CN103427145A - Novel double-frequency Wilkinson power divider design - Google Patents
Novel double-frequency Wilkinson power divider design Download PDFInfo
- Publication number
- CN103427145A CN103427145A CN2013101578620A CN201310157862A CN103427145A CN 103427145 A CN103427145 A CN 103427145A CN 2013101578620 A CN2013101578620 A CN 2013101578620A CN 201310157862 A CN201310157862 A CN 201310157862A CN 103427145 A CN103427145 A CN 103427145A
- Authority
- CN
- China
- Prior art keywords
- transmission line
- power divider
- port
- branch
- open circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Microwave Amplifiers (AREA)
Abstract
The present invention provides a novel double-frequency Wilkinson power divider belonging to the microwave transmission technology field. The structure design characteristics of the power divider are that the two output ports of the conventional Wilkinson power divider are located at the two ends of an isolating resistor, while the two output ports of the present invention are far away from the isolating resistor and are located at the middle positions of the power divider, namely, the port 2 is connected at the connection position of a transmission line 3 and a transmission line 5, the port 3 is connected at the connection position of a transmission line 4 and a transmission line 6; at the same time, two open branch circuits are designed to be connected at an input port, namely, one end of the open branch circuit 1 is connected at the connection position of the port 1 and the transmission line 3, and the other end is in open circuit; one end of the open branch circuit 2 is connected at the connection position of the port 1 and the transmission line 4, and the other end is in open circuit. According to the displacement of the output ports and the design that the two open branch circuits are connected at the input port, the Wilkinson power divider of the present invention possesses a wider work bandwidth and a larger frequency ratio under the double-frequency work.
Description
Technical field
The present invention designs a kind of passive microwave transmission apparatus, exactly, designs a kind of Novel double-frequency Wilkinson power divider, belongs to the microwave transmission technical field.
Background technology
Often use power combiner or distributor in wireless communication system, especially in the middle of the application of phased array antenna, vector adjuster and frequency mixer.In recent years, the design of two-band Wilkinson power splitter has obtained many achievements, comprise in conjunction with parallel rlc circuit, utilize novel minor matters to do structural adjustment and port extension, but all these can only realize on a little frequency ratio.And, along with the increase of operating frequency, power splitter medium transmission distance between centers of tracks is more and more less, make the parasitic effects between transmission line increase.At document [Y. Shin, B. Lee, and M. Park, Dual-band Wilkinson power divider with shifted output ports, IEEE Microw Wireless Compon Lett 18 (2008), 443-445.], [Y. Shin, B. Lee, and M. Park, Dual-band Wilkinson power divider with shifted output ports, IEEE Microw Wireless Compon Lett 18 (2008), 443-445.] in, in order to meet the desirable isolation effect of power splitter and impedance matching, the project organization variation of dual-frequency power divider, for example the design based on short circuit minor matters or open circuit minor matters carrys out the scope of the frequency ratio in expansion work.At document [X. Tang, and K. Mouthaan, Analysis and design of compact two-way Wilkinson power dividers using coupled lines, Proc. 30nd Asia-Pacific Microw. Conf., vol. 1, Dec. 2009, pp. 1319 – 1322.] in proposed based on the coupling line power divider, belong to the single band design.Traditional coupled transmission line has its advantage, as compact conformation, can adopt the analytical method of even mould and Qi Mo to realize impedance matching, and design parameter is relatively flexible.At document [M.-J. Park, Two-section cascaded coupled line Wilkinson power divider for dual-band applications, IEEE Microw Wireless Compon Lett 19 (2009), 188-190.] in, the double frequency power divider of the binodal cascade coupled transmission line proposed, its frequency ratio scope has limitation.At document [M.-J. Park, Dual-band Wilkinson divider with coupled output port extensions, IEEE Trans Microwave Theory Tech 57 (2009), 2232-2237.] in the scope of its frequency ratio of power splitter of design increase to some extent.
The bandwidth of the double frequency Wilkinson power divider that proposed so far and the scope of frequency ratio have its limitation, can not effectively meet decile and move and wireless communication system work requirements on double frequency-band.Therefore, how to build desirable isolation structure, have the double frequency Wilkinson power divider of wider bandwidth of operation and larger frequency ratio simultaneously, its structure and corresponding strict method for designing are keys of the present invention.
Summary of the invention
The invention provides a kind of double frequency Wilkinson power divider, its most important characteristics are structural designs of power divider, two output ports of traditional Wilkinson power divider are positioned at the two ends of isolation resistance, and two output ports of the present invention are away from isolation resistance, be positioned at the centre position of power divider, the input of the second port Port2 is connected in the junction of first branch's transmission line 3 and the 3rd branch's transmission line 5; The input of the 3rd port Port3 is connected in the junction of second branch's transmission line 4 and the 4th branch's transmission line 6; Design two open circuit minor matters simultaneously and be positioned at the connection of input port place, the minor matters of opening a way 1 one ends are connected in the junction of the first port Port1 and first branch's transmission line 3, other end open circuit; Open circuit minor matters 2 one ends are connected in the junction of the first port Port1 and second branch's transmission line 4, other end open circuit; The transfer of output port position is connected the design of two open circuit minor matters with input port, make Wilkinson power divider of the present invention have wider bandwidth of operation and larger frequency ratio under two-frequency operation.
Guaranteeing that, under the prerequisite that Wilkinson power divider coupling and transmission characteristic are good, the present invention adopts the coupling microstrip line structure to realize, its major advantage is: (1) makes it to obtain the two-frequency operation characteristic on the wideband ratio; (2) by the scheme of a small amount of transmission line section, the power divider overall structure is greatly simplified; (3) do not need to configure extra lamped element, simple in structure, novel, cheap for manufacturing cost in circuit except a resistance; (4) be easy under the condition of Project Realization, the live width of coupled microstrip line and distance between centers of tracks can arrange arbitrarily, therefore design parameter flexibly, conveniently; (5) miniaturization of Distributed Design and complanation, be easy to realize integrated; (6) introduce the structure formed by the isolation minor matters, reduced the parasitic effects between transmission line.
The accompanying drawing explanation
Fig. 1 is that the structure of double frequency Wilkinson power divider of the present invention forms schematic diagram.
Fig. 2 is double frequency Wilkinson power divider schematic equivalent circuit of the present invention: even mould equivalent electric circuit (a), strange mould equivalent electric circuit (b).
Fig. 3 is the curve synoptic diagram between double frequency Wilkinson power divider normalized characteristic impedance of the present invention and isolation resistance and frequency ratio.
Fig. 4 is the schematic diagram in kind of double frequency Wilkinson power divider of the present invention.
Fig. 5 is port reflection coefficient spectral characteristic, calculated value and the Entity measurement value of double frequency Wilkinson power divider of the present invention.
Fig. 6 is port transmission coefficient and isolating coefficient spectral characteristic, calculated value and the Entity measurement value of double frequency Wilkinson power divider of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with drawings and Examples, the present invention is described in further detail.
Double frequency Wilkinson power divider of the present invention is by being printed on dielectric-slab, forming as the power divider main body and for coupled microstrip line and the port thereof of realizing coupling and transmission characteristic conversion.Adopt parity mode Analysis of Equivalent Circuit theory, simplify circuit design.
Referring to Fig. 1, the structure of specifically introducing power divider of the present invention forms:
The first port Port1 is input port, and the second port Port2 is output port, and the 3rd port Port3 is output port, open circuit minor matters 1, open circuit minor matters 2, the first branch's transmission line 3, the second branch's transmission lines 4, the 3rd branch's transmission line 5, the four branch's transmission lines 6, isolation resistance 7; The input of the first port Port1 is connected in the junction of first branch's transmission line 3 and second branch's transmission line 4; The input of the second port Port2 is connected in the junction of first branch's transmission line 3 and the 3rd branch's transmission line 5; The input of the 3rd port Port3 is connected in the junction of second branch's transmission line 4 and the 4th branch's transmission line 6; Open circuit minor matters 1 one ends are connected in the junction of the first port Port1 and first branch's transmission line 3, other end open circuit; Open circuit minor matters 2 one ends are connected in the junction of the first port Port1 and second branch's transmission line 4, other end open circuit; Isolation resistance 7 one ends are connected in the 3rd branch's transmission line 5, and the other end is connected in the 4th branch's transmission line 6.
In desirable lossless situation, power divider the first port Port1 connection performance impedance Z of the present invention
A, the second port Port2 and the 3rd port Port3 connection performance impedance Z
B, open circuit minor matters 1 and open circuit minor matters 2 characteristic impedance Z1, electrical length θ
1, first branch's transmission line 3 and second branch's transmission line 4 are a joint coupled transmission line, characteristic impedance is Z
2eAnd Z
2o.Electrical length is θ
2, the 3rd branch's transmission line 5 and the 4th branch's transmission line 6 are a joint coupled transmission line, characteristic impedance is Z
3eAnd Z
3o,Electrical length is θ
3, subscript e and o mean respectively even mould and Qi Mo, isolation resistance 7 resistances are R.
The concrete execution step of design power divider of the present invention is as follows.
Step 1: determine the first port Port1 characteristic impedance Z
A, the second port Port2 and the 3rd port Port3 characteristic impedance Z
B.
Step 2: the present invention adopts even mould and Qi Mo excitation to analyze, and can obtain as shown in Figure 22 (a) even mould equivalent electric circuit, the strange mould equivalent electric circuit of 2 (b).
Step 3: the double frequency Wilkinson power divider of desirable decile should meet the coupling of all of the port, uniform transmission, and two output ports are isolated mutually, according to the even mould equivalent electric circuit of Fig. 2 (a), draw following equation:
, from characteristic impedance, be Z
2eThe transmission line left end eye right into characteristic impedance be Z
In2:
, from characteristic impedance, be Z
2eThe transmission line right-hand member eye right into characteristic impedance be Z
In1:
.
Three formula by step 3 are made a series of simplified operations, can show that corresponding real part and imaginary part are respectively:
.
Step 4: according to the strange mould equivalent electric circuit of Fig. 2 (b), draw following equation:
, from characteristic impedance, be Z
2oThe transmission line right-hand member eye left into characteristic impedance be Z
In3:
, from characteristic impedance, be Z
2oThe transmission line right-hand member eye right into characteristic impedance be Z
In4:
.
Three formula by step 4 are made a series of simplified operations, can show that corresponding real part and imaginary part are respectively:
.
Step 5: for the design of power divider, scattering parameter (S-parameter) is very important.As can be seen from Figure 1 the power divider structure is symmetrical, draws following relation:
,
,
,
,
,
,
, only need to obtain thus scattering parameter S
11e, S
21e, S
22e, S
22o, just can obtain the scattering parameter Closure equation.
Step 6: according to the even mould equivalent electric circuit of Fig. 2 (a), the ABCD-matrix obtained between Port1 and Port2 port is as follows:
According to the strange mould equivalent electric circuit of Fig. 2 (b), obtain the ABCD-matrix as follows:
Step 7: according to the ABCD-matrix, the following formula of S-Parametric Representation of the even mould of sealing and Qi Mo:
。
Step 8: in order to simplify the design parameter of power divider, we suppose Z
A=Z
B=Z
0, θ
1=θ
2=θ
3=θ obtains:
.
Step 9: for simultaneously, at two different Frequency point f1 and f2=qf1, q>=1, meet above equation on (q is frequency ratio), obtains the compactest circuit simultaneously, and the electrical length of each joint transmission line on these two Frequency points can be expressed as:
, can obtain relational expression thus
.According to the periodicity of trigonometric function, this relational expression has guaranteed that the formula of step 8 is immovable on these two Frequency points.
Step 10: Fig. 3 shows normalized characteristic impedance (Z
1, Z
2e, Z
2o, Z
3e, Z
3o) and isolation resistance R along with the variation tendency of frequency ratio q.When all normalized characteristic impedances are within 0.5 to 2.9 scope, corresponding frequency ratio scope is from 3.0 to 5.0.
Step 11: for the design of the circuit structure of verifying power divider of the present invention, we adopt sheet material (ε
r=2.55, H=1mm) realized a microstrip power divider that simultaneously is operated in 1GHz and 3.5GHz.In design process, our selected characteristic impedance Z
A=Z
B=Z
0=50 Ω.According to these known conditions, show that final design load is Z1=1.7575 * 50=87.87 Ω, Z2e=2.1792 * 50=108.97 Ω, Z2o=1.9374 * 50=96.74 Ω, Z3e=2.0566 * 50=102.83 Ω, Z3o=0.7763 * 50=38.82 Ω, R=2.8025 * 50=140.13 Ω.All transmission line electrical length θ 1=θ 2=θ 3=θ=Π/4.5.
Step 12: Fig. 4 has shown the photo in kind of this power divider, and its manufacturing dimension is 3.8cm * 5.7cm.
Step 13: Fig. 5 is the port reflection coefficient spectral characteristic of double frequency Wilkinson power divider of the present invention, calculated value and Entity measurement value (deriving from Agilent network analyzer N5230C).
First end oral reflex coefficient is S11, the second port reflection coefficient is S22, the 3rd port reflection coefficient is S33, because this power divider is the symmetry structure, known S22=S33, as can be seen from Figure 5, when two-frequency operation point 1GHz and 3.5GHz, all be less than-16dB of the amplitude of reflection coefficient of three ports, have port match characteristic preferably.
Step 14: Fig. 6 is port transmission coefficient and the isolating coefficient spectral characteristic of double frequency Wilkinson power divider of the present invention, calculated value and Entity measurement value (deriving from Agilent network analyzer N5230C).
The first port Port1 is to the transmission coefficient S21 of the second port Port2, the first port Port1 to the three port Port3 transmission coefficient S31, and because this power divider is the symmetry structure, known S21=S31; Isolating coefficient S23=S32 between the first port Port1 and the 3rd port Port3, as can be seen from Figure 6, when two-frequency operation point 1GHz/3.5GHz, the first port Port1 is to transmission coefficient value-3.11dB/-3.58dB of the second port Port2, power splitting/synthesis network and low transmission loss characteristic are preferably arranged, isolating coefficient value-21.51dB/-17.91dB of the second port Port2 to the three port Port3, have port isolation characteristic preferably.
The above can observe simulation result from Fig. 5 and Fig. 6 and test result is very identical.So the experimental result of this power divider has met final design requirement.The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. double frequency Wilkinson power divider of the present invention, its most important characteristics are structural designs of power divider, two output ports of traditional Wilkinson power divider are positioned at the two ends of isolation resistance, and two output ports of the present invention are away from isolation resistance, be positioned at the centre position of power divider, the input of the second port Port2 is connected in the junction of first branch's transmission line 3 and the 3rd branch's transmission line 5; The input of the 3rd port Port3 is connected in the junction of second branch's transmission line 4 and the 4th branch's transmission line 6; Design two open circuit minor matters simultaneously and be positioned at the connection of input port place, the minor matters of opening a way 1 one ends are connected in the junction of the first port Port1 and first branch's transmission line 3, other end open circuit; Open circuit minor matters 2 one ends are connected in the junction of the first port Port1 and second branch's transmission line 4, other end open circuit; The transfer of output port position is connected the design of two open circuit minor matters with input port, make Wilkinson power divider of the present invention have wider bandwidth of operation and larger frequency ratio under two-frequency operation.
2. power divider according to claim 1, adopt even mould and Qi Mo excitation analytical method, according to Fig. 2 (a), draws formula
, according to Fig. 2 (b), draw formula
.
3. power divider according to claim 1, as can be seen from Figure 1 the power divider structure is symmetrical, scattering parameter (S-parameter) draws following relation:
,
,
,
,
,
,
, only need to obtain thus scattering parameter S
11e, S
21e, S
22e, S
22o, just can obtain the scattering parameter Closure equation.
4. according to claim 1,2,3 described power dividers, suppose
,
, then formula of reduction draws:
Calculate thus all resistance values to the first port load impedance Z
ADo renormalization and process, obtain opening a way minor matters 1 and open circuit minor matters 2 characteristic impedance value Z1, the characteristic impedance value Z of first branch's transmission line 3 and second branch's transmission line 4
2eAnd Z
2o, the characteristic impedance value Z of the 3rd branch's transmission line 5 and the 4th branch's transmission line 6
3eAnd Z
3o, subscript e and o mean respectively even mould and Qi Mo, the resistance R of isolation resistance 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101578620A CN103427145A (en) | 2013-04-27 | 2013-04-27 | Novel double-frequency Wilkinson power divider design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101578620A CN103427145A (en) | 2013-04-27 | 2013-04-27 | Novel double-frequency Wilkinson power divider design |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103427145A true CN103427145A (en) | 2013-12-04 |
Family
ID=49651577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101578620A Pending CN103427145A (en) | 2013-04-27 | 2013-04-27 | Novel double-frequency Wilkinson power divider design |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103427145A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811063A (en) * | 2014-12-30 | 2016-07-27 | 鸿富锦精密工业（深圳）有限公司 | Power processing circuit, two-path amplification circuit and multipath amplification circuit |
| CN106299576A (en) * | 2016-08-24 | 2017-01-04 | 深圳天珑无线科技有限公司 | The acquisition methods of device parameters in a kind of power divider and power divider |
| CN111224207A (en) * | 2020-01-13 | 2020-06-02 | 电子科技大学 | Broadband power divider |
| CN111224206A (en) * | 2020-01-13 | 2020-06-02 | 电子科技大学 | Microstrip power divider with ultra-wide stop band |
| CN112821880A (en) * | 2020-12-25 | 2021-05-18 | 北京邮电大学 | Double-path double-frequency matching network |
| CN113871830A (en) * | 2020-06-30 | 2021-12-31 | 富华科精密工业（深圳）有限公司 | Balun structure and electronic device with same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1107349A1 (en) * | 1999-12-07 | 2001-06-13 | Marconi Communications GmbH | High-frequency power divider |
| CN202721250U (en) * | 2012-04-26 | 2013-02-06 | 中国科学院微电子研究所 | Hybrid power divider |
-
2013
- 2013-04-27 CN CN2013101578620A patent/CN103427145A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1107349A1 (en) * | 1999-12-07 | 2001-06-13 | Marconi Communications GmbH | High-frequency power divider |
| CN202721250U (en) * | 2012-04-26 | 2013-02-06 | 中国科学院微电子研究所 | Hybrid power divider |
Non-Patent Citations (2)
| Title |
|---|
| XIAOLONG WANG，IWATA SAKAGAMI，KENSAKU TAKAHASHI，SHINGO OKAMURA: "Dual-band Wilkinson Power Divider with Two Design Approaches", 《INTERNATIONAL CONFERENCE ON TRANSPORTATION, MECHANICAL, AND ELECTRICAL ENGINEERING (TMEE)，2011》 * |
| YOUNGCHAE SHIN，BYUNGJE LEE，MYUN-JOO PARK: "Dual-Band Wilkinson Power Divider With Shifted Output Ports", 《IEEE MICROWAVE AND WIRELESS》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811063A (en) * | 2014-12-30 | 2016-07-27 | 鸿富锦精密工业（深圳）有限公司 | Power processing circuit, two-path amplification circuit and multipath amplification circuit |
| CN106299576A (en) * | 2016-08-24 | 2017-01-04 | 深圳天珑无线科技有限公司 | The acquisition methods of device parameters in a kind of power divider and power divider |
| CN106299576B (en) * | 2016-08-24 | 2021-10-08 | 深圳天珑无线科技有限公司 | Power divider and method for acquiring device parameters in power divider |
| CN111224207A (en) * | 2020-01-13 | 2020-06-02 | 电子科技大学 | Broadband power divider |
| CN111224206A (en) * | 2020-01-13 | 2020-06-02 | 电子科技大学 | Microstrip power divider with ultra-wide stop band |
| CN113871830A (en) * | 2020-06-30 | 2021-12-31 | 富华科精密工业（深圳）有限公司 | Balun structure and electronic device with same |
| CN112821880A (en) * | 2020-12-25 | 2021-05-18 | 北京邮电大学 | Double-path double-frequency matching network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103427145A (en) | Novel double-frequency Wilkinson power divider design | |
| CN103259072B (en) | Ultra-wideband power divider based on exponential gradient | |
| Tang et al. | Analysis and design of compact and wide-passband planar crossovers | |
| Lin et al. | Compact filtering branch-line coupler with source-load coupling | |
| KR102124641B1 (en) | Multi-Band Power Divider | |
| Zhu et al. | Realization of extremely high and low impedance transforming ratios using cross-shaped impedance transformer | |
| CN108011168B (en) | Novel Wilkinson power divider capable of terminating complex impedance | |
| Taravati et al. | Generalised single-section broad-band asymmetrical Wilkinson power divider | |
| Zhou et al. | A novel UWB Wilkinson power divider | |
| Meng et al. | Direct synthesis of general Chebyshev bandpass filters with a frequency variant complex load | |
| CN103346373A (en) | Lumped-parameter broadband 180-degree coupler | |
| CN105226365A (en) | A kind of 16 points of power splitter Miniaturization Designs | |
| Qaroot et al. | Design methodology of multi-frequency unequal split Wilkinson power dividers using transmission line transformers | |
| Xu et al. | Design of an ultra‐wideband power divider with harmonics suppression | |
| Mencia-Oliva et al. | New technique for the design of ultra-broadband power dividers based on tapered lines | |
| Zhou et al. | A symmetrical two-way power divider with impedance transforming property | |
| Piacibello et al. | Generalized symmetrical 3 dB power dividers with complex termination impedances | |
| Arshad et al. | Investigation of wideband Wilkinson power divider using multi-section approach | |
| Ji et al. | A compact dual-band planar branch-line coupler | |
| Khalid et al. | Exact synthesis design theory of analogue broadband bandpass filter | |
| Then et al. | Compact microstrip S-band 90 hybrid coupler | |
| Han | A design method of microstrip directional coupler with multi-elements compensation | |
| CN104064845A (en) | Ultra-wide band six-path power divider based on resistance type | |
| Lu et al. | Design of dual-band branch-line coupler based on shunt open-circuit DCRLH cells | |
| KR20130091370A (en) | Dual-band filter using stepped-impedance and design method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131204 |