Ka-band cavity filter

Abstract

The utility model discloses a ka wave band cavity filter, which belongs to the technical field of cavity filters, and comprises a filter main body and two joints arranged on the side wall surface of the filter main body, at least two cavities including a head cavity and a tail cavity are arranged in the filter main body, and the head cavity and the tail cavity are respectively provided with a feed connector. First through holes penetrating through the inner side wall face and the outer side wall face of the filter body are formed in the inner side wall face of the head cavity and the inner side wall face of the tail cavity respectively, and glass insulators in the connector are arranged in the first through holes in a penetrating mode and connected with the feed connector. According to the utility model, the connector is electrically connected with the feed connector, so that the selection range of external interfaces of the filter is expanded, the adaptability of the filter is improved, and the filter has good application value.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cavity filter technical field, concretely relates to a ka wave band cavity filter. BACKGROUND

[0002] With the development of aerospace technology, the cavity filter has higher requirements on working frequency, performance stability, debuggability, miniaturization and light weight, and interface adaptability design, the existing ka filter is mostly waveguide interface, and the interface adaptability is relatively low, and the debuggability range is small.

[0003] Therefore, in order to better adapt to the development of aerospace technology, a new type of ka cavity filter is needed, which can realize microwave filtering in ka wave band, and has high interface adaptability and large debuggability range. UTILITARY MODEL

[0004] In view of one or more of the above defects or improvement requirements of the prior art, the utility model provides a ka wave band cavity filter, wherein the selection range of the external interface is expanded through the connection of the feed connector and the glass insulator, and the adaptability is improved.

[0005] To achieve the above object, the utility model provides a ka wave band cavity filter, which comprises a filter main body and two connectors arranged on the side wall surface of the filter main body, at least two cavities are arranged in the filter main body, including a first cavity and a tail cavity, and at least one intermediate cavity is not arranged or arranged between the two cavities, and the adjacent two cavities are communicated.

[0006] The first cavity and the tail cavity are respectively provided with a feed connector,

[0007] The inner side wall surface of the first cavity and the tail cavity is respectively provided with a first through hole penetrating the inner and outer side wall surfaces of the filter main body, and the glass insulator in the connector is arranged in the first through hole and connected with the feed connector.

[0008] As a further improvement of the utility model, when the number of cavities is N, the cavities are sequentially coded as No. 1 to No. N, the number of the first cavity is 1, the number of the tail cavity is N, and the size specifications of the two cavities with the number of N+1 are the same.

[0009] As a further improvement of the utility model, the arrangement mode of each cavity is one of single column arrangement, bending arrangement or ring arrangement.

[0010] As a further improvement of the utility model, the number of cavities is four, the four cavities are arranged in a square, the first cavity and the tail cavity are adjacent and communicated.

[0011] As a further improvement of the utility model, the filter main body comprises a seat body, a partition plate,

[0012] The seat body top is provided with a plurality of chamber grooves, and a communication groove is arranged between two adjacent chamber grooves; the partition plate is arranged on the seat body surface to separate the space in the chamber groove from the outside and form a chamber.

[0013] As a further improvement of the utility model, a connecting piece is arranged between the seat body and the partition plate to fixedly connect the seat body and the partition plate; the seat body surface and the partition plate are respectively provided with corresponding connecting holes, and the connecting piece is arranged in the two connecting holes.

[0014] As a further improvement of the utility model, the chamber groove bottom and the communication groove bottom are respectively provided with a tuning screw rod.

[0015] As a further improvement of the utility model, the partition plate is provided with a second through hole, so that the head of the tuning screw rod passes through the second through hole.

[0016] As a further improvement of the utility model, the side of the partition plate away from the seat body is further provided with a cover plate.

[0017] As a further improvement of the utility model, the feed connector is provided with a plug-in hole, and the glass insulator is arranged in the plug-in hole.

[0018] The above improvement technical features can be combined with each other as long as they do not conflict with each other.

[0019] Overall, compared with the prior art, the above technical scheme conceived by the utility model has the following beneficial effects:

[0020] (1) The ka band cavity filter of the utility model is provided with a feed connector in the first and last chambers, and the feed connector and the connector are plugged through the glass insulator, thereby improving the adaptability of the external interface, expanding the selection range of the external interface, and making it unnecessary to use a waveguide interface for the external interface, thereby having a larger adjustable range, so that the ka band cavity filter can meet more use scenarios.

[0021] (2) The ka band cavity filter of the utility model adjusts the setting position of the feed connector to adjust the feed position, so as to be suitable for different use environments.

