CN103560758B - A kind of power amplifier for polar coordinate transmitter - Google Patents
A kind of power amplifier for polar coordinate transmitter Download PDFInfo
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- CN103560758B CN103560758B CN201310568552.8A CN201310568552A CN103560758B CN 103560758 B CN103560758 B CN 103560758B CN 201310568552 A CN201310568552 A CN 201310568552A CN 103560758 B CN103560758 B CN 103560758B
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Abstract
The invention discloses a kind of power amplifier for polar coordinate transmitter, it is characterised in that comprise the first power tube, adder and at least two harmonic injection unit；The output of the first power tube is connected with the first input end of adder；Harmonic injection unit comprises defect ground, the power tube being sequentially connected with and shifts to unit；The input of the output and adder of shifting to unit is connected.Comprise to defect microstrip line and infull dumbbell structure；Microstrip line is arranged on the middle part of infull dumbbell structure.The present invention uses DGS structure harmonic against F class power amplifier, is possible not only to bigger extended amplitude modulation bandwidth, reduces amplitude amplification channel and can cause distorted signals, can also simplify internal circuit configuration simultaneously, makes to realize polar coordinate transmitter miniaturization and is possibly realized.
Description
Technical field
The present invention relates to the power amplifier of microwave circuit, be specifically related to a kind of power amplification for polar coordinate transmitter
Device.
Background technology
Polar coordinate transmitter is a kind of high efficiency trasmitters structure, and contributes to realizing the mesh of digital flexible emitter
Mark.Polar coordinate transmitter is different from rectangular co-ordinate emitter, needs to be converted into rectangular co-ordinate information I/Q polar coordinates ρ/θ information
Rear being amplified respectively, the signal finally remerging coordinate at a right angle modulation is launched.The odds for effectiveness of polar coordinate transmitter embodies
High efficiency power amplifier can be used at it.Therefore high-performance, miniaturization polar coordinate transmitter are studied and had important showing
Sincere justice.
In prior art, polar coordinate transmitter generally uses some E class close power amplifier structures, improves the effect of whole emitter
Rate.Such as, the output of E class power amplifier adds resonant element and the control method such as drain voltage and electric current is used, but these methods
Cannot extended amplitude modulation bandwidth, the amplitude amplification channel of Bandwidth-Constrained can cause distorted signals.Due to pulse-modulator
Higher over-sampling rate, the signal frequency and the bandwidth that enter into power supply modulator all can be the highest, owing to the frequency of close power amplifier is rung
Answering limited bandwidth, it is extremely difficult for will keeping higher average efficiency in this case.Along with communication system is to polar coordinates
The linearisation of emitter and the continuous requirement of miniaturization, carry out high efficiency merit from internal structure starts with raising polar coordinate transmitter
The research put just seems extremely important.
Summary of the invention
It is an object of the invention to provide a kind of power amplifier for polar coordinate transmitter, use defect ground structure
(defected ground structure, DGS) harmonic, against F class power amplifier, is possible not only to bigger extended amplitude modulation band
Width, reduces amplitude amplification channel and can cause distorted signals, can also simplify internal circuit configuration simultaneously, make to realize polar coordinate transmitter
Miniaturization is possibly realized.
In order to achieve the above object, the present invention is achieved through the following technical solutions: a kind of merit for polar coordinate transmitter
Rate amplifier, this polar coordinate transmitter comprises baseband signal generation module, width is separated module, modulator, delay cell, switch
Power supply modulator, phase modulation unit, amplitude modulation unit and power amplifier, the output of baseband signal generation module and width
The input of the module that is separated connects, and the be separated two-way output of module of width connects input and the delay cell of modulator respectively
Input, the input of the output connecting valve power supply modulator of modulator, the output of Switching Power Supply modulator and width
The input of degree modulating unit connects, and the output of delay cell is connected with the input of phase modulation unit, amplitude modulation(PAM) list
The output of unit and the output of phase modulation unit are connected with first input end and second input of power amplifier respectively,
Being characterized in, this power amplifier comprises: the first power tube, adder and at least two harmonic injection unit；
The above-mentioned output of the first power tube is connected with the first input end of adder；
Above-mentioned harmonic injection unit comprises defect ground, the power tube being sequentially connected with and shifts to unit；
The input of the above-mentioned output and adder of shifting to unit is connected.
