CN101976754B - Tri-band Wilkinson power distributor - Google Patents
Tri-band Wilkinson power distributor Download PDFInfo
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- CN101976754B CN101976754B CN2010105299079A CN201010529907A CN101976754B CN 101976754 B CN101976754 B CN 101976754B CN 2010105299079 A CN2010105299079 A CN 2010105299079A CN 201010529907 A CN201010529907 A CN 201010529907A CN 101976754 B CN101976754 B CN 101976754B
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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 band Wilkinson power distributors.
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 amplifiers, 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 meet 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 applying at present, it is mainly the port match characteristic when adopting two joint transmission line impedance converters to realize the even mould excitation of power divider, 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 to not add extra inductance and electric capacity at output port.
at present, three band Wilkinson power distributors 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, formed by three joint transmission line impedance converters and three isolation resistances, port match when three joint transmission line impedance converters can be realized the even mould excitation of power divider, 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 object of the invention is to overcome traditional Wilkinson power divider and can only be operated in the shortcomings such as single frequency range and odd harmonic place thereof, three band Wilkinson power distributors are provided, the present invention can realize the work of three band Wilkinson power distributors, have that cost is low, advantages of simple structure and simple, can work to meet the multiband job requirement of Modern wireless communication under three controlled frequency ranges.
The present invention seeks to be achieved through the following technical solutions, three band Wilkinson power distributors, 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 for realizing three work of Wilkinson power divider frequently.
To better implement the present invention, described impedance transformer is comprised 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 refer to, 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 band Wilkinson power distributors.
Described double-frequency resonance device is comprised of open circuit minor matters line and short circuit minor matters line, wherein in the impedance transformer of three band Wilkinson power distributor 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 band Wilkinson power distributor 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 comprised 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 refer to, 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 band Wilkinson power distributors.
Described step electric impedance resonator is comprised of the second transmission line and the open circuit minor matters line of series connection, and the 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 microstrip transmission line.
Compared with prior art, the present invention has following beneficial effect:
1, realize multifrequency, reduce costs: 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 isolation resistances to realize the strange mould excitation of power divider, 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 having adopted open circuit short circuit minor matters line in power divider, so the present invention can introduce transmission zero outside the power divider passband, suppresses 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 band Wilkinson power distributors in 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 band Wilkinson power distributors in embodiment one;
Fig. 4 is three band Wilkinson power distributor input return loss result schematic diagrams in embodiment one;
Fig. 5 is three band Wilkinson power distributor output return loss result schematic diagrams in embodiment one;
Fig. 6 is three band Wilkinson power distributor insertion loss result schematic diagrams in embodiment one;
Fig. 7 is the isolation result schematic diagram of three band Wilkinson power distributor outputs in embodiment one;
Fig. 8 is the PCB cloth domain of three band Wilkinson power distributors in 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 to this.
Embodiment one
One of the present embodiment is operated in 1/2.55/3GH three band Wilkinson power distributors, 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 for realizing input port coupling and the output port isolation of three band Wilkinson power distributors.
As shown in Figure 2, described impedance transformer is comprised 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 isolation resistance of access 11 forms traditional single-frequency Wilkinson power divider between output, and described double frequency Wilkinson power divider is to add two sections open circuit minor matters lines 12 and two sections open circuit minor matters lines 13 to realize by the port in traditional single-frequency Wilkinson power divider structure.In order to make circuit compact, 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 band Wilkinson power distributor output ports (port 2 and port 3) is comprised of transmission line 16, open circuit minor matters line 14 and short circuit minor matters line 15, the one end open circuit in parallel minor matters line 14 of described transmission line 16, the minor matters of opening a way simultaneously line 14 and 15 parallel connections of short circuit minor matters line.Wherein open circuit minor matters line 14 in parallel 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 as the output port 2 of described three band Wilkinson power distributors or output port 3.The required impedance transformer of the input port 1 of three band Wilkinson power distributors is comprised 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 band Wilkinson power distributors 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 is connected to form short circuit by this grounding through hole 20 with floor.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 bend equally.the value of isolation resistance 11 is defined as 2 times of three band Wilkinson power distributor port Impedance values, the characteristic impedance value of transmission line 10 is 1.85 times of three band Wilkinson power distributor port Impedance values, the resistance value of open circuit branch line 12 is 2.62 times of three band Wilkinson power distributor port Impedance values, the resistance value of open circuit branch line 13 is 2.62 times of three band Wilkinson power distributor port Impedance values, the resistance value of open circuit branch line 14 is 1.46 times of three band Wilkinson power distributor port Impedance values, the resistance value of short circuit branch line 15 is 1.03 times of three band Wilkinson power distributor port Impedance values, the characteristic impedance value of transmission line 16 is the same with three band Wilkinson power distributor port Impedance values, the characteristic impedance value of transmission line 19 is the same with three band Wilkinson power distributor port Impedance values.While 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 band Wilkinson power distributor input return loss result schematic diagrams, as shown in Figure 4, wherein solid line is the Electromagnetic Simulation result, dotted line is Simulation results; Can clearly see in 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 band Wilkinson power distributors of the present embodiment have been realized the input port coupling under these 3 frequency ranges.
Above-mentioned three band Wilkinson power distributor output return loss result schematic diagrams, as shown in Figure 5, wherein solid line is the Electromagnetic Simulation result, dotted line is Simulation results; Can clearly see in 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 band Wilkinson power distributors of the present embodiment have been realized the output port coupling of power divider under these 3 frequency ranges.
