CN209283190U - A kind of F power-like amplifier based on coupling loop resonant network - Google Patents
A kind of F power-like amplifier based on coupling loop resonant network Download PDFInfo
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- CN209283190U CN209283190U CN201920042744.8U CN201920042744U CN209283190U CN 209283190 U CN209283190 U CN 209283190U CN 201920042744 U CN201920042744 U CN 201920042744U CN 209283190 U CN209283190 U CN 209283190U
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Abstract
The utility model provides a kind of F power-like amplifier based on coupling loop resonant network, circuit includes input matching network network, grid, drain electrode biasing circuit, drain fundamental wave match circuit network and new harmonic control network of network, wherein biasing circuit provides stable operating voltage for transistor, match circuit network is that the source impedance and load impedance of transistor are respectively matched to 50 Ω, waveform is carried out to voltage and current waveform simultaneously to mould, make transistor drain voltage square wave, electric current is half-sine wave, to obtain higher power and efficiency.Compared with the existing technology, the harmonic controling network that the utility model passes through improvement F class power amplifier, it is not limited solely to secondary, the triple-frequency harmonics of control F class power amplifier, but increases the control order to F class power amplifier harmonic wave, and then also improve working efficiency while widening power amplifier bandwidth.
Description
Technical field
The utility model belongs to field of radio frequency communication, applies in channel radios such as mobile communication, electronic countermeasure, satellite communications
Letter field, the efficient F power-like amplifier of especially a kind of ultra wide band based on coupling loop resonant network.
Technical background
With the rapid development of wireless communication technique, technology for radio frequency is more and more important in people's daily life.
The signal frequency of wireless communication is higher and higher, and bandwidth is also more and more wider, thus in order to meet current and future mobile communications for
The requirement of high-speed, high capacity transmission, communication quotient are also further harsh to renewing for the power amplifier in wireless communication transmitter system, are
This generallys use extremely complex modulation system, this will will increase the complexity of circuit while can also lead increase error, and use
It is relatively low that traditional power amplifier such as A class, AB class amplify efficiency to signal, so taking into account wide bandwidth and efficient penetrating
Frequency power amplifier becomes the research hotspot of academia and industry.
RF power amplification unit is the core component in wireless communication system, in order to realize that signal transmits at a distance, ensures letter
Number reliable reception, must use power amplifier amplified signal in wireless communication system transmitting-receiving subassembly.It may be said that power amplification
The performance quality of device will directly influence the working condition of whole system.F class power amplifier is because it is with high efficiency, wide bandwidth, linear
The advantages that having spent and become the main object studied now.One typical F class power amplifier is that have input matching network, biased electrical
Road, output matching network and harmonic controling network composition.Harmonic controling network passes through the drain voltage electricity to power discharging transistor
Waveform remodeling is flowed, the voltage for being is square wave, and electric current is half-sine wave, respectively to voltage and current Fourier expansion, the even of voltage
Harmonic wave is zero, and the odd harmonic of electric current is zero, and so as to avoid the overlapping of voltage and current, harmonic impedance even-order harmonic is short-circuit,
Odd harmonic open circuit, so that higher hamonic wave power consumption is zero.
It is general to control secondary triple-frequency harmonics but for current traditional F class power amplifier harmonic controling network, and
F class power amplifier now be all by several segments short circuit or open circuit microstrip line it is series-parallel realize even-order harmonic impedance it is humorous be zero,
Odd harmonic is infinity, to reach the control to harmonic wave.Due to consideration that the complexity of circuit and given up higher hamonic wave
Control, which limits the promotions of its efficiency, to also limit widening for its bandwidth.
Therefore for drawbacks described above present in currently available technology, it is really necessary to be studied, to provide a kind of scheme,
Solve defect existing in the prior art.
Utility model content
In consideration of it, the utility model by improving traditional harmonic controling network, proposes that a kind of structure is simple and can be right
The efficient F power-like amplifier of the ultra wide band based on coupling loop resonant network that higher hamonic wave is controlled, passes through loop
Coupled harmonics control control of the network implementations to higher hamonic wave, can only control so as to improve traditional series-parallel stub to two
The shortcomings that secondary, triple-frequency harmonics；Meanwhile realizing that impedance matching can obtain broader bandwidth using coupling filter, it is more suitable for using
In the design for carrying out impedance matching network, the high efficiency of power amplifier also can guarantee while broadened bandwidth with this.
