CN102723569A - Adjustable resonant cavity - Google Patents
Adjustable resonant cavity Download PDFInfo
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- CN102723569A CN102723569A CN2012102010634A CN201210201063A CN102723569A CN 102723569 A CN102723569 A CN 102723569A CN 2012102010634 A CN2012102010634 A CN 2012102010634A CN 201210201063 A CN201210201063 A CN 201210201063A CN 102723569 A CN102723569 A CN 102723569A
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Abstract
The invention discloses an adjustable resonant cavity which is mainly composed of a cavity body 1 with a hollow structure, a metal ridge structure 2 arranged at the bottom of the cavity body 1, and a metal cylinder 4 penetrating through the cavity body 1 and extending into the cavity body 1, wherein the end of the metal cylinder 4 close to the metal ridge structure 2 is also connected with a capacitive sheet 3; and a clearance exists between the capacitive sheet 3 and the metal ridge structure 2. The adjustable resonant cavity disclosed by the invention has the beneficial effects of simple structure and adjustment mode, low production cost, fine adjustment function and wide adjustment range.
Description
Technical field
The present invention relates to filter, specifically, relate to a kind of tunable cavity of rotatable regulating frequency.
Background technology
The adjustable microwave filter comes across 20th century the forties at first as a kind of brand-new microwave device in the electronic countermeasures battle.It is mainly used in the microwave communication equipment.
Desirable tunable filter should be: (1) has very wide tuning range and narrower passband width, and has very fast tuned speed; (2) in passband, have very little insertion loss, and in stopband, have very high inhibition degree, could guarantee that microwave communication equipment has stronger antijamming capability like this; (3) in whole tuning process, should keep absolute bandwidth and filtering characteristic constant.Yet; In the time of at the beginning, the performance of adjustable microwave filter is very poor, the one, and tuning range is very narrow; The 2nd, passband width can not be done very narrowly again; It is embodied in: bigger bandwidth is along with the rapid broadening of variation of centre frequency, and Insertion Loss increases rapidly in the band, and outer inhibition of band reduces rapidly.
Begin from the fifties, external adjustable microwave Filter Design person are just seeking suitable coupled structure always and are obtaining big tuning range and narrow passband width (assurance filter absolute bandwidth and filter characteristic in whole tuning range is constant).At early sixties, the tuning range of filter only reaches 200MHz, and passband width can not be done very narrowly.At middle nineteen sixties, GL.Matthaei has proposed a kind of method that realizes that absolute bandwidth is constant in the angle from network, but experimental result proof the method is unworkable at all.Up to the seventies, the adjustable extent of filter is just near 300MHz, and in tuning process, relative bandwidth has still bigger variation.From the eighties, how to guarantee that adjustable microwave filter absolute bandwidth and filter characteristic in whole tuning range have not become a key issue of adjustable microwave Design of Filter.
Existing tunable filter is broadly divided into 4 types: ferrite tunable filter, variable capacitance diode tunable filter, micromechanics tunable filter and cavity tunable filter.
The ferrite tunable filter comes regulating frequency through changing the ferrite bias magnetic field.This filter has very wide tuning range and greater than 10000 Q value.Yet tuning system complicacy and overall power are bigger, have limited the application of ferrite tunable filter in wireless communication system.
The variable capacitance diode tunable filter obtains broad research in recent years and has obtained successful Application, but this filter receives the anti-breakdown voltage limit partially of diode and is difficult under high-power condition, use.
The micromechanics tunable filter utilizes adjustable micro-mechanical electric capacity to change the filter operating frequency.The bottleneck of this technology is the maturity and the power capacity of micromechanics manufacturing process.
Coaxial cavity tunable filter is realized tuning through length that changes inner wire or the loading capacitance that changes cavity.This filter construction is simple, power capacity is big, utilizes capacitive load can realize miniaturization, therefore in use in the high-power communication system more.
Summary of the invention
The objective of the invention is to utilize coupling between the tunable cavity tunable filter that designs a mechanism.
For reaching above-mentioned requirement; The technical scheme that the present invention adopts is: a kind of tunable cavity; Mainly by the cavity of hollow structure and be arranged on inside cavity and be positioned at the metal ridge structure on its bottom surface and the metal cylinder that runs through cavity and extend into inside cavity constitutes; Metal cylinder also is connected with capacitance sheet near an end of metal ridge structure, has the gap between capacitance sheet and the metal ridge structure.
Said capacitance sheet is positioned at the top of metal ridge structure.
Said metal ridge structure is the arcuate structure that is fixed on cavity bottom around the axis of metal cylinder.
The height of said metal ridge structure is monotonic increase or successively decrease along clockwise direction.
The axis of said tuning screw and the parallel axes of metal cylinder.
Also run through on the said metal ridge structure and be provided with tuning screw, the axis of said tuning screw and the parallel axes of metal cylinder.
The number of tuning screw is at least 2.
Said tuning screw runs through cavity and extends to the cavity outside away from an end of capacitance sheet.
Based on the description of said structure, design principle of the present invention and method of operation are following: regulate for ease, original resonance structure is all regulated through several tuners.For simplified design, purpose of design of the present invention is to use an adjusting device, with this alternative unnecessary tuner.Therefore, as above-mentioned, the present invention is connected metal cylinder with capacitance sheet, forms a rotary tuning structure.The upper surface of capacitance sheet is fixedly connected with metal cylinder, and metal cylinder can be rotated around the axis of itself, after the rotation, can drive capacitance sheet and be rotated around the axis of metal cylinder.Then, we need design one and the corresponding structure of above-mentioned rotary tuning structure, i.e. metal ridge structure.The metal ridge structure need meet the following conditions, condition 1: the metal ridge structure need be arranged on the below of capacitance sheet.Rotational trajectory according to capacitance sheet; It is the arcuate structure that is fixed on cavity bottom around the axis of metal cylinder that the present invention further designs the metal ridge structure; Be that arcuate structure is that the bottom surface is connected with the cavity bottom surface; Arcuate structure away from an end of cavity bottom surface be shaped as arc or arcuate structure is consistent with the rotational trajectory of capacitance sheet away from the shape of an end of cavity bottom surface, can guarantee that like this metal ridge structure remains at the below of capacitance sheet, above-mentioned is condition 2; Further, different in order to make tuning range, said metal ridge structure is rugged near the upper surface of capacitance sheet, and this states and is condition 3; Further, in order to make us can clearly know the trend of adjusting, therefore, the metal ridge structure of general design height increasing or decreasing along clockwise direction.Like this, we can pass through the rotating metallic cylinder, make us can clearly know the trend of adjusting; Promptly; When we need regulate become big with output frequency, we can make metal cylinder anticlockwise or right rotation, conversely; When we need go out frequency adjustment and diminish, we got final product by the reverse rotation metal cylinder.Concrete direction of rotation is established difference and difference according to design.
What further, said structure can only be general regulates.When being adjusted to the position of the value that we need, in order to make the precision of regulating higher, we have adopted tuning screw.Tuning screw can be rotated from the outside, and it is elongated or shorten to make that tuning screw extend into the part of inside cavity, with this, can realize the purpose of finely tuning.
Concrete implementation is: a kind of tunable cavity, comprise a cavity, and a metal cylinder that runs through cavity is arranged at the top of said cavity, and metal cylinder can be around its rotational; It is the capacitance sheet that starting point radially distributes that the lower end of said metal cylinder connects the axis with metal cylinder; There is a metal ridge structure that is arranged on cavity bottom the below of said capacitance sheet; Said metal ridge structure is the arcuate structure that is fixed on cavity bottom around the axis of metal cylinder, and the height of its metal ridge structure is increasing or decreasing along clockwise direction; Said cavity bottom has tuning screw to pass from cavity bottom, and passes the metal ridge structure, and said tuning screw will be emerged from the upper surface of metal ridge structure, and can outside cavity, regulate.
Compared with prior art, beneficial effect of the present invention is: structure and regulative mode are all simple, and its production cost is low, possesses fine adjustment function, and adjustable range is wide.
Description of drawings
Fig. 1 is the front view in the instance of the present invention.
Fig. 2 is A in the embodiment of the invention-A profile
Label among the figure is expressed as respectively: 1, cavity; 2, metal ridge structure; 3, capacitance sheet; 4, metal cylinder; 5, tuning screw.
