CN203057073U - Small-sized Doherty circuit of wide-band - Google Patents
Small-sized Doherty circuit of wide-band Download PDFInfo
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- CN203057073U CN203057073U CN 201320001113 CN201320001113U CN203057073U CN 203057073 U CN203057073 U CN 203057073U CN 201320001113 CN201320001113 CN 201320001113 CN 201320001113 U CN201320001113 U CN 201320001113U CN 203057073 U CN203057073 U CN 203057073U
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Abstract
A small-sized Doherty circuit of a wide-band comprises an input end, an output end, an amplified circuit, and an impedance inverter circuit. The amplification circuit comprises a main amplification device and an auxiliary amplification device. An input end of the main amplification device and an input end of the auxiliary amplification device are both connected to the input end. An output end of the main amplification device and an output end of the auxiliary amplification device are both connected to the impedance inverter circuit. The output end of the main amplification device is further in series connection with a set of one-grade or multi-grade LC phase-shift network units. The input end of the auxiliary amplification device is in series connection with a second set of one-grade or multi-grade LC phase-shift network units. The output end of the auxiliary amplification device is in series connection with a third set of one-stage or multi-stage LC phase-shift network units. An equivalent circuit of a microstrip line is used as an LC structure, and the circuit structure is enabled to be suitable for a wide frequency range through selection of proper inductance and capacitance. The circuit is enabled to be suitable for a wide impedance range through combination of the microstrip line and the LC structure. Meanwhile, the inductance and the capacitance are changed flexibly to adapt to different power amplifier tubes, and therefore the size is reduced.
Description
Technical field
The utility model relates to communication technical field, relates in particular to a kind of doherty power amplifier of miniaturization of broadband.
Background technology
Current doherty power amplifier design mainly is to adopt microstrip line to realize that two key components are arranged in the circuit, and one is phase-shift network, and length is 1/4 λ, and two is little band compensating wire, and length is decided according to actual conditions.When circuit work frequency was low, the entire circuit system can be very huge, increased cost, and Gu Ding microstrip line is difficult simultaneously mates different power amplifiers, thereby causes consistency poor, will certainly reduce production efficiency and increase cost.
Summary of the invention
The purpose of this utility model is to solve prior art problems, at shared volume in the current conventional Doherty circuit product design more greatly and efficient aborning low, provide a kind of usefulness one or more levels LC phase-shift network, and cooperate microstrip line as required, be applicable to the doherty circuit of the miniaturization in broadband.
For reaching above-mentioned purpose, the utility model adopts following technical scheme:
A kind of doherty circuit of miniaturization of broadband, comprise: input 1, output 2, amplifying circuit 3, impedance inverter circuit 4, amplifying circuit 3 comprises a main amplifier spare 31 and a booster amplifier spare 32, the input of main amplifier spare 31 and booster amplifier spare 32 all is connected to input 1, output all is connected to impedance inverter circuit 4, the output of main amplifier spare 31 also is connected in series with first group of one or more levels LC phase-shift network unit 5, the input of booster amplifier spare 32 also is connected in series with second group of one or more levels LC phase-shift network unit 6, and the output of booster amplifier spare 32 also is connected in series with the 3rd group of one or more levels LC phase-shift network unit 7.
Described first group of one or more levels LC phase-shift network unit 5 comprises one or more LC phase-shift network unit that are connected in series, each LC phase-shift network unit comprises an inductance 51 and the ground capacity 52 that is connected inductance 51 1 ends, one end of inductance 51 is connected to the output of main amplifier spare 31, is connected to capacitance terminal and is connected to impedance inverter circuit 4.
Described second group of one or more levels LC phase-shift network unit 6 comprises one or more LC phase-shift network unit that are connected in series, each LC phase-shift network unit comprises an inductance 61 and the electric capacity 62 that connects the ground connection of inductance one end, one end of inductance is connected to input 1, is connected to the input that capacitance terminal is connected to booster amplifier spare 32.
Described the 3rd group of one or more levels LC phase-shift network unit 7 comprises one or more LC phase-shift network unit that are connected in series, the ground capacity 72 that each LC phase-shift network unit comprises inductance 71 and is connected inductance one end, one end of inductance 71 is connected to the output of booster amplifier spare 32, is connected to capacitance terminal and is connected to impedance inverter circuit 4.
Described impedance inverter circuit 4 is made up of microstrip line.
The output of described main amplifier spare 31 and booster amplifier spare 32 connects an impedance converter unit 8 in addition respectively.
Described impedance converter unit 8 is made up of microstrip line.
Adopt technique scheme, the utility model utilizes the equivalent electric circuit of microstrip line to be the LC structure, thereby by selecting appropriate inductance, electric capacity to make this circuit be suitable for wider frequency range; By microstrip line and the combination of LC structure, make this circuit can adapt to wideer impedance ranges; Can be by commutation inductance, capacitance adapt to the purpose that different power tubes reaches the minimizing volume and enhances productivity and reduce cost flexibly.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes a part of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not constitute improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the utility model embodiment one;
Fig. 2 is the structural representation of the utility model embodiment two;
Fig. 3 is the real LC phase-shift network of the utility model cellular construction schematic diagram.
Embodiment
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer, clear, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Be enforcement illustration of the present utility model as shown in Figure 1-Figure 3.When power amplifier output impedance presents perception, as Fig. 1, comprise input 1, output 2, amplifying circuit 3 and impedance inverter circuit 4, amplifying circuit comprises a main amplifier spare 31 and a booster amplifier spare 32, the input of main amplifier spare 31 and booster amplifier spare 32 all is connected to input 1, output all is connected to impedance inverter circuit 4, the output of main amplifier spare 31 also is connected in series with one or more levels LC phase-shift network unit 5, the ground capacity 52 that LC phase-shift network unit 5 comprises inductance 51 and is connected inductance 51 1 ends, one end of inductance 51 is connected to the output of main amplifier spare 31, is connected to capacitance terminal and is connected to impedance inverter circuit 4; The input of booster amplifier spare 32 also is connected in series with one or more levels LC phase-shift network unit 6, LC phase-shift network unit 6 comprises an inductance 61 and the electric capacity 62 that connects the ground connection of inductance 61 1 ends, one end of inductance 61 is connected to input 1, is connected to the input that capacitance terminal is connected to booster amplifier spare 32; The output of booster amplifier spare 32 also is connected in series with one or more levels LC phase-shift network unit 7, the ground capacity 72 that LC phase-shift network unit 7 comprises inductance 71 and is connected inductance 71 1 ends, one end of inductance 71 is connected to the output of booster amplifier spare 32, is connected to capacitance terminal and is connected to impedance inverter circuit 4; Impedance inverter circuit 4 can be made up of microstrip line, the fixedly microstrip line of for example fixedly microstrip line of 1/4 wavelength of one section 35 Ω, or multistage 1/4 wavelength.Inductance in the LC phase- shift network unit 5,6,7, capacitance require to calculate according to operating frequency and phase shift variation, inductance in the LC phase-shift network unit 5, capacitance also need consider to close the equivalent electric circuit part that little band compensating wire is exported on the road, and inductance, the capacitance in the LC phase-shift network unit 7 is to calculate according to closing the equivalent electric circuit of exporting little band compensating wire in the road.According to output impedance characteristic and the phase shift variations of power amplifier, this phase- shift network unit 5,6,7 can be made up of one or more LC phase-shift networks unit.
When power amplifier output impedance presents capacitive, as Fig. 2, a kind of miniaturization Doherty circuit of broadband, comprise input 1, output 2, amplifying circuit 3 and impedance inverter circuit 4, amplifying circuit comprises a main amplifier 31 and a booster amplifier 32, the input of main amplifier 31 and booster amplifier 32 all is connected to input 1, output all is connected to impedance inverter circuit 4, the output of main amplifier 31 also is connected in series with one section impedance converter unit 8 (for microstrip line or other similar components and parts), one or more levels LC phase-shift network unit 5, the ground capacity 52 that LC phase-shift network unit 5 comprises inductance 51 and is connected inductance 51 1 ends, one end of inductance 51 is connected to the impedance converter unit 8 of the output of main amplifier 31, is connected to capacitance terminal and is connected to impedance inverter circuit 4; The input of booster amplifier 32 also is connected in series with one or more levels LC phase-shift network unit 6, LC phase-shift network unit 6 comprises an inductance 61 and the electric capacity 62 that connects the ground connection of inductance 61 1 ends, one end of inductance 61 is connected to input 1, is connected to the input that capacitance terminal is connected to booster amplifier 32; The output of booster amplifier 32 also is connected in series with one section impedance converter unit 8 (for microstrip line or other similar components and parts), one or more levels LC phase-shift network unit 7, the ground capacity 72 that LC phase-shift network unit 7 comprises inductance 71 and is connected inductance 71 1 ends, one end of inductance 71 is connected to the impedance converter unit 8 of the output of booster amplifier 32, is connected to capacitance terminal and is connected to impedance inverter circuit 4; Impedance inverter circuit 4 can be made up of microstrip line, the fixedly microstrip line of for example fixedly microstrip line of 1/4 wavelength of one section 35 Ω, or multistage 1/4 wavelength.Inductance in the LC phase- shift network unit 5,6, capacitance require to calculate according to operating frequency and phase shift variation, inductance in the LC phase-shift network unit 5, capacitance also need consider to close the equivalent electric circuit part that little band compensating wire is exported on the road, and inductance, the capacitance in the LC phase-shift network unit 7 is to calculate according to closing the equivalent electric circuit of exporting little band compensating wire in the road.According to output impedance characteristic and the phase shift variations of power amplifier, this phase- shift network unit 5,6,7 can be made up of one or more LC phase-shift networks unit, and microstrip line 8 act as the impedance conversion, and its size is determined according to operating frequency and impedance transformed value.
Benefit of the present utility model is: utilize the equivalent electric circuit of microstrip line to be the LC structure, thus wideer by selecting appropriate inductance, capacitance to make this circuit structure be suitable for frequency; By microstrip line and the combination of LC structure, make this structure can adapt to wideer impedance ranges; Can adapt to different power tubes by commutation inductance, capacitance flexibly reaches and reduces volume and enhance productivity and reduce cost.
