CN102013544A - Double-frequency Wilkinson power divider - Google Patents
Double-frequency Wilkinson power divider Download PDFInfo
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- CN102013544A CN102013544A CN2010102138126A CN201010213812A CN102013544A CN 102013544 A CN102013544 A CN 102013544A CN 2010102138126 A CN2010102138126 A CN 2010102138126A CN 201010213812 A CN201010213812 A CN 201010213812A CN 102013544 A CN102013544 A CN 102013544A
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Abstract
The invention discloses a double-frequency Wilkinson power divider. Impedance conversion is realized by using two sections of transmission lines, and the characteristic impedances of the two sections of transmission lines are respectively Z1 and Z2; an isolating resistor R is arranged between two output ports, the two output ports are respectively connected with one segment of open-circuit microstrip line in parallel, and the characteristic impedance of the open-circuit microstrip line is Z3. The isolation degree is increased by respectively connecting the two output ports with one segment of open-circuit microstrip line, and the required impedance is accurately realized by using the open-circuit microstrip lines. The invention has the advantages of small size and double-frequency operation; the required impedance is accurately realized by using the open-circuit microstrip lines, the analytical design formula of the double-frequency power divider is deducted by using odd-even mode analysis and double-frequency analysis, and the design is accurate; the power divider working in any two or more than two frequency ranges not only effectively reduces circuit size, but also reduces insertion loss and improves noise characteristics.
Description
Technical field
The present invention relates to the power splitter in a kind of microwave communication, particularly a kind of double frequency Wilkinson power splitter.
Background technology
At global system for mobile communications (Global system formobilecommunications, GSM), global positioning system (Globalposi-tioning system, GPS) etc. in the Modern Communication System, in order to make full use of frequency spectrum resource and to improve signal transmission rate, the application of double frequency and multifrequency telecommunication circuit is more prevalent.Power splitter is one of communication system critical component, but traditional Wilkinson power splitter can only be operated in specified frequency or its odd harmonic place.
Summary of the invention
Technical problem to be solved by this invention is that the double frequency Wilkinson power splitter that a kind of volume is little, utilization open circuit microstrip line is accurately realized impedance will be provided.
In order to solve above technical problem, the invention provides a kind of double frequency Wilkinson power splitter, adopt two joint transmission lines to realize impedance conversion, the characteristic impedance of two joint transmission lines is respectively Z1, Z2; Between two output ports isolation resistance R is arranged, at two output ports, one section open circuit microstrip line in parallel respectively, its characteristic impedance is Z3.The present invention has improved isolation in the method for output port one section open circuit microstrip line in parallel respectively, utilizes the open circuit microstrip line accurately to realize required reactance.
Superior effect of the present invention is:
1) volume is small and exquisite;
2) two-frequency operation;
3) utilize the open circuit microstrip line accurately to realize required reactance, use strange-even mould analysis and double frequency analytical derivation to go out the parsing design formula of this dual-frequency power divider, therefore design accurately;
4) the power splitter spare of working simultaneously in two or more frequency ranges arbitrarily not only effectively reduces the circuit volume, and reduces Insertion Loss, improves noise characteristic.
Description of drawings
Fig. 1 is a schematic circuit block diagram of the present invention;
Fig. 2 is the strange moding circuit that cutaway view 1 circuit obtains;
Fig. 3 is the even moding circuit that cutaway view 1 circuit obtains;
Fig. 4 is a domain of the present invention.
Embodiment
Example with the operating frequency double frequency Wilkinson microstrip power divider that is 2.0GHz and 42GHz specifies the present invention.
The double frequency Wilkinson microstrip power divider that it is 2.0GHz and 4.2GHz that the present invention adopts an operating frequency adopts two joint transmission lines to realize impedance conversion.The characteristic impedance of two sections transmission lines is respectively Z1, Z2, and corresponding length is l1, l2; Be isolation resistance R between two output ports 2 and 3, and at output port place difference one section open circuit microstrip line in parallel, its characteristic impedance is Z3, length is l3.Two operating frequencies are respectively f1, f2 (f2=m f1, m are the arithmetic number greater than 1).The employing dielectric constant is 4.4 FR-4 dielectric-slab, and its thickness is 1.0mm.According to above-mentioned parameter, final double frequency Wilkinson microstrip power divider object construction of making is of a size of 27mm * 37mm.
The present invention adopts very-even mould analysis and double frequency analysis, derives circuit parameter of the present invention, is respectively described below:
When 1) strange mould is analyzed,, can cut the circuit of Fig. 1 open acquisition strange moding circuit as shown in Figure 2 according to the symmetry of circuit.Wherein: β 1 is the propagation constant of frequency transmission line when being f1, and β 1l is its electrical degree under this frequency.
According to classics strange-even mould analysis result, the sufficient and necessary condition that the Wilkinson power splitter has good power delivery, coupling and isolation characteristic simultaneously is that its strange mould input impedance, even mould input impedance equate with port Impedance.In view of the above, the designing requirement that need satisfy of the novel power divider that this paper proposed is as follows:
1/ZO＝1/ZB+1/ZC+2/R (1)
ZA＝jZ1tan?β1l (2)
ZB＝Z2(ZA+jZ2tan?β1l)/(Z2+jZAtan?β1l) (3)
ZC＝Z3/(jtan?β1l3) (4)
With formula (2), (3), (4) substitution formula (1), adopt the method arrangement of real part and imaginary part correspondent equal to obtain following two equatioies
R＝2ZO (5)
Z2-Z1tan2β1l(Z1+Z2)tanβ1l＝Z2tan?β1l3Z3 (6)
When 2) even mould was analyzed, even mould input impedance as shown in Figure 3.Employing is analyzed similar thinking with strange mould and is derived following two equatioies
2z20z21+[z21(z1+z2)2-4z20z1(z1+2z2)]tan21l+
2z20(2z22-z21)tan4β1l＝0 (7)
(z1+z2)[z1z2(z1-4z20)+(4z20z2-z31)tan2β1l]·
tanβ1l/{z1[z1(z1+z2)2-8z2z20tan2β1l]+
4z20(z21+z22tan4β1l)}＝z2tanβ1l3/z3 (8)
Equate and to obtain by formula (6) and formula (8)
4Z20Z1Z2(Z1-Z2tan2β1l)(1+tan2β1l)2＝0 (9)
And then release
Z1＝Z2tan2β1l (10)
And formula (10) is distinguished substitution formula (6) and formula (7) again, can obtain the two sections transmission lines of binodal impedance transformer and characteristic impedance and its electrical length of the microstrip line of opening a way and satisfy following relational expression
Z1＝2ZOtan?β1l (11)
Z2＝2ZO/tan?β1l (12)
Z3＝2ZOtanβ1l3/(1-tan2β1l) (13)
2 double frequency analyses
For the dual-frequency power divider that can work in two different frequencies simultaneously, should set up simultaneously two frequencies with the result of GrandTech-even mould analysis, then must have as can be known according to formula (10)
tan2mβ1l＝tan2β1l (14)
Just
mβ1l±β1l＝nπ (15)
In the formula: n is an arbitrary integer.Calculate for convenience, might as well get "+" and n=1, obtain equation
β1l＝π/(1+m) (16)
In like manner, formula (13) also should be set up when frequency equals f1 and f2 respectively simultaneously, so
β1l3＝pπ/(1+m) (17)
In the formula: p is an arbitrary integer.In addition, can do further discussion to choosing of open circuit microstrip line electrical degree by formula (13):
(1) when 1＜m＜3, tan β 1l＞1.For the characteristic impedance that guarantees the open circuit microstrip line for just, tan β 1l3＜0 must be arranged.Can choose p=2, so have
β1l3＝2π/(1+m) (18)
(2) when m＞3, tan β 1l＜1, tan β 1l3＞0.In order to shorten the length of required open circuit microstrip line as far as possible, can choose p=1, so have
βl＝π/(1+m) (19)
3) design in kind
The present invention adopts the said method design and has developed a double frequency Wilkinson microstrip power divider that operating frequency is 2.0GHz and 4.2GHz.Can calculate required circuit parameter according to formula (5), (11), (12), (13), (16) and (18): R=100 Ω, β 1l1=β 1l2=β 1l=π/3.1, β 1l3=2 π/3.1, Z1=113.44 Ω, Z2=44.07 Ω, Z3=91.89 Ω.The employing dielectric constant is 4.4 FR-4 dielectric-slab, and its thickness is 1.0mm.According to above-mentioned parameter, final double frequency Wilkinson microstrip power divider physical dimension of making is 27mm * 37mm.
Measured result can draw, and the return loss of each port and isolation all are better than 15dB in the scope of frequency 1.9～2.1GHz and 4.1～4.3GHz; Near 2.0GHz and 4.2GHz transmission attenuation is respectively 3.5dB and 3.8dB.Transmission attenuation is slightly bigger than normal, and what adopt mainly due to this circuit is common pcb board material and electroplating surfaces with tin microstrip line, can solve by adopting better pcb board material and surface gold-plating.
Claims (1)
1. double frequency Wilkinson power splitter is characterized in that: adopt two joint transmission lines to realize impedance conversions, the characteristic impedances of two joint transmission lines are respectively Z1, Z2; Between two output ports isolation resistance R is arranged, at two output ports, one section open circuit microstrip line in parallel respectively, its characteristic impedance is Z3.
