CN101976750A - Cavity filter - Google Patents
Cavity filter Download PDFInfo
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- CN101976750A CN101976750A CN2010105275695A CN201010527569A CN101976750A CN 101976750 A CN101976750 A CN 101976750A CN 2010105275695 A CN2010105275695 A CN 2010105275695A CN 201010527569 A CN201010527569 A CN 201010527569A CN 101976750 A CN101976750 A CN 101976750A
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- cover plate
- cavity
- elastic cover
- body filter
- filter
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Abstract
The invention discloses a cavity filter as well as a tuning unit and communication equipment of the cavity filter. The cavity filter in the embodiment of the invention comprises a cavity, a resonance rod, a flexible cover plate and a tuning device, wherein the flexible cover plate and the cavity are sealed to form a resonance cavity, the tuning device is arranged outside the resonance cavity and used for applying a force to deform the flexible cover plate so as to change the distance between the flexible cover plate and the resonance rod, and thus, the purpose for tuning the parameters of the filter can be achieved. The cavity filter disclosed in the invention is easy to tune and has improved radio frequency index.
Description
Technical field
The present invention relates to the wave filter technology field, be specifically related to the tuned cell and the communication equipment of a kind of cavity body filter, cavity body filter.
Background technology
Cavity body filter is widely used in the communications field as a kind of frequency selection device, especially field of radio frequency communication.In the base station, filter is used to select signal of communication, clutter or interference signal that the filtering communication signal frequency is outer.
Cavity body filter need satisfy the requirement of various radio-frequency (RF) index by debugging.In the prior art, be by a large amount of adjustment screw of locking on the radio-frequency devices cover plate, the quantity of adjustment screw at least tens, hundreds of is thousands of at most, gos deep into the difference of cavity length by regulating these adjustment screw, thereby reaches the purpose of debugging radio frequency signal index.Traditional filter construction as shown in Figure 1, comprise resonant rod 106, cavity 105, cover plate 104, tuning screw rod 101, cover plate is provided with screwed hole, and tuning screw rod 101 stretches in the resonant cavity by the screwed hole on the cover plate, form structure capacitive with resonant rod 106, regulate filter by the depth of regulating tuning screw rod 101 screw-in cover plates.
In research and practice process to prior art, the present inventor's discovery,
A. filter tuner mode of the prior art is to come tuned frequency to reach tuning purpose by regulating the depth that tuning screw rod enters resonant rod.But under this kind pattern, the structure capacitive that forms between tuning screw rod and the resonant rod is very little, and debug time is very long like this.
B. after debugging was finished, tuning screw rod will be deep in the resonant cavity.And the RF signal transmits at body surface, and the male and fomale(M﹠F) of tuning like this screw rod can have a strong impact on product index, such as third order intermodulation, and Insertion Loss, high-power etc.
Summary of the invention
The embodiment of the invention provides a kind of cavity body filter and comprises the communication equipment of this kind filter, can shorten debug time, optimizes product index.
For solving the problems of the technologies described above, the embodiment of the invention provides a kind of cavity body filter, comprise cavity, resonant rod, described resonant rod is assemblied in the cavity, it is characterized in that, also comprise an elastic cover plate and a tuner, described elastic cover plate and cavity sealing form resonant cavity, described tuner is assemblied in outside the described resonant cavity, apply power by described tuner, the distance between elastic cover plate and the resonant rod is changed, carry out tuning with parameter to filter to elastic cover plate generation deformation.
The embodiment of the invention also provides a kind of communication equipment, and this communication equipment comprises above-mentioned cavity body filter, and this cavity body filter is located at the transceiver circuit part of this communication equipment, is used for signal is selected.
With respect to prior art, cavity body filter and communication equipment that the embodiment of the invention provides have the following advantages:
A. the relative area of the elastic cover plate of cavity body filter and resonant rod will be far longer than the relative area of tuning screw rod and resonant rod, and also promptly under this pattern, electric capacity enlarges markedly, and tuning sensitivity increases.Therefore, easily tuning, the tuning time shortens greatly, has improved production efficiency.
