CN113140879A - Non-cross coupling self-zero filter - Google Patents
Non-cross coupling self-zero filter Download PDFInfo
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- CN113140879A CN113140879A CN202110488823.3A CN202110488823A CN113140879A CN 113140879 A CN113140879 A CN 113140879A CN 202110488823 A CN202110488823 A CN 202110488823A CN 113140879 A CN113140879 A CN 113140879A
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- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
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Abstract
The embodiment of the application discloses a non-cross coupling self-zero filter, which comprises a resonant cavity and a plurality of stand columns; the plurality of upright posts are arranged in the resonant cavity in a mutually parallel and spaced mode along the left-to-right direction; the top of each upright post is provided with an inverted U-shaped structural part; the horizontal part of the U-shaped structural part is connected to the top of the upright post, so that the left vertical part and the right vertical part are respectively positioned at the left side and the right side of the corresponding upright post; and the U-shaped structural member is not contacted with the inner wall of the resonant cavity. The non-cross-coupling self-zero filter provided by the embodiment of the application can control and change coupling among all levels by arranging the U-shaped structural member, and adjust electric coupling and magnetic coupling distribution to generate a transmission zero point; and single-row self-coupling is adopted to generate transmission zero points, so that flying rods or flying wires are avoided, the stability is improved, and each channel adopts a compact single-row structure, so that the volume and the weight can be reduced by more than 30%. The filter has the advantages of small volume, high Q value and far parasitic passband.
Description
Technical Field
The application relates to the technical field of filter correlation, in particular to a non-cross-coupling self-zero filter.
Background
In the prior art, a filter is usually designed to use cross coupling to increase a transmission zero point through a flying rod or a flying wire so as to meet the requirements of small volume and high suppression degree. However, the flying rod or flying wire has poor stability, and a wide frequency band is difficult to realize, and cannot satisfy a severe use environment such as military communication.
Disclosure of Invention
In view of the deficiencies of the prior art, the present application provides a non-cross-coupled self-zero filter.
The non-cross-coupled self-zero filter may include a resonant cavity and a plurality of posts; the plurality of upright posts are arranged in the resonant cavity in a mutually parallel and spaced mode along the left-to-right direction; the bottoms of the columns are connected to the bottom of the resonant cavity, and the rest parts of the columns are not in contact with the inner wall of the resonant cavity; the top of each upright post is provided with an inverted U-shaped structural part; the U-shaped structural part comprises a horizontal part, a left vertical part and a right vertical part; the left vertical part and the right vertical part are respectively vertically arranged at the left end and the right end of the horizontal part; the horizontal part of the U-shaped structural part is connected to the top of the upright post, so that the left vertical part and the right vertical part are respectively positioned on the left side and the right side of the corresponding upright post; and the U-shaped structural member is not in contact with the inner wall of the resonant cavity.
According to some preferred embodiments of the present application, the plurality of uprights includes a left upright, a plurality of middle uprights, and a right upright; the left upright post, the plurality of middle upright posts and the right upright post are arranged in the resonant cavity in a mutually parallel and spaced mode along the direction from left to right.
According to some preferred embodiments of the present application, the U-shaped structural member comprises a first U-shaped structural member and a second U-shaped structural member; the height of a left vertical part in the first U-shaped structural member is smaller than that of a right vertical part in the first U-shaped structural member; the heights of the left vertical part and the right vertical part in the second U-shaped structural part are the same; the top parts of the left upright post and the middle upright post adjacent to the left upright post are respectively provided with one first U-shaped structural part; the left upright column and the first U-shaped structural part at the top of the middle upright column adjacent to the left upright column are arranged in a mirror image mode; the top parts of the right upright post and the middle upright post adjacent to the right upright post are respectively provided with one first U-shaped structural part; and the right upright post and the first U-shaped structural part at the top of the middle upright post adjacent to the right upright post are arranged in a mirror image mode.