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| CN2010102138126A CN102013544A (en) | 2010-06-30 | 2010-06-30 | Double-frequency Wilkinson power divider |
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| CN2010102138126A CN102013544A (en) | 2010-06-30 | 2010-06-30 | Double-frequency Wilkinson power divider |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022616A (en) * | 2012-12-14 | 2013-04-03 | 四川九洲电器集团有限责任公司 | Double-frequency four-way power divider based on low temperature co-fired ceramic technology |
| CN103050758A (en) * | 2013-01-31 | 2013-04-17 | 成都赛纳赛德科技有限公司 | I-type five-port E-surface power divider |
| CN103050757A (en) * | 2013-01-31 | 2013-04-17 | 成都赛纳赛德科技有限公司 | I-type five-port H-surface power divider |
| CN103078163A (en) * | 2013-01-31 | 2013-05-01 | 成都赛纳赛德科技有限公司 | Pi type five-port H-plane power divider |
| CN104022334A (en) * | 2014-06-11 | 2014-09-03 | 南京航空航天大学 | Microwave four-frequency power divider |
| CN106329053A (en) * | 2015-06-23 | 2017-01-11 | 南京理工大学 | Dual-frequency Wilkinson power divider |
| CN106876855A (en) * | 2015-12-11 | 2017-06-20 | 中国航空工业集团公司雷华电子技术研究所 | A kind of Mini Microstrip broadband work(clutch |
| WO2018218995A1 (en) * | 2017-05-27 | 2018-12-06 | 深圳市华讯方舟微电子科技有限公司 | Single-section wilkinson power divider |
| CN114335958A (en) * | 2021-11-25 | 2022-04-12 | 南京国睿防务系统有限公司 | Low-power-consumption transformation method of 1/4 power divider |
| CN114899571A (en) * | 2022-05-18 | 2022-08-12 | 西北核技术研究所 | Novel high-power Wilkinson synthesizer |
| CN116014401A (en) * | 2022-12-21 | 2023-04-25 | 苏州华太电子技术股份有限公司 | Improved Wilkinson power divider and Doherty amplifier |
-
2010
- 2010-06-30 CN CN2010102138126A patent/CN102013544A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022616A (en) * | 2012-12-14 | 2013-04-03 | 四川九洲电器集团有限责任公司 | Double-frequency four-way power divider based on low temperature co-fired ceramic technology |
| CN103022616B (en) * | 2012-12-14 | 2016-07-20 | 四川九洲电器集团有限责任公司 | Double frequency No. four power divider based on LTCC Technology |
| CN103050758A (en) * | 2013-01-31 | 2013-04-17 | 成都赛纳赛德科技有限公司 | I-type five-port E-surface power divider |
| CN103050757A (en) * | 2013-01-31 | 2013-04-17 | 成都赛纳赛德科技有限公司 | I-type five-port H-surface power divider |
| CN103078163A (en) * | 2013-01-31 | 2013-05-01 | 成都赛纳赛德科技有限公司 | Pi type five-port H-plane power divider |
| CN103078163B (en) * | 2013-01-31 | 2015-02-11 | 成都赛纳赛德科技有限公司 | Pi type five-port H-plane power divider |
| CN104022334A (en) * | 2014-06-11 | 2014-09-03 | 南京航空航天大学 | Microwave four-frequency power divider |
| CN106329053A (en) * | 2015-06-23 | 2017-01-11 | 南京理工大学 | Dual-frequency Wilkinson power divider |
| CN106876855A (en) * | 2015-12-11 | 2017-06-20 | 中国航空工业集团公司雷华电子技术研究所 | A kind of Mini Microstrip broadband work(clutch |
| WO2018218995A1 (en) * | 2017-05-27 | 2018-12-06 | 深圳市华讯方舟微电子科技有限公司 | Single-section wilkinson power divider |
| CN114335958A (en) * | 2021-11-25 | 2022-04-12 | 南京国睿防务系统有限公司 | Low-power-consumption transformation method of 1/4 power divider |
| CN114335958B (en) * | 2021-11-25 | 2023-05-05 | 南京国睿防务系统有限公司 | Low-power-consumption transformation method of 1/4 power divider |
| CN114899571A (en) * | 2022-05-18 | 2022-08-12 | 西北核技术研究所 | Novel high-power Wilkinson synthesizer |
| CN114899571B (en) * | 2022-05-18 | 2024-05-14 | 西北核技术研究所 | Novel high-power Wilkinson synthesizer |
| CN116014401A (en) * | 2022-12-21 | 2023-04-25 | 苏州华太电子技术股份有限公司 | Improved Wilkinson power divider and Doherty amplifier |
| CN116014401B (en) * | 2022-12-21 | 2023-11-14 | 苏州华太电子技术股份有限公司 | Improved Wilkinson power divider and Doherty amplifier |
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Application publication date: 20110413 |