CN215896649U - Novel structure band elimination filter - Google Patents
Novel structure band elimination filter Download PDFInfo
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- CN215896649U CN215896649U CN202122137803.XU CN202122137803U CN215896649U CN 215896649 U CN215896649 U CN 215896649U CN 202122137803 U CN202122137803 U CN 202122137803U CN 215896649 U CN215896649 U CN 215896649U
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Abstract
The utility model discloses a band elimination filter with a novel structure, which comprises a cavity, a cover plate and a connector, wherein connecting ports are arranged at two ends of the cavity, the cavity is connected with the connector through the connecting ports, and the cover plate is fixedly connected with the cavity through a plurality of fixing screws. According to the technical scheme, the through transmission line for realizing the electric connection of the two connecting ports is arranged in the cavity, the resonant cavities for generating transmission zero points and the coupling devices for adjusting the coupling strength are used, the resonant columns are arranged in each resonant cavity, the tuning screw is arranged above each resonant column, the frequency of the stop band is debugged, the coupling columns are arranged between each resonant column and the through transmission line, the coupling screws are arranged on the coupling columns, the coupling bandwidth of the stop band is debugged, and the high-performance band-stop filter can achieve good effects of narrow relative bandwidth, wide pass band and stop band bandwidths, high stop band rejection degree, small insertion loss and stable intermodulation.
Description
Technical Field
The utility model relates to the technical field of filters, in particular to a band-stop filter with a novel structure.
Background
With the continuous development of wireless communication technology, frequency resources are more and more tight, and various communication systems and communication modes are closer to each other or even staggered in frequency space, which brings high requirements on the anti-interference capability of each communication system to other systems. In order to pass the radio frequency microwave signal in a certain frequency band as small as possible, and to attenuate the out-of-band signal as large as possible, the function of the band-pass filter is realized. The commonly used duplexers and multiplexers or combiners are essentially an integration of the band pass filters, which are filters with very limited pass bands but very wide stop bands.
There is data to show that in some occasions, in order to discriminate spurious signals outside a certain frequency band, when the output signal of the system on the frequency band is strong, the spurious signal test is brought with great interference and cannot be carried out. At this time, a band-stop filter is used to greatly attenuate the strong signal in the limited frequency range, so that the spurious signals in the wide frequency range on both sides can pass through smoothly and be detected.
Chinese patent document CN107671414A discloses a "band elimination filter". Including the main cavity body, coupling piece and coupling screw rod, a plurality of metal resonant cavities are separated out through the partition wall to the main cavity body, metal resonant cavity's diapire is equipped with the metal resonance post respectively, the metal resonance post is erect and is put, each metal resonance post is parallel to each other, the partition wall is equipped with the coupling window, the coupling piece runs through the coupling window, the both ends of coupling piece are equipped with the stationary blade, the stationary blade passes through silver-plated fix with screw at metal resonant cavity's inner wall, above-mentioned coupling piece is located the intraoral position of window and is equipped with the extension, the extension is parallel with the metal resonance post, the coupling screw rod sets up in the window, the coupling screw rod is parallel with the metal resonance post. The technical scheme is difficult to realize effective regulation of the stop band frequency and the stop band bandwidth.
Disclosure of Invention
The utility model mainly solves the technical problem that the prior technical scheme is difficult to realize the effective adjustment of stopband frequency and stopband bandwidth, and provides a novel-structure band-stop filter.
The technical problem of the utility model is mainly solved by the following technical scheme: the utility model comprises a cavity, a cover plate and a connector, wherein two ends of the cavity are provided with connecting ports, the cavity is connected with the connector through the connecting ports, and the cover plate is fixedly connected with the cavity through a plurality of fixing screws. The cavity is internally provided with a straight-through transmission line for realizing the electric connection of two connecting ports, a resonant cavity for generating a transmission zero point and a coupling device for adjusting the coupling strength, the cavity is connected with the signal input and output end through a connector to realize the filtering of signals, the connector is 4.3-10-F in type, and the cover plate is fixed on the upper surface of the cavity to realize the sealing of the interior of the cavity and ensure the stability of the interior of the cavity.
Preferably, a through rod cavity is arranged between the connecting ports, and a through rod connected to realize the electrical connection of the two connecting ports is arranged in the through rod cavity. Two connection ports are connected between the through rods, and the two connection ports are electrically connected.
Preferably, a plurality of resonant cavities are arranged on one side of the through rod cavity, and the resonant cavities are uniformly distributed in parallel along the through rod cavity. The resonant cavities are uniformly arranged in parallel and used for generating transmission zero points.
Preferably, a resonant column is arranged in the resonant cavity, and a coupling column is arranged between the resonant column and the through rod. The resonance column is used for adjusting the frequency of the stop band, and the coupling column is used for adjusting the coupling strength, so that the adjustment of the bandwidth of the stop band is realized.
Preferably, the cover plate is provided with a resonant column debugging screw corresponding to the resonant column and a coupling column debugging screw corresponding to the coupling column. When the cover plate seals the inside of the cavity, the adjustment of the resonant column debugging screw rod and the coupling column debugging screw rod on the upper surface of the cover plate is realized.
Preferably, the through rod is supported and fixed by a medium. The band elimination filter is stable in structure, and finally intermodulation is stable.
