CN213905570U - Adjustable cross coupling structure and cavity filter - Google Patents
Adjustable cross coupling structure and cavity filter Download PDFInfo
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- CN213905570U CN213905570U CN202023045073.2U CN202023045073U CN213905570U CN 213905570 U CN213905570 U CN 213905570U CN 202023045073 U CN202023045073 U CN 202023045073U CN 213905570 U CN213905570 U CN 213905570U
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Abstract
The utility model relates to a wave filter technical field discloses an adjustable cross coupling structure and cavity filter. The invention provides a novel cross coupling structure capable of realizing effective adjustment of cross coupling quantity outside a cavity filter, namely, the novel cross coupling structure comprises an adjusting drive rod and a gear transmission mechanism, one end of the adjusting drive rod is used as a rotary adjusting end positioned outside the cavity filter, the other end of the adjusting drive rod is used for driving two coupling rods to do linear reciprocating motion in corresponding resonant cavities through the gear transmission mechanism inside the cavity filter, and further, based on the change of the suspended positions of the two coupling rods in the corresponding resonant cavities, the generated cross coupling quantity can be effectively adjusted, and the purpose of effectively adjusting the cross coupling quantity outside the cavity filter is realized, so that the debugging time can be greatly shortened, the production efficiency is improved, the performance stability of the filter is ensured, and the novel cross coupling structure is convenient for practical application and popularization.
Description
Technical Field
The utility model belongs to the technical field of the wave filter, specifically relate to an adjustable cross coupling structure and cavity filter.
Background
The filter is used as an indispensable frequency selection device for a transmitting end and a receiving end in a modern wireless communication system, and the performance of the filter has important influence on the index of the whole machine. Especially, the cavity filter has the advantages of low insertion loss, high selectivity, high power capacity and the like, so that the cavity filter is widely applied to various communication systems.
With the rapid development of communication technology, new communication systems are continuously appeared, the number of the communication systems is increased, the frequency spectrum interval is closer, and therefore higher and higher requirements are provided for the out-of-band rejection of the filter. At present, the out-of-band rejection capability of the cavity filter can be further improved by arranging a cross-coupling structure between the resonant cavities to generate a transmission zero.
The traditional cross coupling structure is usually fixed on the cavity wall between two adjacent resonant cavities in the form of a flying rod, the cross coupling amount which can be generated can be adjusted by adjusting the position of the flying rod only by opening a cover plate, and the cross coupling amount cannot be effectively adjusted outside a cavity filter. Therefore, in the actual production process, due to the influence of errors such as machining or assembly, the cross coupling quantity is difficult to be just matched with the actual required value and is often required to be adjusted, and for the traditional cross coupling structure, the cavity filter needs to be repeatedly disassembled and assembled to adjust the cross coupling quantity, so that the debugging time is seriously prolonged, the production efficiency is low, and the adverse influence can be generated on the performance stability of the filter.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the cross-coupling structure can be effectively adjusted by opening the cavity filter at present, the utility model aims to provide an adjustable cross-coupling structure and cavity filter can realize the purpose of adjusting the cross-coupling amount outside the cavity filter, can shorten the debugging time greatly, improve production efficiency, ensure the stable performance of filter.
In a first aspect, the utility model discloses the technical scheme who adopts does:
an adjustable cross coupling structure comprises an adjusting driving rod, a cross coupling rod and a gear transmission mechanism, wherein the cross coupling rod comprises a first coupling rod suspended in a first resonant cavity and a second coupling rod suspended in a second resonant cavity, and the first resonant cavity and the second resonant cavity are a pair of two adjacent resonant cavities;
one end of the adjusting driving rod is used as a rotating adjusting end positioned on the outer side of the cavity filter, and the other end of the adjusting driving rod is used for being in transmission connection with the first coupling rod and the second coupling rod through the gear transmission mechanism in the cavity filter, so that the first coupling rod and the second coupling rod are driven to do linear reciprocating motion in the corresponding resonant cavity.
Preferably, the gear transmission mechanism comprises an insulating box body, an insulating cover plate, an insulating connecting rod, a gear, a first rack and a second rack, wherein a first through hole for the first coupling rod to penetrate out and a second through hole for the second coupling rod to penetrate out are formed in the side wall of the insulating box body, and the first rack and the second rack are in a right-angle rotation relationship, a blunt rotation relationship or a flat rotation relationship relative to the central axis of the gear;
the insulating cover plate is arranged at the top of the insulating box body and covers to form a space surrounding the insulating connecting rod, the gear, the first rack and the second rack;
the non-rotating adjusting end of the adjusting driving rod is connected with one end of the insulating connecting rod in a shaft mode after movably penetrating through the insulating cover plate, the other end of the insulating connecting rod is connected with the gear in a shaft mode, and the gear is meshed with the first rack and the second rack respectively so as to drive the first rack and the second rack to do linear reciprocating motion;
one end of the first rack, which moves linearly, is fixedly connected with one end of the first coupling rod, and the other end of the first coupling rod penetrates through the first through hole;
and one end of the second rack in linear motion is fixedly connected with one end of the second coupling rod, and the other end of the second coupling rod penetrates out of the second through hole.
