WO2016165384A1 - 一种谐振器和腔体滤波器 - Google Patents

一种谐振器和腔体滤波器 Download PDF

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Publication number
WO2016165384A1
WO2016165384A1 PCT/CN2015/098229 CN2015098229W WO2016165384A1 WO 2016165384 A1 WO2016165384 A1 WO 2016165384A1 CN 2015098229 W CN2015098229 W CN 2015098229W WO 2016165384 A1 WO2016165384 A1 WO 2016165384A1
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cavity
upper cover
resonant rod
resonator
fixed
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PCT/CN2015/098229
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English (en)
French (fr)
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赵丽娟
周虹
田珅
杨蓉
袁佳琳
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中兴通讯股份有限公司
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Publication of WO2016165384A1 publication Critical patent/WO2016165384A1/zh

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    • 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 present invention relates to the field of communications, and in particular to a resonator and a cavity filter.
  • a filter is a device that processes electromagnetic waves. Its main function is to make 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.
  • a cavity filter is provided in the Chinese Patent No. CN201310028271.3. As shown in FIG. 1, the filter has a cap structure resonator, a cavity, a cover plate and a tuning screw, and the resonator is fixedly mounted in the cavity. At the opening, there is no screw hole on the cover plate, the tuning screw cooperates with the screw hole and one end passes through the cover plate and penetrates into the cavity body.
  • the conventional cavity filter technology has the following disadvantages: the structure is complicated, and includes multiple components, and it is necessary to have one more base on the cavity to install the resonator. The existence of these devices will bring the disadvantages of high cost, difficulty in process control, and low production efficiency.
  • the main technical problem to be solved by the present invention is to provide a resonator and a cavity filter, which solves the problem that the structure of the relevant cavity filter is complicated, and the resonator needs to be installed in the cavity, resulting in high cost, high processing difficulty and low production efficiency. .
  • an embodiment of the present invention provides a resonator including a metal cavity and a resonant rod;
  • the metal cavity includes a cavity body and a cavity upper cover;
  • the cavity upper cover is fixed at an upper end of the cavity body;
  • the upper cover of the cavity is provided with an opening, and the resonant rod is matched with the opening and one end passes through the upper cover of the cavity and extends into the cavity body, and is kept at a certain distance from the bottom plate of the cavity body.
  • the resonant rod forms an LC oscillating circuit with the sidewall of the cavity body; the resonant rod is fixed on the upper cover of the cavity.
  • the cavity body of the metal cavity and the upper cover of the cavity are integrally formed, or the upper cover of the cavity is fixed to the upper end of the upper cover of the cavity by screws or welding.
  • the cavity body is a cylindrical cavity, a rectangular cavity or an irregular polygonal cavity.
  • the resonant rod is a cylindrical body, a rectangular body or an irregular polygonal body.
  • the outer wall of the upper end of the resonant rod is provided with an external thread, and the resonance is performed by a nut.
  • the rod is fixed to the upper cover of the above cavity.
  • the inner wall of the opening is provided with an internal thread that cooperates with the external thread, and the resonant rod is fixed to the upper cover of the cavity by the internal thread and the external thread.
  • the bottom of the resonant rod is provided with a frequency increasing component
  • the frequency increasing component includes an upper end surface and a lower end surface
  • the upper end surface is connected to a bottom of the resonant rod
  • a surface area of the lower end surface is larger than The surface area of the bottom of the above resonant rod.
  • the resonant rod and the frequency increasing component are integrally formed.
  • the material of the frequency increasing component comprises a metal material or a medium material.
  • an embodiment of the present invention further provides a cavity filter, the cavity filter comprising a resonator as described above, or a plurality of resonators coupled as described above.
  • the resonator and the cavity filter provided by the embodiment of the invention include a metal cavity and a resonant rod;
  • the metal cavity includes a cavity body and a cavity upper cover;
  • the cavity upper cover is fixed on the upper end of the cavity;
  • the cavity The cover is provided with an opening, the resonant rod is matched with the opening, and one end passes through the upper cover of the cavity and extends into the cavity body body, and is kept at a certain distance from the bottom plate of the cavity body; the resonant rod is fixed on the upper cover of the cavity body.
