CN204179196U - A kind of ultra wide band Wilkinson power divider - Google Patents
A kind of ultra wide band Wilkinson power divider Download PDFInfo
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- CN204179196U CN204179196U CN201420594914.0U CN201420594914U CN204179196U CN 204179196 U CN204179196 U CN 204179196U CN 201420594914 U CN201420594914 U CN 201420594914U CN 204179196 U CN204179196 U CN 204179196U
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- power
- power divider
- impedance
- impedance transformer
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Abstract
The utility model provides a kind of ultra wide band Wilkinson power divider, comprise input port and output port, described output port is provided with isolation resistance, described input port is provided with more piece impedance transformer, and each joint impedance transformer is all be made up of the isolation resistance of quarter-wave impedance line and impedance line output.Adopt the structure of Wilkinson power divider, adopt traditional more piece impedance transformation line to carry out spread bandwidth simultaneously, make power splitter still have certain isolation when ultrabroad band, combine the advantage of above-mentioned two kinds of power splitters, substantially increase the performance of power splitter.Be applicable to generally being applied in the aspects such as Radar-Communication, radio communication, Microwave Test Equipment and spectrum monitoring.
Description
Technical field
The utility model relates to power splitter, is specifically related to a kind of ultra wide band Wilkinson power divider.
Background technology
Along with optical fiber communication, mobile communication, satellite communication, electronic countermeasures, microwave measuring instrument etc. are towards miniaturized, broadband and the development of higher working frequency range, the carrier wave of various communication system not only frequency improves constantly, and frequency band is also more and more wider.The demand of the miniaturized low-power consumption microwave device of ultra broadband constantly increases.In microwave circuit and measuring system, the performance as the power division in power amplifier circuit, frequency mixer and coupling element will affect the performance of whole system.Therefore the power splitter designing broadband miniaturization has great importance.
Power divider is Films In Passive Microwave Devices, for power division.In power division, an input signal is divided into two (or multiple) less power signal by power splitter.Power splitter is generally decile (3dB) form, but also has unequal merit proportion by subtraction.In microwave circuit, microwave power distributor is the critical function device for input signal being divided into two-way or multiple-channel output, is one of core devices of composition microwave system and wireless communication system.Simple T-shaped power splitter and isolation power divider two kinds is divided into according to the unusual of circuit.Usually do not settle isolation resistance between simple T-shaped power splitter output, its electric circuit characteristic more easily realizes multichannel power division, can obtain good power-division ratios at larger bandwidth range.Because this kind of power splitter adopts more piece impedance transformation line to carry out broadening power amplifier bandwidth mostly, cause its size usually long, not easily realize integrated.And lack isolation between its output port, be therefore greatly limited in the application.Nineteen sixty, Wilkinson proposes isolation power divider first, we were referred to as Wilkinson power divider afterwards, and the output of this type power splitter in circuit structure is introduced isolation resistance and made to obtain reasonable isolation between each port of output, is widely used in microwave circuit.
Summary of the invention
The purpose of this utility model is: provide a kind of ultra wide band Wilkinson power divider, and the power averaging that can realize 2 ~ 20GHz distributes, and ensures the power flatness in whole frequency range, improves the performance of system, has fabulous economic benefit and application prospect.
The technical solution of the utility model is: a kind of ultra wide band Wilkinson power divider, comprise input port and output port, described output port is provided with isolation resistance, described input port is provided with more piece impedance transformer, and each joint impedance transformer is all be made up of the isolation resistance of quarter-wave impedance line and impedance line output.
Further, described more piece impedance transformer is Chebyshev's more piece impedance transformer.The ripple of sacrificing in frequency band obtains larger utilized bandwidth.
Further, the joint number of described more piece impedance transformer is 7-17.The power averaging that can realize 2 ~ 20GHz distributes, and ensure that again its size can not be oversize, practicality is good.
The beneficial effects of the utility model are: the structure adopting Wilkinson power divider, adopt traditional more piece impedance transformation line to carry out spread bandwidth simultaneously, power splitter is made still to have certain isolation when ultrabroad band, combine the advantage of above-mentioned two kinds of power splitters, substantially increase the performance of power splitter.Be applicable to generally being applied in the aspects such as Radar-Communication, radio communication, Microwave Test Equipment and spectrum monitoring.