Above-mentioned defect ground comprises microstrip line and infull dumbbell structure；
Above-mentioned microstrip line is arranged on the middle part of infull dumbbell structure.
One of them above-mentioned harmonic injection unit injects second harmonic.
Above-mentioned other in which harmonic injection unit injects triple-frequency harmonics.
Above-mentioned infull dumbbell structure comprises symmetrically arranged rectangle frame and the middle connection being arranged between two rectangle frames
Body.
Above-mentioned rectangle frame is provided with opening.
The present invention compared with prior art has the advantage that the present invention extends the amplitude modulation(PAM) band of polar coordinate transmitter
Width, thus improve the distortion of range signal；Inverse F class power amplifier is realized, it is to avoid complicated circuit knot by DGS harmonic structure
Structure, obtains the power added efficiency of maximum by the radio-frequency voltage and current waveform optimizing fundamental frequency, and adjustable range is wider, at electricity
Road debugging in more convenient, maintain the high efficiency of power amplifier, can improve the waveform of output signal, power output capacity and
Upper operational frequency limit；By designing the internal structures such as length l and the width w of full dumbbell shape DGS structure, it is achieved have not
With harmonic wave frequency-selective network, structural circuit is simple, be prone to processing, cost is relatively low.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of a kind of power amplifier for polar coordinate transmitter of the present invention.
Fig. 2 is the overall structure schematic diagram on defect of the present invention ground.
Fig. 3 is the front view on defect of the present invention ground.
Fig. 4 is the rearview on defect of the present invention ground.
Fig. 5 is the overall structure schematic diagram of emitter.
Detailed description of the invention
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
As it is shown in figure 1, a kind of power amplifier for polar coordinate transmitter, this polar coordinate transmitter comprises baseband signal
Generation module, width are separated module, modulator, delay cell, Switching Power Supply modulator, phase modulation unit, amplitude modulation(PAM) list
Unit and power amplifier, be separated with the width input of module of the output of baseband signal generation module is connected, and width is separated mould
The two-way output of block connects the input of modulator and the input of delay cell respectively, the output connecting valve electricity of modulator
The input of modulator of source, the output of Switching Power Supply modulator is connected with the input of amplitude modulation unit, delay cell
Output is connected with the input of phase modulation unit, and the output of amplitude modulation unit and the output of phase modulation unit divide
Not being connected with first input end and second input of power amplifier, this power amplifier comprises: the first power tube 1, addition
Device 2 and at least two harmonic injection unit；The output of the first power tube 1 is connected with the first input end of adder 2；Harmonic wave is noted
Enter unit comprise defect ground 31, the power tube 32 being sequentially connected with and shift to unit 33；Shift to output and the adder 2 of unit 33
Input connect.
As shown in Figure 2, Figure 3, Figure 4, defect ground 31 comprises microstrip line 311 and infull dumbbell structure 312；Microstrip line 311 sets
Put the middle part at infull dumbbell structure 312.One of them harmonic injection unit injects second harmonic.Other in which harmonic wave
Injection unit injects triple-frequency harmonics.Power amplifier as claimed in claim 2, it is characterised in that described infull dumbbell knot
Structure 312 comprises symmetrically arranged rectangle frame 3121 and the intermediate connector 3122 being arranged between two rectangle frames.Due to this dumbbell
Structure is the most all closed, by length and the width of regulation rectangle frame 3121, it is possible to obtain required harmonic component.Rectangle frame 3121 sets
There is opening.
Concrete application: use novel reverse F class power amplifier structure, it is achieved the amplitude modulation(PAM) bandwidth expansion of polar coordinate transmitter, change
The nonlinear problem of kind power amplifier drain modulation, range signal amplifies the non-linear distortion with recovery process；From novel reverse F class power amplifier
Starting with in inside, uses defect ground 31 harmonic circuit, design novel inverse F class power amplifier.Common inverse F class is come by passive network
Control harmonic component, arrive regulation electric current and the purpose of voltage waveform.Inject secondary and triple-frequency harmonics aliquot, be injected into power
The output port of amplifier reaches to regulate electric current and the purpose of voltage waveform.The infull dumbbell structure 312 at the back side has three segment length
Being respectively l1, l2 and l3, width is w.Relative dielectric constant is, by the length and width on regulation defect ground 31, make up and down
The when that two rectangular areas increasing, equivalent capacitance value can be affected, and then affects the frequency response of whole circuit.In like manner,
When the width of increase intermediate rectangular, the area of intermediate rectangular increases, and the frequency response of circuit also can change.By the most former
Reason, can realize controlling the effect of harmonic component.The main method of regulation resonant frequency is the perimeter L of regulation resonant ring, i.e. l1,
L2 and l3 sum.These defect ground 31 resonant frequencies can be obtained by (1) formula
(1)
In formula, c is the light velocity, and L is the girth of resonant ring,For relative dielectric constant.From above formula, when perimeter L increases
Time, resonant frequency reduces.Therefore, when width w increases, it is meant that resonant element girth increases, the resonant frequency of generation reduces,
Meanwhile the coupling electric capacity between resonant element and metal ground also will increase, thus reduce resonant frequency further.
