CN107493076A - Improve the Doherty amplifiers of phase equalization using reassembling type delay part - Google Patents
Improve the Doherty amplifiers of phase equalization using reassembling type delay part Download PDFInfo
- Publication number
- CN107493076A CN107493076A CN201710474709.9A CN201710474709A CN107493076A CN 107493076 A CN107493076 A CN 107493076A CN 201710474709 A CN201710474709 A CN 201710474709A CN 107493076 A CN107493076 A CN 107493076A
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- Prior art keywords
- delay part
- amplifier
- microstrip line
- signal
- delay
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0288—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Amplifiers (AREA)
Abstract
The present invention is a kind of Doherty amplifiers for improving phase equalization using reassembling type delay part, it is characterized in that including input signal, power divider, signal transmission microstrip line, dismountable delay part, main amplifier, secondary amplifier, Doherty amplifiers.Advantages of the present invention：Major and minor path input adds dismountable delay part to improve the phase equalization of main amplifier output signal and secondary amplifier output signal, coordinate the bias condition for adjust major and minor amplifier to make Doherty amplifier operations in optimum state simultaneously, reach the linearity of improvement Doherty amplifying circuits and the effect of power added efficiency.
Description
Technical field
The present invention relates to a kind of Doherty amplifiers for improving phase equalization using reassembling type delay part, belong to half
Conductor technology field.
Background technology
Radio frequency amplifying circuit is widely used in communicating, navigates, identifies, observing and controlling, radio and television, remote sensing remote measurement, radio day
The radio system of the applications such as text, electronic countermeasure, it is attached in order to improve the linearity of radio frequency amplifying circuit and power in related application
Part efficiency, Doherty circuits are widely studied and implemented, and its effect obtains the accreditation of industry.Amplify implement body in Doherty
Implementation in, due to amplifier amplitude-phase（AM-PM）Non-linear, and phase misalignment present in work(point, combiner circuit
Weighing apparatus, is inevitably present a certain degree of phase imbalance, causes between main channel output signal and subaisle output signal
Doherty amplifiers can not give play to optimal performance；For this problem, Freescale company etc. is proposed Amplitude phase
Control circuit is applied to the phase equalization of Doherty radio frequency amplifying circuits to improve the Doherty amplifying circuits linearity and power
The circuit structure of added efficiency, the proof that its validity is put into practice, but be increased Doherty the shortcomings that this scheme and put
The scale of big circuit, need to increase power supply and expanding digital control module.
The content of the invention
The present invention is directed to the phase imbalance problem of major and minor multi-channel output signal in Doherty circuits, proposes that a kind of utilize is torn open
Dress formula delay part improves the Doherty amplifiers of phase equalization, can overcome the drawbacks described above present in prior art, reduce
The allotment difficulty of Doherty amplifying circuits, improve the phase equalization of the major and minor multi-channel output signal of Doherty amplifying circuits, avoid
The change of circuit structure or circuit scale；For the radio frequency amplifying circuit of the applications such as base station, radar, its linearity and power are improved
Added efficiency has positive effect.
The technical solution of the present invention：Improve the Doherty amplifiers of phase equalization using reassembling type delay part, it is tied
Structure is the input of the access power distributor 102 of input signal 101, defeated using lange bridges, quadrature hybrid circuit form
Enter signal 101 to be divided into two by power divider, two paths of signals phase difference is 90 degree；Enter through signal transmission microstrip line 103
Dismountable delay part 104, realized by the delay part that different delays time or phase difference are inserted in signal path to path
The adjustment of middle signal phase, dismountable delay part 104 can be based on microstrip line and realize, may be based on inductance, capacitance network realization,
It realizes that technique can be based on PCB circuits, ceramic circuit, LTCC circuit, the connection of dismountable delay part 104 and both ends microstrip line
Form is using pressure point connection, bridged-style；Main amplifier 105 is into carrier amplifier, and it is usually AB class working conditions, pair amplification
Device 106 is also referred to as peak amplifier, usually C classes working condition, and when injection end power is smaller, 106 inactivitys of pair amplifier are defeated
Go out, peak power compensation main amplifier output signal is exported when injecting power increases to pair amplifier 106 when secondary amplifier is opened
Compression artefacts；The output signal of major and minor amplifier is carried out after 90 ° of phase equilibriums in the synthesis of Doherty amplifiers 107 and
Output.
A kind of phase equalization that reassembling type delay part is applied to Doherty radio frequency amplifying circuits is put with improving Doherty
The circuit of big circuit linearity degree and power added efficiency, passes through the input of the major and minor channel amplifier in Doherty amplifying circuits
End adds reassembling type delay part, improves the phase equalization of main amplifier output signal and secondary amplifier output signal, to improve
The linearity and power added efficiency of Doherty amplifying circuits.
Advantages of the present invention：Major and minor path input adds dismountable delay part to improve main amplifier output signal
With the phase equalization of secondary amplifier output signal, while the bias condition for adjusting major and minor amplifier is coordinated to make Doherty amplifiers
Optimum state is operated in, reaches the linearity for improving Doherty amplifying circuits and the effect of power added efficiency.
