CN209401811U - Cavity body filter part and its cavity cover plate assembly - Google Patents

Abstract

The utility model relates to a kind of cavity body filter part and its cavity cover plate assemblies.Cover board include substrate, cover in outer surface of substrate metal layer and be formed in the sheet metal of substrate inner surface.Cover board position corresponding with resonant cavity and coupling channel offers debugging via hole.Traditional metal cover board is substituted using the cover board of printed board structure, metal layer and metal cavity cooperate, and form closed shielding space, sheet metal is coupled or is electrically connected with corresponding resonant column, to be effectively reduced resonance frequency.As it can be seen that can also reach corresponding index request in the case where not using the movable resonant column of tep reel, therefore only need lesser metal cavity height.The depth of metal cavity is inserted into, it can be achieved that resonance frequency and coupling amount are adjustable by control tuning plug.Moreover, tuning plug redundance is sheared, the flush with outer surface of end and cover board.Therefore, above-mentioned cavity body filter part is while guaranteeing superior electrical index, moreover it is possible to realize miniaturization, lightweight and low cost.

Description

Cavity body filter part and its cavity cover plate assembly

Technical field

The utility model relates to mobile communication technology field, in particular to a kind of cavity body filter part and its cavity cover board group Part.

Background technique

The introducing of 5G Missive MIMO technology, so that be significantly increased with antenna integrated integrated filter quantity, it is right More stringent requirements are proposed for weight, volume, the cost of filter.Currently, common base station filters type has metal cavity filter Wave device and Ceramic Dielectric Filter, although Ceramic Dielectric Filter has the advantages that lightweight and small size, current technique hair It opens up not mature enough, produces consistency and cost in batches and all have biggish challenge.Currently, small in order to quickly 5G be promoted to build Type metal cavity filter becomes preferred transition scheme.

But due to 5G filter small size, lightweight, the requirement of low cost, existing metal cavity filter it is small Type scheme is not fully up to expectations.For example, using the movable resonant column of tep reel, for the reduction frequency in small size in order to more Mend various errors and use self-locking screw rod or tap scheme and debug etc., cannot meet simultaneously small size, lightweight, it is low at This requirement.

Utility model content

Based on this, it is necessary to for the defect of existing metal cavity filter, provide a kind of in guarantee superior electrical index While, moreover it is possible to realize miniaturization, lightweight, low cost cavity body filter part and its cavity cover plate assembly.

A kind of cavity cover plate assembly, comprising:

Cover board, including with opposite outer surface and inner surface substrate, cover in the metal layer of the outer surface of substrate, The preset coupling regime of substrate inner surface is formed with multiple sheet metals, and the preset tuning region of cover board offers multiple Debug via hole；And

The tuning plug that can be sheared, the tuning plug can be arranged in the debugging via hole, and along the axis of the debugging via hole To operationally sliding.

The predeterminated position of the substrate inner surface is covered with metal strip to form welding section in one of the embodiments, Domain, the welding region are formed with the metallization shielding via hole for connecting the metal layer and the metal strip.

The tuning plug is metal needle in one of the embodiments, and the cross section of the metal needle is in polygon.

The tuning plug is self-tapping screw in one of the embodiments,.

A kind of cavity body filter part, comprising:

Metal cavity is the hollow structure of a side opening, is formed through coupling channel phase mutual coupling in the metal cavity The multiple resonant cavities closed are provided with resonant column in each resonant cavity；And

Cavity cover plate assembly as described in any one of above preferred embodiment, in which:

The cover plate lid be set to the metal cavity opening, the multiple sheet metal respectively with the multiple resonant cavity pair It answers, and each resonant column is coupled with the corresponding sheet metal and insulated with the metal layer, the debugging via hole difference It is corresponding with the multiple resonant cavity and the coupling channel；

The tuning plug is arranged in the debugging via hole and protrudes into the metal cavity predetermined depth, and the tuning plug is prominent It is sheared in the part of the outer surface.

The resonant column is integrally formed structures with the metal cavity in one of the embodiments,.

The resonant column is hollow columnar structures in one of the embodiments, and corresponding with the resonant column described One end of tuning plug is non-contactly arranged in the resonant column.

It in one of the embodiments, further include medium socket, the medium socket is sheathed on the tuning plug and is held on institute It states between the outer wall of tuning plug and the inner wall of the resonant column.

The resonant column abuts with the corresponding sheet metal and realizes electrical connection in one of the embodiments,；

Or the top surface of the resonant column is arranged with the corresponding sheet metal interval, and the sheet metal and the metal Layer electrical connection.

When the sheet metal is electrically connected with the metal layer in one of the embodiments, the cover board and the metal The corresponding position of piece offers metallization connecting hole, to be electrically connected the sheet metal and the metal layer.

Above-mentioned cavity body filter part, traditional metal cover board, metal layer and metal are substituted using the cover board of printed board structure Cavity cooperation, forms closed shielding space, sheet metal is coupled or is electrically connected with corresponding resonant column, to be effectively reduced Resonance frequency.As it can be seen that can also reach corresponding index request in the case where not using the movable resonant column of tep reel, therefore only need Lesser metal cavity height.The depth of metal cavity is inserted into, it can be achieved that resonance frequency and coupling amount can by control tuning plug It adjusts.Moreover, tuning plug redundance is sheared, the flush with outer surface of end and cover board.Therefore, above-mentioned cavity body filter part exists While guaranteeing superior electrical index, the miniaturization, lightweight and low cost of filter are realized.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of cavity body filter part in the utility model preferred embodiment；

Fig. 2 is the structural schematic diagram of cavity body filter part cover plate shown in Fig. 1；

Fig. 3 is the structural schematic diagram of another angle of cavity body filter part cover plate shown in Fig. 1.

Specific embodiment

The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model, It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms It realizes, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes to the utility model The understanding of disclosure is more thorough and comprehensive.

It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ", " right side " and similar statement are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes Any and all combinations of one or more related listed items.

Referring to Fig. 1, the utility model provides a kind of cavity body filter part 100 and cavity cover plate assembly (figure is not marked), The cavity body filter part 100 can be any one of communication devices such as filter, duplexer and combiner.Wherein, this is practical Cavity body filter part 100 in novel preferred embodiment includes metal cavity 110 and cavity cover plate assembly.Cavity cover plate assembly Including cover board 120 and tuning plug 130.

Metal cavity 110 is the hollow structure of a side opening.It is general elongated, cavity is formed with along longitudinally.Gold Belong to and be formed with multiple resonant cavities (figure is not marked) in cavity 110, multiple resonant cavities are intercoupled simultaneously by coupling channel (not shown) It is sequentially connected with, to constitute filtering access.The side wall of metal cavity 110 is provided with Signal connector 113, head and the tail two resonant cavities point Corresponding Signal connector 113 is not connected, to realize the input or output of signal.Specifically, multiple resonant cavities are coaxial resonant cavity. According to electrical specifications needs, inductive coupled or capacitive coupling is realized by windowing or winged bar between each resonant cavity.At this point, coupling is logical Road then respectively corresponds to open a window or fly bar.

Resonant column 111 is provided in each resonant cavity.Specifically in the present embodiment, resonant column 111 is with metal cavity 110 Integrally formed structure.Wherein, resonant column 111 can by integrated die-casting or mach form and 110 one of metal cavity at Type.Compared with the form of the moving reel resonant column used in conventional small filter, cost can be significantly reduced.

Please refer to figs. 2 and 3 together, and cover board 120 is covered on the opening of metal cavity 110.Therefore, cover board 120 and metal Cavity 110 cooperates, and the closed shielding space transmitted for signal is formed inside metal cavity 110.Wherein, cover board 120 includes Substrate 121, metal layer 123 and sheet metal 125.

Substrate 121 is isolation material, plate-like and match with 110 opening shape of metal cavity.Substrate 121 is towards gold The surface for belonging to 110 inner wall of cavity is referred to as inner surface, and the surface of the opposite other side is referred to as outer surface.Metal layer 123 covers In the outer surface of substrate 121.Specifically, metal layer 123 can be copper film, the aluminium film etc. formed by the modes such as being deposited, sputtering Metallic diaphragm structure.

121 inner surface of substrate has preset coupling regime (figure is not marked), the position pair of coupling regime and multiple resonant cavities It answers.Multiple sheet metals 125 are formed in coupling regime.That is, sheet metal 125 is corresponding with the position of multiple resonant cavities.Therefore, Sheet metal 125 can realize coupling or electrical connection with the resonant column 111 in corresponding resonant cavity.Wherein, sheet metal 125 can pass through elder generation In 121 inner surface entirety plated film of substrate, then etch to obtain preset shape and the metal foil structure positioned at predeterminated position.Sheet metal 125 is general rounded, certainly can also be in rectangle or other arbitrary shapes.

Each resonant column 111 is coupled or is electrically connected with corresponding sheet metal 125, and is insulated with metal layer 123, thus not Resonance frequency is effectively reduced under the premise of increasing by 111 structure of resonant column.

In one embodiment, resonant column 111 abuts with corresponding sheet metal 125 and realizes electrical connection, sheet metal 125 with It insulate between metal layer 123.

Specifically, resonant column 111 is column structure, and top surface is extended to be contacted with corresponding sheet metal 125.Pass through weldering It connects, resonant column 111 can be electrically connected with sheet metal 125.At this point, sheet metal 125 is equivalent to the resonance plate of resonant column 111, thus The resonance frequency of resonant column 111 is significantly reduced with lower cost and lesser resonance column dimension.

In another embodiment, the top surface of resonant column 111 is spaced with corresponding sheet metal 125 and is arranged, and sheet metal 125 Be electrically connected with metal layer 123 and with cavity 110 altogether.In this way, passing through the capacitive between 111 top surface of sheet metal 125 and resonant column Coupling, can be effectively reduced resonance frequency.Meanwhile the structure also improves the Q value of cavity body filter part 100, reduces insertion Loss.

For realize sheet metal 125 with metal layer 123 is good is electrically connected, further, in the present embodiment, cover board 120 Position corresponding with sheet metal 125 offers metallization connecting hole 126, to be electrically connected sheet metal 125 and metal layer 123.

Specifically, metallization connecting hole 126 is metallization VIA, electric action is played, thus to be realized with a low cost gold Category piece 125 is electrically connected with metal layer 123.Moreover, multiple weeks along sheet metal 125 are generally distributed on each sheet metal 125 To the metallization connecting hole 126 of setting.

Cover board 120 has preset tuning region (figure is not marked), the position in tuning region and multiple resonant cavities and coupling channel Set correspondence.Moreover, tuning region offers multiple debugging via holes 127.That is, multiple debugging via holes 127 respectively with it is multiple The position of resonant cavity and coupling channel is corresponding.Debugging via hole 127 is metallization VIA, and hole wall is electrically conductive.Via hole 127 is debugged to wrap Two parts are included, a portion passes through on sheet metal 125, can be used for that the resonance frequency of resonant cavity is adjusted.Another portion Divide the then coupling channel across two adjacent resonant cavities, can be used for adjusting the coupling amount of two neighboring resonant cavity Section.

Wherein, debugging via hole 127 does not contact directly with sheet metal 125.Specifically, sheet metal 125 is opened along debugging via hole 127 The circumferential direction of mouth offers groove (not shown), and sheet metal 125 is isolated with debugging via hole 127.

Tuning plug 130 can be sheared.Specifically, tuning plug 130 can be thinner or softer metal rod, can also by Breakpoint arrangement is arranged on tuning plug 130 to realize and can shear.Be with 130 quantity of tuning plug that be adapted to of debugging via hole 127 it is multiple, adding It can be selected as needed when work cavity body filter part 100.Tuning plug 130 can be arranged in debugging via hole 127, and along debugging via hole 127 axial direction is operationally slided.Therefore, tuning plug 130 is operated, controllable tuning plug 130 protrudes into the depth in metal cavity 110 Degree.

