CN201576725U - Filter for single-stage high-order mode in circular overmoded waveguide - Google Patents
Filter for single-stage high-order mode in circular overmoded waveguide Download PDFInfo
- Publication number
- CN201576725U CN201576725U CN2010201089734U CN201020108973U CN201576725U CN 201576725 U CN201576725 U CN 201576725U CN 2010201089734 U CN2010201089734 U CN 2010201089734U CN 201020108973 U CN201020108973 U CN 201020108973U CN 201576725 U CN201576725 U CN 201576725U
- Authority
- CN
- China
- Prior art keywords
- overmoded waveguide
- circular
- waveguide
- circular overmoded
- mode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
A filter for a single-stage high-order mode in a circular overmoded waveguide relates to a microwave waveguide element, and can simultaneously filter various high-order modes in the circular overmoded waveguide. The mode filter comprises the circular overmoded waveguide (1) and a mold sheet (2), wherein the mold sheet (2) is positioned inside the circular overmoded waveguide (1), adopts a thin conductor piece, and takes a shape of a circular ring; the mold sheet (2) is parallel to the cross section of the circular overmoded waveguide (1); and the external diameter of the circular ring of the mold sheet (2) is equal to the internal diameter of the inner cavity (3) of the circular overmoded waveguide. The transmission of a plurality of high-order modes in the circular overmoded waveguide is refrained while the transmission loss of a principal mode is less; the calculation shows that under the same frequency, the transmission loss of the high-order modes is larger than 20 dB while the transmission loss of the principal mode is less than 1 dB; besides, the utility model has the advantages of simple structure and easy processing.
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 circular 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 circular overmoded waveguide, the operation wavelength of circular waveguide is not only less than main mould TE
11Cut-off wavelength, but also less than some higher modes, for example TM
01, TE
21, TM
11The cut-off wavelength of mould or other higher mode, therefore in circular overmoded waveguide, not only main mould can transmit, some higher modes such as TM
01, TE
21, 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 circular 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 circular overmoded waveguide single-stage higher mode mode filter, and this mode filter is a plurality of higher modes in the circular overmoded waveguide of filtering effectively, and the transmission to circular waveguide master mould simultaneously influences very little.
Technical scheme: circular overmoded waveguide single-stage higher mode mode filter of the present utility model comprises circular overmoded waveguide and matrix; Wherein: matrix is positioned at the inside of circular overmoded waveguide, and matrix is thin conductor piece, and it is shaped as annular, the transverse cross-section parallel of matrix and circular overmoded waveguide, and the annulus external diameter of matrix equals the internal diameter at circular overmoded waveguide inner chamber.
The cross sectional dimensions of circular overmoded waveguide is greater than the cross sectional dimensions of the circular single mode waveguide under the same operating frequency situation, make that not only main mould satisfies transmission conditions in circular overmoded waveguide, and have one or more higher mode also to satisfy transmission conditions and can not be cut off.
On operating frequency, main mould resonance on matrix of circular overmoded waveguide, and the off resonance on matrix of the higher mode of circular overmoded waveguide.
On operating frequency, only with a matrix, be implemented in the circular overmoded waveguide, on same frequency, make main mould can by, filter other a plurality of higher modes simultaneously.
As long as on operating frequency, the size of circular overmoded waveguide, the size of matrix each several part satisfy the condition of resonance of main mould, then make on operating frequency, main mould resonance under the effect of matrix of circular overmoded waveguide, the then off resonance of higher mode in the circular overmoded waveguide, the signal of main like this mould is because resonance just can be with lower loss by this matrix, then to pass through the loss of matrix bigger owing to off resonance for higher mode, reached the effect of the mode filter that in circular overmoded waveguide main mould suppresses by, higher mode thus.
Beneficial effect: the beneficial effects of the utility model are, the transmission of a plurality of higher modes is suppressed in circular overmoded waveguide, and the loss of main mould is less, calculating shows, on 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; Secondly, of the present utility model simple in structure, be easy to processing.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Have among the figure: circular overmoded waveguide 1, matrix 2, circular overmoded waveguide inner chamber 3.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
The embodiment that the utility model adopted is: matrix is positioned at the inside of circular overmoded waveguide, and matrix is thin conductor piece, and it is shaped as annular; The transverse cross-section parallel of matrix and circular overmoded waveguide; The annulus external diameter of matrix equals the internal diameter at circular overmoded waveguide inner chamber.As long as on operating frequency, the internal diameter of the size of circular overmoded waveguide, the annulus of matrix and the thickness of matrix satisfy the condition of resonance of main mould, then make on operating frequency, main mould resonance under the effect of matrix of circular overmoded waveguide, the then off resonance of higher mode in the circular overmoded waveguide, like this on same frequency the signal of main mould because resonance just can pass through this matrix with lower loss, then to pass through the loss of matrix bigger owing to off resonance for higher mode, reached the effect of the mode filter that in circular overmoded waveguide main mould suppresses by, higher mode thus.
Structurally, circular overmoded waveguide single-stage higher mode mode filter is made up of circular overmoded waveguide 1 and matrix 2; Wherein: matrix 2 is positioned at the inside of circular overmoded waveguide 1, and matrix 2 is thin conductor piece, and it is shaped as annular, the transverse cross-section parallel of matrix 2 and circular overmoded waveguide 1; The annulus external diameter of matrix 2 equals the internal diameter at circular overmoded waveguide inner chamber 3; Matrix 2 internal radius can require to determine according to main mould resonance.
On making, the material of circular 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; Circular 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 (4)
1. a circular overmoded waveguide single-stage higher mode mode filter is characterized in that this higher mode mode filter comprises circular overmoded waveguide (1) and matrix (2); Wherein: matrix (2) is positioned at the inside of circular overmoded waveguide (1), matrix (2) is thin conductor piece, it is shaped as annular, the transverse cross-section parallel of matrix (2) and circular overmoded waveguide (1), and the annulus external diameter of matrix (2) equals the internal diameter at circular overmoded waveguide inner chamber (3).
2. circular overmoded waveguide single-stage higher mode mode filter according to claim 1, it is characterized in that the cross sectional dimensions of the cross sectional dimensions of circular overmoded waveguide (1) greater than the circular single mode waveguide under the same operating frequency situation, make that not only main mould satisfies transmission conditions in circular overmoded waveguide, and have one or more higher mode also to satisfy transmission conditions and can not be cut off.
3. circular overmoded waveguide single-stage higher mode mode filter according to claim 2, it is characterized in that on operating frequency, the main mould of circular overmoded waveguide (1) is resonance under matrix (2) effect, and the higher mode of circular overmoded waveguide (1) goes up off resonance at matrix (2).
4. according to claim 2 or 3 described circular overmoded waveguide single-stage higher mode mode filters, it is characterized in that on operating frequency,, be implemented in the circular overmoded waveguide (1) only with a matrix (2), on same frequency, make main mould can by, filter other a plurality of higher modes simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201089734U CN201576725U (en) | 2010-02-02 | 2010-02-02 | Filter for single-stage high-order mode in circular overmoded waveguide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201089734U CN201576725U (en) | 2010-02-02 | 2010-02-02 | Filter for single-stage high-order mode in circular overmoded waveguide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201576725U true CN201576725U (en) | 2010-09-08 |
Family
ID=42696599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201089734U Expired - Lifetime CN201576725U (en) | 2010-02-02 | 2010-02-02 | Filter for single-stage high-order mode in circular overmoded waveguide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201576725U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764275A (en) * | 2010-02-02 | 2010-06-30 | 东南大学 | Single-stage multimode mode filter for high-order modes in round overmoded waveguide |
-
2010
- 2010-02-02 CN CN2010201089734U patent/CN201576725U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764275A (en) * | 2010-02-02 | 2010-06-30 | 东南大学 | Single-stage multimode mode filter for high-order modes in round overmoded waveguide |
| CN101764275B (en) * | 2010-02-02 | 2013-09-04 | 东南大学 | Single-stage multimode mode filter for high-order modes in round overmoded waveguide |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101719579B (en) | Multi-band bandstop filter and multi-band bandpass filter | |
| CN203085713U (en) | Substrate integrated waveguide dual-mode wave filter | |
| CN103904391A (en) | Multi-layer hybrid-mode hexagonal substrate integrated waveguide filter | |
| CN101677145A (en) | Stepped ridge waveguide structure applied to microstrip-waveguide conversion | |
| CN103094646A (en) | Substrate integration waveguide load dielectric resonator filter | |
| CN101764273B (en) | Compact multistage multimode mode filter for high-order modes in round overmoded waveguide | |
| CN103647123B (en) | Half mode substrate integration waveguide horizontal symmetrical filter | |
| CN201804984U (en) | Compact multistage high-order mode filter for rectangular over-mode waveguide | |
| CN201576726U (en) | Compact type filter for multi-stage high-order mode in circular overmoded waveguide | |
| CN101599568A (en) | A kind of band pass filter that suppresses second harmonic | |
| CN201576725U (en) | Filter for single-stage high-order mode in circular overmoded waveguide | |
| CN202564511U (en) | K-wave band broadband band-pass filter | |
| CN201576727U (en) | Rectangular overmoded waveguide and H type mold piece high-order mode filter | |
| CN201699107U (en) | Compact type multi-level high order mode filter with rectangular overmode wave guider and H-shaped matrixes | |
| CN101764275B (en) | Single-stage multimode mode filter for high-order modes in round overmoded waveguide | |
| CN208622911U (en) | A kind of novel three moulds SIW resonant cavity filter | |
| CN101728601B (en) | Compact multilevel higher harmonic mode multimode filter for rectangular overmoded waveguide | |
| CN101394017A (en) | Strip line directional coupler | |
| CN203895577U (en) | Band pass filter based on one third equilateral triangle substrate integration waveguide | |
| CN101728602B (en) | Compact multilevel higher harmonic mode multimode filter for H-type stampers of rectangular overmoded waveguide | |
| CN201060919Y (en) | Arbitrarily dual-frequency band 3dB branch directional coupler | |
| CN201699108U (en) | Rectangular over-moded waveguide single-stage high-order mode filter | |
| CN203085714U (en) | Substrate integrated waveguide filter with direct coupling between source and load | |
| CN115911792A (en) | Double-zero terahertz waveguide filter based on concave resonant cavity | |
| CN101728603B (en) | Single-stage higher harmonic mode multimode filter for rectangular overmoded waveguide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100908 Effective date of abandoning: 20130904 |
|
| RGAV | Abandon patent right to avoid regrant |