CN101976754A - Tri-band Wilkinson power distributor - Google Patents
Tri-band Wilkinson power distributor Download PDFInfo
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- CN101976754A CN101976754A CN2010105299079A CN201010529907A CN101976754A CN 101976754 A CN101976754 A CN 101976754A CN 2010105299079 A CN2010105299079 A CN 2010105299079A CN 201010529907 A CN201010529907 A CN 201010529907A CN 101976754 A CN101976754 A CN 101976754A
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Abstract
The invention discloses a tri-band Wilkinson power distributor. The distributor comprises a dual-frequency Wilkinson power distributor, wherein three ports of the dual-frequency Wilkinson power distributor are provided with an impedance converter respectively; and the impedance converter is used for realizing operation of the tri-band Wilkinson power distributor. The distributor of the invention can realize the operation of the tri-band Wilkinson power distributor, has the advantages of low cost, simple structure and the like, and can work under three controllable frequency bands to fulfill the requirement of multi-frequency work of modern wireless communication.
Description
Technical field
The present invention relates to the frequency microwave technical field, relate in particular to a kind of three frequency band Wilkinson power dividers.
Background technology
Wilkinson (Wilkinson) power divider is a kind of important passive device in the microwave radio circuit, function with power division or power combination, it is widely used in the radio circuits such as balanced power amplifier, balanced mixer and aerial array.Along with the aggravation of the fast development of the communication technology and communications industry competition, new requirement has been proposed also for the performance of Wilkinson power divider.
Traditional Wilkinson power divider is to utilize the impedance transformation characteristic of quarter-wave transmission line to realize, can only be operated in single frequency range and odd harmonic place thereof, traditional Wilkinson power divider can not satisfy the requirement in double frequency, multifrequency and the broadband of Modern wireless communication far away.
And the Wilkinson power divider of the double frequency of using at present, it mainly is the port match characteristic when adopting two joint transmission line impedance converters to realize the excitation of power divider idol mould, but the port match characteristic when realizing the excitation of the strange mould of power divider must additionally add lamped element (as resistance, inductance and electric capacity); And the introducing of lamped element inductance and electric capacity can bring circuit inconvenience processing and make, and the shortcomings such as ghost effect during high-frequency work.Recent years, Park proposed to utilize the thinking design double frequency Wilkinson power divider of two joint coupling line impedance transformers, and the largest benefit of this design is exactly need not add extra inductance and electric capacity at output port.
At present, three frequency band Wilkinson power dividers utilize three joint transmission line impedance converters to realize, it has adopted three lamped elements (resistance) to realize port match and isolation characteristic in structure, form by three joint transmission line impedance converters and three isolation resistances, port match when three joint transmission line impedance converters can be realized the excitation of power divider idol mould, but the port match during can not the strict guarantee strange mould excitation of three isolation resistances that add, and the value of these 3 resistance changes along with different operating frequencies, increase difficulty to design, simultaneously, the introducing of a plurality of resistance is also corresponding has increased ghost effect.
Summary of the invention
The objective of the invention is to overcome traditional Wilkinson power divider and can only be operated in shortcomings such as single frequency range and odd harmonic place thereof, three frequency band Wilkinson power dividers are provided, the present invention can realize the work of three frequency band Wilkinson power dividers, have low, the advantages of simple structure and simple of cost, can under three controlled frequency ranges, work to satisfy the multiband job requirement of Modern wireless communication.
The present invention seeks to be achieved through the following technical solutions, three frequency band Wilkinson power dividers, comprise double frequency Wilkinson power divider, be separately installed with impedance transformer on three ports of described double frequency Wilkinson power divider, described impedance transformer is used to realize three work of Wilkinson power divider frequently.
To better implement the present invention, described impedance transformer is made up of double-frequency resonance device and transmission line, and described double frequency Wilkinson power divider is connected with the double-frequency resonance device by transmission line.
Described double frequency Wilkinson power divider is connected with the double-frequency resonance device by transmission line, specifically be meant, described transmission line is in parallel with the double-frequency resonance device, one port of described transmission line is connected with the port of double frequency Wilkinson power divider, and the another port of transmission line is as the port of three frequency band Wilkinson power dividers.
Described double-frequency resonance device is made up of open circuit minor matters line and short circuit minor matters line, wherein in the impedance transformer of three frequency band Wilkinson power divider output ports, and described open circuit minor matters line and short circuit minor matters line parallel, short circuit minor matters line is in parallel with transmission line; In the impedance transformer of three frequency band Wilkinson power divider input ports, described open circuit minor matters line is in parallel with transmission line, and short circuit minor matters line is in parallel with transmission line.
Described impedance transformer is made up of step electric impedance resonator and transmission line, and described double frequency Wilkinson power divider is connected with step electric impedance resonator by transmission line.
Described double frequency Wilkinson power divider is connected with step electric impedance resonator by transmission line, specifically be meant, described transmission line is in parallel with step electric impedance resonator, one port of described transmission line is connected with the port of double frequency Wilkinson power divider, and the another port of transmission line is as the port of three frequency band Wilkinson power dividers.
Described step electric impedance resonator is made up of second transmission line and the open circuit minor matters line of series connection, and second transmission line of described step electric impedance resonator is connected with transmission line.
The characteristic impedance of described transmission line is identical with the port Impedance of double frequency Wilkinson power divider.
Described transmission line is a microstrip transmission line.
Compared with prior art, the present invention has following beneficial effect:
1, realizes multifrequency, reduce cost: traditional Wilkinson power divider can only be operated in single frequency range and odd harmonic place thereof, and the present invention adds impedance transformer by the port at double frequency Wilkinson power divider, make power divider can be operated under three controlled frequency ranges, reduced the number of power demand distributor in the Multi-Frequency Signaling System, thereby reduced the circuit size of system, reduced production cost.
2, simple in structure: compare with the existing three band power distributors of three joint transmission line impedance converter design that utilize, have simplicity of design, do not need extra lamped element (inductance and electric capacity), there is the advantage of a plurality of transmission zeros outward in working frequency range.Port match characteristic when traditional three band power distributors that utilize three joint transmission line impedance converter design need three strange moulds of isolation resistances realization power divider to encourage, and the value of these three resistance changes and changes along with operating frequency; The present invention only needs an isolation resistance, and resistance value does not change with operating frequency.Traditional three band power dispenser designs of utilizing three joint transmission line impedance converters need complicated aggregative formula; And in the present invention, the parameter of power divider design can be determined by analytic expression is unique, does not need extra parameter optimization adjustment; Or owing to adopted open circuit short circuit minor matters line in the power divider, so the present invention can introduce transmission zero outside the power divider passband, suppress unwanted signal, is more suitable in the application of multi-frequency microwave communication system.
Description of drawings
Fig. 1 is the structural representation of three frequency band Wilkinson power dividers among the present invention;
Fig. 2 is the structural representation of middle impedance converter of the present invention;
Fig. 3 is the PCB cloth domain that is operated in 1/2.55/3GHz three frequency band Wilkinson power dividers among the embodiment one;
Fig. 4 is three frequency band Wilkinson power divider input return loss result schematic diagrams among the embodiment one;
Fig. 5 is three frequency band Wilkinson power divider output return loss result schematic diagrams among the embodiment one;
Fig. 6 is that three frequency band Wilkinson power dividers insert the loss result schematic diagram among the embodiment one;
Fig. 7 is the isolation result schematic diagram of three frequency band Wilkinson power dividers output among the embodiment one;
Fig. 8 is the PCB cloth domain of three frequency band Wilkinson power dividers among the embodiment two.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment one
One of present embodiment is operated in 1/2.55/3GH three frequency band Wilkinson power dividers, its structure as shown in Figure 1, comprise double frequency Wilkinson power divider, be separately installed with impedance transformer on three ports of described double frequency Wilkinson power divider, described impedance transformer is used to realize the input port coupling and the output port isolation of three frequency band Wilkinson power dividers.
As shown in Figure 2, described impedance transformer is made up of double-frequency resonance device and transmission line, and described double frequency Wilkinson power divider is connected with the double-frequency resonance device by transmission line.
As shown in Figure 3, the input of two sections transmission lines 10 is connected together, and between output, insert an isolation resistance 11 and form traditional single-frequency Wilkinson power divider, described double frequency Wilkinson power divider is to realize by port adding two sections open circuits minor matters lines 12 and two sections open circuit minor matters lines 13 in traditional single-frequency Wilkinson power divider structure.In order to make the circuit compactness, size is little, during actual design, with these transmission lines 10, open circuit minor matters line 12 and 13 bendings of open circuit minor matters line.The required impedance transformer of three frequency band Wilkinson power divider output ports (port 2 and port 3) is made up of transmission line 16, open circuit minor matters line 14 and short circuit minor matters line 15, one end of described transmission line 16 open circuit in parallel minor matters line 14, the minor matters of opening a way simultaneously line 14 and 15 parallel connections of short circuit minor matters line.Wherein Bing Lian open circuit minor matters line 14 and short circuit minor matters line 15 are equivalent to the double-frequency resonance device part in the output impedance transformer, one end of transmission line 16 connects the output port of described double frequency Wilkinson power divider, and the other end of transmission line 16 becomes and is the output port 2 of described three frequency band Wilkinson power dividers or output port 3.The input port 1 required impedance transformer of three frequency band Wilkinson power dividers is made up of transmission line 19, open circuit minor matters line 17 and short circuit minor matters line 18, described transmission line 19 is in parallel with open circuit minor matters line 17, described transmission line 19 is in parallel with short circuit minor matters line 18, the minor matters of wherein opening a way line 17 and short circuit minor matters line 18 are equivalent to the double-frequency resonance device part in the sending-end impedance converter, one end of transmission line 19 connects the output of double frequency Wilkinson power divider, and it is the input port 1 of three frequency band Wilkinson power dividers that the other end of transmission line 19 becomes.The end of short circuit minor matters line 15 and short circuit minor matters line 18 is respectively equipped with grounding through hole 20, and microstrip line links to each other with the floor by this grounding through hole 20 and forms short circuit.In order to reduce circuit size, open circuit minor matters line 17, open circuit minor matters line 14 and short circuit minor matters line 18 are bent equally.The value of isolation resistance 11 is defined as 2 times of three frequency band Wilkinson power divider port Impedance values, the characteristic impedance value of transmission line 10 is 1.85 times of three frequency band Wilkinson power divider port Impedance values, the resistance value of open circuit branch line 12 is 2.62 times of three frequency band Wilkinson power divider port Impedance values, the resistance value of open circuit branch line 13 is 2.62 times of three frequency band Wilkinson power divider port Impedance values, the resistance value of open circuit branch line 14 is 1.46 times of three frequency band Wilkinson power divider port Impedance values, the resistance value of short circuit branch line 15 is 1.03 times of three frequency band Wilkinson power divider port Impedance values, the characteristic impedance value of transmission line 16 is the same with three frequency band Wilkinson power divider port Impedance values, and the characteristic impedance value of transmission line 19 is the same with three frequency band Wilkinson power divider port Impedance values.When being operated in the centre frequency place of first frequency range and second frequency range, the electrical length of transmission line 10, open circuit branch line 12, open circuit branch line 14, open circuit minor matters line 17, short circuit minor matters line 15 and short circuit minor matters line 18 is 90 °, centre frequency place the 3rd frequency range, the electrical length of transmission line 16 is 70.3 °, and the electrical length of transmission line 19 is 40.4 °.
Described transmission line 16 and transmission line 19 are microstrip transmission line.
Above-mentioned three frequency band Wilkinson power divider input return loss result schematic diagrams, as shown in Figure 4, wherein solid line is the Electromagnetic Simulation result, dotted line is the circuit simulation result; Can clearly see among the figure near 1GHz, 2.55GHz and these three frequencies of 3GHz | S11| is less than-20dB, wherein | and S11| represents the amplitude of the reflection coefficient of port one.Three frequency band Wilkinson power dividers of present embodiment have been realized the input port coupling under these 3 frequency ranges.
Above-mentioned three frequency band Wilkinson power divider output return loss result schematic diagrams, as shown in Figure 5, wherein solid line is the Electromagnetic Simulation result, dotted line is the circuit simulation result; Can clearly see among the figure near 1GHz, 2.55GHz and these three frequencies of 3GHz | S22| is less than-20dB, wherein | and S22| represents the amplitude of the reflection coefficient of port 2.Three frequency band Wilkinson power dividers of present embodiment have been realized the output port coupling of power divider under these 3 frequency ranges.
Above-mentioned three frequency band Wilkinson power dividers insert the loss result schematic diagram, as shown in Figure 6, wherein solid line is the Electromagnetic Simulation result, dotted line is the circuit simulation result, (61) be a transmission zero at direct current place, (62) be a transmission zero between first working band and second working frequency range, (63) are a transmission zero at the 3rd the high stopband of working frequency range place; Can clearly see among the figure near 1GHz, 2.55GHz and these three frequencies of 3GHz | S21| is about-3dB, wherein | and S21| represents the amplitude of port one to the transmission coefficient of port 2.Three frequency band Wilkinson power dividers of present embodiment have been realized the constant power output of power divider under these 3 frequency ranges.See (61) among the figure, (62) and (63) these transmission zeros, signal can not be transferred to output from input at these 3 frequency places, can be suppressed at this 3 frequency place unwanted signals by these transmission zeros.
The isolation result schematic diagram of above-mentioned three frequency band Wilkinson power dividers output, as shown in Figure 7, wherein solid line is the Electromagnetic Simulation result, dotted line is the circuit simulation result, can clearly see among the figure near 1GHz, 2.55GHz and these three frequencies of 3GHz | S32| is about-20dB, wherein | and S32| represents the amplitude of port 2 to the transmission coefficient of port 3.Three frequency band Wilkinson power dividers of present embodiment have been realized the output port isolation under these 3 frequency ranges.
Embodiment two
A kind of three frequency band Wilkinson power dividers, its structure as shown in Figure 8, comprise double frequency Wilkinson power divider, be separately installed with impedance transformer on three ports of described double frequency Wilkinson power divider, described impedance transformer is used to realize the input port coupling and the output port isolation of three frequency band Wilkinson power dividers.
Described impedance transformer is made up of step electric impedance resonator (SIR, Step Impedance Resonator) and transmission line, and described double frequency Wilkinson power divider is connected with step electric impedance resonator by transmission line.
As shown in Figure 8, the input of two sections transmission lines 10 is connected together, and between output, inserts an isolation resistance 11 and form traditional single-frequency Wilkinson power divider.Double frequency Wilkinson power divider is to add two sections open circuit minor matters lines 12 and 13 realizations of two sections open circuit minor matters lines by the port in traditional single-frequency Wilkinson power divider structure.In order to make the circuit compactness, size is little, during actual design, with these transmission lines 10, open circuit minor matters line 12 and 13 bendings of open circuit minor matters line.The impedance transformer of described three frequency band Wilkinson power divider output ports (output port 2 and output port 3) is by transmission line 16, second transmission line 26 and open circuit minor matters line 27 are formed, described transmission line 16 and 26 parallel connections of second transmission line, second transmission line 26 and 27 series connection of open circuit minor matters line, wherein second transmission line 26 and open circuit minor matters line 27 have constituted step electric impedance resonator, one end of transmission line 16 connects the output port of described double frequency Wilkinson power divider, and it is the output port 2 or the output port 3 of three frequency band Wilkinson power dividers that the another port of transmission line 16 becomes.The input port 1 required impedance transformer of three frequency band Wilkinson power dividers is made up of transmission line 19, second transmission line 29 and open circuit minor matters line 30, described transmission line 19 and 29 parallel connections of second transmission line, second transmission line 29 and 30 series connection of open circuit minor matters line, wherein second transmission line 29 and open circuit minor matters line 30 have constituted step electric impedance resonator, one end of transmission line 19 connects the output port of described double frequency Wilkinson power divider, and the other end of transmission line 19 becomes the input port 1 for described three frequency band Wilkinson power dividers.In order to reduce circuit size, second transmission line 26, second transmission line 29 are bent.
The characteristic impedance of described transmission line 16 is identical with the port Impedance of double frequency Wilkinson power divider, and the characteristic impedance of transmission line 19 is identical with the port Impedance of double frequency Wilkinson power divider, and described transmission line 16 and transmission line 19 are equal microstrip transmission line.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not limited by the examples; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (9)
1. three frequency band Wilkinson power dividers, comprise double frequency Wilkinson power divider, it is characterized in that, be separately installed with impedance transformer on three ports of described double frequency Wilkinson power divider, described impedance transformer is used to realize three work of Wilkinson power divider frequently.
2. according to the described three frequency band Wilkinson power dividers of claim 1, it is characterized in that described impedance transformer is made up of double-frequency resonance device and transmission line, described double frequency Wilkinson power divider is connected with the double-frequency resonance device by transmission line.
3. according to the described three frequency band Wilkinson power dividers of claim 2, it is characterized in that, described double frequency Wilkinson power divider is connected with the double-frequency resonance device by transmission line, specifically be meant, described transmission line is in parallel with the double-frequency resonance device, one port of described transmission line is connected with the port of double frequency Wilkinson power divider, and the another port of transmission line is as the port of three frequency band Wilkinson power dividers.
4. according to the described three frequency band Wilkinson power dividers of claim 2, it is characterized in that, described double-frequency resonance device is made up of open circuit minor matters line and short circuit minor matters line, wherein in the impedance transformer of three frequency band Wilkinson power divider output ports, described open circuit minor matters line and short circuit minor matters line parallel, short circuit minor matters line is in parallel with transmission line; In the impedance transformer of three frequency band Wilkinson power divider input ports, described open circuit minor matters line is in parallel with transmission line, and short circuit minor matters line is in parallel with transmission line.
5. according to the described three frequency band Wilkinson power dividers of claim 1, it is characterized in that described impedance transformer is made up of step electric impedance resonator and transmission line, described double frequency Wilkinson power divider is connected with step electric impedance resonator by transmission line.
6. according to the described three frequency band Wilkinson power dividers of claim 1, it is characterized in that, described double frequency Wilkinson power divider is connected with step electric impedance resonator by transmission line, specifically be meant, described transmission line is in parallel with step electric impedance resonator, one port of described transmission line is connected with the port of double frequency Wilkinson power divider, and the another port of transmission line is as the port of three frequency band Wilkinson power dividers.
7. according to the described three frequency band Wilkinson power dividers of claim 5, it is characterized in that described step electric impedance resonator is made up of second transmission line and the open circuit minor matters line of series connection, second transmission line of described step electric impedance resonator is connected with transmission line.
8. according to claim 2 or 5 described three frequency band Wilkinson power dividers, it is characterized in that the characteristic impedance of described transmission line is identical with the port Impedance of double frequency Wilkinson power divider.
9. according to claim 2 or 5 described three frequency band Wilkinson power dividers, it is characterized in that described transmission line is a microstrip transmission line.
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| CN2010105299079A CN101976754B (en) | 2010-10-29 | 2010-10-29 | Tri-band Wilkinson power distributor |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103022617A (en) * | 2012-12-22 | 2013-04-03 | 西安电子科技大学 | Double-frequency-range power divider capable of being applied to S wave band and X wave band |
| CN104202033A (en) * | 2014-09-17 | 2014-12-10 | 王少夫 | Distributive correlator |
| CN105244590A (en) * | 2015-10-22 | 2016-01-13 | 华南理工大学 | Ultra wide band power divider |
| CN106299560A (en) * | 2016-08-22 | 2017-01-04 | 淮阴工学院 | A kind of high selectivity broadband merit filter-divider |
| CN107846196A (en) * | 2017-11-03 | 2018-03-27 | 成都嘉纳海威科技有限责任公司 | A kind of high-power high-efficiency power amplifier insensitive to source and load impedance |
| 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 |
| CN109995337A (en) * | 2019-02-19 | 2019-07-09 | 中科院微电子研究所昆山分所 | A kind of power amplifier and amplification method |
| CN113540727A (en) * | 2021-06-30 | 2021-10-22 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Frequency selective microstrip shunt |
| CN114050390A (en) * | 2021-10-08 | 2022-02-15 | 杭州永谐科技有限公司 | Design method of power divider and harmonic elimination type power divider |
| WO2022047626A1 (en) * | 2020-09-01 | 2022-03-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Radio frequency power divider and circuit including the same |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022617A (en) * | 2012-12-22 | 2013-04-03 | 西安电子科技大学 | Double-frequency-range power divider capable of being applied to S wave band and X wave band |
| CN104202033A (en) * | 2014-09-17 | 2014-12-10 | 王少夫 | Distributive correlator |
| CN105244590A (en) * | 2015-10-22 | 2016-01-13 | 华南理工大学 | Ultra wide band power divider |
| CN105244590B (en) * | 2015-10-22 | 2018-09-14 | 华南理工大学 | A kind of ultra wideband power divider |
| CN106299560A (en) * | 2016-08-22 | 2017-01-04 | 淮阴工学院 | A kind of high selectivity broadband merit filter-divider |
| 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 |
| CN107846196A (en) * | 2017-11-03 | 2018-03-27 | 成都嘉纳海威科技有限责任公司 | A kind of high-power high-efficiency power amplifier insensitive to source and load impedance |
| CN109995337A (en) * | 2019-02-19 | 2019-07-09 | 中科院微电子研究所昆山分所 | A kind of power amplifier and amplification method |
| CN109995337B (en) * | 2019-02-19 | 2023-07-04 | 昆山微电子技术研究院 | Power amplifier and amplifying method |
| WO2022047626A1 (en) * | 2020-09-01 | 2022-03-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Radio frequency power divider and circuit including the same |
| CN113540727A (en) * | 2021-06-30 | 2021-10-22 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Frequency selective microstrip shunt |
| CN114050390A (en) * | 2021-10-08 | 2022-02-15 | 杭州永谐科技有限公司 | Design method of power divider and harmonic elimination type power divider |
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