CN103684273B - Feedforward linear power amplifier for radio-frequency communication - Google Patents
Feedforward linear power amplifier for radio-frequency communication Download PDFInfo
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- CN103684273B CN103684273B CN201310721842.1A CN201310721842A CN103684273B CN 103684273 B CN103684273 B CN 103684273B CN 201310721842 A CN201310721842 A CN 201310721842A CN 103684273 B CN103684273 B CN 103684273B
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Abstract
Disclosure one feed forward power amplifier, including the first bonder, the first radio frequency amplifier, the first negative delay unit, the second bonder, the 3rd bonder, the second negative delay unit, the second radio frequency amplifier and the 4th bonder, it is disposed with first between coupled end and first radio frequency amplifier of the first bonder and singly turns Dual module, the first phase inverter and the first negative delay unit；Negative delay unit includes 2 metal-oxide-semiconductors in parallel and 2 branch roads formed by resistance, inductance, capacitances in series；First metal-oxide-semiconductor, the second metal-oxide-semiconductor each grid are connected respectively to the outfan of first another outfan singly turning Dual module and the first phase inverter；3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor each grid are connected respectively to the outfan of second another outfan singly turning Dual module and the second phase inverter.Present invention reduces whole feed forward power amplifier loss, thus substantially increasing work efficiency, also shortening or eliminating delay time and eliminating delay line, reducing the area of feed forward power amplifier further.
Description
Technical field
The present invention relates to a kind of feedforward linear power amplifier, particularly relate to a kind of feedforward linear power amplifier for radio-frequency communication.
Background technology
Along with the fast development of mobile communication cause, communication band becomes more and more crowded.In order to meet channel capacity and the requirement of spectrum efficiency (band efficiency), on the one hand, the load mode of signal becomes multichannel multicarrier from traditional single channel single carrier, on the other hand, the modulation system of signal also becomes more complicated, and people adopt QAM(quadrature amplitude modulation one after another), QPSK(QPSK) etc. linearity modulation technique to improve the availability of frequency spectrum.Radio-frequency power amplifier is all had higher requirement by all these measure.Now in a communications system, radio-frequency power amplifier not only to have the high linearity, also to improve power utilization efficiency as much as possible.So the design of high efficiency linear power amplifier has just become the key in communication system.
Existing feed forward power amplifier is made up of two loops, and first loop is for the counteracting of carrier signal, the extraction of intermodulation signal, thus is called carrier cancellation loop, the second loop for intermodulation signal counteracting, be called that intermodulation offsets ring.Having delay line τ 1 and τ 2 in the two loop respectively, the purpose of delay line is to make the two-way gain that need to offset equal, opposite in phase, while obtaining farthest offsetting, also obtains the extraordinary linearity.But delay line (time delay of delay line τ 2 is approximately in about 6nS) made by existing use coaxial cable or microstrip line, there is certain power attenuation (being approximately in about-1dB), thus reducing the efficiency of whole feed forward power amplifier, and the existence of delay line also increases the area of feed forward power amplifier.
Summary of the invention
The present invention provides a kind of feedforward linear power amplifier for radio-frequency communication, this feedforward linear power amplifier reduces whole feed forward power amplifier loss, thus substantially increasing work efficiency, also shorten or eliminate delay time and eliminate delay line, reducing the area of feed forward power amplifier further.
