CN101938029B - Power splitter with high isolation - Google Patents
Power splitter with high isolation Download PDFInfo
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- CN101938029B CN101938029B CN 200910148703 CN200910148703A CN101938029B CN 101938029 B CN101938029 B CN 101938029B CN 200910148703 CN200910148703 CN 200910148703 CN 200910148703 A CN200910148703 A CN 200910148703A CN 101938029 B CN101938029 B CN 101938029B
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Abstract
The invention relates to a power splitter with high isolation. The power splitter comprises a substrate, a first shunt arm, a second shunt arm, a signal input unit, a connecting unit, a ground plane and a slit slot, wherein the signal input unit is used for receiving an input signal and distributing the input signal to the first shunt arm and the second shunt arm; the ground plane is used for providing grounding; the first shunt arm, the second shunt arm, the signal input unit and the connecting unit are distributed on the first surface of the substrate, and form a first area in a surrounding mode; the ground plane is distributed on a second surface of the substrate; the slit slot is formed in the ground plane, and at least part of the slit slot is formed in a second area corresponding to the first area. The power splitter of the invention has an excellent high isolation characteristic without using additional resistor components, greatly saves the manufacturing cost, can be suitable for high frequency bands effectively, and can meet the requirements for power distribution.
Description
Technical field
The present invention relates to a kind of power divider of tool high-isolation, relate in particular to a kind of resistance that need not use and also have the power divider of high isolation characteristic.
Background technology
Power divider often is used in the microwave circuit, is used for input signal power is dispensed in each assembly.Tradition one-to-two power divider commonly used has two kinds of Wilkinson power divider (Wilkinson power divider) and T-shaped power dividers (T-junction power divider) etc.The difference of these two kinds of power dividers is that mainly the Wilkinson power divider needs an extra resistor to promote isolation usually, and T-shaped power divider then is not need extra resistor, but its isolation is then relatively relatively poor.
Please refer to Fig. 1, Fig. 1 is the schematic diagram of a known Wilkinson power divider 10.Wilkinson power divider 10 includes an input port 102, shunt port one 04,106 and a resistor 108.In general, the resistance value of resistor 108 is generally the twice of input port 102.For instance, the resistance value of input port 102 is Zo, and the resistance value of port one 04,106 is Zo along separate routes, and the resistance value of resistor 108 then is 2Zo.Wilkinson power divider 10 can be inputted a microwave input signal SI by input port 102, and via two microwave output signal SO1 of shunt port one 04,106 output, SO2 is to output port 110,112.Yet, because general resistor has the restriction of frequency of operation usually, when Weir Er Jinsen power divider 10 used general resistor at high frequency more, the parasitic capacitance that inter-module produces and inductive effect can be more obvious, and make the characteristic electron variation of Wilkinson distribution of work device 10.Please refer to Fig. 2, Fig. 2 is known Weir Er Jinsen power divider 10 uses ideal resistance when high frequency analog response oscillogram.Wherein, input port 102 is the 1st port, and output port 110 is the 2nd port, and output port 112 is the 3rd port, and resistor 108 is to realize with 100 ohm ideal resistance.By the analog result of Fig. 2 as can be known, although Weir Er Jinsen power divider 10 has used the ideal resistance of resistive better (namely having removed the stray inductance effect), S23 isolation parameter is still not satisfactory, only about-8dB.That is to say that even if change resistor 108 into ideal resistance, still can't provide desirable isolation, hence one can see that.Wilkinson power divider 10 is not suitable for high frequency really.
In addition, when the frequency of Wilkinson power divider 10 operation is more and more higher, quarter-wave long shunt port one 04,106 can size becomes less along with the rising of frequency of operation, take the substrate that uses RO4233 (dielectric coefficient is as 3.33) as example, when operating in the Ka frequency range, the length of port one 04,106 is only about about 2.4mm, thus along separate routes, because two minutes road ports distance to each other is too short, will cause great coupling effect.In the case, even use ideal resistance, still can't reach effective isolation characteristic.
In brief, in the known technology, though use T-shaped power divider need not use extra resistor, but can't obtain suitable isolation, though and the isolation characteristic that uses Weir Er Jinsen power divider can acquire a certain degree during than low frequency in frequency of operation, but must increase expensive resistor cost, and when frequency of operation is higher, still can't provide effective isolation.
Summary of the invention
Therefore, main purpose of the present invention namely is to provide a kind of power divider of tool high-isolation.
The present invention discloses a kind of power divider of tool high-isolation, and this power divider includes a substrate, and this substrate includes a first surface and a second surface; One first shunt arm is distributed on this first surface of this substrate, and this first shunt arm includes a first end and one second end; One second shunt arm is distributed on this first surface of this substrate, and this second shunt arm includes a first end and one second end; One signal input unit, be distributed on this first surface of this substrate, and be coupled to this first end of this first shunt arm and this first end of this second shunt arm, be used for receiving an input signal and this input signal is dispensed to this first shunt arm and this second shunt arm; One linkage unit is distributed on this first surface of this substrate, and is coupled to this second end of this first shunt arm and this second end of this second shunt arm, and wherein this linkage unit, this first shunt arm and this second shunt arm are around a first area; One ground plane is distributed on this second surface of this substrate, is used to provide ground connection; And a slit groove, be formed in this ground plane; Wherein this slit groove of at least a portion is formed in the second area with respect to this first area.
Power divider of the present invention need not use extra resistor assembly, and can possess excellent high-isolation characteristic, can save significantly manufacturing cost, the more important thing is, power divider of the present invention can effectively be applicable to high-frequency band, improved the shortcoming that effective isolation can't be provided when the conventional power distributor operates in high frequency in the past, to satisfy the demand of power division.
Description of drawings
Fig. 1 is the schematic diagram of a known Wilkinson power divider.
Fig. 2 is known Weir Er Jinsen power divider uses ideal resistance when high frequency analog response oscillogram.
Fig. 3 is the upper viewing view of a power divider of the embodiment of the invention.
Fig. 4 is the lower planar view of a power divider of the embodiment of the invention.
Fig. 5 is the three-dimensional structure diagram of a power divider of the embodiment of the invention.
Fig. 6 is the analog response oscillogram of the power divider of a tool rectangular slot groove.
Fig. 7 is the three-dimensional structure diagram of the power divider of the trapezoidal slit groove of a tool.
Fig. 8 is the analog response oscillogram of the power divider of the trapezoidal slit groove of tool.
Fig. 9 is that the length of side of the short bottom surface of slit groove among Fig. 7 is to the comparison schematic diagram of resonance frequency.
Figure 10 is that the length of side of the long bottom surface of slit groove among Fig. 7 is to the comparison schematic diagram of resonance frequency.
Figure 11 is the analog response oscillogram that the power divider of the embodiment of the invention operates in the Ka frequency range.
The primary clustering symbol description:
10 Wilkinson power dividers
102 input ports
104 minutes road ports
108 resistors
30 power dividers
302 substrates
304 first shunt arm
306 second shunt arm
308 signal input unit
310 linkage units
312 ground planes
314 slit grooves
316 first signal output units
318 secondary signal output units
The A first area
A ' second area
The SI input signal
SO1, SO2 output signal
Embodiment
Please refer to Fig. 3 to Fig. 5, Fig. 3 is the upper viewing view of a power divider 30 of the embodiment of the invention, and Fig. 4 is the lower planar view of power divider 30, and Fig. 5 is the three-dimensional structure diagram of power divider 30.Power divider 30 includes a substrate 302, one first shunt arm 304, one second shunt arm 306, single 308, one linkage unit 310 of signal input, a ground plane 312, a slit groove (slit) 314, a first signal output unit 316 and a secondary signal output unit 318.Substrate 302 includes a upper surface and a lower surface relative with upper surface, wherein the first shunt arm 304, the second shunt arm 306, signal input unit 308, linkage unit 310, first signal output unit 316 and secondary signal output unit 318 are laid in upper surface, and ground plane 312 and slit groove 314 are laid in lower surface.Preferably, the first shunt arm 304, the second shunt arm 306, signal input unit 308 and linkage unit 310 can a microstrip transmission line structure be realized.As shown in Figure 3, a first end 306A of a first end 304A of the first shunt arm 304 and the second shunt arm 306 can be coupled to signal input unit 308.Therefore, signal input unit 308 can be dispensed to an input signal SI the first shunt arm 304 and the second shunt arm 306, sends out output signal SO1, SO2 by its corresponding first signal output unit 316 and secondary signal output unit 318 respectively again.Linkage unit 310 is coupled to one second end 304B of the first shunt arm 304 and one second end 306B of the second shunt arm 306.306 of linkage unit 310, the first shunt arm 304 and the second shunt arm around the zone be a first area A.And the zone that includes in order to the ground plane 312 that ground connection is provided with respect to first area A is a second area A '.In other words, second area A ' is that first area A orthographic projection is in the block scope of ground plane 312.In the case, slit groove 314 can be formed in the ground plane 312, and has at least the slit groove 314 of a part to be formed in the scope of second area A '.
Be compared to traditional Wilkinson power divider and improve the respectively isolation between shunt with resistor assembly, in embodiments of the present invention, power divider 30 uses traditional Wilkinson power divider the position of resistor assembly to replace with linkage unit 310, and utilizes slit groove 314 to produce resistance value.Theory with microstrip transmission line illustrates, microstrip transmission line can an equivalent RLGC circuit, and namely inductance and the resistance of series connection are added electric capacity and the electricity of two parallel connections and led.Usually inductance value mainly is that length with microstrip line itself becomes, and capacitance then is to be produced by microstrip line and ground plane.When power divider 30 has increased slit groove 314, the ground plane that namely is equivalent to the below of microstrip line has increased the change of slit groove, thus, is equivalent to reduce the capacitance of this RLGC equivalent electric circuit.And in the loss-free microstrip line of ideal, its characteristic impedance equals
Therefore, when capacitance reduced, relatively the overall impedance value namely can improve.Therefore, power divider 30 of the present invention can reach the purpose of the resistor assembly in traditional Wilkinson power divider by the design of slit groove 314.
In simple terms, power divider 30 of the present invention can effectively arrive the purpose of high-isolation by the design of slit groove 314, thus, need not use extra resistor assembly, and just the radiofrequency signal with input is distributed into the homophase output signal that multichannel is isolated mutually.
For convenience of description, in the present embodiment, the analog result that proposes mainly is as basic framework take power divider 30, signal input unit 308 is made as the 1st port, first signal output unit 316 is made as the 2nd port, and secondary signal output unit 318 is made as the 3rd port, and calculates the S parameter with this.Fig. 6 is the analog response oscillogram of the power divider 30 of tool rectangular slot groove, and it is take embodiment shown in Figure 5 as framework, operates in the result who simulates between the Ku frequency range of 10.7GHz to 12.75GHz.As shown in Figure 6, the frequency range that S23 isolation parameter surpasses isolation benchmark-15dB reaches 0.39GHz, mean the characteristic that has high-isolation, and reflection coefficient S11 parameter also drops on-10dB near, numerical value is very little, represents that most energy all is transmitted away.
In the present embodiment, slit groove 314 is for being formed at the groove hole in the ground plane 312, and the trough body structure that it can any shape realizes that for instance, to shown in Figure 5, slit groove 314 is the narrow and long rectangular groove body type such as Fig. 3.As shown in Figure 7, slit groove 314 is a trapezoidal cell body.Wherein the short bottom surface of slit groove 314 is respectively S and L with the length of side of long bottom surface, and the short bottom surface portions of slit groove 314 is positioned at second area A '.Please continue with reference to figure 8, Fig. 8 is the analog response oscillogram of the power divider 30 of the trapezoidal slit groove of tool, and it is take embodiment shown in Figure 7 as framework, operates in the result who simulates between the Ku frequency range of 10.7GHz to 12.75GHz.As shown in Figure 8, S23 isolation parameter surpasses the frequency range of isolation benchmark-15dB greater than 4.5GHz, and reflection coefficient S11 parameter in whole frequency range all less than-15dB.In other words, power divider 30 of the present invention possesses the characteristic of extremely excellent high-isolation and has very little reflection loss.Please refer to Fig. 9 and Figure 10, Fig. 9 is that the length of side S of the short bottom surface of slit groove 314 among Fig. 7 is to the comparison schematic diagram of resonance frequency.Figure 10 is that the length of side L of the long bottom surface of slit groove 314 among Fig. 7 is to the comparison schematic diagram of resonance frequency.Transverse axis represents length of side length, and the longitudinal axis represents resonance frequency.By Fig. 9 and Figure 10 as can be known, when the length of side of short bottom surface or long bottom surface shorter, the more past low frequency skew of the resonance frequency of S23 isolation parameter, S11 and S22 reflection coefficient parameter are then towards high frequency offset.In other words, when using trapezoidal slit groove, can come by the length of side that changes its short bottom surface or long bottom surface the resonance frequency of Modulating Power distributor 30.
As described in prior art, tradition Wilkinson power divider must use resistor between two shunt arm, along with frequency of operation is higher, ghost effect and electromagnetic coupling effect can be more serious, thereby when causing the Wilkinson power divider to operate in high-frequency band, can't reach effective isolation and cause characteristic electron not good.Under comparing, design of the present invention need not use resistor, and more can be applicable to high-frequency band.For instance, please refer to Figure 11, Figure 11 is the analog response oscillogram that embodiment of the invention power divider 30 operates in the Ka frequency range, and it is take embodiment shown in Figure 7 as framework, operates in the result who simulates between the Ka frequency range of 18.2GHz to 20.2GHz.As shown in figure 11, between the frequency range of 18.2GHz to 20.2GHz, S23 isolation parameter all is lower than-18dB.Be compared to the analog result of traditional Wilkinson power divider among Fig. 2, the embodiment of the invention has promoted at least effect of 10dB aspect isolation.And reflection coefficient S11 and S22 also all fall within-10dB under, that is have few reflection loss.Therefore, power divider of the present invention can forgo traditional Wilkinson power divider shortcoming and be used in higher frequency.
On the other hand, as the function of known power divider, power divider of the present invention is except being distributed into the radiofrequency signal of input the homophase output signal that multichannel isolates mutually; In like manner, with power divider reverse operating of the present invention, also be about to signal and input to the first shunt arm 304 and the second shunt arm 306 by first signal output unit 316 and secondary signal output unit 318 respectively, combine output by will the flow through in-phase signal of the first shunt arm 304 and the second shunt arm 306 of signal input unit 308, just become a power combiner.In other words, but power divider bidirectional operation of the present invention, except being used for power division, the also reverse rate of doing work usefulness of synthesizing.
Should be noted that power divider 30 only is embodiments of the invention, those skilled in the art are when doing according to this different modifications.For instance, power divider 30 can be applicable to various signal frequency ranges, for example Ka-Ku frequency range.Slit groove 314 can etching mode or other modes are formed at ground plane 312.Substrate 302 can be any microwave base plate, for example the RO4233 microwave base plate.In general, the ratio of the length of the first shunt arm 304 and the second shunt arm 306 or the visual power division of width or other any demands are changed.For instance, if want to make the signal through distributing to have more conforming phase place, then the first shunt arm 304 can be designed to the identical shunt arm of length with the second shunt arm 306.If when the first shunt arm 304 and the second shunt arm 306 are designed to different in width, then can reach the purpose that unequal power distributes.In addition, the length of shunt arm can be designed to quarter-wave or quarter-wave odd-multiple, the effect of distributing to obtain constant power.
Generally speaking, be compared to traditional Wilkinson power divider, power divider of the present invention need not use extra resistor assembly, and can possess excellent high-isolation characteristic, can save significantly manufacturing cost, the more important thing is, power divider of the present invention can effectively be applicable to high-frequency band, improved the shortcoming that effective isolation can't be provided when the conventional power distributor operates in high frequency in the past, to satisfy the demand of power division.
The above only is preferred embodiment of the present invention, and all equivalent variations and modifications of doing according to the present patent application claim all should belong within the scope that the present invention contains.
Claims (14)
1. the power divider of a tool high-isolation comprises:
One substrate comprises a first surface and a second surface;
One first shunt arm is distributed on the described first surface of described substrate, and described the first shunt arm comprises a first end and one second end;
One second shunt arm is distributed on the described first surface of described substrate, and described the second shunt arm comprises a first end and one second end;
One signal input unit, be distributed on the described first surface of described substrate, and be coupled to the described first end of described the first shunt arm and the described first end of described the second shunt arm, be used for receiving an input signal and described input signal is dispensed to described the first shunt arm and described the second shunt arm;
One linkage unit, be distributed on the described first surface of described substrate, and being coupled to described second end of described the first shunt arm and described second end of described the second shunt arm, wherein said linkage unit, described the first shunt arm and described the second shunt arm are around a first area;
One ground plane is distributed on the described second surface of described substrate, is used to provide ground connection; And
One slit groove is formed in the described ground plane;
Wherein the described slit groove of at least a portion is formed in the second area with respect to described first area.
2. power divider as claimed in claim 1, also comprise a first signal output unit, be laid on the described first surface of described substrate, and be coupled to described second end of described the first shunt arm, be used for exporting the described input signal via described the first shunt arm; And a secondary signal output unit, be laid on the described first surface of described substrate, and be coupled to described second end of described the second shunt arm, be used for exporting the described input signal via described the second shunt arm.
3. power divider as claimed in claim 1, wherein said slit groove is a rectangle cell body.
4. power divider as claimed in claim 3, wherein said slit groove is a narrow and long rectangular cell body.
5. power divider as claimed in claim 1, wherein said slit groove is a trapezoidal cell body.
6. power divider as claimed in claim 5, the short bottom surface portions of wherein said slit groove is positioned at described second area.
7. power divider as claimed in claim 5, the short bottom surface of wherein said slit groove and the length of side of long bottom surface are relevant to the resonance frequency of described power divider.
8. power divider as claimed in claim 1, wherein said slit groove is to be formed at described ground plane with etching mode.
9. power divider as claimed in claim 1, wherein said second area is that the orthographic projection of described first area is in the zone of described ground plane.
10. power divider as claimed in claim 1, wherein said the first shunt arm, described the second shunt arm, described signal input unit and described linkage unit are a microstrip transmission line structure.
11. power divider as claimed in claim 1, wherein said substrate are the microwave base plate of a RO4233.
12. power divider as claimed in claim 1, wherein said power divider operate in a Ku microwave frequency band.
13. power divider as claimed in claim 1, wherein said power divider operate in a Ka microwave frequency band.
14. power divider as claimed in claim 1, wherein said the first shunt arm is identical with the length of the second shunt arm.
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| CN 200910148703 CN101938029B (en) | 2009-06-30 | 2009-06-30 | Power splitter with high isolation |
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| CN 200910148703 CN101938029B (en) | 2009-06-30 | 2009-06-30 | Power splitter with high isolation |
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| CN101938029A CN101938029A (en) | 2011-01-05 |
| CN101938029B true CN101938029B (en) | 2013-03-27 |
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Families Citing this family (6)
| 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 |
| CN105655679B (en) * | 2016-01-12 | 2019-04-09 | 电子科技大学 | A kind of directrix plane high isolation multi-path power divider |
| KR101631690B1 (en) * | 2016-01-27 | 2016-06-20 | (주)엑소더스커뮤니케이션스 | Power Divider/Combiner for high power having an improved isolation characteristic |
| CN113659309A (en) * | 2020-05-12 | 2021-11-16 | 西安电子科技大学 | Antenna device and electronic apparatus |
| WO2021227813A1 (en) * | 2020-05-12 | 2021-11-18 | 西安电子科技大学 | Antenna apparatus and electronic device |
| CN113794040A (en) * | 2021-10-11 | 2021-12-14 | 北京聚利科技有限公司 | Power divider |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3815055A (en) * | 1973-04-20 | 1974-06-04 | Raytheon Co | Microwave power divider |
| CN1825688A (en) * | 2006-02-13 | 2006-08-30 | 华南理工大学 | Microwave power distributor with multiple power distributing ratios |
| US7164903B1 (en) * | 2003-06-10 | 2007-01-16 | Smiths Interconnect Microwave Components, Inc. | Integrated N-way Wilkinson power divider/combiner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5097233A (en) * | 1990-12-20 | 1992-03-17 | Hughes Aircraft Company | Coplanar 3dB quadrature coupler |
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2009
- 2009-06-30 CN CN 200910148703 patent/CN101938029B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3815055A (en) * | 1973-04-20 | 1974-06-04 | Raytheon Co | Microwave power divider |
| US7164903B1 (en) * | 2003-06-10 | 2007-01-16 | Smiths Interconnect Microwave Components, Inc. | Integrated N-way Wilkinson power divider/combiner |
| CN1825688A (en) * | 2006-02-13 | 2006-08-30 | 华南理工大学 | Microwave power distributor with multiple power distributing ratios |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平4292002A 1992.10.16 |
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