Accompanying drawing explanation
Fig. 1 is the decile Wilkinson power divider of micro-band forms;
Fig. 2 is the effective transmission line circuit of decile Wilkinson power divider;
Fig. 3 is point Wilkinson power dividers such as more piece;
Fig. 4 is the characteristic of Chebyshev's impedance transformer;
Fig. 5 is the simulation model of 2 ~ 20GHz power splitter;
Fig. 6, Fig. 7, Fig. 8 are the S parameter simulation result of power splitter.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
A kind of ultra wideband power divider of the utility model, it structurally belongs to the type of Wilkinson (Wilkinson) power splitter.Wilkinson (Wilkinson) power splitter is one of the most frequently used power splitter.Wilkinson (Wilkinson) power splitter adds resistive isolation on the basis of traditional power splitter, improve the isolation between output port, application in microwave telecommunication system is very extensive, and therefore this patent adopts the form of Wilkinson power divider.The decile Wilkinson power divider structure of microstrip line form as shown in Figure 1.
For the sake of simplicity, we, with all impedances of characteristic impedance Zo normalization, draw the effective transmission line circuit of circuit shown in Fig. 1 again.Be illustrated in figure 2 the effective transmission line structure of two-way power divider.This power divider is three port devices, comprises input port 1 and output port 2 and output port 3, the analytical method of network can be used to derive its collision matrix.Even-odd mould analytical method can be adopted to analyze equivalent transmission line circuit, obtain the collision matrix of decile Wilkinson power divider as shown in (1) formula.
As can be seen from formula, port 2 and port 3 etc. divide the input power of port one, completely isolated between port 2 and port 3.But in fact, the decile Wilkinson power divider of this single-unit only just has such excellent characteristic in centre frequency, is therefore only applicable to arrowband situation.
The utilized bandwidth of the decile Wilkinson power divider of this single-unit only has tens percent at most, meet the bandwidth of 2 ~ 20GHz of this patent, and more piece impedance transformer must be used to carry out the bandwidth of broadening Wilkinson power divider.Each joint is all be made up of quarter-wave impedance line, and the output of each joint all adds resistive isolation, as shown in Figure 3.In design, joint number used is more, and utilized bandwidth is then wider, and degree of isolation is also higher.
The joint number of impedance transformer determines the utilized bandwidth of power splitter.So the Wilkinson power divider of design ultra broadband, first according to the utilized bandwidth of power splitter, the joint number of power splitter middle impedance converter to be determined.By the Computer Aided Design of computer software ADS and HFSS, the circuit of more piece Wilkinson power divider and electromagnetic field are emulated, the power splitter that will reach this patent 2 ~ 20GHz bandwidth can be drawn, at least need the conversion joint number of use more than 7 grades.
The more piece impedance transformer of the present embodiment power splitter adopts Chebyshev's more piece impedance transformer structural design.The feature of Chebyshev transformation device is that the ripple of sacrificing in frequency band obtains larger utilized bandwidth, as shown in Figure 4.
Power splitter parameter designing:
In the present embodiment, the more piece impedance transformer of power splitter adopts Chebyshev's more piece impedance transformer structural design.The feature of Chebyshev transformation device is that the ripple of sacrificing in frequency band obtains larger utilized bandwidth, as shown in Figure 4.
The circuit parameter of Chebyshev's impedance transformer can use even-odd mould analytical method by the highest frequency f2 (π-θ in corresponding diagram 4 of service band
m) and the low-limit frequency f1 (θ in corresponding diagram 4
m) and maximum voltage standing-wave ratio determine.
Specifically, the mass reflex coefficient Γ of impedance transformer can be represented by (2) formula:
Γ＝2e
-jNθ[Γ
0cos Nθ+Γ
1cos(N-2)θ+…Γ
ncos(N-2n)θ+…]………(2)
＝Ae
-jNθT
N(secθ
mcosθ)
Wherein, Γ
0, Γ
1..., Γ
nbe the reflection coefficient of impedance transformation Nodes, A is undetermined constant, and N is the joint number of impedance transformer, T
n(sec θ
mcos θ) be the Chebyshev polynomials on N rank.When N is even number time, last of the middle progression of formula (2) is (1/2) Γ
n/2, be Γ when N is odd number
(N-1)/2cos θ.At the centre frequency fo place of frequency band, the electrical length often saving impedance line is pi/2, λ/4 at frequency place centered by the length therefore often saving impedance transformation line.
The reflection coefficient Γ of impedance transformation Nodes can be determined by (2) formula
n, by Chebyshev polynomials T
n(sec θ
mcos θ) launch after, make cos (N-2n) θ item all equal, pass through formula
the characteristic impedance often saving impedance transformation line can be calculated.
Adopting 7 joint impedance transformation lines in the present embodiment, by calculating the normalized characteristic impedance finally often being saved impedance transformation line being:
The normalized characteristic impedance of table 1 impedance transformation line (7 joint)
| Bandwidth f2/f1 | Z 1 | Z 2 | Z 3 | Z 4 | Z 5 | Z 6 | Z 7 |
| 10 | 1.774 | 1.6597 | 1.5364 | 1.4142 | 1.3017 | 1.2051 | 1.1274 |
Power divider circuit design of Simulation:
After determining power splitter each side parameter, ADS software is first used to set up the power divider circuit model of design.Circuit adopts thickness to be 0.5mm dielectric constant is the ROGERS5880 sheet material of 2.2, and cabling adopts microstrip line.With the design of this circuit model and the power splitter emulating 2 ~ 20GHz.Simulation model in ADS as shown in Figure 5.
Divide the isolation of loss and output for merit, through continuous simulation optimization, can obtain as Fig. 6,7, the simulation result of 8.
As can be seen from the figure, in 2 ~ 20GHz free transmission range, the power output flatness of power splitter is better, and emulation obtains
the insertion loss of signal is not more than 3.5dB; The isolation of output port is better at free transmission range, and in whole wave band, the isolation overwhelming majority meets more than 12dB.Meet radio ultra wide band system index request.
Table 2 power splitter design objective property list
This patent is specially adapted to the systems such as Radar-Communication, radio communication, Microwave Test Equipment and spectrum monitoring, and the design of various frequency microwave tester.The power averaging adopting the ultra wideband power divider of this patent to achieve 2 ~ 20GHz distributes, and ensures the power flatness in whole frequency range, improves the performance of system, has fabulous economic benefit and application prospect.
Claims (3)
1. a ultra wide band Wilkinson power divider, comprise input port and output port, it is characterized in that: described output port is provided with isolation resistance, described input port is provided with more piece impedance transformer, and each joint impedance transformer is all be made up of the isolation resistance of quarter-wave impedance line and impedance line output.
2. a kind of ultra wide band Wilkinson power divider according to claim 1, is characterized in that: described more piece impedance transformer is Chebyshev's more piece impedance transformer.
3. a kind of ultra wide band Wilkinson power divider according to claim 1, is characterized in that: the joint number of described more piece impedance transformer is 7-17.
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| CN201420594914.0U CN204179196U (en) | 2014-10-15 | 2014-10-15 | A kind of ultra wide band Wilkinson power divider |
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| CN201420594914.0U CN204179196U (en) | 2014-10-15 | 2014-10-15 | A kind of ultra wide band Wilkinson power divider |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186083A (en) * | 2015-09-29 | 2015-12-23 | 中国电子科技集团公司第四十一研究所 | Miniaturized ultra wide band microwave power divider |
| CN105244583A (en) * | 2015-10-21 | 2016-01-13 | 电子科技大学 | Novel ultra-wideband microstrip Wilkinson power divider |
| CN106654496A (en) * | 2016-11-25 | 2017-05-10 | 成都雷电微力科技有限公司 | Improved single-section Wilkinson power divider |
| CN107681242A (en) * | 2017-11-10 | 2018-02-09 | 深圳市华讯方舟微电子科技有限公司 | Wilkinson power divider |
| CN107707215A (en) * | 2017-09-29 | 2018-02-16 | 大连海事大学 | Bear group delay microwave circuit and its design method in a kind of broadband |
| CN108281744A (en) * | 2018-01-30 | 2018-07-13 | 中国电子科技集团公司第三十八研究所 | A kind of broadband power divider and its circuit parameter design method based on Chebyshev transformation device |
| CN108281743A (en) * | 2018-01-22 | 2018-07-13 | 中国计量科学研究院 | Power splitter |
| CN109066044A (en) * | 2018-08-30 | 2018-12-21 | 南京理工大学 | A kind of ultra wide band Wilkinson power divider |
| CN109216851A (en) * | 2017-07-06 | 2019-01-15 | 北京遥感设备研究所 | A kind of ultra wide band Wilkinson No. eight power divider |
| CN109766657A (en) * | 2019-01-25 | 2019-05-17 | 吉林大学 | A kind of Wilkinson power divider and preparation method thereof of Chebyshev's filtering characteristic with isolation frequency point alignment |
| CN112713378A (en) * | 2020-12-04 | 2021-04-27 | 西安电子科技大学 | Ultra-wideband miniaturized power divider, design method and multi-channel communication network terminal |
| CN113746434A (en) * | 2021-07-26 | 2021-12-03 | 杭州电子科技大学 | Broadband Doherty power amplifier based on load modulation network |
| CN114824720A (en) * | 2022-04-13 | 2022-07-29 | 电子科技大学 | Compact transformer Wilkinson balun embedded with impedance transformation function |
| CN115313007A (en) * | 2022-04-12 | 2022-11-08 | 河北军澍电子科技有限公司 | Ultra-wideband miniaturized microstrip power divider |
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- 2014-10-15 CN CN201420594914.0U patent/CN204179196U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105186083A (en) * | 2015-09-29 | 2015-12-23 | 中国电子科技集团公司第四十一研究所 | Miniaturized ultra wide band microwave power divider |
| CN105244583A (en) * | 2015-10-21 | 2016-01-13 | 电子科技大学 | Novel ultra-wideband microstrip Wilkinson power divider |
| CN105244583B (en) * | 2015-10-21 | 2017-12-15 | 电子科技大学 | A kind of new ultra-wide band micro-strip Wilkinson power divider |
| CN106654496A (en) * | 2016-11-25 | 2017-05-10 | 成都雷电微力科技有限公司 | Improved single-section Wilkinson power divider |
| CN109216851A (en) * | 2017-07-06 | 2019-01-15 | 北京遥感设备研究所 | A kind of ultra wide band Wilkinson No. eight power divider |
| CN107707215A (en) * | 2017-09-29 | 2018-02-16 | 大连海事大学 | Bear group delay microwave circuit and its design method in a kind of broadband |
| CN107707215B (en) * | 2017-09-29 | 2020-09-22 | 大连海事大学 | Broadband negative group time delay microwave circuit and design method thereof |
| CN107681242A (en) * | 2017-11-10 | 2018-02-09 | 深圳市华讯方舟微电子科技有限公司 | Wilkinson power divider |
| CN107681242B (en) * | 2017-11-10 | 2019-01-04 | 深圳市华讯方舟微电子科技有限公司 | Wilkinson power divider |
| CN108281743A (en) * | 2018-01-22 | 2018-07-13 | 中国计量科学研究院 | Power splitter |
| CN108281743B (en) * | 2018-01-22 | 2021-01-12 | 中国计量科学研究院 | On-chip integrated compact broadband power divider |
| CN108281744A (en) * | 2018-01-30 | 2018-07-13 | 中国电子科技集团公司第三十八研究所 | A kind of broadband power divider and its circuit parameter design method based on Chebyshev transformation device |
| CN108281744B (en) * | 2018-01-30 | 2021-05-07 | 中国电子科技集团公司第三十八研究所 | Broadband power divider based on Chebyshev converter and circuit parameter design method thereof |
| CN109066044A (en) * | 2018-08-30 | 2018-12-21 | 南京理工大学 | A kind of ultra wide band Wilkinson power divider |
| CN109766657A (en) * | 2019-01-25 | 2019-05-17 | 吉林大学 | A kind of Wilkinson power divider and preparation method thereof of Chebyshev's filtering characteristic with isolation frequency point alignment |
| CN112713378A (en) * | 2020-12-04 | 2021-04-27 | 西安电子科技大学 | Ultra-wideband miniaturized power divider, design method and multi-channel communication network terminal |
| CN113746434A (en) * | 2021-07-26 | 2021-12-03 | 杭州电子科技大学 | Broadband Doherty power amplifier based on load modulation network |
| CN115313007A (en) * | 2022-04-12 | 2022-11-08 | 河北军澍电子科技有限公司 | Ultra-wideband miniaturized microstrip power divider |
| CN114824720A (en) * | 2022-04-13 | 2022-07-29 | 电子科技大学 | Compact transformer Wilkinson balun embedded with impedance transformation function |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20191015 |
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