Preferably, the gear transmission mechanism further comprises a first elastic element and a second elastic element which are always in a compression/tension state;
one end of the first elastic piece is fixedly connected with the other end of the first rack in linear motion, and the other end of the first elastic piece is fixedly connected with the inner wall surface of the insulating box body;
one end of the second elastic piece is fixedly connected with the other end of the second rack in linear motion, and the other end of the second elastic piece is fixedly connected with the inner wall surface of the insulating box body.
Preferably, the non-rotation adjusting end of the adjusting driving rod is set as a central shaft, the insulating connecting rod is set as a cylindrical cylinder, and the rotation center of the gear is provided with a central hole, wherein the radial size of the central shaft is smaller than that of the rotation adjusting end;
the gear is sleeved on one end of the cylindrical cylinder through the central hole, and the other end of the cylindrical cylinder is sleeved on the central shaft.
In a detailed optimization mode, first key-shaped reinforcing ribs which are axially arranged are arranged on the outer side surface of the cylindrical column body, second key-shaped reinforcing ribs which are axially arranged are arranged on the inner side surface of the cylindrical column body, first key grooves which are used for being matched with the first key-shaped reinforcing ribs are arranged on the inner side surface of the central hole, and second key grooves which are used for being matched with the second key-shaped reinforcing ribs are arranged on the outer side surface of the central shaft;
when the gear, the cylindrical cylinder and the central shaft are sequentially sleeved in pairs, the first key-shaped reinforcing rib is bonded with the first key groove, and the second key-shaped reinforcing rib is bonded with the second key groove, so that a sleeving mechanism formed by the gear, the cylindrical cylinder and the central shaft can stretch in the direction of the central axis of the gear.
Preferably, the gear, the first rack and the second rack are all made of a conductive material, so that the first coupling rod is electrically communicated with the second coupling rod.
Preferably, each of the first coupling rod and the second coupling rod comprises a rod body part and a reinforcing disc;
one end of the rod body part is fixedly connected with the corresponding rack, the other end of the rod body part is fixedly connected with the reinforcing disc, and the reinforcing disc is always positioned on the outer side of the insulating box body.
Specifically, the end face of the rotation adjusting end is provided with an adjusting groove, wherein the adjusting groove is a straight groove, a cross groove, an inner hexagonal groove or an inner hexagonal groove.
In a second aspect, the utility model discloses the technical scheme who adopts still does:
a cavity filter comprises the adjustable cross coupling structure as described in the first aspect, and further comprises a filter box body and a filter cover plate, wherein a plurality of resonant cavities are arranged in the filter box body, and notches are arranged on the cavity walls between two adjacent resonant cavities in the plurality of resonant cavities;
the filter cover plate is arranged at the top of the filter box body and covers the filter box body to form a filter cavity;
the adjustable cross coupling structure is installed in the notch, wherein a rotation adjusting end of the adjusting driving rod penetrates through the filter cover plate and is located on the outer side of the filter cover plate, the first coupling rod is suspended in a first resonant cavity of the two adjacent resonant cavities, and the second coupling rod is suspended in a second resonant cavity of the two adjacent resonant cavities.
Preferably, the peripheral surface of adjusting the actuating lever is equipped with the screw thread and can pass through the nut and/or screw locking in the wave filter apron is fixed on the wave filter apron, wherein, the nut is located the outside of wave filter apron.
