WO2021098726A1 - 滤波组件、天线装置和基站系统 - Google Patents

滤波组件、天线装置和基站系统 Download PDF

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Publication number
WO2021098726A1
WO2021098726A1 PCT/CN2020/129795 CN2020129795W WO2021098726A1 WO 2021098726 A1 WO2021098726 A1 WO 2021098726A1 CN 2020129795 W CN2020129795 W CN 2020129795W WO 2021098726 A1 WO2021098726 A1 WO 2021098726A1
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WO
WIPO (PCT)
Prior art keywords
filter
connector
shielding
signal line
dielectric plate
Prior art date
Application number
PCT/CN2020/129795
Other languages
English (en)
French (fr)
Inventor
武增强
康玉龙
卜伟
杨锋
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP20890440.9A priority Critical patent/EP3979403A4/en
Publication of WO2021098726A1 publication Critical patent/WO2021098726A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
    • H05K1/0219—Printed shielding conductors for shielding around or between signal conductors, e.g. coplanar or coaxial printed shielding conductors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0237—High frequency adaptations
    • H05K1/0243—Printed circuits associated with mounted high frequency components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/1006—Non-printed filter
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10189—Non-printed connector

Definitions

  • This application relates to the field of communications, in particular to a filtering component, an antenna device and a base station system.
  • embodiments of the present application provide a filter component, an antenna device, and a base station system.
  • a filter assembly of the present application includes a dielectric plate on which a filter, a first connector, and a second connector are provided, and an input signal line is provided inside the dielectric plate, and the input signal One end of the line is connected to the input end of the filter, the other end of the input signal line is connected to the first connector, and the output end of the filter is connected to the second connector through an output signal line,
  • the filter assembly further includes a signal shielding structure having a shielding cavity, at least a part of the dielectric plate and the input signal line are located in the shielding cavity, and the output signal line is located on the input signal line Outside the shielding cavity where it is located.
  • the signal shielding structure includes: a first shielding portion and a second shielding portion, the first shielding portion is a metal film layer on the surface of the dielectric plate, and the second shielding portion passes through The dielectric board is located between the input signal line and the output signal line, and the first shielding part and the second shielding part enclose the shielding cavity.
  • the dielectric plate is provided with a via hole
  • the second shielding portion includes a metal member located in the via hole.
  • the dielectric plate is provided with a plurality of the vias, the plurality of vias are spaced apart from each other, and the second shielding portion includes a plurality of the vias respectively located in the plurality of vias. metallic parts.
  • the filter and the first connector are located on the same side of the dielectric plate, and the second connector and the filter are respectively provided on two opposite surfaces of the dielectric plate on.
  • the output signal line includes a first transmission part and a second transmission part, the first transmission part passes through the dielectric plate, and one end of the first transmission part is connected to the output of the filter.
  • the other end of the first transmission part is connected to one end of the second transmission part, the other end of the second transmission part is connected to the second connector, and the second transmission part is connected to the second connector.
  • the second connector is located on the same side of the media board.
  • the output signal line is located inside the dielectric board, the signal shielding structure has a plurality of shielding cavities, and the input signal line and the output signal line are located in different shielding cavities.
  • the media board is provided with a mounting hole
  • the second connector is located in the mounting hole
  • the output signal line includes a third transmission part, a fourth transmission part, and a Five transmission parts and a sixth transmission part
  • the third transmission part is connected to the output end of the filter
  • the sixth transmission part is connected to the second connector
  • the third transmission part and the first The five transmission parts all pass through the dielectric plate, the sixth transmission part and the filter are both arranged on the first surface of the dielectric plate
  • the fourth transmission part is arranged between the dielectric plate and the dielectric plate.
  • a plurality of the filters, a plurality of the first connectors, and a plurality of the second connectors are provided on the dielectric board, and the first connectors and the second connectors are Each of the filters has a one-to-one correspondence with the filters, the input end of each filter is connected to the corresponding first connector through the input signal line, and the output end of each filter passes through all the filters.
  • the output signal line is connected to the corresponding second connector, the signal shielding structure has multiple shielding cavities, and the input signal lines connected to different filters are located in different shielding cavities.
  • the surface of the filter is provided with a metal layer.
  • an embodiment of the present application provides an antenna device, including an antenna structure, a power amplifier structure, and the above-mentioned filter component.
  • the first connector of the filter component is connected to the power amplifier structure, and the second connector of the filter component Connected to the antenna structure.
  • an embodiment of the present application provides a base station system including the above-mentioned antenna device.
  • Figure 1 is a schematic diagram of the connection of a metalized filter with an antenna and a power amplifier module in some situations;
  • Figure 2a is a bottom view of a dielectric filter set on a phase-shifting network in some cases
  • 2b is a cross-sectional view of the connection of the dielectric filter with the antenna structure and the power amplifier structure in some cases;
  • FIG. 3a is a cross-sectional view of the first structure of the filter assembly provided by an embodiment of the application.
  • FIG. 3b is a top view of the first structure of the filter component provided by the embodiment of the application.
  • FIG. 3c is a perspective view of the first structure of the filter component provided by an embodiment of the application.
  • FIG. 4 is a cross-sectional view of the second structure of the filter assembly provided by an embodiment of the application.
  • FIG. 5a is a cross-sectional view of a third structure of a filter component provided by an embodiment of the application.
  • FIG. 5b is a top view of the third structure of the filter assembly provided by the embodiment of the application.
  • FIG. 5c is a perspective view of a third structure of the filter component provided by an embodiment of the application.
  • FIG. 6a is one of the three-dimensional diagrams of the fourth structure of the filter component provided by the embodiment of the application.
  • Fig. 6b is the second three-dimensional view of the fourth structure of the filter component provided by the embodiment of the application.
  • FIG. 7 is a schematic structural diagram of an antenna device provided by an embodiment of the application.
  • the filter is an important structure in the base station system, and the filter is connected between the antenna module and the power amplifier module.
  • the filter can be a small metalized filter or a dielectric filter.
  • FIG. 1 is a schematic diagram of the connection between the metalized filter and the antenna and the power amplifier module in some situations.
  • the metalized filter 101 is connected to the power amplifier structure 103 and the antenna structure 104 through a connector 102 provided thereon.
  • the volume and weight of the whole structure are large, and it is difficult to enhance the competitiveness of the base station system.
  • Figure 2a is a bottom view of the dielectric filter set on the phase shifting network in some cases
  • Figure 2b is a cross-sectional view of the dielectric filter connected to the antenna structure and the power amplifier structure in some cases, combined with Figure 2a and Figure 2b, the dielectric
  • the filter 201 is directly attached to the surface of the phase-shifting network 202, connected to the antenna structure 104 through the phase-shifting network 202 and the feeding layer 203, and connected to the power amplifier structure 103 through the phase-shifting network 202 and the connection structure 205, as shown in 203a in Figure 2a
  • the dashed frame in FIG. 2a is the boundary of the metal shielding cover.
  • a metal shielding cover 204 is added, and the setting of the metal shielding cover 204 increases the volume of the whole machine.
  • FIG. 3a is a cross-sectional view of the first structure of the filter assembly provided by an embodiment of the application
  • FIG. 3b is a top view of the first structure of the filter assembly provided by an embodiment of the application
  • 3c is a perspective view of the first structure of the filter assembly provided by an embodiment of the application.
  • the filter assembly includes a dielectric plate 302, and the dielectric plate 302 is provided with a filter 301 and a first connector 303 and the second connector 304, the dielectric board 302 is provided with an input signal line 305, one end of the input signal line 305 is connected to the input end 301a of the filter 301, and the other end of the input signal line 305 is connected to the first connector 303,
  • the first connector 303 is used to connect to the power amplifier structure; the output terminal 301b of the filter 301 is connected to the second connector 304 through the output signal line 306.
  • the filter assembly further includes a signal shielding structure 307 having a shielding cavity, at least a part of the dielectric plate 302 and the input signal line 305 are located in the shielding cavity, and the output signal line 306 is located outside the shielding cavity where the input signal line 305 is located.
  • the signal shielding structure 307 has multiple shielding cavities, and the output signal line 306 and the input signal line 305 are located in different shielding cavities, or the output signal line 306 is not located in any shielding cavity.
  • the filter 301 may be located outside the shielded cavity.
  • the shielding cavity of the signal shielding structure 307 is not a cavity, but can be filled by at least a part of the dielectric plate 302.
  • the material of the dielectric plate 302 is not particularly limited, as long as it is a dielectric material.
  • the dielectric board 302 may be a PCB (Printed Circuit Board, printed circuit board), or a plastic board.
  • the dielectric plate 302 is a plastic plate to reduce cost.
  • the input signal line 305 can be buried in the dielectric board 302 through an integrated injection molding process.
  • the filter 301 may be a dielectric filter 301 in particular, which is disposed on the first surface of the dielectric plate 302 through a surface mount technology (SMT), and the input end 301a and the output end 301b of the filter 301 both face the dielectric plate 302.
  • SMT surface mount technology
  • the input terminal 301a of the filter 301 receives the output signal of the power amplifier structure through the input signal line 305 and the first connector 303, and since the input signal line 305 is located in the shielding cavity of the signal shielding structure 307, the output signal The line 306 is located outside the shielded cavity where the input signal line 305 is located, so it can prevent the strong spurious signal output by the power amplifier structure from leaking directly from the space to the output of the filter 301, thereby preventing the isolation of the input and output of the filter from being reduced, thereby preventing filtering
  • the performance of the device 301 is affected.
  • the dielectric plate 302 located in the shielding cavity can separate the input signal line 305 from the signal shielding structure 307, and the signal The shielding structure 307 does not need to take up too much space outside the dielectric board 302.
  • the signal shielding structure 307 is arranged as a structure that surrounds the dielectric board 302 and is attached to the surface of the dielectric board 302, or the signal shielding structure 307 is arranged on the surface of the dielectric board 302.
  • the inside of the dielectric plate 302 can be used, thereby reducing the volume of the filter assembly, thereby reducing the volume of the whole machine structure.
  • the first structure of the filter component of the embodiment of the present application will be introduced below in conjunction with FIG. 3a to FIG. 3c.
  • the input terminal 301a of the filter 301 is connected to the first connector 303 through the input signal line 305
  • the output terminal 301b of the filter 301 is connected to the second connector 304 through the output signal line 306.
  • the first connector 303 of the filter component is used to connect to the power amplifier structure
  • the second connector 304 is used to connect to the antenna structure.
  • Both the first connector 303 and the second connector 304 adopt common radio frequency signal connectors.
  • the first connector 303 and the second connector 304 can adopt sliding-end straight ZSMP radio frequency signals. Connectors, but it should be understood that the first connector 303 and the second connector 304 may also use other connectors, which are not limited here.
  • the first connector 303 and the filter 301 are located on the same side of the dielectric plate 302, and both are located on the first surface of the dielectric plate 302; the second connector 304 is provided on the second surface of the dielectric plate 302, the first surface and the second surface The two surfaces are opposite.
  • the first connector 303, the second connector 304 and the filter 301 can all be arranged on the surface of the dielectric board 302 through a surface mount process.
  • the input terminal 301a of the filter 301 is connected to the bottom end of the first connector 303 through the input signal line 305, and the output terminal 301b of the filter 301 is connected to the bottom end of the second connector 304 through the output signal line 306.