According to some preferred embodiments of the present application, the first U-shaped structural member of the top portion of the left upright is arranged in a mirror image with the first U-shaped structural member of the top portion of the right upright.
According to some preferred embodiments of the present application, the height of the left vertical portion and the right vertical portion in the second U-shaped structural member is equal to the height of the left vertical portion in the first U-shaped structural member or the height of the right vertical portion in the first U-shaped structural member.
According to some preferred embodiments of the present application, a first input access member is provided at a left end of the resonant cavity; one end of the first input in-out component is arranged outside the resonant cavity, and the other end of the first input in-out component is connected with the left upright post; a second input and output part is arranged at the right end of the resonant cavity; one end of the second input in-out component is arranged outside the resonant cavity, and the other end of the second input in-out component is connected with the right upright post.
According to some preferred embodiments of the present application, a first adjusting screw is disposed at a position corresponding to the U-shaped structural member at the top of the resonant cavity.
According to some preferred embodiments of the present application, a second tuning screw is disposed at a position corresponding to a position between two adjacent pillars at the bottom of the resonant cavity.
According to some preferred embodiments of the present application, the resonant cavity includes a frame, a first cover plate, and a second cover plate; the frame body is provided with a first opening side and a second first opening side; the first open side and the second first open side are two opposite sides of the frame; the first cover plate and the second cover plate are covered on the first opening side and the second first opening side of the frame body through threaded connectors or in a welding mode to form the resonant cavity.
According to some preferred embodiments of the present application, the resonant cavity is a metal cavity; the stand with U type structure is the metalwork.
Compared with the prior art, the non-cross-coupling self-zero filter has the following beneficial effects:
the non-cross-coupling self-zero filter provided by the embodiment of the application can control and change coupling among all levels by arranging the U-shaped structural member, and adjust electric coupling and magnetic coupling distribution to generate a transmission zero point; and single-row self-coupling is adopted to generate transmission zero points, so that flying rods or flying wires are avoided, the stability is improved, and each channel adopts a compact single-row structure, so that the volume and the weight can be reduced by more than 30%. The filter has the advantages of small volume, high Q value and far parasitic passband.
Additional features of the present application will be set forth in part in the description which follows. Additional features of some aspects of the present application will be apparent to those of ordinary skill in the art in view of the following description and accompanying drawings, or in view of the production or operation of the embodiments. The features disclosed in this application may be realized and attained by practice or use of various methods, instrumentalities and combinations of the specific embodiments described below.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. Like reference symbols in the various drawings indicate like elements. Wherein the content of the first and second substances,
FIGS. 1 and 2 are schematic structural diagrams of resonant cavities in a non-cross-coupled self-zero filter according to some embodiments of the present application;
FIG. 3 is a schematic diagram of a non-cross-coupled, self-nulling filter with a first cover plate removed, according to some embodiments of the present application;
FIG. 4 is a cross-sectional view A-A of FIG. 1;
fig. 5 is a sectional view taken along line B-B in fig. 1.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that if the terms "first", "second", etc. are used in the description and claims of this application and in the above-described drawings, they are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, if the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, if the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", etc. are referred to, their indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, in this application, the terms "mounted," "disposed," "provided," "connected," "sleeved," and the like should be construed broadly if they are referred to. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The embodiment of the application discloses a non-cross-coupling self-zero filter.
As shown in fig. 1 and 2, the non-cross-coupled self-zero filter may include a resonant cavity 100, a plurality of posts, and a plurality of U-shaped structural members.
For example, as shown in fig. 2 and 4, the resonant cavity 100 may include a frame 110, a first cover plate 120, and a second cover plate 130. The frame body 110 has a first opening side 111 and a second first opening side 112. The first opening side 111 and the second first opening side 112 are two opposite sides of the frame body 110. The first cover plate 120 and the second cover plate 130 are covered on the first opening side 111 and the second first opening side 112 of the frame 110 by screw connectors to form the resonant cavity 100. The frame 110, the first cover plate 120, and the second cover plate 130 are all made of metal, so that the resonant cavity 100 is formed as a metal cavity.
