CN105206899B - X-band TM01 TE11 mode converters - Google Patents
X-band TM01 TE11 mode converters Download PDFInfo
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- CN105206899B CN105206899B CN201510523109.8A CN201510523109A CN105206899B CN 105206899 B CN105206899 B CN 105206899B CN 201510523109 A CN201510523109 A CN 201510523109A CN 105206899 B CN105206899 B CN 105206899B
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Abstract
The invention discloses a kind of X-band TM01 TE11 mode converters, including the outer circular waveguide tube in vacuum state and interior circular waveguide tube, interior circular waveguide tube is located on the inside of outer circular waveguide tube, and both axis overlap, outer circular waveguide tube includes three sections, respectively input section, conical section and transforming section, the input section diameter is more than transforming section diameter, the internal diameter of input section is 50mm, the interior diameter of transforming section is 40mm, the interior circular waveguide tube is located at transforming section, at least four pieces of metal partion (metp)s are evenly equipped between the interior circular waveguide tube outer wall and transforming section inwall, four pieces of metal partion (metp)s will be divided into four regions between interior circular waveguide tube outer wall and outer circular waveguide tube inwall, a part of filled polytetrafluoroethylene medium in wherein two neighboring region；Efficiency is 95.3% in the electromagnetic wave centre frequency converted by the present invention, and 90% band above is 3.2%, peak power 18.6GW, improves efficiency of transmission and load power.
Description
Technical field
The present invention relates to electromagnetic wave conversion apparatus technical field, more particularly to a kind of X-band TM01-TE11 mode conversions
Device.
Background technology
Because the far-field pattern of TM01 pattern output ports is annular, it is unfavorable for transmission and the directional transmissions of electromagnetic field,
Need to be transformed into the linear polarization pattern such as TE11 or EH11, such as：9.7GHz TM01 ripples export from radius 25mm circular waveguide,
HE11 patterns are changed into by feed system, then are transferred to by beam waveguide on reflector antenna, are launched by reflector antenna
Go out.
Waveguide is the structure for directional guide electromagnetic wave.Common waveguiding structure mainly have parallel double conducting wire, coaxial line,
Parallel flat waveguide, rectangular waveguide, circular waveguide, microstrip line, slab dielectric optical waveguide and optical fiber.
Generally, waveguide refers exclusively to variously-shaped hollow metal waveguide and surface wave guide, the electromagnetism that the former will be transmitted
Ripple is entirely limited in metal tube, also known as closes waveguide；The latter constrains in the electromagnetic wave of guiding around waveguiding structure, also known as
Open waveguide.When radio wave frequency brings up to 3000 megahertzs of centimeter wave wave bands and millimeter wave band to 300 gigahertz (GHZ)s, coaxial line
Use be restricted and use metallic waveguide or other guide wave devices.The advantages of waveguide is conductor losses and dielectric loss
It is small；Power capacity is big；There is no radiation loss；It is simple in construction, it is easily fabricated.Electromagnetic field in waveguide can be by Maxwell equation
Group combines the Boundary Condition for Solving of waveguide, different from normal transmission line, TEM moulds can not be transmitted in waveguide, electromagnetic wave is being propagated
It is middle in the presence of serious dispersion phenomenon, dispersion phenomenon illustrates that electromagnetic wave propagation speed is relevant with frequency.
Meet that a kind of possible field distribution of waveguide cross-section boundary condition is referred to as the pattern of waveguide, different patterns has not
Same field structure, they all meet the boundary condition of waveguide cross-section, can be individually present, and the field structure in waveguide can be divided into
Two major classes：
TE moulds：Electric field does not have longitudinal component；
TM moulds：Magnetic field does not have longitudinal component；
In order to complete conversion of the TM01 moulds to TE moulds, existing circular waveguide spacer-type mode converter is in circular waveguide
Between plus lastblock sheet metal, then loaded medium or thicken metallic walls in lower half of waveguide, allow in lower half circle waveguide
The propagation constant of TE11 ripples is different, selects metallic walls or medium length to cause electromagnetic field phase difference half period up and down, from
And reach the purpose of mode conversion.
HFSS emulation, simulation model radius 25mm, intermetallic metal are carried out according to existing circular waveguide spacer-type mode converter
Septa thickness is 1mm, below metal layer thickness be 10mm, the phase constant of each pattern in half circular waveguide and circular waveguide calculates
Method is the same, obtains result, above in half circular waveguide TE11 phase constants be 189.3, lower half circular waveguide TE11 phase constants are
161.9, upper and lower phase difference is that the length that 180 degree needs is 114mm.
Emulated with HFSS, input port input TM01 ripples, as a result find that conversion efficiency is very low, general 50%, to institute
There is parameter to optimize rear or the same very low, only up to be to 60%.S parameter is observed, finds input port reflection
Go back general 15% TM01 and 30% other higher modes, 2 ports outgoing TE11 purity also below 90%, hence it is evident that be high order
Mould is not inhibited, and influences conversion efficiency.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of X-band TM01-TE11 mode converters, by outer circular waveguide
Pipe is divided into input section, conical section and transforming section, set on the inside of the transforming section in circular waveguide tube, conical section make waveguide radius reduce from
And effectively suppress the propagation of higher mode, greatly improve efficiency of transmission and load power.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of X-band TM01-TE11 patterns become
Parallel operation, including the outer circular waveguide tube in vacuum state and interior circular waveguide tube, interior circular waveguide tube are located at outer circular waveguide tube inner side and two
Person's axis overlaps, and outer circular waveguide tube includes three sections, and respectively input section, conical section and transforming section, the input section diameter is more than
Transforming section diameter, the interior diameter of input section is 50mm, and the interior diameter of transforming section is 40mm, and the interior circular waveguide tube is positioned at conversion
Section, at least four pieces of metal partion (metp)s are evenly equipped between the interior circular waveguide tube outer wall and transforming section inwall, four pieces of metal partion (metp)s are by
Four regions are divided between circular waveguide tube outer wall and outer circular waveguide tube inwall, wherein filling insulation is situated between in two neighboring region
Matter.
The wall thickness of the interior circular waveguide tube is 1mm, internal diameter 29.6mm.
The metal partion (metp) length is 160.5mm, and inner circle waveguide length is 213.9mm, and the filling length of dielectric is
33.4mm。
The dielectric is polytetrafluoroethylene (PTFE).
The metal partion (metp) is copper coin or aluminium sheet.
It is using beneficial effect caused by above-mentioned technical proposal：By the way that outer circular waveguide tube is divided into input section, taper
Section and transforming section, set on the inside of the transforming section in circular waveguide tube, conical section makes waveguide radius reduce so as to effectively suppress higher mode
Propagation, efficiency is 95.3% in the electromagnetic wave centre frequency by conversion, and 90% band above is 3.2%, polytetrafluoroethylene (PTFE)
The disruptive field intensity of medium is 60MW/M, and the maximum field strength in medium is 0.44KV/M, peak power 18.6GW, greatly improves biography
Defeated efficiency and load power.
Brief description of the drawings
Fig. 1 is the transformer configuration schematic diagram of the present invention；
Fig. 2 is the end structure illustration of converter；
Wherein：1st, outer circular waveguide tube；2nd, transforming section；3rd, metal partion (metp)；4th, interior circular waveguide tube.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still the present invention can be with
It is different from other manner described here using other to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
As shown in Figure 1-2, the invention discloses a kind of X-band TM01-TE11 mode converters, including in vacuum state
Outer circular waveguide tube 1 and interior circular waveguide tube 4, interior circular waveguide tube 4 overlap positioned at the outer inner side of circular waveguide tube 1 and both axis, inner circle ripple
The left end led includes three sections with the left end of outer circular waveguide at a distance of 100mm, outer circular waveguide tube 1, respectively input section, conical section and change
Section 2 is changed, the input section diameter is more than the diameter of transforming section 2, and the interior diameter of input section is 50mm, and the interior diameter of transforming section 2 is
40mm, the length of conical section is 30mm, and the interior circular waveguide tube 4 is located at transforming section 2, the interior outer wall of circular waveguide tube 4 and conversion
At least four pieces of metal partion (metp)s 3 are evenly equipped between 2 inwalls of section, and four pieces of metal partion (metp)s 3 are by the interior outer wall of circular waveguide tube 4 and outer circular waveguide tube
It is divided into four regions between 1 inwall, the length of four pieces of metal partion (metp)s is 160.5mm, thickness 1mm, width 4.2mm, its
Left end with outer circular waveguide left end at a distance of 153.4mm, wherein in two neighboring region fill 33.4mm length dielectric, absolutely
Edge medium preferably polytetrafluoroethylene, the right alignment of PTFE medium right-hand member and the metallic plate inside interior circular waveguide, it is left
Holding the left end with outer circular waveguide, the wall thickness of the interior circular waveguide tube 4 is 1mm, interior diameter 29.6mm at a distance of 234.5mm；Inner circle
The length of waveguide 4 is 213.9mm, and the length of the outer circular waveguide tube 1 is 380mm, the metal partion (metp) length in interior circular waveguide tube
Spend for 114.5mm, width 29.6mm, thickness 1mm, overlapped with interior circular waveguide shaft heart line, a left side of its left end with outer circular waveguide
End is at a distance of 153.4mm.
The present invention passes through experimental verification, by the way that outer circular waveguide tube is divided into input section, conical section and transforming section, in transforming section
Circular waveguide tube in the setting of inner side, conical section make waveguide radius reduce so as to effectively suppress the propagation of higher mode, by the electricity of conversion
Efficiency is 95.3% in magnetic wave centre frequency, and 90% band above is 3.2%, and the disruptive field intensity of PTFE medium is
60MW/M, the maximum field strength in medium is 0.44KV/M, peak power 18.6GW, greatly improves efficiency of transmission and carrying work(
Rate.
Claims (4)
- A kind of 1. X-band TM01-TE11 mode converters, it is characterised in that：Including the outer circular waveguide tube (1) in vacuum state and Interior circular waveguide tube (4), interior circular waveguide tube (4) is located on the inside of outer circular waveguide tube (1) and both axis overlap, outer circular waveguide tube (1) Including three sections, respectively input section, conical section and transforming section (2), the input section diameter are more than transforming section (2) diameter, input The interior diameter of section is 50mm, and the interior diameter of transforming section (2) is 40mm, and the interior circular waveguide tube (4) is located at transforming section (2), described At least four pieces of metal partion (metp)s (3), four pieces of metal partion (metp)s (3) are evenly equipped between interior circular waveguide tube (4) outer wall and transforming section (2) inwall Four regions will be divided between interior circular waveguide tube (4) outer wall and outer circular waveguide tube (1) inwall, wherein being filled out in two neighboring region Fill dielectric；The dielectric is polytetrafluoroethylene (PTFE).
- 2. X-band TM01-TE11 mode converters according to claim 1, it is characterised in that：The interior circular waveguide tube (4) wall thickness is 1mm, internal diameter 29.6mm.
- 3. X-band TM01-TE11 mode converters according to claim 1, it is characterised in that：The metal partion (metp) (3) Length is 160.5mm, and inner circle waveguide length is 213.9mm, and the filling length of dielectric is 33.4mm.
- 4. X-band TM01-TE11 mode converters according to claim 1, it is characterised in that：The metal partion (metp) (3) For copper coin or aluminium sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510523109.8A CN105206899B (en) | 2015-08-24 | 2015-08-24 | X-band TM01 TE11 mode converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510523109.8A CN105206899B (en) | 2015-08-24 | 2015-08-24 | X-band TM01 TE11 mode converters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105206899A CN105206899A (en) | 2015-12-30 |
| CN105206899B true CN105206899B (en) | 2018-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510523109.8A Expired - Fee Related CN105206899B (en) | 2015-08-24 | 2015-08-24 | X-band TM01 TE11 mode converters |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846016B (en) * | 2016-04-14 | 2018-10-26 | 中国工程物理研究院应用电子学研究所 | A kind of High-Power Microwave TE31-TE11Mode converter |
| CN107591592B (en) * | 2017-08-28 | 2021-02-05 | 电子科技大学 | Rectangular waveguide TE10 mode-to-circular waveguide TE21 mode broadband mode converter |
| CN107863593B (en) * | 2017-09-26 | 2019-12-06 | 西北核技术研究所 | Circular waveguide mode suppressor for suppressing TE11 mode microwave and design method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5369367A (en) * | 1992-12-02 | 1994-11-29 | Hughes Aircraft Company | Wideband coax-to-TM01 converter and testing system using the same |
-
2015
- 2015-08-24 CN CN201510523109.8A patent/CN105206899B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5369367A (en) * | 1992-12-02 | 1994-11-29 | Hughes Aircraft Company | Wideband coax-to-TM01 converter and testing system using the same |
Non-Patent Citations (1)
| Title |
|---|
| "同轴式圆波导TM01-TE11模式变换器的研究";唐世荣;《中国优秀硕士学位论文全文数据库》;20090415;第2-3、25页 * |
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| Publication number | Publication date |
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| CN105206899A (en) | 2015-12-30 |
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