[0022] (3) The ka band cavity filter of the utility model changes the cavity number and the arrangement mode of the cavities to change the performance of the filter itself, so as to meet different use scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1It is the overall structure of the ka wave band cavity filter in the embodiment of the utility model looks down on the map;

[0024] Figure 2 It is the inside structure of the ka wave band cavity filter in the embodiment of the utility model looks down on the map;

[0025] Figure 3 It is the inside structure of the ka wave band cavity filter in the embodiment of the utility model looks down on the map;

[0026] Figure 4 It is the inside structure of the ka wave band cavity filter in the embodiment of the utility model looks down on the map;

[0027] In all the drawings, same reference signs represent same technical features, specifically: 1, seat body;101, chamber groove;102, first connecting hole;2, cover plate;3, joint;301, glass insulator;4, partition;401, second connecting hole;5, tuning screw;6, feed connector. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further detailed with the drawings and examples.The specific examples described here are only used to explain the utility model, and are not used to limit the utility model.In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as there is no conflict.

[0029] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements indicated must have a particular orientation, structure and operation, so it cannot be understood as a limitation on the utility model.

[0030] In addition, the terms "first", "second" are only used for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0031] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "fix", and other terms should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element internal communication or two element interaction relationship, unless another definite limitation.For ordinary skilled person in the art, the above terms can be understood according to the specific meaning in the utility model.

[0032] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can be the first and second features directly contact, or the first and second features indirectly contact through intermediate medium.And, the first feature is "on", "above" and "on" the second feature can be the first feature is directly above or obliquely above the second feature, or just indicates that the first feature is higher than the second feature in horizontal height.The first feature is "under", "below" and "under" the second feature can be the first feature is directly below or obliquely below the second feature, or just indicates that the first feature is less than the second feature in horizontal height.

[0033] Embodiment:

[0034] The ka-band cavity filter in the preferred embodiment of the utility model is as shown in Figures 1-4 The filter main body is provided with at least two cavities, which are tuning cavities, including a first cavity and a tail cavity, and at least one intermediate cavity is arranged between the two first and tail cavities, or no intermediate cavity is arranged at all, the two adjacent cavities are communicated, and a feed connector 6 is further arranged in each of the first and tail cavities, and a first through hole is formed in the first and tail cavities to communicate the inside and outside of the filter main body, and the two connectors 3 are electrically connected to the two feed connectors 6 through the two first through holes.

[0035] Further, the filter main body includes a seat body 1 and a partition plate 4 arranged on the surface of the seat body 1, and at least two first recesses are formed in the top of the seat body 1 as cavity grooves 101, when the partition plate 4 is fixed on the surface of the seat body 1, the space in the cavity groove 101 is separated from the outside, thereby forming a cavity.Further preferably, a communication groove is arranged between the two adjacent cavity grooves 101 to communicate the two adjacent cavities.

[0036] Furthermore, the base body 1 and the partition 4 are fixed together via a connecting member. A plurality of first connecting holes 102 are provided on the top surface of the base body 1, and a second connecting hole 401 is also provided on the partition 4. The first connecting holes 102 and the second connecting holes 401 are provided in a one-to-one correspondence. Connectors are respectively inserted through the first connecting holes 102 and the second connecting holes 401 to achieve a fixed connection between the base body 1 and the partition 4. Further preferably, the connecting member is a bolt, the first connecting hole 102 is a screw hole, and the corresponding second connecting hole 401 is a stepped hole, with a large-diameter hole section disposed away from the base body 1 for accommodating a nut in the bolt, and a small-diameter hole section having a threaded structure inside, thereby achieving a fixed connection between the base body 1 and the partition 4.

[0037] Furthermore, the base 1 is provided with multiple tuning screws 5, which are located at the bottom of the chamber slot 101 and the bottom of the connecting slot. These tuning screws 5 are used to adjust the filter's operating frequency, port standing wave, and out-of-band suppression, among other parameters. The specific structure and location of these screws depend on the specific situation. Furthermore, preferably, the tuning screw 5 in the chamber slot 101 is located at the center of the slot bottom.

[0038] Furthermore, a plurality of second through holes are opened on the partition 4, and the second through holes are arranged corresponding to the tuning screw 5, so that the head of the tuning screw 5 away from the base body 1 is located on the side of the partition 4 away from the base body 1, that is, the head of the tuning screw 5 is exposed outside the tuning cavity.

[0039] Furthermore, a cover plate 2 is provided on the side of the partition plate 4 away from the base 1 to cover the head of the tuning screw 5 and protect the exposed head of the tuning screw 5. Furthermore, an upwardly extending annular structure is formed on the outer periphery of the base 1, and the cover plate 2 is fixedly connected to the annular structure, thereby protecting the various internal structures of the filter.

[0040] Furthermore, the feed connector 6 is disposed in the head and tail chambers. The feed connector 6 includes a metal housing and a dielectric disposed therein to ensure 50-ohm matching. The feed connector 6 has a plug hole, and the connector 3 includes a glass insulator 301. A corresponding first through hole is provided in the base body 1, allowing the glass insulator 301 to extend into the chamber and pass through the plug hole, thereby connecting the connector 3 to the feed connector 6. Furthermore, the position of the feed connector 6 can be adjusted according to different usage environments. The connector 3 is preferably a 2.92K connector.

