CN211350916U - Waveguide port band-pass filter - Google Patents
Waveguide port band-pass filter Download PDFInfo
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- CN211350916U CN211350916U CN202020284438.8U CN202020284438U CN211350916U CN 211350916 U CN211350916 U CN 211350916U CN 202020284438 U CN202020284438 U CN 202020284438U CN 211350916 U CN211350916 U CN 211350916U
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- 238000006243 chemical reaction Methods 0.000 description 7
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Abstract
The utility model discloses a waveguide mouth band pass filter relates to wave filter technical field, has solved the problem that current band pass filter can not directly be connected with feed or high frequency joint. The waveguide port bandpass filter includes: the band-pass filter comprises a band-pass filter body, a first filter body and a second filter body, wherein the band-pass filter body forms a resonant cavity, two ends of the band-pass filter body are respectively provided with an input waveguide port and an output waveguide port, and the band-pass filter body, the input waveguide port and the output waveguide port are of an integrated structure; the cover plate is covered on the resonant cavity and fixedly connected with the band-pass filter body; a coaxial waveguide coupling structure located between the resonant cavity and the output waveguide port, the coaxial waveguide coupling structure comprising: a cavity forming a coaxial resonant cavity; the resonant column is positioned in the coaxial resonant cavity and is arranged coaxially with the coaxial resonant cavity; and the coupling piece is positioned on one side of the resonant column close to the output waveguide port. The utility model is used for the filtering outband signal.
Description
Technical Field
The utility model relates to a wave filter technical field especially relates to a waveguide mouth band-pass filter.
Background
The C wave band is a frequency band with the frequency of 4.0-8.0 GHz, and the 3400-4200 MHz wave band is the downlink frequency of the fixed satellite service of the original C wave band and is mainly used for receiving satellite earth station signals; the 3400-3600 MHz band is used for deploying a 5G (5th-Generation, fifth Generation mobile communication technology, 5G for short) system, and due to the fact that the transmitting power of a 5G base station is large, a Low Noise Amplifier (LNA) or a Low Noise Block (LNB) of an existing satellite earth station can generate saturation interference, and the LNA or the LNB can work in a non-linear region. In order to eliminate the interference problem of the 5G system to the satellite earth station, a band-pass filter is usually added between the feed source (waveguide of the satellite earth station) and the high frequency connector (LNA/LNB).
Generally, the interfaces of the feed source and the high-frequency connector are both in a waveguide port structure, and the interface of the band-pass filter is not in the waveguide port structure. In order to connect the band pass filter with the feed source and the high frequency connector, in the prior art, a switching structure is provided between the band pass filter and the feed source and between the band pass filter and the high frequency connector. The conversion structure between the band-pass filter and the high-frequency connector is also provided with a coupling structure, and the coupling structure is used for realizing signal conversion between the band-pass filter and the high-frequency connector.
In the prior art, the band-pass filter and the feed source or the high-frequency connector are connected in a mode of arranging a conversion structure between the band-pass filter and the feed source and between the band-pass filter and the high-frequency connector, so that the installation process is complex and the cost is high.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a waveguide mouth band pass filter has solved current band pass filter can not directly connect the problem with feed or high frequency, simultaneously, has promoted the interference killing feature that high frequency connects.
To achieve the above object, an embodiment of the present invention provides a waveguide port bandpass filter, including: the band-pass filter comprises a band-pass filter body, a resonant cavity and a filter body, wherein an input waveguide port and an output waveguide port are respectively arranged at two ends of the band-pass filter body; the cover plate is covered on the resonant cavity and fixedly connected with the band-pass filter body; coaxial waveguide coupling structure, lie in between resonant cavity and the output waveguide mouth, coaxial waveguide coupling structure includes: the cavity forms a coaxial resonant cavity; the resonant column is positioned in the coaxial resonant cavity and is arranged coaxially with the coaxial resonant cavity; and the coupling piece is positioned on one side of the resonant column close to the output waveguide port.
The embodiment of the utility model provides a waveguide mouth band pass filter, including the band pass filter body, the band pass filter has flange disk's input waveguide mouth and output waveguide mouth, moreover, band pass filter body and input waveguide mouth and output waveguide mouth integrated into one piece. The utility model discloses waveguide mouthful band-pass filter, input waveguide mouthful can be directly be connected with the feed, and output waveguide mouthful can be directly be connected with high frequency joint, need not set up transform structure between waveguide mouthful band-pass filter and feed and between waveguide mouthful band-pass filter and the high frequency joint, and the installation is simple, convenient. And a coaxial waveguide coupling structure is arranged between the resonant cavity and the output waveguide port and is used for realizing the conversion of the waveguide from a TE10 mode to a TEM mode. The coaxial waveguide coupling structure comprises a cavity, wherein the cavity forms a coaxial resonant cavity, and a resonant column is positioned in the coaxial resonant cavity, the resonant column and the coaxial resonant cavity are coaxially arranged, the Q value of the coaxial waveguide coupling structure is high, the microwave loss when microwaves pass through the waveguide port band-pass filter can be reduced, and meanwhile, the coaxial resonant cavity is small in size and light in weight, and the size and the weight of the waveguide port band-pass filter can be reduced. Optionally, the resonant column and the cavity are integrally manufactured and formed, the structure is simple, and the installation is convenient. The coaxial waveguide coupling structure further comprises a coupling piece located on one side, close to the output waveguide port, of the resonance column, the coupling piece is used for enabling the coaxial waveguide coupling structure to generate cross coupling, and then the waveguide port band-pass filter can generate a transmission zero point outside a band-pass, the suppression degree of the waveguide port band-pass filter is improved, the anti-interference capacity of the waveguide port band-pass filter is improved, and the anti-interference capacity of the high-frequency connector is improved.
Drawings
Fig. 1 is a schematic perspective view of a waveguide port bandpass filter according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a coaxial waveguide coupling structure according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of a coaxial waveguide coupling structure according to an embodiment of the present invention;
fig. 4 is a top view of a coaxial waveguide coupling structure according to an embodiment of the present invention;
fig. 5 is a cross-sectional view a-a of fig. 4.
Reference numerals
1-a band-pass filter body; 11-a resonant cavity; 12-input waveguide port; 13-output waveguide port; 14-mounting holes; 2-end cap; 3-a coaxial waveguide coupling structure; a cavity-31; 311-coaxial resonant cavity; 32-a resonant column; 33-a coupling tab; 331-a connecting portion; 332-coupling part.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and 2, an embodiment of the present invention provides a waveguide port bandpass filter, including: band-pass filter body 1, band-pass filter body 1 are formed with resonant cavity 11, and the both ends of band-pass filter body 1 are equipped with input waveguide mouth 12 and output waveguide mouth 13 respectively, and band-pass filter body 1 and input waveguide mouth 12 and output waveguide mouth 13 structure as an organic whole. The cover plate 2 is arranged on the resonant cavity 11 in a covering mode and is fixedly connected with the band-pass filter body 1, and optionally, the cover plate 2 is fixedly connected with the band-pass filter body 1 through screws. And the coaxial waveguide coupling structure 3 is positioned between the resonant cavity 11 and the output waveguide port 13, and the coaxial waveguide coupling structure 3 is used for realizing the conversion of the waveguide from the TE10 mode to the TEM mode. Referring to fig. 2, 3, 4 and 5, the coaxial waveguide coupling structure 3 includes: a cavity 31, the cavity 31 forming a coaxial resonant cavity 311; the resonant column 32 is positioned in the coaxial resonant cavity 311 and is coaxially arranged with the coaxial resonant cavity 311, and the resonant column 32 and the cavity 31 are integrally formed; and a coupling tab 33 located on the side of the resonant post 32 near the output waveguide port 13.
The embodiment of the utility model provides a waveguide mouth band pass filter, as shown in figure 1 and figure 2, including band pass filter body 1, band pass filter 1 has flange disk's input waveguide mouth 12 and output waveguide mouth 13, moreover, band pass filter body 1 and input waveguide mouth 12 and output waveguide mouth 13 integrated into one piece. Compared with the prior art, the utility model discloses waveguide mouthful band-pass filter, input waveguide mouthful 12 can be directly be connected with the feed, and output waveguide mouthful 13 can be directly be connected with high frequency joint, need not set up transform structure between waveguide mouthful band-pass filter and feed and between the waveguide mouthful band-pass filter high frequency joint, and the installation is simple and convenient. A coaxial waveguide coupling structure 3 is arranged between the resonant cavity 11 and the output waveguide port 13, and the coaxial waveguide coupling structure 3 is used for realizing the conversion of the waveguide from the TE10 mode to the TEM mode. Referring to fig. 3, in some embodiments, the coaxial waveguide coupling structure 3 includes: the cavity 31 and the cavity 31 form a coaxial resonant cavity 311, a resonant column 32 is arranged in the coaxial resonant cavity 311, the resonant column 32 and the coaxial resonant cavity 311 are coaxially arranged, the Q value of the coaxial waveguide coupling structure 3 is high, microwave loss when the microwave passes through the waveguide port band-pass filter is low, and meanwhile, the coaxial resonant cavity 311 is small in size and light in weight, so that the size and the weight of the waveguide port band-pass filter can be reduced. Optionally, referring to fig. 5, the resonant column 32 and the cavity 31 are integrally formed, so that the structure is simple and the installation is convenient. Coaxial waveguide coupling structure 3 is still including being located the coupling piece 33 that resonance post 32 is close to one side of output waveguide mouth 13, and coupling piece 33 is used for making coaxial waveguide coupling structure 3 produce cross coupling, and then waveguide mouth band pass filter can produce transmission zero outside the band-pass, promotes the degree of suppression of waveguide mouth band energy filter, and then promotes waveguide mouth band pass filter's interference killing feature, and then promotes the interference killing feature of high frequency joint. The embodiment of the utility model provides a waveguide mouth band-pass filter for connect feed and high frequency and connect, work is in the C wave band, can directly be connected with feed and high frequency joint, simple to operate, and the interference killing feature is strong, and the microwave loss when passing waveguide mouth band-pass filter is low.
It should be noted that, referring to GB 11450.6-89, in the present application, the waveguide port refers to a waveguide standard interface having a flange form, and the interface of the feed source and the high-frequency connector is a BJ40 type waveguide port; the connection of the waveguide port band-pass filter with the feed source means that the waveguide port band-pass filter is connected with a waveguide tube of the satellite earth station. The utility model discloses waveguide mouth band-pass filter for connect feed and high frequency and connect, consequently, input waveguide mouth 12 and output waveguide mouth 13 are BJ40 type flange disk's waveguide mouth. The reason that the band-pass filter is adopted between the feed source and the high-frequency joint instead of the waveguide filter is that the cost of adopting the band-pass filter is lower, and the band-pass filter can inhibit the 5G signals in the 3400-3600M wave band, so that the interference of a 5G system to the high-frequency joint is reduced.
In some embodiments, as shown in fig. 5, the coupling sheet 33 has an L-shaped structure, the coupling sheet 33 includes a connection portion 331 and a coupling portion 332, the connection portion 331 is fixedly connected to the bandpass filter body 1, the coupling portion 332 is located in the coaxial resonant cavity 311, and the coupling portion 332 is located on the side of the resonant column 32 close to the output waveguide port 13, the L-shaped coupling sheet 33 has a simple structure, and facilitates connection and fixation of the coupling sheet 33 and the cavity 31.
Example one
The embodiment of the utility model provides an in, as shown in figure 5, coupled plate 33 and band pass filter body 1 integrated into one piece, simple structure, the utility model discloses a waveguide mouth band pass filter's wholeness is good, and structural reliability is high, moreover, need not set up special connecting piece and connect coupled plate 33 and cavity 31.
Example two
The embodiment of the utility model provides an in, the independent machine-shaping of coupling piece 33, then with coupling piece 33 and cavity 31 fixed connection, it is optional, coupling piece 33 passes through screw and cavity 31 fixed connection. Compared with the first embodiment, the utility model discloses waveguide mouth band-pass filter, coupling piece 33 machine-shaping alone, coaxial waveguide coupling structure simple manufacture, the cost is lower.
Referring to fig. 1, a plurality of mounting holes 14 are uniformly formed in the circumferential direction of the input waveguide port 12 and the output waveguide port 13, and the mounting holes 14 are used for being connected and fixed with a feed source or a high-frequency connector. Mounting holes 14 on the circumferential direction of the input waveguide port 12 correspond to mounting holes on the feed source waveguide tube, and the input waveguide port 12 is fixedly connected with the feed source through bolts; the output waveguide port 13 is circumferentially provided with a mounting hole 14 corresponding to a mounting hole of the high-frequency connector, and the input waveguide port 12 is fixedly connected to the high-frequency connector by a bolt.
In some embodiments, a resonator, a flying bar and an adjusting screw are arranged in the resonant cavity 11 of the band-pass filter body 1; the resonant cavity 11 is used for realizing the conversion of the waveguide from the TE10 mode to the coaxial TEM mode, and simultaneously, suppressing the 5G signals in the 3400-3600M frequency band. The cover plate 2 is fixedly connected with the band-pass filter body 1 through screws, a plurality of screws are uniformly arranged along the circumferential direction of the cover plate 2, and the reliability of connection of the cover plate 2 and the band-pass filter body 1 is ensured.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A waveguide port bandpass filter, comprising:
the band-pass filter comprises a band-pass filter body, a resonant cavity and a filter body, wherein an input waveguide port and an output waveguide port are respectively arranged at two ends of the band-pass filter body, and the band-pass filter body, the input waveguide port and the output waveguide port are of an integrated structure;
the cover plate is covered on the resonant cavity and fixedly connected with the band-pass filter body;
a coaxial waveguide coupling structure located between the resonant cavity and the output waveguide port, the coaxial waveguide coupling structure comprising:
a cavity forming a coaxial resonant cavity;
the resonant column is positioned in the coaxial resonant cavity and is arranged coaxially with the coaxial resonant cavity;
and the coupling piece is positioned on one side of the resonant column close to the output waveguide port.
2. The waveguide port bandpass filter of claim 1, wherein the coupling sheet is of an L-shaped structure, the coupling sheet comprises a connecting portion and a coupling portion, the connecting portion is fixedly connected with the cavity, the coupling portion is located in the coaxial resonant cavity, and the coupling portion is located on one side of the resonant column close to the output waveguide port.
3. The waveguide port bandpass filter of claim 2, wherein the coupling tab is integrally formed with the cavity.
4. The waveguide port bandpass filter of claim 2, wherein the coupling sheet is formed separately and is fixedly connected to the cavity.
5. The waveguide port bandpass filter according to any one of claims 1 to 4, wherein a plurality of mounting holes are uniformly arranged in the circumferential direction of the input waveguide port and the output waveguide port.
6. The waveguide port band-pass filter according to claim 5, wherein a resonator, a fly rod and an adjusting screw are arranged in the resonant cavity; the cover plate is fixedly connected with the band-pass filter body through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020284438.8U CN211350916U (en) | 2020-03-09 | 2020-03-09 | Waveguide port band-pass filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020284438.8U CN211350916U (en) | 2020-03-09 | 2020-03-09 | Waveguide port band-pass filter |
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| CN211350916U true CN211350916U (en) | 2020-08-25 |
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| CN202020284438.8U Active CN211350916U (en) | 2020-03-09 | 2020-03-09 | Waveguide port band-pass filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112601057A (en) * | 2020-11-27 | 2021-04-02 | 浙江盛洋科技股份有限公司 | Anti 5G signal interference device that removes of C wave band |
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2020
- 2020-03-09 CN CN202020284438.8U patent/CN211350916U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112601057A (en) * | 2020-11-27 | 2021-04-02 | 浙江盛洋科技股份有限公司 | Anti 5G signal interference device that removes of C wave band |
| CN112601057B (en) * | 2020-11-27 | 2023-03-03 | 浙江盛洋科技股份有限公司 | Anti 5G signal interference device that removes of C wave band |
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