CN101834572A - Broadband radio-frequency combining power amplifier - Google Patents

Abstract

The invention relates to a broadband radio-frequency combining power amplifier, belonging to the technical field of radio-frequency circuits. The broadband radio-frequency combining power amplifier comprises an amplifier comprising N-numbered amplifier units, and is characterized by also comprising a power combiner and a power divider, wherein the power combiner is formed by cascading K-numbered quarter-wave 3dB quadrature bridges and K -numbered loads in M stages, and the power divider is formed by cascading K-numbered Wilkinson in-phase broadband 2-way dividers and K-numbered 90 degree phase shifters in M stages, wherein M is a positive integer, N is equal to 2M, and K is equal to 2M minus 1. The whole amplifier of the invention has the characteristics of wide working bandwidth, small volume, high efficiency, easy realization and good replicability.

Description

Broadband radio-frequency combining power amplifier

Technical field

The invention belongs to the radio circuit technical field, particularly to distributing the improvement of synthetic technology.

Background technology

Usually need use high-power radio-frequency power amplifier in communication, broadcasting, radar, industrial processes, Medical Instruments and scientific research field.Because its power grade height, single power amplifying device is difficult to satisfy the requirement of fan-out capability, generally adopts combining power amplifier (hereinafter to be referred as the synthesis type power amplifier); The synthesis type power amplifier comprises three parts: power divider, and amplifier, power combiner, as shown in Figure 1; Wherein power divider is assigned to the radio-frequency power of input on N the branch road; The output of each branch road of distributor is connected with the input of an amplifier unit, the output of N amplifier unit all is connected with the input of power combiner, the power output grade of each amplifier unit is not high relatively, be made as P, the power addition of synthesizer after amplify on the N road the most at last, obtain the gross power power output of N*P, N is a positive integer.

Along with the growth (as digital TV, the 3G mobile communication) with new business of widening of applying frequency scope, more and more higher to the bandwidth demand of power amplifier.The final bandwidth of synthesis type power amplifier depends on the bandwidth of above-mentioned three parts.

At present, for the relative not high amplifier unit (as the single tube amplifier) of power grade,, can obtain a available bandwidth to several octaves by load traction (Load Pull) technology and network synthesis, Computer Simulation optimization means.So in combining power amplifier, the broadband key that is designed to of distributor and synthesizer.In the conventional design, distributor and synthesizer are identity unit, and structure is symmetry fully, and promptly distributor is as the port of output, and synthesizer is as the port of input, and vice versa.

Distribution synthetic schemes commonly used generally has two kinds: first kind is orthogonal scheme, as shown in Figure 2, wherein, Fig. 2 (a) is the structure of two-way quadrature combining power amplifier, its distributor and synthesizer all are to adopt quarter-wave 3dB quadrature bridge, radio-frequency power is divided into the two-way that power equates by input 21 inputs of distributor through quadrature bridge, delivers to the output port 22 and 23 of distributor respectively.The output signal of its middle port 22 equates with the input signal phase place, is called homophase output; The output signal ratio port 21 of port 23 falls behind 90 degree, is called quadrature output.After the two-way output signal of distributor is amplified through two identical amplifier units, be input to the input port 25 and 26 of synthesizer, finally realize two-way power sum at the delivery outlet 27 of synthesizer.Port 27 to 25 phase lags 90 degree are with 26 homophases.Distributor and synthesizer respectively have an absorbing load 24 and 28.

Fig. 2 (b) is based on the N (N=2 that the two-way combining amplifier is realized ^M) road combining amplifier structure.Distributor (synthesizer) is by M level totally 2 ^M-1 3dB quadrature bridge constitutes, and finally forms N branch road, and M is a positive integer.

Second kind is the homophase scheme, adopts Wilkinson type two distributors and synthesizer, as shown in Figure 3, among the figure, distributor comprises two sections 70.7 ohm quarter-wave transmission line, and their end tandems are in the input port 31, and the other end 321 and 331 is respectively as the output of distributor.34 cross-over connections of 100 ohm balanced resistance are between two output ports.Input power enters dispenser port 31, and the power output that is assigned to port 321 and 331, two ports equates that phase place is identical.After the power output of distributor is amplified through the identical amplifier unit of two-way, again by synthesizer with the addition of two-way power after by port 35 outputs.The synthesizer principle is identical with distributor.Equally, by the cascade of M level, 2 road synthesis type power amplifiers can be expanded to N (N=2 ^M) road.

Above-mentioned orthogonal scheme and homophase scheme all can not satisfy the requirement of broadband power amplifier, mainly show:

The amplitude balance degree of each branch road of quadrature distribution synthesizer worsens rapidly with the increase of frequency band and cascade progression M, causes the power load of amplifier unit to have than big difference, the utilization ratio of step-down amplifier unit, and the loss of increase power building-up process.For example, the power splitting of quarter-wave 3dB quadrature bridge such as Fig. 4, among the figure, curve 41 is 0 degree output signal, curve 42 is 90 degree output signals; In an octave, the two-way amplitude output signal differs 0.6dB.If the two-stage electric bridge is cascaded as quadruple distributor (being M=2), then four the tunnel distribute the difference power between the output to be 1.2dB to the maximum; When M=3, this imbalance can reach 1.8dB.The quadrature synthesizer has same problem.So the amplitude balance degree is the subject matter of restriction orthogonal type synthesis type amplifier bandwidth.

Above-mentioned homophase distributor and synthesizer structure are because symmetrical fully, and ideal situation amplitude between (at least one octave) each tributary port in very wide bandwidth is in full accord, and there is not bandwidth constraints in the amplitude balance degree.But the isolation smaller bandwidth between each port reflection loss and two tributary ports, usually, quarter-wave Wilkinson type network, its port reflection loss is not more than 37% less than the relative bandwidth of-20dB, isolation is not more than 37% greater than the relative bandwidth of 20dB, as shown in Figure 5, and wherein, (a) be port reflection loss curve, (b) be the isolation curve.As seen the narrow-band characteristic of reflection loss and isolation has limited the bandwidth of homophase synthesis type power amplifier.

The scheme of existing spread bandwidth is that synthesizer all adopts the quarter-wave structure of identical more piece with distributor, as shown in Figure 6; Wherein Fig. 6 (a) is the broadband 3dB quadrature bridge structure that three sections quarter-wave coupling lines are formed, and it comprises one section close coupling line 61 and two sections weak coupling lines 62 that link to each other with 61 respectively and 63.The amplitude balance degree is less than 0.1dB in an octave.The characteristic of the weak coupling transmission line in this model is very responsive to structural parameters (as the spacing between transmission line width and transmission line), and then influences the final response of whole electric bridge, and therefore the realizability and the rate of finished products of this scheme are all undesirable in actual applications.

Fig. 6 (b) be two joint quarter-wave Wilkinson (Wilkinson) devices as two distributors and two composite structures, it comprises two pairs of quarter-wave impedance variation lines 64 and 65, their cascades together.Each is to balance resistance 66 of impedance conversion line cross-over connection and 67.Its-20dB reflection loss bandwidth reaches 94%, and isolation is greater than 20dB in this bandwidth.The bandwidth wideer as needs can increase the joint number to 3 of quatrter-wavelength line, 4,5 or the like.

Though above-mentioned broadband measure has solved the bandwidth problem of amplitude balance degree, reflection loss and isolation, owing to adopt more piece quarter-wave structure, cause its loss to increase, can reduce the overall efficiency of power amplifier during as power combiner.In addition, the power load of synthesizer is bigger, and high loss meeting causes heating, increases the difficulty of thermal design.The selected transmission line volume of high-power synthesizer is generally bigger, and multi-section structure can further strengthen its space hold, realizes that difficulty is bigger.So this broadband scheme is not suitable for high-power broadband synthesizer.

Summary of the invention

The objective of the invention is for overcoming the deficiency of distributor and synthesizer in the existing combining power amplifier, a kind of broadband radio-frequency combining power amplifier is proposed, by setting up amplitude balance degree and the final theoretical model that synthesizes loss, find a kind of distribution synthetic schemes of optimization, promptly distributor adopts different structures with synthesizer, makes the whole amplifier work zone wide, and it is little to have a volume, the efficient height, and realize the characteristics that replicability is good easily.

The broadband radio-frequency combining power amplifier that the present invention proposes, comprise the amplifier that N amplifier unit constitutes, it is characterized in that, also comprise by K quarter-wave 3dB quadrature bridge and K power combiner and K Wilkinson homophase broadband two distributors and K 90 ° of power dividers that phase shifter constitutes by the cascade of M level that load forms by the cascade of M level; M is a positive integer, N=2 ^M, K=2 ^M-1; Its annexation is: one in two phase output terminal mouths such as constant amplitude of the first order two distributors directly links to each other with the input of partial one two distributor, another output port links to each other with the input of partial another two distributor by 90 ° of phase shifters, and the like; One in two phase output terminal mouths such as constant amplitude of two distributors of M level directly links to each other with the input of amplifier unit, another output port links to each other with the input of amplifier unit by 90 ° of phase shifters, the output of N amplifier unit links to each other with two inputs of the quarter-wave 3dB electric bridge of N/2 M level respectively, an output of each quarter-wave 3dB electric bridge of M level links to each other with load, another output while of two adjacent quarter-wave 3dB electric bridges links to each other with two inputs of a quarter-wave 3dB electric bridge of M-1 level, and the rest may be inferred; The input port of the first order two distributors is the total input of power divider, and a delivery outlet of first order quadrature bridge is the final radio frequency output of synthesis type power amplifier, and another delivery outlet links to each other with load.

Beneficial effect of the present invention:

The present invention proposes the relation of synthetic loss of broadband combining power amplifier and distribution, the comprise network degree of balance, according to this theoretical direction, and then a kind of synthetic allocative decision proposed, be that distributor adopts different structures with synthesizer, and adopt the distributor of Wilkinson molded breadth band balance to combine with phase shifter, combine with unbalanced comprise network again, can realize the bandwidth that an octave is above.Because Wilkinson molded breadth Tape dispensers is not high to the structural parameters susceptibility, this scheme realizes easily, the rate of finished products height.

Description of drawings

Fig. 1 is general synthesis type power amplifier theory diagram.

Fig. 2 is the existing synthesis type power amplifier block diagram that adopts quadrature to distribute synthetic schemes; Wherein:

(a) be two-way quadrature synthesis type power amplifier structural representation;

(b) be N (N=2 ^M, M is an integer) and road quadrature synthesis type power amplifier structural representation.

Fig. 3 is the two-way synthesis type power amplifier block diagram that existing homophase distributes synthetic schemes.

Fig. 4 is the amplitude distribution characteristic curve of single-unit quarter-wave 3dB quadrature bridge.

Fig. 5 is the port reflection loss and the isolation curve of single-unit quarter-wave Wilkinson distributor;

(a) be port reflection loss curve;

(b) be the isolation curve.

Fig. 6 is the scenario-frame schematic diagram of traditional broadening bandwidth; Wherein:

(a) for adopting three joint quarter-wave quadrature bridge structural representations;

(b) be that two joint quarter-wave Wilkinsons distribute the synthetic schemes structural representation.

Fig. 7 is with synthesis type power amplifier structural representation for N of the present invention has a lot of social connections.

Fig. 8 is the of the present invention two band synthesis type power amplifier structural representations of having a lot of social connections.

Fig. 9 is the synthetic loss analysis schematic diagram of ideal Distribution comprise network; Wherein:

(a) be ideal Distribution device port definition schematic diagram;

(b) be desirable synthesizer port definition schematic diagram;

(c) be the direct-connected schematic diagram of distributor and synthesizer;

(d) be the graph of relation between synthetic loss and the amplitude balance degree

Figure 10 is the embodiments of the invention structural representation.

Figure 11 is the synthetic damage curve figure of present embodiment.

Embodiment

The broadband radio-frequency combining power amplifier that the present invention proposes reaches embodiment in conjunction with the accompanying drawings and is described in detail as follows:

The N that the present invention the proposes band radio-frequency combining power amplifier of having a lot of social connections as shown in Figure 7, comprises N (N=2 ^M) (first order has 1 quadrature bridge and a load for the amplifier 72 that constitutes of individual amplifier unit 721-72N and the power combiner 73 that formed by the cascade of M level by K quarter-wave 3dB quadrature bridge 731-73K and K load 741-74K, the second level has 2, the third level has 4, and the like); It is characterized in that, comprise that also (first order has one two distributor and 90 ° of phase shifters to the power divider 71 of 90 ° phase shifter 7121-712K of K Wilkinson (Wilkinson) homophase broadband two distributor 7111-711K and K by M level cascade formation, the second level has 2, the third level has 4, and the like, the link position of phase shifter is according to determining with the synthetic delivery outlet position of the synthetic electric bridge of one-level 3dB); M is a positive integer, N=2 ^M, K=2 ^M-1;

Its annexation is: one in two phase output terminal mouths such as constant amplitude of the first order two distributors directly links to each other with the input of partial one two distributor, another output port links to each other with the input of partial another two distributor by 90 ° of phase shifters, and the like; One in two phase output terminal mouths such as constant amplitude of two distributors of M level directly links to each other with the input of amplifier unit, another output port links to each other with the input of amplifier unit by 90 ° of phase shifters, the output of N amplifier unit links to each other with two inputs of the quarter-wave 3dB electric bridge of N/2 M level respectively, an output of each quarter-wave 3dB electric bridge of M level links to each other with load, another output while of two adjacent quarter-wave 3dB electric bridges links to each other with two inputs of a quarter-wave 3dB electric bridge of M-1 level, and the rest may be inferred; The input port of the first order two distributors is the total input of power divider, and a delivery outlet of first order quadrature bridge is the final radio frequency output of synthesis type power amplifier, and another delivery outlet links to each other with load.

Level correlate order of the present invention is decided according to practical situations, and under identical bandwidth condition, M is big more, and amplitude imbalance is big more, and finally synthetic loss is also big more; Same amplitude imbalance requirement, bandwidth is more little, and M can be big more; The span of general M is more than or equal to 1, smaller or equal to 8.

For convenience of explanation, the present invention provides a kind of two-way (M=1) broadband radio-frequency combining power amplifier structure, as shown in Figure 8; It comprises by broadband Wilkinson type two distributors 81 and 90 ° of power dividers that phase shifter 82 constitutes, two amplifier units 83 and the power combiner 84 and the load 85 that are made of a quarter-wave 3dB quadrature bridge; Wherein, an output port 812 in two phase output terminal mouths such as constant amplitude of two distributors 81 links to each other with the input of an amplifier unit 831, another output port 813 links to each other with the input of another amplifier unit 832 by 90 ° of phase shifters 82, the output of two amplifier units links to each other with two inputs of quarter-wave 3dB quadrature bridge respectively, an output of quarter-wave 3dB electric bridge 84 links to each other with load, and another output 841 is final radio-frequency (RF) output end.

Above-mentioned broadband Wilkinson two distributors can comprise 1,2,3 according to bandwidth requirement .... wait the quarter-wave transformer section of integral multiple.

The course of work of the present invention is that example is described as follows with two-way (M=1) broadband radio-frequency combining power amplifier: radio frequency is through input port 811 ingoing power distributors, two- way output 812 and 813 be constant amplitude etc. mutually.Amplifier unit 831 is given in the output of port 812; Port 813 links to each other with the input of 90-degree phase shifter, and the output 821 of phase shifter links to each other with the input of amplifier unit 832.The output phase of amplifier unit 831 falls behind 90 degree than 832, then synthetic one tunnel output of final 841 ports by the 3dB electric bridge of two-way output.

Principle of the present invention draws according to following theory analysis, at first sets up each branch road amplitude balance degree and final relation of synthesizing loss.Distribution network as shown in Figure 9 and comprise network are established each port perfect match, and desirable isolation the between each tributary port, then the collision matrix Sd of distributor can be expressed as

Each branch road amplitude A wherein _i(i=1,2 ..., N) be arithmetic number, phase _i(i=1,2 ... N) be real number, N is a positive integer.Requirement according to the conservation of energy has

$\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{A}_i^2=1---\left(1.2\right)$

The collision matrix S of synthesizer _cFor

In like manner, each branch road amplitude B _i(i=1,2 ..., N) be arithmetic number, phase _i(i=1,2 ... N) be real number, and

$\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{B}_i^2=1---\left(2.2\right)$

When each branch road amplitude is in full accord, A _i=1, B _i=1, i=1,2 ..., N.When considering each branch road amplitude imbalance, note

A _i＝1+Δ _i，-Δ _max≤Δ _i≤Δ _max，i＝1，2…，N (3.1)

B _i＝1+γ _i，-ε _max≤γ _i≤ε _max，i＝1，2…，N (3.2)

Δ _MaxWith ε _MaxIt is respectively the amplitude peak degree of unbalance of distributor and synthesizer.

In 3.1 formula substitutions, 1.2 formulas, in the 3.2 formula substitutions 2.2,

$2\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\Δ}}_i=-\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\Δ}}_i^2,$ $2\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\γ}}_i=-\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\γ}}_i^2---\left(4\right)$

For investigating the synthetic loss that distributes synthetic schemes, establishing Amplifier Gain is constant, and the ground that is without loss of generality is made as 1, be equivalent to distributor and directly be connected with synthesizer, and as Fig. 9 (c), among the figure, distributor 1 port incident wave: a ₁ ^d, the outgoing wave of port 2～port N+1: b ₂ ^d..., b _N+1 ^dThe incident wave of synthesizer port 2～port N+1: a ₂ ^c..., a _N+1 ^c, 1 port outgoing wave: b ₁ ^c, the incident wave of distributor then

Outgoing wave with synthesizer

Between the pass be:

b ^c＝S _ca ^c＝S _cS _da ^d

Promptly

$b_1^c=a_1^d\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{A}_i{B}_i{e}^{j{\mathrm{\φ}}_i}{e}^{j{\mathrm{\β}}_i},$ $b_n^c=0,n=\mathrm{2,3},\·\·\·N+1$

According to 3.1 formulas, 3.2 formulas and 4 formulas have

$b_1^c=a_1^d\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}(1+{\mathrm{\Δ}}_i+{\mathrm{\γ}}_i+{\mathrm{\Δ}}_i{\mathrm{\γ}}_i)e^{{\mathrm{j\φ}}_i}{e}^{{\mathrm{j\β}}_i}$

$=a_1^d\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}[1-\frac{1}{2}{({\mathrm{\Δ}}_i-{\mathrm{\γ}}_i)}^2]e^{{\mathrm{j\φ}}_i}{e}^{j{\mathrm{\β}}_i}$

Synthetic loss

$\mathrm{Loss}=20\lg \left|\frac{b_1^c}{a_1^d}\right|=20\lg \left|\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\right[1-\frac{1}{2}{({\mathrm{\Δ}}_i-{\mathrm{\γ}}_i)}^2\left]e^{j{\mathrm{\φ}}_i}{e}^{j{\mathrm{\β}}_i}\right|---\left(5\right)$

For the homophase scheme, φ is arranged _i=β _iFor orthogonal scheme, φ is arranged _i=-β _iWhich kind of situation no matter, (5) formula all can abbreviation be

$\mathrm{Loss}=20\lg \left|\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\right[1-\frac{1}{2}{({\mathrm{\Δ}}_i-{\mathrm{\γ}}_i)}^2\left]\right|---\left(6\right)$

$\≥20\lg |1-\frac{1}{2}{({\mathrm{\Δ}}_{\max }+{\mathrm{\ϵ}}_{\max })}^2|$

According to (6) formula, synthetic loss is 0 two kinds of situations to be arranged: the one, and Δ _i=γ _i=0, when promptly the amplitude balance degree is desirable; The 2nd, Δ _i=γ _i≠ 0, when promptly amplitude imbalance being arranged, the unbalance response of distributor is in full accord with the synthesizer imbalance on the corresponding branch road.In fact, under the broadband application condition, first kind of situation is impossible realize.And second kind of situation is also inadvisable because there is the imbalance problem of branch road.

The synthesis type power amplifier that the present invention proposes belongs to the bandwidth allocation synthetic schemes, is the compromise of above-mentioned two kinds of situations, even the amplitude imbalance of distributor is 0, and synthesizer has certain amplitude imbalance degree.At this moment, Δ _Max=0, (6) formula is reduced to

$\mathrm{Loss}\≥20\lg |1-\frac{1}{2}{\mathrm{\ϵ}}_{\max }^2|---\left(7\right)$

(7) formula has disclosed the degree of unbalance of synthesizer and the relation between the maximum synthetic loss, according to formula (7) curve plotting such as Fig. 9 (d).As can be seen, when reaching ± 1.25dB (2.5dB peak-to-peak value) at amplitude imbalance, total synthetic loss is no more than 0.1dB, that is to say, if synthesizer adopt 4 grades (M=4, N=16) single-unit 3dB electric bridge is in an octave, the degree of balance of its branch road is 2.4dB, and then total synthetic loss is not more than 0.1dB.

A kind of embodiment of the present invention is an one-level two-way combining power amplifier, its structure as shown in figure 10, it comprises 101, two amplifier units of power divider 1021,1022 that are made of broadband Wilkinson type two distributors and 90 ° of phase shifter 107 and the power combiner 103 that is made of a quarter-wave 3dB quadrature bridge; Wherein:

Wilkinson two distributors in broadband are made up of two pairs of quarter-wave impedance conversion lines, wherein 10121 impedances of first order impedance conversion line are 85 ohm, constitute the rectangular shape of openings at one side by the vacuum transmission line of long 100mm, one side the input port that is provided with power amplifier 1011 of sealing; Second level impedance conversion line 10122 is 64 ohm, constitute the rectangular shape of both sides opening by the long vacuum transmission line of 100mm, two ports of first order opening link to each other with two ports of second level adjacent edge respectively, and two ports of partial another side are as two output ports of distributor; Also comprise and be connected the balance resistance R1 (resistance is 87.8 ohm) between two ports that the first order and the second level links to each other and be connected balance resistance R2 (resistance is 163.4 ohm) between partial two output ports.An output port 10124 of distributor links to each other with an amplifying unit PA1 by transmission time-delay line 1013, another output 10123 is by 90 ° of phase shifters 1014 link to each other with another amplifying unit PA2 (because have 90 ° of phase shifters on an output branch road, so another branch road need be introduced transmission time-delay line with adjusting linear phase shift).Transmission time-delay line 1013 is the long vacuum transmission lines of 50 ohm of 27.9mm.90 ° of phase shifters 1014 are the capacitor C 1 that are connected in the path by two, C2 and a T type network that is parallel to inductance L 1 composition on ground.C1=C2=11pf wherein, L1=17.6nH.The output of transmission time-delay line 1013 and 90 ° of phase shifters 1014 links to each other with the input of two amplifier unit PA1 and PA2.

In the present embodiment, amplifier unit can adopt single tube broadband power amplifier, also can adopt broadband monolithic integrated amplifier.The ground that is without loss of generality is 1 (0dB) with its gain normalization.The output of PA1 and PA2 is connected with 3dB quadrature bridge 103.

The quadrature bridge of present embodiment is that the coupling line of 100mm constitutes by a segment length, and the odd mode impedance of coupling line is 19.7 ohm, and even mode impedance is 126.8 ohm.The output of PA1 is connected with the homophase input port 1032 of quadrature bridge, and the output of PA2 is connected with the quadrature input port 1034 of electric bridge.1033 mouthfuls of electric bridge connect absorbing load 1035; Power after synthetic is by delivery outlet 1031 outputs of electric bridge.

The final synthetic loss of embodiment as shown in figure 11, in octave of 500MHz～1000MHz, synthetic loss is less than 0.1dB.

Claims (1)

1. broadband radio-frequency combining power amplifier, comprise the amplifier that N amplifier unit constitutes, it is characterized in that, also comprise by K quarter-wave 3dB quadrature bridge and K power combiner and K Wilkinson homophase broadband two distributors and K 90 ° of power dividers that phase shifter constitutes by the cascade of M level that load forms by the cascade of M level; M is a positive integer, N=2 ^M, K=2 ^M-1; Its annexation is: one in two phase output terminal mouths such as constant amplitude of the first order two distributors directly links to each other with the input of partial one two distributor, another output port links to each other with the input of partial another two distributor by 90 ° of phase shifters, and the like; One in two phase output terminal mouths such as constant amplitude of two distributors of M level directly links to each other with the input of amplifier unit, another output port links to each other with the input of amplifier unit by 90 ° of phase shifters, the output of N amplifier unit links to each other with two inputs of the quarter-wave 3dB electric bridge of N/2 M level respectively, an output of each quarter-wave 3dB electric bridge of M level links to each other with load, another output while of two adjacent quarter-wave 3dB electric bridges links to each other with two inputs of a quarter-wave 3dB electric bridge of M-1 level, and the rest may be inferred; The input port of the first order two distributors is the total input of power divider, and a delivery outlet of first order quadrature bridge is the final radio frequency output of synthesis type power amplifier, and another delivery outlet links to each other with load.

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