Above-mentioned explanation illustrates and has described preferred embodiment of the present utility model, as previously mentioned, be to be understood that the utility model is not limited to the disclosed form of this paper, should not regard the eliminating to other embodiment as, and can be used for various other combinations, modification and environment, and can in invention contemplated scope described herein, change by technology or the knowledge of above-mentioned instruction or association area.And the change that those skilled in the art carry out and variation do not break away from spirit and scope of the present utility model, then all should be in the protection range of the utility model claims.
Claims (8)
1. the doherty circuit of the miniaturization in a broadband, it is characterized in that: comprising: input (1), output (2), amplifying circuit (3), impedance inverter circuit (4), amplifying circuit (3) comprises a main amplifier spare (31) and a booster amplifier spare (32), the input of main amplifier spare (31) and booster amplifier spare (32) all is connected to input (1), output all is connected to impedance inverter circuit (4), the output of main amplifier spare (31) also is connected in series with first group of one or more levels LC phase-shift network unit (5), the input of booster amplifier spare (32) also is connected in series with second group of one or more levels LC phase-shift network unit (6), and the output of booster amplifier spare (32) also is connected in series with the 3rd group of one or more levels LC phase-shift network unit (7).
2. the doherty circuit of the miniaturization in a kind of broadband as claimed in claim 1, it is characterized in that: described first group of one or more levels LC phase-shift network unit (5) comprises one or more LC phase-shift network unit that are connected in series, the ground capacity (52) that each LC phase-shift network unit comprises an inductance (51) and is connected inductance (51) one ends, one end of inductance (51) is connected to the output of main amplifier spare (31), is connected to capacitance terminal and is connected to impedance inverter circuit (4).
3. the doherty circuit of the miniaturization in a kind of broadband as claimed in claim 1, it is characterized in that: described second group of one or more levels LC phase-shift network unit (6) comprises one or more LC phase-shift network unit that are connected in series, each LC phase-shift network unit comprises an inductance (61) and the electric capacity (62) that connects the ground connection of inductance one end, one end of inductance is connected to input (1), is connected to the input that capacitance terminal is connected to booster amplifier spare (32).
4. the doherty circuit of the miniaturization in a kind of broadband as claimed in claim 1, it is characterized in that: described the 3rd group of one or more levels LC phase-shift network unit (7) comprises one or more LC phase-shift network unit that are connected in series, the ground capacity (72) that each LC phase-shift network unit comprises inductance (71) and is connected inductance one end, one end of inductance (71) is connected to the output of booster amplifier spare (32), is connected to capacitance terminal and is connected to impedance inverter circuit (4).
5. as the doherty circuit of the miniaturization in claim 1,2,2 or 4 described a kind of broadbands, it is characterized in that: described impedance inverter circuit (4) is made up of microstrip line.
6. as the doherty circuit of the miniaturization in claim 1,2,3 or 4 described a kind of broadbands, it is characterized in that: the output of described main amplifier spare (31) and booster amplifier spare (32) connects an impedance converter unit (8) in addition respectively.
7. the doherty circuit of the miniaturization in a kind of broadband as claimed in claim 5 is characterized in that: the output of described main amplifier spare (31) and booster amplifier spare (32) connects an impedance converter unit (8) in addition respectively.
8. the doherty circuit of the miniaturization in a kind of broadband as claimed in claim 6, it is characterized in that: described impedance converter unit (8) is made up of microstrip line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001113 CN203057073U (en) | 2013-01-04 | 2013-01-04 | Small-sized Doherty circuit of wide-band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001113 CN203057073U (en) | 2013-01-04 | 2013-01-04 | Small-sized Doherty circuit of wide-band |
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| Publication Number | Publication Date |
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| CN203057073U true CN203057073U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320001113 Expired - Lifetime CN203057073U (en) | 2013-01-04 | 2013-01-04 | Small-sized Doherty circuit of wide-band |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107493081A (en) * | 2017-06-27 | 2017-12-19 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Use the Doherty power amplifier of the compound left/right hand transmission line lifting bandwidth of broadband type |
-
2013
- 2013-01-04 CN CN 201320001113 patent/CN203057073U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107493081A (en) * | 2017-06-27 | 2017-12-19 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Use the Doherty power amplifier of the compound left/right hand transmission line lifting bandwidth of broadband type |
| CN107493081B (en) * | 2017-06-27 | 2020-08-18 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Doherty power amplifier for improving bandwidth by using broadband type composite left/right-handed transmission line |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 361000 room 526, Pioneer Building, pioneer zone, torch hi tech Zone, Huli District, Xiamen, Fujian, Xiamen Patentee after: Xiamen Leixunke Microelectronics Co.,Ltd. Address before: 361000 room 526, Pioneer Building, pioneer zone, torch hi tech Zone, Huli District, Xiamen, Fujian, Xiamen Patentee before: XIAMEN CREOTECH ELECTRONIC TECHNOLOGY Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20130710 |
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| CX01 | Expiry of patent term |