  • the resonator only needs to set a resonant rod, the frequency tuning is realized by the resonant rod, the structure is simple, no unnecessary components are needed, no unnecessary processing is needed for the cavity, the process is simple, and the production efficiency is improved. Moreover, the cost can be reduced, and the miniaturization and weight reduction of the cavity filter can be realized.
  • FIG. 1 is a schematic structural view of a cavity filter in the related art
  • FIG. 2 is a schematic structural view of a resonator according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic structural diagram of a cavity filter according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of a cavity filter according to Embodiment 3 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the resonator includes a metal cavity 20 and a resonant rod 23;
  • the cavity body 20 includes a cavity body 21 and a cavity upper cover 22; the cavity upper cover 22 is fixed at the upper end of the cavity; the cavity upper cover 22 is provided with an opening, the resonant rod 23 is matched with the opening and one end passes through the cavity
  • the size of a certain distance here may be determined according to the size of the specific cavity body 21 and the required frequency range.
  • the size of the cavity body 21 is smaller than the cavity size of the associated filter.
  • the cavity body 21 of the metal cavity 20 and the cavity upper cover 22 are integrally formed, or the cavity upper cover 22 is fixed to the upper end of the cavity body 21 by screws or welding.
  • the cavity upper cover 22 can be secured to the cavity body 21 are included.
  • the cavity body 21 is a cylindrical cavity, a rectangular cavity or an irregular polygonal cavity. It should be understood that the shape of the specific cavity does not constitute a specific limitation as long as it has a cavity for housing the resonant rod 23.
  • the resonant rod 23 is a cylindrical body, a rectangular body or an irregular polygonal body. It should be understood that the resonant rod 23 can realize the frequency modulation filtering with the side wall and the bottom of the cavity body 21, and the shape of the specific resonant rod 23 does not constitute a specific limitation.
  • the outer wall of the upper end of the resonant rod 23 is provided with an external thread, and the resonant rod 23 is fixed to the cavity upper cover 22 by a nut.
  • the specific manner and structure are not limited.
  • the inner wall of the opening is provided with an internal thread that cooperates with the external thread, and the resonant rod 23 is fixed to the cavity upper cover 22 by the internal thread and the external thread. That is, it can be fixedly fixed by the nut and the resonant rod 23 itself.
  • the bottom of the resonant rod 23 is provided with a frequency increasing component.
  • the frequency increasing component includes an upper end surface and a lower end surface, and the upper end surface is connected to the bottom of the resonant rod 23, and the surface area of the lower end surface is larger than The surface area of the bottom of the resonant rod 23.
  • the resonant rod 23 and the frequency increasing component may be connected and fixed by welding or the like.
  • the resonant rod 23 and the frequency increasing component are integrally formed.
  • the material of the frequency-increasing component includes a metal material or a medium material.
  • the resonator in this example may constitute a cavity filter, and a specific filter may include one or more resonators, that is, the cavity filter includes a resonator as described above, or It is composed of a plurality of resonator couplings as described above.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the schematic diagram of the structure of the cavity filter of this embodiment is described by taking a resonator as a cavity filter as an example.
  • the cavity filter is composed of a single cavity, that is, a resonator, including an upper end.
  • the upper cover 21 and the resonant rod 23 are fixedly mounted on the opening of the cavity body 21 by screws or welding, and the upper cover 21 of the cavity is provided with a screw hole, the tuning rod 23 and the screw hole Fitted and one end passes through the cavity upper cover 21 and protrudes into the cavity body 21, the resonant rod 23 is a threaded cylindrical screw, the resonant rod 23 is fixed by the nut 24, or the tuning nut 23 can be in the form of a self-locking screw It is fixed on the upper cover of the cavity.
  • This example provides a seed cavity filter, which can be simplified, miniaturized, and lightened by eliminating a conventional resonator.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the cavity filter is a single cavity, and includes a cavity body with an open upper end. 21, the upper cover 21 of the cavity, the resonant rod 23, the upper cover 21 of the cavity can be fixedly mounted on the opening of the cavity body 21 by screwing or welding, and the upper cover 21 of the cavity is provided with a screw hole, the tuning rod 23 is engaged with the screw hole and one end passes through the cavity upper cover 21 and protrudes into the cavity body 21, and the resonance lever 23 is a special tuning lever for adding the loading portion 31 at the end of the threaded cylindrical screw.
  • the resonant rod 23 is fixed by a nut 24, or the tuning nut 23 may be fixed to the upper cover of the cavity in the form of a self-locking screw.
  • the loading portion 31 is cylindrical, but is not limited to this shape; the loading portion 31 herein is a specific example of the frequency increasing component.
  • the loading portion 31 is a conductive material or a dielectric material.
  • a specific embodiment is exemplified below, for example, a passband of 2575 MHz to 2635 MHz, a loss of 1.0 dB, and a volume of 6 L.
  • the implemented scheme can adopt the cavity structure of the embodiment, and the conventional cavity filter with a resonator cannot. achieve.
  • This example provides a seed cavity filter.
  • a disk-shaped component is added to the resonant rod.
  • the loading portion 31 in this example is also a specific example of the frequency-increasing component, and the frequency range of the tuning is increased, thereby realizing The purpose of simplicity, miniaturization, and weight reduction.
  • the disc type material added to the strip screw is not limited to a metal material but also a medium material. The frequency tuning is achieved by the resonant rod in the cavity body, thereby achieving miniaturization and weight reduction of the cavity filter.
  • the resonator and the cavity filter provided by the embodiment of the invention include a metal cavity and a resonant rod;
  • the metal cavity includes a cavity body and a cavity upper cover;
  • the cavity upper cover is fixed on the upper end of the cavity;
  • the cavity The cover is provided with an opening, the resonant rod is matched with the opening, and one end passes through the upper cover of the cavity and extends into the cavity body body, and is kept at a certain distance from the bottom plate of the cavity body; the resonant rod is fixed on the upper cover of the cavity body.
  • the resonator only needs to set a resonant rod, the frequency tuning is realized by the resonant rod, the structure is simple, no unnecessary components are needed, no unnecessary processing is needed for the cavity, the process is simple, and the production efficiency is improved. Moreover, the cost can be reduced, and the miniaturization and weight reduction of the cavity filter can be realized.

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Abstract

本发明提供的谐振器和腔体滤波器，应用于通信领域。谐振器包括金属腔体和谐振杆；金属腔体包括腔体本体和腔体上盖；腔体上盖固定在腔体上端；腔体上盖上设有开孔，谐振杆与开孔配合且一端穿过腔体盖板并伸入腔体本体内，且与腔体本体的底板保持一定距离；谐振杆固定在盖板上。与相关技术相比，谐振器只需要设置一个谐振杆，通过该谐振杆实现频率调谐，结构简单，不需要多余的元件，也不需要对腔体进行多余的加工，工艺加工简单，提高生产效率，并且能够降低成本，进而可以实现腔体滤波器的小型化和轻量化。

Description

一种谐振器和腔体滤波器 技术领域
本发明涉及通信领域，具体涉及一种谐振器和腔体滤波器。
背景技术
滤波器是一种对电磁波信号有处理作用的器件，其主要作用是：让有用信号尽可能无衰减的通过，对无用信号尽可能大的反射。目前，基站系统中普遍采用腔体滤波器对发射信号或接收信号进行频率选择。在中国第CN201310028271.3专利中提供了一种腔体滤波器，如图1所示，该滤波器有帽式结构的谐振器，腔体、盖板和调谐螺杆，谐振器固定安装在腔体的开口处，盖板上没有螺孔，调谐螺杆与螺孔配合且一端传过盖板深入腔体内，其中，谐振器中间没有通孔，调谐螺杆的外壁与腔体的底板固定连接。随着微波无线通信的快速发展，无线通讯的普及，运营商对腔体滤波器的小型化、轻量化需求越来越强烈。
可见，传统腔体滤波器技术中存在以下的不足：结构复杂，包含多个元件，需要在腔体上要多一个底座以便安装谐振器。这些器件的存在会同时带来成本高，工艺控制难度加大，生产效率低的缺点。
发明内容
本发明要解决的主要技术问题是，提供一种谐振器和腔体滤波器，解决相关腔体滤波器结构复杂，需要在腔体安装谐振器导致成本高，加工难度大以及生产效率低的问题。