Brief description of the drawings
Accompanying drawing 1 is the block topology for the Doherty amplifiers for improving phase equalization using reassembling type delay part.
Accompanying drawing 2（a）With accompanying drawing 2（b）It is the bridged-style schematic diagram for postponing part and both ends microstrip line.
Accompanying drawing 3（a）With accompanying drawing 3（b）It is the pressure point type of attachment schematic diagram for postponing part and both ends microstrip line；Wherein accompanying drawing 3
（a）For attachment structure plan view, accompanying drawing 3（b）For the delay part schematic diagram of unlike signal delay.
101 in figure be input signal, and 102 be input power divider, and 103 be that signal transmits microstrip line, and 104 is can
Reassembling type postpones part, and 105 be main amplifier, and 106 be secondary amplifier, and 107 be Doherty amplifiers, and 201 be B metallic carriers,
202 be that signal transmits microstrip line, and 203 be bridge joint metal derby, and 204 insulating fixing pieces composition bridgeware, 205 be the air gap, 206
It is PCB circuit delay parts for fixing hole, 207,301 be C metallic carriers, and 302 be that C signal transmits microstrip line, and 303 be delay part gold
Belong to pressure point, 304 be common burning porcelain circuit delay part or PCB circuit delay parts, and 305 be delay part fixing hole.
Embodiment
As shown in figure 1, improving the Doherty amplifiers of phase equalization using reassembling type delay part, its structure is input letter
The input of number 101 access power distributors 102 is logical using lange bridges, quadrature hybrid circuit form, input signal 101
Overpower distributor is divided into two, and two paths of signals phase difference is 90 degree；Enter dismountable delay through signal transmission microstrip line 103
Part 104, realized by the delay part that different delays time or phase difference are inserted in signal path to signal phase in path
Adjustment, dismountable delay part 104 can be based on microstrip line and realize, may be based on inductance, capacitance network realizes that it realizes that technique can
Based on PCB circuits, ceramic circuit, LTCC circuit, the type of attachment of dismountable delay part 104 and both ends microstrip line uses pressure point
Connection, bridged-style；Main amplifier 105 is into carrier amplifier, and it is usually AB class working conditions, and secondary amplifier 106 is also referred to as peak
It is worth amplifier, usually C classes working condition, the inactivity of pair amplifier 106 exports when injection end power is smaller, works as injecting power
Increase to the compression artefacts that pair amplifier 106 when secondary amplifier is opened exports peak power compensation main amplifier output signal；It is right
The output signal of major and minor amplifier synthesize and export in Doherty amplifiers 107 after 90 ° of phase equilibriums.
Dismountable delay part, include input, the output node of main channel, the input of subaisle, output node.
Dismountable delay part is that pressure point is connected or bridged with the type of attachment of signal transmission microstrip line.
As shown in Fig. 2 the bridged-style of delay part and both ends microstrip line, its structure is PCB circuit delays part 207 and both ends
B signal transmits the bridged-style that microstrip line microstrip line 202 is, B signal transmission microstrip line 202 is connect on B metallic carriers 201；Bridge joint
Metal derby 203 and insulating fixing piece 204 form bridgeware, and insulating fixing piece is used for fixed delay part provided with fixing hole 208；If
The air gap 205 for setting to 0 .5mm is advantageous to facilitate the installation of PCB circuit delays part 207 and avoids heat expansion cold to a certain extent
Integrity problem caused by contracting.
As shown in figure 3, the pressure point type of attachment of delay part and both ends microstrip line, its structure is that C metallic carriers 301 connect
C signal transmits microstrip line 302；C delay parts 304 are connect on C signal transmission microstrip line 302, C delay parts 304 are provided with delay between both ends
Part metal coupling pressure point 303, delay part 304 can be real based on the common burning porcelain such as LTCC technique or the form of the additional encapsulation of PCB circuits
Existing, the input/output terminal for postponing part is provided with metal coupling pressure point, and 303 delay part is used for fixed delay provided with fixing hole 305
Part.
Due to amplifier amplitude-phase in main channel and subaisle（AM-PM）Non-linear, and work(point, combiner circuit
Present in phase imbalance, a certain degree of phase imbalance is inevitably present between main channel signal and subaisle signal,
Influence compensation effect of the subaisle signal to main channel signal compression artefacts.It is dismountable when being added in major and minor path input
After postponing part, the phase of major and minor channel signal can neatly be changed by dismountable delay part and found optimal major and minor
Channel phases equilibrium state, while coordinate the bias condition for adjusting major and minor amplifier to make Doherty amplifier operations in optimal shape
State；Dismountable delay part has flexibility, greatly reduces cumbersome passive element debugging process, reduces the work of debugging process
Measure and challenge.
The present invention is to add dismountable delay part in major and minor path input to improve main amplifier output signal and pair
The phase equalization of amplifier output signal, while coordinate the bias condition for adjusting major and minor amplifier to make Doherty amplifier operations
In optimum state, reach the linearity for improving Doherty amplifying circuits and the effect of power added efficiency.Similar to shown in Fig. 1
Other circuit forms of topological structure such as add dismountable delay part in major and minor channel output end, or in multiple signal sections
Point adds dismountable delay part etc. simultaneously, belongs to present disclosure.
