WO2016106635A1 - 腔体滤波器、双工器、信号收发装置、射频拉远设备和塔顶放大器 - Google Patents

腔体滤波器、双工器、信号收发装置、射频拉远设备和塔顶放大器 Download PDF

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Publication number
WO2016106635A1
WO2016106635A1 PCT/CN2014/095797 CN2014095797W WO2016106635A1 WO 2016106635 A1 WO2016106635 A1 WO 2016106635A1 CN 2014095797 W CN2014095797 W CN 2014095797W WO 2016106635 A1 WO2016106635 A1 WO 2016106635A1
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WO
WIPO (PCT)
Prior art keywords
cavity
hole
cover plate
tuning screw
conductive member
Prior art date
Application number
PCT/CN2014/095797
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English (en)
French (fr)
Inventor
杨绍春
徐晓亮
Original Assignee
深圳市大富科技股份有限公司
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
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Application filed by 深圳市大富科技股份有限公司 filed Critical 深圳市大富科技股份有限公司
Priority to CN201480084398.XA priority Critical patent/CN107112615B/zh
Priority to PCT/CN2014/095797 priority patent/WO2016106635A1/zh
Publication of WO2016106635A1 publication Critical patent/WO2016106635A1/zh

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Classifications

    • 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

Definitions

  • the utility model relates to the field of communication equipment, in particular to a cavity filter, a duplexer, a signal transceiver device, a radio frequency remote device and a tower top amplifier.
  • the cavity filter is widely used in the field of communications as a frequency selection device, especially in the field of radio frequency communication.
  • a filter is used to select a communication signal to filter out clutter or interference signals outside the frequency of the communication signal.
  • the existing cavity filter generally comprises a cavity and a cover plate, the cover cover cavity forms a resonant cavity, the bottom wall of the cavity is fixed with a hollow resonant column, and the cover plate is provided with a tuning screw threadedly connected thereto, and is tuned The screw protrudes toward the resonance column.
  • the tuning screw By turning the tuning screw, the distance between the tuning screw and the resonant column can be adjusted to adjust the parameters of the cavity filter. Due to the full thread connection between the tuning screw and the cover plate, there is a gap between the tuning screw and the cover plate, and electromagnetic waves propagate on the inner surface of the cover plate or the cavity, so that electromagnetic waves may be drilled between the tuning screw and the cover plate.
  • the gap which runs outside the cavity filter, causes the loss of the electromagnetic signal, which in turn affects the intermodulation index of the cavity filter.
  • One solution of the prior art is to leave a non-tapping hole at the end close to the cavity when the tapping hole is tapped, that is, to leave a hole.
  • the tuning screw can maintain close contact with the cover plate so that the electromagnetic signal does not leak through the gap between the tuning screw and the cover.
  • the length of the aperture is not well controlled, and it is too short to prevent leakage of the electromagnetic signal. Too long, the tuning screw needs to overcome the resistance of the aperture section to be too large to protrude into the cavity.
  • the technical problem solved by the utility model is to provide a cavity filter, a duplexer, a signal transceiving device, a radio frequency remote device and a tower top amplifier which can prevent electromagnetic signal leakage and simple processing.
  • the utility model provides a cavity filter, which comprises a cavity and a cover plate, and the cover cover cavity forms a plurality of cascaded resonant cavities, and the plurality of cascaded resonant cavities are arranged
  • the isolation ribs on the cavity or the cover plate are spaced apart, and a resonance column is fixed at the bottom of the cavity, and the cover plate is provided with a tuning screw protruding toward the resonance column, and the cover plate is provided with a through hole, and the through hole includes a cavity away from the cavity.
  • the outer peripheral surface of the tuning screw opposite to the optical hole is provided with a groove, and the elastic conductive member is embedded in the groove.
  • the through hole is stepped, the diameter of the optical hole is larger than the diameter of the threaded hole, and the tuning screw is provided with a ring boss, and the boss abuts the elastic conductive member on the step surface connecting the optical hole and the threaded hole.
  • the elastic conductive member is a conductive silicone gasket.
  • the side of the cover plate away from the cavity is provided with a nut sleeved on the tuning screw, and the spiral direction of the nut is opposite to the spiral direction of the threaded hole of the cover plate.
  • a gasket is arranged between the nut and the cover.
  • a side of the cover plate away from the cavity is provided with a mounting boss extending perpendicular to the cover plate, and the through hole is disposed in the mounting boss.
  • the utility model also provides a cavity filter, comprising a cavity and a cover plate, the cover cover cavity forming a plurality of cascaded resonant cavities, and the plurality of cascaded resonant cavities are set
  • the spacers on the cavity or the cover are spaced apart, and the resonant column is fixed on the cover plate, and the inner side of the bottom of the cavity is provided with a tuning screw protruding toward the resonant column, and a through hole is formed in the bottom of the cavity, the through hole
  • the utility model comprises a threaded hole away from one end of the cover plate and a light hole close to one end of the cover plate, a screw connection between the tuning screw and the threaded hole, an annular elastic conductive member between the tuning screw and the light hole, and an inner circumferential surface of the elastic conductive member An interference fit between the outer peripheral surface of the elastic conductive member and the optical hole is provided in an interference fit with the tuning screw.
