CN103633406A - Microstrip line power distributor of decimetric wave with equal distribution ratio - Google Patents
Microstrip line power distributor of decimetric wave with equal distribution ratio Download PDFInfo
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- CN103633406A CN103633406A CN201310630677.9A CN201310630677A CN103633406A CN 103633406 A CN103633406 A CN 103633406A CN 201310630677 A CN201310630677 A CN 201310630677A CN 103633406 A CN103633406 A CN 103633406A
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- microstrip
- cavity
- distribution ratio
- microstrip line
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Abstract
The invention relates to a microstrip line power distributor of a decimetric wave with an equal distribution ratio. The distributor comprises a micostrip line power distributor circuit of the decimetric wave with the equal distribution ratio arranged in a metal closed cavity. The micostrip line power distributor circuit of the decimetric wave with the equal distribution ratio comprises a microstrip line-designed circuit board with the equal distribution ratio, a closed metal cavity and a standard SMA interface and adopts a cavity metal structure as the shape; the internal microstrip made of a mounting circuit board is not processed by solder mask; the bottom layer of the printed board is paved on the ground with a large area; during mounting, the bottom of the structural cavity is fastened by using a bolt, full grounding is ensured, holes are formed in the side wall of the cavity; the standard SMA interface is mounted as the input/output interface of a signal; the whole design is based on the microwave theory without the adoption of any electrical device, the device cost is reduced, the work reliability is increased, passband fluctuation and isolation of the port completely meet normal applying conditions, and the microstrip line power distributor has the characteristics of being small, light, convenient, low in cost and the like.
Description
Technical field
The present invention relates to communication technical field, particularly the microstrip power divider of the distribution ratio such as a kind of decimeter wave.Power divider (abbreviation power splitter), for power division or power combination.Be that a kind of Jiang Yi road input signal energy is divided into two-way or multichannel output equates or the device of unequal energy, also can conversely the synthetic road of multiple signals energy be exported, now can be also referred to as mixer.Between the output port of a power splitter, should guarantee certain isolation.Power splitter is divided into one-to-two (two outputs of an input), three (three outputs of an input) in a minute etc. conventionally by output.In microwave radio field, in communication products, be a kind of functional module of often using.The design's power splitter has that small volume and less weight, working stability are reliable, the feature such as list, essentially no introducing noise between structure.
Background technology
In the forties in 20th century, miscellaneous waveguide type coupler and power divider are invented and moulded in ，MT SSRL.They comprise the forms such as E and the T-shaped knot of H slab guide, Bethe hole, porous location.In mid-term the 1950's, to the sixties, strip line or stripline technique have had development, and the increase of plane transmission line application, has also caused the exploitation of novel power divider.The design is theoretical based on microwave communication, does not adopt any electronic devices and components, only by the design of microstrip line being realized to the function of power division.
Summary of the invention
The object of the invention is to make power splitter reliable and stable in actual applications, reduce to introduce noise, reduce power splitter module volume, simplified structure, reduces costs.Complicated for power divider structure in current application, the problem that noise is high, is designed to passive power splitter, reduces device noise.Thereby in can application, save system cost, improve system works reliability, elevator system signal transmission quality.
The technical scheme that the present invention taked is to achieve these goals: the microstrip power divider of the distribution ratios such as decimeter wave, it is characterized in that: comprise the microstrip power divider circuit that is arranged on the distribution ratios such as a kind of decimeter wave in metal enclosed cavity, the microstrip power divider of the distribution ratios such as described decimeter wave comprise microstrip design etc. the SMA interface of wiring board, closed metal cavity and standard of distribution ratio;
The microstrip power divider external form of the distribution ratios such as described decimeter wave adopts cavity metal structure, the microstrip line of the inner circuit board making of installing does not add welding resistance to be processed, the floor file of circuit board Bottom layer large area, during mounting circuit boards, in structural lumen bottom, use screw fastening, guarantee abundant ground connection, cavity wall perforate, installation code SMA interface, signal input/output interface.
The microstrip power divider design cycle of the distribution ratios such as described flow process decimeter wave comprises:
A)
firstdetermine the key index item of required power splitter, for the power splitter of the distribution ratios such as decimeter wave is designed to;
B) theoretical in conjunction with microstrip line, determine relevant parameter, and carry out theoretical simulation, by actual conditions, suitably adjust parameter, until meet pre-provisioning request;
C) emulation reaches after requirement, can directly generate microstrip line domain, makes pcb board, and while making pcb board, the certain and simulation parameter of relevant parameter is consistent; Microstrip line printed board is packed in metallic cavity;
D) actual measurement, confirms that whether index meets, and if desired, revises, until meet the demands.
The invention has the beneficial effects as follows, by simulation software design of Simulation in early stage, provide theoretical reference and curve emulation, effectively saved design work amount.Material object manufacture is simple, and completely based on microwave theory, does not adopt any electrical property device, has saved device cost, has strengthened functional reliability, and passband fluctuation and interport isolation, meets conventional application conditions completely, have small and exquisite, light, the feature such as cost is low.