The B.RF signal transmits by body surface, therefore, body surface is smooth more, the distributed capacitance that also is cavity inner surface formation is even more, the linearity of signal transmission is just good more, have only elastic cover plate and the formed integral body of cavity wall and resonance bar to form structure capacitive in the resonant cavity of the cavity body filter in the embodiment of the invention, tuning screw rod is isolated in outside the resonant cavity, influence structure capacitive by regulating elastic cover plate, like this with regard to reduced signal in transmission course because non-linear and produce low intermodulation, improved the index of filter.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a cavity body filter structural representation of the prior art;
Fig. 2 is a cavity body filter structural representation of the present invention;
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Embodiment one, a kind of cavity body filter, as shown in Figure 2, comprise cavity 205, resonant rod 206, described resonant rod 206 is assemblied in the cavity 205, also comprise an elastic cover plate 211 and a tuner 210, described elastic cover plate 211 forms resonant cavity with cavity 205 sealings, described tuner 210 is assemblied in outside the described resonant cavity, apply the power that elastic cover plate 211 is taken place in deformation by described tuner 210, distance between elastic cover plate 211 and the resonant rod 206 is changed, carry out tuning with parameter to filter.
Concrete, tuner 210 described in the embodiment of the invention can be a kind of device that comprises the securing cover plate 204 of tuning screw rod 201 and fixing tuning screw rod, described securing cover plate 204 is provided with screwed hole, described tuning screw rod passes described securing cover plate and described screwed hole threaded engagement, wherein also comprise and matching used nut 202 of tuning screw rod and lock washer 203, so that tuning screw rod is fixed on the securing cover plate.
Like this, tuning screw rod is isolated in outside the resonant cavity, just has only elastic cover plate and cavity wall and resonant rod to form electric capacity in the resonant cavity, changes the structure capacitive of inside cavity by the distance of regulating elastic cover plate and resonant rod.The mode of concrete tuned filter is to push elastic cover plate by the screw-in degree of regulating in the screwed hole of tuning screw rod on securing cover plate, the elastic cover plate stress deformation, distance between elastic cover plate and the resonant rod changes, thereby influence the structure capacitive between them, to reach the purpose of tuned filter parameter.
Described securing cover plate can be a complete sheet material, and sheet material is provided with screwed hole.Can also be the sheet material of hollow out, can be hollow out in the position of no tuning screw rod promptly, can save material like this.The concrete shape of securing cover plate is not construed as limiting the invention.
Elastic cover plate 211 in the embodiment of the invention can be chosen elasticity sheet material preferably, material can be 65Mn, the elastic hardness of 65Mn is all better, the thickness of elastic cover plate makes elastic cover plate generation deformation and can guarantee that elastic cover plate is not easy that deformation takes place voluntarily and is as the criterion with suitable tuner, and concrete thickness is not construed as limiting the invention.Certain described elastic cover plate can be materials such as phosphor bronze or spring steel also, and the material of elastic cover plate is not construed as limiting the invention.
The concrete connected mode of described securing cover plate and elastic cover plate and cavity is that described cavity is provided with screwed hole, with screw securing cover plate and the elastic cover plate mode by threaded engagement is locked on the cavity.
Tuner in the embodiment of the invention can also be other structure, as long as can regulate elastic cover plate.Concrete structure is not construed as limiting the invention.
Embodiment two, a kind of cavity body filter, as shown in Figure 2, comprise cavity 205, resonant rod 206, described resonant rod 206 is assemblied in the cavity 205, also comprise an elastic cover plate 211 and a tuner 210, described elastic cover plate 211 forms resonant cavity with cavity 205 sealings, described tuner 210 is assemblied in outside the described resonant cavity, apply the power that elastic cover plate 211 is taken place in deformation by described tuner 210, distance between elastic cover plate 211 and the resonant rod 206 is changed, carry out tuning with parameter to filter.
Concrete, tuner 210 described in the embodiment of the invention can be a kind of device that comprises the securing cover plate 204 of tuning screw rod 201 and fixing tuning screw rod, described securing cover plate 204 is provided with screwed hole, described tuning screw rod passes described securing cover plate and described screwed hole threaded engagement, wherein also comprise and matching used nut 202 of tuning screw rod and lock washer 203, so that tuning screw rod is fixed on the securing cover plate.
Like this, tuning screw rod is isolated in outside the resonant cavity, just has only elastic cover plate and cavity wall and resonant rod to form electric capacity in the resonant cavity, changes the structure capacitive of inside cavity by the distance of regulating elastic cover plate and resonant rod.The mode of concrete tuned filter is to push elastic cover plate by the screw-in degree of regulating in the screwed hole of tuning screw rod on securing cover plate, the elastic cover plate stress deformation, distance between elastic cover plate and the resonant rod changes, thereby influence the structure capacitive between them, to reach the purpose of tuned filter.
Described securing cover plate can be a complete sheet material, and sheet material is provided with screwed hole.Can also be the sheet material of hollow out, can be hollow out in the position of no tuning screw rod promptly, can save material like this.The concrete shape of securing cover plate is not construed as limiting the invention.
Elastic cover plate 211 in the embodiment of the invention can be chosen elasticity sheet material preferably, material can be 65Mn, the elastic hardness of 65Mn is all better, the thickness of elastic cover plate makes elastic cover plate generation deformation and can guarantee that elastic cover plate is not easy that deformation takes place voluntarily and is as the criterion with suitable tuner, and concrete thickness is not construed as limiting the invention.Certain described elastic cover plate can be materials such as phosphor bronze or spring steel also, and the material of elastic cover plate is not construed as limiting the invention.
Described elastic cover plate and securing cover plate and cavity can be to be fixed together by the mode of welding, adopt welding manner fixed cavity and elastic cover plate and tuner, with respect to screw fixation method, can improve efficiency of assembling greatly, owing to abandoned the existing screw fixed form, material cost reduces greatly, and cavity and cover plate need not a large amount of Screw hole structures, and processing cost further reduces.
Concrete, described elastic cover plate, securing cover plate and cavity adopt laser welding or the welding manner of electric resistance welding is fixed together, can also be other welding manner such as soldering, welding manners such as friction welding (FW), concrete welding manner is not construed as limiting the invention.
Tuner in the embodiment of the invention can also be other structure, as long as can regulate and make its generation deformation to elastic cover plate.Concrete structure is not construed as limiting the invention.
Embodiment three, a kind of communication equipment comprise the arbitrary cavity body filter described in the above embodiment, and described cavity body filter is located at the transceiver circuit part of described communication equipment, is used for signal is selected.
More than three kinds of cavity body filters that embodiment provided of the present invention and communication equipment are described in detail, wherein:
In the embodiment of the invention, elastic cover plate is isolated in tuning screw rod outside the resonant cavity, regulates elastic cover plate by tuner and regulates filter, and the advantage of this kind filter is:
The relative area of elastic cover plate and resonant rod will be far longer than the relative area of tuning screw rod and resonant rod, and also promptly under this pattern, electric capacity enlarges markedly, and tuning sensitivity increases.Therefore, easily tuning, the tuning time shortens greatly, has improved production efficiency.
The RF signal transmits by body surface, therefore, body surface is smooth more, the distributed capacitance that also is cavity inner surface formation is even more, the linearity of signal transmission is just good more, have only elastic cover plate and the formed integral body of cavity wall and resonance bar to form structure capacitive in the resonant cavity of the cavity body filter in the embodiment of the invention, tuning screw rod is isolated in outside the resonant cavity, influence structure capacitive by regulating elastic cover plate, like this with regard to reduced signal in transmission course because non-linear and produce low intermodulation, improved the index of filter.
Used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. cavity body filter, comprise cavity, resonant rod, described resonant rod is assemblied in the cavity, it is characterized in that, also comprise an elastic cover plate and a tuner, the sealing of described elastic cover plate and cavity forms resonant cavity, and described tuner is assemblied in outside the described resonant cavity, applies power to elastic cover plate generation deformation by described tuner, distance between elastic cover plate and the resonant rod is changed, carry out tuning with parameter to filter.
