CN110137633A - A kind of low passive intermodulation waveguide flange conversion equipment - Google Patents
A kind of low passive intermodulation waveguide flange conversion equipment Download PDFInfo
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- CN110137633A CN110137633A CN201910329798.7A CN201910329798A CN110137633A CN 110137633 A CN110137633 A CN 110137633A CN 201910329798 A CN201910329798 A CN 201910329798A CN 110137633 A CN110137633 A CN 110137633A
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- convex body
- metal convex
- passive intermodulation
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- waveguide
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
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Abstract
The present invention discloses a kind of low passive intermodulation waveguide flange conversion equipment, and by constructing two-sided periodical metal unit array, in conjunction with mechanical support structure, being formed between common waveguide flange face, there is the non-contact transition of two-sided the air gap to connect.Structure type, size and the air gap size of periodical metal unit are determined by particular step, obtain suitable electromagnetic forbidden band characteristic, guarantee that electromagnetic wave can not be revealed from the air gap, while not influencing electromagnetic wave normal transmission, realize inside non-contactization of waveguide transition connection, the metal contact nonlinear of conventional waveguide flanged joint is substantially eliminated, realizes low passive intermodulation performance.The mentioned conversion equipment of the present invention can be realized low passive intermodulation transition and conversion, have preferable versatility without changing former waveguide flange structure.The mentioned device of the present invention has wideband operation characteristic simultaneously, and corresponding waveguide work bandwidth can be completely covered, can be applied in various high-power low-intermodulation microwave components and test macro.
Description
Technical field
The present invention relates to a kind of low passive intermodulation waveguide flange conversion equipments, can be used in various high-power low passive intermodulations
In microwave component and test macro, belong to microwave technical field.
Background technique
Passive intermodulation (Passive Intermodulation, PIM) effect is the important interference of one of communication system
Phenomenon is widely present in various HIGH-POWERED MICROWAVES passive components and connection structure.In order to guarantee the normal work of communication system,
Effective passive intermodulation braking measure need to be taken.Generate passive intermodulation dominant mechanism be contact nonlinear and material nonlinearity,
Wherein material nonlinearity can by select suitable material avoid, and contact nonlinear be then prevalent in various microwaves without
In source structure.Waveguiding structure is one of structure type most widely used in various HIGH-POWERED MICROWAVES systems, and waveguide flange connects
Connecing is the primary factor that passive intermodulation is generated in waveguiding structure, and currently used standard waveguide flange uses physical connection mode,
The coupling part of flange can cause to contact due to the presence of many factors such as plating, roughness, dirty and material interface transition
It is non-linear, to generate passive intermodulation effect.
The current existing passive intermodulation braking measure for waveguide flange mainly has high pressure flange and deielectric-coating isolation side
Formula.High pressure flange is other than increasing press platform structure, it is also necessary to guarantee the sufficiently high finish of contact surface and the fastening of accurate torque, it is right
There is very high requirement in processing and assembling, and since there is contacts, contact nonlinear can not be inherently eliminated, existed
Long-term reliability problems.Deielectric-coating isolation method is not possible at present due to integrity problem in actual product.
In addition, presently, there are chokes (choke) formula flange, although avoiding a part of electrical contact, due to its master
Wanting structure is quarter-wave choke groove, cannot achieve broadband performance, bandwidth of operation is relatively narrow, is also restricted in practical application.
Patent " a kind of low passive intermodulation waveguide flange and design method " proposes the low passive intermodulation based on non-contact electromagnetic bandgap structure
Waveguide flange can effectively inhibit contact nonlinear, and bandwidth of operation is very wide.But the mentioned structure of the patent and method need
Change original waveguide flange structure, versatility is poor in practical applications, can correspondingly generate relatively high cost.
Summary of the invention
Technical problem solved by the present invention is overcome the deficiencies in the prior art, proposes a kind of low passive intermodulation waveguide method
Blue conversion equipment, by constructing two-sided periodical metal unit array, in conjunction with mechanical support structure, common waveguide flange face it
Between formed there is the non-contact transition of two-sided the air gap to connect, by particular design step, guarantee that electromagnetic wave is normal along waveguide
Transmission reduces the electrical-contact area of conventional waveguide flange, eliminates metal contact nonlinear, effectively inhibit nothing without revealing
Source intermodulation effect.
The technical solution of the invention is as follows: a kind of low passive intermodulation waveguide flange conversion equipment, including support plate, week
Phase property metal convex body array and mechanical support structure；The periodicity metal convex body array is by several metal convex bodys according to setting
It is ordered in the tow sides of support plate；The edge of support plate tow sides, machine is arranged in mechanical support structure
The surface of tool support construction is respectively higher than the surface of respective cycle metal convex body array.
Metal convex body in the periodicity metal convex body array is any regular shape, the metal being in the same plane
The height and structure type of convex body are consistent.
The mechanical support structure is not overlapped with periodical metal convex body array.
Reserve waveguide transmission mouth and screw fixed hole on the support plate and mechanical support structure, positions and dimensions with
Corresponding standard waveguide flange face is identical.
The structure type of the mechanical support structure is totally-enclosed, semiclosed or Open architecture.
Size, the spacing of adjacent two metals convex body of each metal convex body, described in the periodicity metal convex body array
Mechanical support structure surface and the preparation method of the difference in height of respective cycle metal convex body array surface are as follows:
Step 1: the emulation mould of single metal convex body in periodical metal convex body array is established in Electromagnetic Simulation program
Dimensional parameters initial value is arranged in type, and dimensional parameters include the size of each metal convex body, the spacing of adjacent two metals convex body, machinery
The difference in height on support construction surface and respective cycle metal convex body array surface；Periodic boundary condition is set, is arranged intrinsic
Solution model；
Step 2: it is solved by characteristic value and obtains dispersion characteristic curve, each size parameter values are adjusted, so that dispersion characteristics
Frequency forbidden band in curve is fallen within the scope of required working band；
Step 3: according to each size parameter values of acquisition, the low passive intermodulation wave is established in Electromagnetic Simulation program
Inducing defecation by enema and suppository orchid conversion equipment connect with waveguide flange after whole simulation model；
Step 4: setting transimission power, simulated electric field distribution character are convex according to transimission power size selection cycle metal
The quantity of metal convex body in volume array；
Step 5: emulation obtains Insertion Loss and standing wave as a result, each dimensional parameters are adjusted, so that in entire waveguide work bandwidth
Interior, standing wave and insertion loss performance are all satisfied requirement.
In the step 1, the difference in height on the surface of mechanical support structure and corresponding periodical metal convex body array surface
Quarter-wave corresponding less than working frequency.
The advantages of the present invention over the prior art are that:
(1) present invention is by constructing two-sided periodical metal unit array, in conjunction with mechanical support structure, in conventional wave inducing defecation by enema and suppository
Internal non-contacting transition connection is realized between orchid, reduces the electrical-contact area of conventional waveguide flange, it is non-to eliminate contact
Linearly, passive intermodulation effect is effectively inhibited.
(2) present invention determines structure type, size and the air gap size of periodical metal unit by particular step,
It obtains suitable electromagnetic forbidden band characteristic, realizes the constraint to electromagnetic wave in working frequency range, guarantee that electromagnetic wave can not be from non-contacting
It is revealed in the air gap, to realize the inside of waveguide transition connection while not influencing electromagnetic wave along waveguide normal transmission
Non-contactization eliminates the metal contact nonlinear of conventional waveguide flanged joint, realizes low passive intermodulation performance.
(3) present invention have no need to change conventional waveguide flange arrangement can be realized low passive intermodulation transition connection, have compared with
Good versatility；The present invention has the wide working characteristics of all-wave conduction band, and corresponding waveguide work bandwidth can be completely covered, can apply
In various high-power low-intermodulation microwave components and test macro, and reduce to conventional waveguide flange surface treatment process and dress
Requirement with technique.
Detailed description of the invention
Fig. 1 is low passive intermodulation waveguide flange conversion device structure scale diagrams (top view) of the invention；
Fig. 2 is low passive intermodulation waveguide flange conversion device structure scale diagrams (side view) of the invention；
Fig. 3 be low passive intermodulation waveguide flange conversion equipment of the invention in, front and back sides periodicity metal convex body array
Single metal convex body Simulation Calculation schematic diagram；
Fig. 4 is low passive intermodulation waveguide flange conversion equipment of the invention to match Ku frequency range BJ120 (WR75) standard
For waveguide flange in implementation process, the dispersion characteristics simulation curve figure of front and back sides cube periodicity metal convex body array；
Fig. 5 is the conversion equipment for designing matching Ku frequency range BJ120 (WR75) standard waveguide flange of realization according to the present invention
Actual measurement standing wave and insertion loss performance map；
Fig. 6 is the conversion equipment for designing matching Ku frequency range BJ120 (WR75) standard waveguide flange of realization according to the present invention
Actual measurement passive intermodulation result figure.
Specific embodiment
A specific embodiment of the invention is further described in detail with reference to the accompanying drawing:
Basic ideas of the invention are as follows: a kind of low passive intermodulation waveguide flange conversion equipment is proposed, by constructing two-sided week
Phase property metal unit array, in conjunction with mechanical support structure, being formed between common waveguide flange face has two-sided the air gap
Non-contact transition connection.Structure type, size and the air gap size that periodical metal unit is determined by particular step, are obtained
Suitable electromagnetic forbidden band characteristic is obtained, realizes the constraint to electromagnetic wave in working frequency range, guarantees that electromagnetic wave can not be from non-contacting sky
Gas is revealed in gap, to realize that the inside of waveguide transition connection is non-while not influencing electromagnetic wave along waveguide normal transmission
Contactization substantially eliminates the metal contact nonlinear of conventional waveguide flanged joint, realizes low passive intermodulation performance.Institute of the present invention
Conversion equipment is mentioned without changing conventional waveguide flange arrangement, low passive intermodulation transition and conversion can be realized, have preferable general
Property.The mentioned device of the present invention has wideband operation characteristic simultaneously, and corresponding waveguide work bandwidth can be completely covered, can be applied to
In various high-power low-intermodulation microwave components and test macro.
As shown in Figure 1 and Figure 2, a kind of low passive intermodulation waveguide flange conversion equipment, including support plate 1, periodical metal
Convex body array 2 and mechanical support structure 3；
Periodical metal convex body array 2 by several metal convex bodys according to be centainly ordered in support plate 1 positive and negative two
Face is constituted.
Metal convex body structure form in periodical metal convex body array 2 is unlimited, can be cube, cylindrical body, pros
The multiple rules structure such as body.Metal convex body height and structure type are consistent in same plane.Mechanical support structure 3 is set to
The surrounding of plate 1 is supported, and is not overlapped with periodical metal convex body array 2.
It supports and reserves waveguide transmission mouth and screw fixed hole, positions and dimensions and phase on plate 1 and mechanical support structure 3
The standard waveguide flange face answered is identical.
The structure type of mechanical support structure 3 is unlimited, may be designed as totally-enclosed, semiclosed or Open architecture.Machinery branch
The positive and negative surface of support structure 3 is respectively higher than the surface of respective cycle metal convex body array 2, to the mistake between common waveguide flange
Two-sided the air gap is formed when crossing.
Size, the spacing of each metal convex body, surface and the phase of mechanical support structure 3 in periodical metal convex body array 2
It answers the major parameters such as the surface height difference of periodical metal convex body array 2 there is no unique value, obtains suitable ruler by following steps
Very little value:
(1) simulation model of single metal convex body in periodical metal convex body array 2 is established in Electromagnetic Simulation program, if
Dimensional parameters initial value is set, wherein the front and back sides of mechanical support structure 3 and the difference in height on corresponding periodical metal convex body surface are small
In the corresponding quarter-wave of working frequency.Periodic boundary condition is set, intrinsic Solution model is set；
(2) it is solved by characteristic value and obtains dispersion characteristic curve, parameters value is adjusted, so that in dispersion characteristic curve
Frequency forbidden band is fallen within the scope of required working band；
(3) according to the parameters value of acquisition, transformational structure of the present invention and common waveguide are established in Electromagnetic Simulation program
Whole simulation model after flanged joint；
(4) transimission power is set, selects metal in front and back sides periodicity metal convex body array convex according to transimission power size
The quantity of body, to guarantee enough electromagnetic transmission rejections；
(5) emulation obtains Insertion Loss and standing wave as a result, inching parameter, obtains the Insertion Loss and stationary wave characteristic of satisfaction.
To match Ku frequency range BJ120 (WR75) standard waveguide flange (9.84~15GHz of bandwidth of operation), front and back sides cube
For the conversion equipment of periodical metal convex body array, illustrate specific implementation process of the invention:
(1) simulation model of single metal convex body in periodical metal convex body array 2 is established in Electromagnetic Simulation program, such as
Shown in Fig. 3, the height of each metal convex body is h in periodical metal convex body array 2p, width w, with a thickness of t；Adjacent metal
The horizontal spacing of convex body is g1, longitudinal pitch g2；The front and back sides of mechanical support structure and corresponding periodical metal convex body surface
Difference in height be ha.Periodic boundary condition is set, intrinsic Solution model is set, solves dispersion characteristics.
(2) dimensional parameters are adjusted, suitable dispersion characteristics figure is obtained.Work as hp=3.5mm；ha=0.1mm；W=t=
2.3mm；g1=g2When=2.1mm, dispersion characteristics are as shown in figure 4, working frequency range model needed for electromagnetic forbidden band covering BJ120 waveguide
It encloses, meets the requirements.
(3) the whole emulation that standard BJ120 waveguide is connected with transformational structure of the present invention is established according to the dimensional parameters of acquisition
Model selects 3 row's periodicity metal convex body of the face E direction, 2 row's periodicity metal convex body of the face H direction.
(4) setting port power is 100W, and simulated electric field distribution character it is estimated that, is passed through according to electric-field intensity distribution
After crossing two rows of periodical metal convex body structures, the air gap internal electric field is decayed two orders of magnitude, and power attenuation about 40dB or so is past
Pad value is returned up to 80dB or so.Passive intermodulation effect will not be theoretically generated, therefore the selection of convex body element number is suitable.
(5) emulation obtain S parameter, obtain the S parameter characteristic of satisfaction, it is desirable that in entire waveguide work bandwidth, standing wave and
Insertion loss performance is able to satisfy engineering application requirement.
(6) processing is in kind, tests its standing wave and insertion loss performance, as shown in Figure 5.
In the microwave component and test macro required present invention can apply to various high-power low passive intermodulations, without changing
Original waveguide flange structure can be realized low passive intermodulation transition under conditions of not influencing electromagnetic transmission performance and connect
It connects, and there is stable low passive intermodulation performance and very wide bandwidth of operation, have in microwave high power technology field very wide
General application value.
The mentioned method of the present invention realizes the conversion equipment of matching Ku frequency range BJ120 (WR75) standard waveguide flange by design
Realize verifying.3 ranks have been carried out to the low passive intermodulation waveguide flange conversion equipment realized according to the present invention and 5 ranks are reflective
Passive cross modulation test experiment, tests 3 ranks, and carrier frequency is 11.4GHz and 12.75GHz, and passive intermodulation frequency is
14.1GHz.5 ranks are tested, carrier frequency is 12GHz and 12.75GHz, and passive intermodulation frequency is 14.25GHz.It carries out different
PIM test under measured power, 5~100W of single-path testing carrier power.The measurement result of practical passive intermodulation as shown in fig. 6,
After increasing transformational structure of the present invention between common waveguide flange, passive intermodulation level is greatly reduced, and 3 rank passive intermodulations, which are lower than, is
The remaining intermodulation level of system, 5 rank passive intermodulations reach the average degree of suppression of passive intermodulation close to system residual intermodulation level
25dB or more, maximum inhibition degree are more than 50dB.Test result shows the mentioned low passive intermodulation waveguide flange conversion equipment of the present invention
The low passive intermodulation transition connection between conventional waveguide flange can be effectively realized.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (7)
1. a kind of low passive intermodulation waveguide flange conversion equipment, it is characterised in that: convex including support plate (1), periodical metal
Volume array (2) and mechanical support structure (3)；The periodicity metal convex body array (2) is by several metal convex bodys according to setting
It is ordered in the tow sides of support plate (1)；Mechanical support structure (3) setting is supporting the four of plate (1) tow sides
Circumferential edges, the surface of mechanical support structure (3) are respectively higher than the surface of respective cycle metal convex body array (2).
2. a kind of low passive intermodulation waveguide flange conversion equipment according to claim 1, which is characterized in that the periodicity
Metal convex body in metal convex body array (2) is any regular shape, the height and knot of the metal convex body being in the same plane
Configuration formula is consistent.
3. a kind of low passive intermodulation waveguide flange conversion equipment according to claim 1 or 2, it is characterised in that: the machine
Tool support construction (3) is not overlapped with periodical metal convex body array (2).
4. a kind of low passive intermodulation waveguide flange conversion equipment according to claim 3, it is characterised in that: the support is flat
Reserve waveguide transmission mouth and screw fixed hole on plate (1) and mechanical support structure (3), positions and dimensions and corresponding standard wave
It is identical to lead flange face.
5. a kind of low passive intermodulation waveguide flange conversion equipment according to claim 4, it is characterised in that: the mechanical branch
The structure type of support structure (3) is totally-enclosed, semiclosed or Open architecture.
6. a kind of low passive intermodulation waveguide flange conversion equipment according to claim 4 or 5, it is characterised in that: the week
The size of each metal convex body, the spacing of adjacent two metals convex body, the mechanical support structure in phase property metal convex body array (2)
(3) surface and the preparation method of the difference in height on respective cycle metal convex body array (2) surface are as follows:
Step 1: establishing the simulation model of single metal convex body in periodical metal convex body array (2) in Electromagnetic Simulation program,
Dimensional parameters initial value is set, and dimensional parameters include the size of each metal convex body, spacing, the mechanical support of adjacent two metals convex body
The difference in height on structure (3) surface and respective cycle metal convex body array (2) surface；Periodic boundary condition is set, and setting is originally
Levy Solution model；
Step 2: it is solved by characteristic value and obtains dispersion characteristic curve, each size parameter values are adjusted, so that dispersion characteristic curve
In frequency forbidden band fall within the scope of required working band；
Step 3: according to each size parameter values of acquisition, the low passive intermodulation waveguide method is established in Electromagnetic Simulation program
Blue conversion equipment connect with waveguide flange after whole simulation model；
Step 4: setting transimission power, simulated electric field distribution character, according to transimission power size selection cycle metal convex body battle array
Arrange the quantity of metal convex body in (2)；
Step 5: emulation obtains Insertion Loss and standing wave as a result, each dimensional parameters are adjusted, so that staying in entire waveguide work bandwidth
Wave and insertion loss performance are all satisfied requirement.
7. a kind of low passive intermodulation waveguide flange conversion equipment according to claim 6, it is characterised in that: the step 1
In, the surface of mechanical support structure (3) is less than working frequency with the difference in height on corresponding periodical metal convex body array (2) surface
Corresponding quarter-wave.
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| CN201910329798.7A CN110137633A (en) | 2019-04-23 | 2019-04-23 | A kind of low passive intermodulation waveguide flange conversion equipment |
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| CN201910329798.7A CN110137633A (en) | 2019-04-23 | 2019-04-23 | A kind of low passive intermodulation waveguide flange conversion equipment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934063A (en) * | 2020-06-29 | 2020-11-13 | 西安电子科技大学 | Non-contact ultra-wideband waveguide rotary joint, control system, method and application |
| CN111934061A (en) * | 2020-06-29 | 2020-11-13 | 西安电子科技大学 | Ultra-wideband waveguide rotary joint, control system, method and application |
| CN111954453A (en) * | 2020-06-29 | 2020-11-17 | 西安电子科技大学 | Non-contact rotatable broadband electromagnetic shielding structure, design method and application |
| CN111954452A (en) * | 2020-06-29 | 2020-11-17 | 西安电子科技大学 | Wear-resistant rotatable broadband electromagnetic shielding structure, design method and application |
| CN111988974A (en) * | 2020-07-10 | 2020-11-24 | 西安电子科技大学 | Grooved non-contact electromagnetic shielding structure, design method and application |
| CN112530910A (en) * | 2020-11-18 | 2021-03-19 | 北京理工大学 | Metal waveguide device for three-dimensional packaging of chip and design method thereof |
| CN113725567A (en) * | 2021-08-30 | 2021-11-30 | 胡南 | Waveguide with radio frequency choke |
| CN114069181A (en) * | 2021-10-09 | 2022-02-18 | 西安电子科技大学 | Miniaturized non-contact waveguide transmission line and application |
| CN114069172A (en) * | 2021-10-09 | 2022-02-18 | 西安电子科技大学 | Miniaturized non-contact low-passive intermodulation waveguide filter, design method and application |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934063A (en) * | 2020-06-29 | 2020-11-13 | 西安电子科技大学 | Non-contact ultra-wideband waveguide rotary joint, control system, method and application |
| CN111934061A (en) * | 2020-06-29 | 2020-11-13 | 西安电子科技大学 | Ultra-wideband waveguide rotary joint, control system, method and application |
| CN111954453A (en) * | 2020-06-29 | 2020-11-17 | 西安电子科技大学 | Non-contact rotatable broadband electromagnetic shielding structure, design method and application |
| CN111954452A (en) * | 2020-06-29 | 2020-11-17 | 西安电子科技大学 | Wear-resistant rotatable broadband electromagnetic shielding structure, design method and application |
| CN111934061B (en) * | 2020-06-29 | 2023-02-03 | 西安电子科技大学 | Ultra-wideband waveguide rotary joint, control system, method and application |
| CN111934063B (en) * | 2020-06-29 | 2023-01-17 | 西安电子科技大学 | Non-contact ultra-wideband waveguide rotary joint, control system, method and application |
| CN111954452B (en) * | 2020-06-29 | 2022-11-29 | 西安电子科技大学 | Wear-resistant rotatable broadband electromagnetic shielding structure, design method and application |
| CN111954453B (en) * | 2020-06-29 | 2022-11-29 | 西安电子科技大学 | Non-contact rotatable broadband electromagnetic shielding structure, design method and application |
| CN111988974A (en) * | 2020-07-10 | 2020-11-24 | 西安电子科技大学 | Grooved non-contact electromagnetic shielding structure, design method and application |
| CN112530910B (en) * | 2020-11-18 | 2022-09-02 | 北京理工大学 | Metal waveguide device for three-dimensional packaging of chip and design method thereof |
| CN112530910A (en) * | 2020-11-18 | 2021-03-19 | 北京理工大学 | Metal waveguide device for three-dimensional packaging of chip and design method thereof |
| CN113725567A (en) * | 2021-08-30 | 2021-11-30 | 胡南 | Waveguide with radio frequency choke |
| CN114069172A (en) * | 2021-10-09 | 2022-02-18 | 西安电子科技大学 | Miniaturized non-contact low-passive intermodulation waveguide filter, design method and application |
| CN114069181A (en) * | 2021-10-09 | 2022-02-18 | 西安电子科技大学 | Miniaturized non-contact waveguide transmission line and application |
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Application publication date: 20190816 |