为解决上述问题，本发明实施例提供一种谐振器，包括金属腔体和谐振杆；上述金属腔体包括腔体本体和腔体上盖；上述腔体上盖固定在上述腔体本体上端；上述腔体上盖上设有开孔，上述谐振杆与上述开孔配合且一端穿过上述腔体上盖并伸入上述腔体本体内，且与上述腔体本体的底板保持一定距离使上述谐振杆与上述腔体本体的侧壁形成LC震荡电路；上述谐振杆固定在上述腔体上盖上。
在本发明的一种实施例中，上述金属腔体的腔体本体和腔体上盖一体成型，或上述腔体上盖通过螺钉或焊接方式固定在上述腔体上盖上端。
在本发明的一种实施例中，上述腔体本体为圆柱形腔体、矩形腔体或者不规则多边形腔体。
在本发明的一种实施例中，上述谐振杆为圆柱形体、矩形体或者不规则多边形体。
在本发明的一种实施例中，上述谐振杆的上端外壁上设有外螺纹，通过螺母将上述谐振 杆固定在上述腔体上盖上。
在本发明的一种实施例中，上述开孔内壁上设有与上述外螺纹配合的内螺纹，通过上述内螺纹和上述外螺纹将上述谐振杆固定在上述腔体上盖上。
在本发明的一种实施例中，上述谐振杆的底部设有增频部件,上述增频部件包括上端面和下端面,上述上端面与上述谐振杆的底部连接,上述下端面的表面面积大于上述谐振杆底部的表面积。
在本发明的一种实施例中，上述谐振杆和上述增频部件一体成型。
在本发明的一种实施例中，上述增频部件的材质包括金属材质或介质材质。
为解决上述问题，本发明实施例还提供一种腔体滤波器，上述腔体滤波器包含一个如上述上述的谐振器，或者由若干个如上述上述的谐振器耦合构成。
本发明实施例的有益效果是：
本发明实施例提供的谐振器和腔体滤波器，谐振器包括金属腔体和谐振杆；金属腔体包括腔体本体和腔体上盖；腔体上盖固定在腔体上端；腔体上盖上设有开孔，谐振杆与开孔配合且一端穿过腔体上盖并伸入腔体本体内，且与腔体本体的底板保持一定距离；谐振杆固定在腔体上盖上。与相关技术相比，谐振器只需要设置一个谐振杆，通过该谐振杆实现频率调谐，结构简单，不需要多余的元件，也不需要对腔体进行多余的加工，工艺加工简单，提高生产效率，并且能够降低成本，进而可以实现腔体滤波器的小型化和轻量化。
附图说明
图1为相关技术中的空腔滤波器结构示意图；
图2为本发明实施例一提供的谐振器结构示意图；
图3为本发明实施例二提供的腔体滤波器结构示意图；
图4为本发明实施例三提供的腔体滤波器结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例一：
本实施例的谐振器结构示意图，如图2所示，该谐振器包括金属腔体20和谐振杆23；金 属腔体20包括腔体本体21和腔体上盖22；腔体上盖22固定在腔体上端；腔体上盖22上设有开孔，谐振杆23与开孔配合且一端穿过腔体上盖并伸入腔体本体21内，且与腔体本体21的底板保持一定距离使所述谐振杆与所述腔体本体的侧壁形成LC震荡电路；谐振杆23固定在腔体上盖上。值得注意的是，这里的一定距离的大小具体可以根据具体腔体本体21尺寸大小以及所需的频率范围而定。优选的，腔体本体21的尺寸大小比相关的滤波器的腔体大小要小。
可选地，金属腔体20的腔体本体21和腔体上盖22一体成型，或腔体上盖22通过螺钉或焊接方式固定在腔体本体21上端。当然，其他可以将腔体上盖22固定在腔体本体21的方式都包含在内。
可选地，腔体本体21为圆柱形腔体、矩形腔体或者不规则多边形腔体。应该理解为，只要具有一个腔体对谐振杆23进行收容即可，具体腔体的形状不构成具体限制。
可选地，谐振杆23为圆柱形体、矩形体或者不规则多边形体。应该理解为，谐振杆23只要能够实现与腔体本体21的侧壁和底部实现调频滤波即可，具体谐振杆23的形状不构成具体限制。
可选地，谐振杆23的上端外壁上设有外螺纹，通过螺母将谐振杆23固定在腔体上盖22上。应该理解为，只要将谐振杆23固定在腔体上盖22上即可，具体的方式以及结构不构成限制。进一步，为了提高固定效果，开孔内壁上设有与外螺纹配合的内螺纹，通过内螺纹和外螺纹将谐振杆23固定在腔体上盖22上。即可以通过螺母和谐振杆23自身固定结合固定。
可选地，为了提高谐振器的调谐频率范围，谐振杆23的底部设有增频部件,增频部件包括上端面和下端面,上端面与谐振杆23的底部连接,下端面的表面面积大于谐振杆23底部的表面积。具体的，谐振杆23和增频部件可以采用焊接等方式进行连接固定，优选的，谐振杆23和增频部件一体成型。
可选地，增频部件的材质包括金属材质或介质材质。
值得注意的是，本实例中的谐振器可以构成腔体滤波器，具体的一个滤波器可以包含一个或多个谐振器，即所述腔体滤波器包含一个如上述所述的谐振器，或者由若干个如上述所述的谐振器耦合构成。
实施例二：
