CN213243940U - Broadband filter for multi-signal transmission - Google Patents
Broadband filter for multi-signal transmission Download PDFInfo
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- CN213243940U CN213243940U CN202022467877.5U CN202022467877U CN213243940U CN 213243940 U CN213243940 U CN 213243940U CN 202022467877 U CN202022467877 U CN 202022467877U CN 213243940 U CN213243940 U CN 213243940U
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Abstract
The utility model discloses a many signal transmission's wide band wave filter, install the electric connector on the shell, be equipped with a plurality of mutual isolation's independent inner chamber in the shell, power signal filter circuit unit, communication signal filter circuit unit and digital signal filter circuit unit arrange different independent inner chambers in respectively, be equipped with respectively in the electric connector with power signal filter circuit unit, communication signal filter circuit unit and digital signal filter circuit unit correspond power signal contact pin, communication signal contact pin and the digital signal contact pin of being connected. The utility model discloses with power signal filter circuit unit, communication signal filter circuit unit and digital signal filter circuit unit all integrated on a wave filter and realize the electromagnetism isolation function between each unit through a plurality of independent inner chambers, showing the utilization efficiency that has improved electric connector, compare three independent wave filter general volume, weight, cost and all show and reduce, and can satisfy signal transmission stability and interference killing feature requirement.
Description
Technical Field
The present invention relates to a filter, and more particularly to a broadband filter for filtering and integrating multiple signals in a filter.
Background
According to the national civil or military airworthiness requirement, the electromagnetic compatibility design of the airborne equipment must meet the national relevant standard requirement, and in the airborne equipment, communication signals, digital signals and power signals are three common signals, and the three signals are weak in anti-interference capacity and strong in radiation interference.
At present, in order to solve the above problems, in the design process of the conventional filter, data transmission is generally performed on communication signals, digital signals and power signals through different electrical connectors, i.e., aviation plugs, to form three types of filters, so as to increase the physical distances of the three types of signals, thereby reducing mutual interference between space-radiated electromagnetic waves.
The disadvantages of the conventional filter described above are: the electric connector has low utilization rate, a plurality of filters, large overall volume, high cost and heavy weight; meanwhile, the traditional filter is generally medium-low frequency filtering, the frequency of the traditional filter is dozens of MHz, and the frequency is narrow, so that the application scene of the traditional filter is limited.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a broadband filter for multi-signal transmission, which integrates power signal filtering, digital signal filtering and communication signal filtering in the same filter.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a broadband filter for multi-signal transmission comprises a housing and a filter circuit unit arranged in the housing, the shell is provided with an electric connector, a contact pin is arranged in the electric connector, the inner end of the electric connector is connected with the input end of the filter circuit unit, a plurality of independent inner cavities which are isolated from each other are arranged in the shell, the filter circuit unit comprises a power signal filter circuit unit, a communication signal filter circuit unit and a digital signal filter circuit unit, the power signal filter circuit unit, the communication signal filter circuit unit and the digital signal filter circuit unit are respectively arranged in different independent inner cavities, and a power signal contact pin, a communication signal contact pin and a digital signal contact pin which are respectively and correspondingly connected with the power signal filter circuit unit, the communication signal filter circuit unit and the digital signal filter circuit unit are arranged in the electric connector.
Preferably, in order to more reasonably utilize the internal space of the housing and make the structures of the parts as compact as possible to reduce the overall volume, the bottom plate and the top plate of the housing are both parallel to the horizontal direction, the independent inner cavities include a first independent inner cavity, a second independent inner cavity, a third independent inner cavity, a fourth independent inner cavity and a fifth independent inner cavity, the electric connector is mounted on the bottom plate of the housing at a position close to the first end, the first independent inner cavity is arranged in the housing at a position at which the inner end of the electric connector is located, the second independent inner cavity and the third independent inner cavity are arranged above the first independent inner cavity and are transversely arranged, the fourth independent inner cavity is arranged in the housing at a lower part close to the second end, and the fifth independent inner cavity is arranged in the housing at an upper part close to the second end; the power signal filtering circuit unit comprises a common mode filtering circuit and a differential mode filtering circuit, the communication signal filtering circuit unit comprises a medium-low frequency communication signal filtering circuit, the digital signal filtering circuit unit comprises a medium-low frequency digital signal filtering circuit, the common mode filtering circuit is arranged in the fourth independent inner cavity, the input end of the common mode filtering circuit is connected with the inner end of the power signal contact pin, the differential mode filtering circuit is arranged in the fifth independent inner cavity, the input end of the differential mode filtering circuit is connected with the output end of the common mode filtering circuit, the medium-low frequency communication signal filtering circuit is arranged in the second independent inner cavity, the input end of the medium-low frequency communication signal filtering circuit is connected with the inner end of the communication signal contact pin, and the medium-low frequency digital signal filtering circuit is arranged in the third independent inner cavity, and the input end of the medium-low frequency.
As preferred, in order to facilitate a plurality of operations of working a telephone switchboard in each independent inner chamber, first independent inner chamber the independent inner chamber of second with the same end of the independent inner chamber of third all opens and installs first apron, the below opening of the independent inner chamber of fourth just installs the second apron, the top opening of the independent inner chamber of fifth just installs the third apron, on the curb plate of shell with the position that first independent inner chamber corresponds is equipped with the operation window and installs the fourth apron.
Further, in order to make the filter have wider frequency and wider application range, the power signal filtering circuit unit further comprises a first power signal radio frequency filtering circuit and a second power signal radio frequency filtering circuit, wherein the input end and the output end of the first power signal radio frequency filtering circuit are respectively connected with the inner end of the power signal contact pin and the input end of the common mode filtering circuit, the input end and the output end of the second power signal radio frequency filtering circuit are respectively connected with the output end of the common mode filtering circuit and the input end of the differential mode filtering circuit, the communication signal filtering circuit unit further comprises a communication signal radio frequency filtering circuit, the input end and the output end of the communication signal radio frequency filtering circuit are respectively connected with the inner end of the communication signal contact pin and the input end of the middle and low frequency communication signal filtering circuit, and the digital signal filtering circuit unit further comprises a digital signal radio frequency filtering circuit, the input end and the output end of the digital signal radio frequency filter circuit are respectively connected with the inner end of the digital signal contact pin and the input end of the medium and low frequency digital signal filter circuit.
Preferably, in order to make the structures of the radio frequency filter circuits and other circuits more compact as much as possible to reduce the overall size, the first power supply signal radio frequency filter circuit is disposed on a partition plate between the first independent inner cavity and the fourth independent inner cavity, the second power supply signal radio frequency filter circuit is disposed on a partition plate between the fourth independent inner cavity and the fifth independent inner cavity, the communication signal radio frequency filter circuit is disposed on a partition plate between the first independent inner cavity and the second independent inner cavity, and the digital signal radio frequency filter circuit is disposed on a partition plate between the first independent inner cavity and the third independent inner cavity.
The beneficial effects of the utility model reside in that:
the utility model integrates the power signal filter circuit unit, the communication signal filter circuit unit and the digital signal filter circuit unit on one filter and forms a plurality of independent inner cavities through isolation to realize the electromagnetic isolation function between the units, thereby obviously improving the utilization efficiency of the electric connector, obviously reducing the overall volume, weight and cost compared with three independent filters, and meeting the requirements of signal transmission stability and anti-interference capability; by integrating the radio frequency filter circuit and the middle and low frequency filter circuit on the same filter, the frequency of the filter is increased from dozens of MHz to dozens of GHz, and the frequency width is obviously increased.
Drawings
Fig. 1 is a perspective view of the broadband filter for multi-signal transmission according to the present invention before assembly, wherein a viewing angle is a top view;
fig. 2 is a second perspective view of the broadband filter for multi-signal transmission according to the present invention before assembly, wherein the viewing angle is a bottom view;
fig. 3 is a front view of the broadband filter for multi-signal transmission according to the present invention after assembly, in which a fourth cover plate is not shown;
fig. 4 is a left side view of the assembled broadband filter for multi-signal transmission according to the present invention, in which the first cover plate is not shown;
fig. 5 is an assembled top view of the broadband filter for multi-signal transmission according to the present invention, in which the components above the common mode filter circuit are not shown;
fig. 6 is a plan view of the broadband filter for multi-signal transmission according to the present invention after assembly, in which a third cover plate is not shown.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1-6, the broadband filter for multi-signal transmission according to the present invention comprises a housing 3 and a filter circuit unit disposed in the housing 3, wherein an electrical connector 8 is mounted on the housing 3, a contact pin (not shown) is disposed in the electrical connector 8, and the inner end of the contact pin is connected to the input end of the filter circuit unit, a plurality of isolated independent cavities are disposed in the housing 3, a bottom plate and a top plate of the housing 3 are parallel to the horizontal direction, the independent cavities include a first independent cavity 10, a second independent cavity 2, a third independent cavity 5, a fourth independent cavity 17 and a fifth independent cavity 13, the electrical connector 8 is mounted on the bottom plate of the housing 3 near the first end, the first independent cavity 10 is disposed in the housing 3 at the position of the inner end of the electrical connector 8, the second independent cavity 2 and the third independent cavity 5 are disposed above the first independent cavity 10 and arranged transversely, a fourth independent inner cavity 17 is arranged at the lower part close to the second end in the shell 3, a fifth independent inner cavity 13 is arranged at the upper part close to the second end in the shell 3, the same ends of the first independent inner cavity 10, the second independent inner cavity 2 and the third independent inner cavity 5 are all opened and provided with a first cover plate 1, the lower part of the fourth independent inner cavity 17 is opened and provided with a second cover plate 15, the upper part of the fifth independent inner cavity 13 is opened and provided with a third cover plate 9, and an operation window 11 and a fourth cover plate 14 are arranged at the position, corresponding to the first independent inner cavity 10, on the side plate of the shell 3; the filter circuit unit comprises a power signal filter circuit unit, a communication signal filter circuit unit and a digital signal filter circuit unit, the power signal filter circuit unit comprises a common-mode filter circuit 16, a differential-mode filter circuit 12, a first power signal radio frequency filter circuit 22 and a second power signal radio frequency filter circuit 23, the communication signal filter circuit unit comprises a medium-low frequency communication signal filter circuit 18 and a communication signal radio frequency filter circuit 20, the digital signal filter circuit unit comprises a medium-low frequency digital signal filter circuit 19 and a digital signal radio frequency filter circuit 21, the common-mode filter circuit 16 is arranged in a fourth independent inner cavity 17, the differential-mode filter circuit 12 is arranged in a fifth independent inner cavity 13, the first power signal radio frequency filter circuit 22 is arranged on a partition plate between the first independent inner cavity 10 and the fourth independent inner cavity 17, the second power signal radio frequency filter circuit 23 is arranged on a partition plate between the fourth independent inner cavity 17 and the fifth independent inner cavity 13, a middle and low frequency communication signal filter circuit 18 is arranged in the second independent inner cavity 2, a communication signal radio frequency filter circuit 20 is arranged on a partition plate between the first independent inner cavity 10 and the second independent inner cavity 2, a middle and low frequency digital signal filter circuit 19 is arranged in the third independent inner cavity 5, a digital signal radio frequency filter circuit 21 is arranged on the partition plate between the first independent inner cavity 10 and the third independent inner cavity 5, a power signal pin, a communication signal pin and a digital signal pin which are respectively and correspondingly connected with the power signal filter circuit unit, the communication signal filter circuit unit and the digital signal filter circuit unit are arranged in the electric connector 8, the input end and the output end of the first power signal radio frequency filter circuit 22 are respectively connected with the inner end of the power signal pin and the input end of the common mode filter circuit 16, and the input end and the output end of the second power signal radio frequency filter circuit 23 are respectively connected with the output end of the common mode filter circuit 16 and the input end of the And the output end of the differential mode filter circuit 12 is connected with the inner end of the power signal output interface 7 arranged on the third cover plate 9, the input end and the output end of the communication signal radio frequency filter circuit 20 are respectively connected with the inner end of the communication signal contact pin and the input end of the medium and low frequency communication signal filter circuit 18, the output end of the medium and low frequency communication signal filter circuit 18 is connected with the inner end of the communication signal output interface 4 arranged at the corresponding position on the shell 3, the input end and the output end of the digital signal radio frequency filter circuit 21 are respectively connected with the inner end of the digital signal contact pin and the input end of the medium and low frequency digital signal filter circuit 19, and the output end of the medium and low frequency digital signal filter circuit 19 is connected with the inner end of the digital signal output interface.
As shown in fig. 1-6, the working principle of the broadband filter for multi-signal transmission according to the present invention is as follows:
the power signal enters a first power signal radio frequency filter circuit 22 through an electric connector 8 to carry out first high-frequency filtering, then common-mode filtering is carried out through a common-mode filter circuit 16, second high-frequency filtering is carried out through a second power signal radio frequency filter circuit 23, common-mode filtering is carried out through a differential-mode filter circuit 12, and finally the filtered power signal is output through a power signal output interface 7 to realize the power signal filtering function.
The power signal enters the communication signal radio frequency filter circuit 20 through the electric connector 8 for high frequency filtering, then passes through the medium and low frequency communication signal filter circuit 18 for medium and low frequency filtering, and finally, the filtered communication signal is output through the communication signal output interface 4, so that the communication signal filtering function is realized.
The digital signal enters the digital signal radio frequency filter circuit 21 through the electric connector 8 to be filtered at high frequency, then is filtered at low and medium frequency through the low and medium frequency digital signal filter circuit 19, and finally, the filtered digital signal is output through the digital signal output interface 6, so that the digital signal filtering function is realized.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.
Claims (5)
1. The utility model provides a many signal transmission's wide band filter, includes the shell and arranges in filter circuit unit in the shell, install electric connector on the shell, be equipped with contact pin and its inner end in the electric connector with filter circuit unit's input is connected its characterized in that: be equipped with a plurality of mutual isolation's independent inner chamber in the shell, the filter circuit unit includes power signal filter circuit unit, communication signal filter circuit unit and digital signal filter circuit unit, power signal filter circuit unit communication signal filter circuit unit with the digital signal filter circuit unit is arranged the difference respectively independent inner chamber in, be equipped with in the electric connector respectively with power signal filter circuit unit communication signal filter circuit unit with the digital signal filter circuit unit corresponds power signal contact pin, communication signal contact pin and the digital signal contact pin of connecting.
2. The wideband filter for multiple signal transmission according to claim 1, wherein: the bottom plate and the top plate of the shell are parallel to the horizontal direction, the independent inner cavities comprise a first independent inner cavity, a second independent inner cavity, a third independent inner cavity, a fourth independent inner cavity and a fifth independent inner cavity, the electric connector is installed on the bottom plate of the shell and is close to the first end, the first independent inner cavity is arranged in the shell and is located at the position of the inner end of the electric connector, the second independent inner cavity and the third independent inner cavity are arranged above the first independent inner cavity and are transversely arranged, the fourth independent inner cavity is arranged at the lower part, close to the second end, in the shell, and the fifth independent inner cavity is arranged at the upper part, close to the second end, in the shell; the power signal filtering circuit unit comprises a common mode filtering circuit and a differential mode filtering circuit, the communication signal filtering circuit unit comprises a medium-low frequency communication signal filtering circuit, the digital signal filtering circuit unit comprises a medium-low frequency digital signal filtering circuit, the common mode filtering circuit is arranged in the fourth independent inner cavity, the input end of the common mode filtering circuit is connected with the inner end of the power signal contact pin, the differential mode filtering circuit is arranged in the fifth independent inner cavity, the input end of the differential mode filtering circuit is connected with the output end of the common mode filtering circuit, the medium-low frequency communication signal filtering circuit is arranged in the second independent inner cavity, the input end of the medium-low frequency communication signal filtering circuit is connected with the inner end of the communication signal contact pin, and the medium-low frequency digital signal filtering circuit is arranged in the third independent inner cavity, and the input end of the medium-low frequency.
3. The wideband filter for multiple signal transmission according to claim 2, wherein: the first independent inner chamber the independent inner chamber of second with the third independent inner chamber all open-ended and install first apron, the below opening of the independent inner chamber of fourth just installs the second apron, the top opening of the independent inner chamber of fifth just installs the third apron, on the curb plate of shell with the position that first independent inner chamber corresponds is equipped with operation window and installs the fourth apron.
4. The broadband filter of multiple signal transmissions according to claim 2 or 3, wherein: the power signal filtering circuit unit further comprises a first power signal radio frequency filtering circuit and a second power signal radio frequency filtering circuit, wherein the input end and the output end of the first power signal radio frequency filtering circuit are respectively connected with the inner end of the power signal contact pin and the input end of the common mode filtering circuit, the input end and the output end of the second power signal radio frequency filtering circuit are respectively connected with the output end of the common mode filtering circuit and the input end of the differential mode filtering circuit, the communication signal filtering circuit unit further comprises a communication signal radio frequency filtering circuit, the input end and the output end of the communication signal radio frequency filtering circuit are respectively connected with the inner end of the communication signal contact pin and the input end of the medium-low frequency communication signal filtering circuit, the digital signal filtering circuit unit further comprises a digital signal radio frequency filtering circuit, and the input end and the output end of the digital signal radio frequency filtering circuit are respectively connected with the inner end and the input end of the digital signal The input end of the medium and low frequency digital signal filter circuit is connected.
5. The wideband filter for multiple signal transmission according to claim 4, wherein: the first power signal radio frequency filter circuit is arranged on a partition plate between the first independent inner cavity and the fourth independent inner cavity, the second power signal radio frequency filter circuit is arranged on a partition plate between the fourth independent inner cavity and the fifth independent inner cavity, the communication signal radio frequency filter circuit is arranged on a partition plate between the first independent inner cavity and the second independent inner cavity, and the digital signal radio frequency filter circuit is arranged on a partition plate between the first independent inner cavity and the third independent inner cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022467877.5U CN213243940U (en) | 2020-10-30 | 2020-10-30 | Broadband filter for multi-signal transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022467877.5U CN213243940U (en) | 2020-10-30 | 2020-10-30 | Broadband filter for multi-signal transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213243940U true CN213243940U (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022467877.5U Active CN213243940U (en) | 2020-10-30 | 2020-10-30 | Broadband filter for multi-signal transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213243940U (en) |
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2020
- 2020-10-30 CN CN202022467877.5U patent/CN213243940U/en active Active
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