Specifically, as shown in fig. 2, a plurality of connection through holes 510 are provided in each of the frame body 110, the first cover plate 120, and the second cover plate 130. In the connected state, a screw connector (bolt and nut, screw, etc.) passes through the connecting through hole 510 at the corresponding position on the frame body 110, the first cover plate 120 and the second cover plate 130 to fix the first cover plate 120 and the second cover plate 130 at both sides of the opening of the frame body 110, thereby forming the resonant cavity 100.
In addition, the first cover plate 120 and the second cover plate 130 may be welded to cover the first opening side 111 and the second opening side 112 of the frame 110, so as to form the resonant cavity 100.
Illustratively, as shown in fig. 2, the pillar may be made of a metal plate, a metal sheet, or a rectangular parallelepiped metal member, so that the pillar is formed as a metal pillar.
In the connected state, as shown in fig. 2 and 3, the plurality of pillars are arranged in the resonant cavity 100 in a parallel and spaced manner from each other in the left-to-right direction. Moreover, the bottoms of the pillars are all connected to the bottom of the resonant cavity 100, and the rest of the pillars do not contact with the inner wall of the resonant cavity 100, as shown in fig. 4 and 5.
Illustratively, as shown in fig. 3, the U-shaped structural member may include a horizontal portion 311, a left vertical portion 312, and a right vertical portion 313. A left vertical portion 312 and a right vertical portion 313 are vertically provided at left and right ends of the horizontal portion 311, respectively. Wherein, the U type structure is the metalwork.
In the connected state, as shown in fig. 3 to 5, an inverted U-shaped structural member is provided at the top of each of the columns. Wherein the horizontal portion 311 of the U-shaped structural member is connected to the top of the pillar such that the left and right vertical portions 312 and 313 are located at the left and right sides of the corresponding pillar, respectively. Also, the U-shaped structural member does not contact the inner wall of the resonant cavity 100.
In addition, a first input/output member (not shown) is provided at the left end of the cavity 100. One end of the first input access unit is disposed outside the cavity 100, and the other end is connected to the left pillar 210. Specifically, as shown in fig. 5, a first input access member mounting hole 520 is provided at the left end of the housing 110 of the resonator 100, and the first input access member is mounted in the first input access member mounting hole 520. Illustratively, the first input access feature may be in a two-conductor or multi-conductor configuration. For example, a coaxial structure or a microstrip structure may be employed.
Further, a second input/output member (not shown) may be disposed at the right end of the cavity 100. One end of the second input access unit is disposed outside the cavity 100, and the other end is connected to the right pillar 230. Specifically, as shown in fig. 5, a second input/output member mounting hole 530 is provided at the right end of the housing 110 of the resonator 100, and the second input/output member is mounted in the second input/output member mounting hole 530. Illustratively, the second input access feature may be in a two-conductor or multi-conductor configuration. For example, a coaxial structure or a microstrip structure may be employed.
In addition, a first adjusting screw (not shown) is disposed at the top of the resonant cavity 100 corresponding to the U-shaped structural member. Specifically, as shown in fig. 5, a plurality of first tuning screw installation holes 540 are provided at the top of the frame 110 of the resonant cavity 100, and each first tuning screw installation hole 540 corresponds to the top position of one U-shaped structural member. The first set screw is mounted in the first set screw mounting hole 540. A first tuning screw may extend into the resonant cavity 100.
Further, in some embodiments, a second tuning screw is disposed at a position corresponding to a position between two adjacent pillars on the bottom of the resonant cavity 100. Specifically, as shown in fig. 5, a plurality of second tuning screw mounting holes 550 are provided at the bottom of the frame 110 of the resonant cavity 100, and each second tuning screw mounting hole 550 is correspondingly provided at a position between two adjacent pillars. The second set screw is mounted in the second set screw mounting hole 550. A second tuning screw may extend into the resonant cavity 100.
Further, in some embodiments, as shown in fig. 3, 4, and 5, the plurality of uprights includes a left upright 210, a plurality of center uprights 220, and a right upright 230. The left pillar 210, the plurality of middle pillars 220, and the right pillar 230 are arranged in parallel and spaced from each other in a left-to-right direction within the resonant cavity 100.
The U-shaped structure includes a first U-shaped structure 310 and a second U-shaped structure 320. The height of the left vertical portion 312 of the first U-shaped structural member 310 is smaller than the height of the right vertical portion 313 of the first U-shaped structural member 310. The left and right vertical portions 312 and 313 of the second U-shaped structural member 320 have the same height.
The top of the left upright column 210 and the top of the middle upright column 220 adjacent to the left upright column 210 are respectively provided with a first U-shaped structural member 310. And, left upright 210 and first U-shaped structural member 310 at the top of center upright 220 adjacent to left upright 210 are mirror images.
A first U-shaped structural member 310 is disposed at the top of each of the right upright 230 and the middle upright 220 adjacent to the right upright 230. Also, right upright 230 and first U-shaped structural member 310 at the top of center upright 220 adjacent to right upright 230 are mirror images.
The first U-shaped structural member 310 at the top of the left upright 210 is a mirror image of the first U-shaped structural member 310 at the top of the right upright 230.
In addition, the height of the left and right vertical portions 312 and 313 in the second U-shaped structural member 320 is equal to the height of the left and right vertical portions 312 and 313 in the first U-shaped structural member 310 and 310.
By adopting the technical means, the non-cross-coupling self-zero filter provided by the embodiment of the application can control and change coupling among all levels by arranging the U-shaped structural member, and adjust electric coupling and magnetic coupling distribution to generate a transmission zero point; and single-row self-coupling is adopted to generate transmission zero points, so that flying rods or flying wires are avoided, the stability is improved, and each channel adopts a compact single-row structure, so that the volume and the weight can be reduced by more than 30%. The filter has the advantages of small volume, high Q value and far parasitic passband.
It should be noted that all of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
In addition, the above-described embodiments are exemplary, and those skilled in the art, having benefit of this disclosure, will appreciate numerous solutions that are within the scope of the disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.
Claims (10)
1. A non-cross-coupled self-zero filter, comprising a resonant cavity (100) and a plurality of posts;
the columns are arranged in the resonant cavity (100) in a mutually parallel and spaced mode along the left-to-right direction; the bottoms of the columns are all connected to the bottom of the resonant cavity (100), and the rest parts of the columns are not in contact with the inner wall of the resonant cavity (100);
the top of each upright post is provided with an inverted U-shaped structural part;
wherein the U-shaped structural member comprises a horizontal portion (311), a left vertical portion (312) and a right vertical portion (313); the left vertical portion (312) and the right vertical portion (313) are vertically disposed at left and right ends of the horizontal portion (311), respectively; the horizontal part (311) of the U-shaped structural part is connected to the top of the upright column, so that the left vertical part (312) and the right vertical part (313) are respectively positioned at the left side and the right side of the corresponding upright column;
and the U-shaped structural member is not in contact with the inner wall of the resonant cavity (100).
2. The non-cross-coupled self-zero filter of claim 1, wherein the plurality of posts comprises a left post (210), a plurality of middle posts (220), and a right post (230);
the left upright column (210), the plurality of middle upright columns (220) and the right upright column (230) are arranged in the resonant cavity (100) in a mutually parallel and spaced manner along the left-to-right direction.
3. The non-cross-coupled self-zero filter of claim 2, wherein the U-shaped structure comprises a first U-shaped structure (310) and a second U-shaped structure (320);
the height of a left vertical part (312) in the first U-shaped structural member (310) is smaller than the height of a right vertical part (313) in the first U-shaped structural member (310);
the heights of the left vertical part (312) and the right vertical part (313) in the second U-shaped structural part (320) are the same;
the top parts of the left upright post (210) and the middle upright post (220) adjacent to the left upright post (210) are respectively provided with one first U-shaped structural part (310); the left upright post (210) and the first U-shaped structural part (310) at the top of the middle upright post (220) adjacent to the left upright post (210) are arranged in a mirror image mode;
the top parts of the right upright post (230) and the middle upright post (220) adjacent to the right upright post (230) are respectively provided with one first U-shaped structural part (310); and the first U-shaped structural part (310) on the top of the right upright post (230) and the middle upright post (220) adjacent to the right upright post (230) are arranged in a mirror image mode.
4. The non-cross-coupled self-zero filter of claim 3, wherein the first U-shaped structural member (310) at the top of the left upright (210) is a mirror image of the first U-shaped structural member (310) at the top of the right upright (230).
5. The non-cross-coupled self-zero filter of claim 3, characterized in that the height of the left (312) and right (313) vertical portion in the second U-shaped structure (320) is equal to the height of the left (312) vertical portion in the first U-shaped structure (310) or the right (313) vertical portion in the first U-shaped structure (310).
6. The non-cross-coupled self-zero filter according to claim 2, wherein a first input access component is provided at the left end of the resonator (100); one end of the first input access part is arranged outside the resonant cavity (100), and the other end of the first input access part is connected with the left upright post (210);
a second input and output part is arranged at the right end of the resonant cavity (100); one end of the second input access part is arranged outside the resonant cavity (100), and the other end of the second input access part is connected with the right upright post (230).
7. The non-cross-coupled self-zero filter according to claim 1, wherein a first tuning screw is provided at a position corresponding to the U-shaped structural member at the top of the resonant cavity (100).
8. The non-cross-coupled self-zero filter according to claim 1, wherein a second tuning screw is provided at the bottom of the resonant cavity (100) at a position corresponding to a position between two adjacent pillars, respectively.
9. The non-cross-coupled self-zero filter of one of claims 1 to 8, wherein the resonant cavity (100) comprises a frame (110), a first cover plate (120) and a second cover plate (130);
the frame body (110) has a first opening side (111) and a second first opening side (112); the first open side (111) and the second first open side (112) are two opposite sides of the frame (110);
the first cover plate (120) and the second cover plate (130) are covered on the first opening side (111) and the second opening side (112) of the frame body (110) through threaded connection or in a welding mode to form the resonant cavity (100).
10. The non-cross-coupled self-zero filter according to one of claims 1 to 8, characterized in that the resonant cavity (100) is a metal cavity; the stand with U type structure is the metalwork.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110488823.3A CN113140879A (en) | 2021-04-28 | 2021-04-28 | Non-cross coupling self-zero filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110488823.3A CN113140879A (en) | 2021-04-28 | 2021-04-28 | Non-cross coupling self-zero filter |
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| CN113140879A true CN113140879A (en) | 2021-07-20 |
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| CN202110488823.3A Pending CN113140879A (en) | 2021-04-28 | 2021-04-28 | Non-cross coupling self-zero filter |
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| WO2015113845A1 (en) * | 2014-01-31 | 2015-08-06 | Andrew Wireless Systems Gmbh | Microwave filter having a fine temperature drift tuning mechanism |
| CN212485513U (en) * | 2020-08-21 | 2021-02-05 | 成都迈林特科技有限公司 | Coaxial cavity filter interface structure and coaxial cavity filter |
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| EP2323214A1 (en) * | 2009-11-16 | 2011-05-18 | Alcatel Lucent | Device for filtering radio frequency signals, coaxial air cavity filter, and manufacturing method thereof |
| KR100976251B1 (en) * | 2009-12-31 | 2010-08-18 | 에이스웨이브텍(주) | Non-contacting cavity filter using for matching tuning bar |
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Application publication date: 20210720 |