CN204392185U - A kind of Doherty of miniaturization closes road circuit - Google Patents
A kind of Doherty of miniaturization closes road circuit Download PDFInfo
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- CN204392185U CN204392185U CN201420860692.2U CN201420860692U CN204392185U CN 204392185 U CN204392185 U CN 204392185U CN 201420860692 U CN201420860692 U CN 201420860692U CN 204392185 U CN204392185 U CN 204392185U
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- microstrip line
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- power amplifier
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Abstract
The Doherty that the utility model relates to a kind of miniaturization closes road circuit, comprises power divider, main power amplifier module, its peak work amplification module, two sections of λ/4,50 Ω microstrip line TL
1, TL
2, one section of λ/8,50 Ω microstrip line TL
3with a microwave capacitors Cap, an output P of described power divider
1be connected to the input of main power amplifier module, another output of power divider P
2be connected to λ/4,50 Ω microstrip line TL
1input, microstrip line TL
1output be connected to the input of its peak work amplification module, the output of main power amplifier module is connected to λ/4,50 Ω microstrip line TL
2, microstrip line TL
2output and the output of its peak work amplification module be connected to λ/8,50 Ω microstrip line TL
3input, and at microstrip line TL
3output a microwave capacitors Cap in parallel with it is set, microwave capacitors Cap one end connects microstrip line TL
3, other end ground connection.
Description
Technical field
The utility model belongs to mobile communication technology field, and especially a kind of Doherty of miniaturization closes road circuit.
Background technology
In a wireless communication system, radio-frequency power amplifier is the Primary Component of whole transmission of wireless signals, and its effect is power conversion DC power supply provided is that RF power is gone out.The efficiency of power amplifier module is one of most important parameter weighing power amplifier properties.Efficiency power amplifier is defined as the ratio of radio frequency power output and direct current supply power.High efficiency power amplifier can reduce power amplifier working temperature, reduces energy consumption, reduce system radiating requirement etc.
At present, in our mobile communication product, have higher requirement to power amplifier, one of most important index is exactly that efficiency wants high.The method improving efficiency power amplifier mainly contains Doherty and ET etc.Have benefited from the fast development of DPD technology, the power amplifier of Doherty framework becomes the technology of most main flow, and this framework power combing must adopt an impedance transformer, has usually all been come (TL4 in Fig. 1) by λ/4 wavelength line.But for low-frequency range (such as RO4350 sheet material, during 400MHz, its length is about 108mm), its length has badly influenced the area of whole link, this has just become the miniaturized topmost obstacle of module.
Summary of the invention
The purpose of this utility model is the deficiency overcoming prior art existence, and provide a kind of Doherty of miniaturization to close road circuit, λ/4,35 Ω wave microstrip lines are substituted by electric capacity Cap and section λ/8,50 Ω microstrip lines, the half by its length reduction, realizes the miniaturization of whole module.
The purpose of this utility model has been come by following technical solution.The Doherty of this miniaturization closes road circuit, comprises power divider, main power amplifier module, its peak work amplification module, two sections of λ/4,50 Ω microstrip line TL
1, TL
2, one section of λ/8,50 Ω microstrip line TL
3with a microwave capacitors Cap, an output P of described power divider
1be connected to the input of main power amplifier module, another output of power divider P
2be connected to λ/4,50 Ω microstrip line TL
1input, microstrip line TL
1output be connected to the input of its peak work amplification module, the output of main power amplifier module is connected to λ/4,50 Ω microstrip line TL
2, microstrip line TL
2output and the output of its peak work amplification module be connected to λ/8,50 Ω microstrip line TL
3input, and at microstrip line TL
3output a microwave capacitors Cap in parallel with it is set, microwave capacitors Cap one end connects microstrip line TL
3, other end ground connection.
As preferably, described main power amplifier module and λ/4,50 Ω microstrip line TL
2the circuit at place and λ/4,50 Ω microstrip line TL
1, its peak work amplification module place circuit be shape in parallel.
As preferably, the capacitance of described microwave capacitors Cap is 5.3 ± 0.5pF for the capacitance of 400MHz frequency range Cap, and the capacitance for 900MHz frequency range Cap is 2pF, and the capacitance for the Cap of 2GHz frequency range is 0.8 ± 0.3pF.
The beneficial effects of the utility model are: substitute λ/4,35 Ω wave microstrip lines by electric capacity Cap and section λ/8,50 Ω microstrip lines, the half by its length reduction, realize the miniaturization of whole module, and the size of closing road circuit can be reduced greatly, cost-saving.
Accompanying drawing explanation
Fig. 1 is that traditional Doherty closes road electrical block diagram.
Fig. 2 is that Doherty of the present utility model closes road electrical block diagram.
Fig. 3 is that the size comparison that the utility model and traditional Doherty close road circuit schemes.
Embodiment
Do detailed introduction below in conjunction with accompanying drawing to the utility model: as shown in Figure 1, it is that traditional Doherty closes road circuit, as shown in Figure 2, utilizes λ/8,50 Ω microstrip line TL
3with the microwave capacitors Cap in parallel with it (high Q electric capacity Cap) substitutes traditional Doherty and closes λ/4 on the circuit of road, 35 Ω wave microstrip line TL
4.Doherty closes road circuit and comprises power divider, main power amplifier module, its peak work amplification module, two sections of λ/4,50 Ω microstrip line TL
1, TL
2, one section of λ/8,50 Ω microstrip line TL
3with a microwave capacitors Cap, an output P of described power divider
1be connected to the input of main power amplifier module, another output of power divider P
2be connected to λ/4,50 Ω microstrip line TL
1input, microstrip line TL
1output be connected to the input of its peak work amplification module, the output of main power amplifier module is connected to λ/4,50 Ω microstrip line TL
2, microstrip line TL
2output and the output of its peak work amplification module be connected to λ/8,50 Ω microstrip line TL
3input, and at microstrip line TL
3output a microwave capacitors Cap in parallel with it is set, microwave capacitors Cap one end connects microstrip line TL
3, other end ground connection.
Wherein, the capacitance of microwave capacitors Cap is 5.3 ± 0.5pF for the capacitance of 400MHz frequency range Cap, and the capacitance for 900MHz frequency range Cap is 2pF, and the capacitance for the Cap about 2GHz frequency range is 0.8 ± 0.3pF.
As shown in Figure 3, the utility model can reduce the size of closing road circuit greatly, thus cost-saving.
The utility model is not limited to above-mentioned execution mode; no matter do any change on its shape or material are formed; every employing structural design provided by the utility model, is all one distortion of the present utility model, all should thinks within the utility model protection range.
Claims (3)
1. miniaturized Doherty closes a road circuit, it is characterized in that: comprise power divider, main power amplifier module, its peak work amplification module, two sections of λ/4,50 Ω microstrip line TL
1, TL
2, one section of λ/8,50 Ω microstrip line TL
3with a microwave capacitors Cap, an output P of described power divider
1be connected to the input of main power amplifier module, another output of power divider P
2be connected to λ/4,50 Ω microstrip line TL
1input, microstrip line TL
1output be connected to the input of its peak work amplification module, the output of main power amplifier module is connected to λ/4,50 Ω microstrip line TL
2, microstrip line TL
2output and the output of its peak work amplification module be connected to λ/8,50 Ω microstrip line TL
3input, and at microstrip line TL
3output a microwave capacitors Cap in parallel with it is set, microwave capacitors Cap one end connects microstrip line TL
3, other end ground connection.
2. the Doherty of miniaturization according to claim 1 closes road circuit, it is characterized in that: described main power amplifier module and λ/4,50 Ω microstrip line TL
2the circuit at place and λ/4,50 Ω microstrip line TL
1, its peak work amplification module place circuit be shape in parallel.
3. the Doherty of miniaturization according to claim 1 closes road circuit, it is characterized in that: the capacitance of described microwave capacitors Cap is 5.3 ± 0.5pF for the capacitance of 400MHz frequency range Cap, capacitance for 900MHz frequency range Cap is 2pF, and the capacitance for the Cap of 2GHz frequency range is 0.8 ± 0.3pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860692.2U CN204392185U (en) | 2014-12-30 | 2014-12-30 | A kind of Doherty of miniaturization closes road circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860692.2U CN204392185U (en) | 2014-12-30 | 2014-12-30 | A kind of Doherty of miniaturization closes road circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204392185U true CN204392185U (en) | 2015-06-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420860692.2U Active CN204392185U (en) | 2014-12-30 | 2014-12-30 | A kind of Doherty of miniaturization closes road circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204392185U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634724A (en) * | 2016-07-18 | 2018-01-26 | 普天信息技术有限公司 | A kind of Doherty power amplifier |
-
2014
- 2014-12-30 CN CN201420860692.2U patent/CN204392185U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634724A (en) * | 2016-07-18 | 2018-01-26 | 普天信息技术有限公司 | A kind of Doherty power amplifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |