CN102544658A - Cavity filter and cross-coupling structure of cavity filter - Google Patents
Cavity filter and cross-coupling structure of cavity filter Download PDFInfo
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- CN102544658A CN102544658A CN2012100048853A CN201210004885A CN102544658A CN 102544658 A CN102544658 A CN 102544658A CN 2012100048853 A CN2012100048853 A CN 2012100048853A CN 201210004885 A CN201210004885 A CN 201210004885A CN 102544658 A CN102544658 A CN 102544658A
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Abstract
The invention discloses a cavity filter, which comprises a cavity and a cover plate for covering the cavity, wherein a plurality of resonant cavities which are partitioned by dividing walls are formed in the cavity; a cross-coupling structural piece is arranged between at least two resonant cavities which are not adjacent; and a tuning screw is arranged on the cover plate, passes through the cover plate and is inserted between the cross-coupling structural pieces and a resonant rod. By the cavity filter and a cross-coupling structure of the cavity filter, out-of-band clutter can be inhibited well, the production efficiency is improved greatly, and the production cost is reduced.
Description
Technical field
The present invention relates to the communications field, be specifically related to the cross coupling structure and the base station of a kind of cavity body filter and 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 that communication system completion signal transmits and receives, cavity body filter is used to select signal of communication, clutter or interference signal that the filtering communication signal frequency is outer.
A plurality of resonant cavitys are arranged in the cavity body filter, as shown in Figure 1, be employed in two non-conterminous resonant cavitys usually and cross coupling structure for example be set between 111 and 113 the outer clutter of filter passband is with outer the inhibition.In traditional cavity body filter, between two non-conterminous resonant cavitys, be provided with one and fly bar 120 and realize cross-couplings.
In research and practice process to prior art; Inventor of the present invention finds that along with the employed broadband of communications industry more and more narrow, the index of product is also more and more harsher; Utilization flies the cross-couplings mode that bar is realized; Need modification repeatedly to fly the length that bar of bar and fly the height of bar in cavity to optimize index, the length that when optimization flies bar, should consider to fly bar considers to fly the height of bar again, has just produced a plurality of variablees during the optimization; This has just determined optimization to need a lot of times also to increase the optimization difficulty simultaneously, is unfavorable for the batch process of product.
Summary of the invention
In order to solve the deficiency of cross-couplings mode in the prior art, the invention provides a kind of cavity body filter.
The invention provides a kind of cavity body filter; Comprise cavity; The cover plate of the said cavity of capping has a plurality of resonant cavitys that separated by dividing wall in the cavity, be provided with cross coupling structure between non-conterminous two resonant cavitys; Said cross coupling structure comprises the tuning screw rod of cross coupling structure spare of being located at the cross coupling structure spare between said two resonant cavitys and being used for tuning said cross coupling structure spare, and the tuning screw rod of said cross coupling structure spare is arranged on the said cover plate.
Said cover plate is provided with screwed hole; The tuning screw rod of said cross coupling structure spare is provided with screw thread; The tuning screw rod of said cross coupling structure spare passes said screwed hole and stretches in the said cavity, is locked at the tuning screw rod of said cross coupling structure spare on the said cover plate with nut.
The tuning screw rod of said cross coupling structure spare is located between the resonant rod in said cross coupling structure spare and the resonant cavity.
Said cross coupling structure spare comprises the coupling disc at a body of rod and body of rod two ends, and the said body of rod is fixed in the cross coupling structure spare groove on the dividing wall between said two resonant cavitys, and the resonant rod in said coupling disc and the said resonant cavity is relative.
Said cross coupling structure spare is the conducting metal bar that two ends link to each other with the cavity or the cover plate of said two resonant cavitys respectively, and said metallic rod is passed the cross coupling structure spare groove on the dividing wall between said two resonant cavitys.
The above cavity body filter is duplexer, mixer or tower amplifier.
A kind of cross coupling structure of cavity body filter; Said cross coupling structure comprises is located at two cross coupling structure spares between the non-conterminous resonant cavity, and is located at the tuning screw rod of the cross coupling structure spare that is used for tuning said cross coupling structure spare on the cavity filter cover board of the said resonant cavity of capping.
Said cavity filter cover board is provided with screwed hole; The tuning screw rod of said cross coupling structure spare is provided with screw thread; The tuning screw rod of said cross coupling structure spare passes said screwed hole and stretches in the said resonant cavity, is locked at the tuning screw rod of said cross coupling structure spare on the said cavity filter cover board with nut.
The tuning screw rod of said cross coupling structure spare is located between the resonant rod in said cross coupling structure spare and the resonant cavity.
The cavity body filter that the invention provides and the cross coupling structure of cavity body filter increase tuning screw rod for cross coupling structure spare, get into the degree of depth in the cavity through regulating tuning screw rod; Promptly change the distance of tuning screw rod and cross coupling structure spare; Regulate formed electric field between cross coupling structure spare and the resonant cavity, thereby to being with outer clutter to carry out good restraining, with respect to optimizing cross coupling structure spare in the prior art repeatedly; Be easy to touch the mark; And simple, can greatly enhance productivity, reduce production costs.
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; Obviously, the 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 the sketch map of cross coupling structure in the cavity body filter in the prior art;
Fig. 2 is the cross coupling structure sketch map in the cavity body filter in the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, 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 are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment one,
A kind of cavity body filter, of Fig. 2, comprise cavity 210; The cover plate of the said cavity of capping, not shown, a plurality of resonant cavitys that separated by dividing wall are arranged in the cavity 210; The cavity resonator structure that a kind of cavity has been shown among the figure comprises resonant cavity 211,212,213; 214; Be provided with cross coupling structure 220 between at least two non-conterminous resonant cavitys, non-conterminous two resonant cavitys are appreciated that to signal can not directly transmit between these two resonant cavitys, resonant cavity 211 and resonant cavity 213 in for example scheming; Cross coupling structure comprises is located at two cross coupling structure spare 221 and tuning screw rods 222 that are used for tuning cross coupling structure spare 221 between the non-conterminous resonant cavity, and tuning screw rod 222 is arranged on the cover plate.
Cavity filter cover board is provided with screwed hole; Tuning screw rod is provided with screw thread; Tuning screw rod passes the screwed hole on the cover plate and stretches in the cavity, with nut 2221 the tuning screw rod locking of said cross coupling structure spare on the cover board, also is provided with packing ring 2222 between nut and the cover plate.Can produce electric field between the resonant rod 231 in cross coupling structure spare and the resonant cavity; Tuning screw rod 222 preferably is located between cross coupling structure spare 221 and the resonant rod 231; Tuning like this screw rod can produce magnetic field near cross coupling structure spare and resonant rod, get into the degree of depth in the cavity through regulating tuning screw rod, promptly changes the distance of tuning screw rod of cross coupling structure spare and cross coupling structure spare; Regulate formed electric field between cross coupling structure spare and the resonant cavity; Thereby to being with outer clutter to suppress, certainly, can squint between cross coupling structure spare resonant bar to some extent in the position of tuning screw rod; Set according to specific targets, be not construed as limiting the invention.Cross coupling structure has increased the tuning screw rod of regulating cross coupling structure spare, with respect to optimizing cross coupling structure spare in the prior art repeatedly, is easy to touch the mark, and simple, can greatly enhance productivity, reduce production costs.Only show the instance that increases a tuning screw rod among the figure, can tuning screw rod all be set in the both sides of cross coupling structure spare, Yi Bian can certainly a plurality of tuning screw rods be set, the number of the tuning screw rod of cross coupling structure spare is not construed as limiting the invention.
Cross coupling structure spare in the embodiment of the invention can be a kind of capacitive cross coupling structure spare; The coupling disc that comprises a body of rod and body of rod two ends, the body of rod are fixed in the cross coupling structure spare groove, and cross coupling structure spare groove is on the dividing wall between two resonant cavitys; Two coupling discs lay respectively in two resonant cavitys; And relative with the resonant rod in the resonant cavity separately, produced electric field between coupling disc and the resonant rod, form capacitive couplings.
Cross coupling structure spare of the present invention can also be perceptual cross coupling structure spare, is the conducting metal bar that two ends link to each other with the cavity of two resonant cavitys respectively, and metallic rod is passed two cross coupling structure spare grooves on the dividing wall between the resonant cavity.
Cross coupling structure spare of the present invention can be for flying bar.
Cross coupling structure spare in the embodiment of the invention is not limited to above two kinds of structures mentioning, can also all not be construed as limiting the invention for the cross coupling structure spare of other forms and structure.
Also be provided with the tuning screw rod of other types in the embodiment of the invention on the cover plate of cavity body filter, like the tuning screw rod 232 of tuned resonance bar and the coupling screw rod 233 between two adjacent resonators.
Cavity body filter in the embodiment of the invention can be duplexer, mixer or tower amplifier.
Embodiment two,
A kind of cross coupling structure of cavity body filter; Cross coupling structure comprises is located at two cross coupling structure spares between the non-conterminous resonant cavity; And be located at the tuning screw rod that is used for tuning said cross coupling structure spare on the cavity filter cover board, cavity filter cover board is used for the capping resonant cavity.
Non-conterminous two resonant cavitys are appreciated that to signal and can not be between these two resonant cavitys directly transmit; Cross coupling structure comprises is located at two cross coupling structure spare and tuning screw rods that are used for tuning cross coupling structure spare between the non-conterminous resonant cavity, and tuning screw rod is arranged on the cover plate.
Cavity filter cover board is provided with screwed hole, and tuning screw rod is provided with screw thread, and tuning screw rod passes the screwed hole on the cover plate and stretches in the cavity, with nut said tuning screw rod locking on the cover board.Can produce electric field between the resonant rod in cross coupling structure spare and the resonant cavity, tuning screw rod preferably is located between cross coupling structure spare and the resonant rod, and tuning like this screw rod can produce magnetic field near cross coupling structure spare and resonant rod; Get into the degree of depth in the cavity through regulating tuning screw rod; Promptly change the distance of tuning screw rod and cross coupling structure spare, regulate formed electric field between cross coupling structure spare and the resonant cavity, thereby to being with outer clutter to suppress; Certainly; Can squint between cross coupling structure spare resonant bar to some extent in the position of tuning screw rod, set according to specific targets, is not construed as limiting the invention.Cross coupling structure has increased the tuning screw rod of regulating cross coupling structure spare, with respect to optimizing cross coupling structure spare in the prior art repeatedly, is easy to touch the mark, and simple, can greatly enhance productivity, reduce production costs.Only show the instance that increases a tuning screw rod among the figure, can tuning screw rod all be set in the both sides of cross coupling structure spare, Yi Bian can certainly a plurality of tuning screw rods be set, the number of tuning screw rod is not construed as limiting the invention.
Cross coupling structure spare in the embodiment of the invention can be a kind of capacitive cross coupling structure spare; The coupling disc that comprises a body of rod and body of rod two ends, the body of rod are fixed in the cross coupling structure spare groove, and cross coupling structure spare groove is on the dividing wall between two resonant cavitys; Two coupling discs lay respectively in two resonant cavitys; And relative with the resonant rod in the resonant cavity separately, produced electric field between coupling disc and the resonant rod, form capacitive couplings.
Cross coupling structure spare of the present invention can also be perceptual cross coupling structure spare, is the conducting metal bar that two ends link to each other with the cavity of two resonant cavitys respectively, and metallic rod is passed two cross coupling structure spare grooves on the dividing wall between the resonant cavity.
Cross coupling structure spare of the present invention can be for flying bar.
Cross coupling structure spare in the embodiment of the invention is not limited to above two kinds of structures mentioning, can also all not be construed as limiting the invention for the cross coupling structure spare of other forms and structure.
Cavity body filter in the embodiment of the invention can be duplexer, mixer or tower amplifier.
More than cavity body filter and cavity body filter cross coupling structure that the embodiment of the invention provided have been carried out detailed introduction, wherein:
The cavity body filter that the invention provides and the cross coupling structure of cavity body filter increase tuning screw rod for cross coupling structure spare, get into the degree of depth in the cavity through regulating tuning screw rod; Promptly change the distance of tuning screw rod and cross coupling structure spare; Regulate formed electric field between cross coupling structure spare and the resonant cavity, thereby to being with outer clutter to carry out good restraining, with respect to optimizing cross coupling structure spare in the prior art repeatedly; Be easy to touch the mark; And simple, can greatly enhance productivity, reduce production costs.
Used concrete example among this paper 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 on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (9)
1. a cavity body filter is characterized in that, comprises cavity; The cover plate of the said cavity of capping; A plurality of resonant cavitys that separated by dividing wall are arranged in the cavity, be provided with cross coupling structure spare between at least two non-conterminous resonant cavitys, tuning screw rod also is set on the cover plate; Said tuning screw rod wears said cover plate, and is inserted between the said cross coupling structure spare resonant bar.
2. cavity body filter according to claim 1; It is characterized in that said cover plate is provided with screwed hole, said tuning screw rod is provided with screw thread; Said tuning screw rod passes said screwed hole and stretches in the said cavity, is locked at said tuning screw rod on the said cover plate with nut.
3. cavity body filter according to claim 2 is characterized in that, said tuning screw rod is located between the resonant rod in said cross coupling structure spare and the resonant cavity.
4. according to any described cavity body filter of claim 1～3; It is characterized in that; Said cross coupling structure spare comprises the coupling disc at a body of rod and body of rod two ends; The said body of rod is fixed in the cross coupling structure spare groove on the dividing wall between said two resonant cavitys, and the resonant rod in said coupling disc and the said resonant cavity is relative.
5. according to any described cavity body filter of claim 1～3; It is characterized in that; Said cross coupling structure spare is the conducting metal bar that two ends link to each other with the cavity or the cover plate of said two resonant cavitys respectively, and said metallic rod is passed the cross coupling structure spare groove on the dividing wall between said two resonant cavitys.
6. according to any described cavity body filter of claim 1～3, it is characterized in that said cavity body filter is duplexer, mixer or tower amplifier.
7. the cross coupling structure of a cavity body filter; It is characterized in that; Said cross coupling structure comprises is located at two cross coupling structure spares between the non-conterminous resonant cavity, and is located at the tuning screw rod that is used for tuning said cross coupling structure spare on the cavity filter cover board of the said resonant cavity of capping.
8. the cross coupling structure of cavity body filter according to claim 7; It is characterized in that; Said cavity filter cover board is provided with screwed hole; Said tuning screw rod is provided with screw thread, and said tuning screw rod passes said screwed hole and stretches in the said resonant cavity, is locked at said tuning screw rod on the said cavity filter cover board with nut.
9. the cross coupling structure of cavity body filter according to claim 8 is characterized in that, said tuning screw rod is located between the resonant rod in said cross coupling structure spare and the resonant cavity.
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| CN2012100048853A CN102544658A (en) | 2012-01-10 | 2012-01-10 | Cavity filter and cross-coupling structure of cavity filter |
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| CN2012100048853A CN102544658A (en) | 2012-01-10 | 2012-01-10 | Cavity filter and cross-coupling structure of cavity filter |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099285A (en) * | 2016-07-29 | 2016-11-09 | 四川天邑康和通信股份有限公司 | A kind of WLAN combiner and path combining method thereof and coupling window design method |
| CN106129550A (en) * | 2016-08-18 | 2016-11-16 | 武汉凡谷陶瓷材料有限公司 | Local medium loaded medium waveguide filter |
| WO2017088174A1 (en) * | 2015-11-27 | 2017-06-01 | 华为技术有限公司 | Dielectric filter, transceiver and base station |
| CN107615577A (en) * | 2015-12-30 | 2018-01-19 | 深圳市大富科技股份有限公司 | Resonance bar assembly, cavity body filter and the communication equipment including the cavity body filter |
| CN108232386A (en) * | 2018-03-05 | 2018-06-29 | 湖北大学 | A kind of cavity body filter of cross coupling structure |
| CN113036353A (en) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | Filter and communication equipment |
| CN113922024A (en) * | 2020-07-09 | 2022-01-11 | 大富科技(安徽)股份有限公司 | Filter and communication equipment |
| CN113964465A (en) * | 2021-10-15 | 2022-01-21 | 北京微纳星空科技有限公司 | Adjustable inductive cross coupling structure of cavity filter |
| CN115663434A (en) * | 2022-12-29 | 2023-01-31 | 成都联帮微波通信工程有限公司 | Structure of filter |
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| CN108232386A (en) * | 2018-03-05 | 2018-06-29 | 湖北大学 | A kind of cavity body filter of cross coupling structure |
| CN113036353A (en) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | Filter and communication equipment |
| CN113922024A (en) * | 2020-07-09 | 2022-01-11 | 大富科技(安徽)股份有限公司 | Filter and communication equipment |
| CN113964465A (en) * | 2021-10-15 | 2022-01-21 | 北京微纳星空科技有限公司 | Adjustable inductive cross coupling structure of cavity filter |
| CN115663434A (en) * | 2022-12-29 | 2023-01-31 | 成都联帮微波通信工程有限公司 | Structure of filter |
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Application publication date: 20120704 |