CN102324597A - Microwave frequency band orthogonal analog converter and signal separating/combining method thereof - Google Patents
Microwave frequency band orthogonal analog converter and signal separating/combining method thereof Download PDFInfo
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Abstract
The invention discloses a microwave frequency band orthogonal analog converter, which comprises a public wave guide, a main terminal wave guide and a secondary terminal wave guide, wherein the public wave guide and the main terminal wave guide are communicated with each other to form a straight arm branch used for transmitting a first polarized signal; the axis of the public wave guide and the axis of the secondary terminal wave guide are vertically arranged mutually to form a bent arm branch for transmitting a second polarization signal; the converter is an integrally-molded piece; a step wave guide group for completing signal matching is arranged between the public wave guide and the main terminal wave guide, and comprises at least one stage of step wave guide; and the bent arm branch is provided with a coupling window which is used for realizing signal coupling between the at least one stage of step wave guide of the step wave group and the secondary terminal wave guide. The invention further discloses a corresponding signal separating/combining method. Due to the adoption of the invention, high-isolation-degree transmission of signals can be ensured; and moreover, a product has a simple and compact structure and is easy for entire processing, the performance is ensured, the processing and assembling time is saved, and batch product is facilitated.
Description
[technical field]
The present invention relates to a kind of microwave passive component, relate in particular to a kind of microwave frequency band orthomode transducer, correspondingly, also relate to its signal separating method and signal path combining method.
[background technology]
Microwave communication is one of wireless communication means commonly used in the world at present, is widely used in fields such as transfer of data, radio and television transmission, satellite communication, mobile communication.Orthomode transducer is the outdoor three-port network device of wireless transmission product, the outer dual polarized antenna of junction chamber and two outdoor units (ODU), and promptly two transceiver channels are through the shared antenna of orthomode transducer.Orthomode transducer has the function of polarization separation.
Orthomode transducer connects antenna and ODU unit; Its existence will inevitably bring loss to increase; Standing-wave ratio uprises, thereby reduces the antenna system machine performance, so the design of orthomode transducer will make orthomode transducer under the assigned work condition, satisfy system requirements exactly.
In order to ensure better performance is arranged, need guarantee that when design orthomode transducer is structurally symmetrical fully.For such orthomode transducer, though better performances, complex structure, cost is higher and be unfavorable for producing in batches.
For example can know by disclosed a kind of unit microwave antenna feeder equipment of CN101872901A patent announcement and manufacturing approach thereof; Itself since existence of dielectric ring cause can not integrated molding; And it is very complicated to be made from multiple components the such structure of integral body; Assembly cost is high, and debug time is long, and requirement on machining accuracy is too high.
[summary of the invention]
Therefore, primary and foremost purpose of the present invention is to overcome above-mentioned deficiency, and a kind of microwave frequency band orthomode transducer is provided, and realizes the coupling transmission respectively under high-isolation of two kinds of polarized signals with simple, compact structure, whole processing, and cost is lower, is beneficial to batch process.
Another object of the present invention is corresponding with this primary and foremost purpose, and a kind of signal separating method of microwave frequency band orthomode transducer is provided, and is used to realize the transmission of high-isolation Signal Separation.
A purpose more of the present invention is also corresponding with this primary and foremost purpose, and a kind of signal path combining method of microwave frequency band orthomode transducer is provided, and is used to realize that the high-isolation signal closes the road transmission.
For realizing the object of the invention, the present invention adopts following technical scheme:
Be applicable to a kind of microwave frequency band orthomode transducer of primary and foremost purpose of the present invention; Comprise common waveguide, master terminal waveguide and time terminal waveguide; Common waveguide and master terminal waveguide are straight-through to be provided with to be formed for transmitting the straight-arm branch of first polarized signal; Common waveguide and time terminal waveguide with each other axis normal setting being formed for transmitting the folding arm branch of second polarized signal, this transducer part that is formed in one; Be provided with the step waveguide group that is used to accomplish Signal Matching between said common waveguide and the master terminal waveguide, this step waveguide group comprises one-level step waveguide at least; Said folding arm branch is provided with coupling window, is used between the step waveguide of one-level at least of said step waveguide group and time terminal waveguide, realizing the signal coupling.Be provided with at least one joint signal transformation section between said coupling window and said the terminal waveguide.