So to improve existing technological deficiency, using following technical scheme:
A kind of F power-like amplifier based on coupling loop resonant network includes at least input matching network, power amplifier list
Member, harmonic controling network and fundamental wave match circuit, wherein the harmonic controling network is connected with the output end of power amplifier unit
It connects, the power signal for exporting power amplifier unit carries out harmonic controling and exports through fundamental wave match circuit to load；
The harmonic controling network is coupling filter matching network, includes at least the first microstrip line TL1, the second microstrip line
TL2, the first parallel coupled line CLin1, the second parallel coupled line CLin2, the first loop wire Curve1, the second loop wire
Curve2, third loop wire Curve3 and Fourth Ring route Curve4, described one end first microstrip line TL1 and power amplifier unit it is defeated
It is connected out, the other end is connected with the first input end of the first parallel coupled line CLin1 and the second input terminal, and described
The first output end of one parallel coupled line CLin1 is connected with one end of the first loop wire Curve1, and described first is parallel
The second output terminal of coupling line CLin1 is connected with one end of the third loop wire Curve3；The one of the second microstrip line TL2
End is connected as output end with the fundamental wave match circuit, and the first of the other end and the second parallel coupled line CLin2
Output end is connected with second output terminal, the first input end of the second parallel coupled line CLin2 and second loop wire
One end of Curve2 is connected, the second input terminal and the Fourth Ring route Curve4 of the second parallel coupled line CLin2
One end be connected；The other end of the first loop wire Curve1 is connected with the other end of the second loop wire Curve2,
The other end of the third loop wire Curve3 is connected with one end of the Fourth Ring route Curve4.
Scheme as a further improvement, the power amplifier unit include at least gate bias network, drain electrode biasing networks and
Power discharging transistor.
Scheme as a further improvement, input impedance and power amplifier crystal of the input matching network for realizing circuit
The source impedance of pipe realizes conjugate impedance match to reach the input of maximum power.
Scheme as a further improvement, the gate bias circuit provides stable ﹣ 2.8V voltage for grid source, described
Drain electrode biasing circuit provides the burning voltage of 28V for drain-source.
Scheme as a further improvement, the harmonic controling network are to carry out waveform to drain voltage electric current to mould,
Make voltage in square wave, electric current is in half-sine wave, and even-order harmonic impedance is zero, and odd harmonic impedance is infinity, to keep away
The overlapping for having exempted from voltage and current realizes the raising of efficiency.
Traditional harmonic matching circuit network is to realize harmonic wave in parallel by the series connection of open circuit or short-circuit micro-band line
Control, due to the broader bandwidth of design, traditional matching process needs the appearance of the city a large amount of λ/4 stub in matching network, this
Circuit network can be made more complicated, be unfavorable for tune and the preprocessing in later period, therefore general only to the secondary and triple-frequency harmonics of circuit
Short circuit and open circuit control are carried out, and the filtering match circuit may be implemented to control higher hamonic wave, so as to further
It improves efficiency.
Scheme as a further improvement, the harmonic controling network are by Harmonic coupling line, arc-shaped micro-strip line, pipe nipple
The filter match network of the symmetrical structure of impedance line composition, may be implemented by Harmonic coupling filter matching network to high order
Odd even subharmonic is controlled.
Scheme as a further improvement, the Harmonic coupling line set its coefficient of coup C according to the frequency of power amplifier
With electrical length θ；
Scheme as a further improvement, the arc-shaped micro-strip line, which is set as semicircle microstrip line, makes entire coupling circuit
Structure is in symmetrical structure, so as to reduce processing and measurement error；
Scheme as a further improvement, the pipe nipple impedance line are the impedance-compensated line of matching network, pass through adjusting
Its impedance and so that harmonic controling network is reached best match.
Compared with prior art, the utility model has the following beneficial effects:
1, the utility model is using annular filter matching network is coupled, can be realized wider impedance matching freedom degree and compared with
Low power loss；
2, the utility model controls higher hamonic wave using coupling filtering mating structure, can be improved power amplification efficiency；
3, the utility model is enormously simplified structure and technique, is avoided simultaneously using coupling loop filtering mating structure
The series-parallel mating structure of open stub and closed stub helps to reduce error.
