CN106602201B - Power distributor - Google Patents
Power distributor Download PDFInfo
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- CN106602201B CN106602201B CN201611178429.5A CN201611178429A CN106602201B CN 106602201 B CN106602201 B CN 106602201B CN 201611178429 A CN201611178429 A CN 201611178429A CN 106602201 B CN106602201 B CN 106602201B
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- microstrip
- line
- section
- impedance line
- microstrip impedance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
Abstract
The invention provides a power divider meeting the requirement of the existing ultra-wideband communication system, which comprises two groups of micro-strip impedance lines sharing one input port, and is characterized in that: the microstrip impedance line comprises a first section of microstrip impedance line and a second section of microstrip impedance line, a first isolation resistor is connected between the first section of microstrip impedance line and the second section of microstrip impedance line, and a microstrip line unit is connected to the first section of microstrip impedance line in parallel. The invention solves the defects of large loss, large actual size, narrow working bandwidth and the like of the conventional power divider.
Description
Technical Field
The invention belongs to the technical field of ultra-wideband mobile communication, and particularly relates to a power divider.
Background
The existing ultra-wideband technology is a new high-efficiency communication mode, can relieve the problem of crowded frequency resources, and is gradually used in new-generation wireless communication technologies such as WLAN (wireless local area network), GPS (global positioning system) and the like. The power divider is a commonly used passive module in a communication system, the traditional power divider for equally dividing power mainly comprises a plurality of impedance lines with quarter wavelength, a resistance terminal is arranged at a node of each section of impedance line, the more the used nodes are, the more the isolation resistance is, and correspondingly, the wider bandwidth and the better isolation degree can be obtained. However, an increase in resistance increases parasitic loss, and an increase in the number of nodes increases the size of the element. Therefore, the performance of the whole system is affected by the problems of narrow working bandwidth, large size, high loss and the like of the existing power divider.
Disclosure of Invention
The invention provides a power divider meeting the requirements of the existing ultra-wideband communication system, and overcomes the defects of large loss, large actual size, narrow working bandwidth and the like of the existing power divider.
The technical solution of the invention is as follows: the invention relates to a power divider, which comprises two groups of microstrip impedance lines sharing an input port, and is characterized in that: the microstrip impedance line comprises a first section of microstrip impedance line and a second section of microstrip impedance line, a first isolation resistor is connected between the first section of microstrip impedance line and the second section of microstrip impedance line, and a microstrip line unit is connected to the first section of microstrip impedance line in parallel.
The microstrip line unit is fan-shaped.
The microstrip impedance line also comprises a gradually-changed microstrip line from thin to wide, the gradually-changed microstrip line is connected with an output port of the second section of microstrip impedance line, and a second isolation resistor is connected between the second section of microstrip impedance line and the gradually-changed microstrip line.
The widths of the first section of microstrip impedance line and the second section of microstrip impedance line are as follows in sequence: 1.1mm, 1.7 mm.
The width of the narrow side of the gradient microstrip line is 1.7mm, and the width of the wide side of the gradient microstrip line is 2.6 mm.
The width of the interface part of the fan-shaped microstrip line unit and the first section of microstrip impedance line is 1mm, the radius is 1.6mm, and the radian is 70.
The two groups of microstrip impedance lines are integrated on the dielectric substrate.
The dielectric substrate had a dielectric constant of 2.65, a sheet thickness of 1mm and a copper foil thickness of 1 ounce.
The invention has the following advantages:
1. the microstrip line unit is connected in parallel to the first section of microstrip impedance line, so that the number of sections is greatly reduced, and the bandwidth is widened. The reduction of the number of the nodes reduces the number of the isolation resistors, reduces parasitic loss caused by excessive resistance and greatly reduces the size of the whole module.
2. The shape of the parallel microstrip line unit is designed into a sector shape, and the parallel microstrip line unit is shorter than the short branch section of the traditional microstrip line, so that the structural size of the whole module is further reduced; the contact size of the fan-shaped structure with the first section of microstrip impedance line is narrower than that of the traditional rectangular stub, so that the loss caused by discontinuity generated by wider size of the connection part is reduced, and the insertion loss of the device is further improved.
3. The gradually-changed microstrip line between the second section of microstrip impedance line and the output port is equivalent to an impedance converter, the impedance formed by the whole structure is converted into 50 ohms, and the good matching of elements and other devices in a system is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of a sector microstrip line unit according to the present invention;
FIG. 3 is a simulation result of the present invention in simulation software after a sector microstrip line unit is added;
fig. 4 shows the values of return loss S11 of the vector net test of the present invention.
The reference numerals are explained below:
1-an input port; 2-a first section of microstrip impedance line; 3-a first isolation resistor; 4-second section microstrip impedance line; 5-a graded microstrip line; 6-a first output port; 7-microstrip line element; 8-a second isolation resistor; 9-second output port.
Detailed Description
Referring to fig. 1, the structure of the embodiment of the present invention is a two-section halving power divider. The microstrip impedance line comprises two groups of microstrip impedance lines sharing one input port 1, the microstrip impedance lines comprise a first section of microstrip impedance line 2, a second section of microstrip impedance line 4 and a gradually-changed microstrip line 5, a first isolation resistor 3 is connected between the first section of microstrip impedance line 2 and the second section of microstrip impedance line 4, a microstrip line unit 7 is connected to the first section of microstrip impedance line 2 in parallel, and the microstrip line unit 7 is in a sector shape. The gradual change microstrip line 5 is connected with an output port of the second section of microstrip impedance line 4, and a second isolation resistor 8 is connected between the second section of microstrip impedance line 4 and the gradual change microstrip line 5. The widths of the first section of microstrip impedance line 2 and the second section of microstrip impedance line 4 are as follows in sequence: 1.1mm, 1.7 mm. The width of the narrow side of the gradient microstrip line 5 is 1.7mm, and the width of the wide side is 2.6 mm. The width of the interface part of the fan-shaped microstrip line unit 7 and the first section of microstrip impedance line 2 is 1mm, the radius is 1.6mm, and the radian is 70. Two groups of microstrip impedance lines are integrated on the dielectric substrate. The dielectric substrate had a dielectric constant of 2.65, a sheet thickness of 1mm, and a copper foil thickness of 1 ounce.
The signal to be equally divided is input from the input port 1, and the power output through the first output port 6 and the first output port 9 is the equally divided and halved signal. The characteristic impedance Z0 for the three ports is 50 ohms each. The characteristic impedances of the first microstrip impedance line 2 are Z02 and Z03, and the characteristic impedances of the second microstrip impedance line 4 are Z022 and Z033. The values of Z02, Z03, Z022, and Z033 can be estimated to be 70.7 ohms, 84 ohms, respectively, based on theoretical knowledge. The resistance values of the two isolation resistors 3 and 8 are 100 ohms and 200 ohms respectively. The width of the microstrip line is related to the length and the impedance value thereof, and the width of the microstrip impedance line at the port can be calculated to be 2.739mm according to a small calculation tool in ADS software. The width and the length of the first section of microstrip impedance line 2 are respectively 1.1mm and 5.2mm, and the width and the length of the second section of microstrip impedance line 4 are respectively 1.7mm and 5.1 mm.
Referring to fig. 2, a fan-shaped microstrip line unit 7 is connected in parallel to a first section of microstrip impedance line 2, and a fan-shaped angle is 70 degrees through calculation of an estimation formula and combination of a large number of simulations, wherein the width of the contact part with the first section of microstrip impedance line 2 is 1mm, and the radius of the contact part is 1.6 mm. The use of the fan-shaped structure widens the operating bandwidth of the whole module, reduces the whole size of the device and improves the insertion loss of the device. In addition, a section of gradually-changed microstrip line 5 is additionally arranged between the first section of microstrip impedance line 2 and the first output port 6 and used for improving the matching of the circuit, the width of the narrow end of the gradually-changed microstrip line 5 is 1.7mm, the width of the wide end of the gradually-changed microstrip line is 2.6mm, and the length of the gradually-changed microstrip line is 6.7 mm. Software simulation shows that the influence of changing Wi and Angle values on the circuit is not obvious, which shows that when the sector unit is applied for design, the circuit can be improved only by considering the radius of the sector unit.
Referring to fig. 3, it can be seen from the results that the return loss of the two output ports 6 and 9 in 1GHz-17.5GHz of the invention is less than-10 dB, indicating that the performance is good.
Referring to FIG. 4, it can be seen from the measured results that the return loss S11 of the invention is less than-20 dB in the range of 2GHz-18 GHz.