Disclose according to embodiments of the invention, can be the non co axial setting between common waveguide, step waveguide group and the master terminal waveguide of said straight-arm branch.Also can be the non co axial setting between said coupling window, transforming section and time terminal waveguide.
Preferable, the axis of said public port, step waveguide group, master terminal waveguide, coupling window, transforming section and the waveguide of inferior terminal all is in same plane, and this transducer is symmetrical structure about this plane.
Preferable, said common waveguide is non-circular waveguide, said master terminal waveguide is rectangular waveguide with time terminal waveguide.
Be applicable to the signal separating method of a kind of microwave frequency band orthomode transducer of another object of the present invention; Its two-way polarized signal with public passage in the orthomode transducer is realized separating to be transferred to main split's passage and time branched bottom respectively, it is characterized in that comprising the steps:
1) matching effect through one-level step waveguide at least matches first polarized signal in the public passage in main split's passage and transmits, and wherein second polarized signal ends at main split passage place;
2) matching effect through the step of the one-level at least waveguide in the waveguide of the said step of one-level at least matches second polarized signal in the public passage in time branched bottom and transmits, and wherein first polarized signal ends at inferior branched bottom place.
Further; Preset two-stage or the above step waveguide of two-stage are used to accomplish the Signal Matching between public passage and the main split's passage, and the Signal Matching between public passage and time branched bottom is coupled by a part of step waveguide of coupling window from the step waveguide more than the said two-stage and gets.
Be applicable to a kind of microwave frequency band orthomode transducer signal path combining method of still a further object of the present invention, its each one road polarized signal with main split's passage in the orthomode transducer and time branched bottom closes the road in public passage, it is characterized in that comprising the steps:
1) matching effect through one-level step waveguide at least matches first polarized signal in main split's passage in the public passage and transmits, and wherein second polarized signal ends at main split passage place;
2) matching effect through the step of the one-level at least waveguide in the waveguide of the said step of one-level at least matches second polarized signal in the inferior branched bottom in the public passage and transmits, and wherein first polarized signal ends at inferior branched bottom place.
Further; Preset two-stage or the above step waveguide of two-stage are used to accomplish the Signal Matching between public passage and the main split's passage, and the Signal Matching between public passage and time branched bottom is coupled by a part of step waveguide of coupling window from the step waveguide more than the said two-stage and gets.
Compared with prior art, the present invention has following advantage:
At first, the microwave frequency band orthomode transducer that the present invention proposes owing to adopted the design of step waveguide type, makes that the polarized signal between non-circular waveguide and the rectangular waveguide is well mated; Between coupling window and rectangular waveguide, adopt transforming section, make another polarized signal in broad frequency band, obtain coupling, thereby two kinds of polarized signals that guarantee orthomode transducer all possess electrical property preferably in wider frequency;
Secondly, microwave frequency band orthomode transducer of the present invention is simple in structure, compact, adopts integral processing; Through adopting non-circular and waveguide rectangle, can carry out the non co axial setting, reduce the physics tolerance of bringing when orthomode transducer adds man-hour and artificially assembles so greatly; Improve the isolation between main split's passage and the inferior branched bottom, thereby guarantee its overall performance, and save artificial assembling; Improve product percent of pass and production efficiency again, be beneficial to batch process;
Moreover; Big fillet or arc processing are all adopted in the narrow limit of step waveguide, coupling window and transforming section in the orthomode transducer structure of the present invention; Can process with the comparatively big milling cutter of diameter; So not only saved process time but also guaranteed that thereby processing precision of products improves product percent of pass, was beneficial to batch process.
[description of drawings]
Fig. 1 in order more to clearly illustrate its internal structure, is illustrated as two parts up and down with it for the package assembly sketch map of microwave frequency band orthomode transducer structure of the present invention especially;
Fig. 2 is the stereogram of microwave frequency band orthomode transducer of the present invention, and it mainly discloses the visual angle of common waveguide end face;
Fig. 3 is the stereogram of microwave frequency band orthomode transducer of the present invention, and it mainly discloses time visual angle of terminal Waveguide end face;
Fig. 4 is the stereogram of microwave frequency band orthomode transducer of the present invention, and it mainly discloses the visual angle of master terminal Waveguide end face.
[embodiment]
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Consult Fig. 1 to Fig. 4; Microwave frequency band orthomode transducer of the present invention; For drawing the cavity devices of cavity configuration, comprise non-circular waveguide 11, first order step waveguide 201, second level step waveguide 202, third level step waveguide 203, straight-arm branch rectangular waveguide 22, coupling window 301, transforming section 302 and folding arm branch rectangular waveguide 33.This a plurality of step waveguides 201,202,203 are common to constitute step waveguide groups, and the exponent number of step waveguide in the step waveguide group can be one-level, secondary even more multistage, depends on the electrical demand of orthomode transducer and decides.Said non-circular waveguide 11 is used as common waveguide, and straight-arm branch rectangular waveguide 22 uses as the master terminal waveguide, and folding arm branch rectangular waveguide 33 uses as time terminal waveguide.A typical shape of said non-circular waveguide 11 is as shown in Figure 2, and it is square, and four jiaos are round-corner transition; In other embodiments, non-circular waveguide 11 can be done suitable shapes and improved, and for example its each bar limit can be suitable radian.
Among Fig. 1; For being illustrated more clearly in the internal structure of transducer; Microwave frequency band orthomode transducer of the present invention is broken away into laterally zygomorphic wave-guide cavity wave 101 and the following wave-guide cavity wave 102 gone up; This diagram does not influence the present invention this transducer is defined as the fact of drawing cavity configuration integrated molding spare, and hence one can see that, and the diagram of Fig. 2 to Fig. 4 is true near product more.
Said non-circular waveguide 11, step waveguide group and rectangular waveguide 22 be straight-through to be provided with common formation straight-arm branch, and as preferred embodiment, their axis is not coaxial, is used to transmit first polarized signal; At least the one-level step waveguide of said non-circular waveguide 11, step waveguide group, coupling window 301, transforming section 302 and rectangular waveguide 33 be common to constitute folding arm branch; Be used to transmit second polarized signal; Coupling window 301 wherein, transforming section 302 and rectangular waveguide 33 are in like manner as preferred embodiment; Their dead in line, they constitute the folding arm branch of this folding arm branch jointly.
Three steps from said non-circular waveguide 11 toward said straight-arm branch rectangular waveguide 22 directions are used to mate polarized signal; Said non-circular waveguide 11, three grades of step waveguides 201,202,203 are dug on the wall of its same side and are established said coupling window 301; Coupling window 301 occupies non-circular waveguide 11 and one-level step waveguide at least, is coupled in the folding arm branched bottom with second polarized signal that will get into said non-circular waveguide 11; 33 of said coupling window 301 and said folding arm branch rectangular waveguides carry out Signal Matching through a transforming section 302; The central axis of coupling window 301, transforming section 302 and the rectangular waveguide 33 of said folding arm branch is coaxial setting.
Concrete like Fig. 1, described non-circular waveguide 11, first order step waveguide 201, second level step waveguide 202, the waveguide 203 of third level step and rectangular waveguide 22 formation straight-arm branched bottoms are to transmit first polarized signal; Form the folding arm branched bottom to transmit second polarized signal by said non-circular waveguide 11, first order step waveguide 201, second level step waveguide 202, coupling window 301, transforming section 302 and rectangular waveguide 33; The signal of three different polarization of physical port transmitting two paths, therefore, orthomode transducer is equivalent to have four ports on electrical property.
Microwave frequency band orthomode transducer of the present invention separates signal when receiving signal, and its corresponding signal separating method is:
Be transferred to first polarized signal in formed main split of the straight-arm branch passage for needs; The public passage that this polarized signal forms from said non-circular waveguide 11; Rectangular waveguide 22 places that match main split's channel end that said straight-arm branch forms through said three grades of step waveguides 201,202,203 accomplish the transmission of first polarized signal; It is enough narrow to retrain said coupling window 301 narrow limits, makes inferior branched bottom that said first polarized signal forms in folding arm branch, specifically is that said coupling window 301 places end;
Simultaneously; For second polarized signal; Through said coupling window 301 this polarized signal is coupled to formed branched bottom of folding arm branch from public passage; And this polarized signal at said main split passage, specifically be that straight-arm branch rectangular waveguide 22 places are in like manner restrained to end, the effect of coupling is played in said first order step waveguide 201, second level step waveguide 202 between inferior branched bottom and public passage.
Microwave frequency band orthomode transducer of the present invention closes the road to signal when sending signal, its corresponding signal path combining method is:
For first polarized signal that is derived from formed main split of the straight-arm branch passage; The main split's passage that this polarized signal is belonged to from said rectangular waveguide 22 through said three grades of step waveguides 203,202,201 matches said non-circular waveguide 11 place public passages; And this polarized signal ends at said coupling window 301 places, accomplishes the transmission of signal;
Simultaneously; For second polarized signal in formed branched bottom of folding arm branch; From inferior branched bottom at said rectangular waveguide 33 places successively through behind part or all of said transforming section 302, said coupling window 301 and the said three grades of step waveguides; Match said non-circular waveguide 11, and this polarized signal ends at said rectangular waveguide 22 places.
This shows that microwave frequency band orthomode transducer of the present invention can realize that the two-way polarized signal is transferred to port separately by separately passage coupling respectively under the prerequisite of high-isolation, thereby realizes the purpose of the low cross-matched transmission of two-way orthogonally polarized signal.
Here there is a problem; Said three grades of step waveguides 201,202,203 will be satisfied the coupling of polarized signal in the straight-arm branch; The coupling that another polarized signal in the folding arm branch is also participated in first order step waveguide 201 in said three grades of step waveguides simultaneously and second level step waveguide 202; And its third level step waveguide 203 will end this road polarized signal in the folding arm branch metric shape waveguide 22, therefore, take all factors into consideration the three grades of steps 201,202 and 203 in said three grades of step waveguides.The signal of the narrow limit size of said folding arm branch coupling window 301 in can the said non-circular waveguide 11 of influence is coupled to the folding arm branched bottom, and be simultaneously also influential to the coupling of said straight-arm branched bottom signal, the consideration of therefore will compromising.
For the processing and the assurance machining accuracy that are easy to orthomode transducer, the semi arch body processing of two symmetries can be adopted in the narrow limit of the waveguide of second level step described in the orthomode transducer of the present invention 202, in detail can be with reference to figure 1.
The performance impact of the size pair of orthogonal weighted-voltage D/A converter of said coupling window 301 is bigger, so coupling window 301 described in the orthomode transducer of the present invention can adopt the semi arch body processing of two symmetries, or itself is exactly the cavity with lead angle, to guarantee its machining accuracy.
In sum, the microwave frequency band orthomode transducer that the present invention proposes adopts the mode of step coupling in non-circular waveguide, coupling window and the waveguide and usefulness; Improve its Signal Separation and path combining method, guarantee the high-isolation transmission of signal, make the product structure compact; Be easy to whole processing, in guaranteed performance, save process time again; Save the manpower installation time, help product lot quantity production.
The present invention has produced undocumented formal product in millimere-wave band, performance test is good, satisfies market demands.
Although the present invention only provides above embodiment; But; Those skilled in the art in conjunction with common practise, should be able to associate more embodiment after reading over this specification; But such embodiment is the spirit of unconventional claim of the present invention not, any type ofly is equal to replacement or simple modification all should be regarded as the included embodiment by the present invention.
Claims (10)
1. microwave frequency band orthomode transducer; Comprise common waveguide, master terminal waveguide and time terminal waveguide; Common waveguide and master terminal waveguide are straight-through to be provided with to be formed for transmitting the straight-arm branch of first polarized signal; Common waveguide and time terminal waveguide, is characterized in that to be formed for transmitting the folding arm branch of second polarized signal with each other axis normal setting:
This transducer part that is formed in one;
Be provided with the step waveguide group that is used to accomplish Signal Matching between said common waveguide and the master terminal waveguide, this step waveguide group comprises one-level step waveguide at least;
Said folding arm branch is provided with coupling window, is used between the step waveguide of one-level at least of said step waveguide group and time terminal waveguide, realizing the signal coupling.
2. microwave frequency band orthomode transducer according to claim 1 is characterized in that, is the non co axial setting between common waveguide, step waveguide group and the master terminal waveguide of said straight-arm branch.
3. microwave frequency band orthomode transducer according to claim 1 is characterized in that, is provided with at least one joint signal transformation section between said coupling window and said the terminal waveguide.
4. microwave frequency band orthomode transducer according to claim 3 is characterized in that, is the non co axial setting between said coupling window, transforming section and time terminal waveguide.
5. according to any described microwave frequency band orthomode transducer in the claim 1 to 4; It is characterized in that; The axis of said common waveguide, step waveguide group, master terminal waveguide, coupling window, transforming section and the waveguide of inferior terminal all is in same plane, and this transducer is symmetrical structure about this plane.
6. according to any described microwave frequency band orthomode transducer in the claim 1 to 4, it is characterized in that said common waveguide is non-circular waveguide, said master terminal waveguide is rectangular waveguide with time terminal waveguide.
7. the signal separating method of a microwave frequency band orthomode transducer, its two-way polarized signal with public passage in the orthomode transducer is realized separating to be transferred to main split's passage and time branched bottom respectively, it is characterized in that comprising the steps:
1) matching effect through one-level step waveguide at least matches first polarized signal in the public passage in main split's passage and transmits, and wherein second polarized signal ends at main split passage place;
2) matching effect through the step of the one-level at least waveguide in the waveguide of the said step of one-level at least matches second polarized signal in the public passage in time branched bottom and transmits, and wherein first polarized signal ends at inferior branched bottom place.
8. signal separating method according to claim 7; It is characterized in that; Preset two-stage or the above step waveguide of two-stage are used to accomplish the Signal Matching between public passage and the main split's passage, and the Signal Matching between public passage and time branched bottom is coupled by a part of step waveguide of coupling window from the step waveguide more than the said two-stage and gets.
9. the signal path combining method of a microwave frequency band orthomode transducer, its each one road polarized signal with main split's passage in the orthomode transducer and time branched bottom closes the road in public passage, it is characterized in that comprising the steps:
1) matching effect through one-level step waveguide at least matches first polarized signal in main split's passage in the public passage and transmits, and wherein second polarized signal ends at main split passage place;
2) matching effect through the step of the one-level at least waveguide in the waveguide of the said step of one-level at least matches second polarized signal in the inferior branched bottom in the public passage and transmits, and wherein first polarized signal ends at inferior branched bottom place.
10. signal path combining method according to claim 9; It is characterized in that; Preset two-stage or the above step waveguide of two-stage are used to accomplish the Signal Matching between public passage and the main split's passage, and the Signal Matching between public passage and time branched bottom is coupled by a part of step waveguide of coupling window from the step waveguide more than the said two-stage and gets.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633398A (en) * | 2012-08-24 | 2014-03-12 | 京信通信系统（中国）有限公司 | Orthogonal mode converter |
| CN104505564A (en) * | 2014-12-17 | 2015-04-08 | 科大智能（合肥）科技有限公司 | Dual polarization filter for microwave communication system ODU (Outdoor Unit) |
| CN104538719A (en) * | 2015-02-04 | 2015-04-22 | 上海航天测控通信研究所 | Broadband ortho-mode coupler |
| CN104617359A (en) * | 2015-02-16 | 2015-05-13 | 成都赛纳赛德科技有限公司 | Orthogonal mode adaptor |
| CN106602194A (en) * | 2016-11-09 | 2017-04-26 | 迈特通信设备（苏州）有限公司 | E-H conversion waveguide apparatus |
| CN110380162A (en) * | 2019-08-16 | 2019-10-25 | 郑州大学 | A kind of novel integrating filtering waveguide orthomode transducer |
| CN111883894A (en) * | 2020-07-31 | 2020-11-03 | 中国电子科技集团公司第五十四研究所 | Broadband H-surface T-shaped waveguide |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103633398A (en) * | 2012-08-24 | 2014-03-12 | 京信通信系统（中国）有限公司 | Orthogonal mode converter |
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| CN104505564A (en) * | 2014-12-17 | 2015-04-08 | 科大智能（合肥）科技有限公司 | Dual polarization filter for microwave communication system ODU (Outdoor Unit) |
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| CN106602194A (en) * | 2016-11-09 | 2017-04-26 | 迈特通信设备（苏州）有限公司 | E-H conversion waveguide apparatus |
| CN106602194B (en) * | 2016-11-09 | 2022-02-18 | 迈特通信设备（苏州）有限公司 | E-H conversion waveguide device |
| CN110380162A (en) * | 2019-08-16 | 2019-10-25 | 郑州大学 | A kind of novel integrating filtering waveguide orthomode transducer |
| CN111883894A (en) * | 2020-07-31 | 2020-11-03 | 中国电子科技集团公司第五十四研究所 | Broadband H-surface T-shaped waveguide |
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Application publication date: 20120118 |