  • the first connector Both the top end of the 303 and the top end of the second connector 304 are provided with a plug-in portion.
  • the plug-in portion of the first connector 303 is used for blind plug connection with the connector of the power amplifier structure
  • the plug-in portion of the second connector 304 is used for Plug-in connection with the connector of the antenna structure. It can be seen that the positions of the first connector 303 and the second connector 304 in the filter assembly are the same as the positions of the two connectors in the metalized filter 101 in FIG. 1, so that the filter assembly can be used for metalized filtering.
  • either a metalized filter or a dielectric filter can be used in the whole machine.
  • the output signal line 306 may specifically include a first transmission portion 306a and a second transmission portion 306b.
  • the first transmission portion 306a penetrates the dielectric plate 302, that is, the first transmission portion 306a is a metalized via, and one end of the first transmission portion 306a is connected to The filter 301 is connected, the other end of the first transmission part 306 a is connected to one end of the second transmission part 306 b, and the other end of the second transmission part 306 b is connected to the second connector 304.
  • the second transmission portion 306b and the second connector 304 are located on the same side of the dielectric plate 302, and both are located on the second surface of the dielectric plate 302.
  • the second transmission portion 306b is in the form of a microstrip line, thereby simplifying the processing technology and improving the processing accuracy.
  • the second transmission portion 306b in the form of a microstrip line can be manufactured by a laser engraving or etching process, so as to be pasted on the dielectric plate 302.
  • the signal shielding structure 307 includes a first shielding portion 307a and a second shielding portion 307b.
  • the first shielding portion 307a is a metal film layer located on the surface of the dielectric plate 302, and the metal film layer can be formed on the surface of the dielectric plate 302 through an electroplating process.
  • the second shielding portion 307b passes through the dielectric plate 302 and is located between the input signal line 305 and the output signal line 306.
  • the first shielding portion 307a and the second shielding portion 307b enclose a shielding cavity. Wherein, the second shielding portion 307b can prevent signal interference between the input signal line 305 and the output signal line 306.
  • the shielding cavity is not necessarily completely sealed, as long as it can function as signal shielding.
  • the surface of the filter 301 is provided with a metal layer.
  • the first shielding portion 307a can increase the coverage area as much as possible on the premise of being insulated from the output signal line 306, so as to prevent external signals from causing interference to the output signal to a certain extent.
  • the first surface of the dielectric plate 302 is covered by the first shielding portion 307a and the filter 301, and the metal layer on the surface of the filter 301 also functions as a signal shield. Therefore, the first shielding portion 307 and the filter 301 can also prevent stray signals from the power amplifier structure from radiating to the antenna structure.
  • the dielectric plate 302 is provided with a via hole, and the second shielding portion 307b includes a metal member located in the via hole.
  • the number of vias is multiple, and the multiple vias are spaced apart from each other, so as to prevent the dielectric plate from being broken.
  • the second shielding portion 307b may include a plurality of metal pieces respectively located in the plurality of via holes. It should be noted that a plurality of vias are arranged in a direction perpendicular to the paper in FIG. 3a, and the cross-sectional view shown in FIG. 3a is obtained by longitudinal sectioning through the position of one of the vias. Therefore, not shown in FIG. 3a Multiple vias are shown. In addition, there is an interval between adjacent via holes, but it should be understood that the interval should not be too large to ensure the signal shielding effect of the second shielding portion 307.
  • FIG. 4 is a cross-sectional view of the second structure of the filter assembly provided by the embodiment of the application.
  • the structure shown in FIG. 4 is similar to the structure shown in FIG. 3a, and only the difference between the two structures will be introduced below.
  • the output signal line 306 is located inside the dielectric board 302.
  • both the input signal line 305 and the output signal line 306 can be pre-embedded in the dielectric plate 302 by an injection molding process.
  • the signal shielding structure 307 may have multiple shielding cavities, and the input signal line 305 and the output signal line 306 are located in different shielding cavities.
  • the signal shielding structure also includes a first shielding portion 307a and a second shielding portion 307b.
  • the difference from FIG. 3a is that the first shielding portion 307a in FIG. 4 covers a larger area on the dielectric plate 302.
  • the dielectric plate The parts of the surface of 302 except the area where the filter 301, the first connector 303, and the second connector 304 are located are covered by the first shielding portion 307a, and the first shielding portion 307a and the second shielding portion 307b define a signal corresponding to the input signal.
  • FIG. 5a is a cross-sectional view of a third structure of a filter assembly provided by an embodiment of the application
  • FIG. 5b is a top view of a third structure of a filter assembly provided by an embodiment of the application
  • FIG. 5c is a view of the filter assembly provided by an embodiment of the application A three-dimensional view of the third structure.
  • the third structure of the filter assembly is similar to the above-mentioned first structure. Only the difference between the two structures will be introduced below.
  • a mounting hole is provided on the dielectric plate 302, and the second connector 304 is located in the mounting hole.
  • the second connector 304 may be embedded in the dielectric board 302 through an injection molding process.
  • the output signal line 306 includes a third transmission part 306c, a fourth transmission part 306d, a fifth transmission part 306e, and a sixth transmission part 306f.
  • the third transmission part 306c is connected to the output terminal 301b of the filter 301
  • the sixth transmission part 306c is connected to the output terminal 301b of the filter 301.
  • the transmission part 306f is connected to the second connector 304.
  • the sixth transmission part 306f and the filter 301 are both disposed on the first surface of the dielectric plate 302, and the fourth transmission part 306d is disposed on the second surface of the dielectric plate 302 opposite to the first surface.