2. cavity body filter as claimed in claim 1, it is characterized in that, described tuner comprises the securing cover plate of tuning screw rod and fixing tuning screw rod, described securing cover plate is provided with screwed hole, described tuning screw rod passes described securing cover plate and described screwed hole threaded engagement, pushes elastic cover plate and makes elastic cover plate distortion by regulating the screw-in degree of tuning screw rod in screwed hole.
3. cavity body filter as claimed in claim 2 is characterized in that, described securing cover plate is the complete sheet material or the sheet material of hollow out.
4. cavity body filter as claimed in claim 3 is characterized in that, the material of elastic cover plate is the 65Mn material.
5. as the described cavity body filter of claim 2 to 4, it is characterized in that described cavity is provided with screwed hole, securing cover plate and the elastic cover plate mode by threaded engagement is locked on the cavity with screw.
6. as the described cavity body filter of claim 2 to 4, it is characterized in that described elastic cover plate, securing cover plate and cavity are fixed together by the mode of welding.
7. cavity body filter as claimed in claim 6 is characterized in that, described elastic cover plate, securing cover plate and cavity adopt the welding manner of laser welding or electric resistance welding to be fixed together.
8. a communication equipment is characterized in that, described communication equipment comprises that described cavity body filter is located at the transceiver circuit part of described communication equipment, is used for signal is selected according to any described cavity body filter of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105275695A CN101976750A (en) | 2010-10-29 | 2010-10-29 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010105275695A CN101976750A (en) | 2010-10-29 | 2010-10-29 | Cavity filter |
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| CN101976750A true CN101976750A (en) | 2011-02-16 |
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| CN2010105275695A Pending CN101976750A (en) | 2010-10-29 | 2010-10-29 | Cavity filter |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324616A (en) * | 2011-07-28 | 2012-01-18 | 西安空间无线电技术研究所 | Super power microwave resonator structure |
| WO2013037172A1 (en) * | 2011-09-16 | 2013-03-21 | 深圳光启高等理工研究院 | Resonant cavity and filter having same |
| CN104126247A (en) * | 2012-02-27 | 2014-10-29 | 株式会社Kmw | Radio frequency filter having cavity structure |
| CN107770942A (en) * | 2017-11-21 | 2018-03-06 | 中国原子能科学研究院 | A kind of tunable accelerating cavity and its tuning instrument |
| WO2018129719A1 (en) * | 2017-01-13 | 2018-07-19 | 华为技术有限公司 | Cavity resonator, filter and communication device |
| CN108616262A (en) * | 2018-06-11 | 2018-10-02 | 宁波华瓷通信技术有限公司 | A kind of filter frequencies tuning structure |
| CN109845028A (en) * | 2016-10-25 | 2019-06-04 | 株式会社Kmw | Radio-frequency filter with cavity structure |
| WO2019200604A1 (en) * | 2018-04-20 | 2019-10-24 | Nokia Shanghai Bell Co., Ltd. | Filter apparatus, method |
| CN112615115A (en) * | 2020-12-14 | 2021-04-06 | 深圳国人科技股份有限公司 | Filtering tuning device |
| CN114256586A (en) * | 2021-11-16 | 2022-03-29 | 中国航空工业集团公司雷华电子技术研究所 | Debugging method of microstrip power divider after laser welding packaging |
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|---|---|---|---|---|
| CN1355946A (en) * | 1999-04-14 | 2002-06-26 | 艾利森电话股份有限公司 | Tuning arrangement |
| CN101764277A (en) * | 2010-03-12 | 2010-06-30 | 深圳市大富科技股份有限公司 | Filter of cavity and resonance tube thereof |
| CN101807737A (en) * | 2010-04-12 | 2010-08-18 | 深圳市大富科技股份有限公司 | Cavity filter, filter cavity and resonating tube assembling method |
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2010
- 2010-10-29 CN CN2010105275695A patent/CN101976750A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1355946A (en) * | 1999-04-14 | 2002-06-26 | 艾利森电话股份有限公司 | Tuning arrangement |
| CN101764277A (en) * | 2010-03-12 | 2010-06-30 | 深圳市大富科技股份有限公司 | Filter of cavity and resonance tube thereof |
| CN101807737A (en) * | 2010-04-12 | 2010-08-18 | 深圳市大富科技股份有限公司 | Cavity filter, filter cavity and resonating tube assembling method |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324616A (en) * | 2011-07-28 | 2012-01-18 | 西安空间无线电技术研究所 | Super power microwave resonator structure |
| WO2013037172A1 (en) * | 2011-09-16 | 2013-03-21 | 深圳光启高等理工研究院 | Resonant cavity and filter having same |
| US10090572B1 (en) | 2012-02-27 | 2018-10-02 | Kmw Inc. | Radio frequency filter having a hollow box with a resonance element disposed therein and a depression with dot peen structures therein |
| US9716301B2 (en) | 2012-02-27 | 2017-07-25 | Kmw Inc. | Radio frequency filter having a hollow box with a wrinkle structure and including a resonance element disposed therein which is short-circuited to the box by a pin |
| CN104126247A (en) * | 2012-02-27 | 2014-10-29 | 株式会社Kmw | Radio frequency filter having cavity structure |
| CN104126247B (en) * | 2012-02-27 | 2016-04-13 | 株式会社Kmw | There is the radio-frequency filter of cavity configuration |
| CN109845028B (en) * | 2016-10-25 | 2023-03-17 | 株式会社Kmw | Radio frequency filter with cavity structure |
| CN109845028A (en) * | 2016-10-25 | 2019-06-04 | 株式会社Kmw | Radio-frequency filter with cavity structure |
| US10998603B2 (en) | 2016-10-25 | 2021-05-04 | Kmw Inc. | Radio frequency filter having cavity structure |
| US10978775B2 (en) | 2017-01-13 | 2021-04-13 | Huawei Technologies Co., Ltd. | Cavity resonator, filter, and communications device |
| WO2018129719A1 (en) * | 2017-01-13 | 2018-07-19 | 华为技术有限公司 | Cavity resonator, filter and communication device |
| CN109314293A (en) * | 2017-01-13 | 2019-02-05 | 华为技术有限公司 | Cavity resonator, filter and communication equipment |
| US20190334222A1 (en) * | 2017-01-13 | 2019-10-31 | Huawei Technologies Co., Ltd. | Cavity resonator, filter, and communications device |
| CN107770942A (en) * | 2017-11-21 | 2018-03-06 | 中国原子能科学研究院 | A kind of tunable accelerating cavity and its tuning instrument |
| WO2019200604A1 (en) * | 2018-04-20 | 2019-10-24 | Nokia Shanghai Bell Co., Ltd. | Filter apparatus, method |
| CN108616262A (en) * | 2018-06-11 | 2018-10-02 | 宁波华瓷通信技术有限公司 | A kind of filter frequencies tuning structure |
| CN112615115A (en) * | 2020-12-14 | 2021-04-06 | 深圳国人科技股份有限公司 | Filtering tuning device |
| CN114256586A (en) * | 2021-11-16 | 2022-03-29 | 中国航空工业集团公司雷华电子技术研究所 | Debugging method of microstrip power divider after laser welding packaging |
| CN114256586B (en) * | 2021-11-16 | 2023-03-14 | 中国航空工业集团公司雷华电子技术研究所 | Debugging method of microstrip power divider after laser welding packaging |
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Address after: 518104, Guangdong, Shenzhen province Baoan District manhole Street oyster road manhole Industrial Company Third Industrial Zone A1, A2, A3 101 and 2 layers, A4 Applicant after: Shenzhen Tat Fook Technology Co., Ltd. Address before: 518108 Bao'an District, Shenzhen City, Guangdong Province, Shiyan Town, love group with the rich industrial area A \ B Dong Applicant before: Shenzhen Tat Fook Technology Co., Ltd. |
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Application publication date: 20110216 |