Above-mentioned three band Wilkinson power distributor insertion loss result schematic diagrams, as shown in Figure 6, wherein solid line is the Electromagnetic Simulation result, dotted line is Simulation results, (61) be a transmission zero at direct current place, (62) be a transmission zero between first job frequency 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 in figure near 1GHz, 2.55GHz and these three frequencies of 3GHz | S21| is in-3dB left and right, wherein | and S21| represents the amplitude of port one to the transmission coefficient of port 2.Three band Wilkinson power distributors of the present embodiment have been realized the constant power output of power divider under these 3 frequency ranges.See (61) in figure, (62) and (63) these transmission zeros, signal, at these 3 frequency places, can not be transferred to output from input, by these transmission zeros, can be suppressed at this 3 frequency place unwanted signals.
The isolation result schematic diagram of above-mentioned three band Wilkinson power distributor outputs, as shown in Figure 7, wherein solid line is the Electromagnetic Simulation result, dotted line is Simulation results, can clearly see in figure near 1GHz, 2.55GHz and these three frequencies of 3GHz | S32| is in-20dB left and right, wherein | and S32| represents the amplitude of port 2 to the transmission coefficient of port 3.Three band Wilkinson power distributors of the present embodiment have been realized the output port isolation under these 3 frequency ranges.
Embodiment two
A kind of three band Wilkinson power distributors, 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 for realizing input port coupling and the output port isolation of three band Wilkinson power distributors.
Described impedance transformer is comprised 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 isolation resistance of access 11 forms traditional single-frequency Wilkinson power divider between output.Double frequency Wilkinson power divider is to add two sections open circuit minor matters lines 12 and two sections open circuit minor matters lines 13 to realize by the port in traditional single-frequency Wilkinson power divider structure.In order to make circuit compact, 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 band Wilkinson power distributor output ports (output port 2 and output port 3) is by transmission line 16, the second transmission line 26 and open circuit minor matters line 27 form, described transmission line 16 and the second transmission line 26 parallel connections, the second transmission line 26 and 27 series connection of open circuit minor matters line, wherein the second transmission line 26 and open circuit minor matters line 27 have formed step electric impedance resonator, one end of transmission line 16 connects the output port of described double frequency Wilkinson power divider, it is output port 2 or the output port 3 of three band Wilkinson power distributors that the another port of transmission line 16 becomes.The required impedance transformer of the input port 1 of three band Wilkinson power distributors is comprised of transmission line 19, the second transmission line 29 and open circuit minor matters line 30, described transmission line 19 and the second transmission line 29 parallel connections, the second transmission line 29 and 30 series connection of open circuit minor matters line, wherein the second transmission line 29 and open circuit minor matters line 30 have formed 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 band Wilkinson power distributors.In order to reduce circuit size, the second transmission line 26, the 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.
Above-described embodiment is the better execution mode 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 Essence of the present invention and principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, within being included in protection scope of the present invention.
Claims (7)
1. three band Wilkinson power distributors, 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 for realizing three work of Wilkinson power divider frequently; Described impedance transformer is comprised of double-frequency resonance device and transmission line, or step electric impedance resonator and transmission line, consists of, and described double frequency Wilkinson power divider is connected with double-frequency resonance device or step electric impedance resonator by transmission line.
2. three band Wilkinson power distributors according to claim 1, it is characterized in that, described double frequency Wilkinson power divider is connected with the double-frequency resonance device by transmission line, specifically refer to, 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 band Wilkinson power distributors.
3. three band Wilkinson power distributors according to claim 1, it is characterized in that, described double-frequency resonance device is comprised of open circuit minor matters line and short circuit minor matters line, wherein in the impedance transformer of three band Wilkinson power distributor 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 band Wilkinson power distributor 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.
4. three band Wilkinson power distributors according to claim 1, it is characterized in that, described double frequency Wilkinson power divider is connected with step electric impedance resonator by transmission line, specifically refer to, 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 band Wilkinson power distributors.
5. three band Wilkinson power distributors according to claim 1, is characterized in that, described step electric impedance resonator is comprised of the second transmission line and the open circuit minor matters line of series connection, and the second transmission line of described step electric impedance resonator is connected with transmission line.
6. three band Wilkinson power distributors according to claim 1, is characterized in that, the characteristic impedance of described transmission line is identical with the port Impedance of double frequency Wilkinson power divider.
7. three band Wilkinson power distributors according to claim 1, is characterized in that, described transmission line is microstrip transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105299079A CN101976754B (en) | 2010-10-29 | 2010-10-29 | Tri-band Wilkinson power distributor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105299079A CN101976754B (en) | 2010-10-29 | 2010-10-29 | Tri-band Wilkinson power distributor |
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| CN101976754A CN101976754A (en) | 2011-02-16 |
| CN101976754B true CN101976754B (en) | 2013-11-13 |
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| CN2010105299079A Expired - Fee Related CN101976754B (en) | 2010-10-29 | 2010-10-29 | Tri-band Wilkinson power distributor |
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Families Citing this family (10)
| 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 |
| 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 |
| CN107293835B (en) * | 2017-05-27 | 2019-03-22 | 深圳市华讯方舟微电子科技有限公司 | Single-unit 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 |
| CN109995337B (en) * | 2019-02-19 | 2023-07-04 | 昆山微电子技术研究院 | Power amplifier and amplifying method |
| EP4165720A4 (en) * | 2020-09-01 | 2024-03-06 | Telefonaktiebolaget LM Ericsson (publ) | Radio frequency power divider and circuit including the same |
| CN113540727B (en) * | 2021-06-30 | 2022-05-17 | 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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| CN201425968Y (en) * | 2009-04-15 | 2010-03-17 | 大连海事大学 | Double frequency channel satellite navigation receiving antenna |
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