CN102623784A - Resonator and cavity filter - Google Patents
Resonator and cavity filter Download PDFInfo
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- CN102623784A CN102623784A CN2011102330055A CN201110233005A CN102623784A CN 102623784 A CN102623784 A CN 102623784A CN 2011102330055 A CN2011102330055 A CN 2011102330055A CN 201110233005 A CN201110233005 A CN 201110233005A CN 102623784 A CN102623784 A CN 102623784A
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Abstract
The invention provides an improved resonator and a cavity filter using the same. The resonator comprises a resonator cavity, a cover plate and a T-shaped resonant body, the T-shaped resonant body comprises an upper end and a lower end, a cylindrical cavity is arranged at the center of the upper end, and the diameter of the upper end is larger than that of the lower end. By the aid of an improved resonant body structure, both the height and the diameter of the resonant body are reduced, so that the size and the weight of the resonator cavity are reduced, better performances can be obtained, the production process is simple, and the production cost is reduced.
Description
Technical field
The present invention relates to wave filter technology, relate in particular to a kind of improved resonator and use the cavity body filter of this resonator.
Background technology
In modern age telecommunication apparatus and all kinds of control system, filter applies is very extensive; In all electronic units, use at most, what technology was the most complicated will calculate filter.The quality of the good and bad directly decision product of filter, so, the research and the production of filter are always paid attention to by various countries.
Cavity body filter is widely used in filtering of communication base station leading portion and intermodulation testing instrument now, and it is used for the outer high reject signal of filtering band as the high power band pass filter.Cavity body filter generally is made up of one or several resonators; The structure of each resonator is as shown in Figure 1; Comprise resonant body 11, resonant cavity 12, be used for resonant body 11 is fixed in the inner resonant body trip bolt 13 of resonant cavity 12, tuning screw 14, cover plate 15 and be used for the cover plate trip bolt 16 of fastening cover plate 15.The filter of cavity body filter and other character compares, and sound construction is stable and reliable for performance, and the Q value is high, and loss is little, and power capacity is high, and the far away and perfect heat-dissipating of high order parasitic passband can be used for the high-power applications occasion.But the major defect of existing cavity body filter is that it is relatively poor relatively in volume control.And the principal element that causes this reason just in the resonator design volume controlled range of resonant body little, thereby make the cavity volume of resonator huge.Mostly existing resonant body shape is the matrix cylinder shown in the resonant body 11 of Fig. 1, highly is about λ/8.A part of improved design has adopted resonator as shown in Figure 2 in the middle of the prior art; Comprise resonant body 21, resonant cavity 22, be used for resonant body 21 is fixed in the inner resonant body trip bolt 23 of resonant cavity 22, tuning screw 24, cover plate 25 and be used for the cover plate trip bolt 26 of fastening cover plate 25.Wherein the top of resonant body 21 has outward extending capacitance disk structure; Thereby reduced the resonator height to a certain extent, but its processing technology is complicated relatively more, cost is very high; And in order to guarantee frequency compression; The topside area of resonator increases, and make that the diameter of cavity is still bigger, thereby the volume-diminished degree is limited.
Because the development of computer technology, integrated technique and material industry; The filter development steps on a new stage; And towards low-power consumption, high accuracy, small size, multi-functional, reliable and stable and cheap direction effort, wherein small size, multi-functional, high accuracy, the reliable and stable main direction that becomes modern Design of Filter.In order to reach above design object, inevitably need to existing filter core component--the design of resonator improves so that reach reduced volume and improve the target of filtering performance.
Summary of the invention
To the problems referred to above of the prior art, the invention provides a kind of improved resonator, and the cavity body filter of using this resonator.Resonator of the present invention has adopted improved resonant body structure; The height and the diameter of resonant body are all dwindled, thereby reduced the volume and weight of resonator cavities, and can obtain more performance; Production technology is simple simultaneously, has reduced production cost.
Resonator provided by the invention; Comprise a resonant cavity and a cover plate; It is characterized in that also comprise a T type resonant body, said T type resonant body is made up of a upper part and an end portion; Center, said upper part is provided with a cylindrical cavity, and the diameter of said upper part is greater than the diameter of said end portion.
Preferably, said resonant cavity has and the incorporate pedestal of cavity, and said T type resonant body is fixed on the said pedestal through the resonant body holding screw.
Preferably, said cover plate is fixed in said resonant cavity with the cover plate holding screw.
Preferably, the center of said cover plate has a tuned window and through said tuned window one tuning screw is set.
Preferably, said resonant cavity is circular cylindrical cavity, rectangular cavities or irregular polygon cavity.
Preferably; Reaching under the situation of identical resonance frequency; Said resonant cavity aspect ratio adopts the resonator cavities height of the resonant body of matrix cylindrical shape to hang down more than 1/4, and said resonant cavity diameter is littler more than 1/5 than the resonator cavities diameter of the resonant body that adopts the matrix cylindrical shape.
The present invention also provides a kind of cavity body filter, it is characterized in that, said cavity body filter comprises an above-mentioned resonator, perhaps is made up of several above-mentioned resonator couplings.
The present invention has dwindled the height and the radius size of resonator effectively owing to adopted above-mentioned novel resonant body, makes the volume and weight of cavity greatly reduce, and on the cavity size after the reduction and then obtain power capacity and Q value preferably.And owing to the integrated technology of production and processing that makes of pedestal and cavity becomes simply, thereby further reduce cost.
Description of drawings
Fig. 1 is a resonator structure sketch map of the prior art;
Fig. 2 is an improved resonator structure sketch map in the prior art;
Fig. 3 is the resonator structure cutaway view of the preferred embodiment of the present invention;
Fig. 4 is the resonator structure exploded perspective sketch map of the preferred embodiment of the present invention.
Embodiment
By specifying technology contents of the present invention, structural feature, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
Fig. 3 is the structural representation of resonator that the preferred embodiment of the present invention provides, and Fig. 4 is the exploded perspective sketch map of this resonator.Below in conjunction with Fig. 3 and Fig. 4 structure, principle and the characteristics of resonator are set forth in detail.Like Fig. 3 and shown in Figure 4, resonator of the present invention comprises a resonant cavity 31, a cover plate 32 and T type resonant body 33.Resonant cavity described in the present embodiment 31 can be a rectangular cavities, but this cavity also can adopt circular cylindrical cavity or irregular polygon cavity.Said T type resonant body 33 is made up of a upper part 33a and an end portion 33b, and can see obviously that from Fig. 3-4 diameter of said upper part 33a is greater than the diameter of said end portion 33b.In order to alleviate resonant body weight, also be provided with a columniform cavity 33c on the central axis of said upper part 33a with convenient tuning.
Said resonant cavity 31 has and the incorporate pedestal 31a of this cavity; With resonant body holding screw 34 said T type resonant body 33 is fixed on the said pedestal 31a; Utilize cover plate trip bolt 35 that cover plate 32 is fixing with resonant cavity 31 again, thereby form resonance loop.Referring to Fig. 4, the center of said cover plate 32 has a tuned window 32a and through said tuned window 32a tuning screw 36 is set.
Utilize T type resonant body of the present invention; Can reduce the height and the diameter of resonant body significantly; Thereby the resonant cavity height that makes resonator is far below plain edition illustrated in figures 1 and 2 and modified model resonator, and the diameter of resonant cavity is also much smaller than plain edition and modified model filter diameter.Those skilled in the art can understand; The height of resonant cavity is relevant with frequency with diameter; Utilize resonator structure of the present invention; Reaching under the situation of identical resonance frequency, said resonant cavity aspect ratio adopts the resonator cavities height of the resonant body of matrix cylindrical shape to hang down more than 1/4, and said resonant cavity diameter is littler more than 1/5 than the resonator cavities diameter of the resonant body that adopts the matrix cylindrical shape.
According to the resonance effect principle; When the induction reactance absolute value is equal with the capacitive reactance absolute value, produce resonance effect; The frequency of this moment is called as resonance frequency; Can use formula
expression; Wherein ω representes angular frequency; L is an inductance value; C is a capacitance, according to formula
wherein f be exactly resonance frequency.Can know that the size of induction reactance L and the height H of resonant body and resonant body diameter D are inversely proportional to, capacitive reactance C is directly proportional with the sectional area size S of cover plate parallel portion with resonant body.The resonant body height of novel resonator is far below plain edition illustrated in figures 1 and 2 and modified model resonator; And the diameter of resonant body is much smaller than plain edition and modified model filter diameter; Induction reactance L is increased; Though the area of resonant body and cover plate parallel portion just between the sectional area of modified model and plain edition resonator and cover plate parallel portion, make the capacitive reactance of resonator generation of the present invention greater than plain edition less than modified model.Relatively and modified model; Amplification the reducing of resonator induction reactance L of the present invention much larger than capacitive reactance C; So under the situation of volume height reduction, still can reach the requirement of frequency compression; Ratio according to L/C is a key factor theory that influences the Q value simultaneously, and the Q value of resonator of the present invention will be higher than plain edition and modified model resonator.
The present invention has dwindled the height and the radius size of resonator effectively owing to adopted above-mentioned novel resonant body, makes the volume and weight of cavity greatly reduce.And on the cavity size after the reduction, can improve electric field and Distribution of Magnetic Field in the resonant cavity, and then obtain power capacity and Q value preferably.And owing to the integrated technology of production and processing that makes of pedestal and cavity becomes simply, thereby further reduce cost.
The present invention also provides a kind of cavity body filter, and said cavity body filter comprises an above-mentioned resonator, perhaps is made up of several above-mentioned resonator couplings.The cavity body filter that utilizes resonator provided by the present invention and form, it has little, the lightweight advantage of volume equally.
The above is merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (7)
1. resonator; Comprise a resonant cavity and a cover plate; It is characterized in that also comprise a T type resonant body, said T type resonant body is made up of a upper part and an end portion; Center, said upper part is provided with a cylindrical cavity, and the diameter of said upper part is greater than the diameter of said end portion.
2. resonant body according to claim 1 is characterized in that: said resonant cavity has and the incorporate pedestal of cavity, and said T type resonant body is fixed on the said pedestal through the resonant body holding screw.
3. resonant body according to claim 1 is characterized in that: said cover plate is fixed in said resonant cavity with the cover plate holding screw.
4. resonant body according to claim 1 is characterized in that: the center of said cover plate has a tuned window and through said tuned window one tuning screw is set.
5. resonant body according to claim 1 is characterized in that: said resonant cavity is circular cylindrical cavity, rectangular cavities or irregular polygon cavity.
6. resonant body according to claim 1; It is characterized in that: reaching under the situation of identical resonance frequency; Said resonant cavity aspect ratio adopts the resonator cavities height of the resonant body of matrix cylindrical shape to hang down more than 1/4, and said resonant cavity diameter is littler more than 1/5 than the resonator cavities diameter of the resonant body that adopts the matrix cylindrical shape.
7. a cavity body filter is characterized in that, said cavity body filter comprises each described resonator among the claim 1-6, perhaps is made up of each described resonator coupling among several claims 1-6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102330055A CN102623784A (en) | 2011-08-16 | 2011-08-16 | Resonator and cavity filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102330055A CN102623784A (en) | 2011-08-16 | 2011-08-16 | Resonator and cavity filter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390787A (en) * | 2013-07-15 | 2013-11-13 | 中国科学院高能物理研究所 | High-power microwave testing platform |
| CN106133998A (en) * | 2014-02-04 | 2016-11-16 | 阿尔卡特朗讯 | Resonator assembly and wave filter |
| CN110474143A (en) * | 2019-09-16 | 2019-11-19 | 苏州诺泰信通讯有限公司 | A kind of resonant column mounting structure suitable for low intermodulation products |
| CN111965436A (en) * | 2020-08-27 | 2020-11-20 | 电子科技大学 | System and method for calibrating electric field intensity in irregular resonant cavity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020089397A1 (en) * | 2000-10-20 | 2002-07-11 | Uno Henningsson | Communication device |
| CN101069321A (en) * | 2004-12-03 | 2007-11-07 | 摩托罗拉公司 | Radio frequency cavity resonatory with heat transport apparatus |
| CN101312263A (en) * | 2008-06-30 | 2008-11-26 | 摩比天线技术（深圳）有限公司 | Cavity filter and duplex device |
| CN201417810Y (en) * | 2009-05-06 | 2010-03-03 | 摩比天线技术（深圳）有限公司 | Wireless communication device with signal port |
-
2011
- 2011-08-16 CN CN2011102330055A patent/CN102623784A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020089397A1 (en) * | 2000-10-20 | 2002-07-11 | Uno Henningsson | Communication device |
| CN101069321A (en) * | 2004-12-03 | 2007-11-07 | 摩托罗拉公司 | Radio frequency cavity resonatory with heat transport apparatus |
| CN101312263A (en) * | 2008-06-30 | 2008-11-26 | 摩比天线技术（深圳）有限公司 | Cavity filter and duplex device |
| CN201417810Y (en) * | 2009-05-06 | 2010-03-03 | 摩比天线技术（深圳）有限公司 | Wireless communication device with signal port |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390787A (en) * | 2013-07-15 | 2013-11-13 | 中国科学院高能物理研究所 | High-power microwave testing platform |
| CN106133998A (en) * | 2014-02-04 | 2016-11-16 | 阿尔卡特朗讯 | Resonator assembly and wave filter |
| US10056665B2 (en) | 2014-02-04 | 2018-08-21 | Alcatel Lucent | Resonator assembly and filter |
| CN110474143A (en) * | 2019-09-16 | 2019-11-19 | 苏州诺泰信通讯有限公司 | A kind of resonant column mounting structure suitable for low intermodulation products |
| CN111965436A (en) * | 2020-08-27 | 2020-11-20 | 电子科技大学 | System and method for calibrating electric field intensity in irregular resonant cavity |
| CN111965436B (en) * | 2020-08-27 | 2023-03-28 | 电子科技大学 | System and method for calibrating electric field intensity in irregular resonant cavity |
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