[0041] Furthermore, the dimensions of the chambers correspond to each other. When the number of chambers is N, the chambers are numbered 1 to N, with the first chamber numbered 1 and the last chamber numbered N. The sum of the numbers N+1 indicates that the two chambers have the same dimensions. Furthermore, the chambers can be arranged in a variety of ways, including a single row arrangement, a curved arrangement, or a circumferential arrangement.

[0042] In one embodiment, the number of chambers is 6, and the chambers are arranged in sequence as chamber No. 1, chamber No. 2, chamber No. 3, chamber No. 4, chamber No. 5 and chamber No. 6, wherein the size specifications of chamber No. 1 (i.e. the first chamber) and chamber No. 6 (the tail chamber) are the same, the size specifications of chamber No. 2 and chamber No. 5 are the same, and the size specifications of chamber No. 3 and chamber No. 4 are the same. Further, the six chambers are arranged in a ring shape to form a hexagonal structure, and the same chambers are symmetrically arranged. Further, the size specifications of the three chambers of No. 1, No. 2 and No. 3 are not the same.

[0043] In another embodiment, the number of chambers is 5, and the chambers are arranged in sequence as chamber No. 1, chamber No. 2, chamber No. 3, chamber No. 4 and chamber No. 5, wherein the size specifications of chamber No. 1 (i.e. the first chamber) and chamber No. 5 (the tail chamber) are the same, the size specifications of chamber No. 2 and chamber No. 4 are the same, and chamber No. 3 is independently arranged and does not match other chambers. Further, the five chambers are arranged in a bent form, and chamber No. 3 is the bending point, so that the chambers are arranged in a triangular shape, and the distances between chamber No. 2 and chamber No. 4 and chamber No. 3 are the same, and the distances between chamber No. 1 and chamber No. 5 and chamber No. 3 are also the same, so that chamber No. 2 and chamber No. 3 are symmetrically arranged, and chamber No. 1 and chamber No. 5 are symmetrically arranged.

[0044] Further, as shown in Figure 3 、 4 The chambers are four, arranged in a ring shape to form a square, so that the two first and tail chambers are adjacent, and the two adjacent first and tail chambers are connected, and a corresponding tuning screw is arranged to increase a transmission zero point to meet the technical index of out-of-band suppression.

[0045] The utility model discloses a ka wave band cavity filter, which comprises a filter main body and two connectors arranged on the side wall surface of the filter main body, at least two chambers are formed in the filter main body, and the chambers comprise a first chamber and a tail chamber.

[0046] Those skilled in the art can understand that the above description is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A Ka-band cavity filter, characterized in that: The filter comprises a filter body and two joints provided on the side wall of the filter body, wherein at least two chambers are provided inside the filter body, including a first chamber and a tail chamber, and at least one intermediate chamber is provided between the two chambers, and adjacent chambers are connected; The first chamber and the tail chamber are respectively provided with a feed connector, The inner walls of the first cavity and the tail cavity are respectively provided with first through holes penetrating the inner and outer walls of the filter body. The glass insulator in the joint is passed through the first through holes and connected to the feed connector.

2. The Ka-band cavity filter according to claim 1, wherein: When the number of chambers is N, each chamber is numbered from 1 to N in sequence, the first chamber is numbered 1, the last chamber is numbered N, and the sum of the numbers is N+1, and the two chambers have the same size specifications.

3. The Ka-band cavity filter according to claim 2, wherein: The arrangement of the chambers is one of single row arrangement, bent arrangement or circumferential arrangement.

4. The Ka-band cavity filter according to claim 2, wherein: The number of the chambers is 4, and the four chambers are arranged in a square shape. The head chamber and the tail chamber are adjacent to each other and are connected.

5. The Ka-band cavity filter according to any one of claims 1 to 4, wherein: The filter body includes a base and a partition. A plurality of chamber grooves are provided on the top of the seat body, and a connecting groove is provided between two adjacent chamber grooves. The partition is provided on the surface of the seat body to separate the space inside the chamber groove from the outside to form a chamber.

6. The Ka-band cavity filter according to claim 5, wherein: A connecting piece is provided between the base body and the partition for fixedly connecting the base body and the partition. Corresponding connecting holes are respectively opened on the surface of the base body and the partition, and the connecting piece is respectively passed through the two connecting holes.

7. The Ka-band cavity filter according to claim 5, wherein: The bottom of the chamber groove and the bottom of the communicating groove are respectively provided with tuning screws.

8. The Ka-band cavity filter according to claim 7, wherein: The partition plate is provided with a second through hole, so that the head of the tuning screw passes through the second through hole.

9. The Ka-band cavity filter according to any one of claims 6 to 8, wherein: A cover plate is further provided on a side of the partition away from the base body.

10. The Ka-band cavity filter according to any one of claims 1 to 4, wherein: The feed connector is provided with a plug hole, and the glass insulator is passed through the plug hole.

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