本实施例的腔体滤波器结构示意图，该实施例以一个谐振器构成腔体滤波器为例进行说明，如图2所示，该腔体滤波器为单腔即一个谐振器构成，包括上端开口的腔体本体21、腔 体上盖21、谐振杆23，腔体上盖21可以通过螺钉或焊接的方式固定安装在腔体本体21的开口处，且腔体上盖21上设有螺孔，调谐杆23与螺孔配合且一端穿过腔体上盖21并伸入腔体本体21内，谐振杆23是带有螺纹的圆柱形螺杆，谐振杆23通过螺母24固定，或者调谐螺母23可以是自锁螺钉的形式固定在腔体上盖上。
本实例提供种腔体滤波器，通过取消传统的谐振器，从而实现简易化、小型化、轻量化的目的。
实施例三：
本实施例的腔体滤波器结构示意图，该实施例以一个谐振器构成腔体滤波器为例进行说明，如图3所示，该腔体滤波器为单腔，包括上端开口的腔体本体21、腔体上盖21、谐振杆23，腔体上盖21可以通过螺丝连接或焊接的方式固定安装在腔体本体21的开口处，且腔体上盖21上设有螺孔，调谐杆23与螺孔配合且一端穿过腔体上盖21并伸入腔体本体21内，谐振杆23是在带有螺纹的圆柱形螺杆的终端添加加载部分31的特殊调谐杆。谐振杆23通过螺母24固定，或者调谐螺母23可以是自锁螺钉的形式固定在腔体上盖上。所述加载部分31是圆柱形，但不限于该形状；这里的加载部分31为增频部件的一种具体实例。所述加载部分31是导电材料，也可是介质材料。
下面举例一个具体实施例，如通带为2575MHz～2635MHz，损耗为1.0dB，体积为6L的结构，实现的方案可采用本实施例的空腔结构，传统的有谐振器的腔体滤波器无法实现。
本实例提供种腔体滤波器，通过取消传统的谐振器，谐振杆上增加盘型部件，本实例中的加载部分31也即增频部件的一种具体实例，增加调谐的频率范围，从而实现简易化、小型化、轻量化的目的。条形螺杆上增加的盘型材料不限于金属材质，也能是介质材质。通过空腔本体中的谐振杆实现频率调谐，从而实现腔体滤波器的小型化和轻量化。
以上所述，仅为本发明人的具体实施方式，对于本领域相关技术人员来说，可以根据本发明实施例的技术方案及其构思对谐振器、滤波器以组合或更换，设计出其它组合结构的双工、滤波器一体化模块，而所有这些改变或替换都应属于本发明所附的权利要求保护范围。
以上实施例仅用以说明本发明的技术方案而非限制，仅仅参照较佳实施例对本发明进行了详细说明。本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的精神和范围，均应涵盖在本发明的权利要求范围当中。
工业实用性
本发明实施例提供的谐振器和腔体滤波器，谐振器包括金属腔体和谐振杆；金属腔体包括腔体本体和腔体上盖；腔体上盖固定在腔体上端；腔体上盖上设有开孔，谐振杆与开孔配合且一端穿过腔体上盖并伸入腔体本体内，且与腔体本体的底板保持一定距离；谐振杆固定在腔体上盖上。与相关技术相比，谐振器只需要设置一个谐振杆，通过该谐振杆实现频率调谐，结构简单，不需要多余的元件，也不需要对腔体进行多余的加工，工艺加工简单，提高生产效率，并且能够降低成本，进而可以实现腔体滤波器的小型化和轻量化。

Claims (10)

  1. 一种谐振器，包括金属腔体和谐振杆；所述金属腔体包括腔体本体和腔体上盖；所述腔体上盖固定在所述腔体本体上端；所述腔体上盖上设有开孔，所述谐振杆与所述开孔配合且一端穿过所述腔体上盖伸入所述所述腔体本体内，且与所述腔体本体的底板保持一定距离使所述谐振杆与所述腔体本体的侧壁形成LC震荡电路；所述谐振杆固定在所述腔体上盖上。
  2. 如权利要求1所述的谐振器，其中，所述金属腔体的腔体本体和腔体上盖一体成型，或所述腔体上盖通过螺钉或焊接方式固定在所述腔体本体上端。
  3. 如权利要求1所述的谐振器，其中，所述腔体本体为圆柱形腔体、矩形腔体或者不规则多边形腔体。
  4. 如权利要求1所述的谐振器，其中，所述谐振杆为圆柱形体、矩形体或者不规则多边形体。
  5. 如权利要求1所述的谐振器，其中，所述谐振杆的上端外壁上设有外螺纹，通过螺母将所述谐振杆固定在所述腔体上盖上。
  6. 如权利要求5所述的谐振器，其中，所述开孔内壁上设有与所述外螺纹配合的内螺纹，通过所述内螺纹和所述外螺纹将所述谐振杆固定在所述腔体上盖上。
  7. 如权利要求1-6任一项所述的谐振器，其中，所述谐振杆的底部设有增频部件,所述增频部件包括上端面和下端面,所述上端面与所述谐振杆的底部连接,所述下端面的表面面积大于所述谐振杆底部的表面积。
  8. 如权利要求7所述的谐振器，其中，所述谐振杆和所述增频部件一体成型。
  9. 如权利要求7所述的谐振器，其中，所述增频部件的材质包括金属材质或介质材质。
  10. 一种腔体滤波器，所述腔体滤波器包含一个权利要求1-9中任一项所述的谐振器，或者由若干个权利要求1-9中任一项所述的谐振器耦合构成。
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