Tuning plug 130 protrudes into the difference of depth, and coupling amount is also different, to realize the resonance frequency to each resonant cavity And the adjusting of the coupling amount between two neighboring resonant cavity.When manufacturing cavity body filter part 100, first tuning plug 130 is penetrated Via hole 127 is debugged, then by that can realize 100 electricity of cavity body filter part along the axial movement tuning plug 130 for debugging via hole 127 The debugging of gas parameter.After the completion of debugging, tuning plug 130 and metal layer 123 are welded, and by the modes such as shearing, machining Except tuning plug 130 protrudes from the part of 120 outer surface of lid, the volume of cavity body filter part 100 can be further decreased.

Tuning plug 130 is generally metallic rod shaped structure, can be screw rod or polished rod.In one embodiment, tuning plug 130 For metal needle, and the cross section of metal needle is in polygon.Metal needle construction is simple, at low cost, can further decrease cavity filtering The cost of device 100.Moreover, the cross section of metal needle is polygon, therefore can be with debugging 127 phase clamping of via hole.Therefore, metal needle It is not easy to loosen in debugging process.Wherein, the cross section of common metal needle is square.

In another embodiment, tuning plug 130 can also be self-tapping screw.The self-tapping screw is different from common screw, Do not include nut and bolt head, can be realized and be turned by similar means such as allen wrenches.Accordingly, debugging via hole 127 can be with It is the through-hole that aperture is slightly less than self-tapping screw outer diameter.When debugging, tune can be strutted in smaller range by turning self-tapping screw Via hole 127 is tried, realizes self tapping.At this point, self-tapping screw can cooperate closely in debugging process with debugging via hole 127 always, avoid It loosens.

In the present embodiment, resonant column 111 is hollow columnar structures, and corresponding with resonant column 111 tuning plug 130 One end is non-contactly arranged in resonant column 111.The partially-tuned bar 130 refers to carrying out the resonance frequency of each resonant cavity The tuning plug 130 of adjusting.By the way that resonant column 111 and tuning plug 130 are socketed, it is possible to increase the relative area of the two, and then increase Coupling amount, to further decrease the resonance frequency of resonant cavity.

Further, in the present embodiment, cavity body filter part 100 further includes medium socket 140.Medium socket 140 is sheathed on Tuning plug 130 is simultaneously held between the outer wall of tuning plug 130 and the inner wall of resonant column 111.

Specifically, medium socket 140 is generally the isolation materials such as plastics, rubber, silica gel, it is possible to increase tuning plug 130 and resonance Frictional force between column 111.Therefore, utilization biggish frictional force between the two can play limit and fixation when adjusting, Tuning plug 130 continues to be subjected to displacement after the completion of preventing tuning plug 130 from loosening and debugging.Meanwhile medium socket 140 can also prevent 111 short circuit of tuning plug 130 and resonant column, and the capacitive coupling amount of increase between the two is to further decrease resonance frequency.

In the present embodiment, cover board 120 is fixed on metal cavity 110 by welding.It is fastened with traditional screw Mode compare, welding manner can reduce the height of metal cavity 110, to be conducive to the miniaturization of cavity body filter part 100.

Further, in the present embodiment, the predeterminated position of 121 inner surface of substrate is covered with metal strip 129 to form weldering Connect region (figure is not marked).Metal strip 129 is also the metal layer structure of bar shaped, and molding mode can be identical as sheet metal 125.But It is that metal strip 129 is isolated with sheet metal 125.Wherein, welding region and the profile of 110 cavity wall of metal cavity match.

Specifically, welding region is normally at the cavity wall between the edge and resonant cavity of cover board 120.Welding region is formed There is the metallization of connection metal layer 123 and metal strip 129 shielding via hole 128, so that the two realization is electrically connected altogether.

When installing cover board 120, by the cavity wall of welding region alignment metal cavity 110, and by metal strip 129 and wire chamber The cavity wall of body 110 realizes welding, thus fixed cover board 120.Metal strip 129 and metallization shielding via hole 128 cooperate, and realize metal Layer 123 is electrically connected altogether with metal cavity 110.

Above-mentioned cavity body filter part 100 substitutes traditional metal cover board, metal layer using the cover board 120 of printed board structure 123 cooperate with metal cavity 110, form closed shielding space, sheet metal 125 is coupled with corresponding resonant column 111 or electricity Connection, to be effectively reduced resonance frequency.As it can be seen that can also reach phase in the case where not using the movable resonant column of tep reel The index request answered, therefore only need lesser 110 height of metal cavity.Metal cavity 110 is inserted by control tuning plug 130 Depth is, it can be achieved that resonance frequency and coupling amount are adjustable.Moreover, 130 redundance of tuning plug is sheared, end and cover board 120 Flush with outer surface.Therefore, above-mentioned cavity body filter part 100 is while guaranteeing superior electrical index, realizes miniaturization, light Quantization and low cost.

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.

Claims (10)

1. a kind of cavity cover plate assembly characterized by comprising

Cover board, including with opposite outer surface and inner surface substrate, cover in the metal layer of the outer surface of substrate, it is described The preset coupling regime of substrate inner surface is formed with multiple sheet metals, and the preset tuning region of cover board offers multiple debugging Via hole；And

Multiple tuning plugs sheared of the debugging via hole are adapted to, the tuning plug can be arranged in the debugging via hole, And it is operationally slided along the axial direction of the debugging via hole.

2. cavity cover plate assembly according to claim 1, which is characterized in that the predeterminated position of the substrate inner surface covers There is metal strip to form welding region, the welding region is formed with the metallization screen for connecting the metal layer and the metal strip Cover via hole.

3. cavity cover plate assembly according to claim 1, which is characterized in that the tuning plug is metal needle, and the gold The cross section for belonging to needle is in polygon.

4. cavity cover plate assembly according to claim 1, which is characterized in that the tuning plug is self-tapping screw.

5. a kind of cavity body filter part characterized by comprising

Metal cavity is the hollow structure of a side opening, is formed through what coupling channel intercoupled in the metal cavity Multiple resonant cavities are provided with resonant column in each resonant cavity；And

Such as the described in any item cavity cover plate assemblies of above-mentioned Claims 1-4, in which:

The cover plate lid is set to the opening of the metal cavity, and the multiple sheet metal is corresponding with the multiple resonant cavity respectively, And each resonant column and corresponding sheet metal coupling and insulate with the metal layer, the debugging via hole respectively with institute It states multiple resonant cavities and the coupling channel is corresponding；

The tuning plug is arranged in the debugging via hole and protrudes into the metal cavity predetermined depth, and the tuning plug protrudes from institute The part for stating outer surface is sheared.

6. cavity body filter part according to claim 5, which is characterized in that the resonant column is one with the metal cavity Body formed structure.

7. cavity body filter part according to claim 5, which is characterized in that the resonant column is hollow columnar structures, and One end of the tuning plug corresponding with the resonant column is non-contactly arranged in the resonant column.

8. cavity body filter part according to claim 7, which is characterized in that further include medium socket, the medium socket is arranged In the tuning plug and it is held between the outer wall of the tuning plug and the inner wall of the resonant column.

9. according to the described in any item cavity body filter parts of claim 5 to 7, which is characterized in that the resonant column with it is corresponding The sheet metal abuts and realizes electrical connection；

Or the top surface of the resonant column is arranged with the corresponding sheet metal interval, and the sheet metal and metal layer electricity Connection.

10. cavity body filter part according to claim 9, which is characterized in that the sheet metal is electrically connected with the metal layer When connecing, cover board position corresponding with the sheet metal offers metallization connecting hole, to be electrically connected the sheet metal and institute State metal layer.