CN201804992U - Ultralow temperature drift U-shaped short circuiter rectangular waveguide resonant cavity - Google Patents
Ultralow temperature drift U-shaped short circuiter rectangular waveguide resonant cavity Download PDFInfo
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- CN201804992U CN201804992U CN2010201090483U CN201020109048U CN201804992U CN 201804992 U CN201804992 U CN 201804992U CN 2010201090483 U CN2010201090483 U CN 2010201090483U CN 201020109048 U CN201020109048 U CN 201020109048U CN 201804992 U CN201804992 U CN 201804992U
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- circuiting device
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Abstract
An ultralow temperature drift U-shaped short circuiter rectangular waveguide resonant cavity relates to a waveguide resonant cavity, and is capable of reducing the influence of temperature on the resonance frequency of TE101 and TEm0n resonant cavity modes. The ultralow temperature drift U-shaped short circuiter rectangular waveguide resonant cavity includes a metal cavity (1), a U-shaped short circuiter (2), a support body (3) and one or more input and output coupling devices (4), wherein the U-shaped short circuiter (2) is located in the metal cavity (1); one end of the support body (3) is connected with a top surface cavity wall (6) of the metal cavity (1), and the other end of the support body (2) is connected with a bottom surface (5); the U-shaped short circuiter (2), a top surface cavity wall (9) of the metal cavity (1), and two side surface cavity walls (10) and upper and lower surface cavity walls (8) of the metal cavity form a resonance space (11) of electromagnetic waves; and the input and output coupling devices (4) are located on the top surface cavity wall (9), a narrow surface cavity wall (10) or a wide surface cavity wall (8) of the metal cavity (1) in the resonance space (11).
Description
Technical field
The utility model patent relates to a kind of waveguide resonant cavity, especially a kind of ultra-low temperature drift U-shaped short-circuiting device rectangular-wave resonant cavity that can reduce resonance frequency temperature drift.
Background technology
The resonance frequency of waveguide 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 resonant cavity chamber wall material, the size of resonant cavity also can change, and causes the resonance frequency of resonant cavity to change thus, 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 to the method for resonant cavity resonance frequency influence, perhaps adopts little cavity material of thermal coefficient of expansion such as invar, perhaps adopts additional temperature compensation and control device or the like.The subject matter of these methods is: the equipment needed thereby complexity, perhaps the magnetic confinement of cavity material the application scenario, perhaps need the temperature compensation and control device that adds, perhaps can not reduce the influence of temperature significantly to the resonant cavity resonance frequency.
Summary of the invention
Technical problem: the purpose of this utility model is to propose a kind of ultra-low temperature drift U-shaped short-circuiting device rectangular-wave resonant cavity, and this resonant cavity can significantly reduce temp changes the influence to the resonant cavity resonance frequency.
Technical scheme: ultra-low temperature drift U-shaped short-circuiting device rectangular-wave resonant cavity of the present utility model is made up of metallic cavity, U-shaped short-circuiting device, supporter and one or several input and output coupling devices; Wherein, the U-shaped short-circuiting device is arranged in metallic cavity, and of supporter is connected with the end face chamber wall of metallic cavity, and the other end of supporter is connected with the bottom surface of U-shaped short-circuiting device; Another end face chamber wall of U-shaped short-circuiting device, metallic cavity, chamber, the two sides wall of metallic cavity reach up and down, and face width face chamber wall has constituted electromagnetic resonance space; The input and output coupling device is positioned on the end face chamber wall of metallic cavity of resonance space part or leptoprosopy chamber wall or wide the chamber wall.
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 support body material and metallic cavity material coefficient of thermal expansion coefficient greater than metallic cavity end face chamber wall to the ratio of the distance between the wall of end face chamber with supporter length.Two sides of U-shaped short-circuiting device are parallel with wide chamber wall of metallic cavity, and the bottom surface of U-shaped short-circuiting device is parallel with the end face chamber wall of metallic cavity.The bottom shape of U-shaped short-circuiting device is a rectangle, and its undersized can slide the U-shaped short-circuiting device in the size of metallic cavity end face chamber wall in metallic cavity.
