CN105206899A - X-band TM01-TE11 mode converter - Google Patents
X-band TM01-TE11 mode converter Download PDFInfo
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- CN105206899A CN105206899A CN201510523109.8A CN201510523109A CN105206899A CN 105206899 A CN105206899 A CN 105206899A CN 201510523109 A CN201510523109 A CN 201510523109A CN 105206899 A CN105206899 A CN 105206899A
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Abstract
The invention discloses an X-band TM01-TE11 mode converter comprising an external circular waveguide tube and an internal circular waveguide tube which are in the vacuum state. The internal circular waveguide tube is arranged at the internal side of the external circular waveguide tube, and the axes of the internal circular waveguide tube and the external circular waveguide tube are overlapped. The external circular waveguide tube comprises three segments, including an input segment, a conical segment and a conversion segment respectively. The diameter of the input segment is greater than that of the conversion segment. The internal diameter of the input segment is 50mm, and the internal diameter of the conversion segment is 40mm. The internal circular waveguide tube is arranged at the conversion segment. At least four metal separating plates are evenly distributed between the external wall of the internal circular waveguide tube and the internal wall of the conversion segment. The part between the external wall of the internal circular waveguide tube and the internal wall of the external circular waveguide tube is divided into four areas by the four metal separating plates, wherein a part in the two adjacent areas is filled with teflon dielectric. Efficiency of the center frequency of electromagnetic wave through conversion of the X-band TM01-TE11 mode converter is 95.3%, bandwidth of more than 90% is 3.2%, and the maximum power is 18.6GW so that transmission efficiency and loading power are enhanced.
Description
Technical field
The present invention relates to electromagnetic wave conversion apparatus technical field, particularly relate to a kind of X-band TM01-TE11 mode converter.
Background technology
Far-field pattern due to TM01 pattern output port is annular, be unfavorable for transmission and the directional transmissions of electromagnetic field, need to be transformed into the linear polarization patterns such as TE11 or EH11, such as: the TM01 ripple of 9.7GHz exports from the circular waveguide of radius 25mm, HE11 pattern is changed into through feed system, be transferred on reflector antenna through beam waveguide again, launched by reflector antenna.
Waveguide is used to the electromagnetic structure of directional guide.Common waveguiding structure mainly contains parallel double conducting wire, coaxial line, parallel flat waveguide, rectangular waveguide, circular waveguide, microstrip line, slab dielectric optical waveguide and optical fiber.
Usually, waveguide specially refers to hollow metal waveguide and the surface wave guide of various shape, and the electromagnetic wave be transmitted is limited in metal tube by completely, also known as closed waveguide; The electromagnetic wave of guiding constrains in around waveguiding structure, also known as open waveguide by the latter.When radio wave frequency brings up to centimeter wave wave band and the millimeter wave band of 3000 megahertz to 300 gigahertz (GHZ)s, the use of coaxial line is restricted and adopts metallic waveguide or other guide wave devices.The advantage of waveguide is that conductor losses and dielectric loss are little; Power capacity is large; There is no radiation loss; Structure is simple, is easy to manufacture.Electromagnetic field in waveguide can by the Boundary Condition for Solving of maxwell equation group in conjunction with waveguide, different from normal transmission line, can not transmit TEM mould in waveguide, there is serious dispersion phenomenon in electromagnetic wave in the air, and dispersion phenomenon illustrates that electromagnetic wave propagation speed is relevant with frequency.
A kind of possible field distribution meeting waveguide cross-section boundary condition is called the pattern of waveguide, and different patterns has different field structures, and they all meet the boundary condition of waveguide cross-section, can independently exist, and the field structure in waveguide can be divided into two large classes:
TE mould: electric field does not have longitudinal component;
TM mould: magnetic field does not have longitudinal component;
In order to complete the conversion of TM01 mould to TE mould, existing circular waveguide spacer-type mode converter adds lastblock sheet metal in the centre of circular waveguide, then loaded medium or thickening metallic walls in lower half waveguide, make the TE11 wave propagation constant in lower half circle waveguide different, select metallic walls or medium length to make power-on and power-off magnetic phase differ half period, thus reach the object of mode conversion.