  • the outer peripheral surface of the tuning screw opposite to the optical hole is provided with a groove, and the elastic conductive member is embedded in the groove.
  • the through hole is stepped, the diameter of the optical hole is larger than the diameter of the threaded hole, and the tuning screw is provided with a ring boss, and the boss abuts the elastic conductive member on the step surface connecting the optical hole and the threaded hole.
  • the elastic conductive member is a conductive silicone gasket.
  • the outer side of the bottom of the cavity away from the cover plate is provided with a nut sleeved on the tuning screw, and the spiral direction of the nut is opposite to the spiral direction of the threaded hole at the bottom of the cavity.
  • a gasket is arranged between the nut and the bottom of the cavity.
  • the outer side of the bottom of the cavity is provided with a mounting boss extending perpendicularly to the bottom of the cavity, and the through hole is disposed in the mounting boss.
  • the present invention also provides a duplexer including a receiving filter and a transmitting filter, the receiving filter is connected between the receiving terminal and the antenna terminal, and the transmitting filter is connected to the transmitting terminal and the antenna terminal. Between them, the receiving filter and the transmitting filter are the aforementioned cavity filters.
  • the utility model also provides a radio frequency remote device, comprising a radio frequency transceiver module, a power amplifier module and the foregoing duplexer, the radio frequency transceiver module is connected with the power amplifier module, the power amplifier module and the duplex Connected.
  • the present invention further provides a signal transceiving device, comprising the aforementioned duplexer, connected to a receiving antenna, and selecting a received signal;
  • An RF low noise amplifier connected to the signal output of the duplexer
  • An RF power amplifier the input end is connected to the signal output end of the combiner, and the output end is connected to the duplexer;
  • the transmitting antenna receives the output signal of the duplexer and transmits the signal.
  • the present invention also provides a tower top amplifier including a low noise amplifier and a band pass filter, and the band pass filter is the aforementioned duplexer.
  • the utility model has the beneficial effects that the through hole on the cover plate is arranged to include a threaded hole away from one end of the cavity and a light hole close to one end of the cavity, and the threaded connection between the tuning screw and the threaded hole, the tuning screw and the light hole
  • An annular elastic conductive member is disposed between the inner peripheral surface of the elastic conductive member and the tuning screw, and an interference fit is formed between the outer peripheral surface of the elastic conductive member and the optical hole, so that the elastic conductive member can not only close the tuning
  • the gap between the screw and the cover plate ensures the smooth transmission of the electromagnetic signal, and it is not necessary to ensure the length of the polished rod section of the tuning screw as in the prior art, so that the processing of the cavity filter becomes simpler.
  • FIG. 1 is a schematic structural view of a cavity filter according to a first embodiment of the present invention
  • FIG. 2 is a schematic structural view of a cavity filter according to a second embodiment of the present invention.
  • FIG. 3 is a schematic structural view of a cavity filter according to a third embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a cavity filter according to a fourth embodiment of the present invention.
  • FIG. 5 is a schematic structural view of a duplexer according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural view of a radio remote device according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a signal transceiving device according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural view of a tower amplifier according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural view of a connection fixing device according to a first embodiment of the present invention.
  • the cavity filter 10 includes a cavity 11 and a cover plate 12.
  • the cover 12 encloses the cavity 11 to form a plurality of cascaded resonant cavities, and the plurality of cascaded resonant cavities are disposed in the cavity.
  • a resonant column 13 is disposed in the resonant cavity
  • the cover 12 is provided with a tuning screw 14 extending toward the resonant column
  • the cover 12 is provided with a through hole 15 and a through hole 15 includes a threaded hole 151 away from one end of the cavity 11 and a light hole 152 near the end of the cavity 11, a screw connection between the tuning screw 14 and the threaded hole 151, and an annular elasticity between the tuning screw 14 and the light hole 152
  • the conductive member 16 has an interference fit between the inner peripheral surface of the elastic conductive member 16 and the tuning screw 14, and an interference fit between the outer peripheral surface of the elastic conductive member 16 and the optical hole 152. This can effectively prevent the generation of gaps and holes, improve the RF intermodulation index, avoid the problem of processing difficulties, and improve the yield.
  • the outer peripheral surface of the tuning screw 14 opposite to the light hole 152 is provided with a groove 141 in which the elastic conductive member 16 is fitted.
  • a side of the cover plate 12 remote from the cavity 11 is provided with a nut 17 sleeved on the tuning screw 14, and the helical direction of the nut 17 is opposite to the helical direction of the threaded hole 152 of the cover plate 12.
  • a spacer 18 is provided between the nut 17 and the cover plate 12 for locking the cover plate 12 and the tuning screw 14.
  • a side of the cover plate 12 remote from the cavity 11 is provided with a mounting boss 19 extending perpendicularly to the cover plate 12, and the through hole 15 is provided in the mounting boss 19.
  • the cavity filter 20 includes a cavity 21 and a cover plate 22, and the cover 22 covers the cavity 21 to form a plurality of cascaded resonant cavities, and the plurality of cascaded resonant cavities are disposed in the cavity.
  • a resonant column 23 is disposed in the resonant cavity
  • the cover 22 is provided with a tuning screw 24 extending toward the resonant column
  • the cover 22 is provided with a through hole 25
  • a through hole 25 is stepped, including a threaded hole 251 away from one end of the cavity and a light hole 252 near one end of the cavity, and the tuning screw 24 is screwed with the threaded hole 251.
  • the annular elastic conductive member 26 is disposed between the tuning screw 24 and the optical hole 252, and an interference fit between the inner circumferential surface of the elastic conductive member 26 and the tuning screw 24 is between the outer peripheral surface of the elastic conductive member 26 and the optical hole 152.
  • the elastic conductive member 26 is a conductive silicone gasket.
  • a side of the cover plate 22 remote from the cavity is provided with a nut 28 sleeved on the tuning screw 24, and the helical direction of the nut 28 is opposite to the helical direction of the threaded hole 251 of the cover plate 22.
  • the diameter of the light hole 252 is larger than the diameter of the threaded hole 251.
  • the tuning screw 24 is provided with a ring boss 27, and the boss 27 abuts the elastic conductive member 26 on the step surface of the connecting light hole 252 and the screw hole 251, and the tuning screw 24 When rotated, the resilient conductive member 26 mates with the boss 27.
  • a spacer 29 is provided between the nut 28 and the cover plate 22 for locking the cover plate 22 and the tuning screw 24.
  • the cavity filter 30 includes a cavity 31 and a cover plate 32.
  • the cover 32 encloses the cavity 31 to form a plurality of cascaded resonant cavities, and the plurality of cascaded resonant cavities are disposed in the cavity.
  • the through hole 35 includes a threaded hole 351 away from one end of the cover plate 32 and a light hole 352 near the end of the cover plate 32.
  • the tuning screw 34 is screwed with the threaded hole 351, and the tuning screw 34 and the light hole 352 are disposed.
  • An annular elastic conductive member 36 has an interference fit between the inner peripheral surface of the elastic conductive member 36 and the tuning screw 34, and an interference fit between the outer peripheral surface of the elastic conductive member 36 and the optical hole 352. This can effectively prevent the generation of gaps and holes, improve the RF intermodulation index, avoid the problem of processing difficulties, and improve the yield.
  • the outer peripheral surface of the tuning screw 34 opposite to the optical hole 352 is provided with a ring groove 341, and the elastic conductive member 36 is embedded in the groove 341.
  • the elastic conductive member 36 is a conductive silicone gasket.
  • the outer side of the bottom of the cavity 31 away from the cover 32 is provided with a nut 37 sleeved on the tuning screw 34.
  • the helical direction of the nut 37 is opposite to the helical direction of the threaded hole 352 of the cover 32.
  • a spacer 38 is provided between the nut 37 and the cover plate 32 for locking the cover plate 32 and the tuning screw 34.
  • the outer side of the bottom of the cavity 31 is provided with a mounting boss 39 extending perpendicularly to the bottom of the cavity 31, and the through hole 35 is disposed in the mounting boss 39.
  • the cavity filter 40 includes a cavity 41 and a cover plate 42.
  • the cover 42 covers the cavity 41 to form a plurality of cascaded resonant cavities, and the plurality of cascaded resonant cavities are disposed in the cavity. 41 or the spacers on the cover 42 are spaced apart, the cover 42 is fixed with a resonant column 43.
  • the inner side of the bottom of the cavity 41 is provided with a tuning screw 44 extending toward the resonant column, and the bottom of the cavity 41 is provided with a pass.
  • the hole 45 has a stepped shape, and includes a threaded hole 451 away from one end of the cover 42 and a light hole 452 near the end of the cover 42.
  • the tuning screw 44 is screwed with the threaded hole 451.
  • the annular elastic conductive member 46 is disposed between the tuning screw 44 and the optical hole 452, and an interference fit between the inner circumferential surface of the elastic conductive member 46 and the tuning screw 44 is between the outer peripheral surface of the elastic conductive member 46 and the optical hole 452. Interference fit.
  • the elastic conductive member 46 is a conductive silicone gasket.
  • the outer side of the bottom of the cavity 41 away from the cover 42 is provided with a nut 48 sleeved on the tuning screw 44.
  • the helical direction of the nut 48 is opposite to the helical direction of the threaded hole 451 at the bottom of the cavity 41.
  • the diameter of the optical hole 452 is larger than the diameter of the screw hole 451.
  • the tuning screw 44 is provided with a ring boss 47. The boss 47 abuts the elastic conductive member 46 on the step surface of the connecting optical hole 452 and the screw hole 451, and the tuning screw 44 is provided. When rotated, the resilient conductive member 46 mates with the boss 47.
  • a spacer 49 is provided between the nut 48 and the bottom of the cavity 41 for locking the cavity bottom 41 and the tuning screw 44.
  • FIG. 5 is a schematic structural view of a duplexer according to an embodiment of the present invention.
  • the duplexer 50 includes a reception filter 51 and a transmission filter 52.
  • the reception filter 51 is connected between the reception terminal 53 and the antenna terminal 54
  • the transmission filter 52 is connected to the transmission terminal 55 and the antenna terminal 53.
  • Between the receiving filter 51 and the transmitting filter 52 are any of the cavity filters of FIGS. 1-4.
  • FIG. 6 is a schematic structural diagram of a radio remote device according to an embodiment of the present invention.
  • the radio remote device 60 includes a radio frequency transceiver module 61, a power amplifier module 62, a power module 63, and the aforementioned duplexer 60.
  • the radio frequency transceiver module 61 is connected to the power amplifier module 62, and the power amplifier module 62 and the duplexer are connected.
  • the device 50 is connected.
  • the power module 63 provides power to the various components of the remote radio device 60.
  • FIG. 7 is a schematic structural diagram of a signal transceiving device according to an embodiment of the present invention.
  • the signal transceiving device 70 includes the aforementioned duplexer 50, is connected to the receiving antenna 74, and selects a received signal; the RF low noise amplifier 71 is connected to the signal output end of the duplexer 50; The unit 73 is connected to the signal output end of the low noise amplifier 71; the combiner 76 is connected to the circulator 73; the RF power amplifier 72 has an input terminal connected to the signal output end of the combiner 76, and an output terminal and a duplexer. 50 is connected; the transmitting antenna 75 receives the output signal of the duplexer 50 and transmits the signal.
  • FIG. 8 is a schematic structural view of a tower amplifier according to an embodiment of the present invention.
  • the tower amplifier 80 includes a low noise amplifier 81 and a band pass filter 82.
  • the signal received by the antenna terminal 83 passes through the band pass filter 82, is amplified by the signal at the low noise amplifier 81, filtered by the green band pass filter 82, and then transmitted to the subsequent signal processing unit 84 for processing.
  • the subsequent signal processing unit 84 processes the signal to be transmitted, filters it by the band pass filter 82, and then transmits it through the antenna terminal 83.
  • the band pass filter 81 is the duplexer 50 shown in FIG.
  • the cavity filter provided by the utility model has the through hole on the cover plate arranged to include a threaded hole away from one end of the cavity and a light hole near one end of the cavity, and the thread between the tuning screw and the threaded hole.
  • An annular elastic conducting member is disposed between the tuning screw and the optical hole, and an interference fit is formed between the inner peripheral surface of the elastic conductive member and the tuning screw, and an interference fit between the outer peripheral surface of the elastic conductive member and the optical hole is performed.
  • the elastic conductive member can not only close the gap between the tuning screw and the cover plate, but also ensure the smooth transmission of the electromagnetic signal, and does not need to ensure the length of the polished rod segment of the tuning screw, so that the processing of the cavity filter becomes simpler.

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Abstract

一种腔体滤波器、双工器、信号收发装置、射频拉远设备和塔顶放大器，能够防止电磁信号泄露，且加工简单。腔体滤波器包括：腔体和盖板，盖板封盖腔体形成多个级联的谐振腔，多个级联的谐振腔由设置在腔体或者盖板上的隔离筋间隔开来，谐振腔内设有谐振柱，盖板上设有朝谐振柱伸出的调谐螺杆，盖板上设有通孔，通孔包括远离腔体的一端的螺纹孔和靠近腔体一端的光孔，调谐螺杆与螺纹孔之间螺纹连接，调谐螺杆与光孔之间设有环状的弹性导电件，弹性导电件的内周面与所述调谐螺杆过盈配合，弹性导电件的外周面与光孔之间过盈配合。

Description

腔体滤波器、双工器、信号收发装置、射频拉远设备和塔顶放大器
【技术领域】
本实用新型涉及通信设备领域，具体涉及一种腔体滤波器、双工器、信号收发装置、射频拉远设备和塔顶放大器。
【背景技术】
腔体滤波器作为一种频率选择装置被广泛应用于通信领域，尤其是射频通信领域。在基站中，滤波器用于选择通信信号，滤除通信信号频率外的杂波或干扰信号。
现有的腔体滤波器一般包括腔体和盖板，盖板封盖腔体形成谐振腔，腔体底壁固定有空心的谐振柱，盖板上设有与之螺纹连接的调谐螺杆，调谐螺杆朝谐振柱伸出。转动调谐螺杆，就可以调整调谐螺杆与谐振柱之间的距离，以调节腔体滤波器的参数。由于调谐螺杆与盖板之间全螺纹连接，调谐螺杆和盖板之间会存在空隙，而电磁波在盖板或者腔体的内表面传播，这样电磁波就可能钻入调谐螺杆和盖板之间的空隙，跑到腔体滤波器之外，造成电磁信号的损耗，进而影响腔体滤波器的互调指标。
现有技术的一种解决方案是给盖板攻螺纹孔时，在靠近腔体的一端留置一段不攻螺纹孔，即留一段光孔。这样调谐螺杆就可以保持与盖板的紧密接触，使得电磁信号不会通过调谐螺杆和盖板之间的间隙泄露。但是光孔的长度不好控制，留得太短，不足以防止电磁信号的泄露，留的过长，调谐螺杆需要克服光孔段的阻力过大，以致不能伸入到腔体内。
【发明内容】
本实用新型解决的技术问题是，提供一种能够防止电磁信号泄露且加工简单的腔体滤波器、双工器、信号收发装置、射频拉远设备和塔顶放大器。
为解决上述技术问题，本实用新型提供了一种腔体滤波器，包括腔体和盖板，盖板封盖腔体形成多个级联的谐振腔，多个级联的谐振腔由设置在腔体或者盖板上的隔离筋间隔开来，腔体底部固定有谐振柱，盖板上设有朝谐振柱伸出的调谐螺杆，盖板上设有通孔，通孔包括远离腔体的一端的螺纹孔和靠近腔体一端的光孔，调谐螺杆与螺纹孔之间螺纹连接，调谐螺杆与光孔之间设有环状的弹性导电件，弹性导电件的内周面与所述调谐螺杆之间过盈配合，弹性导电件的外周面与光孔之间过盈配合。
其中，调谐螺杆与光孔相对的外周面设有一圈凹槽，弹性导电件嵌入凹槽内。
其中，通孔呈阶梯状，光孔的直径大于螺纹孔的直径，调谐螺杆上设有一圈凸台，凸台将弹性导电件抵接在连接光孔和螺纹孔的阶梯面上。
其中，弹性导电件为导电硅胶垫圈。
其中，盖板远离腔体的一侧设有套设在调谐螺杆上的螺母，螺母的螺旋方向和盖板的螺纹孔螺旋方向相反。
其中，螺母和盖板之间设有垫片。
其中，盖板远离腔体的一侧设置有垂直于盖板伸出的安装凸台，通孔设置在安装凸台中。
为解决上述技术问题，本实用新型还提供了一种腔体滤波器，包括腔体和盖板，盖板封盖腔体形成多个级联的谐振腔，多个级联的谐振腔由设置在腔体或者盖板上的隔离筋间隔开来，盖板上固定有谐振柱，腔体底部的内侧面设有朝谐振柱伸出的调谐螺杆，腔体底部上设有通孔，通孔包括远离盖板一端的螺纹孔和靠近盖板一端的光孔，调谐螺杆与螺纹孔之间螺纹连接，调谐螺杆与光孔之间设有环状的弹性导电件，弹性导电件的内周面与调谐螺杆之间过盈配合，弹性导电件的外周面与光孔之间过盈配合。
其中，调谐螺杆与光孔相对的外周面设有一圈凹槽，弹性导电件嵌入凹槽内。
其中，通孔呈阶梯状，光孔的直径大于螺纹孔的直径，调谐螺杆上设有一圈凸台，凸台将弹性导电件抵接在连接光孔和螺纹孔的阶梯面上。
其中，弹性导电件为导电硅胶垫圈。
其中，腔体底部远离盖板一侧的外侧面设有套设在调谐螺杆上的螺母，螺母的螺旋方向和腔体底部的螺纹孔螺旋方向相反。
其中，螺母和腔体底部之间设有垫片。
其中，腔体底部的外侧面设置有垂直于腔体底部伸出的安装凸台，通孔设置在安装凸台中。
为解决上述技术问题，本实用新型还提供了一种双工器，包括接收滤波器和发射滤波器，接收滤波器连接在接收端子和天线端子之间，发射滤波器连接在发送端子与天线端子之间，其特征在于，接收滤波器和发射滤波器为前述的腔体滤波器。
为解决上述技术问题，本实用新型还提供了一种射频拉远设备，包括射频收发信机模块、功放模块以及前述的双工器，射频收发信机模块与功放模块连接，功放模块与双工器连接。
为解决上述技术问题，本实用新型还提供了一种信号收发装置，包括前述的双工器，与接收天线相连接，并对接收信号进行选择；
射频低噪声放大器，与双工器的信号输出端连接；
环行器，与低噪声放大器的信号输出端连接；
合路器，与环行器连接；
射频功率放大器，输入端与合路器的信号输出端相连接，输出端与双工器连接；
发射天线，接收双工器的输出信号并将信号发射。
为解决上述技术问题，本实用新型还提供了一种塔顶放大器，包括低噪声放大器和带通滤波器，带通滤波器为前述的双工器。
本实用新型的有益效果是：将盖板上的通孔设置成包括远离腔体的一端的螺纹孔和靠近腔体一端的光孔，调谐螺杆与螺纹孔之间螺纹连接，调谐螺杆与光孔之间设有环状的弹性导电件，弹性导电件的内周面与调谐螺杆之间过盈配合，弹性导电件的外周面与光孔之间过盈配合，这样弹性导电件不仅能封闭调谐螺杆和盖板之间的间隙，保证电磁信号的顺利传输，而且不需要像现有技术一样保证调谐螺杆的光杆段长度，使得腔体滤波器的加工变得更为简单。
【附图说明】
图1是本实用新型第一实施例的腔体滤波器的结构示意图；
图2是本实用新型第二实施例的腔体滤波器的结构示意图；
图3是本实用新型第三实施例的腔体滤波器的结构示意图；
图4是本实用新型第四实施例的腔体滤波器的结构示意图；
图5是本实用新型实施例的双工器的结构示意图；
图6是本实用新型实施例的射频拉远设备的结构示意图；
图7是本实用新型实施例的信号收发装置的结构示意图；
图8是本实用新型实施例的塔顶放大器的结构示意图。
【具体实施方式】
请参阅图1，图1是本实用新型第一实施例的连接固定装置的结构示意图。如图1所示，腔体滤波器10包括：腔体11和盖板12，盖板12封盖腔体11形成多个级联的谐振腔，多个级联的谐振腔由设置在腔体11或者盖板12上的隔离筋间隔开来，谐振腔内设有谐振柱13，盖板12上设有朝谐振柱伸出的调谐螺杆14，盖板12上设有通孔15，通孔15包括远离腔体11的一端的螺纹孔151和靠近腔体11一端的光孔152，调谐螺杆14与螺纹孔151之间螺纹连接，调谐螺杆14与光孔152之间设有环状的弹性导电件16，弹性导电件16的内周面与调谐螺杆14之间过盈配合，弹性导电件16的外周面与光孔152之间过盈配合。如此可以有效防止间隙和空穴产生，提高射频互调指标，能够避免加工困难问题，提高良品率。
调谐螺杆14与光孔152相对的外周面设有一圈凹槽141，弹性导电件16嵌入凹槽141内。盖板12远离腔体11的一侧设有套设在调谐螺杆14上的螺母17，螺母17的螺旋方向和盖板12的螺纹孔152螺旋方向相反。螺母17和盖板12之间设有垫片18，用于锁紧盖板12和调谐螺杆14。盖板12远离腔体11的一侧设置有垂直于盖板12伸出的安装凸台19，通孔15设置在安装凸台19中。
图2是本实用新型第二实施例的腔体滤波器的结构示意图。如图2所示，腔体滤波器20包括：腔体21和盖板22，盖板22封盖腔体21形成多个级联的谐振腔，多个级联的谐振腔由设置在腔体21或者盖板22上的隔离筋间隔开来，谐振腔内设有谐振柱23，盖板22上设有朝谐振柱伸出的调谐螺杆24，盖板22上设有通孔25，通孔25呈阶梯状，包括远离腔体的一端的螺纹孔251和靠近腔体一端的光孔252，调谐螺杆24与螺纹孔251之间螺纹连接。环状的弹性导电件26设置在调谐螺杆24与光孔252之间，弹性导电件26的内周面与调谐螺杆24之间过盈配合，弹性导电件26的外周面与光孔152之间过盈配合。弹性导电件26为导电硅胶垫圈。盖板22远离腔体的一侧设有套设在调谐螺杆24上的螺母28，螺母28的螺旋方向和盖板22的螺纹孔251螺旋方向相反。光孔252的直径大于螺纹孔251的直径，调谐螺杆24上设有一圈凸台27，凸台27将弹性导电件26抵接在连接光孔252和螺纹孔251的阶梯面上，调谐螺杆24转动时，弹性导电件26与凸台27紧密配合。螺母28和盖板22之间设有垫片29，用于锁紧盖板22和调谐螺杆24。
图3是本实用新型第三实施例的腔体滤波器的结构示意图。如图3所示，腔体滤波器30包括：腔体31和盖板32，盖板32封盖腔体31形成多个级联的谐振腔，多个级联的谐振腔由设置在腔体31或者盖板32上的隔离筋间隔开来，盖板32上固定有谐振柱33，腔体31底部的内侧面设有朝谐振柱33伸出的调谐螺杆34，腔体31底部上设有通孔35，通孔35包括远离盖板32一端的螺纹孔351和靠近盖板32一端的光孔352，调谐螺杆34与螺纹孔351之间螺纹连接，调谐螺杆34与光孔352之间设有环状的弹性导电件36，弹性导电件36的内周面与调谐螺杆34之间过盈配合，弹性导电件36的外周面与光孔352之间过盈配合。如此可以有效防止间隙和空穴产生，提高射频互调指标，能够避免加工困难问题，提高良品率。
在本实用新型实施例中，调谐螺杆34与光孔352相对的外周面设有一圈凹槽341，弹性导电件36嵌入凹槽341内。弹性导电件36为导电硅胶垫圈。腔体31底部远离盖板32一侧的外侧面设有套设在调谐螺杆34上的螺母37，螺母37的螺旋方向和盖板32的螺纹孔352螺旋方向相反。螺母37和盖板32之间设有垫片38，用于锁紧盖板32和调谐螺杆34。腔体31底部的外侧面设置有垂直于腔体31底部伸出的安装凸台39，通孔35设置在安装凸台39中。
图4是本实用新型第四实施例的腔体滤波器的结构示意图。如图4所示，腔体滤波器40包括：腔体41和盖板42，盖板42封盖腔体41形成多个级联的谐振腔，多个级联的谐振腔由设置在腔体41或者盖板42上的隔离筋间隔开来，盖板42上固定有谐振柱43，腔体41底部的内侧面设有朝谐振柱伸出的调谐螺杆44，腔体41底部上设有通孔45，通孔45呈阶梯状，包括远离盖板42一端的螺纹孔451和靠近盖板42一端的光孔452，调谐螺杆44与螺纹孔451之间螺纹连接。环状的弹性导电件46设置在调谐螺杆44与光孔452之间，弹性导电件46的内周面与调谐螺杆44之间过盈配合，弹性导电件46的外周面与光孔452之间过盈配合。弹性导电件46为导电硅胶垫圈。腔体41底部远离盖板42一侧的外侧面设有套设在调谐螺杆44上的螺母48，螺母48的螺旋方向和腔体41底部的螺纹孔451螺旋方向相反。光孔452的直径大于螺纹孔451的直径，调谐螺杆44上设有一圈凸台47，凸台47将弹性导电件46抵接在连接光孔452和螺纹孔451的阶梯面上，调谐螺杆44转动时，弹性导电件46与凸台47紧密配合。螺母48和腔体41底部之间设有垫片49，用于锁紧腔体底部41和调谐螺杆44。
图5是本实用新型实施例的双工器的结构示意图。如图5所示，双工器50包括接收滤波器51和发射滤波器52，接收滤波器51连接在接收端子53和天线端子54之间，发射滤波器52连接在发送端子55与天线端子53之间，其中，接收滤波器51和发射滤波器52为图1-图4中的任一腔体滤波器。
图6是本实用新型实施例的射频拉远设备的结构示意图。如图6所示，射频拉远设备60包括射频收发机模块61、功放模块62、电源模块63以及前述的双工器60，射频收发机模块61与功放模块62连接，功放模块62与双工器50连接。电源模块63为射频拉远设备60的各组成部分提供电源。
图7是本实用新型实施例的信号收发装置的结构示意图。如图7所示，信号收发装置70包括前述的双工器50，与接收天线74相连接，并对接收信号进行选择；射频低噪声放大器71，与双工器50的信号输出端连接；环行器73，与低噪声放大器71的信号输出端连接；合路器76，与环行器73连接；射频功率放大器72，输入端与合路器76的信号输出端相连接，输出端与双工器50连接；发射天线75，接收双工器50的输出信号并将信号发射。
图8是本实用新型实施例的塔顶放大器的结构示意图。如图8所示，塔顶放大器80包括低噪声放大器81和带通滤波器82。天线端83接收的信号经过带通滤波器82后在低噪声放大器81进行信号放大，再绿带通滤波器82滤波后传输至后续信号处理单元84进行处理。后续信号处理单元84将需要发送的信号进行处理后利用带通滤波器82滤波，然后通过天线端83发送出去。其中带通滤波器81为图5所示的双工器50。
综上所述，本实用新型提供的腔体滤波器，将盖板上的通孔设置成包括远离腔体的一端的螺纹孔和靠近腔体一端的光孔，调谐螺杆与螺纹孔之间螺纹连接，调谐螺杆与光孔之间设有环状的弹性导电件，弹性导电件的内周面与调谐螺杆之间过盈配合，弹性导电件的外周面与光孔之间过盈配合，这样弹性导电件不仅能封闭调谐螺杆和盖板之间的间隙，保证电磁信号的顺利传输，而且不需要一样保证调谐螺杆的光杆段长度，使得腔体滤波器的加工变得更为简单。
以上所述仅为本实用新型的实施例，并非因此限制本实用新型的专利范围，凡是利用本实用新型说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本实用新型的专利保护范围内。

Claims (18)

  1. 一种腔体滤波器，包括腔体和盖板，所述盖板封盖腔体形成多个级联的谐振腔，所述多个级联的谐振腔由设置在腔体或者盖板上的隔离筋间隔开来，所述腔体底部固定有谐振柱，所述盖板上设有朝所述谐振柱伸出的调谐螺杆，其特征在于；
    所述盖板上设有通孔，所述通孔包括远离腔体的一端的螺纹孔和靠近腔体一端的光孔，所述调谐螺杆与所述螺纹孔之间螺纹连接，所述调谐螺杆与所述光孔之间设有环状的弹性导电件，所述弹性导电件的内周面与所述调谐螺杆的之间过盈配合，所述弹性导电件的外周面与所述光孔之间过盈配合。
  2. 根据权利要求1所述的腔体滤波器，其特征在于，所述调谐螺杆与所述光孔相对的外周面设有一圈凹槽，所述弹性导电件嵌入所述凹槽内。
  3. 根据权利要求1所述的腔体滤波器，其特征在于，所述通孔呈阶梯状，所述光孔的直径大于所述螺纹孔的直径，所述调谐螺杆上设有一圈凸台，所述凸台将所述弹性导电件抵接在连接所述光孔和所述螺纹孔的阶梯面上。
  4. 根据权利要求1至3任意一项所述的腔体滤波器，其特征在于，所述弹性导电件为导电硅胶垫圈。
  5. 根据权利要求1至3任意一项所述的腔体滤波器，其特征在于，所述盖板远离腔体的一侧设有套设在所述调谐螺杆上的螺母，所述螺母的螺旋方向和所述盖板的螺纹孔螺旋方向相反。
  6. 根据权利要求5所述的腔体滤波器，其特征在于，所述螺母和盖板之间设有垫片。
  7. 根据权利要求1至3任意一项所述的腔体滤波器，其特征在于，所述盖板远离腔体的一侧设置有垂直于所述盖板伸出的安装凸台，所述通孔设置在所述安装凸台中。
  8. 一种腔体滤波器，包括腔体和盖板，所述盖板封盖腔体形成多个级联的谐振腔，所述多个级联的谐振腔由设置在腔体或者盖板上的隔离筋间隔开来，所述盖板上固定有谐振柱，所述腔体底部的内侧面设有朝所述谐振柱伸出的调谐螺杆，其特征在于；
    所述腔体底部上设有通孔，所述通孔包括远离盖板一端的螺纹孔和靠近盖板一端的光孔，所述调谐螺杆与所述螺纹孔之间螺纹连接，所述调谐螺杆与所述光孔之间设有环状的弹性导电件，所述弹性导电件的内周面与所述调谐螺杆之间过盈配合，所述弹性导电件的外周面与所述光孔之间过盈配合。
  9. 根据权利要求8所述的腔体滤波器，其特征在于，所述调谐螺杆与所述光孔相对的外周面设有一圈凹槽，所述弹性导电件嵌入所述凹槽内。
  10. 根据权利要求8所述的腔体滤波器，其特征在于，所述通孔呈阶梯状，所述光孔的直径大于所述螺纹孔的直径，所述调谐螺杆上设有一圈凸台，所述凸台将所述弹性导电件抵接在连接所述光孔和所述螺纹孔的阶梯面上。
  11. 根据权利要求8至10任意一项所述的腔体滤波器，其特征在于，所述弹性导电件为导电硅胶垫圈。
  12. 根据权利要求8至10任意一项所述的腔体滤波器，其特征在于，所述腔体底部远离盖板一侧的外侧面设有套设在所述调谐螺杆上的螺母，所述螺母的螺旋方向和所述腔体底部的螺纹孔螺旋方向相反。
  13. 根据权利要求12所述的腔体滤波器，其特征在于，所述螺母和所述腔体底部之间设有垫片。
  14. 根据权利要求8至10任意一项所述的腔体滤波器，其特征在于，所述腔体底部的外侧面设置有垂直于所述腔体底部伸出的安装凸台，所述通孔设置在所述安装凸台中。
  15. 一种双工器，包括接收滤波器和发射滤波器，所述接收滤波器连接在接收端子和天线端子之间，所述发射滤波器连接在发送端子与所述天线端子之间，其特征在于，所述接收滤波器和发射滤波器为权利要求1至14任意一项所述的腔体滤波器。
  16. 一种射频拉远设备，其特征在于：包括射频收发信机模块、功放模块以及权利要求15所述的双工器，所述射频收发信机模块与所述功放模块连接，所述功放模块与所述双工器连接。
  17. 一种信号收发装置，其特征在于：
    包括权利要求15所述的双工器，与接收天线相连接，并对接收信号进行选择；
    射频低噪声放大器，与所述双工器的信号输出端连接；
    环行器，与所述低噪声放大器的信号输出端连接；
    合路器，与所述环行器连接；
    射频功率放大器，输入端与所述合路器的信号输出端相连接，输出端与所述双工器连接；
    发射天线，接收所述双工器的输出信号并将信号发射。
  18. 一种塔顶放大器，其特征在于：包括低噪声放大器和带通滤波器，所述带通滤波器为权利要求15所述的双工器。
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