CN201804984U - Compact multistage high-order mode filter for rectangular over-mode waveguide - Google Patents
Compact multistage high-order mode filter for rectangular over-mode waveguide Download PDFInfo
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- CN201804984U CN201804984U CN2010201090163U CN201020109016U CN201804984U CN 201804984 U CN201804984 U CN 201804984U CN 2010201090163 U CN2010201090163 U CN 2010201090163U CN 201020109016 U CN201020109016 U CN 201020109016U CN 201804984 U CN201804984 U CN 201804984U
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- matrix
- overmoded waveguide
- waveguide
- rectangle overmoded
- rectangle
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Abstract
A compact multistage high-order mode filter for a rectangular over-mode waveguide relates to a microwave waveguide component, which can screen out a plurality of types of high-order modes in the rectangular over-mode waveguide at the same frequency and cannot influence the passing of a main mode at the same time. Two parallel templates (2) are arranged in the cross section of the rectangular over-mode waveguide (1); the two parallel templates (2) are respectively positioned on both sides of an inner cavity narrow wall (3), and a group of the template is formed by the two parallel templates (2); the height of the templates (2) in the rectangular over-mode waveguide (1) equals to the height of the inner cavity narrow wall (3) of the rectangular over-mode waveguide (1); the width of each template (2) is less than half of the width of an inner cavity wide wall (4) of the rectangular over-mode waveguide (1); two or more than two groups of the parallel templates (2) are arranged in the rectangular over-mode waveguide (1); and a resonance unit (5) is formed by the two adjacent groups of the parallel templates (2) and the rectangular over-mode waveguide (1) in the space between the two adjacent groups of the parallel templates (2).
Description
Technical field
The utility model 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,,, perhaps be subjected to the restriction of processing technology, need to use overmoded waveguide in order to reduce the loss of waveguide particularly in submillimeter wave or Terahertz frequency range in many occasions.In the rectangle overmoded waveguide, the operation wavelength of rectangular waveguide is not only less than the promptly 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 unusual difficulty of filtering higher mode in the rectangle overmoded waveguide, usual way are flutings or crack on wave guide wall, but slot or crack usually can only a kind of higher mode of filtering.
Summary of the invention
Technical problem: the purpose of this utility model is to propose a kind of higher mode mode filter that can filter in the rectangle overmoded waveguide, and this mode filter is a plurality of higher modes in the overmoded waveguide of filtering rectangle effectively, and the transmission to rectangular waveguide master mould simultaneously influences very little.
Technical scheme: rectangle overmoded waveguide compact multilevel higher mode mode filter of the present utility model 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; 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 not only main mould satisfies transmission conditions in the rectangle overmoded waveguide, 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 effect 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 beneficial effects of the utility model are, 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; Of the present utility model in addition simple in structure, be easy to processing, and the total length of structure is also less.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
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 utility model is described in further detail below in conjunction with drawings and Examples.
The technical scheme that the utility model adopted is: rectangle overmoded waveguide compact multilevel higher mode mode filter 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 matrixs that parallel in shape is all identical with 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; The all identical parallel matrix of two groups or more shape and size is arranged in the rectangle overmoded waveguide; 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 effect 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, rectangle overmoded waveguide compact multilevel higher mode mode filter 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; 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 the 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 utility model.
Claims (3)
1. a rectangle overmoded waveguide compact multilevel higher mode mode filter is characterized in that this higher mode mode filter comprises 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), 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; 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. rectangle overmoded waveguide compact multilevel higher mode mode filter according to claim 1, it is characterized in that the distance between the parallel matrix of two adjacent groups (2) in the resonant element (5) from less than the guide wavelength of the main mould of rectangle overmoded waveguide (1) to three times of the main mould guide wavelength of rectangle overmoded waveguide (1).
3. rectangle overmoded waveguide compact multilevel higher mode mode filter 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 |
|---|---|---|---|
| CN2010201090163U CN201804984U (en) | 2010-02-02 | 2010-02-02 | Compact multistage high-order mode filter for rectangular over-mode waveguide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201090163U CN201804984U (en) | 2010-02-02 | 2010-02-02 | Compact multistage high-order mode filter for rectangular over-mode waveguide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201804984U true CN201804984U (en) | 2011-04-20 |
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ID=43874486
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201090163U Expired - Lifetime CN201804984U (en) | 2010-02-02 | 2010-02-02 | Compact multistage high-order mode filter for rectangular over-mode waveguide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201804984U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709630A (en) * | 2011-06-02 | 2012-10-03 | 无锡波联电科技有限公司 | Filter of satellite communication earth station receiver |
| CN101728601B (en) * | 2010-02-02 | 2013-07-10 | 东南大学 | Compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide |
| CN110506360A (en) * | 2017-03-24 | 2019-11-26 | 株式会社藤仓 | Duplexer |
-
2010
- 2010-02-02 CN CN2010201090163U patent/CN201804984U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728601B (en) * | 2010-02-02 | 2013-07-10 | 东南大学 | Compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide |
| CN102709630A (en) * | 2011-06-02 | 2012-10-03 | 无锡波联电科技有限公司 | Filter of satellite communication earth station receiver |
| CN102709630B (en) * | 2011-06-02 | 2015-09-02 | 无锡波联电科技有限公司 | Filter of satellite communication earth station receiver |
| CN110506360A (en) * | 2017-03-24 | 2019-11-26 | 株式会社藤仓 | Duplexer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110420 Effective date of abandoning: 20130710 |
|
| RGAV | Abandon patent right to avoid regrant |