Detailed description of the invention
Fig. 1 is a kind of topological structure schematic diagram of the F class power amplifier based on coupling loop resonant network of the utility model.
Fig. 2 is coupling loop resonant network schematic diagram in the utility model.
Fig. 3 is the equivalent segmentation schematic diagram of front and back two parts of coupled resonance network in the utility model, and wherein the left side is the
A part, the right are second part.
Fig. 4 is schematic diagram of the Tu3Zhong first part circuit resonance network in odd mould excitation state.
Fig. 5 is schematic diagram of the Tu3Zhong first part circuit resonance network in even mould excitation state.
Fig. 6 is the schematic diagram that second part circuit resonance network motivates state in odd mould in Fig. 3.
Fig. 7 is the schematic diagram that second part circuit resonance network motivates state in even mould in Fig. 3.
Fig. 8 is the S parameter simulation result schematic diagram to the utility model coupling loop filter.
Fig. 9 is the simulation result diagram of the utility model power amplifier.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
In view of the defects existing in the prior art, applicant deeply grinds the structure of existing F power-like amplifier
Study carefully, the general series-parallel realization second harmonic short circuit three for all using stub of the traditional harmonic controling structure of discovery F class power amplifier
Subharmonic open circuit, and since triple-frequency harmonics is arrived in the complexity of circuit general control.
In order to realize that wide bandwidth is efficient simultaneously, the utility model proposes a kind of novel harmonic controling networks, realize
Control to higher hamonic wave, realizes high efficiency while broadened bandwidth.
Referring to Fig. 1, it is shown the structural block diagram of F class power amplifier of the utility model based on coupling loop resonant network, at least
Including input matching network, power amplifier unit, harmonic controling network and fundamental wave match circuit, wherein power amplifier unit includes at least
Gate bias network, drain electrode biasing networks and power discharging transistor.
Harmonic controling network is connected with the output end of power amplifier unit, and the power signal for exporting power amplifier unit carries out
Harmonic controling is simultaneously exported through fundamental wave match circuit to load.
Referring to fig. 2, it is shown the circuit diagram of the utility model harmonic controling network, electricity is realized by coupling filter
The matching on road.It couples filter matching network and includes at least the first microstrip line TL1, the second microstrip line TL2, the first parallel coupled line
CLin1, the second parallel coupled line CLin2, the first loop wire Curve1, the second loop wire Curve2, third loop wire Curve3
With Fourth Ring route Curve4, described one end first microstrip line TL1 is connected with the output of power amplifier unit, the other end and described
The first input end and the second input terminal of first parallel coupled line CLin1 is connected, and the first of the first parallel coupled line CLin1
Output end is connected with one end of the first loop wire Curve1, the second output terminal of the first parallel coupled line CLin1
It is connected with one end of the third loop wire Curve3；One end of the second microstrip line TL2 is as output end and the fundamental wave
Match circuit is connected, and the other end is connected with the first output end of the second parallel coupled line CLin2 and second output terminal
It connects, the first input end of the second parallel coupled line CLin2 is connected with one end of the second loop wire Curve2, institute
The second input terminal for stating the second parallel coupled line CLin2 is connected with one end of the Fourth Ring route Curve4；First ring
The other end of route Curve1 is connected with the other end of the second loop wire Curve2, the third loop wire Curve3
The other end be connected with one end of the Fourth Ring route Curve4.
Above structure is symmetrical coupled structure, so symmetrical structure network equivalent can be split into for simplifying the analysis
Two parts network as described in Figure 3, wherein the left side is first part, and the right is second part, and is carried out respectively to each section
Even and odd mode analysis.