HFSS emulation is carried out according to existing circular waveguide spacer-type mode converter, simulation model radius 25mm, intermetallic metal septa thickness is 1mm, metal layer thickness is 10mm below, half circular waveguide is the same with the phase constant computational methods of each pattern in circular waveguide, obtains result, above in half circular waveguide TE11 phase constant be 189.3, lower half circle waveguide TE11 phase constant is 161.9, and upper and lower phase difference is 180 degree of length needed is 114mm.
Emulate with HFSS, input port input TM01 ripple, found that conversion efficiency is very low, general 50%, after all parameters are optimized or the same very low, the highest can only to 60%.Observe S parameter, find that input port reflects back other higher modes of the TM01 and 30% of general 15%, the TE11 purity of 2 port outgoing, also lower than 90%, is obviously that higher mode is not inhibited, affects conversion efficiency.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of X-band TM01-TE11 mode converter, outer circular waveguide tube is divided into input section, conical section and transforming section, interior circular waveguide tube is set inside transforming section, conical section makes waveguide radius reduce thus effectively suppresses the propagation of higher mode, greatly improves efficiency of transmission and load power.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of X-band TM01-TE11 mode converter, comprise the outer circular waveguide tube in vacuum state and interior circular waveguide tube, interior circular waveguide tube is positioned at inside outer circular waveguide tube, and both deads in line, outer circular waveguide tube comprises three sections, be respectively input section, conical section and transforming section, described input section diameter is greater than transforming section diameter, the interior diameter of input section is 50mm, the interior diameter of transforming section is 40mm, described interior circular waveguide tube is positioned at transforming section, at least four pieces of metal partion (metp)s are evenly equipped with between described interior circular waveguide tube outer wall and transforming section inwall, four pieces of metal partion (metp)s are divided into four regions by between interior circular waveguide tube outer wall and outer circular waveguide tube inwall, wherein fill dielectric in adjacent two regions.
The wall thickness of described interior circular waveguide tube is 1mm, and internal diameter is 29.6mm.
Described metal partion (metp) length is 160.5mm, and inner circle waveguide length is 213.9mm, and the filling length of dielectric is 33.4mm.
Described dielectric is polytetrafluoroethylene.
Described metal partion (metp) is copper coin or aluminium sheet.
The beneficial effect adopting technique scheme to produce is: by outer circular waveguide tube being divided into input section, conical section and transforming section, interior circular waveguide tube is set inside transforming section, conical section makes waveguide radius reduce thus effectively suppresses the propagation of higher mode, in the electromagnetic wave centre frequency of conversion, efficiency is 95.3%, more than 90% bandwidth is 3.2%, the disruptive field intensity of PTFE medium is 60MW/M, maximum field strength in medium is 0.44KV/M, maximum power is 18.6GW, greatly improves efficiency of transmission and load power.
Accompanying drawing explanation
Fig. 1 is transformer configuration schematic diagram of the present invention;
Fig. 2 is the end face structure schematic diagram of converter;
Wherein: 1, outer circular waveguide tube; 2, transforming section; 3, metal partion (metp); 4, interior circular waveguide tube.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.
As shown in Figure 1-2, the invention discloses a kind of X-band TM01-TE11 mode converter, comprise the outer circular waveguide tube 1 in vacuum state and interior circular waveguide tube 4, interior circular waveguide tube 4 is positioned at inside outer circular waveguide tube 1, and both deads in line, the left end of interior circular waveguide follows the left end of outer circular waveguide at a distance of 100mm, outer circular waveguide tube 1 comprises three sections, be respectively input section, conical section and transforming section 2, described input section diameter is greater than transforming section 2 diameter, the interior diameter of input section is 50mm, the interior diameter of transforming section 2 is 40mm, the length of conical section is 30mm, described interior circular waveguide tube 4 is positioned at transforming section 2, at least four pieces of metal partion (metp)s 3 are evenly equipped with between described interior circular waveguide tube 4 outer wall and transforming section 2 inwall, four pieces of metal partion (metp)s 3 are divided into four regions by between interior circular waveguide tube 4 outer wall and outer circular waveguide tube 1 inwall, the length of four pieces of metal partion (metp)s is 160.5mm, thickness is 1mm, width is 4.2mm, its left end is with the left end 153.4mm apart of outer circular waveguide, wherein fill the dielectric of 33.4mm length in adjacent two regions, dielectric preferably polytetrafluoroethylene, the right-hand justified of the metallic plate inside PTFE medium right-hand member and interior circular waveguide, its left end is with the left end 234.5mm apart of outer circular waveguide, the wall thickness of described interior circular waveguide tube 4 is 1mm, interior diameter is 29.6mm, the length of interior circular waveguide tube 4 is 213.9mm, and the length of described outer circular waveguide tube 1 is 380mm, and the metal partion (metp) length in interior circular waveguide tube is 114.5mm, width is 29.6mm, thickness is 1mm, overlaps with interior circular waveguide shaft heart line, and its left end is with the left end 153.4mm apart of outer circular waveguide.
The present invention is through experimental verification, by outer circular waveguide tube being divided into input section, conical section and transforming section, interior circular waveguide tube is set inside transforming section, conical section makes waveguide radius reduce thus effectively suppresses the propagation of higher mode, and in the electromagnetic wave centre frequency of conversion, efficiency is 95.3%, more than 90% bandwidth is 3.2%, the disruptive field intensity of PTFE medium is 60MW/M, maximum field strength in medium is 0.44KV/M, and maximum power is 18.6GW, greatly improves efficiency of transmission and load power.
Claims (5)
1. an X-band TM01-TE11 mode converter, it is characterized in that: comprise the outer circular waveguide tube (1) in vacuum state and interior circular waveguide tube (4), interior circular waveguide tube (4) is positioned at outer circular waveguide tube (1) inner side, and both deads in line, outer circular waveguide tube (1) comprises three sections, be respectively input section, conical section and transforming section (2), described input section diameter is greater than transforming section (2) diameter, the interior diameter of input section is 50mm, the interior diameter of transforming section (2) is 40mm, described interior circular waveguide tube (4) is positioned at transforming section (2), at least four pieces of metal partion (metp)s (3) are evenly equipped with between described interior circular waveguide tube (4) outer wall and transforming section (2) inwall, four pieces of metal partion (metp)s (3) are divided into four regions by between interior circular waveguide tube (4) outer wall and outer circular waveguide tube (1) inwall, wherein fill dielectric in adjacent two regions.
2. X-band TM01-TE11 mode converter according to claim 1, is characterized in that: the wall thickness of described interior circular waveguide tube (4) is 1mm, and internal diameter is 29.6mm.
3. X-band TM01-TE11 mode converter according to claim 1, it is characterized in that: described metal partion (metp) (3) length is 160.5mm, inner circle waveguide length is 213.9mm, and the filling length of dielectric is 33.4mm.
4. the X-band TM01-TE11 mode converter according to Claims 2 or 3, is characterized in that: described dielectric is polytetrafluoroethylene.
5. X-band TM01-TE11 mode converter according to claim 4, is characterized in that: described metal partion (metp) (3) is 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 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510523109.8A CN105206899B (en) | 2015-08-24 | 2015-08-24 | X-band TM01 TE11 mode converters |
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| Publication Number | Publication Date |
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| CN105206899A true CN105206899A (en) | 2015-12-30 |
| CN105206899B CN105206899B (en) | 2018-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510523109.8A Expired - Fee Related CN105206899B (en) | 2015-08-24 | 2015-08-24 | X-band TM01 TE11 mode converters |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846016A (en) * | 2016-04-14 | 2016-08-10 | 中国工程物理研究院应用电子学研究所 | High power microwave TE31-TE11 mode converter |
| CN107591592A (en) * | 2017-08-28 | 2018-01-16 | 电子科技大学 | Rectangular waveguide TE10 moulds are to circular waveguide TE21 Mould Breadth band model converters |
| CN107863593A (en) * | 2017-09-26 | 2018-03-30 | 西北核技术研究所 | Suppress TE11The circular waveguide wave mode suppressor and its design method of modes microwave |
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 |
|---|
| 唐世荣: ""同轴式圆波导TM01-TE11模式变换器的研究"", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846016A (en) * | 2016-04-14 | 2016-08-10 | 中国工程物理研究院应用电子学研究所 | High power microwave TE31-TE11 mode converter |
| 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 |
| CN107591592A (en) * | 2017-08-28 | 2018-01-16 | 电子科技大学 | Rectangular waveguide TE10 moulds are to circular waveguide TE21 Mould Breadth band model converters |
| 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 |
| CN107863593A (en) * | 2017-09-26 | 2018-03-30 | 西北核技术研究所 | Suppress TE11The circular waveguide wave mode suppressor and its design method of modes microwave |
| 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 |
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| CN105206899B (en) | 2018-02-09 |
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