CN101771186B - Self temperature compensation round waveguide TE011 mode resonant cavity - Google Patents
Self temperature compensation round waveguide TE011 mode resonant cavity Download PDFInfo
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- CN101771186B CN101771186B CN 201010017990 CN201010017990A CN101771186B CN 101771186 B CN101771186 B CN 101771186B CN 201010017990 CN201010017990 CN 201010017990 CN 201010017990 A CN201010017990 A CN 201010017990A CN 101771186 B CN101771186 B CN 101771186B
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Abstract
The invention discloses a self temperature compensation round waveguide TE011 mode resonant cavity which can obviously decrease the influence of the temperature on the resonant frequency of the resonant cavity. In the resonant cavity, a metal cavity (1) is a hollow cylinder; a short-circuit board (2) is arranged in the metal cavity (1); the short-circuit board (2) is connected with an upper bottom cavity wall (5) of the metal cavity (1) by a support (3); the coefficient of thermal expansion of the support (3) is more than the coefficient of thermal expansion of the metal cavity (1); one end of the support (3) is fixed on the upper bottom cavity wall (5) of the metal cavity (1) while the other end is fixed on the short-circuit board (2); the short-circuit board (2) is of a round disc shape and is slightly smaller than the upper bottom cavity wall (5); the short-circuit board (2), an upper bottom cavity wall (6) of the metal cavity (1) and a side wall (7) of the metal cavity (1) form an electromagnetic wave resonance space (8); and an input output coupling device (4) is arranged on the side wall (7) or the upper bottom cavity wall (6) of the metal cavity (1) of the electromagnetic wave resonance space (8).
Description
Technical field
The present invention relates to a kind of waveguide resonant cavity, especially a kind of self temperature compensation circular waveguide TE that can reduce resonance frequency temperature drift
011Mould (also claims H
011Mould is a kind of mode of resonance in the circular waveguide resonant cavity) resonant cavity.
Background technology
The resonance frequency of resonant cavity depends in the shape, size, chamber of resonant cavity fills medium and mode of resonance.When temperature change, because the effect of expanding with heat and contract with cold of resonator wall material, the size of resonant cavity also can change, and causes thus the resonance frequency of resonant cavity to change, and the resonant cavity performance is caused adverse influence.At present, the known variations in temperature that reduces mainly is to adopt constant temperature measures on the method for resonant frequency impact, perhaps adopts additional temperature compensation means, perhaps adopts the little cavity material of thermal coefficient of expansion such as invar etc.The subject matter of these methods is: equipment needed thereby is complicated, perhaps needs the temperature compensation and control device that adds, perhaps can not the decrease temperature on the impact of resonant frequency.
Summary of the invention
Technical problem: the circular waveguide TE that the objective of the invention is to propose a kind of self-temperature compensating
011Mode resonant cavity, this resonant cavity can significantly reduce temp change the impact on resonant frequency.
Technical scheme: self temperature compensation circular waveguide TE of the present invention
011Mode resonant cavity comprises metallic cavity, short board, supporter and one or several input and output coupling devices; Wherein, metallic cavity is hollow cylindrical, short board is arranged in metallic cavity, short board links to each other with the bottom surface chamber wall of metallic cavity by supporter, one of supporter is fixed on chamber, the bottom surface wall of metallic cavity, the other end is fixed on the short board, short board be shaped as disc, its size is slightly less than the size of this chamber, bottom surface wall; The upper bottom surface chamber wall of short board, metallic cavity, the sidewall of metallic cavity have consisted of electromagnetic resonance space, and the input and output coupling device is arranged on the sidewall of resonance space metallic cavity or on the wall of upper bottom surface chamber.
The thermal coefficient of expansion of metallic cavity is less than the thermal coefficient of expansion of supporter.
The ratio of the thermal coefficient of expansion of the thermal coefficient of expansion of support body material and metallic cavity material greater than bottom surface chamber wall to the ratio of the distance between the wall of upper bottom surface chamber with supporter length.