When under first part's idol mould excitation state as shown in figure 4, its equivalent impedance expression formula is as follows:
When under first part's surprise mould excitation state as shown in figure 5, its equivalent impedance Zino1It is shown below:
When under second part idol mould excitation state as shown in fig. 6, its equivalent impedance Zine2It is as shown below:
When under second part surprise mould excitation state as shown in fig. 7, its equivalent impedance Zino2It is shown below:
Then the even mould and Qi Mo scattering parameter of the symmetrical structure filter proposed can calculate down:
Symmetrical two sections of port filter networks scattering parameter can be calculated as follows:
So the externals stray parameter expression of its network structure can be expressed as follows:
For ideal bandpass filter, meet S in working frequency range domestic demand21=0 condition, therefore according to this condition and tie
Formula is closed, following formula: Z can be obtainedine-Zino=0 final equation comprising characteristic impedance and electrical length are as follows:
Therefore we can by calculating and analyzing the externals stray parameter (including impedance and electrical length) of this filter,
Filter performance parameters in working frequency range are determined by formula.Fig. 8 is the S parameter of the output matched filter, You Tuke
Know, is a transmission zero at 1.3GHz, 2.6GHz, 3.9GHz frequency point in passband.The filter it can be seen from S parameter
Being suppressed to -20dB, be suppressed to -15dB to triple-frequency harmonics to second harmonic, is demonstrated by good filtering characteristic.
The harmonic controling principle is further detailed below:
For the even-order harmonic impedance matching, its harmonic wave input impedance Z as shown in Figure 3in1It can indicate are as follows:
Wherein Zine1It is microstrip line Z1、Z2e、Z3The even mode impedance of first part's loop structure is as shown in Fig. 4, f2nIt indicates
It is (4n-2) subharmonic, foIt is fundamental wave.Then by formula it is found that its input impedance harmonic wave be 2,6,10,, be for 4n-2 times zero,
It is achieved that the short circuit to above-mentioned each harmonic impedance.
Likewise, passing through microstrip line Z as shown in Figure 31、Z3e、Z4The harmonic impedance expression formula of the second part structure of composition
Are as follows:
Wherein Zine2Microstrip line Z1、Z3e、Z4The coupled impedance of composed structure network, so known by formula (12) and (13),
The effect to all even-order harmonic impedance short circuits may be implemented under even mould excitation state.
For the odd harmonic impedance matching, such as its harmonic wave input impedance of Fig. 3 Zin3It can indicate are as follows:
Wherein, Zino1It is microstrip line Z1、Z2oOdd mould excitation in the case of impedance as shown in figure 5, f3nWhat is indicated is 3n times
Harmonic wave, foIt is fundamental wave.By formula it is found that its harmonic wave input impedance harmonic wave be 3,9,15 ... 3n times is zero, it is achieved that
It opens a way to above-mentioned higher hamonic wave.
Likewise, the microstrip line Z under odd mould excitation state as shown in Figure 31、Z3oThe harmonic match realized can indicate
Are as follows:
Wherein Zino2It is microstrip line Z1、Z3oImpedance under the excitation of odd mould is as shown in fig. 7, so by formula it is found that in surprise
Under mould excitation state, work as f5=5f0When, i.e., it is infinity relative to the impedance of quintuple harmonics, realizes the control to quintuple harmonics
System.
In conclusion passing through microstrip line TL1, TL2, coupling line Clin1, Clin2, loop microstrip line in the design
Multiple even-order harmonic and multiple may be implemented in the harmonic match network of Curve1, Curve2, Curve3, Curve4 composition
The control of odd harmonic, this reduces harmonic wave to the dissipation degree of power, to improve efficiency to a certain degree.As shown in figure 9,
Power is realized in the bandwidth of 1.6GHz-3.2GHz is greater than 64.17% greater than 40dBm efficiency.
The relatively existing technology of the utility model is passed through by the matching process of the series-parallel microstrip line of improvement tradition as a result,
The circuit topological structure of loop coupling, realizes the control to multiple even-order harmonic and multiple odd harmonic, reduces harmonic wave pair
The dissipation of power, in the efficiency for improving power amplifier to a certain degree, while this also contributes to further widening power amplifier bandwidth.
The method and its core concept of the above embodiments are only used to help understand the utility model.It should refer to
It out, for those skilled in the art, without departing from the principle of this utility model, can also be to this
Some improvement and modification can also be carried out for utility model, these improvement and modification also fall into the protection scope of the utility model claims
It is interior.Various modifications to these embodiments are it will be apparent that determining in the application for those skilled in the art
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to these embodiments shown in the application, and is to fit to and the disclosure as set forth herein
Principle and the consistent widest scope of features of novelty.
Claims (8)
1. a kind of F power-like amplifier based on coupling loop resonant network, which is characterized in that include at least input pair net
Network, power amplifier unit, harmonic controling network and fundamental wave match circuit, wherein the harmonic controling network and power amplifier unit it is defeated
Outlet is connected, and the power signal for exporting power amplifier unit carries out harmonic controling and exports through fundamental wave match circuit to negative
It carries；
The harmonic controling network is coupling filter matching network, includes at least the first microstrip line TL1, the second microstrip line TL2, the
One parallel coupled line CLin1, the second parallel coupled line CLin2, the first loop wire Curve1, the second loop wire Curve2, third
Loop wire Curve3 and Fourth Ring route Curve4, described one end first microstrip line TL1 are connected with the output of power amplifier unit, another
One end is connected with the first input end of the first parallel coupled line CLin1 and the second input terminal, first parallel coupling
The first output end of line CLin1 is connected with one end of the first loop wire Curve1, the first parallel coupled line CLin1
Second output terminal be connected with one end of the third loop wire Curve3；One end of the second microstrip line TL2 is as output
End is connected with the fundamental wave match circuit, the first output end of the other end and the second parallel coupled line CLin2 and the
Two output ends are connected, and the one of the first input end of the second parallel coupled line CLin2 and the second loop wire Curve2
End is connected, and the second input terminal of the second parallel coupled line CLin2 is connected with one end of the Fourth Ring route Curve4；
The other end of the first loop wire Curve1 is connected with the other end of the second loop wire Curve2, the third loop
The other end of line Curve3 is connected with one end of the Fourth Ring route Curve4.
2. the F power-like amplifier according to claim 1 based on coupling loop resonant network, which is characterized in that described
Coupling line sets coefficient of coup C and electrical length θ according to the frequency of power amplifier in harmonic controling network.
3. the F power-like amplifier according to claim 1 or 2 based on coupling loop resonant network, which is characterized in that institute
It states the first loop wire Curve1 and the second loop wire Curve2 is set as semicircle microstrip line；Third loop wire Curve3 and the 4th
Loop wire Curve4 is set as semicircle microstrip line.
4. the F power-like amplifier according to claim 1 or 2 based on coupling loop resonant network, which is characterized in that institute
Stating the first microstrip line TL1 and the second microstrip line TL2 is impedance-compensated line, reaches harmonic controling network most by adjusting its impedance
Good matching.
5. the F power-like amplifier according to claim 1 or 2 based on coupling loop resonant network, which is characterized in that institute
The harmonic controling network stated is used to make the voltage of output signal in square wave and electric current in half-sine wave, while even-order harmonic impedance is
Zero, odd harmonic impedance is infinity.
6. the F power-like amplifier according to claim 1 or 2 based on coupling loop resonant network, which is characterized in that institute
Power amplifier unit is stated including at least gate bias network, drain electrode biasing networks and power discharging transistor.
7. the F power-like amplifier according to claim 6 based on coupling loop resonant network, which is characterized in that
The input matching network for realizing circuit input impedance and power discharging transistor source impedance realize conjugate impedance match with
Reach the input of maximum power.
8. the F power-like amplifier according to claim 6 based on coupling loop resonant network, which is characterized in that
The gate bias circuit provides stable ﹣ 2.8V voltage for grid source, and the drain electrode biasing circuit provides 28V's for drain-source
Burning voltage.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639243A (en) * | 2019-01-10 | 2019-04-16 | 杭州电子科技大学 | A kind of F power-like amplifier based on coupling loop resonant network |
| CN110620558A (en) * | 2019-09-16 | 2019-12-27 | 厦门市三安集成电路有限公司 | Microwave generation system, method and wireless communication equipment |
-
2019
- 2019-01-10 CN CN201920042744.8U patent/CN209283190U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639243A (en) * | 2019-01-10 | 2019-04-16 | 杭州电子科技大学 | A kind of F power-like amplifier based on coupling loop resonant network |
| CN110620558A (en) * | 2019-09-16 | 2019-12-27 | 厦门市三安集成电路有限公司 | Microwave generation system, method and wireless communication equipment |
| CN110620558B (en) * | 2019-09-16 | 2023-03-28 | 厦门市三安集成电路有限公司 | Microwave generation system, method and wireless communication equipment |
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