nullFor reaching above-mentioned purpose，The technical solution used in the present invention is: a kind of feedforward linear power amplifier for radio-frequency communication，Including: the first bonder、First radio frequency amplifier、First negative delay unit、Second bonder、3rd bonder、Second negative delay unit、Second radio frequency amplifier and the 4th bonder，The input of described first bonder receives the carrier signal from carrier source，The straight-through end of the first bonder is connected to the input of the 3rd bonder，The coupled end of the first bonder is connected to the input of the first radio frequency amplifier，The outfan of the first radio frequency amplifier is connected to the input of the second bonder，The coupled end of the second bonder is connected with the coupled end of the 3rd bonder，The straight-through end of the second bonder is connected to the input of the 4th bonder，The straight-through end of the 3rd bonder is connected to the input of the second radio frequency amplifier，The outfan of the second radio frequency amplifier and the straight-through end of the second bonder are connected respectively to coupled end and the input of described 4th bonder，The straight-through end of described 4th bonder is used for connecting antenna；
It is provided with the first phase shifter of series connection, the first amplifier between straight-through end and the 3rd bonder of described first bonder；It is provided with the second phase shifter of series connection, the second amplifier between straight-through end and second radio frequency amplifier of described 3rd bonder；
It is disposed with first between coupled end and first radio frequency amplifier of described first bonder and singly turns Dual module and the first negative delay unit, be provided with first pair between outfan and first radio frequency amplifier of described first negative delay unit and turn single module；The straight-through end of described 3rd bonder and be disposed with second between the second phase shifter and singly turn Dual module and the second negative delay unit, the outfan of described second negative delay unit and be provided with second pair between the second phase shifter and turn single module；
Described first negative delay unit includes the first metal-oxide-semiconductor of parallel connection, the second metal-oxide-semiconductor and the first branch road formed by resistance, inductance, capacitances in series, the second branch road；First metal-oxide-semiconductor, the second metal-oxide-semiconductor each grid are connected respectively to the first outfan singly turning Dual module and another outfan, the respective one end by resistance side of first branch road, the second branch road is as the outfan of the first negative delay unit, the first branch road, the second branch road other end ground connection；
Described second negative delay unit includes the 3rd metal-oxide-semiconductor of parallel connection, the 4th metal-oxide-semiconductor and the 3rd branch road formed by resistance, inductance, capacitances in series, the 4th branch road；3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor each grid are connected respectively to the second outfan singly turning Dual module and another outfan, the respective one end by resistance side of 3rd branch road, the 4th branch road is as the outfan of the second negative delay unit, the 3rd branch road, the 4th branch road other end ground connection.
In technique scheme, further improvement opportunity scheme is as follows:
In such scheme, the first metal-oxide-semiconductor, the second respective source grounding of metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor, the 4th respective source grounding of metal-oxide-semiconductor in described second negative delay unit in described first negative delay unit.
Owing to technique scheme is used, the present invention compared with prior art has the advantage that
The present invention is for the feedforward linear power amplifier of radio-frequency communication, it includes the first bonder, the first radio frequency amplifier, the first negative delay unit, the second bonder, the 3rd bonder, the second negative delay unit, the second radio frequency amplifier and the 4th bonder, it is disposed with first between coupled end and first radio frequency amplifier of the first bonder and singly turns Dual module, the first phase inverter and the first negative delay unit, be provided with first pair between outfan and first radio frequency amplifier of described first negative delay unit and turn single module；It is disposed with second between straight-through end and second radio frequency amplifier of described 3rd bonder and singly turns Dual module, the second phase inverter and the second negative delay unit, be provided with second pair between outfan and second radio frequency amplifier of described second negative delay unit and turn single module；Described negative delay unit includes 2 metal-oxide-semiconductors in parallel and 2 branch roads formed by resistance, inductance, capacitances in series；First metal-oxide-semiconductor, the second metal-oxide-semiconductor each grid are connected respectively to the outfan of first another outfan singly turning Dual module and the first phase inverter, and the respective one end by resistance side of the first branch road, the second branch road is as the outfan of the first negative delay unit；3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor each grid are connected respectively to the outfan of second another outfan singly turning Dual module and the second phase inverter, the respective one end by resistance side of 3rd branch road, the 4th branch road is as the outfan of the second negative delay unit, thus reducing whole feed forward power amplifier loss, thus substantially increasing work efficiency, also shorten or eliminate delay time and eliminate delay line, reducing the area of feed forward power amplifier further.
Accompanying drawing explanation
Accompanying drawing 1 is used for the feedforward linear power amplifier structural representation of radio-frequency communication for the present invention；
Accompanying drawing 2 is negative delay cellular construction schematic diagram in feedforward linear power amplifier of the present invention.