For being slidingly matched closely, needing only short board and be unlikely in metallic cavity, to slide just passable between short board and the metallic cavity sidewall.And in operating temperature range, thermal expansion can be so that these slits disappearances.
Short board is disc, it is connected with chamber, the bottom surface wall of cylindrical metal cavity by supporter, size is approximately equal to the size of this chamber, bottom surface wall, just smaller a little than chamber, bottom surface wall, between the chamber wall of short board and cylindrical metal cavity very small slit is arranged like this, because mode of resonance TE
011The chamber wall electric current of pattern all is mobile round the circumferencial direction of cavity wall, so the slit between short board and the metallic cavity sidewall does not affect TE
011The electromagnetic wave of pattern; Electromagnetic wave resonance occurs in the cylindrical resonance space that the sidewall by another chamber, bottom surface wall of short board, metallic cavity, metallic cavity consists of; Mode of resonance TE
011The resonance frequency of mould and metallic cavity short board are to the distance dependent of metallic cavity without another chamber, bottom surface wall of supporter, and also relevant with the radius of resonant cavity, these two parameters are longer, TE
011The resonance frequency of pattern is lower; The material that consists of metallic cavity and short board is the metal material that conducts electricity very well; The thermal coefficient of expansion of the material of formation supporter is greater than the thermal coefficient of expansion of cavity material; When temperature raises, because thermal expansion, length and the radius of metallic cavity all increase, the length of supporter also increases, but because the thermal coefficient of expansion of support body material is greater than the thermal coefficient of expansion of metallic cavity material, when the ratio of distance between supporter length and chamber, the metallic cavity bottom surface wall during greater than the ratio of the thermal coefficient of expansion of the thermal coefficient of expansion of metallic cavity material and support body material, temperature increase meeting so that short board reduce without the distance between another chamber, bottom surface wall of supporter to metallic cavity, can compensate like this increase of metal cavity wall radius and cause the variation of resonance frequency, therefore in the situation that temperature rises, can keep TE
011The resonance frequency of pattern is substantially constant; In like manner during drop in temperature, TE
011It is substantially constant that the resonance frequency of pattern also can keep.
Beneficial effect: the present invention has significantly reduced the resonance frequency variation with temperature of cylindrical cavity, and simple in structure, and applicable wide frequency range does not need the function of temperature compensation control mechanism of adding yet.
Description of drawings
Fig. 1 is structural representation of the present invention.
Have among the figure: metallic cavity 1, short board 2, supporter 3, input and output coupling device 4, bottom surface chamber wall 5, upper bottom surface chamber wall 6, cavity wall 7, resonance space 8.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Self temperature compensation circular waveguide TE
011Mode resonant cavity comprises supporter and or several input and output coupling devices of metallic cavity, short board, connecting cylinder shape cavity bottom surface and short board.The shape of metallic cavity is cylinder.The material of short board can be the material the same with metallic cavity, it also can be other conductive metallic material, can also be on non-metal material surface plated metal, short board links to each other by chamber, the bottom surface wall of supporter and metallic cavity, short board be shaped as disk, its size is slightly less than the size of this chamber, bottom surface wall, slit between the sidewall of short board and metallic cavity is as far as possible little, as long as guarantee in the normal working temperature scope, short board is unlikely to slide in metallic cavity just passable, because mode of resonance TE
011The chamber wall electric current of pattern all is mobile round the circumferencial direction of cavity wall, so the slit between short board and the metallic cavity sidewall does not affect TE
011The electromagnetic wave of pattern.Electromagnetic wave resonance occurs in the cylinder resonance space that the sidewall by another chamber, bottom surface wall of short board, metallic cavity, metallic cavity consists of.The input and output coupling device is positioned on chamber, the bottom surface wall or sidewall of metallic cavity of resonance space, and input and output coupling device quantity can be one or more than one.Mode of resonance TE
011The resonance frequency of mould and metallic cavity short board are to the distance dependent of metallic cavity without another chamber, bottom surface wall of supporter, and also relevant with the radius of wire chamber body cavity wall, these two parameters are larger, TE
011The resonance frequency of pattern is lower; The material of supporter can be metal, also can be nonmetal, and the thermal coefficient of expansion of supporter is greater than the thermal coefficient of expansion of metallic cavity.When temperature raises, because thermal expansion, metallic cavity all increases in the length of all directions, the length of supporter also increases, but because the thermal coefficient of expansion of support body material is greater than the thermal coefficient of expansion of metallic cavity material, when the ratio of distance between supporter length and chamber, the metallic cavity bottom surface wall during greater than the ratio of the thermal coefficient of expansion of the thermal coefficient of expansion of metallic cavity material and support body material, temperature increase meeting so that short board reduce to the distance of metallic cavity without another chamber, bottom surface wall of supporter, can compensate the increase of metal cavity wall radius and cause the variation of resonance frequency, in the situation that temperature rises like this, can keep TE
011The resonance frequency of pattern is substantially constant; In like manner during drop in temperature, TE
011It is substantially constant that the resonance frequency of pattern also can keep.
Structurally, self temperature compensation circular waveguide TE
011Mode resonant cavity is comprised of a metallic cavity 1, short board 2, supporter 3 and one or several input and output coupling devices 4.One of supporter 3 is fixed on the bottom surface chamber wall 5 of metallic cavity 1, the other end of supporter 3 is fixed on the short board 2, short board 2 links to each other by supporter 3 bottom surface chamber walls 5, short board 2 is parallel with bottom surface chamber wall 5, short board 2 be shaped as disk, its diameter is slightly less than the diameter of bottom surface chamber wall 5, because mode of resonance TE
011The chamber wall electric current of pattern all is mobile round the circumferencial direction of cavity wall, so the slit between short board and the metallic cavity sidewall does not affect TE
011The electromagnetic wave of pattern.The sidewall 7 of short board 2, upper bottom surface chamber wall 6, metallic cavity 1 has consisted of electromagnetic resonance space 8.Input and output coupling device 4 is positioned on the upper bottom surface chamber wall 6 or metallic cavity 1 sidewall 7 of resonance space 8, and input and output coupling device quantity can be one or more than one.
On making, metallic cavity 1 and short board 2 should be selected the material manufacturing that conducts electricity very well, the surface of metallic cavity 1 and short board 2 can be gold-plated, slit between the sidewall 7 of short board 2 and metallic cavity 1 is as far as possible little, as long as guarantee in the normal working temperature scope, short board 2 is unlikely to slide in metallic cavity 1 just passable, supporter 3 can be one or more, the cross section of supporter 3 can be circular or other arbitrary shape, the material of supporter 3 can be metal and nonmetal, the thermal coefficient of expansion of supporter 3 is greater than the thermal coefficient of expansion of metallic cavity 1, supporter 3 length and chamber, metallic cavity 1 bottom surface wall 5 can be according to TE to the ratio of distance between the wall 8 of chamber, the bottom surface ratio greater than the thermal coefficient of expansion of the thermal coefficient of expansion of metallic cavity 1 material and supporter 3 materials
011The formula of pattern resonance frequency and self temperature compensation circular waveguide TE
011The employed material parameter of mode resonant cavity is specifically calculated self temperature compensation circular waveguide TE
011The dimensional parameters of mode resonant cavity, so that temperature is when increasing, short board 2 reduces to the distance of metallic cavity 1 without the upper bottom surface chamber wall 6 of supporter, change because of the resonance frequency that the increase of thermal expansion length causes with the radius of compensation metallic cavity 1 sidewall 7, therefore in the situation that temperature rises or descends, can keep TE
011The resonance frequency of pattern is substantially constant.According to the above, just can realize the present invention.
Claims (3)
1. self temperature compensation circular waveguide TE
011Mode resonant cavity is characterized in that this self temperature compensation circular waveguide resonant cavity comprises metallic cavity (1), short board (2), supporter (3) and one or several input and output coupling devices (4); Wherein, metallic cavity (1) is hollow cylindrical, short board (2) is arranged in metallic cavity (1), short board (2) links to each other with the bottom surface chamber wall (5) of metallic cavity (1) by supporter (3), one of supporter (3) is fixed on the bottom surface chamber wall (5) of metallic cavity (1), the other end is fixed on the short board (2), short board (2) be shaped as disc, its size is slightly less than the size of this bottom surface chamber wall (5); The upper bottom surface chamber wall (6) of short board (2), metallic cavity (1), the sidewall (7) of metallic cavity (1) have consisted of electromagnetic resonance space (8), and input and output coupling device (4) is arranged on the upper or upper bottom surface chamber wall (6) of the sidewall (7) of resonance space (8) metallic cavity (1);
The thermal coefficient of expansion of metallic cavity (1) is less than the thermal coefficient of expansion of supporter (3).
2. self temperature compensation circular waveguide TE according to claim 1
011Mode resonant cavity, the ratio of thermal coefficient of expansion that it is characterized in that the thermal coefficient of expansion of supporter (3) material and metallic cavity (1) material greater than bottom surface chamber wall (5) to the ratio of the distance between the upper bottom surface chamber wall (6) with supporter (3) length.
3. self temperature compensation circular waveguide TE according to claim 1
011Mode resonant cavity is characterized in that between short board (2) and metallic cavity (1) sidewall (7) for being slidingly matched closely, as long as short board (2) is unlikely to slide in metallic cavity (1) just passable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010017990 CN101771186B (en) | 2010-01-19 | 2010-01-19 | Self temperature compensation round waveguide TE011 mode resonant cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010017990 CN101771186B (en) | 2010-01-19 | 2010-01-19 | Self temperature compensation round waveguide TE011 mode resonant cavity |
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| Publication Number | Publication Date |
|---|---|
| CN101771186A CN101771186A (en) | 2010-07-07 |
| CN101771186B true CN101771186B (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010017990 Expired - Fee Related CN101771186B (en) | 2010-01-19 | 2010-01-19 | Self temperature compensation round waveguide TE011 mode resonant cavity |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071010A (en) * | 2015-08-26 | 2015-11-18 | 电子科技大学 | Frequency stability resonant cavity and method for obtaining compensating body height |
| CN109888609B (en) * | 2019-03-15 | 2020-04-17 | 山西大学 | Optical cavity with temperature drift self-compensation function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2113558U (en) * | 1992-01-22 | 1992-08-19 | 机械电子工业部石家庄第五十四研究所 | High frequency stability coaxial resonance cavity body device |
| CN1819331A (en) * | 2004-12-21 | 2006-08-16 | 松下电器产业株式会社 | Temperature compensation of resonators using different materials for housing and inner conductor as well as suitable dimensions |
| CN101069321A (en) * | 2004-12-03 | 2007-11-07 | 摩托罗拉公司 | Radio frequency cavity resonatory with heat transport apparatus |
| CN201285792Y (en) * | 2008-11-04 | 2009-08-05 | 中国传媒大学 | Temperature compensation mechanism for resonator cavity |
-
2010
- 2010-01-19 CN CN 201010017990 patent/CN101771186B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2113558U (en) * | 1992-01-22 | 1992-08-19 | 机械电子工业部石家庄第五十四研究所 | High frequency stability coaxial resonance cavity body device |
| CN101069321A (en) * | 2004-12-03 | 2007-11-07 | 摩托罗拉公司 | Radio frequency cavity resonatory with heat transport apparatus |
| CN1819331A (en) * | 2004-12-21 | 2006-08-16 | 松下电器产业株式会社 | Temperature compensation of resonators using different materials for housing and inner conductor as well as suitable dimensions |
| CN201285792Y (en) * | 2008-11-04 | 2009-08-05 | 中国传媒大学 | Temperature compensation mechanism for resonator cavity |
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| CN101771186A (en) | 2010-07-07 |
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