Result is obtained, when passband central frequency is about 4.1GHz, and medium substrate all uses Rogers by electromagnetic-field simulation
RT/Duroid 5880 medium, dielectric constant 2.2, thickness is 0.254mm.According to analysis above, parameter l1, l2, l3 and w
Select to need to take into account the requirement of loss and processing technology, obtain l1=7mm, l2=7mm, l3=18mm, width w the most here
More sensitive, the widest resonant frequency fc of w is the lowest, by simulation calculation, selects w=3.2mm.
By using the defect ground 31 shown in Fig. 2 to realize harmonic injection technology, it is achieved novel reverse F class power amplifier structure such as figure
Shown in 1.Being sampled by directional coupler of input signal in the method, as shown in Figure 2, is tied by adjusting the full dumbbell in the back side
The length and width of structure 312, it is achieved the secondary of input signal and triple-frequency harmonics extract, finally injects with suitable phase place and closes
Become.Here power tube 32 uses the LDMOS device MRF21010 model of Freescale company to be designed, this device energy
Enough meeting Vdmax and fmax that design is wanted, it is-0.5 ~ 65V that its drain-source bears voltage range, gate source voltage is-0.5 ~
15V.The power added efficiency of maximum is obtained by the radio-frequency voltage and current waveform optimizing fundamental frequency.
Phase-modulated signal amplifies and recovers with range signal, it is common that realized by E class Switch power amplifier.But
When the recovery of range signal is to be realized by the drain modulation of E class close power amplifier, amplitude modulation(PAM) dynamic range and power amplifier are average
Efficiency and the amplitude modulation(PAM) linearity cannot ensure.According to Fig. 5, I/Q rectangular co-ordinate information is converted into polar coordinates by the program
Being amplified respectively after ρ/θ information, the signal finally remerging coordinate at a right angle modulation is launched.This polar coordinate transmitter can divide
Becoming four parts: width phase signals separates, phase signal modulation and up-conversion, range signal amplifies, and phase signal amplifies and amplitude
Modulated signal is recovered.Here the extraction of amplitude and phase information is by obtaining the nonlinear transformation of I/Q data, amplitude arteries and veins
Modulated uses Deltasigma modulator, and the recovery of range signal is that the drain modulation by close power amplifier realizes.Use this
Novel defect ground 31 realizes inverse F class power amplifier, makes the finite bandwidth of amplitude amplification channel be expanded, and improves amplitude modulation(PAM) and produces
Raw distortion.Supply voltage and the amplitude-phase non-linear conversion of output signal when also controlling drain modulation simultaneously, thus improve
The properties of whole polar coordinate transmitter.
The range of choice that the relative dielectric constant of medium substrate is general is:Between=2 ~ 3, meanwhile, loss angle tangent should be use up
Measure little, typically take≤10-3；Owing to inverse F class power amplifier harmonic wave operates mainly in about 4-9GHz, the biggestValue also may be used
With.The selection principal security oscillator performance of dielectric-slab thickness h, consideration simultaneously is easy to integrated with other circuit, and taking h is 0.2mm
Left and right.
Defect ground 31 port Impedance carry out matching optimization design together with inverse F class output port, and its characteristic impedance can root
Need to be 50 according to designOr other resistance value.
Although present disclosure has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read foregoing, for the present invention's
Multiple amendment and replacement all will be apparent from.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (6)
1., for a power amplifier for polar coordinate transmitter, this polar coordinate transmitter comprises baseband signal generation module, width
Be separated module, modulator, delay cell, Switching Power Supply modulator, phase modulation unit, amplitude modulation unit and power amplification
Device, be separated with the width input of module of the output of baseband signal generation module is connected, and width is separated the two-way output of module
Connect the input of modulator and the input of delay cell respectively, the output connecting valve power supply modulator of modulator defeated
Entering end, the output of Switching Power Supply modulator is connected with the input of amplitude modulation unit, the output of delay cell and phase place
The input of modulating unit connects, the output of amplitude modulation unit and the output of phase modulation unit respectively with power amplification
The first input end of device and the second input connect, it is characterised in that this power amplifier comprises: the first power tube (1), addition
Device (2) and at least two harmonic injection unit；
The output of described the first power tube (1) is connected with the first input end of adder (2)；
Each described harmonic injection unit with comprising the defect that is sequentially connected with (31), power tube (32) and shift to unit (33)；
Each described output shifting to unit (33) of harmonic injection unit is connected with the input of adder (2).
2. power amplifier as claimed in claim 1, it is characterised in that described defect ground (31) comprises microstrip line (311)
And full dumbbell structure (312)；
Described microstrip line (311) is arranged on the middle part of infull dumbbell structure (312).
3. power amplifier as claimed in claim 1, it is characterised in that one of them described harmonic injection unit injects two
Subharmonic.
4. power amplifier as claimed in claim 3, it is characterised in that described other in which harmonic injection unit injects
Triple-frequency harmonics.
5. power amplifier as claimed in claim 2, it is characterised in that described infull dumbbell structure (312) comprises symmetry
The rectangle frame (3121) arranged and the intermediate connector (3122) being arranged between two rectangle frames.
6. power amplifier as claimed in claim 5, it is characterised in that described rectangle frame (3121) is provided with opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310568552.8A CN103560758B (en) | 2013-11-15 | 2013-11-15 | A kind of power amplifier for polar coordinate transmitter |
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| CN201310568552.8A CN103560758B (en) | 2013-11-15 | 2013-11-15 | A kind of power amplifier for polar coordinate transmitter |
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| CN103560758A CN103560758A (en) | 2014-02-05 |
| CN103560758B true CN103560758B (en) | 2016-09-07 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3255791B1 (en) * | 2015-03-24 | 2019-03-06 | Huawei Technologies Co., Ltd. | Power amplifying equipment |
| CN104808738B (en) * | 2015-04-24 | 2017-03-22 | 昆腾微电子股份有限公司 | Amplitude modulation circuit, signal emission circuit and card reader |
| CN108206674B (en) * | 2016-12-19 | 2021-10-29 | 中国科学院苏州纳米技术与纳米仿生研究所 | Doherty amplifier with defected ground structure |
| CN106849880A (en) * | 2016-12-29 | 2017-06-13 | 中国电子科技集团公司第五十研究所 | Efficient linear digital radio frequency power signal generating method based on polar coordinates treatment |
Citations (3)
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| CN101167325A (en) * | 2005-04-27 | 2008-04-23 | 松下电器产业株式会社 | Polar modulation transmitter circuit and communications device |
| CN102291154A (en) * | 2011-09-23 | 2011-12-21 | 电子科技大学 | Polar coordinate transmitter |
| CN103078820A (en) * | 2012-11-21 | 2013-05-01 | 交通运输部公路科学研究所 | Efficient directional wireless communication method |
Family Cites Families (2)
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|---|---|---|---|---|
| EP1557995A3 (en) * | 2004-01-22 | 2012-10-17 | Panasonic Corporation | Data converter and data conversion method, and transmitter circuit, communications device and electronic device using the same |
| CN100576740C (en) * | 2004-03-10 | 2009-12-30 | 松下电器产业株式会社 | Data converter device and data transfer device and transmitter circuitry thereof, communicator and electronic installation |
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|---|---|---|---|---|
| CN101167325A (en) * | 2005-04-27 | 2008-04-23 | 松下电器产业株式会社 | Polar modulation transmitter circuit and communications device |
| CN102291154A (en) * | 2011-09-23 | 2011-12-21 | 电子科技大学 | Polar coordinate transmitter |
| CN103078820A (en) * | 2012-11-21 | 2013-05-01 | 交通运输部公路科学研究所 | Efficient directional wireless communication method |
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| E类功率放大器研究;游飞;《中国博士学位论文全文数据库信息科技辑 》;20110515(第5期);全文 * |
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