Claims (6)
1. A power divider comprises two groups of microstrip impedance lines which share one input port, and is characterized in that: the microstrip impedance line comprises a first section of microstrip impedance line and a second section of microstrip impedance line, a first isolation resistor is connected between the first section of microstrip impedance line and the second section of microstrip impedance line, and a microstrip line unit is connected to the first section of microstrip impedance line in parallel; the microstrip line unit is fan-shaped;
the width of the fan-shaped microstrip line unit and the interface part of the first section of microstrip impedance line is 1mm, the radius is 1.6mm, and the radian is 70.
2. The power splitter of claim 1, wherein: the microstrip impedance line also comprises a gradually-changed microstrip line from thin to wide, the gradually-changed microstrip line is connected with an output port of the second section of microstrip impedance line, and a second isolation resistor is connected between the second section of microstrip impedance line and the gradually-changed microstrip line.
3. The power splitter of claim 2, wherein: the widths of the first section of microstrip impedance line and the second section of microstrip impedance line are as follows in sequence: 1.1mm, 1.7 mm.
4. The power splitter of claim 2, wherein: the width of the narrow side of the gradient microstrip line is 1.7mm, and the width of the wide side of the gradient microstrip line is 2.6 mm.
5. A power divider as claimed in any one of claims 1 to 4, wherein: the two groups of microstrip impedance lines are integrated on the dielectric substrate.
6. The power splitter of claim 5, wherein: the dielectric substrate had a dielectric constant of 2.65, a sheet thickness of 1mm, and a copper foil thickness of 1 ounce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611178429.5A CN106602201B (en) | 2016-12-19 | 2016-12-19 | Power distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611178429.5A CN106602201B (en) | 2016-12-19 | 2016-12-19 | Power distributor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106602201A CN106602201A (en) | 2017-04-26 |
| CN106602201B true CN106602201B (en) | 2022-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611178429.5A Active CN106602201B (en) | 2016-12-19 | 2016-12-19 | Power distributor |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2707244C1 (en) * | 2019-05-27 | 2019-11-25 | Акционерное общество "Научно-производственная фирма "Микран" | Ultra-wideband stripline power divider |
| CN110137653B (en) * | 2019-05-31 | 2021-05-28 | 佳木斯大学 | Low-insertion-loss Wilkinson power divider |
| CN113451722B (en) * | 2021-06-29 | 2022-03-11 | 南京智能高端装备产业研究院有限公司 | Three-passband power division filter based on microstrip coupling line |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324613A (en) * | 2011-07-18 | 2012-01-18 | 北京瑞德艾迪科技有限公司 | Power divider, electronic device, radio frequency front-end device and power dividing method |
| CN102956948A (en) * | 2011-08-29 | 2013-03-06 | 黄森 | Novel ultra wide band Wilkinson power divider |
| CN104022334A (en) * | 2014-06-11 | 2014-09-03 | 南京航空航天大学 | Microwave four-frequency power divider |
| CN205488450U (en) * | 2015-12-15 | 2016-08-17 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Rectifier circuit with bandpass characteristics |
| CN206401485U (en) * | 2016-12-19 | 2017-08-11 | 西安易朴通讯技术有限公司 | A kind of power divider |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6470930B2 (en) * | 2014-09-16 | 2019-02-13 | 日本ピラー工業株式会社 | Distributor and planar antenna |
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2016
- 2016-12-19 CN CN201611178429.5A patent/CN106602201B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324613A (en) * | 2011-07-18 | 2012-01-18 | 北京瑞德艾迪科技有限公司 | Power divider, electronic device, radio frequency front-end device and power dividing method |
| CN102956948A (en) * | 2011-08-29 | 2013-03-06 | 黄森 | Novel ultra wide band Wilkinson power divider |
| CN104022334A (en) * | 2014-06-11 | 2014-09-03 | 南京航空航天大学 | Microwave four-frequency power divider |
| CN205488450U (en) * | 2015-12-15 | 2016-08-17 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Rectifier circuit with bandpass characteristics |
| CN206401485U (en) * | 2016-12-19 | 2017-08-11 | 西安易朴通讯技术有限公司 | A kind of power divider |
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| CN106602201A (en) | 2017-04-26 |
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