Cavity filter and filter cavity

The technical field of

[0001] this utility model claims a cavity filter and band-pass cavity filter.

Background technology

0002 ] filter [ as a frequency selecting device which can be widely applied in communication field especially a radio frequency communication field. The communication system to finish the signal transmitting and receiving the base station in filter is used for selecting communication signal filtering the communication signal frequency the noise wave interference signal or.

[0003] the mobile communication base station system in common use cavity filter the antenna transmitting and receiving the signal to frequency selection. Cavity filter comprises cavity body and cover plate because the filter is used for all kinds of complex environment and big lower part further comprises lightning coupling plate.

[0004] several under the condition of filter it is used to the two or more independent pcb plate is coupled with the lightning-proof. I picture which is displayed in existing technology in the cavity filter sketch map comprising i the cavity body a pcb plate 2 and the second printed circuit board pcb plate 3 two pcb boards the connecting way between from each of the isolated cover board on the upper surface of the opening of the cable 4 the cover plate is realized through two pcb boards the connection between the.

[0005] as soon as possible in order to reduce the isolation cover plate the open hole on the back and forth to an adhesive point to realize two pcb between the signal the mutual interference. Because the cover plate on the surface of the space is full of the common isolation cover plate and the waterproof cover plate is reserved between 7-8mm the height of the cable is put in the cover board the upper surface and easy to shake so that the designer can on the cover board is added line card to realize the location of the cable.

[0006] in the existing technology the research and practice in the process of this utility model has the inventor found that: Of the traditional filter in the cable the cover plate of the upper side of opening hole passes through so as to realize two pcb boards is set between the signal is connected with the two pcb boards the space between the communication signal the crosstalk caused some radio frequency index need to repeatedly debugging and it cannot ensure performance index the stability of; Though an adhesive point of the opening hole can be reduced as much as possible so as to realize two pcb boards is set between the signal the mutual interference it increases the technics complexity and manpower and material cost and second repairing glue the efficiency is not high the cable fixing dead; Is to resolve problem of cable is put in the cover board on the upper surface of the space caused by shake this utility model solves the problem of the cover board is added on the line card so as to realize the location of the cable it increases the line card the producing cost and it also increases the process of the complexity of.

Utility model claims a content

[0007] this utility model is to solve the problem of present technology two pcb in the space between the communication signal the mutual crosstalk the defect of the invention claims a cavity filter and band-pass cavity filter.

[0008] in order to realize the utility model this utility model adopts following technical plan:

[0009] a cavity filter comprises cavity body and cover plate of said cavity body comprises cavity the side wall of isolation rib and it is composed of the said isolating rib separated by more than two separating cavity of said separating cavity is set between the cable is connected with said cable is set in the cavity side wall and/or the said isolating rib is the line in the groove of said cover plate seals said separating cavity.

[0010] said cable and said wiring groove interference match with each other.

[0011] said cover board includes the tuning cover board and isolation cover board and said tuning cover board covers the outside of the separating cavity of said cavity body and the other part is pressed tightly and the wiring slot cable;

[0012] said isolation cover plate is set on said tuned on the cover plate and sealing said separating cavity the said isolating cavities are separated from each other.

[0013] said separating cavity are two which are respectively set on pcb board the pcb board and wire connection.

[0014] said pcb board is pcb plate is coupled with the lightning-proof.

[0015] the invention claims a filter cavity body comprises cavity the side wall of the separating bar and is used for transmitting signal cable said cable is located on the side wall of said cavity body and /or the said isolating rib is the line groove.

0016 ] filter [ cavity body further comprises the said isolating rib separated by more than two separating cavity of said separating cavity is set between the cable connection.

[0017] said cable and said wiring groove interference match with each other.

[0018] said band-pass cavity filter tuning cover the upper part of the cover board and said tuning cover board covers the outside of the separating cavity of said cavity body and the other part is pressed tightly and the wiring slot cable; Said isolation cover plate is set on said tuned on the cover plate and sealing said separating cavity.

[0019] said separating cavity are two which are respectively set on pcb board the pcb board and wire connection.

[0020] this utility model claims a cavity filter corresponding to said present technology in the cavity body is increased in cable wiring groove is used for adjusting the cover board seals the cavity filter and the rest part of the pcb board space is separated out and in each independent pcb board space on the upper surface of the cover plate is isolation cover; Effectively realize the pcb board the space between the relative distance so as to realize the space between two signal corresponding to the separated it ensures the cavity filter radio frequency modulation performance index of high stability.

Specification attached drawing

[0021] in order to clearly the invention this utility model in the embodiment of the technology plan of the lower part of the embodiment describes the need to use of the attached drawing is simple to be introduced.

[0022] image i is in existing technology a cavity filter main view;

[0023] figure 2 this utility model one embodiment a cavity filter sectional view;

[0024] picture 3 is the utility new embodiment one a cavity filter main view;

[0025] picture 4 is the utility new embodiment one a cavity filter is set with reinforcing rib picture.

Specific implementing manner

[0026] a lower surface of the combination of this utility model claims an embodiment of the attached drawing of this utility model in the embodiment of the technology plan of the whole floor clearly describe the natural the described embodiments of just this utility model is the partial embodiment and it is not completely example of the. Based on the utility model is an embodiment of the field of common technical personnel in the case of no is creatively working under the premise of the obtained by the other embodiments are both belongs to the utility model protects the range of.

[0027] one embodiment of this invention claims a cavity filter as picture 2 1 and picture 3 represented comprises cavity 5 and cover board of said cavity body comprises cavity 5 6 the side wall of isolation rib without mark and it is composed of the said isolating rib separated by more than two separating cavity of said separating cavity is set between the wire 8 is connected to separating cavity between the signal transmission of said cable is set in the cavity side wall and/or the said isolating rib on the wiring groove 9 in the cover board seals the said separating cavity.

[0028] because said separating cavity is set on the said cavity body the inner part of the residual space of the area so it needs according to said separating cavity of the actual distributed position of the walking line of the groove is set with.

[0029] one embodiment of the said wiring groove is set on the side wall of said cavity body 6 on the picture 3 represented said two separated cavity and is tightly close to the side wall of said cavity body according to practical situation between the two of said cavity body is set on side wall of the wiring groove the said cable set in said wiring groove.

[0030] the second embodiment the said wiring groove is set on the said isolating rib is according to practical situation between the two of the said isolating rib is set on the wiring groove the said cable set in said wiring groove.

[0031] the three kinds of implementation modes the said wiring groove is set in the cavity side wall 6 and the said isolating rib is according to practical situation between the two with the shortest distance of said cavity body side wall and the said isolating rib is set on the wiring groove the said cable set in said wiring groove.

[0032] said cable and said wiring groove interference match with each other the said wiring groove the diameter of the base and the said cable the same as the diameter of said cable embedded into said wiring groove of said cable the space according to said wiring groove the space.

[0033] in order to reinforce the said isolating rib the intensity of the drawing 4 the display can be used in which is set with strengthening rib 13.

[0034] said cover board includes the tuning cover board 10 and isolation cover plate 11 and said tuning cover board for sealing the whole chamber area of the separating cavity area to the outside of the other part of the pressed tightly and the wiring slot cable the cable sealing said wiring groove and said cover board are formed into the pore canal of the signal so as to reach the complete isolation of;

[0035] the said isolated cavity and said cavity body and the other part is separated after tuning on said cover board is set on the isolation cover board said isolation cover plate is used to seal said separating cavity so as to realize separating cavity between the distant from each other so as to achieve the purpose of signal completely separated.

[0036] preferably said separating cavity is two which are respectively set on pcb plate 12 of the pcb board and wire connection.

[0037] preferably the pcb board is pcb plate is coupled with the lightning-proof.

[0038] this utility model claims a cavity filter compared with existing technology in the cavity body is increased in cable wiring groove is used for adjusting the cover board seals the cavity filter and the rest part of the pcb board space is separated out and in each independent pcb board space on the upper surface of the cover plate is isolation cover; Effectively realize the pcb board the space between the relative distance so as to realize the space between two signal corresponding to the separated it ensures the cavity filter radio frequency modulation performance index the stability of.

[0039] second embodiment the invention claims a band-pass cavity filter comprises cavity the side wall of the separating bar and is used for transmitting signal cable said cable is located on the side wall of said cavity body and /or the said isolating rib is the line groove.

[0040] because said separating cavity is set on the said cavity body the inner part of the residual space of the area so it needs according to said separating cavity of the actual distributed position of the walking line of the groove is set with.

[0041] one embodiment of the said wiring groove is set in said cavity body on the side wall of said two separated cavity and is tightly close to the side wall of said cavity body according to practical situation between the two of said cavity body is set on side wall of the wiring groove the said cable set in said wiring groove.

[0042] the second embodiment the said wiring groove is set on the said isolating rib is according to practical situation between the two of the said isolating rib is set on the wiring groove the said cable set in said wiring groove.

[0043] the three kinds of implementation modes the said wiring groove is set on the side wall of said cavity body and the said isolating rib is according to practical situation between the two with the shortest distance of said cavity body side wall and the said isolating rib is set on the wiring groove the said cable set in said wiring groove.

[0044] of the filter cavity body further comprises the said isolating rib separated by more than two separating cavity of said separating cavity is set between the cable connected to the signal transmission.

[0045] said cable and said wiring groove interference match with each other the said wiring groove the diameter of the base and the said cable the same as the diameter of said cable embedded into said wiring groove of said cable the space according to said wiring groove the space.

[0046] in order to reinforce the said isolating rib can be used in the intensity and it is set with strengthening rib.

[0047] said cover board includes the tuning cover board and isolation cover board and said tuning cover board for sealing the whole chamber area of the separating cavity area to the outside of the other part of the pressed tightly and the wiring slot cable the cable sealing said wiring groove and said cover board are formed into the pore canal of the signal so as to reach the complete isolation of;

[0048] the said isolated cavity and said cavity body and the other part is separated after tuning on said cover board is set on the isolation cover board said isolation cover plate is used to seal said separating cavity so as to realize separating cavity between the distant from each other so as to achieve the purpose of signal completely separated.

[0049] preferably said separating cavity is two which are respectively set on pcb board the pcb board and wire connection.

[0050] preferably the pcb board is pcb plate is coupled with the lightning-proof.

[0051] this invention the invention claims the application of the tool body one example of this utility model claims a principle and embodiments to the stated above of the embodiment of the invention is only used for helping to understand this utility model claims a method and its core idea; At the same time to the field of the common technology staff according to this utility model claims a idea the specific implementing method and application range is not change is integrated on the top of the instruction book content should not understanding to the utility model claims a limiting.