Embodiment
Below in conjunction with embodiment the present invention is done to specify further, but embodiment of the present invention is not limited thereto.
Like Fig. 1, shown in 2.A kind of tunable cavity; Mainly by the cavity 1 of hollow structure and to be arranged on cavity 1 inner and be positioned at the metal ridge structure 2 on its bottom surface and run through cavity 1 and extend into cavity 1 inner metal cylinder 4 and constitute; Metal cylinder 4 also is connected with capacitance sheet 3 near an end of metal ridge structure 2, has the gap between capacitance sheet 3 and the metal ridge structure 2.
Said capacitance sheet 3 is positioned at the top of metal ridge structure 2.
The height of said metal ridge structure is monotonic increase or successively decrease along clockwise direction.
Also run through on the said metal ridge structure 2 and be provided with tuning screw 5, the parallel axes of the axis of said tuning screw 5 and metal cylinder 4.
The number of tuning screw 5 is at least 2.
Said tuning screw 5 runs through cavity 1 and extends to cavity 1 outside away from an end of capacitance sheet 3.
Based on the description of said structure, design principle of the present invention and method of operation are following: regulate for ease, original resonance structure is all regulated through several tuners.For simplified design, purpose of design of the present invention is to use an adjusting device, with this alternative unnecessary tuner.Therefore; As above-mentioned, the present invention is connected metal cylinder 4 with capacitance sheet 3, forms a rotary tuning structure; The upper surface of capacitance sheet is fixedly connected with metal cylinder 4; Metal cylinder 4 can be rotated around the axis of itself, after the rotation, can drive capacitance sheet and be rotated around the axis of metal cylinder 4.Then, we need design one and the corresponding structure of above-mentioned rotary tuning structure, and promptly the metal ridge structure 2.Metal ridge structure 2 need meet the following conditions: metal ridge structure 2 need be arranged on the below of capacitance sheet 3, forms resonance; Further, in order to form the tuning range difference, the height of said metal ridge structure is monotonic increase or successively decrease along clockwise direction.
What further, said structure can only be general regulates.When being adjusted to the position of the value that we need, in order to make the precision of regulating higher, we have adopted tuning screw.Tuning screw can be rotated from the outside, and it is elongated or shorten to make that tuning screw extend into the part of inside cavity, with this, can realize the purpose of finely tuning.
Like Fig. 1, shown in 2, on the basis of embodiment 1, the difference of present embodiment and embodiment 1 is: said metal ridge structure 2 is the arcuate structures that are fixed on cavity 1 bottom around the axis of metal cylinder.
The height of metal ridge structure 2 is increasing or decreasing along clockwise direction.
When the capacitance sheet anglec of rotation is excessive; If metal ridge structure 2 is a linear structure, then metal ridge structure 2 can not remain at the below of capacitance sheet 3, therefore; Rotational trajectory according to capacitance sheet 3; It is the arcuate structures that are fixed on cavity 1 bottom around the axis of metal cylinder that the present invention further designs metal ridge structure 2, can guarantee that like this metal ridge structure 2 remains at the below of capacitance sheet 3, and above-mentioned is condition 2.
Further, in order to make us can clearly know the trend of adjusting, therefore, the height of the metal ridge structure 2 of general design is increasing or decreasing along clockwise direction; Like this, we can pass through the rotating metallic cylinder, make us can clearly know the trend of adjusting; That is, when we need regulate become big with output frequency, we can make metal cylinder anticlockwise or right rotation; Conversely, when we need go out frequency adjustment and diminish, we got final product by the reverse rotation metal cylinder.Concrete direction of rotation is established difference and difference according to design.
Concrete implementation is: a kind of tunable cavity, comprise a cavity, and a metal cylinder that runs through cavity is arranged at the top of said cavity, and metal cylinder can be around its rotational; It is the capacitance sheet that starting point radially distributes that the lower end of said metal cylinder connects the axis with metal cylinder; There is a metal ridge structure that is arranged on cavity bottom the below of said capacitance sheet; Said metal ridge structure is the arcuate structure that is fixed on cavity bottom around the axis of metal cylinder, and the height of its metal ridge structure increases progressively along clockwise direction; Said cavity bottom has tuning screw to pass from cavity bottom, and passes the metal ridge structure, and said tuning screw will be emerged from the upper surface of metal ridge structure, and can outside cavity, regulate.
