CN114039568A

CN114039568A - Filtering device and method for 5G stray test frequency band

Info

Publication number: CN114039568A
Application number: CN202111339479.8A
Authority: CN
Inventors: 廖建明; 夏龙; 邓建坤; 林幸笋; 涂浪; 吴惠惠; 宗荔瑶; 曹少东
Original assignee: Shenzhen Ti & Balun Technology Co ltd
Current assignee: Shenzhen Ti & Balun Technology Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-02-11
Anticipated expiration: 2041-11-12
Also published as: CN114039568B

Abstract

The invention discloses a filtering device and a filtering method for a 5G stray test frequency band, which belong to the technical field of frequency band testing devices. The signal that this application set up and make different frequency ranges is difficult for appearing the condition of signal attenuation when filtering, also is difficult for appearing the phenomenon of signal shielding simultaneously to be favorable to guaranteeing final test effect.

Description

Filtering device and method for 5G stray test frequency band

Technical Field

The invention relates to the field of frequency band testing devices, in particular to a filtering device and method for a 5G stray testing frequency band.

Background

The spurious radiation test is a very important test item of 5G communication terminal equipment, and a filtering device is generally required to be used for effectively filtering frequency points with specific frequencies in the spurious radiation test so as to ensure the final test effect.

A conventional filtering apparatus for a spurious radiation test in the related art is generally implemented by using a switch having two lines, wherein one line is provided with a filtering chip, and the filtering chip is used for filtering a signal in a certain frequency range. When signal filtering for different frequency ranges is required, multiple switches are typically wired directly.

In view of the above-mentioned related technologies, the inventor believes that when a plurality of switches are directly connected by a line, the problem of signal attenuation is likely to occur, which is not favorable for ensuring the test effect.

Disclosure of Invention

In order to solve the problem that signals are not easy to attenuate when the signals in different frequency ranges are filtered and further ensure the test effect, the application provides a filtering device and a filtering method for a 5G stray test frequency band.

In a first aspect, the filtering apparatus for a 5G spurious test frequency band provided by the present application adopts the following technical scheme:

the utility model provides a filter equipment of stray test frequency channel of 5G, includes the PCB board and sets up in the multiunit filter circuit of PCB board, each filter circuit all includes filter sub-circuit and switch selection sub-circuit, when switch selection sub-circuit switched on with filter sub-circuit, filter sub-circuit realizes the frequency point filtering to specific frequency.

Through adopting above-mentioned technical scheme, the filtering subcircuit can realize filtering the frequency point of characteristics frequency, when needing to carry out the signal filtration of different frequency ranges, make each filter subcircuit that need filter circuit and switch select the subcircuit to switch on respectively can, the setting that is located the multiunit filtering circuit of same PCB board makes the difficult condition that appears signal attenuation of the signal of different frequency ranges when filtering, also be difficult for appearing signal shielding's phenomenon simultaneously, thereby be favorable to guaranteeing final test effect, and compare in tunable filter mutually, the filtering stability who uses this structure is strong, easy to control.

Optionally, the switch selection sub-circuit includes four pins, where when two of the pins are electrically connected to two ends of the filter chip, the filter chip filters a frequency point of a specific frequency, and when another two of the pins are electrically connected, the filter chip stops working.

Through adopting above-mentioned technical scheme, two pins realize switching on or not switching on to filter chip can make the corresponding realization of filter chip to the frequency point filtering or the filtering of characteristic frequency to convenient operation when making filter circuit filter, simultaneously, through switching on or not switching on to different filter circuit's filter chip, thereby be convenient for realize the signal filtration to different frequency ranges.

Optionally, at least five groups of filter circuits are uniformly distributed.

By adopting the technical scheme, at least five groups of uniformly distributed filter circuits are combined with each other, so that frequency points with different characteristic frequencies can be filtered or not filtered, and the adaptability is high.

Optionally, the PCB further comprises a packaging shell, the PCB is arranged in the packaging shell, and one packaging shell is connected with the other packaging shell through a connecting assembly.

Through adopting above-mentioned technical scheme, the encapsulation casing plays the guard action to the PCB board, is convenient for guarantee the life of PCB board, and when two PCB boards were connected, be convenient for filter more signals of different frequency ranges, and the suitability is strong, and simultaneously, the mode that two adjacent encapsulation casings are connected is convenient for guarantee the stability when two PCB boards are connected.

Optionally, coupling assembling includes fixed block and reset spring, the fixed block includes pressing splenium, grafting portion and fixed part, the fixed slot has been seted up to one side that encapsulation casing is connected with another encapsulation casing, grafting portion is located the fixed slot and slides the cooperation with the fixed slot, press splenium fixed connection in grafting portion, reset spring sets up between grafting portion and fixed slot, the one end of pressing the splenium is worn outside the encapsulation casing and with the encapsulation casing cooperation of sliding under reset spring's elastic force effect, fixed part fixed connection is kept away from the free end of pressing the splenium in grafting portion, the clamping groove has been seted up to one side that the fixed slot was kept away from to the encapsulation casing, the fixed part cooperates with the clamping groove joint.

Through adopting above-mentioned technical scheme, press the splenium to pressing, make the fixed part slide in the fixed slot, insert the grafting portion of one of them encapsulation casing to the screens inslot of another encapsulation casing afterwards, and loosen and press the splenium, the fixed part is in the screens inslot at reset spring's the firm joint of spring action, thereby realize fixing between two adjacent encapsulation casings, when removing the fixed between two encapsulation casings, press the splenium, and make the fixed part break away from the screens groove can, the setting up of fixed block makes the staff carry out the easy and simple operation of dismouting to two encapsulation casings.

Optionally, one end of the fixing part inserted into the clamping groove is wedge-shaped.

Through adopting above-mentioned technical scheme, the fixed part inserts to the screens inslot, and when the wedge face of fixed part was contradicted in the cell wall of screens groove, the fixed part received the component effect of wedge face and automatic in the fixed slot internal slipping, and the setting of fixed part wedge face is further convenient for the staff to fix two encapsulation casings.

Optionally, the screens groove includes screens horizontal segment and the vertical section of screens that is linked together with the screens horizontal segment, screens horizontal segment and the vertical section of screens extend to the both sides of encapsulation casing respectively, two when the encapsulation casing is connected, the fixed part is located the vertical section of screens.

Through adopting above-mentioned technical scheme, the screens horizontal segment and the vertical section of screens that extend to the encapsulation casing both sides are convenient for realize the processing to the screens groove, and simultaneously, the fixed part is located being provided with of the vertical section of screens and does benefit to the stability when guaranteeing that adjacent two encapsulation casings connect.

Optionally, the encapsulation casing is articulated to be installed the dustproof piece, the dustproof piece is used for sealing the notch in screens groove, dustproof piece fixed mounting has the elasticity fixture block, when the notch in dustproof piece counterpoint groove is sealed, elasticity fixture block card goes into the screens inslot.

Through adopting above-mentioned technical scheme, the setting up of dustproof makes impurity such as external dust be difficult for entering into to the screens inslot through the notch in screens groove, and the joint cooperation between elasticity fixture block and the screens groove is favorable to further guaranteeing the stability when two adjacent encapsulation casings are connected.

Optionally, the dustproof piece is embedded with a first magnetic piece, and the packaging shell is embedded with a second magnetic piece attracted by the first magnetic piece.

Through adopting above-mentioned technical scheme, first magnetism is inhaled being provided with of piece and second magnetism and is favorable to guaranteeing that the dustproof piece removes the stability to the position when the screens groove is sealed.

In a second aspect, the present application provides a filtering method for a 5G spurious test frequency band, which adopts the following technical scheme:

a filtering method for a 5G stray test frequency band comprises the following specific steps: s1, conducting or not conducting the filter chips of the plurality of filter circuits, so that the filter sub-circuits of the plurality of filter circuits realize the filtering of the frequency points of the characteristic frequency;

s2, connecting or disconnecting the filter chips of different filter circuits through connecting different pins, thereby realizing the signal filtering in different frequency ranges;

and S3, connecting one of the packaging shells with the other packaging shell, and communicating the filter circuits of the two PCBs, thereby increasing the frequency range adjusted when filtering the signals.

By adopting the technical scheme, when signals in different frequency ranges are filtered, the filtering sub-circuits of all the required filtering circuits and the switch selection sub-circuits are respectively conducted, the arrangement of the multiple groups of filtering circuits on the same PCB board enables the signals in different frequency ranges to be difficult to generate signal attenuation when being filtered, and meanwhile, the phenomenon of signal shielding is difficult to generate, so that the final test effect is favorably ensured.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the arrangement of the multiple groups of filter circuits on the same PCB enables signals in different frequency ranges to be difficult to attenuate during filtering, and meanwhile, the phenomenon of signal shielding is difficult to occur, so that the final test effect is guaranteed.

2. The selection ends of the two selection switches are conducted or not conducted on the filter chip, so that the filter chip can correspondingly filter or not filter the frequency points of the characteristic frequency, and the filter circuit is convenient to operate when filtering.

3. When two PCBs are connected, be convenient for filter more signals of different frequency ranges, the suitability is strong.

Drawings

Fig. 1 is a schematic structural diagram of a filter circuit in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a package housing in an embodiment of the present application.

Fig. 3 is a partial cross-sectional schematic view of a package housing in an embodiment of the present application.

Fig. 4 is a partially enlarged schematic view of a portion a in fig. 3.

Description of reference numerals:

1. a PCB board; 2. a filter chip; 3. a first pin; 4. a second pin; 5. a third pin; 6. a fourth pin; 7. a first contact; 8. a second contact; 9. a third contact; 10. a fourth contact; 11. a package housing; 12. a fixed block; 121. a pressing part; 122. a plug-in part; 123. a fixed part; 13. a return spring; 14. fixing grooves; 141. fixing the horizontal section; 142. fixing the vertical section; 15. a clamping groove; 151. a clamping horizontal section; 152. a clamping vertical section; 16. a dust-proof member; 161. a dustproof horizontal part; 162. a dust-proof vertical portion; 17. an elastic clamping block; 18. a first magnetic attraction member; 19. a second magnetic attachment.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a filtering device for a 5G stray test frequency band. Referring to fig. 1, the filtering device for the 5G stray test at any frequency band comprises a PCB 1 and a plurality of sets of filtering circuits arranged on the PCB 1, the filtering circuits are set to five sets in the embodiment of the present application, each filtering circuit comprises a filtering sub-circuit and a switch selection circuit, each filtering sub-circuit comprises a filtering chip 2, each switch selection sub-circuit comprises four pins, and the four pins are respectively set to be a first pin 3, a second pin 4, a third pin 5 and a fourth pin 6.

With reference to fig. 1, the PCB 1 is provided with four contacts, the four contacts are respectively set as a first contact 7, a second contact 8, a third contact 9 and a fourth contact 10, the first contact 7, the second contact 8, the third contact 9 and the fourth contact 10 are respectively electrically connected to the first pin 3, the second pin 4, the third pin 5 and the fourth pin 6, and two ends of the filter chip 2 are respectively electrically connected to the first contact 7 and the third contact 9, so that when the first pin 3 is electrically connected to the third pin 5, the filter chip 2 filters a frequency point of a specific frequency, and when the second pin 4 is electrically connected to the fourth pin 6, the filter chip 2 of the filter circuit is disconnected to stop working. When the filter circuits of the filter device are conducted, one filter circuit is electrically connected to the signal generator, and the other filter circuit is electrically connected to the load, each filter chip 2 realizes the signal filtering in a certain frequency range.

Referring to fig. 1 and 2, the PCB board 1 is externally provided with package housings 11, each package housing 11 is substantially rectangular, and one package housing 11 is connected to another package housing 11 through a connecting assembly, so as to further facilitate screening of signals of different frequency bands and enhance applicability.

Referring to fig. 3 and 4, the connecting assembly is provided in two sets, the connecting assembly includes a fixing block 12 and a return spring 13, and the fixing block 12 includes a pressing portion 121, an insertion portion 122, and a fixing portion 123. Two fixing grooves 14 are formed in one side of the length direction of the package housing 11, each fixing groove 14 includes a fixing horizontal section 141 and a fixing vertical section 142 communicated with the fixing horizontal section 141, and the fixing vertical sections 142 of the two fixing grooves 14 extend to two sides of the width direction of the package housing 11 respectively.

Referring to fig. 2 and 4, the inserting portion 122 is located in the fixed horizontal section 141 and is in sliding fit with the fixed horizontal section 141, one end of the inserting portion 122 is located outside the fixed horizontal section 141, the pressing portion 121 is fixedly connected to one end of the inserting portion 122 in the length direction, the pressing portion 121 is located in the fixed vertical section 142 and is in sliding fit with the fixed vertical section 142, and one end of the pressing portion 121 is located outside the fixed vertical section 142. One end of the return spring 13 is connected to a groove wall of the fixed horizontal section 141, and the other end of the return spring is connected to one side of the inserting portion 122 away from the pressing portion 121, so that when the pressing portion 121 is forced to move, the inserting portion 122 slides in the fixed horizontal section 141, and when the pressing portion 121 is released, the inserting portion 122 and the pressing portion 121 are reset under the elastic force of the return spring 13.

Referring to fig. 3 and 4, the fixing portion 123 is fixedly connected to one end of the inserting portion 122 away from the pressing portion 121, one side of the package housing 11 in the length direction away from the fixing groove 14 is provided with a clamping groove 15 corresponding to the position of the fixing portion 123 of the two fixing blocks 12, the clamping groove 15 includes a clamping horizontal section 151 and a clamping vertical section 152 communicated with the clamping horizontal section 151, and the clamping vertical sections 152 of the two clamping grooves 15 extend to two sides of the package housing 11 in the width direction respectively. Fixed part 123 and screens horizontal segment 151 grafting cooperation, when two adjacent encapsulation casings 11 are connected, grafting portion 122 is located screens horizontal segment 151, fixed part 123 is located the vertical section 152 of screens, thereby play the limiting displacement to two adjacent encapsulation casings 11 position, guarantee the stability of two adjacent encapsulation casings 11 relative position, in order to insert fixed part 123 to screens horizontal segment 151, the one end that grafting portion 122 was kept away from to fixed part 123 is the wedge setting, when the wedge surface atress of fixed part 123, fixed part 123 drives grafting portion 122 automatic sliding in fixed horizontal segment 141 under the component force effect of wedge surface.

Referring to fig. 2 and 4, two dust-proof parts 16 are hinged to the package housing 11, each dust-proof part 16 includes a dust-proof horizontal part 161 and a dust-proof vertical part 162, one ends of the two dust-proof vertical parts 162 are respectively hinged to two sides of the width direction of the package housing 11, the dust-proof horizontal parts 161 are integrally connected to one end of the dust-proof vertical part 162 away from the package housing 11 and are perpendicular to the dust-proof vertical part 162, when the dust-proof parts 16 rotate to a state that the dust-proof horizontal parts 161 and the dust-proof vertical parts 162 are both attached to the package housing 11, the dust-proof horizontal parts 161 and the dust-proof vertical parts 162 respectively seal two notches of the clamping groove 15, so that impurities such as dust are not easy to enter the clamping groove 15, and the dust-proof horizontal parts 161 have elasticity, so that a worker can apply force to move the dust-proof horizontal parts 161.

With continued reference to fig. 2 and 3, in order to ensure the stability of the position of the dust-proof member 16 when closing the notch of the retaining groove 15, an elastic retaining block 17 is fixedly installed on the dust-proof horizontal portion 161, and the elastic retaining block 17 is in snap fit with the notch of the retaining vertical section 152 of the retaining groove 15. One side of dustproof vertical portion 162 is inlayed and is established and install first magnetism and inhale piece 18, encapsulation casing 11 is inlayed and is installed and inhale the second magnetism that piece 18 attracted mutually and inhale piece 19 with first magnetism, first magnetism is inhaled piece 18 and second magnetism and is inhaled a magnet that piece 19 selected for inter attraction in this application embodiment, rotate to dustproof horizontal part 161 when keeping away from one side of dustproof vertical portion 162 and encapsulation casing 11 inconsistent, piece 18 is inhaled mutually with second magnetism to first magnetism to inhale the piece 19 laminating to guarantee the stability of dustproof 16 position.

The implementation principle of the filtering device for the 5G stray test frequency band in the embodiment of the application is as follows: when carrying out the spurious test of radiation, the filtering sub-circuit can realize carrying out the filtering to the frequency point of characteristics frequency, when needing to carry out the signal filtration of different frequency ranges, make respectively each need filtering circuit's filter chip 2 switch on can, the setting that is located the multiunit filter circuit of same PCB board 1 makes the difficult condition that appears signal attenuation of the signal of different frequency ranges when filtering, also be difficult for appearing signal shielding's phenomenon simultaneously, thereby be favorable to guaranteeing final test effect, and compare in tunable filter mutually, the filtering stability who uses this structure is strong, and is easy to control.

The embodiment of the application also discloses a filtering method of the 5G stray test frequency band. The filtering method for the 5G spurious test in any frequency band comprises the following specific steps.

S1, conducting or not conducting the filter chips 2 of the plurality of filter circuits, so that the filter sub-circuits of the plurality of filter circuits realize the filtering of the frequency points of the characteristic frequencies;

s2, the filter chips 2 of different filter circuits are conducted or not conducted by connecting different pins, so that the signals in different frequency ranges are filtered;

s3, the fixing portion 123 of the fixing block 12 of one of the package housings 11 is inserted into the vertical positioning groove 152 of the positioning groove 15 of the other package housing 11, so as to connect the two package housings 11 and connect the filter circuits of the two PCB boards 1, thereby increasing the frequency range adjusted during signal filtering.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a filter equipment of 5G spurious test frequency channel which characterized in that: the filter comprises a PCB (1) and a plurality of groups of filter circuits arranged on the PCB (1), wherein each filter circuit comprises a filter sub-circuit and a switch selection sub-circuit, and when the switch selection sub-circuit is conducted with the filter sub-circuits, the filter sub-circuits realize frequency point filtering of specific frequencies.

2. The filtering apparatus according to claim 1, wherein: the switch selection sub-circuit comprises four pins, wherein when two pins are respectively electrically connected with two ends of the filter chip (2), the filter chip (2) filters frequency points with specific frequencies, and when the other two pins are electrically connected, the filter chip (2) stops working.

3. The filtering apparatus according to claim 1, wherein: at least five groups of filter circuits are uniformly distributed.

4. The filtering apparatus according to claim 1, wherein: still include encapsulation casing (11), PCB board (1) is arranged in encapsulation casing (11) outward, and one of them encapsulation casing (11) are connected with another encapsulation casing (11) through coupling assembling.

5. The filtering apparatus according to claim 4, wherein: the connecting assembly comprises a fixing block (12) and a return spring (13), the fixing block (12) comprises a pressing part (121), an inserting part (122) and a fixing part (123), one side of the packaging shell (11) connected with another packaging shell (11) is provided with a fixing groove (14), the inserting part (122) is positioned in the fixing groove (14) and is in sliding fit with the fixing groove (14), the pressing part (121) is fixedly connected with the inserting part (122), the return spring (13) is arranged between the inserting part (122) and the fixing groove (14), one end of the pressing part (121) penetrates out of the packaging shell (11) under the elastic force action of the return spring (13) and is in sliding fit with the packaging shell (11), the fixing part (123) is fixedly connected with the free end of the inserting part (122) far away from the pressing part (121), one side of the packaging shell (11) far away from the fixing groove (14) is provided with a clamping groove (15), the fixing part (123) is matched with the clamping groove (15) in a clamping manner.

6. The filtering apparatus according to claim 5, wherein: one end of the fixing part (123) inserted into the clamping groove (15) is arranged in a wedge shape.

7. The filtering apparatus according to claim 5, wherein: screens groove (15) include screens horizontal segment (151) and the vertical section of screens (152) that is linked together with screens horizontal segment (151), screens horizontal segment (151) and the vertical section of screens (152) extend to the both sides of encapsulation casing (11) respectively, two when encapsulation casing (11) are connected, fixed part (123) are located the vertical section of screens (152).

8. The filtering apparatus according to claim 5, wherein: encapsulation casing (11) are articulated to be installed dust keeper (16), dust keeper (16) are used for sealing to the notch in screens groove (15), dust keeper (16) fixed mounting has elasticity fixture block (17), when dust keeper (16) are sealed to the notch in screens groove (15), elasticity fixture block (17) card is gone into in screens groove (15).

9. The filtering apparatus according to claim 8, wherein: the dustproof piece (16) is embedded with a first magnetic piece (18), and the packaging shell (11) is embedded with a second magnetic piece (19) attracted by the first magnetic piece (18).

10. A filtering method for a 5G spurious test frequency band is characterized by comprising the following steps: the method comprises the following steps: s1, conducting or not conducting the filter chips (2) of the plurality of filter circuits, so that the filter sub-circuits of the plurality of filter circuits realize the frequency point filtering of the characteristic frequency;

s2, the filter chips (2) of different filter circuits are conducted or not conducted by connecting different pins, so that the signals in different frequency ranges are filtered;

and S3, connecting one of the packaging shells (11) with the other packaging shell (11), and communicating the filter circuits of the two PCB boards (1), thereby increasing the frequency range adjusted when filtering signals.