CN203775143U - Feed-forward linear power amplifier for radio frequency communication - Google Patents
Feed-forward linear power amplifier for radio frequency communication Download PDFInfo
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- CN203775143U CN203775143U CN201320859242.7U CN201320859242U CN203775143U CN 203775143 U CN203775143 U CN 203775143U CN 201320859242 U CN201320859242 U CN 201320859242U CN 203775143 U CN203775143 U CN 203775143U
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- coupler
- delay unit
- oxide
- branch road
- radio frequency
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Abstract
The utility model discloses a feed-forward power amplifier, which comprises a first coupler, a first radio frequency amplifier, a first negative delay unit, a second coupler, a third coupler, a second negative delay unit, a second radio frequency amplifier and a fourth coupler, wherein a first single-to-dual module, a first inverter and the first negative delay unit are sequentially arranged between the coupling end of the first coupler and the first radio amplifier; each negative delay unit comprises two parallel MOS (metal oxide semiconductor) transistors and two branch circuits, and each branch circuit consists of a resistor, an inductor and a capacitor, which are connected in series; the gates of the first and second MOS transistors are connected to the other output end of the first single-to-dual module and the output end of the first inverter respectively, and the gates of the third and fourth MOS transistors are connected to the other output end of a second single-to-dual module and the output end of a second inverter. According to the feed-forward power amplifier, the loss of the whole feed-forward power amplifier is reduced, so that the working efficiency is greatly improved, the delay time is also shortened or eliminated, the delay time is eliminated, and the area of the feed-forward power amplifier is further reduced.
Description
Technical field
The utility model relates to a kind of feedforward linear power amplifier, relates in particular to a kind of feedforward linear power amplifier for radio-frequency communication.
Background technology
Along with the fast development of mobile communication cause, it is more and more crowded that communication band becomes.In order to meet the requirement of channel capacity and spectrum efficiency (band efficiency), on the one hand, the load mode of signal has become multichannel multicarrier from traditional single channel single carrier, on the other hand, it is more complicated that the modulation system of signal also becomes, and people adopt QAM(quadrature amplitude modulation one after another), QPSK(Quadrature Phase Shift Keying) etc. linearity modulation technique improve the availability of frequency spectrum.These all measures are all had higher requirement to radio-frequency power amplifier.In present communication system, radio-frequency power amplifier not only will have the high linearity, also will improve as much as possible power utilization efficiency.So the design of high efficiency linear power amplifier has just become the key in communication system.
Existing feed forward power amplifier consists of two loops, and first loop is for the counteracting of carrier signal, the extraction of intermodulation signal, thereby be called carrier cancellation loop, the second loop for intermodulation signal counteracting, be called intermodulation and offset ring.In these two loops, have respectively delay line τ 1 and τ 2, the object of delay line is to allow need the two-way gain of offsetting to equate that single spin-echo, when obtaining maximum counteracting, also obtains the extraordinary linearity.But existing use coaxial cable or microstrip line are made delay line (time delay of delay line τ 2 is greatly about 6nS left and right), there is certain power loss (greatly about-about 1dB), thereby reduced the efficiency of whole feed forward power amplifier, and the existence of delay line has also increased the area of feed forward power amplifier.
Summary of the invention
The utility model provides a kind of feedforward linear power amplifier for radio-frequency communication, this feedforward linear power amplifier has reduced whole feed forward power amplifier loss, thereby greatly improved operating efficiency, also shorten or eliminate delay time and omitted delay line, further having dwindled the area of feed forward power amplifier.
For achieving the above object, the technical solution adopted in the utility model is: a kind of feedforward linear power amplifier for radio-frequency communication, comprise: the first coupler, the first radio frequency amplifier, the first negative delay unit, the second coupler, the 3rd coupler, the second negative delay unit, the second radio frequency amplifier and the 4th coupler, the input of described the first coupler receives the carrier signal from carrier source, the straight-through end of the first coupler is connected to the input of the 3rd coupler, the coupled end of the first coupler is connected to the input of the first radio frequency amplifier, the output of the first radio frequency amplifier is connected to the input of the second coupler, the coupled end of the second coupler is connected with the coupled end of the 3rd coupler, the straight-through end of the second coupler is connected to the input of the 4th coupler, the straight-through end of the 3rd coupler is connected to the input of the second radio frequency amplifier, the straight-through end of the output of the second radio frequency amplifier and the second coupler is connected respectively to coupled end and the input of described the 4th coupler, the straight-through end of described the 4th coupler is used for connecting antenna,
Between the straight-through end of described the first coupler and the 3rd coupler, be provided with the first phase shifter, first amplifier of series connection; Between the straight-through end of described the 3rd coupler and the second radio frequency amplifier, be provided with the second phase shifter, second amplifier of series connection;
Between the coupled end of described the first coupler and the first radio frequency amplifier, be disposed with first and singly turn Dual module and the first negative delay unit, between the output of described the first negative delay unit and the first radio frequency amplifier, be provided with first pair and turn single module; Between the straight-through end of described the 3rd coupler and the second phase shifter, be disposed with second and singly turn Dual module and the second negative delay unit, between the output of described the second negative delay unit and the second phase shifter, be provided with second pair and turn single module;
Described the first negative delay unit comprises the first metal-oxide-semiconductor in parallel, the second metal-oxide-semiconductor and the first branch road, the second branch road that by resistance, inductance, capacitances in series, form; The first metal-oxide-semiconductor, the second metal-oxide-semiconductor separately grid are connected respectively to the first output and another output that singly turns Dual module, the first branch road, the second branch road one end by resistance side is separately as the output of the first negative delay unit, the first branch road, the second branch road other end ground connection;
Described the second negative delay unit comprises the 3rd metal-oxide-semiconductor in parallel, the 4th metal-oxide-semiconductor and the 3rd branch road, the 4th branch road that by resistance, inductance, capacitances in series, form; The 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor separately grid are connected respectively to the second output and another output that singly turns Dual module, the 3rd branch road, the 4th branch road one end by resistance side is separately as the output of the second negative delay unit, the 3rd branch road, the 4th branch road other end ground connection.
In technique scheme, further improve technical scheme as follows:
In such scheme, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor source grounding separately in described the first negative delay unit, the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor source grounding separately in described the second negative delay unit.
Because technique scheme is used, the utility model compared with prior art has following advantages:
The utility model is for the feedforward linear power amplifier of radio-frequency communication, it comprises the first coupler, the first radio frequency amplifier, the first negative delay unit, the second coupler, the 3rd coupler, the second negative delay unit, the second radio frequency amplifier and the 4th coupler, between the coupled end of the first coupler and the first radio frequency amplifier, be disposed with first and singly turn Dual module, the first inverter and the first negative delay unit, between the output of described the first negative delay unit and the first radio frequency amplifier, be provided with first pair and turn single module; Between the straight-through end of described the 3rd coupler and the second radio frequency amplifier, be disposed with second and singly turn Dual module, the second inverter and the second negative delay unit, between the output of described the second negative delay unit and the second radio frequency amplifier, be provided with second pair and turn single module; Described negative delay unit comprises 2 metal-oxide-semiconductors in parallel and 2 branch roads that form by resistance, inductance, capacitances in series; The first metal-oxide-semiconductor, the second metal-oxide-semiconductor separately grid are connected respectively to first and singly turn another output of Dual module and the output of the first inverter, and the first branch road, the second branch road one end by resistance side is separately as the output of the first negative delay unit; The 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor separately grid are connected respectively to second and singly turn another output of Dual module and the output of the second inverter, the 3rd branch road, the 4th branch road one end by resistance side is separately as the output of the second negative delay unit, thereby reduced whole feed forward power amplifier loss, thereby greatly improved operating efficiency, also shorten or eliminate delay time and omitted delay line, further having dwindled the area of feed forward power amplifier.
Accompanying drawing explanation
Accompanying drawing 1 is the feedforward linear power amplifier structural representation of the utility model for radio-frequency communication;
Accompanying drawing 2 is negative delay cellular construction schematic diagram in the utility model feedforward linear power amplifier.
In above accompanying drawing: 1, the first coupler; 2, the first radio frequency amplifier; 3, the first negative delay unit; 4, the second coupler; 5, the 3rd coupler; 6, the second negative delay unit; 7, the second radio frequency amplifier; 8, the 4th coupler; 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.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described:
Embodiment: a kind of feedforward linear power amplifier for radio-frequency communication, comprise: the first coupler 1, the first radio frequency amplifier 2, the first negative delay unit 3, the second coupler 4, the 3rd coupler 5, the second negative delay unit 6, the second radio frequency amplifier 7 and the 4th coupler 8, the input of described the first coupler 1 receives the carrier signal from carrier source, the straight-through end of the first coupler 1 is connected to the input of the 3rd coupler 5, the coupled end of the first coupler 1 is connected to the input of the first radio frequency amplifier 2, 2 outputs of the first radio frequency amplifier are connected to the input of the second coupler 4, the coupled end of the second coupler 4 is connected with the coupled end of the 3rd coupler 5, the straight-through end of the second coupler 4 is connected to the input of the 4th coupler 8, the straight-through end of the 3rd coupler 5 is connected to the input of the second radio frequency amplifier 7, the straight-through end of the output of the second radio frequency amplifier 7 and the second coupler 4 is connected respectively to coupled end and the input of described the 4th coupler 8, the straight-through end of described the 4th coupler 8 is used for connecting antenna,
Between the straight-through end of described the first coupler 1 and the 3rd coupler 5, be provided with the first phase shifter 9 of series connection, the first amplifier 10, the first phase shifter 9 is for according to the output carrier signal phase information of the 3rd coupler 5, fine setting is from the straight-through branch road phase place of the first coupler 1, thereby realize contrary in the output carrier signal phase of the 3rd coupler 5, the first amplifier 10 is for according to the output carrier signal amplitude information of the 3rd coupler 5, fine setting is from the straight-through branch road amplitude of the first coupler 1, thereby the output carrier signal amplitude of realizing at the 3rd coupler 5 equates, between the straight-through end of described the 3rd coupler 5 and the second radio frequency amplifier 7, be provided with the second phase shifter 11 of series connection, the second amplifier 12, the second phase shifter 11 is for according to the output intermodulation signal phase information of the 4th coupler 8, fine setting is from the straight-through branch road phase place of the 3rd coupler 5, thereby realize the output intermodulation signal single spin-echo at the 4th coupler 8, the second amplifier 12 is for according to the output intermodulation signal amplitude information of the 4th coupler 8, fine setting is from the straight-through branch road amplitude of the 3rd coupler 5, thereby the output carrier signal amplitude of realizing at the 4th coupler 8 equates.
Between the coupled end of described the first coupler 1 and the first radio frequency amplifier 2, be disposed with first and singly turn Dual module 13 and the first negative delay unit 3, between the output of described the first negative delay unit 3 and the first radio frequency amplifier 2, be provided with first pair and turn single module 15; Between the straight-through end of described the 3rd coupler 5 and the second phase shifter 11, be disposed with second and singly turn Dual module 16 and the second negative delay unit 6, between the output of described the second negative delay unit 6 and the second phase shifter 11, be provided with second pair and turn single module 18;
Described the first negative delay unit 3 comprises the first metal-oxide-semiconductor in parallel, the second metal-oxide-semiconductor and the first branch road, the second branch road that by resistance, inductance, capacitances in series, form; The first metal-oxide-semiconductor, the second metal-oxide-semiconductor separately grid are connected respectively to the first output and another output that singly turns Dual module 13, the first branch road, the second branch road one end by resistance side is separately as the output of the first negative delay unit 3, the first branch road, the second branch road other end ground connection;
Described the second negative delay unit 6 comprises the 3rd metal-oxide-semiconductor in parallel, the 4th metal-oxide-semiconductor and the 3rd branch road, the 4th branch road that by resistance, inductance, capacitances in series, form; The 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor separately grid are connected respectively to the second output and another output that singly turns Dual module 16, the 3rd branch road, the 4th branch road one end by resistance side is separately as the output of the second negative delay unit 6, the 3rd branch road, the 4th branch road other end ground connection.
The first metal-oxide-semiconductor, the second metal-oxide-semiconductor source grounding separately in above-mentioned the first negative delay unit 3, the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor source grounding separately in described the second negative delay unit 6.
Above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection range of the present utility model.