Accompanying drawing explanation
Fig. 1 is the transmission line circuit of equivalence of the present invention;
Fig. 2 is normalized power distributing circuit of the present invention;
Fig. 3 is design flow diagram of the present invention;
Fig. 4 is design and simulation curve chart a of the present invention;
Fig. 5 is design and simulation curve chart b of the present invention;
Fig. 6 is generation domain of the present invention;
Fig. 7 is shape assumption diagram of the present invention.
In figure: 1. microstrip line domain; 2. fastening structure screw; 3. input SMA interface; 4. the first via is exported SMA interface; 5 second tunnel output SMA interfaces; 6. metal enclosed cavity.
Embodiment
Below in conjunction with accompanying drawing, native system is described further.
As shown in Figure 1, be the transmission line circuit of equivalence of the present invention, the transmission line circuit of equivalence, it is a kind of like this network: when output port mates, it still has lossless useful properties, its reflection power that only dissipated.This distributor is often made micro-band or strip line form.
For the sake of simplicity, with all impedances of characteristic impedance Zo normalization, again draw circuit shown in Fig. 1, and connect voltage source at output port, form circuit as shown in Figure 2.
Figure 2 shows that normalized power distributing circuit of the present invention.
This network in form with transverse center plane symmetry, R1, two normalized resistance values of R2 are 2, the normalized resistance value composing in parallel is 1, represents the impedance in coupling source.R3, R4 are output port impedance, and normalized resistance value is 1.
So-called normalization is to make the numerical value of physical system change the relation of relative value into, so there is no unit, only represents relativeness.As mentioned above, with all impedances of Zo normalization, so defining Zo is 1, and the resistance after normalization is 2, represents 2*Zo.This is a kind of conventional analytical method, in order to simplify calculating, describes the problem clearly.
Quatrter-wavelength line has normalization characteristic impedance Z, and parallel resistance has normalized value r; Therefore for these values of decile power divider, erect image, as provided in Fig. 1 circuit, should be Z=
and r=2.
As shown in Figure 3, be design flow diagram of the present invention.
First determine the key index item of required power splitter, the present invention is mainly for the power splitter of the distribution ratios such as decimeter wave is designed to; Theoretical in conjunction with microstrip line, determine relevant parameter, and carry out theoretical simulation, by actual conditions, suitably adjust parameter, until meet pre-provisioning request; Emulation reaches after requirement, can directly generate microstrip line domain, manufactures pcb board, and while making pcb board, the certain and simulation parameter of relevant parameter is consistent; Microstrip line printed board is packed in metallic cavity, and actual measurement, confirms that whether index meets, and if desired, can suitably revise, until meet the demands.
As shown in Figure 4, Figure 5, be design and simulation curve chart of the present invention.
According to designing requirement and theoretical calculating, and the relevant parameter that the feasibility when the actual making sheet arranges microstrip line parameter control with reference to microstrip line domain H=0.8mm, Er=4.3, Mur=1, Cond=5.88E+7, Hu=1.0e+33mm, T=0.03mm, TanD=1e-4, Rough=0mm in this way.
Except dielectric material and the setting of metal material characterisitic parameter, also need to arrange the dimensional parameters of every section of microstrip line, theory analysis by power splitter can know, the characteristic impedance Z 0 of input port transmission line should be 50 Ω, and the characteristic impedance of two branch road transmission lines is 70.7 Ω.
And calculate live width and the line length that electrical length is λ/4 transmission line.
Set after relevant parameter, can judge whether to meet design requirement by emulation, as curve S in Fig. 4 (2,1) can find out, output port power meets theoretical value compared with the little 3dB of input port power, and within the scope of bandwidth 1.3GHz-1.7GHz, the difference of passband fluctuation extreme value maximal and minmal value is (3.121-3.088)=0.033dB.Passband fluctuation is enough little.
Isolation worst-case value between port 2 as known in curve S in Fig. 5 (2,3) and port 3 is 20.44dB, meets conventional requirement.
In summary, this design meets conventional requirement, reaches design objective.
If Fig. 6 is generation domain of the present invention.After having designed, can according to designing requirement, directly manufacture pcb board directly by generating microstrip line domain, seem simple several microstrip lines, but comprise complicated microwave theory design, when making sheet, must guarantee that the selection of dielectric constant and relevant parameter is correct.
If Fig. 7 is shape assumption diagram of the present invention.Microstrip design is complete, is installed on cavity metal structure, and inner institute mounting circuit boards is made microstrip line and do not added welding resistance processing, and the floor file of printed board Bottom layer large area is used screw fastening in structural lumen bottom when circuit board is installed, and guarantees abundant ground connection.Cavity wall perforate, installation code SMA interface, signal input/output interface.This design is using power splitter as an application module independently, easy to use, has well shielded again outer signals interference, has guaranteed the reliability of practical application.