  • Both the sixth transmission part 306f and the fourth transmission part 306d may adopt the form of a microstrip line.
  • the second connector 304 can be realized by an integrated process of injection molding and electroplating, and the second connector 304 is directly wrapped in the molding with the injection material, so that the second connector 304 is in the medium
  • the fixing in the board 302 can reduce the surface mounting process and reduce the cost at the same time.
  • FIG. 6a is one of the three-dimensional views of the fourth structure of the filter assembly provided by the embodiment of this application
  • FIG. 6b is the second three-dimensional view of the fourth structure of the filter assembly provided by the embodiment of this application.
  • the fourth structure is similar to the above-mentioned first
  • the structures are similar, and only the differences between the two structures are introduced below.
  • a plurality of filters 301, a plurality of first connectors 303, and a plurality of second connectors 304 are provided on the dielectric plate 302.
  • the first connector 303, the second connector 304 corresponds to the filter 301 one-to-one.
  • each filter 301 is connected to the corresponding first connector 303 through the input signal line, and the output end of each filter 301 is connected to the corresponding first connector 303 through the output signal line 306.
  • the second connector 304 is connected. It should be understood that the input signal lines 305 connected to different filters 301 are different, and the output signal lines 306 connected to different filters 301 are also different.
  • the input signal line and the output signal line can be set according to any one of the methods shown in FIG. 3a, FIG. 4, and FIG. 5a, and will not be repeated here.
  • the signal shielding structure has multiple shielding cavities, and the input signal lines connected to different filters 301 are located in different shielding cavities to prevent interference of signals received by different filters 301.
  • the shielding cavity can correspond to the filter one-to-one, so that the input signal line connected to each filter is located in the corresponding shielding cavity, and the output signal line is located outside the shielding cavity; of course, the number of shielding cavities can also be changed. Set to twice the number of filters, and the input signal lines and output signal lines connected to each filter correspond to different shielded cavities.
  • the above-mentioned second shielding part may be provided between the input signal lines connected to different filters 301.
  • the filters 301 may be arranged according to actual needs, for example, arranged in a row, or arranged in multiple rows and multiple columns. Multiple filters 301 are arranged on the same dielectric plate 302, and the entire dielectric plate 302 is integrally injection molded, which can reduce the cost of the mold, reduce the assembly time of the whole machine in the later stage, and improve the production efficiency.
  • FIG. 7 is a schematic structural diagram of the antenna device provided by an embodiment of the application.
  • the antenna device includes an antenna structure 400, a power amplifier structure 401, and the above embodiments. Filter components.
  • the first connector 303 of the filter component is connected to the power amplifier structure 401, and the antenna structure 400 is used to receive the signal output by the output terminal 301b of the filter 301.
  • the second connector 304 of the filter component is connected to the antenna structure 400.
  • the power amplifier structure 401 may include an active power amplifier board 401a and a third connector 401b provided on the active power amplifier board 401a, and the antenna structure 400 includes a plurality of antenna units and a fourth connector 400b electrically connected to the antenna unit 400a.
  • the first connector 303 of the filter component is connected to the third connector 401b, and the second connector 304 of the filter component is connected to the fourth connector 400b.
  • the antenna structure 400 and the power amplifier structure 401 are respectively located on opposite sides of the dielectric plate 302.
  • the antenna device may also include a phase shift network (not shown in the figure), which may be provided on the same signal board as the antenna unit.
  • the volume of the filter component is small, so that the volume of the antenna device can be reduced, and the filter is arranged on the dielectric plate, which will not affect the layout of the phase shifting network and simplify the design.
  • a base station system including the above-mentioned antenna device.
  • the volume of the filter component is small, so that the volume of the antenna device can be reduced, thereby reducing the volume of the entire base station system.
  • the input signal line connected to the input end of the filter is located in the shielding cavity of the signal shielding structure, and the output signal line connected to the output end of the filter is located in the input
  • the signal line is located outside the shielded cavity, so it can prevent the strong spurious signal output by the power amplifier structure from leaking directly from the space to the output of the filter, thereby preventing the isolation of the input and output of the filter from being reduced, and preventing the performance of the filter from being affected.
  • the dielectric board located in the shielding cavity can separate the input signal line and the signal shielding structure, and the signal shielding structure does not need to be outside the dielectric board It takes up too much extra space, thereby reducing the volume of the filter component, thereby reducing the volume of the whole machine structure.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

一种滤波组件、天线装置和基站系统，滤波组件包括介质板(302)，所述介质板(302)上设置有滤波器(301)、第一连接器(303)和第二连接器(304)，所述介质板(302)内设置有输入信号线(305)，所述输入信号线(305)的一端与所述滤波器(301)的输入端(301a)相连，所述输入信号线(305)的另一端与所述第一连接器(303)相连，所述滤波器(301)的输出端(301b)通过输出信号线(306)与所述第二连接器(304)相连，所述滤波组件还包括信号屏蔽结构(307)，所述信号屏蔽结构(307)具有屏蔽腔，所述介质板(302)的至少一部分和所述输入信号线(305)位于所述屏蔽腔内，所述输出信号线(306)位于所述输入信号线(305)所在的所述屏蔽腔外。

Description

滤波组件、天线装置和基站系统
相关申请的交叉引用
本申请基于申请号为201922024850.6、申请日为2019年11月21日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及通信领域，具体涉及一种滤波组件、天线装置和基站系统。
背景技术
通信技术的快速发展推动着通信基站设备向小型化，集成化，轻量化的局势演进。介质滤波器由于其良好的性能、小体积和轻重量而被广泛的应用于基站设备中。
在一些情形下，基站系统中通常有小型金属化滤波器和介质滤波器两种方案。但无论采用金属化滤波器还是介质滤波器，均会造成整机体积较大的问题。
发明内容
有鉴于此，旨在至少在一定程度上解决上述技术问题，本申请实施例提供了一种滤波组件、天线装置和基站系统。
第一方面，本申请一种滤波组件，包括介质板，所述介质板上设置有滤波器、第一连接器和第二连接器，所述介质板内部设置有输入信号线，所述输入信号线的一端与所述滤波器的输入端相连，所述输入信号线的另一端与所述第一连接器相连，所述滤波器的输出端通过输出信号线与所述第二连接器相连，所述滤波组件还包括信号屏蔽结构，所述信号屏蔽结构具有屏蔽腔，所述介质板的至少一部分和所述输入信号线位于所述屏蔽腔内，所述输出信号线位于所述输入信号线所在的所述屏蔽腔外。
在一些实施例中，所述信号屏蔽结构包括：第一屏蔽部和第二屏蔽部，所述第一屏蔽部为位于所述介质板的表面的金属膜层，所述第二屏蔽部穿过所述介质板，且位于所述输入信号线与所述输出信号线之间，所述第一屏蔽部和所述第二屏蔽部围成所述屏蔽腔。
在一些实施例中，所述介质板上设置有过孔，所述第二屏蔽部包括位于所述过孔内的金属件。
在一些实施例中，所述介质板上设置有多个所述过孔，多个所述过孔彼此间隔，所述第二屏蔽部包括分别位于多个所述过孔内的多个所述金属件。
在一些实施例中，所述滤波器与所述第一连接器位于所述介质板的同侧，所述第二连接器与所述滤波器分别设置在所述介质板的两个相对的表面上。
在一些实施例中，所述输出信号线包括第一传输部和第二传输部，所述第一传输部穿过所述介质板，所述第一传输部的一端与所述滤波器的输出端相连，所述第一传输部的另 一端与所述第二传输部的一端相连，所述第二传输部的另一端与所述第二连接器相连，所述第二传输部与所述第二连接器位于所述介质板的同侧。
在一些实施例中，所述输出信号线位于所述介质板内部，所述信号屏蔽结构具有多个屏蔽腔，所述输入信号线和所述输出信号线位于不同的所述屏蔽腔内。
在一些实施例中，所述介质板上设置有安装孔，所述第二连接器位于所述安装孔中，所述输出信号线包括依次连接的：第三传输部、第四传输部、第五传输部和第六传输部，所述第三传输部与所述滤波器的输出端相连，所述第六传输部与所述第二连接器相连；所述第三传输部和所述第五传输部均贯穿所述介质板，所述第六传输部和所述滤波器均设置在所述介质板的第一表面上，所述第四传输部设置在所述介质板的与所述第一表面相对的第二表面上。
在一些实施例中，所述介质板上设置有多个所述滤波器、多个所述第一连接器和多个所述第二连接器，所述第一连接器和所述第二连接器均与所述滤波器一一对应，每个所述滤波器的输入端均通过所述输入信号线与相应的所述第一连接器相连，每个所述滤波器的输出端均通过所述输出信号线与相应的所述第二连接器相连，所述信号屏蔽结构具有多个所述屏蔽腔，不同的所述滤波器所连接的输入信号线位于不同的所述屏蔽腔内。
在一些实施例中，所述滤波器的表面设置有金属层。
第二方面，本申请实施例提供一种天线装置，包括天线结构、功放结构和上述滤波组件，所述滤波组件的第一连接器与所述功放结构相连，所述滤波组件的第二连接器与所述天线结构相连。
第三方面，本申请实施例提供一种基站系统，包括上述天线装置。
附图说明
附图是用来提供对本申请的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本申请，但并不构成对本申请的限制。在附图中：
图1为在一些情形中金属化滤波器与天线和功放模块的连接示意图；
图2a为在一些情形中介质滤波器设置在移相网络上的仰视图；
图2b为在一些情形中介质滤波器与天线结构和功放结构连接的剖视图；
图3a为本申请实施例提供的滤波组件的第一种结构的剖视图；
图3b为本申请实施例提供的滤波组件的第一种结构的俯视图；
图3c为本申请实施例提供的滤波组件的第一种结构的立体图；
图4为本申请实施例提供的滤波组件的第二种结构的剖视图；
图5a为本申请实施例提供的滤波组件的第三种结构的剖视图；
图5b为本申请实施例提供的滤波组件的第三种结构的俯视图；
图5c为本申请实施例提供的滤波组件的第三种结构的立体图；
图6a为本申请实施例提供的滤波组件的第四种结构的立体图之一；
图6b为本申请实施例提供的滤波组件的第四种结构的立体图之二；
图7为本申请实施例提供的天线装置的结构示意图。
具体实施方式
以下结合附图对本申请的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请，并不用于限制本申请。
滤波器是基站系统中的重要结构，滤波器连接在天线模块与功放模块之间。其中，滤波器可以采用小型金属化滤波器或介质滤波器。图1为在一些情形中金属化滤波器与天线和功放模块的连接示意图，如图1所示，金属化滤波器101通过设置在其上的连接器102与功放结构103和天线结构104连接。但是由于金属化滤波器101的重量和体积较大，从而导致整机结构的体积和重量均较大，难以提升基站系统的竞争力。图2a为在一些情形中介质滤波器设置在移相网络上的仰视图，图2b为在一些情形中介质滤波器与天线结构和功放结构连接的剖视图，结合图2a和图2b所示，介质滤波器201直接表贴在移相网络202表面，通过移相网络202和馈电层203与天线结构104相连，并通过移相网络202、连接结构205与功放结构103连接，图2a中的203a为馈电层203的输入端，图2a中虚线框为金属屏蔽盖的边界。为了防止功放结构103的杂散信号过强而影响介质滤波器201的性能，增加了金属屏蔽盖204，而金属屏蔽盖204的设置增大了整机的体积。
作为本申请的一方面，提供一种滤波组件，图3a为本申请实施例提供的滤波组件的第一种结构的剖视图，图3b为本申请实施例提供的滤波组件的第一种结构的俯视图，图3c为本申请实施例提供的滤波组件的第一种结构的立体图，结合图3a至图3c所示，滤波组件包括介质板302，介质板302上设置有滤波器301、第一连接器303和第二连接器304，介质板302内部设置有输入信号线305，输入信号线305的一端与滤波器301的输入端301a相连，输入信号线305的另一端与第一连接器303相连，第一连接器303用于连接功放结构；滤波器301的输出端301b通过输出信号线306与第二连接器304相连。滤波组件还包括信号屏蔽结构307，信号屏蔽结构307具有屏蔽腔，介质板302的至少一部分和输入信号线305位于屏蔽腔内，输出信号线306位于输入信号线305所在的屏蔽腔外。例如，信号屏蔽结构307具有多个屏蔽腔，输出信号线306和输入信号线305位于不同的屏蔽腔，或者，输出信号线306未处于任意一个屏蔽腔内。滤波器301可以位于屏蔽腔之外。
需要说明的是，信号屏蔽结构307的屏蔽腔并不是一个空腔，而是可以被介质板302的至少一部分填充。
其中，介质板302的材料并不做特别限定，只要是介质材料即可。具体地，介质板302可以为PCB(Printed Circuit Board，印制电路板)，也可以为塑料板。作为本申请的一种具体实施方式，介质板302为塑料板，以降低成本。在实际生产中，可以通过注塑一体化工艺将输入信号线305埋在介质板302内。
滤波器301尤其可以为介质滤波器301，其通过表贴工艺(Surface Mount Technology， SMT)设置在介质板302的第一表面，滤波器301的输入端301a和输出端301b均朝向介质板302。
在本申请实施例中，滤波器301的输入端301a通过输入信号线305和第一连接器303接收功放结构的输出信号，而由于输入信号线305位于信号屏蔽结构307的屏蔽腔内，输出信号线306位于输入信号线305所在屏蔽腔之外，因此可以防止功放结构输出的较强杂散信号从空间直接泄漏到滤波器301的输出，从而防止滤波器输入输出的隔离度降低，进而防止滤波器301的性能受到影响。并且，由于输入信号线305埋在介质板302内，介质板302的至少一部分位于屏蔽腔内，因此，位于屏蔽腔内的介质板302可以将输入信号线305和信号屏蔽结构307间隔开，信号屏蔽结构307无需在介质板302外部额外占用过多的空间，例如，将信号屏蔽结构307设置为包围介质板302、且贴附在介质板302表面的结构，或者，将信号屏蔽结构307设置在介质板302内部均可，从而减小滤波组件的体积，进而减小整机结构的体积。
下面结合图3a至图3c对本申请实施例的滤波组件的第一种结构进行介绍。如图3a至图3c所示，滤波器301的输入端301a通过输入信号线305与第一连接器303相连，滤波器301的输出端301b通过输出信号线306与第二连接器304相连。滤波组件的第一连接器303用于连接功放结构，第二连接器304用于连接天线结构。第一连接器303和第二连接器304均采用常用的射频信号连接器，作为本申请的一种具体实施方式，第一连接器303和第二连接器304可以采用滑动端直式ZSMP射频信号连接器，但应当理解的是，第一连接器303和第二连接器304也可以采用其他连接器，在此不做限制。
第一连接器303和滤波器301位于介质板302的同侧，二者均位于介质板302的第一表面；第二连接器304设置在介质板302的第二表面上，第一表面和第二表面相对。其中，第一连接器303、第二连接器304和滤波器301可以均通过表贴工艺设置在介质板302的表面。
滤波器301的输入端301a通过输入信号线305与第一连接器303的底端相连，滤波器301的输出端301b通过输出信号线306与第二连接器304的底端相连，第一连接器303的顶端和第二连接器304的顶端均设置有插拔部，第一连接器303的插拔部用于与功放结构的连接器盲插连接，第二连接器304的插拔部用于与天线结构的连接器插拔连接。可以看出，第一连接器303和第二连接器304在滤波组件中的位置与图1中金属化滤波器101中的两个连接器位置相同，从而使得该滤波组件可以用于金属化滤波器301所在的天线装置中，从而在整机中既可以使用金属化滤波器，也可以使用介质滤波器。
输出信号线306具体可以包括第一传输部306a和第二传输部306b，第一传输部306a贯穿介质板302，即，第一传输部306a为金属化过孔，第一传输部306a的一端与滤波器301相连，第一传输部306a的另一端与第二传输部306b的一端相连，第二传输部306b的另一端与第二连接器304相连。其中，第二传输部306b和第二连接器304位于介质板302 的同侧，二者均位于介质板302的第二表面上。在本申请实施例中，第二传输部306b采用微带线的形式，从而简化加工工艺，提高加工精度。微带线形式的第二传输部306b可以通过镭雕或刻蚀工艺制作，从而贴覆在介质板302上。
信号屏蔽结构307包括：第一屏蔽部307a和第二屏蔽部307b，第一屏蔽部307a为位于介质板302的表面的金属膜层，该金属膜层可以通过电镀工艺形成在介质板302表面。第二屏蔽部307b穿过介质板302，且位于输入信号线305与输出信号线306之间，第一屏蔽部307a和第二屏蔽部307b围成屏蔽腔。其中，第二屏蔽部307b可以防止输入信号线305和输出信号线306之间发生信号干扰。
需要说明的是，屏蔽腔并不一定是完全密封的，只要可以起到信号屏蔽作用即可。
其中，滤波器301的表面设置有金属层。第一屏蔽部307a可以在与输出信号线306绝缘间隔的前提下尽量增大覆盖面积，从而在一定程度上防止外界信号对输出信号造成干扰。如图3a中，介质板302的第一表面被第一屏蔽部307a和滤波器301覆盖，而滤波器301表面的金属层也起到信号屏蔽的作用，因此，第一屏蔽部307和滤波器301也可以防止功放结构的杂散信号辐射至天线结构中。介质板302上设置有过孔，第二屏蔽部307b包括位于过孔内的金属件。
在一些示例中，过孔的数量为多个，多个过孔彼此间隔，从而防止介质板发生断裂。第二屏蔽部307b可以包括分别位于多个过孔中的多个金属件。需要说明的是，多个过孔沿图3a中垂直于纸面的方向排列，图3a所示意的剖视图为经过其中一个过孔所在的位置进行纵向剖切得到的，因此，图3a中并未示出多个过孔。另外，相邻的过孔之间具有间隔，但应当理解的是，该间隔不宜过大，以保证第二屏蔽部307的信号屏蔽作用。
图4为本申请实施例提供的滤波组件的第二种结构的剖视图，图4所示的结构与图3a所示的结构类似，下面仅对两种结构的区别进行介绍。在图4所示的结构中，输出信号线306位于介质板302内部。其中，输入信号线305和输出信号线306均可以采用注塑工艺预埋在介质板302内。这种情况下，信号屏蔽结构307可以具有多个屏蔽腔，输入信号线305和输出信号线306位于不同的屏蔽腔内。具体地，信号屏蔽结构同样包括第一屏蔽部307a和第二屏蔽部307b，与图3a不同的是，图4中的第一屏蔽部307a在介质板302上所覆盖的范围更大，介质板302表面上除滤波器301、第一连接器303、第二连接器304所在区域外的部分均被第一屏蔽部307a覆盖，第一屏蔽部307a和第二屏蔽部307b限定出对应于输入信号线305的屏蔽腔和对应于输出信号线306的屏蔽腔。
图5a为本申请实施例提供的滤波组件的第三种结构的剖视图，图5b为本申请实施例提供的滤波组件的第三种结构的俯视图，图5c为本申请实施例提供的滤波组件的第三种结构的立体图，滤波组件的第三种结构与上述第一种结构类似，下面仅对两种结构的区别进行介绍。在图5a至图5c所示的结构中，介质板302上设置有安装孔，第二连接器304位于安装孔中。具体地，可以通过注塑工艺将第二连接器304嵌入介质板302。输出信号 线306包括依次连接的：第三传输部306c、第四传输部306d、第五传输部306e和第六传输部306f，第三传输部306c与滤波器301的输出端301b相连，第六传输部306f与第二连接器304相连。
第三传输部306c和第五传输部306e均贯穿介质板302。第六传输部306f和滤波器301均设置在介质板302的第一表面上，第四传输部306d设置在介质板302的与第一表面相对的第二表面上。第六传输部306f和第四传输部306d均可以采用微带线形式。
在图5a至图5c所示的结构中，第二连接器304可以通过注塑与电镀一体化工艺实现，用注塑材料在模塑中直接包裹第二连接器304，实现第二连接器304在介质板302中的固定，这种方式可以减少表贴工序，同时可以降低成本。
图6a为本申请实施例提供的滤波组件的第四种结构的立体图之一，图6b为本申请实施例提供的滤波组件的第四种结构的立体图之二，第四种结构与上述第一种结构类似，下面仅对两种结构的区别进行介绍。在图6a和图6b所示的结构中，介质板302上设置有多个滤波器301、多个第一连接器303和多个第二连接器304，第一连接器303、第二连接器304均与滤波器301一一对应，每个滤波器301的输入端均通过输入信号线与相应的第一连接器303相连，每个滤波器301的输出端均通过输出信号线306与相应的第二连接器304相连。应当理解的是，不同滤波器301所连接的输入信号线305是不同的，不同滤波器301所连接的输出信号线306也是不同的。
输入信号线和输出信号线可以按照图3a、图4、图5a中所示的任意一种方式进行设置，在此不再赘述。
在这种情况下，信号屏蔽结构具有多个屏蔽腔，不同的滤波器301所连接的输入信号线位于不同的屏蔽腔中，以防止不同滤波器301接收到的信号发生干扰。其中，屏蔽腔可以与滤波器一一对应，使得每个滤波器所连接的输入信号线均位于相应的屏蔽腔中，而输出信号线位于屏蔽腔之外；当然，也可以将屏蔽腔的数量设置为滤波器数量的两倍，每个滤波器连接的输入信号线和输出信号线均对应不同的屏蔽腔中。不同滤波器301所连接的输入信号线之间可以设置上述第二屏蔽部。
其中，滤波器301可以按照实际需要进行排列，例如，排成一行，或者排成多行多列。多个滤波器301设置在同一个介质板302上，整个介质板302一体注塑成型，可以减小模具成本，并可以减少后期整机装配时间，提升生产效率。
作为本申请的另一方面，提供一种天线装置，图7为本申请实施例提供的天线装置的结构示意图，如图7所示，天线装置包括天线结构400、功放结构401和上述实施例提供的滤波组件。其中，滤波组件的第一连接器303与功放结构401相连，天线结构400用于接收滤波器301的输出端301b输出的信号。具体地，滤波组件的第二连接器304与天线结构400相连。
具体地，功放结构401可以包括功放有源板401a和设置在功放有源板401a上的第三 连接器401b，天线结构400包括多个天线单元和与天线单元400a电连接的第四连接器400b，滤波组件的第一连接器303与第三连接器401b相连，滤波组件的第二连接器304与第四连接器400b相连。天线结构400和功放结构401分别位于介质板302的相对两侧。
应当理解的是，天线装置还可以包括移相网络(图中未示出)，其可以与天线单元设置在同一信号板上。
在本申请实施例提供的天线装置中，滤波组件的体积较小，从而可以减小天线装置的体积，并且，滤波器设置在介质板上，不会影响移相网络的布局，简化设计。
作为本申请的再一方面，提供一种基站系统，包括上述天线装置。
在本申请实施例提供的基站系统中，滤波组件的体积较小，从而可以减小天线装置的体积，进而减小整个基站系统的体积。
在本申请实施例提供的滤波组件、天线装置和基站系统中，滤波器的输入端所连接的输入信号线位于信号屏蔽结构的屏蔽腔内，滤波器的输出端所连接的输出信号线位于输入信号线所在的屏蔽腔外，因此可以防止功放结构输出的较强杂散信号从空间直接泄漏到滤波器的输出，从而防止滤波器输入输出的隔离度降低，进而防止滤波器的性能受到影响。且由于输入信号线埋在介质板内，介质板的至少一部分位于屏蔽腔内，因此，位于屏蔽腔内的介质板可以将输入信号线和信号屏蔽结构间隔开，信号屏蔽结构无需在介质板外部额外占用过多的空间，从而减小滤波组件的体积，进而减小整机结构的体积。
可以理解的是，以上实施方式仅仅是为了说明本申请的原理而采用的示例性实施方式，然而本申请并不局限于此。对于本领域内的普通技术人员而言，在不脱离本申请的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本申请的保护范围。

Claims (12)

  1. 一种滤波组件，包括介质板，所述介质板上设置有滤波器、第一连接器和第二连接器，所述介质板内部设置有输入信号线，所述输入信号线的一端与所述滤波器的输入端相连，所述输入信号线的另一端与所述第一连接器相连，所述滤波器的输出端通过输出信号线与所述第二连接器相连，所述滤波组件还包括信号屏蔽结构，所述信号屏蔽结构具有屏蔽腔，所述介质板的至少一部分和所述输入信号线位于所述屏蔽腔内，所述输出信号线位于所述输入信号线所在的所述屏蔽腔外。
  2. 根据权利要求1所述的滤波组件，其中，所述信号屏蔽结构包括：第一屏蔽部和第二屏蔽部，所述第一屏蔽部为位于所述介质板的表面的金属膜层，所述第二屏蔽部穿过所述介质板，且位于所述输入信号线与所述输出信号线之间，所述第一屏蔽部和所述第二屏蔽部围成所述屏蔽腔。
  3. 根据权利要求2所述的滤波组件，其中，所述介质板上设置有过孔，所述第二屏蔽部包括位于所述过孔内的金属件。
  4. 根据权利要求3所述的滤波组件，其中，所述介质板上设置有多个所述过孔，多个所述过孔彼此间隔，所述第二屏蔽部包括分别位于多个所述过孔内的多个所述金属件。
  5. 根据权利要求1至4中任意一项所述的滤波组件，其中，所述滤波器与所述第一连接器位于所述介质板的同侧，所述第二连接器与所述滤波器分别设置在所述介质板的两个相对的表面上。
  6. 根据权利要求5所述的滤波组件，其中，所述输出信号线包括第一传输部和第二传输部，所述第一传输部穿过所述介质板，所述第一传输部的一端与所述滤波器的输出端相连，所述第一传输部的另一端与所述第二传输部的一端相连，所述第二传输部的另一端与所述第二连接器相连，所述第二传输部与所述第二连接器位于所述介质板的同侧。
  7. 根据权利要求5所述的滤波组件，其中，所述输出信号线位于所述介质板内部，所述信号屏蔽结构具有多个屏蔽腔，所述输入信号线和所述输出信号线位于不同的所述屏蔽腔内。
  8. 根据权利要求1至4中任意一项所述的滤波组件，其中，所述介质板上设置有安装孔，所述第二连接器位于所述安装孔中，所述输出信号线包括依次连接的：第三传输部、第四传输部、第五传输部和第六传输部，所述第三传输部与所述滤波器的输出端相连，所述第六传输部与所述第二连接器相连；
    所述第三传输部和所述第五传输部均贯穿所述介质板，所述第六传输部和所述滤波器均设置在所述介质板的第一表面上，所述第四传输部设置在所述介质板的与所述第一表面相对的第二表面上。
  9. 根据权利要求1至4中任意一项所述的滤波组件，其中，所述介质板上设置有多个所述滤波器、多个所述第一连接器和多个所述第二连接器，所述第一连接器和所述第二 连接器均与所述滤波器一一对应，每个所述滤波器的输入端均通过所述输入信号线与相应的所述第一连接器相连，每个所述滤波器的输出端均通过所述输出信号线与相应的所述第二连接器相连，
    所述信号屏蔽结构具有多个所述屏蔽腔，不同的所述滤波器所连接的输入信号线位于不同的所述屏蔽腔内。
  10. 根据权利要求1至4中任意一项所述的滤波组件，其中，所述滤波器的表面设置有金属层。
  11. 一种天线装置，包括天线结构、功放结构和权利要求1至10中任意一项所述的滤波组件，其中，所述滤波组件的第一连接器与所述功放结构相连，所述滤波组件的第二连接器与所述天线结构相连。
  12. 一种基站系统，包括权利要求11所述的天线装置。
PCT/CN2020/129795 2019-11-21 2020-11-18 滤波组件、天线装置和基站系统 WO2021098726A1 (zh)

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