The utility model has the advantages that:
(1) the utility model provides a novel cross coupling structure which can realize effective adjustment of cross coupling quantity outside a cavity filter, namely, the cavity filter comprises an adjusting driving rod and a gear transmission mechanism, one end of the adjusting driving rod is used as a rotary adjusting end positioned at the outer side of the cavity filter, the other end of the adjusting driving rod is used for driving two coupling rods to do linear reciprocating motion in corresponding resonant cavities through the gear transmission mechanism in the cavity filter, and further based on the change of the suspended positions of the two coupling rods in the corresponding resonant cavities, the cross coupling amount can be effectively adjusted, the aim of effectively adjusting the cross coupling amount outside the cavity filter is fulfilled, compared with the traditional cross coupling structure which can be effectively adjusted only by repeatedly disassembling and assembling the cavity filter, the debugging time can be greatly shortened, the production efficiency is improved, and the performance stability of the filter is ensured;
(2) in an insulating box of the gear transmission mechanism, through the elastic structure design, the rack can be stably meshed with the gear without disengagement by utilizing the elastic force generated by deformation (namely, the contact between the teeth of the meshed gears is good), and the electrical connection stability between the two coupling rods can be ensured due to the good contact between the teeth of the gears;
(3) in an insulating box of the gear transmission mechanism, through two bonding structure designs between the adjusting driving rod and the gear, a sleeving mechanism formed by the gear, the cylindrical cylinder and the central shaft can be stretched in the direction of the central axis, so that the change of the adjusting driving rod in depth due to rotation is counteracted, the rotating plane of the gear is ensured not to translate, and finally the two coupling rods are always in linear reciprocating motion on the same plane, thereby further ensuring the performance stability of the cavity filter;
(4) the adjustable cross coupling structure also has the advantages of flexible design, convenient processing, simple structure, easy realization and the like, and is convenient for practical application and popularization;
(5) in the cavity filter, the adjusting driving rod can be locked through the nut and/or the screw hole after the positions of the two coupling rods are adjusted, so that the adjusted cross coupling amount is prevented from being changed due to the looseness of the adjusting driving rod, and the performance stability of the cavity filter is further ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a splitting structure of an adjustable cross-coupled structure provided by the present invention.
Fig. 2 is a schematic diagram of an internal structure of the adjustable cross-coupling structure provided by the present invention.
Fig. 3 is a schematic diagram of a splitting structure of the cavity filter provided by the present invention.
Fig. 4 is a schematic diagram of an internal structure of the cavity filter provided by the present invention.
In the above drawings: 1-adjusting the drive rod; 11-a central axis; 12-a second keyway; 13-an adjustment tank; 2-cross-coupled rods; 21-a first coupling rod; 22-a second coupling rod; 231-a shaft portion; 232-an enhanced disc; 3-a gear transmission mechanism; 31-an insulating case; 311-a first via; 312 — a second via; 32-an insulating cover plate; 33-an insulated connecting rod; 330-cylindrical column; 331-first key-shaped reinforcing ribs; 34-a gear; 351-a first rack; 352-second rack; 361-a first elastic member; 362-a second elastic member; 100-a filter cartridge; 200-a filter cover plate; 300-a resonant cavity; 400-notch; 500-a nut; 600-resonant rod.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that, for the term "and/or" as may appear herein, it is merely an associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time; for the term "/and" as may appear herein, which describes another associative object relationship, it means that two relationships may exist, e.g., a/and B, may mean: a exists independently, and A and B exist simultaneously; in addition, for the character "/" that may appear herein, it generally means that the former and latter associated objects are in an "or" relationship.
It will be understood that when an element is referred to herein as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to herein as being "directly connected" or "directly coupled" to another element, it is not intended that an intervening element be present. In addition, other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …", "adjacent" versus "directly adjacent", etc.).
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used herein, specify the presence of stated features, quantities, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, quantities, steps, operations, elements, components, and/or groups thereof.
It should also be noted that, in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed substantially concurrently, or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
It should be understood that specific details are provided in the following description to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams in order not to obscure the examples in unnecessary detail. In other instances, well-known processes, structures and techniques may be shown without unnecessary detail in order to avoid obscuring example embodiments.
Example one
As shown in fig. 1-2, the adjustable cross-coupling structure provided in this embodiment includes an adjusting driving rod 1, a cross-coupling rod 2, and a gear transmission mechanism 3, where the cross-coupling rod 2 includes a first coupling rod 21 suspended in a first resonant cavity and a second coupling rod 22 suspended in a second resonant cavity, and the first resonant cavity and the second resonant cavity are a pair of two adjacent resonant cavities; one end of the adjusting driving rod 1 is used as a rotating adjusting end located outside the cavity filter, and the other end of the adjusting driving rod 1 is used for being in transmission connection with the first coupling rod 21 and the second coupling rod 22 through the gear transmission mechanism 3 inside the cavity filter, so as to drive the first coupling rod 21 and the second coupling rod 22 to do linear reciprocating motion in the corresponding resonant cavity.
As shown in fig. 1-2, in the specific structure of the adjustable cross-coupling structure, the adjusting driving rod 1 is configured to drive the two coupling rods to make a linear reciprocating motion in the corresponding resonant cavity by using a transmission relationship between the gear transmission mechanism 3 and the first coupling rod 21 and the second coupling rod 22 when the whole rod body is rotated by acting on the rotation adjusting end, so that the generated cross-coupling amount can be effectively adjusted based on a change of a suspended position of the two coupling rods in the corresponding resonant cavity. The adjusting driving rod 1 can be made of, but is not limited to, a metal material, and in order to facilitate the rotation adjusting end, preferably, an adjusting groove 13 is formed in an end surface of the rotation adjusting end, wherein the adjusting groove 13 includes, but is not limited to, a straight groove, a cross groove, an inner hexagonal groove, or an inner hexagonal groove. The gear transmission mechanism 3 is used for realizing kinetic energy transmission and converting the rotary motion into linear reciprocating motion, and can be realized by adopting an existing gear transmission mechanism without limitation. The first coupling rod 21 and the second coupling rod 22 are both conductive metal rods, and can generate the required cross coupling amount through the suspension design in the corresponding resonant cavity. In addition, the first coupling rod 21 and the second coupling rod 22 preferably have the same shape and size and are made of the same material so as to ensure that a desired amount of cross-coupling is generated.
Therefore, based on the detailed description of the adjustable cross coupling structure, a novel cross coupling structure capable of effectively adjusting the cross coupling quantity outside the cavity filter is provided, namely, the novel cross coupling structure comprises an adjusting driving rod and a gear transmission mechanism, one end of the adjusting driving rod is used as a rotary adjusting end positioned outside the cavity filter, the other end of the adjusting driving rod is used for driving two coupling rods to do linear reciprocating motion in corresponding resonant cavities through the gear transmission mechanism inside the cavity filter, and further, based on the change of the suspended positions of the two coupling rods in the corresponding resonant cavities, the generated cross coupling quantity can be effectively adjusted, the purpose of effectively adjusting the cross coupling quantity outside the cavity filter is realized, compared with the traditional cross coupling structure which can effectively adjust only by repeatedly disassembling and assembling the cavity filter, the debugging time can be greatly shortened, the production efficiency is improved, the performance stability of the filter is ensured, and the practical application and popularization are facilitated.
Preferably, the gear transmission mechanism 3 includes an insulating box 31, an insulating cover 32, an insulating connecting rod 33, a gear 34, a first rack 351 and a second rack 352, wherein a first through hole 311 for the first coupling rod 21 to pass through and a second through hole 312 for the second coupling rod 22 to pass through are provided on a side wall of the insulating box 31, and the first rack 351 and the second rack 352 are in a right-angle rotation relationship, a blunt rotation relationship or a straight rotation relationship with respect to a central axis of the gear 34; the insulation cover plate 32 is installed on the top of the insulation box 31, and covers a space surrounding the insulation connection rod 33, the gear 34, the first rack 351 and the second rack 352; after the non-rotating adjusting end of the adjusting driving rod 1 movably passes through the insulating cover plate 32, the shaft is connected with one end of the insulating connecting rod 33, the other end of the insulating connecting rod 33 is connected with the gear 34, and the gear 34 is respectively engaged with the first rack 351 and the second rack 352 so as to drive the first rack 351 and the second rack 352 to do linear reciprocating motion; one end of the first rack 351, which moves linearly, is fixedly connected to one end of the first coupling rod 21, and the other end of the first coupling rod 21 penetrates through the first through hole 311; one end of the second rack 352 moving linearly is fixedly connected to one end of the second coupling rod 22, and the other end of the second coupling rod 22 passes through the second through hole 312.
As shown in fig. 1 and 2, the insulating box 31 and the insulating cover 32 are used to prevent foreign matters from entering the box, affecting transmission relationship, and ensure that conductive parts (such as the gear 34, the first rack 351 and the second rack 352) in the box are insulated from the conductive part of the cavity filter, and they may be made of engineering plastics or other insulating materials. The insulating connecting rod 33 is used for insulating the adjusting driving rod 1 and the gear 34 (especially when the adjusting driving rod 1 and the gear 34 are made of metal materials) while realizing the shaft connection of the adjusting driving rod 1 to the gear 34, and the insulating connecting rod can be made of engineering plastics or other insulating materials. The gear 34 is used for driving the first rack 351 and the second rack 352 to make linear reciprocating motion by clockwise or counterclockwise rotation, and further driving the first coupling rod 21 and the second coupling rod 22 to make linear reciprocating motion in the corresponding resonant cavities, that is, the purpose of specifically realizing kinetic energy transmission and converting rotary motion into linear reciprocating motion is achieved. In order to ensure the rotational stability of the gear 34, a circular hole may be formed in the center of the bottom surface of the insulating box 31, and the circular step body at the bottom of the gear 34 is slidably fitted in the circular hole, so as to restrain the rotational offset of the gear through the circular hole. The modules of the gear 34, the first rack 351 and the second rack 352 are the same, and can be reasonably selected according to the required transmission force. The rotational relationship between the first rack 351 and the second rack 352 relative to the central axis of the gear 34 can also be selected according to the shape and/or position of two adjacent resonant cavities, for example, as shown in fig. 2, the first rack 351 and the second rack 352 are in a flat angular rotational relationship (i.e. rotated by 180 degrees) relative to the central axis of the gear 34, so that the first coupling rod 21 and the second coupling rod 22 can perform a linear reciprocating motion away from each other. The first and second racks 351 and 352 are preferably of the same size and material to ensure a desired amount of cross-coupling. The fixed connection relationship between the rack and the coupling rod can be determined by, but not limited to, screwing, riveting, welding and/or gluing. In addition, in order to realize the electrical connection between the first coupling rod 21 and the second coupling rod 22 and ensure that the required cross-coupling amount can be generated, it is preferable that the gear 34, the first rack 351 and the second rack 352 are made of an electrically conductive material so that the first coupling rod 21 is electrically connected to the second coupling rod 22.
Preferably, the gear transmission mechanism 3 further comprises a first elastic member 361 and a second elastic member 362 which are always in a compression/tension state; one end of the first elastic member 361 is fixedly connected to the other end of the first rack 351, which moves linearly, and the other end of the first elastic member 361 is fixedly connected to the inner wall surface of the insulating box 31; one end of the second elastic member 362 is fixedly connected to the other end of the second rack 352, which moves linearly, and the other end of the second elastic member 362 is fixedly connected to the inner wall surface of the insulating case 31. As shown in fig. 1 and 2, the aforementioned fixed connection relationship includes, but is not limited to: when the elastic element is always in a compression state, the fixed connection relation which is relatively stable can be realized through static friction force generated by end contact, and a limiting blind hole can be arranged on the linear motion end face of the rack and the inner wall face of the insulating box body to restrict the movement of the elastic element. Meanwhile, through the elastic structure design, the rack can stably engage the gear without disengaging (namely, the contact between the teeth of the engaged wheel is good) by utilizing the elastic force generated by deformation, and the stability of the electrical connection between the two coupling rods can be ensured because the contact between the teeth of the wheel is good. In addition, the first elastic member 361 or the second elastic member 362 may be, but is not limited to, implemented by a coil spring.
Preferably, the non-rotation adjusting end of the adjusting driving rod 1 is set as a central shaft 11, the insulating connecting rod 33 is set as a cylindrical cylinder 330, and the rotation center of the gear 34 is provided with a central hole, wherein the radial dimension of the central shaft 11 is smaller than that of the rotation adjusting end; the gear 34 is sleeved on one end of the cylindrical cylinder 330 through the central hole, and the other end of the cylindrical cylinder 330 is sleeved on the central shaft 11. As shown in fig. 1, since the radial dimension of the central shaft 11 is smaller than the radial dimension of the rotation adjusting end, the central shaft 11 can be conveniently aligned with the end opening of the cylindrical column 330 during assembly, which is beneficial to further improving the production efficiency.
In a detailed optimization, a first key-shaped reinforcing rib 331 arranged axially is arranged on the outer side surface of the cylindrical column 330, a second key-shaped reinforcing rib arranged axially is arranged on the inner side surface of the cylindrical column 330, a first key slot used for being matched with the first key-shaped reinforcing rib 331 is arranged on the inner side surface of the central hole, and a second key slot 12 used for being matched with the second key-shaped reinforcing rib is arranged on the outer side surface of the central shaft 11; when the gear 34, the cylindrical column 330 and the central shaft 11 are sequentially sleeved in pairs, the first key-shaped reinforcing rib 331 is bonded to the first key groove, and the second key-shaped reinforcing rib is bonded to the second key groove 12, so that the sleeving mechanism formed by the gear 34, the cylindrical column 330 and the central shaft 11 can extend and retract in the direction of the central axis of the gear 34. As shown in fig. 1, it is considered that the depth of the adjusting driving rod 1 entering the cavity filter may be changed in the rotating process, so that the socket mechanism formed by the gear 34, the cylindrical column 330 and the central shaft 11 can be extended and retracted in the central axis direction by the bonding action of the two key-shaped reinforcing ribs and the key grooves, so as to offset the change of the adjusting driving rod 1 in the depth, ensure that the rotating plane of the gear 34 does not translate, and finally make the first coupling rod 21 and the second coupling rod 22 perform linear reciprocating motion on the same plane all the time, thereby further ensuring the performance stability of the cavity filter.
Preferably, each of the first coupling rod 21 and the second coupling rod 22 includes a rod body 231 and a reinforcing disc 232; one end of the lever 231 is fixedly connected with a corresponding rack, the other end of the lever 231 is fixedly connected with the reinforcing disc 232, and the reinforcing disc 232 is always positioned outside the insulating box 31. As shown in fig. 1 and 2, the reinforcing disk 232 serves to increase the amount of cross-coupling generated, further enhancing the out-of-band rejection capability of the cavity filter. Furthermore, the two coupling rods can be obtained by integral turning of a metal bar stock.
In summary, the adjustable cross-coupling structure provided by the embodiment has the following technical effects:
(1) the embodiment provides a novel cross-coupling structure which can realize effective adjustment of cross-coupling amount outside the cavity filter, namely, the cavity filter comprises an adjusting driving rod and a gear transmission mechanism, one end of the adjusting driving rod is used as a rotary adjusting end positioned at the outer side of the cavity filter, the other end of the adjusting driving rod is used for driving two coupling rods to do linear reciprocating motion in corresponding resonant cavities through the gear transmission mechanism in the cavity filter, and further based on the change of the suspended positions of the two coupling rods in the corresponding resonant cavities, the cross coupling amount can be effectively adjusted, the aim of effectively adjusting the cross coupling amount outside the cavity filter is fulfilled, compared with the traditional cross coupling structure which can be effectively adjusted only by repeatedly disassembling and assembling the cavity filter, the debugging time can be greatly shortened, the production efficiency is improved, and the performance stability of the filter is ensured;
(2) in an insulating box of the gear transmission mechanism, through the elastic structure design, the rack can be stably meshed with the gear without disengagement by utilizing the elastic force generated by deformation (namely, the contact between the teeth of the meshed gears is good), and the electrical connection stability between the two coupling rods can be ensured due to the good contact between the teeth of the gears;
(3) in an insulating box of the gear transmission mechanism, through two bonding structure designs between the adjusting driving rod and the gear, a sleeving mechanism formed by the gear, the cylindrical cylinder and the central shaft can be stretched in the direction of the central axis, so that the change of the adjusting driving rod in depth due to rotation is counteracted, the rotating plane of the gear is ensured not to translate, and finally the two coupling rods are always in linear reciprocating motion on the same plane, thereby further ensuring the performance stability of the cavity filter;
(4) the adjustable cross coupling structure also has the advantages of flexible design, convenient processing, simple structure, easy realization and the like, and is convenient for practical application and popularization.
Example two
As shown in fig. 3 to 4, this embodiment provides a novel cavity filter specifically using the adjustable cross-coupling structure based on the technical solution of the first embodiment, that is, the novel cavity filter includes the adjustable cross-coupling structure as described in the first embodiment, and further includes a filter box 100 and a filter cover 200, wherein a plurality of resonant cavities 300 are disposed in the filter box 100, and a notch 400 is disposed on a cavity wall between two adjacent resonant cavities in the plurality of resonant cavities 300; the filter cover plate 200 is installed on the top of the filter box 100 and covers the filter box to form a filter cavity; the adjustable cross-coupling structure is installed in the notch 400, wherein the rotation adjusting end of the adjusting driving rod 1 penetrates through the filter cover plate 200 and is located at the outer side of the filter cover plate 200, the first coupling rod 21 is suspended in a first resonant cavity of the two adjacent resonant cavities, and the second coupling rod 22 is suspended in a second resonant cavity of the two adjacent resonant cavities. As shown in fig. 3 and 4, the notch 400 is disposed on the cavity wall between the upper left-corner resonant cavity and the lower right-corner resonant cavity, and the insulating box 31 is placed on the bottom surface of the notch 400, and the side wall of the insulating box 31 and the side wall of the notch 400 are in interference fit, so as to fixedly mount the insulating box 31 in the notch 400, suspend the first coupling rod 21 in the upper left-corner resonant cavity and suspend the second coupling rod 22 in the lower right-corner resonant cavity, and further, by means of the adjustable cross-coupling structure, the cross-coupling amount between the upper left-corner resonant cavity and the lower right-corner resonant cavity can be effectively adjusted outside the cavity filter, thereby improving the out-of-band rejection capability of the filter. In addition, in each of the plurality of resonant cavities 300, a one-to-one corresponding resonant rod 600 may be further disposed at a central position.
Preferably, the adjusting driving rod 1 has a thread on its outer circumferential surface and can be locked and fixed on the filter cover plate 200 by a nut 500 and/or a screw hole in the filter cover plate 200, wherein the nut 500 is located on the outer side of the filter cover plate 200. As shown in fig. 3, after the positions of the two coupling rods are adjusted, the adjusting driving rod is locked by the nut 500 and/or the screw hole, so that the adjusted cross coupling amount is not changed due to the looseness of the adjusting driving rod, and the performance stability of the cavity filter is further ensured.
Preferably, the planes of the linear motion direction of the first coupling rod 21 and the linear motion direction of the second coupling rod 22 are parallel to the bottom surfaces of the plurality of resonant cavities 300, so as to ensure that a desired cross-coupling amount is generated.
The technical effects of the embodiment further include, on the basis of the technical effects of the first embodiment: (1) the adjusting driving rod can be locked through the nut and/or the screw hole after the positions of the two coupling rods are adjusted, so that the adjusted cross coupling amount is prevented from being changed due to the looseness of the adjusting driving rod, and the performance stability of the cavity filter is further ensured.
The various embodiments described above are merely illustrative, and may or may not be physically separate, as they relate to elements illustrated as separate components; if reference is made to a component displayed as a unit, it may or may not be a physical unit, and may be located in one place or distributed over a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some technical features may still be made. Such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Finally, it should be noted that the present invention is not limited to the above-mentioned alternative embodiments, and that various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the following claims, and which can be used to interpret the claims.
Claims (10)
1. An adjustable cross-coupling structure, characterized by: the device comprises an adjusting driving rod (1), a cross coupling rod (2) and a gear transmission mechanism (3), wherein the cross coupling rod (2) comprises a first coupling rod (21) suspended in a first resonant cavity and a second coupling rod (22) suspended in a second resonant cavity, and the first resonant cavity and the second resonant cavity are a pair of two adjacent resonant cavities;
one end of the adjusting driving rod (1) is used as a rotary adjusting end positioned outside the cavity filter, and the other end of the adjusting driving rod (1) is used for being in transmission connection with the first coupling rod (21) and the second coupling rod (22) through the gear transmission mechanism (3) in the cavity filter, so that the first coupling rod (21) and the second coupling rod (22) are driven to do linear reciprocating motion in the corresponding resonant cavity.
2. The tunable cross-coupling structure of claim 1, wherein: the gear transmission mechanism (3) comprises an insulating box body (31), an insulating cover plate (32), an insulating connecting rod (33), a gear (34), a first rack (351) and a second rack (352), wherein a first through hole (311) for the first coupling rod (21) to penetrate out and a second through hole (312) for the second coupling rod (22) to penetrate out are formed in the side wall of the insulating box body (31), and the first rack (351) and the second rack (352) are in a right-angle rotation relationship, a blunt rotation relationship or a flat rotation relationship relative to the central axis of the gear (34);
the insulation cover plate (32) is mounted on the top of the insulation box body (31) and covers a space surrounding the insulation connecting rod (33), the gear (34), the first rack (351) and the second rack (352);
the non-rotating adjusting end of the adjusting driving rod (1) is connected with one end of the insulating connecting rod (33) in a shaft mode after movably penetrating through the insulating cover plate (32), the other end of the insulating connecting rod (33) is connected with the gear (34) in a shaft mode, and the gear (34) is meshed with the first rack (351) and the second rack (352) respectively so as to drive the first rack (351) and the second rack (352) to do linear reciprocating motion;
one end of the first rack (351) which moves linearly is fixedly connected with one end of the first coupling rod (21), and the other end of the first coupling rod (21) penetrates through the first through hole (311);
one end of the second rack (352) which moves linearly is fixedly connected with one end of the second coupling rod (22), and the other end of the second coupling rod (22) penetrates through the second through hole (312).
3. The tunable cross-coupling structure of claim 2, wherein: the gear transmission mechanism (3) also comprises a first elastic element (361) and a second elastic element (362) which are always in a compression/tension state;
one end of the first elastic piece (361) is fixedly connected with the other end of the first rack (351) which moves linearly, and the other end of the first elastic piece (361) is fixedly connected with the inner wall surface of the insulating box body (31);
one end of the second elastic piece (362) is fixedly connected with the other end of the second rack (352) which moves linearly, and the other end of the second elastic piece (362) is fixedly connected with the inner wall surface of the insulating box body (31).
4. The tunable cross-coupling structure of claim 2, wherein: the non-rotation adjusting end of the adjusting driving rod (1) is set to be a central shaft (11), the insulating connecting rod (33) is set to be a cylindrical cylinder (330), the rotation center of the gear (34) is provided with a central hole, and the radial dimension of the central shaft (11) is smaller than that of the rotation adjusting end;
the gear (34) is sleeved on one end of the cylindrical cylinder (330) through the central hole, and the other end of the cylindrical cylinder (330) is sleeved on the central shaft (11).
5. The tunable cross-coupling structure of claim 4, wherein: a first key-shaped reinforcing rib (331) which is axially arranged is arranged on the outer side surface of the cylindrical column body (330), a second key-shaped reinforcing rib which is axially arranged is arranged on the inner side surface of the cylindrical column body (330), a first key slot which is used for being matched with the first key-shaped reinforcing rib (331) is arranged on the inner side surface of the central hole, and a second key slot (12) which is used for being matched with the second key-shaped reinforcing rib is arranged on the outer side surface of the central shaft (11);
when the gear (34), the cylindrical cylinder (330) and the central shaft (11) are sequentially sleeved in pairs, the first key-shaped reinforcing ribs (331) are bonded with the first key grooves, and the second key-shaped reinforcing ribs are bonded with the second key grooves (12), so that a sleeving mechanism formed by the gear (34), the cylindrical cylinder (330) and the central shaft (11) can stretch in the direction of the central axis of the gear (34).
6. The tunable cross-coupling structure of claim 2, wherein: the gear (34), the first rack (351) and the second rack (352) are all made of conductive materials, so that the first coupling rod (21) is electrically communicated with the second coupling rod (22).
7. The tunable cross-coupling structure of claim 2, wherein: the first coupling rod (21) and the second coupling rod (22) each comprise a rod body (231) and a reinforcing disc (232);
one end of the rod body part (231) is fixedly connected with the corresponding rack, the other end of the rod body part (231) is fixedly connected with the reinforcing disc (232), and the reinforcing disc (232) is always positioned on the outer side of the insulating box body (31).
8. The tunable cross-coupling structure of claim 1, wherein: the end face of the rotary adjusting end is provided with an adjusting groove (13), wherein the adjusting groove (13) is a straight groove, a cross groove, an inner hexagonal groove or an inner hexagonal groove.
9. A cavity filter, characterized in that: the tunable cross-coupling structure comprises the tunable cross-coupling structure of any one of claims 1 to 8, and further comprises a filter box body (100) and a filter cover plate (200), wherein a plurality of resonant cavities (300) are arranged in the filter box body (100), and notches (400) are arranged on cavity walls, which are positioned between two adjacent resonant cavities, in the plurality of resonant cavities (300);
the filter cover plate (200) is arranged at the top of the filter box body (100) and covers the filter box body to form a filter cavity;
the adjustable cross coupling structure is installed in the notch (400), wherein a rotation adjusting end of the adjusting driving rod (1) penetrates through the filter cover plate (200) and is located on the outer side of the filter cover plate (200), the first coupling rod (21) is suspended in a first resonant cavity of the two adjacent resonant cavities, and the second coupling rod (22) is suspended in a second resonant cavity of the two adjacent resonant cavities.
10. The cavity filter of claim 9, wherein: the adjusting drive rod (1) is provided with threads on the outer peripheral surface and can be locked and fixed on the filter cover plate (200) through a nut (500) and/or a screw hole in the filter cover plate (200), wherein the nut (500) is positioned on the outer side of the filter cover plate (200).
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| CN202023045073.2U CN213905570U (en) | 2020-12-16 | 2020-12-16 | Adjustable cross coupling structure and cavity filter |
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| CN202023045073.2U CN213905570U (en) | 2020-12-16 | 2020-12-16 | Adjustable cross coupling structure and cavity filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114243239A (en) * | 2021-11-30 | 2022-03-25 | 南京沁智电子科技有限公司 | Cavity filter and cross coupling structure thereof |
| CN117712655A (en) * | 2024-02-05 | 2024-03-15 | 成都宇恒博电子科技有限公司 | Filter with coupling adjustment mechanism |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114243239A (en) * | 2021-11-30 | 2022-03-25 | 南京沁智电子科技有限公司 | Cavity filter and cross coupling structure thereof |
| CN117712655A (en) * | 2024-02-05 | 2024-03-15 | 成都宇恒博电子科技有限公司 | Filter with coupling adjustment mechanism |
| CN117712655B (en) * | 2024-02-05 | 2024-04-26 | 成都宇恒博电子科技有限公司 | Filter with coupling adjustment mechanism |
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