Wherein: the U-shaped short-circuiting device is positioned at metallic cavity, short-circuiting device be shaped as U-shaped, the bottom surface of U-shaped short-circuiting device is parallel with the end face chamber wall of metallic cavity, U-shaped short-circuiting device bottom shape is a rectangle, its undersized is in the size of metallic cavity end face chamber wall, can keep good short circuit effect like this, can not make the slip that the U-shaped short-circuiting device can't be in metallic cavity again, two sides of U-shaped short-circuiting device are parallel with wide chamber wall of metallic cavity, the area of the side of U-shaped short-circuiting device is bigger, slit between these sides and wide sidewall of metallic cavity is very little simultaneously, so just can keep good electrical contact between wide sidewall of U-shaped short-circuiting device and metallic cavity; Supporter is between metallic cavity end face chamber wall and short-circuiting device bottom surface, and of supporter is connected with the end face chamber wall of metallic cavity, and the other end of supporter is connected with the bottom surface of short-circuiting device; Electromagnetic wave resonance occurs in the cuboid resonance space that is made of two leptoprosopy chamber walls of another end face chamber wall of U-shaped short-circuiting device, metallic cavity, metallic cavity and two wide chamber walls; Resonance master mould TE
101Pattern and higher order resonances pattern TE
M0nResonance frequency and U-shaped short-circuiting device do not have the distance dependent of another end face chamber wall of supporter to metallic cavity, also and the distance dependent between the wall of a pair of leptoprosopy of resonant cavity chamber, these two distances are long more, TE
101And TE
M0nThe resonance frequency of pattern is low more; The material that constitutes metallic cavity and short-circuiting device is the metal material that conducts electricity very well; Constitute the thermal coefficient of expansion of the material coefficient of thermal expansion coefficient of supporter greater than cavity material; When temperature raises, because thermal expansion, metallic cavity all increases in the length of three directions, the length of supporter also increases, but because the thermal coefficient of expansion of support body material is greater than metallic cavity material coefficient of thermal expansion coefficient, when the ratio of distance between supporter length and the metallic cavity end face chamber wall during greater than the ratio of the thermal coefficient of expansion of metallic cavity material coefficient of thermal expansion coefficient and support body material, the distance that the temperature increase can make short-circuiting device not have to metallic cavity between another end face chamber wall of supporter reduces, can compensate the increase of distance between the wall of two leptoprosopy chambeies of metallic cavity like this and cause change of resonance frequency, therefore under the situation that temperature rises, can keep TE
101And TE
M0nThe resonance frequency of pattern is constant substantially; When in like manner temperature descends, TE
101And TE
M0nIt is constant substantially that the resonance frequency of pattern also can keep.
Beneficial effect: the beneficial effects of the utility model are to have reduced the TE of rectangular cavity significantly
101And TE
M0nThe resonance frequency of pattern is with variation of temperature, and simple in structure, is suitable for wide frequency range, also do not need the function of temperature compensation control mechanism of adding.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Have among the figure: metallic cavity 1, U-shaped short-circuiting device 2, supporter 3, input and output coupling device 4, bottom surface 5, end face chamber wall 6, side 7, wide chamber wall 8, another end face chamber wall 9, chamber, two sides wall 10, resonance space 11.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
The embodiment that the utility model adopted is: ultra-low temperature drift U-shaped short-circuiting device rectangular-wave resonant cavity comprises metallic cavity, U-shaped short-circuiting device, supporter and one or several input and output coupling devices.The shape of metallic cavity can be a cuboid, also can be leptoprosopy and wide equal square.The U-shaped short-circuiting device is positioned at metallic cavity, the material of short-circuiting device is a conducting metal, also can be on non-metal material surface plated metal, short-circuiting device be shaped as U-shaped, the bottom surface of U-shaped short-circuiting device is parallel with the end face chamber wall of metallic cavity, U-shaped short-circuiting device bottom shape is a rectangle, its undersized is in the size of metallic cavity end face chamber wall, can keep good short circuit effect like this, can not make the slip that the U-shaped short-circuiting device can't be in metallic cavity again, two sides of U-shaped short-circuiting device are parallel with wide chamber wall of metallic cavity, the area of the side of U-shaped short-circuiting device is bigger, slit between these sides and wide sidewall of metallic cavity is very little simultaneously, so just can keep good electrical contact between wide sidewall of U-shaped short-circuiting device and metallic cavity; Supporter is between metallic cavity end face chamber wall and short-circuiting device bottom surface, and of supporter is connected with the end face chamber wall of metallic cavity, and the other end of supporter is connected with the bottom surface of short-circuiting device; Electromagnetic wave resonance occurs in the cuboid resonance space that is made of two leptoprosopy chamber walls of another end face chamber wall of U-shaped short-circuiting device, metallic cavity, metallic cavity and two wide chamber walls; The input and output coupling device is positioned on the chamber wall of metallic cavity of resonance space, and input and output coupling device quantity can be one or more than one.Resonance master mould TE
101Pattern and higher order resonances pattern TE
M0nResonance frequency and U-shaped short-circuiting device do not have the distance dependent of another end face chamber wall of supporter to metallic cavity, also and the distance dependent between the wall of a pair of leptoprosopy of resonant cavity chamber, these two distances are long more, TE
101And TE
M0nThe resonance frequency of pattern is low more; The material of supporter can be a metal, also can be nonmetal, and as plastics or the like, 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 three directions, the length of supporter also increases, but because the thermal coefficient of expansion of support body material is greater than metallic cavity material coefficient of thermal expansion coefficient, when the ratio of distance between supporter length and the metallic cavity end face chamber wall during greater than the ratio of the thermal coefficient of expansion of metallic cavity material coefficient of thermal expansion coefficient and support body material, the distance that the temperature increase can make the U-shaped short-circuiting device not have another end face chamber wall of supporter to metallic cavity reduces, can compensate the increase of distance between the wall of two leptoprosopy chambeies of metallic cavity and cause change of resonance frequency, under the situation that temperature rises, can keep TE like this
101And TE
M0nThe resonance frequency of pattern is constant substantially; When in like manner temperature descends, TE
101And TE
M0n1It is constant substantially that the resonance frequency of pattern also can keep.
Structurally, ultra-low temperature drift U-shaped short-circuiting device rectangular-wave resonant cavity is made up of a metallic cavity 1, U-shaped short-circuiting device 2, supporter 3 and one or several input and output coupling devices 4.Wherein, U-shaped short-circuiting device 2 is positioned at metallic cavity 1, U-shaped short-circuiting device 2 be shaped as U-shaped, the bottom surface 5 of U-shaped short-circuiting device 2 is parallel with the end face chamber wall 6 of metallic cavity, two sides 7 of U-shaped short-circuiting device 2 are parallel with wide chamber wall 8 of metallic cavity, the area of the side 7 of U-shaped short-circuiting device 2 is bigger, and the slit between these sides 7 and 1 wide sidewall of metallic cavity 8 is very little simultaneously, so just can keep good electrical contact between U-shaped short-circuiting device 2 and metallic cavity 1 wide sidewall 8; Supporter 3 is between 1 one end face chambeies of metallic cavity wall 6 and short-circuiting device bottom surface 5, and of supporter 3 is connected with the end face chamber wall 6 of metallic cavity 1, and the bottom surface 5 of the other end of supporter 2 and U-shaped short-circuiting device 2 is connected; Two leptoprosopy chamber walls 10 and two wide chamber walls 8 of another end face chamber wall 9 of U-shaped short-circuiting device 2, metallic cavity 1, metallic cavity 1 have constituted cuboid resonance space 11; Input and output coupling device 4 is positioned on the end face chamber wall 9 of metallic cavity 1 of resonance space 11 or leptoprosopy chamber wall 10 or wide the chamber wall 8, and input and output coupling device quantity can be one or more than one.
On making, metallic cavity 1 and short-circuiting device 2 should be selected the made that conducts electricity very well for use, or be coated with the non-conducting material manufacturing of electric conducting material with the surface, bottom surface 5 shapes of U-shaped short-circuiting device 2 are rectangles, its undersized is in the size of metallic cavity end face chamber wall 6, can keep good short circuit effect like this, can not make that again U-shaped short-circuiting device 2 can't be in the slip in the metallic cavity 1, the surface of metallic cavity 1 and U-shaped short-circuiting device 2 can be gold-plated, 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 a 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 metallic cavity 1 end face chamber wall 6 arrive the ratio of the ratio of distance between the wall 9 of end face chamber greater than metallic cavity 1 material coefficient of thermal expansion coefficient and supporter 3 material coefficient of thermal expansion coefficients, so that temperature is when increasing, U-shaped short-circuiting device 2 reduces to the distance of another end face chamber wall 9 of metallic cavity 1 no supporter, change with the resonance frequency that causes apart from increase between 1 two leptoprosopy chambeies of compensation metallic cavity wall 10 because of thermal expansion, therefore under the situation that temperature rises or descends, can keep TE
101And TE
M0nThe resonance frequency of pattern is constant substantially.According to the above, just can realize the utility model.
Claims (5)
1. ultra-low temperature drift U-shaped short-circuiting device rectangular-wave resonant cavity is characterized in that this ultra-low temperature drift U-shaped short-circuiting device rectangular-wave resonant cavity is made up of metallic cavity (1), U-shaped short-circuiting device (2), supporter (3) and one or several input and output coupling devices (4); Wherein, U-shaped short-circuiting device (2) is arranged in metallic cavity (1), and of supporter (3) is connected with the end face chamber wall (6) of metallic cavity (1), and the other end of supporter (2) is connected with the bottom surface (5) of U-shaped short-circuiting device (2); Another end face chamber wall (9) of U-shaped short-circuiting device (2), metallic cavity (1), chamber, the two sides wall (10) of metallic cavity reach up and down, and face width face chamber wall (8) has constituted electromagnetic resonance space (11); Input and output coupling device (4) is positioned on the end face chamber wall (9) or leptoprosopy chamber wall (10) or wide chamber wall (8) of resonance space (11) metallic cavity (1) partly.
2. ultra-low temperature drift U-shaped short-circuiting device rectangular-wave resonant cavity according to claim 1 is characterized in that the thermal coefficient of expansion of the thermal coefficient of expansion of metallic cavity (1) less than supporter (3).
3. ultra-low temperature drift U-shaped short-circuiting device rectangular-wave resonant cavity according to claim 1 and 2, the ratio that it is characterized in that supporter (3) material coefficient of thermal expansion coefficient and metallic cavity (1) material coefficient of thermal expansion coefficient greater than metallic cavity (1) end face chamber wall (6) to the ratio of the distance between the end face chamber wall (9) with supporter (3) length.
4. ultra-low temperature drift U-shaped short-circuiting device rectangular-wave resonant cavity according to claim 1, two sides (7) that it is characterized in that U-shaped short-circuiting device (2) are parallel with wide the chamber wall (8) of metallic cavity (1), and the bottom surface (5) of U-shaped short-circuiting device (2) is parallel with the end face chamber wall (6) of metallic cavity (1).
5. according to claim 1 or 4 described ultra-low temperature drift U-shaped short-circuiting device rectangular-wave resonant cavities, bottom surface (5) shape that it is characterized in that U-shaped short-circuiting device (2) is a rectangle, its undersized can slide U-shaped short-circuiting device (2) in the size of metallic cavity (1) end face chamber wall (6) in metallic cavity (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201090483U CN201804992U (en) | 2010-02-02 | 2010-02-02 | Ultralow temperature drift U-shaped short circuiter rectangular waveguide resonant cavity |
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| CN2010201090483U CN201804992U (en) | 2010-02-02 | 2010-02-02 | Ultralow temperature drift U-shaped short circuiter rectangular waveguide resonant cavity |
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| CN201804992U true CN201804992U (en) | 2011-04-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752641B (en) * | 2010-02-02 | 2012-09-19 | 东南大学 | Rectangular waveguide resonant cavity of U-shaped temperature compensated short circuiter |
| CN103151587A (en) * | 2013-03-27 | 2013-06-12 | 华为技术有限公司 | Cavity filter |
| CN109212322A (en) * | 2018-10-31 | 2019-01-15 | 厦门大学 | A kind of method of Multifunctional rectangular chamber perturbation method detection nano thin-film complex permittivity |
-
2010
- 2010-02-02 CN CN2010201090483U patent/CN201804992U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752641B (en) * | 2010-02-02 | 2012-09-19 | 东南大学 | Rectangular waveguide resonant cavity of U-shaped temperature compensated short circuiter |
| CN103151587A (en) * | 2013-03-27 | 2013-06-12 | 华为技术有限公司 | Cavity filter |
| CN109212322A (en) * | 2018-10-31 | 2019-01-15 | 厦门大学 | A kind of method of Multifunctional rectangular chamber perturbation method detection nano thin-film complex permittivity |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20140202 |