The utility model has the beneficial effects that: the high-performance band-stop filter is characterized in that a through transmission line for realizing the electrical connection of two connecting ports, resonant cavities for generating transmission zero points and a coupling device for adjusting the coupling strength are arranged in the cavity, a resonant column is arranged in each resonant cavity, a tuning screw rod is arranged above each resonant column, the frequency of a band-stop band is debugged, a coupling column is arranged between each resonant column and the through transmission line, a coupling screw rod is also arranged on each coupling column, and the coupling bandwidth of the band-stop band is debugged.
Drawings
Fig. 1 is a top view of the present invention.
Fig. 2 is a top view of a cover plate of the present invention.
In the figure, 1 cavity, 2 cover plates, 3 connectors, 4 through rods, 5 resonant cavities, 6 resonant columns, 7 coupling columns, 8 connecting ports, 9 resonant column debugging screw rods, 10 coupling column debugging screw rods and 11 fixing screws.
Detailed Description
The technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings.
Example (b): the band elimination filter with the novel structure of the embodiment is shown in fig. 1 and comprises a cavity 1, a cover plate 2 and a connector 3, wherein connecting ports 8 are arranged at two ends of the cavity 1, the cavity 1 is connected with the connector 3 through the connecting ports 8, and the cover plate 2 is fixedly connected with the cavity 1 through a plurality of fixing screws 11. The cavity is internally provided with a straight-through transmission line for realizing the electric connection of two connecting ports, a resonant cavity for generating a transmission zero point and a coupling device for adjusting the coupling strength, the cavity is connected with the signal input and output end through a connector to realize the filtering of signals, the connector is 4.3-10-F in type, and the cover plate is fixed on the upper surface of the cavity to realize the sealing of the interior of the cavity and ensure the stability of the interior of the cavity.
A through rod cavity is arranged between the connecting ports 8, and a through rod 4 which is connected to realize the electrical connection of the two connecting ports 8 is arranged in the through rod cavity. Two connection ports are connected between the through rods, and the two connection ports are electrically connected. The through rod 4 is supported and fixed by a medium. The band elimination filter is stable in structure, and finally intermodulation is stable.
And a plurality of resonant cavities 5 are arranged on one side of the through rod cavity, and the resonant cavities 5 are uniformly arranged in parallel along the through rod cavity. The resonant cavities are uniformly arranged in parallel and used for generating transmission zero points. A resonant column 5 is arranged in the resonant cavity 5, and a coupling column 6 is arranged between the resonant column 5 and the through rod 4. The resonance column is used for adjusting the frequency of the stop band, and the coupling column is used for adjusting the coupling strength, so that the adjustment of the bandwidth of the stop band is realized. 11 resonance posts have the debugging screw rod corresponding upper cover plate, mainly are used for debugging stop band frequency, and 11 coupling posts have the debugging screw rod corresponding upper cover plate, mainly are used for debugging stop band bandwidth, carry out accurate emulation back through three-dimensional electromagnetic simulation software, and the actual product just can satisfy technical index through simple debugging.
As shown in fig. 2, a resonant column debugging screw 9 corresponding to the resonant column 5 and a coupling column debugging screw 10 corresponding to the coupling column 6 are provided on the cover plate 2. When the cover plate seals the inside of the cavity, the adjustment of the resonant column debugging screw rod and the coupling column debugging screw rod on the upper surface of the cover plate is realized.
The band-stop filter described in this application is of the indoor type, the connector type is 4.3-10-F, and intermodulation 160dBc @2 x 43dBm can be realized in actual production. The band-stop filter consists of 11 stages, the passband frequency: 50-1785MHz, 1920-.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.
Although the terms cavity, connector, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (6)
1. The utility model provides a novel structure band elimination filter, its characterized in that, includes cavity (1), apron (2) and connector (3), cavity (1) both ends are equipped with connection port (8), cavity (1) links to each other with connector (3) through connection port (8), apron (2) are through a plurality of set screw (11) and cavity (1) fixed connection.
2. The novel structure band elimination filter of claim 1, characterized in that a through rod cavity is arranged between the connection ports (8), and a through rod (4) for electrically connecting the two connection ports (8) is arranged in the through rod cavity.
3. The band-stop filter with novel structure according to claim 2, characterized in that a plurality of resonant cavities (5) are arranged on one side of the through rod cavity, and the resonant cavities (5) are uniformly arranged in parallel along the through rod cavity.
4. The band elimination filter with the novel structure according to claim 3, characterized in that a resonant column (6) is arranged in the resonant cavity (5), and a coupling column (7) is arranged between the resonant column (6) and the through rod (4).
5. The band elimination filter with the novel structure according to claim 4, characterized in that the cover plate (2) is provided with a tuning screw (9) corresponding to the resonant column (6) and a tuning screw (10) corresponding to the coupling column (7).
6. The new structure band elimination filter of claim 2, characterized in that, the straight-through rod (4) is fixed by medium support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122137803.XU CN215896649U (en) | 2021-09-06 | 2021-09-06 | Novel structure band elimination filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122137803.XU CN215896649U (en) | 2021-09-06 | 2021-09-06 | Novel structure band elimination filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215896649U true CN215896649U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122137803.XU Active CN215896649U (en) | 2021-09-06 | 2021-09-06 | Novel structure band elimination filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215896649U (en) |
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2021
- 2021-09-06 CN CN202122137803.XU patent/CN215896649U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A new Band-stop filter Effective date of registration: 20230719 Granted publication date: 20220222 Pledgee: Hangzhou Gaoxin Financing Guarantee Co.,Ltd. Pledgor: Hangzhou Ziguang Communication Technology Co.,Ltd. Registration number: Y2023330001520 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |