CN217935576U

CN217935576U - Filter

Info

Publication number: CN217935576U
Application number: CN202123118287.2U
Authority: CN
Inventors: 许记磊; 张和炎; 尹旭
Original assignee: Zhuhai Bojay Electronics Co Ltd
Current assignee: Zhuhai Bojay Electronics Co Ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-11-29
Anticipated expiration: 2031-12-13

Abstract

The utility model aims at providing a filter that shielding performance is good, compatible wide range and whole electrical continuity is good. The utility model discloses an upper cover, filtering interface module, shielding that connect gradually shake and fill up and lower cover, filtering interface module includes filtering module and two sets of interfaces, filtering module's earthing terminal with the upper cover is connected, and is two sets of the interface passes through filtering module electricity is connected, the upper cover with the lower cover at least one be provided with the mounting groove of interface looks adaptation, the upper cover with the surface of lower cover all is provided with conductive coating, the shielding shake be equipped with on the cloth with the incision of filtering interface module looks adaptation, the shielding shakes the cloth including connecting electrically conductive cloth of first electrically conductive cloth, electrically conductive sponge and second as an organic whole. The utility model discloses be applied to the technical field of radio frequency test.

Description

Filter

Technical Field

The utility model discloses be applied to the technical field of radio frequency test, in particular to wave filter.

Background

The test of consumer electronic products usually needs to use the radio frequency test system to test, the radio frequency test system is made up of shielding case and several subsystems, need to have and wait for the module such as power supply, transmission communication with the determinand during the test, need to adopt the electromagnetic interference of filtering the external world in order to guarantee communication and power supply quality. At present, the electromagnetic signal filtering module can only achieve 18GHz at most, and the filtering module with the millimeter wave frequency band is not available in the current domestic and foreign markets.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough, provide a filter that shielding performance is good, compatible wide range and whole electrical continuity is good.

The utility model adopts the technical proposal that: the utility model discloses an upper cover, filtering interface module, shielding that connect gradually shake and fill up and lower cover, filtering interface module includes filtering module and two sets of interfaces, filtering module's earthing terminal with the upper cover is connected, and is two sets of the interface passes through filtering module electricity is connected, the upper cover with the lower cover at least one be provided with the mounting groove of interface looks adaptation, the upper cover with the surface of lower cover all is provided with conductive coating, the shielding shake be equipped with on the cloth with the incision of filtering interface module looks adaptation, the shielding shakes the cloth including connecting electrically conductive cloth of first electrically conductive cloth, electrically conductive sponge and second as an organic whole.

According to the scheme, the upper cover and the lower cover are in a split structure, so that the parts can be processed and detected more easily. Through the upper cover with the surface setting of lower cover the conductive coating sets up simultaneously shielding vibration cloth conduct the upper cover with the connection buffer structure of lower cover makes through the electrically conductive cloth of integrated into one piece's first electrically conductive cloth, electrically conductive sponge and second the upper cover with the conductive coating of lower cover switches on mutually, and the cooperation will simultaneously the earthing terminal of filtering module with the upper cover is connected, and then ensures the electric connectivity between the part, improves shielding property. The shielding effectiveness is larger than or equal to 80dB in the frequency ranges from 700MHz to 6GHz and larger than or equal to 70dB in the frequency ranges from 6GHz to 44 GHz.

Preferably, the upper cover or the lower cover is provided with a cushion block matched with the filtering interface module.

According to the scheme, the buffer cushion block is arranged, so that the filter interface module is more stable and attached to the filter interface module.

In a preferred embodiment, the interface is a dc power interface, the interface includes a conductive core and a conductive sheet, the filtering module includes a first wire set and a second wire set, the conductive cores of the two interfaces are conducted through the first wire set, the conductive sheets of the two interfaces are conducted through the second wire set, and the first wire set and the second wire set are both provided with a plurality of first feedthrough capacitors.

According to the scheme, the current filtering of the first wire set and the second wire set is carried out through the first feedthrough capacitors, the shielding performance of more than or equal to 80Db in the 700MHz to 6GHz frequency band is realized, and the shielding performance of more than or equal to 70Db in the 6GHz to 44GHz frequency band is realized. And further, the direct current input of the maximum current 5A is provided for the devices in the shielding box at the working frequency of 700MHz-44 GHz.

According to a preferable scheme, the interface is an RJ45 network port, the filtering module comprises eight groups of transmission line groups and six groups of power supply filtering line groups, the two groups of interfaces are in communication connection through the transmission line groups, the two groups of interfaces supply power through the six groups of power supply filtering line groups, and the power supply filtering line groups are provided with a plurality of second feedthrough capacitors.

According to the scheme, eight groups of transmission lines are used for communication, the shielding performance of the second feedthrough capacitors on six groups of power supply filter lines is greater than or equal to 80dB in the frequency range from 700MHz to 6GHz, and the shielding performance of the second feedthrough capacitors is greater than or equal to 70dB in the frequency range from 6GHz to 44 GHz. And the maximum transmission speed of 1000MB per second is provided for the devices in the shielding box at the working frequency of 700MHz-44 GHz.

In a preferred embodiment, the interface is a USB interface, the filtering module includes a P signal line group, an N signal line group, a voltage supply line group, and a ground line group, two groups of the interfaces transmit data through the P signal line group and the N signal line group, two groups of the interfaces transmit current through the voltage supply line group and the ground line group, the voltage supply line group and the ground line group are both provided with a plurality of groups of LC filters, and each LC filter includes an inductance coil and a filter capacitor.