In the figures above: 1, the first bonder；2, the first radio frequency amplifier；3, the first negative delay unit；4, the second bonder；5, the 3rd bonder；6, the second negative delay unit；7, the second radio frequency amplifier；8, the 4th bonder；9, the first phase shifter；10, the first amplifier；11, the second phase shifter；12, the second amplifier；13, first singly turns Dual module；15, first pair turns single module；16, second singly turns Dual module；18, second pair turns single module.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
nullEmbodiment: a kind of feedforward linear power amplifier for radio-frequency communication，Including: the first bonder 1、First radio frequency amplifier 2、First negative delay unit 3、Second bonder 4、3rd bonder 5、Second negative delay unit 6、Second radio frequency amplifier 7 and the 4th bonder 8，The input of described first bonder 1 receives the carrier signal from carrier source，The straight-through end of the first bonder 1 is connected to the input of the 3rd bonder 5，The coupled end of the first bonder 1 is connected to the input of the first radio frequency amplifier 2，2 outfans of the first radio frequency amplifier are connected to the input of the second bonder 4，The coupled end of the second bonder 4 is connected with the coupled end of the 3rd bonder 5，The straight-through end of the second bonder 4 is connected to the input of the 4th bonder 8，The straight-through end of the 3rd bonder 5 is connected to the input of the second radio frequency amplifier 7，The outfan of the second radio frequency amplifier 7 and the straight-through end of the second bonder 4 are connected respectively to coupled end and the input of described 4th bonder 8，The straight-through end of described 4th bonder 8 is used for connecting antenna；
The first phase shifter 9 of series connection it is provided with between straight-through end and the 3rd bonder 5 of described first bonder 1, first amplifier 10, first phase shifter 9 is for the outfan carrier signal phase information according to the 3rd bonder 5, finely tune the straight-through branch road phase place from the first bonder 1, thus realizing contrary in the outfan carrier signal phase of the 3rd bonder 5, first amplifier 10 is for the outfan carrier signal amplitude information according to the 3rd bonder 5, finely tune the straight-through branch road amplitude from the first bonder 1, thus realizing equal at the outfan carrier signal amplitude of the 3rd bonder 5；The second phase shifter 11 of series connection it is provided with between straight-through end and second radio frequency amplifier 7 of described 3rd bonder 5, second amplifier 12, second phase shifter 11 is for the outfan intermodulation signal phase information according to the 4th bonder 8, finely tune the straight-through branch road phase place from the 3rd bonder 5, thus realizing the outfan intermodulation signal opposite in phase at the 4th bonder 8, second amplifier 12 is for the outfan intermodulation signal amplitude information according to the 4th bonder 8, finely tune the straight-through branch road amplitude from the 3rd bonder 5, thus realizing equal at the outfan carrier signal amplitude of the 4th bonder 8.
It is disposed with first between coupled end and first radio frequency amplifier 2 of described first bonder 1 and singly turns Dual module 13 and the first negative delay unit 3, be provided with first pair between outfan and first radio frequency amplifier 2 of described first negative delay unit 3 and turn single module 15；The straight-through end of described 3rd bonder 5 and be disposed with second between the second phase shifter 11 and singly turn Dual module 16 and the second negative delay unit 6, the outfan of described second negative delay unit 6 and be provided with second pair between the second phase shifter 11 and turn single module 18；
Described first negative delay unit 3 includes the first metal-oxide-semiconductor of parallel connection, the second metal-oxide-semiconductor and the first branch road formed by resistance, inductance, capacitances in series, the second branch road；First metal-oxide-semiconductor, the second metal-oxide-semiconductor each grid are connected respectively to the first outfan singly turning Dual module 13 and another outfan, the respective one end by resistance side of first branch road, the second branch road is as the outfan of the first negative delay unit 3, the first branch road, the second branch road other end ground connection；
Described second negative delay unit 6 includes the 3rd metal-oxide-semiconductor of parallel connection, the 4th metal-oxide-semiconductor and the 3rd branch road formed by resistance, inductance, capacitances in series, the 4th branch road；3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor each grid are connected respectively to the second outfan singly turning Dual module 16 and another outfan, the respective one end by resistance side of 3rd branch road, the 4th branch road is as the outfan of the second negative delay unit 6, the 3rd branch road, the 4th branch road other end ground connection.
First metal-oxide-semiconductor, the second respective source grounding of metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor, the 4th respective source grounding of metal-oxide-semiconductor in described second negative delay unit 6 in above-mentioned first negative delay unit 3.
Above-described embodiment only for technology design and the feature of the present invention are described, its object is to allow person skilled in the art will appreciate that present disclosure and to implement according to this, can not limit the scope of the invention with this.All equivalences made according to spirit of the invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (2)
- null1. the feedforward linear power amplifier for radio-frequency communication，It is characterized in that: including: the first bonder (1)、First radio frequency amplifier (2)、First negative delay unit (3)、Second bonder (4)、3rd bonder (5)、Second negative delay unit (6)、Second radio frequency amplifier (7) and the 4th bonder (8)，The input of described first bonder (1) receives the carrier signal from carrier source，The straight-through end of the first bonder (1) is connected to the input of the 3rd bonder (5)，The coupled end of the first bonder (1) is connected to the input of the first radio frequency amplifier (2)，The outfan of the first radio frequency amplifier (2) is connected to the input of the second bonder (4)，The coupled end of the second bonder (4) is connected with the coupled end of the 3rd bonder (5)，The straight-through end of the 3rd bonder (5) is connected to the input of the second radio frequency amplifier (7)，The outfan of the second radio frequency amplifier (7) and the straight-through end of the second bonder (4) are connected respectively to coupled end and the input of described 4th bonder (8)，The straight-through end of described 4th bonder (8) is used for connecting antenna；It is provided with first phase shifter (9) of series connection, the first amplifier (10) between straight-through end and the 3rd bonder (5) of described first bonder (1)；It is provided with second phase shifter (11) of series connection, the second amplifier (12) between straight-through end and second radio frequency amplifier (7) of described 3rd bonder (5)；It is disposed with first between coupled end and first radio frequency amplifier (2) of described first bonder (1) and singly turns Dual module (13) and the first negative delay unit (3), be provided with first pair between outfan and first radio frequency amplifier (2) of described first negative delay unit (3) and turn single module (15)；The straight-through end of described 3rd bonder (5) and be disposed with second between the second phase shifter (11) and singly turn Dual module (16) and the second negative delay unit (6), the outfan of described second negative delay unit (6) and be provided with second pair between the second phase shifter (11) and turn single module (18)；Described first negative delay unit (3) includes the first metal-oxide-semiconductor of parallel connection, the second metal-oxide-semiconductor and the first branch road formed by resistance, inductance, capacitances in series, the second branch road；First metal-oxide-semiconductor, the second metal-oxide-semiconductor each grid are connected respectively to first outfan singly turning Dual module (13) and another outfan, the respective one end by resistance side of first branch road, the second branch road is as the outfan of the first negative delay unit (3), the first branch road, the second branch road other end ground connection；Described second negative delay unit (6) includes the 3rd metal-oxide-semiconductor of parallel connection, the 4th metal-oxide-semiconductor and the 3rd branch road formed by resistance, inductance, capacitances in series, the 4th branch road；3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor each grid are connected respectively to second outfan singly turning Dual module (16) and another outfan, the respective one end by resistance side of 3rd branch road, the 4th branch road is as the outfan of the second negative delay unit (6), the 3rd branch road, the 4th branch road other end ground connection.
- 2. feedforward linear power amplifier according to claim 1, it is characterized in that: the first metal-oxide-semiconductor, the second respective source grounding of metal-oxide-semiconductor in described first negative delay unit (3), the 3rd metal-oxide-semiconductor, the 4th respective source grounding of metal-oxide-semiconductor in described second negative delay unit (6).
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| CN201310721842.1A CN103684273B (en) | 2013-12-24 | 2013-12-24 | Feedforward linear power amplifier for radio-frequency communication |
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| CN201310721842.1A CN103684273B (en) | 2013-12-24 | 2013-12-24 | Feedforward linear power amplifier for radio-frequency communication |
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| CN103684273A CN103684273A (en) | 2014-03-26 |
| CN103684273B true CN103684273B (en) | 2016-07-20 |
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| CN1751434A (en) * | 2003-02-14 | 2006-03-22 | 电力波技术公司 | Enhanced efficiency feed forward power amplifier utilizing reduced cancellation bandwidth and small error amplifier |
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| TW201123711A (en) * | 2009-12-24 | 2011-07-01 | Realtek Semiconductor Corp | Broad-band active delay line and thereof method |
| CN102801391A (en) * | 2012-08-10 | 2012-11-28 | 昆山美博通讯科技有限公司 | Modular feedforward power amplifier |
| CN203775143U (en) * | 2013-12-24 | 2014-08-13 | 昆山美博通讯科技有限公司 | Feed-forward linear power amplifier for radio frequency communication |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7049907B2 (en) * | 2001-08-24 | 2006-05-23 | Powerwave Technologies, Inc. | System and method for adjusting group delay |
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2013
- 2013-12-24 CN CN201310721842.1A patent/CN103684273B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6100757A (en) * | 1998-09-30 | 2000-08-08 | Motorola, Inc. | Variable time delay network method and apparatus therof |
| CN1399805A (en) * | 2000-06-14 | 2003-02-26 | K&L微波公司 | Delay line filter |
| CN1751434A (en) * | 2003-02-14 | 2006-03-22 | 电力波技术公司 | Enhanced efficiency feed forward power amplifier utilizing reduced cancellation bandwidth and small error amplifier |
| JP2007088617A (en) * | 2005-09-20 | 2007-04-05 | Mitsubishi Electric Corp | Feedforward amplifier |
| TW201123711A (en) * | 2009-12-24 | 2011-07-01 | Realtek Semiconductor Corp | Broad-band active delay line and thereof method |
| CN102801391A (en) * | 2012-08-10 | 2012-11-28 | 昆山美博通讯科技有限公司 | Modular feedforward power amplifier |
| CN203775143U (en) * | 2013-12-24 | 2014-08-13 | 昆山美博通讯科技有限公司 | Feed-forward linear power amplifier for radio frequency communication |
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