Just can realize the present invention preferably as stated.
Claims (8)
1. tunable cavity; It is characterized in that: mainly by the cavity (1) of hollow structure and to be arranged on cavity (1) inner and be positioned at the metal ridge structure (2) on its bottom surface and run through cavity (1) and extend into the inner metal cylinder (4) of cavity (1) and constitute; Metal cylinder (4) also is connected with capacitance sheet (3) near an end of metal ridge structure (2), has the gap between capacitance sheet (3) and the metal ridge structure (2).
2. a kind of tunable cavity according to claim 1 is characterized in that: said capacitance sheet (3) is positioned at the top of metal ridge structure (2).
3. a kind of tunable cavity according to claim 1 is characterized in that: said metal ridge structure (2) is the arcuate structure that is fixed on cavity (1) bottom around the axis of metal cylinder.
4. a kind of tunable cavity according to claim 3 is characterized in that: the height of metal ridge structure (2) is monotonic increase or successively decrease along clockwise direction.
5. according to any described a kind of tunable cavity among the claim 1-5, it is characterized in that: also run through being provided with tuning screw (5) on the said metal ridge structure (2).
6. according to claims 5 described a kind of tunable cavitys, it is characterized in that: the parallel axes of the axis of said tuning screw (5) and metal cylinder (4).
7. a kind of tunable cavity according to claim 6 is characterized in that: the number of tuning screw (5) is at least 2.
8. a kind of tunable cavity according to claim 6 is characterized in that: said tuning screw (5) runs through cavity (1) and extends to cavity (1) outside away from an end of capacitance sheet (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210201063.4A CN102723569B (en) | 2012-06-19 | 2012-06-19 | Adjustable resonant cavity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210201063.4A CN102723569B (en) | 2012-06-19 | 2012-06-19 | Adjustable resonant cavity |
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| CN102723569A true CN102723569A (en) | 2012-10-10 |
| CN102723569B CN102723569B (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210201063.4A Active CN102723569B (en) | 2012-06-19 | 2012-06-19 | Adjustable resonant cavity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102945994A (en) * | 2012-12-04 | 2013-02-27 | 成都赛纳赛德科技有限公司 | Rotary adjustable filter |
| CN106124796A (en) * | 2016-06-28 | 2016-11-16 | 蚌埠大洋传感系统工程有限公司 | A kind of high accuracy angular-rate sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052756A (en) * | 1989-12-20 | 1991-07-03 | 艾利森电话股份有限公司 | Tuner |
| US5712605A (en) * | 1994-05-05 | 1998-01-27 | Hewlett-Packard Co. | Microwave resonator |
| CN201655941U (en) * | 2010-04-29 | 2010-11-24 | 网拓(上海)通信技术有限公司 | Adjustable cavity body filter |
| CN101950833A (en) * | 2010-10-12 | 2011-01-19 | 福建星海通信科技有限公司 | Adjustable mechanical filter with uniform tuning function |
-
2012
- 2012-06-19 CN CN201210201063.4A patent/CN102723569B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052756A (en) * | 1989-12-20 | 1991-07-03 | 艾利森电话股份有限公司 | Tuner |
| US5712605A (en) * | 1994-05-05 | 1998-01-27 | Hewlett-Packard Co. | Microwave resonator |
| CN201655941U (en) * | 2010-04-29 | 2010-11-24 | 网拓(上海)通信技术有限公司 | Adjustable cavity body filter |
| CN101950833A (en) * | 2010-10-12 | 2011-01-19 | 福建星海通信科技有限公司 | Adjustable mechanical filter with uniform tuning function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102945994A (en) * | 2012-12-04 | 2013-02-27 | 成都赛纳赛德科技有限公司 | Rotary adjustable filter |
| CN106124796A (en) * | 2016-06-28 | 2016-11-16 | 蚌埠大洋传感系统工程有限公司 | A kind of high accuracy angular-rate sensor |
| CN106124796B (en) * | 2016-06-28 | 2019-01-01 | 蚌埠大洋传感系统工程有限公司 | A kind of high-precision angular-rate sensor |
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| CN102723569B (en) | 2015-03-11 |
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