According to the scheme, data transmission is carried out through the P signal line group and the N signal line group, and the shielding performance of 700MHz to 44GHz frequency bands is larger than 70dB through the plurality of groups of LC filters on the voltage supply line group and the grounding line group. Thereby realizing that the maximum current of 1A is provided for the devices in the shielding box at the working frequency of 700MHz-44GHz, and the transmission rate is more than 30MB per second.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention;

fig. 2 is a schematic circuit diagram of the filtering module according to the first embodiment of the present invention;

fig. 3 is a schematic perspective view of a second embodiment of the present invention;

fig. 4 is a schematic circuit diagram of the filtering module according to the second embodiment of the present invention;

fig. 5 is a schematic perspective view of a third embodiment of the present invention;

fig. 6 is a schematic circuit diagram of the filtering module according to the third embodiment of the present invention.

Detailed Description

The first embodiment is as follows:

as shown in fig. 1 and 2, in this embodiment, the utility model discloses an upper cover 1, filtering interface module, the shielding that connect gradually shake and fill up 2 and lower cover 3, filtering interface module includes filtering module 4 and two sets of interfaces 5, filtering module 4's earthing terminal with upper cover 1 is connected, and is two sets of interface 5 passes through filtering module 4 electricity is connected, upper cover 1 with lower cover 3 at least one be provided with the mounting groove of 5 looks adaptations of interface, upper cover 1 with the surface of lower cover 3 all is provided with conductive coating, the shielding shake be equipped with on the cloth with the incision of filtering interface module looks adaptation, the shielding shakes and fills up 2 including connecting the electrically conductive cloth of first electrically conductive cloth, electrically conductive sponge and second as an organic whole. And the upper cover 1 or the lower cover 3 is provided with a buffer cushion block matched with the filtering interface module.

In this embodiment, the interface 5 is a dc power interface, the interface 5 includes a conductive core and conductive sheets, the filtering module 4 includes a first wire set and a second wire set, the conductive cores of the two interfaces 5 are conducted through the first wire set, the conductive sheets of the two interfaces 5 are conducted through the second wire set, and the first wire set and the second wire set are both provided with a plurality of first feedthrough capacitors.

The second embodiment:

as shown in fig. 3 and 4, the present embodiment is different from the first embodiment in that: the interface 5 is an RJ45 network port, the filtering module 4 comprises eight groups of transmission line groups and six groups of power supply filtering line groups, the interfaces 5 are connected in a communication mode through the transmission line groups, the interfaces 5 are connected in a communication mode through the six groups of power supply filtering line groups, and the power supply filtering line groups are provided with a plurality of second feedthrough capacitors.

Example three:

as shown in fig. 5 and 6, the present embodiment is different from the first embodiment in that: the interface 5 is a USB interface, the filtering module 4 includes a P signal line group, an N signal line group, a voltage supply line group and a ground line group, two groups of the interfaces 5 transmit data through the P signal line group and the N signal line group, two groups of the interfaces 5 transmit current through the voltage supply line group and the ground line group, the voltage supply line group and the ground line group are both provided with a plurality of groups of LC filters, and each LC filter includes an inductance coil and a filter capacitor.

Claims

1. A filter, characterized by: it shakes pad (2) and lower cover (3) including upper cover (1), filtering interface module, the shielding that connects gradually, filtering interface module includes filtering module (4) and two sets of interface (5), the earthing terminal of filtering module (4) with upper cover (1) is connected, and is two sets of interface (5) are passed through filtering module (4) electricity is connected, upper cover (1) with lower cover (3) at least one be provided with the mounting groove of interface (5) looks adaptation, upper cover (1) with the surface of lower cover (3) all is provided with conductive coating, the shielding shake be equipped with on the cloth with the incision of filtering interface module looks adaptation, the shielding shakes pad (2) including connecting the electrically conductive cloth of the first electrically conductive cloth, electrically conductive sponge and second as an organic whole.

2. A filter according to claim 1, wherein: and the upper cover (1) or the lower cover (3) is provided with a buffer cushion block matched with the filtering interface module.

3. A filter according to claim 1, characterized in that: the interface (5) is a direct-current power supply interface, the interface (5) comprises conductive cores and conductive sheets, the filtering module (4) comprises a first wire group and a second wire group, the conductive cores of the two interfaces (5) are conducted through the first wire group, the conductive sheets of the two interfaces (5) are conducted through the second wire group, and the first wire group and the second wire group are both provided with a plurality of first through capacitors.

4. A filter according to claim 1, characterized in that: the interface (5) is an RJ45 network port, the filtering module (4) comprises eight groups of transmission line groups and six groups of power supply filtering line groups, the interfaces (5) are connected in a communication mode through the transmission line groups, the interfaces (5) are two groups of power supply filtering line groups, the power supply filtering line groups are provided with a plurality of second feedthrough capacitors, and the power supply filtering line groups are connected in a communication mode through the transmission line groups.

5. A filter according to claim 1, characterized in that: the interface (5) is a USB interface, the filtering module (4) comprises a P signal line group, an N signal line group, a voltage supply line group and a grounding line group, the two groups of interfaces (5) transmit data through the P signal line group and the N signal line group, the two groups of interfaces (5) transmit current through the voltage supply line group and the grounding line group, the voltage supply line group and the grounding line group are both provided with a plurality of groups of LC filters, and each LC filter comprises an inductance coil and a filter capacitor.