broadning circuit.The Chireix power combiner is serially connected between switch power-like amplifier and load；Bandwidth broadning circuit is concatenated between Chireix power combiner and load.Circuit is inputted simultaneously by two-way out-phase Broad-band Modulated Signal, wherein upper branch inputs forward signal, and lower branch inputs negative-going signal, and two paths of signals is integrated by Chireix power combiner, it is exported by bandwidth broadning circuit, the signal of output, which is supported, to be absorbed.The present invention reduces the quality factor of match circuit using bandwidth broadning circuit by using staged impedance matching, the synthesis of signal of communication for WCDMA signal and LTE signal etc. with certain bandwidth has larger impact, to influence the linearity in entire passband, output power and efficiency.
Description
Technical field
The invention belongs to radio-frequency communication technical fields, are related to a kind of broadband out-phase power combiner.
Background technique
With the development of communication technology, since demand of the people for communication is higher and higher, lead to present common carrier
It include the WCDMA signal of 5MHz bandwidth and the LTE signal of 20MHz and quilt later using the signal of communication to become increasingly complex
Signal applied to 5G communication system.In order to which for these modulated signals with certain bandwidth, researcher must be designed
The power amplifying system of certain bandwidth is provided, out-phase power amplifying system has high linearity, high efficiency and high-output power
Many merits, traditional out-phase power amplifying system amplifies constant envelope signal, its advantages be have it is very high defeated
Power and efficiency out have the very high linearity for the modulated signal of output.But traditional out-phase power amplifying system makes
Chireix power combiner is according to single-frequency point design, so the narrower bandwidth of this synthesizer, for WCDMA signal
With LTE signal and the synthesis of the signal of communication with certain bandwidth has larger impact, to influence linear in entire passband
Degree, output power and efficiency, so broadband out-phase power combiner becomes one of academia and the research hotspot of industry.How
The bandwidth for improving out-phase power combiner becomes one of academia and the hot spot of industry.
Existing out-phase power combiner is traditional Chireix power combiner as shown in Figure 1.However applicant is grinding
Study carefully middle discovery, actually traditional Chireix power combiner be according to single-frequency point design, so the bandwidth of this synthesizer compared with
It is narrow, there is larger impact for the amplification of the signal of communication with certain bandwidth, otherwise just to entire out-phase power amplifying system
The linearity, output power and efficiency have a very big impact, so traditional out-phase power combiner is no longer satisfied and works as
A kind of broadband out-phase power combiner raising bandwidth is developed in the requirement of modern communication system, therefore, urgent need, meets system in passband
The linearity, output power and efficiency to meet the requirement of current and future wireless communication system high-transmission digit rate.How to improve
The bandwidth of out-phase power combiner becomes the hot spot of academia and industry research.A kind of broadband out-phase function is devised as a result,
Rate synthesizer.
Summary of the invention
It is an object of the invention to provide a kind of broadband out-phase power combiners.
The present invention includes switch power-like amplifier, Chireix power combiner, bandwidth broadning circuit.Described
Chireix power combiner is serially connected between switch power-like amplifier and load；In Chireix power combiner and load
Between concatenate bandwidth broadning circuit；Circuit is inputted simultaneously by two-way out-phase Broad-band Modulated Signal, wherein upper branch input
It is forward signal, lower branch input is negative-going signal, and two paths of signals is integrated by Chireix power combiner, is led to
It crosses bandwidth broadning circuit to be exported, the signal of output, which is supported, to be absorbed.
The bandwidth broadning circuit includes the microstrip line of n concatenation, and one end of the microstrip line of n concatenation is opened up as bandwidth
Open up the input terminal of circuit, output end of the other end as bandwidth broadning circuit；N is the integer more than or equal to 1.
The Chireix power combiner includes two fan-shaped offset of microstrip lines and the identical straight microstrip line of two structures；
Conduct after the rf inputs of two fan-shaped offset of microstrip lines of Chireix power combiner are connect with two straight microstrip line one end respectively
Two input terminals of Chireix power combiner, two as Chireix power combiner of the other end of two straight microstrip lines
Output end.Two output ends connection of Chireix power combiner is followed by the input terminal of bandwidth broadning circuit.Bandwidth broadning circuit
Output terminating load.
