CN115377637A - Tunable cavity filter - Google Patents
Tunable cavity filter Download PDFInfo
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- CN115377637A CN115377637A CN202211176416.XA CN202211176416A CN115377637A CN 115377637 A CN115377637 A CN 115377637A CN 202211176416 A CN202211176416 A CN 202211176416A CN 115377637 A CN115377637 A CN 115377637A
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- cavity
- partition wall
- resonant
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- partition
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
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Abstract
The invention discloses a tunable cavity filter, which relates to the technical field of communication and comprises the following components: the cover plate is buckled with the cavity, and a connector is arranged on the side edge of the cavity; a first input port and a second input port are arranged on one side of the cavity, and a first output port and a second output port are arranged on the other side of the cavity; the first input port and the second input port are provided with a first connector and a second connector, and the first output port and the second output port are provided with a third connector and a fourth connector; a first partition wall, a second partition wall and a third partition wall are arranged in the cavity, and the first partition wall, the second partition wall and the third partition wall divide the cavity into a first cavity and a second cavity; a resonant disk is arranged on the resonant rod; the cover plate is provided with a mounting bolt, the cover plate is provided with a tuning screw rod, and the tuning screw rod is provided with a locking nut. The tuning screw arranged on the cover body is used for adjusting the resonant frequency of the signal in the filter cavity, so that the resonant characteristic of the filter is ensured.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a tunable cavity filter.
Background
In a mobile communication system, a desired signal is modulated to form a modulated signal, the modulated signal is carried on a high-frequency carrier signal, the modulated signal is transmitted to the air through a transmitting antenna, the signal in the air is received through a receiving antenna, and the signal received by the receiving antenna does not include the desired signal but also includes harmonics and noise signals of other frequencies. The signal received by the receiving antenna needs to be filtered by a filter to remove unnecessary harmonic and noise signals. Therefore, the designed filter must accurately control its upper and lower limit frequencies. And should also consider maintaining a high degree of isolation between the passbands of the channels if both transmit and receive channels are present.
The existing filter is not compact enough in arrangement structure, so that the size of the filter is large, the setting of a transmission zero point is not reasonable, the characteristics of out-of-band rejection and the like of a filter branch are poor, and the high isolation from signals outside a channel is difficult to achieve.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the tunable cavity filter.
In order to solve the technical problems, the invention provides the following technical scheme:
a tunable cavity filter, comprising:
the cover plate is buckled with the cavity, and a connector is arranged on the side edge of the cavity;
a first input port and a second input port are arranged on one side of the cavity, and a first output port and a second output port are arranged on the other side of the cavity;
the first input port and the second input port are provided with a first connector and a second connector, and the first output port and the second output port are provided with a third connector and a fourth connector;
the cavity is internally provided with a first partition wall, a second partition wall and a third partition wall, wherein partition ribs are arranged on the first partition wall, the second partition wall and the third partition wall, the first partition wall, the second partition wall and the third partition wall divide the cavity into a first cavity and a second cavity, the first cavity is divided into a plurality of resonant cavities through the first partition wall, the second partition wall and the partition ribs, the second cavity is divided into a plurality of resonant cavities through the second partition wall, the third partition wall and the partition ribs, a resonant rod is arranged at the center position in each resonant cavity, and a plurality of resonant rods are arranged among the resonant cavities; the resonant rods in the first cavity are connected through a connecting rod to form a first passage; the resonant rods in the second cavity are connected through a connecting rod to form a second passage;
a resonant disk is arranged on the resonant rod at the center position in the resonant cavity and is welded with the resonant rod;
the cover plate is provided with a mounting bolt, the cover plate is provided with a tuning screw rod, and the tuning screw rod is provided with a locking nut.
As a further technical scheme of the invention, mounting bosses with threaded holes are also arranged on two sides of the cavity.
According to a further technical scheme of the invention, mounting grooves are formed in the periphery of the cavity, and mounting screw holes are formed in the bottoms of the mounting grooves.