Claims (2)
1. the feedforward linear power amplifier for radio-frequency communication, it is characterized in that: comprising: the first coupler (1), the first radio frequency amplifier (2), the first negative delay unit (3), the second coupler (4), the 3rd coupler (5), the second negative delay unit (6), the second radio frequency amplifier (7) and the 4th coupler (8), the input of described the first coupler (1) receives the carrier signal from carrier source, the straight-through end of the first coupler (1) is connected to the input of the 3rd coupler (5), the coupled end of the first coupler (1) is connected to the input of the first radio frequency amplifier (2), (2) output of the first radio frequency amplifier is connected to the input of the second coupler (4), the coupled end of the second coupler (4) is connected with the coupled end of the 3rd coupler (5), the straight-through end of the second coupler (4) is connected to the input of the 4th coupler (8), the straight-through end of the 3rd coupler (5) is connected to the input of the second radio frequency amplifier (7), the straight-through end of the output of the second radio frequency amplifier (7) and the second coupler (4) is connected respectively to coupled end and the input of described the 4th coupler (8), the straight-through end of described the 4th coupler (8) is used for connecting antenna,
Between the straight-through end of described the first coupler (1) and the 3rd coupler (5), be provided with the first phase shifter (9), first amplifier (10) of series connection; Between the straight-through end of described the 3rd coupler (5) and the second radio frequency amplifier (7), be provided with the second phase shifter (11), second amplifier (12) of series connection;
Between the coupled end of described the first coupler (1) and the first radio frequency amplifier (2), be disposed with first and singly turn Dual module (13) and the first negative delay unit (3), between the output of described the first negative delay unit (3) and the first radio frequency amplifier (2), be provided with first pair and turn single module (15); Between the straight-through end of described the 3rd coupler (5) and the second phase shifter (11), be disposed with second and singly turn Dual module (16) and the second negative delay unit (6), between the output of described the second negative delay unit (6) and the second phase shifter (11), be provided with second pair and turn single module (18);
Described the first negative delay unit (3) comprises the first metal-oxide-semiconductor in parallel, the second metal-oxide-semiconductor and the first branch road, the second branch road that by resistance, inductance, capacitances in series, form; The first metal-oxide-semiconductor, the second metal-oxide-semiconductor separately grid are connected respectively to first output and another output that singly turns Dual module (13), the first branch road, the second branch road one end by resistance side is separately as the output of the first negative delay unit (3), the first branch road, the second branch road other end ground connection;
Described the second negative delay unit (6) comprises the 3rd metal-oxide-semiconductor in parallel, the 4th metal-oxide-semiconductor and the 3rd branch road, the 4th branch road that by resistance, inductance, capacitances in series, form; The 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor separately grid are connected respectively to second output and another output that singly turns Dual module (16), the 3rd branch road, the 4th branch road one end by resistance side is separately as the output 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 metal-oxide-semiconductor source grounding separately in described the first negative delay unit (3), the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor source grounding separately in described the second negative delay unit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320859242.7U CN203775143U (en) | 2013-12-24 | 2013-12-24 | Feed-forward linear power amplifier for radio frequency communication |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320859242.7U CN203775143U (en) | 2013-12-24 | 2013-12-24 | Feed-forward linear power amplifier for radio frequency communication |
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| Publication Number | Publication Date |
|---|---|
| CN203775143U true CN203775143U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320859242.7U Withdrawn - After Issue CN203775143U (en) | 2013-12-24 | 2013-12-24 | Feed-forward linear power amplifier for radio frequency communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684273A (en) * | 2013-12-24 | 2014-03-26 | 昆山美博通讯科技有限公司 | Feed-forward linear power amplifier for radio frequency communication |
-
2013
- 2013-12-24 CN CN201320859242.7U patent/CN203775143U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684273A (en) * | 2013-12-24 | 2014-03-26 | 昆山美博通讯科技有限公司 | Feed-forward linear power amplifier for radio frequency communication |
| CN103684273B (en) * | 2013-12-24 | 2016-07-20 | 昆山美博通讯科技有限公司 | Feedforward linear power amplifier for radio-frequency communication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140813 Effective date of abandoning: 20160720 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |