CN101728601B - Compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide - Google Patents
Compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide Download PDFInfo
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- CN101728601B CN101728601B CN 201010106328 CN201010106328A CN101728601B CN 101728601 B CN101728601 B CN 101728601B CN 201010106328 CN201010106328 CN 201010106328 CN 201010106328 A CN201010106328 A CN 201010106328A CN 101728601 B CN101728601 B CN 101728601B
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- overmoded waveguide
- matrix
- rectangle
- waveguide
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Abstract
The invention discloses a compact multilevel higher harmonic mode multi-mode filter for a rectangular overmoded waveguide and relates to a microwave waveguide element capable of filtering various higher harmonic modes in the rectangular overmoded waveguide in the same frequency while not influencing the pass of a dominant mode basically. Two parallel stampers (2) are arranged in the same cross section of the rectangular overmoded waveguide (1) and positioned on two sides of a narrow wall (3) of an inner cavity respectively; the two stampers (2) form a set of parallel stampers; the height of each stamper (2) in the rectangular overmoded waveguide (1) is equal to that of the narrow wall (3) of the inner cavity of the rectangular overmoded waveguide (1); the width of each stamper (2) is less than a half of that of a wide wall (4) of the inner cavity of the rectangular overmoded waveguide (1); the rectangular overmoded waveguide (1) is provided with two or more sets of the parallel stampers (2); and a resonator cell (5) is formed by two adjacent sets of the parallel stampers (2) and a space of the rectangular overmoded waveguide (1) between the two adjacent sets of the parallel stampers (2).
Description
Technical field
The present invention relates to a kind of microwave waveguide components, especially a kind of mode filter that can filter the multiple higher mode in the rectangle overmoded waveguide simultaneously.
Background technology
Different with in single mode waveguide, have only a transmission mode, other higher mode all is the evanescent mode situation of (or claiming to wither and fall pattern), in overmoded waveguide, two or more transmission mode is arranged usually, at same working frequency range, the size of overmoded waveguide is greater than single mode waveguide.Generally generally use single mode waveguide, but in many occasions, particularly in submillimeter wave or Terahertz frequency range, in order to reduce the loss of waveguide, perhaps be subjected to the restriction of processing technology, need to use overmoded waveguide.In the rectangle overmoded waveguide, the operation wavelength of rectangular waveguide is not only less than the i.e. main mould TE of mode of operation
10Cut-off wavelength, but also less than some higher modes, for example TE
20, TE
11, TM
11The cut-off wavelength of mould or other higher mode, therefore in the rectangle overmoded waveguide, not only main mould can transmit, some higher modes such as TE
20, TE
11, TM
11Or other higher mode also can transmit, and the higher mode of these transmission can influence the transmission of main mould, causes the decline of main mould transmission performance, therefore need not influence under the condition that main mould transmits as far as possible, suppresses or filters these higher modes.The filtering higher mode is very difficult in the rectangle overmoded waveguide, and usual way is at the wave guide wall fluting or cracks that still slotting or crack usually can only a kind of higher mode of filtering.
Summary of the invention
Technical problem: the objective of the invention is to propose a kind of compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide, this mode filter is a plurality of higher modes in the overmoded waveguide of filtering rectangle effectively, and is very little to the transmission influence of rectangular waveguide master mould simultaneously.
Technical scheme: compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide of the present invention comprises rectangle overmoded waveguide and matrix; Wherein: matrix is positioned at the inside of rectangle overmoded waveguide, the transverse cross-section parallel of itself and rectangle overmoded waveguide; Matrix is thin conductor piece, and it is shaped as rectangle; In the same cross section of rectangle overmoded waveguide, two parallel matrixs are arranged; In these two matrixs, matrix is against a narrow wall of inner chamber of rectangle overmoded waveguide, and another piece matrix is then against the narrow wall of another one inner chamber of rectangle overmoded waveguide; Two matrixs like this constitute one group of parallel matrix; The height of matrix in the rectangle overmoded waveguide equals the height of the narrow wall of rectangle overmoded waveguide inner chamber; The width of matrix is less than half of the wide wall width of rectangle overmoded waveguide inner chamber; The parallel matrix that two groups or more is arranged in rectangle overmoded waveguide; The parallel matrix of two adjacent groups and the rectangle overmoded waveguide space between the parallel matrix of two adjacent groups constitutes a resonant element.The cross sectional dimensions of rectangle overmoded waveguide is greater than the cross sectional dimensions of the rectangle single mode waveguide under the same operating frequency situation, make that in the rectangle overmoded waveguide not only main mould satisfies transmission conditions, and have one or more higher mode also to satisfy transmission conditions and can not be cut off.
On operating frequency, the main mould of rectangle overmoded waveguide is at resonant element resonance, and the higher mode of rectangle overmoded waveguide is at resonant element resonance not.
Distance in the resonant element between the parallel matrix of two adjacent groups be in from less than the guide wavelength of rectangle overmoded waveguide master mould to the scope two to three times of the rectangle overmoded waveguide master mould guide wavelengths.The shape and size of all parallel matrixs are all identical.
As long as on operating frequency, the size of rectangle overmoded waveguide, the width of matrix, the thickness of matrix, and the distance between two groups of parallel matrixs satisfies the condition of resonance of main mould, then make on operating frequency, main mould resonance in resonant element of rectangle overmoded waveguide, higher mode in the rectangle overmoded waveguide is then in the resonant element off resonance, the signal of main like this mould is because resonance just can be with lower loss by this resonant element, higher mode is then because off resonance and loss is bigger, reached thus that main mould passes through in the rectangle overmoded waveguide, the effect of the mode filter that higher mode suppresses.The parallel matrix of many groups is the inhibition that a plurality of resonant elements can be strengthened higher mode, and because the adjacent, parallel matrix belongs to a resonant element together, therefore the distance between two groups of adjacent, parallel matrixs is shorter, its scope less than the guide wavelength of main mould between two to three times of the main mould guide wavelengths, thereby the length of whole mode filter is shorter.
Beneficial effect: the invention has the beneficial effects as follows that the transmission of a plurality of higher modes is suppressed in the rectangle overmoded waveguide, and the loss of main mould is less, calculating shows, in same frequency, the loss of a plurality of higher modes is all greater than 20dB, and the loss of main mould is less than 1dB; In addition of the present invention simple in structure, be easy to processing, and the total length of structure is also less.
Description of drawings
Fig. 1 is structural representation of the present invention.
Have among the figure: rectangle overmoded waveguide 1, matrix 2, the narrow wall 3 of rectangle overmoded waveguide inner chamber, the wide wall 4 of rectangle overmoded waveguide inner chamber, resonant element 5.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
The technical solution adopted in the present invention is: compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide comprises rectangle overmoded waveguide and matrix; Wherein: matrix is positioned at the inside of rectangle overmoded waveguide, the transverse cross-section parallel of itself and rectangle overmoded waveguide; Matrix is thin conductor piece, and it is shaped as rectangle; In the same cross section of rectangle overmoded waveguide, all identical matrixs of two parallel in shape and size are arranged; In these two matrixs, matrix is against a narrow wall of inner chamber of rectangle overmoded waveguide, and another piece matrix is then against the narrow wall of another one inner chamber of rectangle overmoded waveguide; Two matrixs like this constitute one group of parallel matrix; The height of matrix in the rectangle overmoded waveguide equals the height of the narrow wall of rectangle overmoded waveguide inner chamber, thereby matrix connects two wide walls of inner chamber up and down of rectangle overmoded waveguide; Therefore the width of matrix has the slit less than half of the wide wall width of rectangle overmoded waveguide inner chamber between the parallel matrix of the same cross section of rectangle overmoded waveguide; All identical parallel matrixs of two groups or more shape and size are arranged in the rectangle overmoded waveguide; The parallel matrix of two adjacent groups and the rectangle overmoded waveguide space between the parallel matrix of two adjacent groups has just constituted a resonant element.As long as on operating frequency, the size of rectangle overmoded waveguide, the width of matrix, the thickness of matrix, and the distance between two groups of parallel matrixs satisfies the condition of resonance of main mould, then make on operating frequency, main mould resonance in resonant element of rectangle overmoded waveguide, higher mode in the rectangle overmoded waveguide is then in the resonant element off resonance, the signal of main like this mould is because resonance just can be with lower loss by this resonant element, higher mode is then because off resonance and loss is bigger, reached thus that main mould passes through in the rectangle overmoded waveguide, the effect of the mode filter that higher mode suppresses.The parallel matrix of many groups is the inhibition that a plurality of resonant elements can be strengthened higher mode, and because the parallel matrix of two adjacent groups belongs to a resonant element together, the length of whole mode filter is shorter.
Structurally, compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide is made up of rectangle overmoded waveguide 1 and matrix 2; Wherein: matrix 2 is positioned at the inside of rectangle overmoded waveguide 1, the transverse cross-section parallel of itself and rectangle overmoded waveguide 1; Matrix 2 is thin conductor piece, and it is shaped as rectangle; In the same cross section of rectangle overmoded waveguide 1, two parallel matrixs 2 are arranged; In these two matrixs 2, matrix 2 is against the narrow wall 3 of an inner chamber of rectangle overmoded waveguide 1,2 narrow walls 3 of the another one inner chamber against rectangle overmoded waveguide 1 of another piece matrix; Two matrixs 2 like this constitute one group of parallel matrix; The height of matrix 2 in rectangle overmoded waveguide 1 equals the height of the narrow wall 3 of rectangle overmoded waveguide 1 inner chamber, thereby matrix 2 connects two wide walls 4 of inner chamber up and down of rectangle overmoded waveguide 1; Therefore the width of matrix 2 has the slit less than half of the wide wall width 4 of rectangle overmoded waveguide 1 inner chamber between the matrix 2 of rectangle overmoded waveguide 1 same transverse cross-section parallel, the width in slit can be determined according to the condition of resonance of main mould; 1 li parallel matrix 2 that two groups or more is arranged of rectangle overmoded waveguide; The parallel matrix 2 of two adjacent groups and rectangle overmoded waveguide 1 space between the parallel matrix 2 of two adjacent groups has just constituted a resonant element 5; Two groups of above parallel matrixs 2 also can be arranged, two or more resonant element 5 is so just arranged; Different with rectangular waveguide matrix filter, distance in the resonant element between two groups of parallel matrixs 2 needs not be equal to quarter-wave guide wavelength or 1/2nd guide wavelengths of rectangle overmoded waveguide master mould, usually the distance between the parallel matrix of two adjacent groups be in from less than the guide wavelength of main mould to the scope two to three times of the main mould guide wavelengths.
On making, the material of rectangle overmoded waveguide 1 and matrix 2 can be good conductors such as copper or aluminium, also can be gold-plated or silver-colored on these materials; Rectangle overmoded waveguide 1 can be divided into several sections making, then the matrix of making 2 is clipped between two sections waveguides.
According to the above, just can realize the present invention.
Claims (4)
1. a compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide is characterized in that this higher mode multimode mode filter comprises rectangle overmoded waveguide (1) and matrix (2); Matrix (2) is positioned at the inside of rectangle overmoded waveguide (1), the transverse cross-section parallel of itself and rectangle overmoded waveguide (1); Matrix (2) is thin conductor piece, and it is shaped as rectangle; In the same cross section of rectangle overmoded waveguide (1), two parallel matrixs (2) are arranged; In these two matrixs (2), a matrix (2) is against the narrow wall of inner chamber (3) of rectangle overmoded waveguide (1), and another piece matrix (2) is then against the narrow wall of another one inner chamber (3) of rectangle overmoded waveguide (1); Two matrixs (2) like this constitute one group of parallel matrix; The height of matrix (2) in rectangle overmoded waveguide (1) equals the height of the narrow wall of rectangle overmoded waveguide (1) inner chamber (3); The width of matrix (2) is less than half of rectangle overmoded waveguide (1) the wide wall width of inner chamber (4); There is two groups or more parallel matrix (2) rectangle overmoded waveguide (1) lining; The parallel matrix of two adjacent groups (2) and rectangle overmoded waveguide (1) space between the parallel matrix of two adjacent groups (2) constitutes a resonant element (5).
2. compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide according to claim 1, it is characterized in that on operating frequency, the main mould of rectangle overmoded waveguide (1) is at resonant element (5) resonance, and the higher mode of rectangle overmoded waveguide (1) is at resonant element (5) resonance not.
3. compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide according to claim 1 and 2, it is characterized in that the distance between the parallel matrix of two adjacent groups (2) in the resonant element (5) be in from less than the guide wavelength of the main mould of rectangle overmoded waveguide (1) to two to three times of the main mould guide wavelengths of rectangle overmoded waveguide (1).
4. compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide according to claim 1 is characterized in that the shape and size of all parallel matrixs (2) are all identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010106328 CN101728601B (en) | 2010-02-02 | 2010-02-02 | Compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010106328 CN101728601B (en) | 2010-02-02 | 2010-02-02 | Compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide |
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| Publication Number | Publication Date |
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| CN101728601A CN101728601A (en) | 2010-06-09 |
| CN101728601B true CN101728601B (en) | 2013-07-10 |
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| CN102324624B (en) * | 2011-06-09 | 2013-12-11 | 中国工程物理研究院电子工程研究所 | Ultra wideband waveguide slot array unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3969691A (en) * | 1975-06-11 | 1976-07-13 | The United States Of America As Represented By The Secretary Of The Navy | Millimeter waveguide to microstrip transition |
| CN101183741A (en) * | 2007-12-13 | 2008-05-21 | 成都赛纳赛德科技有限公司 | Compact multimode cavity |
| CN101599566A (en) * | 2009-04-30 | 2009-12-09 | 成都赛纳赛德科技有限公司 | Rectangular bimodule filter |
| CN201804984U (en) * | 2010-02-02 | 2011-04-20 | 东南大学 | Compact multistage high-order mode filter for rectangular over-mode waveguide |
-
2010
- 2010-02-02 CN CN 201010106328 patent/CN101728601B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3969691A (en) * | 1975-06-11 | 1976-07-13 | The United States Of America As Represented By The Secretary Of The Navy | Millimeter waveguide to microstrip transition |
| CN101183741A (en) * | 2007-12-13 | 2008-05-21 | 成都赛纳赛德科技有限公司 | Compact multimode cavity |
| CN101599566A (en) * | 2009-04-30 | 2009-12-09 | 成都赛纳赛德科技有限公司 | Rectangular bimodule filter |
| CN201804984U (en) * | 2010-02-02 | 2011-04-20 | 东南大学 | Compact multistage high-order mode filter for rectangular over-mode waveguide |
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