Preferably, the Chireix power combiner includes two structures identical straight microstrip line TL1, TL2, directly
Branch where microstrip line TL1 is upper branch, and branch where straight microstrip line TL2 is lower branch；Bandwidth broadning circuit is two straight micro-
Band line TL3, TL4 are concatenated.The output impedance of upper branch is Z1, the output impedance of lower branch is Z2, total output impedance is Z3, 2Z3
=Z1=Z2。
Microstrip line TL4 is the microstrip line of λ/4, i.e.,Wherein ZC2It is the characteristic impedance of microstrip line TL4, RLIt is negative
It carries, load impedance is 50 Europe.Microstrip line TL3 is the microstrip line of λ/4, similarlyZC1It is the feature resistance of microstrip line TL3
It is anti-；?ThenMicrostrip line TL1 is the microstrip line of λ/4, thenObtain microstrip line
(4) the characteristic impedance relationship of TL1, TL2, TL3, TL4 meet formula：
Y1Admittance is entered and left for upper branch.
The upper branch enters and leaves admittance Y1It is obtained by following step：
The input voltage formula such as formula of two branches is (1) shown：
Wherein V0It is voltage amplitude, θ is phase angle.V1It is the input voltage of upper branch, V2It is the input voltage of lower branch；
θ、V1、V2For known quantity.
It is theoretical by transmission line theory and Two-port netwerk, see formula (2), formula (3)：
VoutFor output voltage；ZCIt is the characteristic impedance of microstrip line TL1, TL2, I3It is the output electric current of upper branch, I4Under being
The output electric current of branch.
Then obtain the total current of output
Upper and lower branch input current
The then input admittance of upper branch
The input admittance of lower branch
The compensation susceptance of upper branch input admittance is
The compensation susceptance of lower branch input admittanceWherein
BcomFor branch shunt compensation susceptance, load impedance is 50 Europe.
The present invention reduces the quality factor of match circuit using bandwidth broadning circuit by using staged impedance matching, right
There is larger impact in the synthesis of WCDMA signal and LTE signal and the signal of communication with certain bandwidth, to influence entire logical
The linearity, output power and efficiency in band.Ghost effect of the capacitor and inductor in high-frequency circuit is considered simultaneously, using sector
For microstrip line as the lamped element in vent diverter, that is, the influence of parasitic parameter can be reduced by being conducive to spread bandwidth again, be increased
The performance of system.
Detailed description of the invention
Fig. 1 is the isoboles of traditional Chireix power combiner；
Fig. 2 is overall structure diagram of the invention；
Fig. 3 is the broadband out-phase power combiner schematic diagram that the present invention possesses bandwidth broadning circuit；
Fig. 4 is the broadband out-phase power combiner schematic diagram that the present invention possesses thus bypasses element；
Fig. 5 is that tradition Chireix power combiner and broadband out-phase power combiner efficiency comparative scheme；
Fig. 6 is tradition Chireix power combiner and broadband out-phase power combiner output power comparison diagram.
Specific embodiment
As shown in Fig. 2, a kind of broadband out-phase power combiner, including switch power-like amplifier 1, Chireix power close
It grows up to be a useful person 2, bandwidth broadning circuit 3.Chireix power combiner 2 is serially connected in switch power-like amplifier 1 and (is equivalent to voltage in figure
Source) and load between；Bandwidth broadning circuit 3 is concatenated between Chireix power combiner 2 and load.It is wide by two-way out-phase
Band modulated signal simultaneously inputs circuit, wherein upper branch input is forward signal, lower branch input is negative sense letter
Number, two paths of signals is integrated by Chireix power combiner, is exported by bandwidth broadning circuit, the signal of output
It is supported and is absorbed.
Bandwidth broadning circuit 3 includes the microstrip line of n concatenation, and one end of the microstrip line of n concatenation is as bandwidth broadning electricity
The input terminal on road, output end of the other end as bandwidth broadning circuit；N is the integer more than or equal to 1.
Chireix power combiner 2 includes two fan-shaped offset of microstrip lines and the identical straight microstrip line of two structures；Chireix
The rf inputs of two fan-shaped offset of microstrip lines of power combiner are used as Chireix function after connecting respectively with two straight microstrip line one end
Two input terminals of rate synthesizer, two output ends of the other end of two straight microstrip lines as Chireix power combiner.
Two output ends connection of Chireix power combiner is followed by the input terminal of bandwidth broadning circuit.The output of bandwidth broadning circuit
Terminating load.
Embodiment one, as shown in figure 3, Chireix power combiner include the identical straight microstrip line TL1 of two structures,
TL2, branch where straight microstrip line TL1 are upper branch, and branch where straight microstrip line TL2 is lower branch；Bandwidth broadning circuit is two
A straight microstrip line TL3, TL4 concatenation.The output impedance of upper branch is Z1, the output impedance of lower branch is Z2, total output impedance is
Z3, 2Z3=Z1=Z2。
Microstrip line TL4 is the microstrip line of λ/4, i.e.,Wherein ZC2It is the characteristic impedance of microstrip line TL4, RLIt is negative
It carries, load impedance is 50 Europe.Microstrip line TL3 is the microstrip line of λ/4, similarlyZC1It is the feature resistance of microstrip line TL3
It is anti-；?ThenMicrostrip line TL1 is the microstrip line of λ/4, then
Show (4) the characteristic impedance relationship of microstrip line TL1, TL2, TL3, TL4 meet formula：
The input voltage formula such as formula of two branches is (1) shown：
Wherein V0It is voltage amplitude, θ is phase angle.V1It is the input voltage of upper branch, V2It is the input voltage of lower branch；
θ、V1、V2For known quantity.
It is theoretical by transmission line theory and Two-port netwerk, see formula (2), formula (3)：
VoutFor output voltage；ZCIt is the characteristic impedance of microstrip line TL1, TL2, I3It is the output electric current of upper branch, I4Under being
The output electric current of branch.
Then obtain the total current of output
Upper and lower branch input current
The then input admittance of upper branch
The input admittance of lower branch
By upper branch input admittance Y1Bring (4) characteristic impedance relationship that formula obtains microstrip line TL1, TL2, TL3, TL4 into.
Secondly it calculates compensation susceptance adjustment phase place and sees wherein Y as shown in figure 4, the input admittance of compensation susceptance is added1' be
The upper branch input admittance of compensation susceptance, Y is added2' it is the lower branch input admittance that compensation susceptance is added：
Wherein BcomFor branch shunt compensation susceptance, load
Impedance is 50 Europe.
In view of ghost effect of the capacitor and inductor in high-frequency circuit, using fan-shaped offset of microstrip line as the collection in vent diverter
Total element, that is, the influence of parasitic parameter can be reduced by being conducive to spread bandwidth again, increase the performance of system.
The Chireix power combiner that traditional out-phase power amplifying system uses be according to single-frequency point design, so this
The narrower bandwidth of kind of synthesizer, for the synthesis of WCDMA signal and LTE signal and the signal of communication with certain bandwidth have compared with
It is big to influence, so that the linearity in entire passband, output power and efficiency are influenced, broadband out-phase power combiner of the invention
Bandwidth broadning circuit reduces the quality factor of match circuit by using staged impedance matching, due toWherein BW
For the bandwidth of circuit, f0 isCentre frequency, to promote the bandwidth of circuit.
As it can be seen in figures 5 and 6, therefrom finding out, in frequency band, traditional Chireix power combiner and Ben Fa are used respectively
The out-phase power amplifying system of bright technical solution, the efficiency using traditional Chireix power combiner are 50%-58%,
Output power is 20.04W-22.5W, is 66%-68% using power power amplifying system efficiency of the invention, and output power is
24.08W-26.3W wherein having increased about the bandwidth of 200MHz, and is expanded using technical solution of the present invention, band
Wide, efficiency and output power have the increase of certain amplitude, illustrate that broadband out-phase power combiner changes the effect of circuit
It is kind.
The design simultaneously inputs circuit by two-way out-phase Broad-band Modulated Signal, and what wherein top set inputted is positive
To signal, inferior division input is negative-going signal, and two paths of signals is integrated by Chireix power combiner, passes through bandwidth
It expands circuit to be exported, the signal of output, which is supported, to be absorbed.
The above description of the embodiment is only used to help understand the method for the present invention and its core ideas.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 improvements and modifications also fall within the scope of protection 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 where 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 broadband out-phase power combiner, including switch power-like amplifier, Chireix power combiner, bandwidth broadning
Circuit；It is characterized in that：The Chireix power combiner is serially connected between switch power-like amplifier and load；?
Bandwidth broadning circuit is concatenated between Chireix power combiner and load；By two-way out-phase Broad-band Modulated Signal simultaneously to electricity
Road is inputted, wherein upper branch input is forward signal, lower branch input is negative-going signal, and two paths of signals passes through
Chireix power combiner is integrated, and is exported by bandwidth broadning circuit, and the signal of output, which is supported, to be absorbed；
The bandwidth broadning circuit includes the microstrip line of n concatenation, and one end of the microstrip line of n concatenation is as bandwidth broadning electricity
The input terminal on road, output end of the other end as bandwidth broadning circuit；N is the integer more than or equal to 1；
The Chireix power combiner includes two fan-shaped offset of microstrip lines and the identical straight microstrip line of two structures；Chireix
The rf inputs of two fan-shaped offset of microstrip lines of power combiner are used as Chireix function after connecting respectively with two straight microstrip line one end
Two input terminals of rate synthesizer, two output ends of the other end of two straight microstrip lines as Chireix power combiner；
Two output ends connection of Chireix power combiner is followed by the input terminal of bandwidth broadning circuit；The output of bandwidth broadning circuit
Terminating load.
2. a kind of broadband out-phase power combiner as described in claim 1, it is characterised in that：The Chireix power closes
It grows up to be a useful person including two structures identical straight microstrip line TL1, TL2, branch where straight microstrip line TL1 is upper branch, straight microstrip line TL2
Place branch is lower branch；Bandwidth broadning circuit is two straight microstrip line TL3, TL4 concatenations；The output impedance of upper branch is Z1,
The output impedance of lower branch is Z2, total output impedance is Z3, 2Z3=Z1=Z2；
Microstrip line TL4 is the microstrip line of λ/4, i.e.,Wherein ZC2It is the characteristic impedance of microstrip line TL4, RLTo load,
Load impedance is 50 Europe；Microstrip line TL3 is the microstrip line of λ/4, similarlyZC1It is the characteristic impedance of microstrip line TL3；
?ThenMicrostrip line TL1 is the microstrip line of λ/4, thenObtain microstrip line
(4) the characteristic impedance relationship of TL1, TL2, TL3, TL4 meet formula：
Y1Admittance is entered and left for upper branch.
3. a kind of broadband out-phase power combiner as claimed in claim 2, it is characterised in that：The upper branch enters and leaves admittance
Y1It is obtained by following step：
The input voltage formula such as formula of two branches is (1) shown：
Wherein V0It is voltage amplitude, θ is phase angle；V1It is the input voltage of upper branch, V2It is the input voltage of lower branch；θ,V1、
V2For known quantity；
It is theoretical by transmission line theory and Two-port netwerk, see formula (2), formula (3)：
VoutFor output voltage；ZCIt is the characteristic impedance of microstrip line TL1, TL2, I3It is the output electric current of upper branch, I4It is lower branch
Output electric current；
Then obtain the total current of output
Upper and lower branch input current
The then input admittance of upper branch
The input admittance of lower branch
4. a kind of broadband out-phase power combiner as claimed in claim 2 or claim 3, it is characterised in that：The upper branch input
The compensation susceptance of admittanceThe compensation electricity of lower branch input admittance
It receivesWherein BcomFor branch shunt compensation susceptance, load impedance is
50 Europe.
Priority Applications (1)
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| CN201810653508.XA CN108880501A (en) | 2018-06-22 | 2018-06-22 | A kind of broadband out-phase power combiner |
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| CN201810653508.XA CN108880501A (en) | 2018-06-22 | 2018-06-22 | A kind of broadband out-phase power combiner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889162A (en) * | 2019-01-23 | 2019-06-14 | 杭州电子科技大学 | A kind of load modulation power-like amplifier and its implementation from input control |
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Application publication date: 20181123 |