In a further aspect of the present invention, the first connector and the second connector, and the third connector and the fourth connector are 4.3-10 connectors.
According to a further technical scheme of the invention, a groove is formed in the upper side of the cavity, a protrusion matched with the groove is formed in the edge of the lower side of the cover plate, and the cover body is clamped with the cavity through the groove and the protrusion.
As a further technical scheme of the invention, mounting holes are arranged on the first partition wall, the second partition wall and the third partition wall; and the cover body is provided with a mounting bolt corresponding to the mounting hole in the partition wall.
According to a further technical scheme of the invention, reinforcing ribs are arranged between the first partition wall, the second partition wall and the third partition wall and the resonant rod.
The beneficial effects of the invention are:
1. the cavity is buckled with the cover plate, the cavity is divided into two passages through a partition wall, a first cavity is formed between the first partition wall and the second partition wall, a second cavity is formed between the second partition wall and the third partition wall, a resonant cavity is formed by arranging partition ribs, and resonant rods in the first cavity are connected through connecting rods to form a first passage; the resonant rods in the second cavity are connected through a connecting rod to form a second passage;
2. the resonance rod and the resonance disc are adjusted through the tuning screw rod to achieve frequency modulation, the locking nut is arranged on the tuning screw rod 202, and after adjustment and verification are completed, the tuning screw rod is fastened through the locking nut.
3. In order to facilitate the installation or fixation of the tunable cavity filter, installation bosses with threaded holes are arranged on two sides of the cavity and can be fixed through bolts, installation grooves are formed in the periphery of the cavity, and installation screw holes are formed in the bottom of the installation grooves.
4. The resonance rod is fixed at the bottom of the cavity through the connecting piece, and the tuning screw rod arranged on the cover body is used for adjusting the resonance frequency of signals in the filter cavity.
5. The resonant rods are connected through the connecting rod, the stress condition of the bottom of the cavity is improved through the reinforcing ribs in order to enhance the stress and strain capacity of the bottom of the cavity, the internal change of the cavity caused by the deformation of the bottom of the cavity is prevented, and the resonant characteristic of the tunable cavity filter is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a three-dimensional structure diagram of a tunable cavity filter according to the present invention;
FIG. 2 is a diagram of a split structure of the tunable cavity filter according to the present invention;
fig. 3 is a top view of the tunable cavity filter according to the present invention;
fig. 4 is a left side view of the tunable cavity filter according to the present invention;
fig. 5 is a front view of the tunable cavity filter according to the present invention;
reference numerals:
100-cavity, 200-cover plate, 300-connector, 400-partition wall, 500-first cavity, 600-second cavity and 700-resonance rod; 101-a first input port, 102-a second input port, 103-a first output port, 104-a second output port, 105-an installation boss, 106-a threaded hole, 107-an installation groove, 108-an installation screw hole and 109-a groove; 201-mounting bolt, 202-tuning screw rod, 203-locking nut; 301-a first connector, 302-a second connector, 302-a third connector, 304-a fourth connector; 401-first partition, 402-second partition, 403-third partition, 411-spacer bar, 412-mounting hole; 701-resonant disk.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to fig. 1 to 5, the tunable cavity filter includes:
the cover plate 200 is buckled with the cavity 100, and a connector 300 is arranged on the side edge of the cavity 100;
a first input port 101 and a second input port 102 are arranged on one side of the cavity 100, and a first output port 103 and a second output port 104 are arranged on the other side of the cavity 100; the structure is a double-input and double-output structure; a first connector 301 and a second connector 302 are arranged on the first input port 101 and the second input port 102, and a third connector 302 and a fourth connector 304 are arranged on the first output port 103 and the second output port 104;
the cavity is divided into two passages by the partition wall 400, specifically: a first partition wall 401, a second partition wall 402 and a third partition wall 403 are arranged in the cavity 100, the first partition wall 401, the second partition wall 402 and the third partition wall 403 divide the cavity into a first cavity 500 and a second cavity 600, the first partition wall and the second partition wall are arranged on the side edges of the cavity, the second partition wall is arranged in the middle of the cavity, a first cavity is formed between the first partition wall and the second partition wall, a second cavity is formed between the second partition wall and the third partition wall, partition ribs 411 are arranged on the first partition wall 401, the second partition wall 402 and the third partition wall 403, the first cavity 500 is divided into a plurality of resonant cavities through the first partition wall, the second partition wall and the partition ribs, the second cavity 600 is divided into a plurality of resonant cavities through the second partition wall 401, the third partition wall 403 and the partition ribs 411, namely the resonant cavities are formed through the partition ribs, a resonant rod 700 is arranged in the center of each resonant cavity, and a plurality of resonant rods are arranged on a passage between the resonant cavities; the resonant rods in the first cavity are connected through a connecting rod to form a first passage; the resonant rods in the second cavity are connected through a connecting rod to form a second passage;
a resonant disk 701 is arranged on the resonant rod 700 at the center of the resonant cavity, and the resonant disk 701 is welded with the resonant rod 700; the cover plate 200 is provided with a mounting bolt 201 for fixing with the cavity, the cover plate 200 is provided with a tuning screw 202, the tuning screw is used for adjusting the resonance rod and the resonance disc to realize frequency modulation, the tuning screw 202 is provided with a locking nut 203, and after the adjustment and verification are completed, the tuning screw is fastened through the locking nut.
In the embodiment of the present invention, in order to facilitate the installation or fixation of the tunable cavity filter, installation bosses 105 with threaded holes 106 are provided on both sides of the cavity 100, and can be fixed by bolts.
In the embodiment of the present invention, an installation groove 107 is disposed around the cavity 100, and an installation screw 108 is disposed at the bottom of the installation groove 107. The resonance rod is fixed at the bottom of the cavity through the connecting piece, and the tuning screw rod arranged on the cover body is used for adjusting the resonance frequency of signals in the filter cavity.
In an embodiment of the present invention, the first connector 301, the second connector 302, the third connector 303 and the fourth connector 304 are 4.3-10 connectors.
Wherein, the upside of cavity 100 sets up recess 109, the downside edge of apron 200 sets up the arch with recess 109 complex, and lid 200 passes through recess 109 and protruding joint with cavity 100.
Reinforcing ribs are provided between the first partition 401, the second partition 402, and the third partition 403 and the resonance bar 700. The resonant rods are connected through the connecting rod, the stress condition of the bottom of the cavity is improved through the reinforcing ribs in order to enhance the stress and strain capacity of the bottom of the cavity, the internal change of the cavity caused by the deformation of the bottom of the cavity is prevented, and the resonant characteristic of the tunable cavity filter is ensured.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A tunable cavity filter, comprising:
the cover plate is buckled with the cavity, and a connector is arranged on the side edge of the cavity;
a first input port and a second input port are arranged on one side of the cavity, and a first output port and a second output port are arranged on the other side of the cavity;
the first input port and the second input port are provided with a first connector and a second connector, and the first output port and the second output port are provided with a third connector and a fourth connector;
a first partition wall, a second partition wall and a third partition wall are arranged in the cavity, wherein partition ribs are arranged on the first partition wall, the second partition wall and the third partition wall, the first partition wall, the second partition wall and the third partition wall divide the cavity into a first cavity and a second cavity, the first cavity is divided into a plurality of resonant cavities through the first partition wall, the second partition wall and the partition ribs, the second cavity is divided into a plurality of resonant cavities through the second partition wall, the third partition wall and the partition ribs, a resonant rod is arranged at the center position in each resonant cavity, and a plurality of resonant rods are arranged between the resonant cavities; the resonant rods in the first cavity are connected through a connecting rod to form a first passage; the resonant rods in the second cavity are connected through a connecting rod to form a second passage;
a resonant disk is arranged on the resonant rod at the center position in the resonant cavity and is welded with the resonant rod;
the cover plate is provided with a mounting bolt, the cover plate is provided with a tuning screw rod, and the tuning screw rod is provided with a locking nut.
2. The tunable cavity filter of claim 1, wherein mounting bosses with threaded holes are further provided on both sides of the cavity.
3. The tunable cavity filter of claim 1, wherein mounting grooves are formed around the cavity, and mounting screw holes are formed at the bottom of the mounting grooves.
4. The tunable cavity filter of claim 1, wherein the first and second, third and fourth connectors are 4.3-10 connectors.
5. The tunable cavity filter of claim 1, wherein a groove is formed on the upper side of the cavity, a protrusion matched with the groove is formed on the lower side edge of the cover plate, and the cover body is clamped with the cavity through the groove and the protrusion.
6. The tunable cavity filter of claim 1, wherein mounting holes are provided on the first partition, the second partition, and the third partition; and the cover body is provided with a mounting bolt corresponding to the mounting hole on the partition wall.
7. The tunable cavity filter of claim 1, wherein reinforcing ribs are disposed between the first, second, and third walls and the resonant rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211176416.XA CN115377637A (en) | 2022-09-26 | 2022-09-26 | Tunable cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211176416.XA CN115377637A (en) | 2022-09-26 | 2022-09-26 | Tunable cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115377637A true CN115377637A (en) | 2022-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211176416.XA Pending CN115377637A (en) | 2022-09-26 | 2022-09-26 | Tunable cavity filter |
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| CN (1) | CN115377637A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100976251B1 (en) * | 2009-12-31 | 2010-08-18 | 에이스웨이브텍(주) | Non-contacting cavity filter using for matching tuning bar |
| CN201673989U (en) * | 2010-04-26 | 2010-12-15 | 南京斯坦德通信工程有限公司 | WLAN filter |
| WO2013117072A1 (en) * | 2012-02-08 | 2013-08-15 | 武汉凡谷电子技术股份有限公司 | Mid-frequency band high-power cavity filter |
| WO2016106635A1 (en) * | 2014-12-31 | 2016-07-07 | 深圳市大富科技股份有限公司 | Cavity filter, duplexer, signal transceiving apparatus, remote radio device, and tower mounted amplifier |
| CN208460938U (en) * | 2018-08-23 | 2019-02-01 | 湖南澳德信息科技有限公司 | A kind of dual-frequency channel merger |
| CN111509342A (en) * | 2020-05-29 | 2020-08-07 | 南京三石通信技术有限公司 | Miniaturized multichannel 5G anti-interference filter |
| CN114171865A (en) * | 2021-12-31 | 2022-03-11 | 大富科技(安徽)股份有限公司 | Filter |
| CN115101913A (en) * | 2022-07-25 | 2022-09-23 | 河北优圣通信科技有限公司 | Direct current coupler |
-
2022
- 2022-09-26 CN CN202211176416.XA patent/CN115377637A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100976251B1 (en) * | 2009-12-31 | 2010-08-18 | 에이스웨이브텍(주) | Non-contacting cavity filter using for matching tuning bar |
| CN201673989U (en) * | 2010-04-26 | 2010-12-15 | 南京斯坦德通信工程有限公司 | WLAN filter |
| WO2013117072A1 (en) * | 2012-02-08 | 2013-08-15 | 武汉凡谷电子技术股份有限公司 | Mid-frequency band high-power cavity filter |
| WO2016106635A1 (en) * | 2014-12-31 | 2016-07-07 | 深圳市大富科技股份有限公司 | Cavity filter, duplexer, signal transceiving apparatus, remote radio device, and tower mounted amplifier |
| CN208460938U (en) * | 2018-08-23 | 2019-02-01 | 湖南澳德信息科技有限公司 | A kind of dual-frequency channel merger |
| CN111509342A (en) * | 2020-05-29 | 2020-08-07 | 南京三石通信技术有限公司 | Miniaturized multichannel 5G anti-interference filter |
| CN114171865A (en) * | 2021-12-31 | 2022-03-11 | 大富科技(安徽)股份有限公司 | Filter |
| CN115101913A (en) * | 2022-07-25 | 2022-09-23 | 河北优圣通信科技有限公司 | Direct current coupler |
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