Claims (5)
1. improve the Doherty amplifiers of phase equalization using reassembling type delay part, it is characterized in that input signal access power point
The input of orchestration, using lange bridges, quadrature hybrid circuit form, input signal is divided into two by power divider,
Two paths of signals phase difference is 90 degree；Enter dismountable delay part through signal transmission microstrip line, by being inserted in signal path
The delay part of different delays time or phase difference realizes the adjustment to signal phase in path, and dismountable delay part can be based on micro-
Band line is realized, or is realized based on inductance, capacitance network, and it realizes that technique can be based on PCB circuits, ceramic circuit, LTCC circuit, can
Reassembling type delay part is connected with the type of attachment of both ends microstrip line using pressure point, bridged-style；Main amplifier into carrier amplifier,
It is usually AB class working conditions, and secondary amplifier is also referred to as peak amplifier, usually C classes working condition, when injection end power compared with
Hour secondary amplifier inactivity output, when injecting power, which increases to secondary amplifier, to be opened, secondary amplifier output peak power is mended
Repay the compression artefacts of main amplifier output signal；The output signal of major and minor amplifier is carried out after 90 ° of phase equilibriums
Doherty amplifiers synthesize and output.
2. the Doherty amplifiers according to claim 1 for improving phase equalization using reassembling type delay part, it is characterized in that
Dismountable delay part, include input, the output node of main channel, the input of subaisle, output node.
3. the Doherty amplifiers according to claim 2 for improving phase equalization using reassembling type delay part, it is characterized in that
Dismountable delay part is that pressure point is connected or bridged with the type of attachment of signal transmission microstrip line.
4. the Doherty amplifiers according to claim 3 for improving phase equalization using reassembling type delay part, it is characterized in that
The bridged-style of described dismountable delay part and both ends microstrip line, its structure are that PCB circuit delays part passes with both ends B signal
The bridged-style that defeated microstrip line microstrip line is, B signal transmission microstrip line is connect on B metallic carriers；Bridge metal derby and insulation is fixed
Part forms bridgeware；0.5mm the air gap is set to be advantageous to facilitate the installation of PCB circuit delay parts and keep away to a certain extent
Exempt from the caused integrity problem that expands with heat and contract with cold.
5. the Doherty amplifiers according to claim 3 for improving phase equalization using reassembling type delay part, it is characterized in that
The pressure point type of attachment of described dismountable delay part and both ends microstrip line, its structure are that C metallic carriers connection C signal passes
Defeated microstrip line；C delay parts are connect on C signal transmission microstrip line, delay part metal pressure point are provided between C delay parts both ends, delay part can
Realized based on LTCC techniques.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710474709.9A CN107493076A (en) | 2017-06-21 | 2017-06-21 | Improve the Doherty amplifiers of phase equalization using reassembling type delay part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710474709.9A CN107493076A (en) | 2017-06-21 | 2017-06-21 | Improve the Doherty amplifiers of phase equalization using reassembling type delay part |
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| CN107493076A true CN107493076A (en) | 2017-12-19 |
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| CN201710474709.9A Pending CN107493076A (en) | 2017-06-21 | 2017-06-21 | Improve the Doherty amplifiers of phase equalization using reassembling type delay part |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5420541A (en) * | 1993-06-04 | 1995-05-30 | Raytheon Company | Microwave doherty amplifier |
| US20020135425A1 (en) * | 2001-03-21 | 2002-09-26 | Postech Foundation | Full output matching apparatus of a microwave doherty amplifier |
| CN202535310U (en) * | 2012-03-07 | 2012-11-14 | 武汉正维电子技术有限公司 | Multistep multi-way Doherty amplifier |
| CN105556833A (en) * | 2013-12-19 | 2016-05-04 | 罗德施瓦兹两合股份有限公司 | Doherty amplifier comprising an additional delaying member |
| CN106470015A (en) * | 2015-08-20 | 2017-03-01 | 中兴通讯股份有限公司 | Symmetrical Doherty Doherty power amplifier device and power amplifier |
-
2017
- 2017-06-21 CN CN201710474709.9A patent/CN107493076A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5420541A (en) * | 1993-06-04 | 1995-05-30 | Raytheon Company | Microwave doherty amplifier |
| US20020135425A1 (en) * | 2001-03-21 | 2002-09-26 | Postech Foundation | Full output matching apparatus of a microwave doherty amplifier |
| CN202535310U (en) * | 2012-03-07 | 2012-11-14 | 武汉正维电子技术有限公司 | Multistep multi-way Doherty amplifier |
| CN105556833A (en) * | 2013-12-19 | 2016-05-04 | 罗德施瓦兹两合股份有限公司 | Doherty amplifier comprising an additional delaying member |
| CN106470015A (en) * | 2015-08-20 | 2017-03-01 | 中兴通讯股份有限公司 | Symmetrical Doherty Doherty power amplifier device and power amplifier |
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Application publication date: 20171219 |