According to the above description, in conjunction with art technology, can realize the solution of the present invention.
Claims (3)
1. the microstrip power divider of the distribution ratio such as decimeter wave, it is characterized in that: comprise the microstrip power divider circuit that is arranged on the distribution ratios such as a kind of decimeter wave in metal enclosed cavity, the microstrip power divider of the distribution ratios such as described decimeter wave comprise microstrip design etc. the SMA interface of wiring board, closed metal cavity and standard of distribution ratio;
The microstrip power divider external form of the distribution ratios such as described decimeter wave adopts cavity metal structure, the microstrip line of the inner circuit board making of installing does not add welding resistance to be processed, the floor file of circuit board Bottom layer large area, during mounting circuit boards, in structural lumen bottom, use screw fastening, guarantee abundant ground connection, cavity wall perforate, installation code SMA interface, signal input/output interface;
The design cycle of the microstrip power divider of the distribution ratios such as described flow process decimeter wave comprises:
A)
firstdetermine the key index item of required power splitter, for the power splitter of the distribution ratios such as decimeter wave is designed to;
B) theoretical in conjunction with microstrip line, determine relevant parameter, and carry out theoretical simulation, by actual conditions, suitably adjust parameter, until meet pre-provisioning request;
C) emulation reaches after requirement, can directly generate microstrip line domain, makes pcb board, and while making pcb board, the certain and simulation parameter of relevant parameter is consistent; Microstrip line printed board is packed in metallic cavity;
D) actual measurement, confirms that whether index meets, and if desired, revises, until meet the demands.
2. the microstrip power divider of the distribution ratio such as decimeter wave according to claim 1, is characterized in that: global design does not adopt any electronic devices and components, only based on microwave theory by the design of microstrip line being realized to the function of power division.
3. the microstrip power divider of the distribution ratio such as decimeter wave according to claim 1, is characterized in that: adopt metallic cavity enclosed package, shielding noise jamming.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310630677.9A CN103633406A (en) | 2013-12-02 | 2013-12-02 | Microstrip line power distributor of decimetric wave with equal distribution ratio |
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| CN201310630677.9A CN103633406A (en) | 2013-12-02 | 2013-12-02 | Microstrip line power distributor of decimetric wave with equal distribution ratio |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611548A (en) * | 2017-09-16 | 2018-01-19 | 天津大学 | A kind of microwave power divider and preparation method based on flexible substrate |
| 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 |
| CN115000665A (en) * | 2022-05-27 | 2022-09-02 | 哈尔滨工程大学 | Accurate correction method for power division frequency band of Wilkinson power divider |
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| JP2006108741A (en) * | 2004-09-30 | 2006-04-20 | Toshiba Corp | High-frequency power distributor/combiner |
| WO2008128508A1 (en) * | 2007-04-18 | 2008-10-30 | Christian-Albrechts-Universität Zu Kiel | Switchable hf power splitter |
| CN101656343A (en) * | 2009-09-11 | 2010-02-24 | 电子科技大学 | Power divider with new structure |
| CN202721251U (en) * | 2012-06-29 | 2013-02-06 | 安徽华东光电技术研究所 | X-band miniature micro-strip power divider |
| CN103000977A (en) * | 2012-11-16 | 2013-03-27 | 北京航空航天大学 | Broadband novel microstrip line three-way power divider |
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2013
- 2013-12-02 CN CN201310630677.9A patent/CN103633406A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006108741A (en) * | 2004-09-30 | 2006-04-20 | Toshiba Corp | High-frequency power distributor/combiner |
| WO2008128508A1 (en) * | 2007-04-18 | 2008-10-30 | Christian-Albrechts-Universität Zu Kiel | Switchable hf power splitter |
| CN101656343A (en) * | 2009-09-11 | 2010-02-24 | 电子科技大学 | Power divider with new structure |
| CN202721251U (en) * | 2012-06-29 | 2013-02-06 | 安徽华东光电技术研究所 | X-band miniature micro-strip power divider |
| CN103000977A (en) * | 2012-11-16 | 2013-03-27 | 北京航空航天大学 | Broadband novel microstrip line three-way power divider |
Non-Patent Citations (1)
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| 何猛: "超宽带微波功分器的研制", 《中国优秀硕士学位论文全文数据库信息科技辑》, 31 March 2012 (2012-03-31) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611548A (en) * | 2017-09-16 | 2018-01-19 | 天津大学 | A kind of microwave power divider and preparation method based on flexible substrate |
| 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 |
| CN115000665A (en) * | 2022-05-27 | 2022-09-02 | 哈尔滨工程大学 | Accurate correction method for power division frequency band of Wilkinson power divider |
| CN115000665B (en) * | 2022-05-27 | 2024-02-06 | 哈尔滨工程大学 | Accurate correction method for power frequency division band of Wilkinson power divider |
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Application publication date: 20140312 |