CN202259614U - Cavity filter and communication apparatus - Google Patents
Cavity filter and communication apparatus Download PDFInfo
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- CN202259614U CN202259614U CN2010205860088U CN201020586008U CN202259614U CN 202259614 U CN202259614 U CN 202259614U CN 2010205860088 U CN2010205860088 U CN 2010205860088U CN 201020586008 U CN201020586008 U CN 201020586008U CN 202259614 U CN202259614 U CN 202259614U
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- cover plate
- cavity
- elastic cover
- resonant
- body filter
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Abstract
The utility model discloses a cavity filter and a communication apparatus including the cavity filter. In the embodiment provided in the utility model, the cavity filter includes a cavity, a resonant rod, an elastic cover plate and a tuning device. The elastic cover plate and the cavity are enclosed to form a resonant cavity; the tuning device is arranged out of the resonant cavity; and the tuning device exerts a force to enable the elastic cover to be deformed, the distance between the elastic cover plate and the resonant rod is changed, and the purpose of turning the filter parameter is realized. In the embodiment provided in the utility model, the cavity filter is easy to tune, and a radio frequency index can be raised.
Description
Technical field
The utility model relates to the wave filter technology field, is specifically related to the tuned cell of a kind of cavity body filter, cavity body filter and comprises the communication equipment of this 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 RF indexes through debugging.In the prior art, be through 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 through regulating these adjustment screw, thereby reaches the purpose of debugging radio frequency signal index.Traditional filter construction is as shown in Figure 1, comprises 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 through the screwed hole on the cover plate; Form structure capacitive with resonant rod 106, regulate filter through the depth of regulating tuning screw rod 101 screw-in cover plates.
In research and practice process to prior art, the inventor of the utility model discovery,
A. filter tuner mode of the prior art is to come tuned frequency to reach tuning purpose through the depth of regulating tuning screw rod entering resonant rod.But under this kind pattern, the structure capacitive that forms between the tuning screw rod resonant bar is very little, and debug time is very long like this.
B. after debugging was accomplished, tuning screw rod will be deep in the resonant cavity.And radiofrequency signal is transmitted 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.
The utility model content
The utility model embodiment 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 utility model embodiment provides a kind of cavity body filter, comprises cavity; Resonant rod, said resonant rod is assemblied in the cavity, comprises an elastic cover plate; Said elastic cover plate and cavity sealing form resonant cavity, comprise that also makes a said elastic cover plate generation deformation, to change the distance between said elastic cover plate and the said resonant rod; Parameter to filter is carried out tuning tuner, and said tuner is assemblied in outside the said resonant cavity.
The utility model embodiment 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 utility model embodiment 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 resonant bar, and also promptly under this pattern, electric capacity enlarges markedly, and tuning sensitivity increases.Therefore, easy tuning, the tuning time shortens greatly, has improved production efficiency.
B. radiofrequency signal is transmitted through body surface; Therefore, body surface is smooth more, also is that the distributed capacitance of cavity inner surface formation is even more; The linearity of signal transmission is just good more; Have only the formed whole resonant bar of elastic cover plate and cavity wall to form structure capacitive in the resonant cavity of the cavity body filter among the utility model embodiment, tuning screw rod is isolated in outside the resonant cavity, influences structure capacitive through 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 among the utility model embodiment; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, 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 the cavity body filter structural representation of the utility model;
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one, a kind of cavity body filter, as shown in Figure 2, comprise cavity 205; Resonant rod 206; Said resonant rod 206 is assemblied in the cavity 205, comprises an elastic cover plate 211, and said elastic cover plate 211 forms resonant cavity with cavity 205 sealings; Comprise that also one makes said elastic cover plate 211 that deformation take place; To change the distance between said elastic cover plate 211 and the said resonant rod 206, the parameter of filter is carried out tuning tuner 210, said tuner 210 is assemblied in outside the said resonant cavity.
Concrete; Tuner 210 described in the utility model embodiment can be a kind of device that comprises the tuning screw rod 201 and the securing cover plate 204 of fixing tuning screw rod; Said securing cover plate 204 is provided with screwed hole; Said tuning screw rod passes said securing cover plate and said screwed hole threaded engagement, wherein also comprises and matching used nut 202 of tuning screw rod and lock washer 203, to be fixed on tuning screw rod 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 through the distance of regulating elastic cover plate and resonant rod.The mode of concrete tuned filter is to push elastic cover plate through 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.
Said 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.
The concrete connected mode of said securing cover plate and elastic cover plate and cavity is that said cavity is provided with screwed hole, with screw securing cover plate and the elastic cover plate mode through threaded engagement is locked on the cavity.
Tuner among the utility model embodiment 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; Said resonant rod 206 is assemblied in the cavity 205, comprises an elastic cover plate 211, and said elastic cover plate 211 forms resonant cavity with cavity 205 sealings; Comprise that also one makes said elastic cover plate 211 that deformation take place; To change the distance between said elastic cover plate 211 and the said resonant rod 206, the parameter of filter is carried out tuning tuner 210, said tuner 210 is assemblied in outside the said resonant cavity.
Concrete; Tuner 210 described in the utility model embodiment can be a kind of device that comprises the tuning screw rod 201 and the securing cover plate 204 of fixing tuning screw rod; Said securing cover plate 204 is provided with screwed hole; Said tuning screw rod passes said securing cover plate and said screwed hole threaded engagement, wherein also comprises and matching used nut 202 of tuning screw rod and lock washer 203, to be fixed on tuning screw rod 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 through the distance of regulating elastic cover plate and resonant rod.The mode of concrete tuned filter is to push elastic cover plate through 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.
Said 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.
Said elastic cover plate and securing cover plate and cavity can be to be fixed together through the mode of welding; Adopt welding manner fixed cavity and elastic cover plate and tuner,, can improve efficiency of assembling greatly with respect to screw fixation method; 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; Said 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 among the utility model embodiment 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 said cavity body filter is located at the transceiver circuit part of said communication equipment, is used for signal is selected.
More than to three kinds of cavity body filters that embodiment provided of the utility model and use the communication equipment of this cavity body filter to carry out detailed introduction, wherein:
Among the utility model embodiment, elastic cover plate is isolated in tuning screw rod outside the resonant cavity, regulates elastic cover plate through 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 resonant bar, and also promptly under this pattern, electric capacity enlarges markedly, and tuning sensitivity increases.Therefore, easy tuning, the tuning time shortens greatly, has improved production efficiency.
Radiofrequency signal is transmitted through body surface; Therefore, body surface is smooth more, also is that the distributed capacitance of cavity inner surface formation is even more; The linearity of signal transmission is just good more; Have only the formed whole resonant bar of elastic cover plate and cavity wall to form structure capacitive in the resonant cavity of the cavity body filter among the utility model embodiment, tuning screw rod is isolated in outside the resonant cavity, influences structure capacitive through 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.The communication equipment of the cavity body filter that above-mentioned advantage is equally applicable to comprise that the utility model provides.
Used concrete example among this paper the principle and the execution mode of the utility model are set forth, the explanation of above embodiment just is used to help to understand the method and the core concept thereof of the utility model; Simultaneously, for one of ordinary skill in the art, according to the thought of the utility model, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. a cavity body filter comprises cavity, resonant rod; Said resonant rod is assemblied in the cavity, it is characterized in that, comprises an elastic cover plate; Said elastic cover plate and cavity sealing form resonant cavity, comprise that also makes a said elastic cover plate generation deformation, to change the distance between said elastic cover plate and the said resonant rod; Parameter to filter is carried out tuning tuner, and said tuner is assemblied in outside the said resonant cavity.
2. cavity body filter as claimed in claim 1; It is characterized in that; Said tuner comprises the securing cover plate of tuning screw rod and fixing tuning screw rod, and said securing cover plate is provided with screwed hole, and said tuning screw rod passes said securing cover plate and said screwed hole threaded engagement.
3. cavity body filter as claimed in claim 2 is characterized in that, said 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. like any described cavity body filter of claim 2 to 4, it is characterized in that said cavity is provided with screwed hole, securing cover plate and the elastic cover plate mode through threaded engagement is locked on the cavity with screw.
6. like any described cavity body filter of claim 2 to 4, it is characterized in that said elastic cover plate, securing cover plate and cavity are fixed together through the mode of welding.
7. cavity body filter as claimed in claim 6 is characterized in that, said 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, said communication equipment comprises that said cavity body filter is located at the transceiver circuit part of said 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 |
|---|---|---|---|
| CN2010205860088U CN202259614U (en) | 2010-10-29 | 2010-10-29 | Cavity filter and communication apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205860088U CN202259614U (en) | 2010-10-29 | 2010-10-29 | Cavity filter and communication apparatus |
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| Publication Number | Publication Date |
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| CN202259614U true CN202259614U (en) | 2012-05-30 |
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| CN2010205860088U Expired - Lifetime CN202259614U (en) | 2010-10-29 | 2010-10-29 | Cavity filter and communication apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107112615A (en) * | 2014-12-31 | 2017-08-29 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer, signal receiving/transmission device, radio frequency remote equipment and tower amplifier |
| CN108631027A (en) * | 2017-03-17 | 2018-10-09 | Ace技术株式会社 | Utilize the RF cavity body filters and its manufacturing method of elastomer |
| WO2019178870A1 (en) * | 2018-03-23 | 2019-09-26 | 深圳市大富科技股份有限公司 | Filter and communication device |
| JP2019531664A (en) * | 2016-10-25 | 2019-10-31 | ケーエムダブリュ・インコーポレーテッド | Radio frequency filter with cavity structure |
-
2010
- 2010-10-29 CN CN2010205860088U patent/CN202259614U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107112615A (en) * | 2014-12-31 | 2017-08-29 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer, signal receiving/transmission device, radio frequency remote equipment and tower amplifier |
| JP2019531664A (en) * | 2016-10-25 | 2019-10-31 | ケーエムダブリュ・インコーポレーテッド | Radio frequency filter with cavity structure |
| US10998603B2 (en) | 2016-10-25 | 2021-05-04 | Kmw Inc. | Radio frequency filter having cavity structure |
| CN108631027A (en) * | 2017-03-17 | 2018-10-09 | Ace技术株式会社 | Utilize the RF cavity body filters and its manufacturing method of elastomer |
| WO2019178870A1 (en) * | 2018-03-23 | 2019-09-26 | 深圳市大富科技股份有限公司 | Filter and communication device |
| CN110770970A (en) * | 2018-03-23 | 2020-02-07 | 深圳市大富科技股份有限公司 | Filter and communication equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |