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WO2014114265A1 - Filtre à cavité - Google Patents

Filtre à cavité Download PDF

Info

Publication number
WO2014114265A1
WO2014114265A1 PCT/CN2014/071469 CN2014071469W WO2014114265A1 WO 2014114265 A1 WO2014114265 A1 WO 2014114265A1 CN 2014071469 W CN2014071469 W CN 2014071469W WO 2014114265 A1 WO2014114265 A1 WO 2014114265A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
resonant rod
filter
boss
hole
Prior art date
Application number
PCT/CN2014/071469
Other languages
English (en)
Chinese (zh)
Inventor
朱银虎
袁进华
朱其玉
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2014114265A1 publication Critical patent/WO2014114265A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/06—Cavity resonators

Definitions

  • the present invention relates to communication technologies, and more particularly to a cavity filter. Background technique
  • a filter is a device that processes electromagnetic waves. Its main function is to let the useful signal pass through as much as possible without attenuation, and to reflect the unwanted signal as much as possible.
  • a cavity filter is commonly used in a base station system to perform frequency selection on a transmitted signal or a received signal.
  • the cavity filter typically includes a cavity, a resonant rod, a tuning screw, and a cover plate.
  • the cavity is provided with a plurality of cavities, the resonant rod is combined with the cavity, and is received in the cavity, the cover plate is installed at the opening of the cavity, and the cover plate is provided with a plurality of screw holes, the position and resonance of the screw holes The rod corresponds.
  • the tuning screw mates with the screw and one end of the tuning rod extends into the resonant rod after passing through the cover.
  • the frequency of the filter is adjusted at a specific power by adjusting the length of the tuning screw into the resonant rod.
  • the cavity depth of the cavity of the filter is usually made small, but as the cavity depth of the filter is made smaller, the power capacity and frequency of the filter are also adjusted. It will become smaller. Therefore, in the case where the filter cavity is deep, how to improve the power capacity and frequency adjustment range of the filter becomes the primary technical problem in the field of cavity filter.
  • the invention provides a cavity filter, in the case that the filter cavity is deep and small, The purpose of increasing the power capacity of the filter and the adjustment range of the frequency.
  • a cavity filter including a cavity having an open upper end, a cover plate, a tuning screw, and a resonant rod, the resonant rod being fixed on a bottom plate of the cavity and housed in the cavity
  • the cover plate is fixedly mounted at the opening of the cavity, and the cover plate is provided with a screw hole, the tuning screw is engaged with the screw hole and one end passes through the cover plate and extends into the cavity
  • the through hole is disposed in the middle of the resonant rod, the tuning screw extends into the through hole, and an outer wall of the resonant rod is fixedly connected to a bottom plate of the cavity.
  • the bottom plate of the cavity is provided with a boss having a circular cross section along a depth direction of the cavity, and an outer wall of the resonant rod is cooperatively coupled with an inner wall of the boss.
  • the inner wall of the boss is provided with an internal thread
  • the outer wall of the lower end of the resonant rod is provided with an external thread that cooperates with the internal thread.
  • the shape of the upper portion of the through hole along the depth direction of the cavity is a hexagon.
  • the resonant rod is provided with at least two symmetrical mounting holes on the upper end surface in the depth direction of the cavity.
  • the outer wall of the resonant rod is connected to the inner wall of the boss by an interference fit.
  • the resonant rod has a step extending radially outward near a position connected to the boss, the step overlapping the top plane of the boss.
  • the resonant rod is provided with a flange on a radially outward direction.
  • the tuning screw protrudes into the through hole and the outer wall of the resonance rod is fixedly connected with the bottom plate of the cavity, so that the tuning screw can extend into the vicinity in the cavity depth direction.
  • FIG. 1 is a cross-sectional view showing the structure of a cavity filter according to an embodiment of the present invention
  • FIG. 2 is a partial schematic view of FIG.
  • Figure 3 is a cross-sectional view of the resonant rod of Figure 1;
  • FIG. 4 is a schematic perspective view of a cavity filter according to an embodiment of the present invention
  • FIG. 5 is another schematic perspective view of a cavity filter according to an embodiment of the present invention
  • Figure 7 is a cross-sectional view of the resonator rod of Figure 6;
  • Figure 8 is a partial schematic view of Figure 6. detailed description
  • a specific embodiment of the cavity filter provided by the present invention is a single-cavity filter including a cavity 11 with an open upper end, a cover 12, and a tuning screw 13
  • the oscillating rod 14 is fixed on the bottom plate 16 of the cavity 11 and received in the cavity 11.
  • the cover plate 12 can be fixedly mounted on the opening of the cavity 11 by screwing or welding, and the cover plate 12 is mounted on the cover plate 12 a screw hole is provided, and the tuning screw 13 is engaged with the screw hole and one end passes through the cover plate 12 and protrudes into the cavity 11.
  • the resonant rod 14 is provided with a through hole 15 therebetween, and the tuning screw 13 extends into the through hole 15, and The outer wall of the resonant rod 14 is fixedly connected to the bottom plate 16 of the cavity 11.
  • the tuning screw 13 extends into the through hole 15 and the outer wall of the resonant rod 14 is fixedly connected with the bottom plate 16 of the cavity 11, so The tuning screw 13 can extend into the position close to the bottom plate 16 of the cavity 11 in the cavity depth direction, so that the through hole 15 in the resonant rod 14 can be fully utilized to achieve an increase in the adjustment margin of the tuning screw 13, thereby improving the filter.
  • the purpose of the frequency adjustment range. Therefore, the cavity filter of the present invention can still improve tuning by making the cavity depth small.
  • the adjustment margin of the screw achieves the purpose of increasing the adjustment range of the filter power capacity and frequency. As shown in FIG. 1 , FIG.
  • the bottom plate 16 of the cavity 11 is provided with a boss 17 having a circular cross section along the depth direction of the cavity, and the resonant rod 14 is The outer wall is mated with the inner wall of the boss 17.
  • This connection method is relatively simple and easy to implement, and at the same time, the thickness of the cavity bottom plate can be reduced to a certain extent, and the weight of the cavity filter can be reduced.
  • the boss 17 may be integrally molded with the cavity 11, and the bottom plate 16 of the cavity 11 and the boss 17 may be fixed together by post-welding or other connection.
  • the resonant rod 14 and the boss 17 can be coupled by a screw connection (see Fig. 1) or an interference fit connection (see Fig. 6).
  • the threaded connection is used, as shown in Figs. 2 and 3, the internal thread 22 can be machined on the inner wall of the boss 17, and the external thread 31 fitted to the internal thread 22 can be machined on the outer wall of the lower end of the resonance rod 14.
  • the portion of the resonant rod 14 having the external thread 31 needs to be screwed into the inner bore 21 of the boss 17 to be mated with the internal thread 22 of the boss 17.
  • the shape of the upper portion of the through hole 15 in the resonant rod 14 to be hexagonal, so that we can use the mounting tool 41 having a hexagonal cross section.
  • the resonant rod 14 is mounted, and one end of the mounting tool 41 is inserted into the hexagonal hole of the resonant rod 14 during specific mounting, and then the other end of the rotating mounting tool 41 is screwed into the inner hole of the boss 17 having the internal thread 22 21 in.
  • at least two symmetrical mounting holes 512 are provided on the upper end surface of the resonant rod 14, so that the resonant rod 14 can be mounted by means of the mounting tool 51, and the two pin bodies at the lower end of the tool 51 are mounted during installation.
  • the 511 is inserted into the mounting hole 512, and the upper portion of the mounting tool 51 is manually rotated to realize the mounting of the resonant rod 14.
  • the outer diameter of the lower end portion of the resonance rod 14 can be designed to be slightly larger than the outer diameter of the boss 17, and by crimping or riveting during installation.
  • the lower end of the resonant rod 14 is pressed into the inner hole 21 of the boss 17, and the interference fit connection between the resonant rod 14 and the boss 17 is achieved.
  • the resonant rod 14 can be extended radially outward near the position connected to the boss 17.
  • a step 32 is provided which overlaps the top plane of the boss 17.
  • the desired frequency band is provided with a flange 18 radially outward of the resonant rod 14.
  • the flange 18 is preferably integrally formed with the resonant rod 14.
  • the nut 19 is fitted to the tuning screw 13, so that when the tuning screw 13 is adjusted, the nut 19 is first loosened, and when the position is adjusted to the required position, the nut 19 is tightened and the adjusting screw 13 is adjusted.
  • the cover plates 12 are fixedly coupled together.

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  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne un filtre à cavité, en rapport avec les technologies de communication, qui permet d'améliorer une capacité de puissance et une plage de régulation de fréquence du filtre dans le cas où la profondeur de la cavité du filtre est réalisée de petite taille. Le filtre à cavité comprend une cavité munie d'une ouverture d'extrémité supérieure, une plaque de recouvrement, un tige à vis de réglage et une tige de résonance. La tige de résonance est fixée sur une plaque de fond de la cavité et elle est logée dans la cavité. La plaque de recouvrement est montée en position fixe au niveau de l'ouverture de la cavité et un trou de vis est réalisé sur la plaque de recouvrement. La tige à vis de réglage correspond au trou de vis et une extrémité de celle-ci pénètre à travers la plaque de recouvrement et s'étend dans la cavité. Le centre de la tige de résonance est muni d'un trou traversant, la tige à vis de réglage s'étend dans le trou traversant et la paroi extérieure de la tige de résonance est reliée à demeure à la plaque de fond de la cavité. La présente invention améliore une capacité de puissance et une plage de régulation de fréquence du filtre dans le cas où la profondeur de la cavité du filtre est réalisée de petite taille.
PCT/CN2014/071469 2013-01-25 2014-01-26 Filtre à cavité WO2014114265A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310028271.3A CN103094649B (zh) 2013-01-25 2013-01-25 腔体滤波器
CN201310028271.3 2013-01-25

Publications (1)

Publication Number Publication Date
WO2014114265A1 true WO2014114265A1 (fr) 2014-07-31

Family

ID=48206962

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/071469 WO2014114265A1 (fr) 2013-01-25 2014-01-26 Filtre à cavité

Country Status (2)

Country Link
CN (1) CN103094649B (fr)
WO (1) WO2014114265A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103094649B (zh) * 2013-01-25 2016-12-28 华为技术有限公司 腔体滤波器
CN103650237B (zh) * 2013-08-09 2015-12-30 华为技术有限公司 一种滤波器调谐装置及滤波器
CN203746999U (zh) * 2013-11-25 2014-07-30 华为技术有限公司 滤波器
CN113131115A (zh) * 2019-12-31 2021-07-16 深圳市大富科技股份有限公司 腔体滤波器及其盖板组件以及通信设备
CN112952324A (zh) * 2021-04-02 2021-06-11 京信射频技术(广州)有限公司 滤波器、谐振器与通信装置
CN113285189A (zh) * 2021-04-20 2021-08-20 武汉德威斯电子技术有限公司 全密封滤波器及航空航天用通信设备
CN113236650A (zh) * 2021-04-20 2021-08-10 武汉凡谷电子技术股份有限公司 锁紧式滤波器调谐螺杆装置及滤波器
IT202100012983A1 (it) * 2021-05-19 2022-11-19 Commscope Italy Srl Elemento di fissaggio per il risonatore di un filtro a radiofrequenza
CN113851800B (zh) * 2021-08-13 2022-12-13 武汉凡谷电子技术股份有限公司 一种滤波器及其制造方法
CN116112514B (zh) * 2021-11-11 2024-08-02 广州汽车集团股份有限公司 一种车辆远程诊断系统及方法
CN116885414A (zh) * 2023-08-11 2023-10-13 京信射频技术(广州)有限公司 滤波器及通信设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101546853A (zh) * 2009-04-29 2009-09-30 上海华为技术有限公司 一种压铸双工器及压铸方法
CN101841075A (zh) * 2009-10-13 2010-09-22 安徽省大富机电技术有限公司 一种谐振管
CN202167594U (zh) * 2011-07-01 2012-03-14 深圳市大富科技股份有限公司 一种介质滤波器
CN103094649A (zh) * 2013-01-25 2013-05-08 华为技术有限公司 腔体滤波器
CN203119067U (zh) * 2013-01-25 2013-08-07 华为技术有限公司 腔体滤波器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102255124A (zh) * 2011-04-22 2011-11-23 深圳市大富科技股份有限公司 腔体滤波器、通信设备、通信设备盖板组件及调谐结构
CN102354780A (zh) * 2011-07-22 2012-02-15 深圳市大富科技股份有限公司 腔体滤波器及通信设备
CN202564517U (zh) * 2012-04-28 2012-11-28 成都泰格微波技术股份有限公司 新型低频腔体滤波器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101546853A (zh) * 2009-04-29 2009-09-30 上海华为技术有限公司 一种压铸双工器及压铸方法
CN101841075A (zh) * 2009-10-13 2010-09-22 安徽省大富机电技术有限公司 一种谐振管
CN202167594U (zh) * 2011-07-01 2012-03-14 深圳市大富科技股份有限公司 一种介质滤波器
CN103094649A (zh) * 2013-01-25 2013-05-08 华为技术有限公司 腔体滤波器
CN203119067U (zh) * 2013-01-25 2013-08-07 华为技术有限公司 腔体滤波器

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Publication number Publication date
CN103094649A (zh) 2013-05-08
CN103094649B (zh) 2016-12-28

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