WO2016106646A1 - 腔体滤波器的耦合结构、腔体滤波器及双工器 - Google Patents
腔体滤波器的耦合结构、腔体滤波器及双工器 Download PDFInfo
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- WO2016106646A1 WO2016106646A1 PCT/CN2014/095819 CN2014095819W WO2016106646A1 WO 2016106646 A1 WO2016106646 A1 WO 2016106646A1 CN 2014095819 W CN2014095819 W CN 2014095819W WO 2016106646 A1 WO2016106646 A1 WO 2016106646A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
Definitions
- the present invention relates to the field of wireless communication technologies, and in particular, to a coupling structure of a cavity filter, a cavity filter, and a duplexer.
- the cross-coupling structure is composed of a cross-coupling body and a supporting medium.
- the distance between the cross-coupling body and the resonator determines the coupling amount. The smaller the distance, the larger the coupling amount.
- the change of the small distance between them will have a great influence on the coupling amount, so that the assembly error between the resonator and the cross-coupled body is to the cross-coupled body and the resonator.
- the distance between them is large, which causes the fluctuation of the coupling amount to be large, which affects the consistency of the coupling amount.
- the industry usually needs to disassemble the cover of the filter to replace the cross-coupling body or adjust the assembly position between the resonator and the cross-coupling body, resulting in low production efficiency and high maintenance cost.
- the technical problem to be solved by the embodiments of the present invention is to provide a coupling structure of a cavity filter, a cavity filter, and a duplexer, which can ensure the consistency of the coupling amount between the cross-coupled body and the resonator. And the production efficiency is high and the maintenance cost is low.
- a technical solution adopted by the present invention is to provide a coupling structure of a cavity filter, including a resonator and a cross-couple body disposed opposite to the resonator and performing signal coupling, the resonator and the cross-couple body A metal piece is provided between the metal piece and the cavity of the cavity filter, and the signal coupling between the metal piece and the cross-couple body.
- the bottom of the cavity of the cavity filter is provided with an integrally formed boss, the metal piece and the boss are integrally formed, and the resonator is fixed on the boss.
- the resonator is soldered and fixed on the boss.
- the resonator screw is locked and fixed on the boss.
- the metal piece is disposed at the bottom of the cavity of the cavity filter.
- the metal piece completely blocks the cross-coupled body.
- the distance between the metal piece and the resonator is 0.3 to 1.0 mm, and the distance between the metal piece and the cross-couple body is 1.0 to 5.0 mm.
- a cavity filter comprising a cavity, a cover plate covering the cavity, and a plurality of resonant cavities separated by a partition wall in the cavity.
- a coupling structure is disposed in the cavity, the coupling structure includes a resonator disposed in the cavity and a cross-couple body disposed between the at least two non-adjacent resonators, and the resonator is disposed opposite to the cross-couple body and performs signal coupling, and the resonance
- a metal piece is disposed between the device and the cross-coupled body, and the metal piece is integrally formed with the cavity of the cavity filter, and the signal is coupled between the metal piece and the cross-coupled body.
- the bottom of the cavity of the cavity filter is provided with an integrally formed boss, the metal piece and the boss are integrally formed, and the resonator is fixed on the boss.
- the resonator is soldered and fixed on the boss.
- the resonator screw is locked and fixed on the boss.
- the metal piece is disposed at the bottom of the cavity of the cavity filter.
- the metal piece completely blocks the cross-coupled body.
- the distance between the metal piece and the resonator is 0.3 to 1.0 mm, and the distance between the metal piece and the cross-couple body is 1.0 to 5.0 mm.
- 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. Between the transmitting terminal and the antenna terminal, the filter and the transmission filter are used to filter the cavity.
- the filter coupling structure provided by the present invention converts the coupling between the cross-coupling body and the resonator into a cross-coupling body and a metal piece.
- the coupling between the metal piece and the filter cavity makes the tolerance between the metal piece and the cross-couple body small, and the error of the coupling quantity is small, so that the coupling between the cross-couple body and the resonator can be improved. Consistency of quantity. Further, the assembly error between the resonator and the cross-couple body in the prior art is avoided, and the cover plate of the filter needs to be removed to replace the cross-couple body, which can improve production efficiency and reduce cost.
- FIG. 1 is a cross-sectional structural view showing an embodiment of a cavity filter having a coupling structure according to the present invention
- FIG. 2 is a schematic block diagram of an embodiment of a duplexer of the present invention.
- FIG. 3 is a schematic block diagram of an embodiment of the radio remote device of the present invention.
- FIG. 1 is a cross-sectional view showing an embodiment of a cavity filter having a coupling structure of the present invention.
- the cavity filter 20 includes a cavity and a cover plate 21 of the cover cavity.
- the cavity has a plurality of resonant cavities separated by the partition wall 23, and the cavity is provided with a coupling structure.
- the coupling structure of the present embodiment includes a resonator 11 disposed inside the cavity and a cross-couple body 12 disposed opposite to the resonator 11, and a metal piece 13 disposed between the resonator 11 and the cross-couple body 12, the metal piece 13 and the cross Signal coupling between the coupling bodies 12 causes signal coupling between the resonator 11 and the cross-coupled body 12.
- the metal piece 13 is preferably integrally formed with the cavity of the cavity filter 20, thereby ensuring the production efficiency of the coupling structure.
- the bottom of the cavity of the cavity filter 20 may be provided with an integrally formed boss 14
- the metal piece 13 is integrally formed with the boss 14 .
- the resonator 11 is fixed to the boss 14, and the resonator 11 can be fixed to the boss 14 by screw welding or direct welding.
- the bottom of the cavity of the cavity filter 20 may not be provided with a boss 14 , and the metal piece 13 is directly disposed at the bottom of the cavity of the cavity filter 20 and with the cavity of the cavity filter 20 .
- the bottom is integrally formed.
- the distance between the metal piece 13 and the corresponding resonator 11 is 0.3 to 1.0 mm, for example, 0.5 mm
- the distance between the metal piece 13 and the flying rod 121 of the corresponding cross-couple body 12 is 1.0 to 5.0 mm, for example, may be 1.0 mm
- the metal piece 13 completely blocks the corresponding cross-coupled body 12.
- the simulation bandwidth of the coupling structure is 23.2 MHz, which is smaller than the simulation bandwidth of 24.4 MHz when the metal piece 13 is not provided in the prior art, so that the cavity filter 20 adopting the coupling structure has stronger anti-interference ability when performing coupling. .
- the coupling structure of the present embodiment can be applied to a filter of a resonator 11 having three coaxial cavities, and the resonator 11 including the three coaxial cavities is described as an example:
- the first resonator and the second resonator are coupled by a first coupling window, and the second resonator and the third resonator are coupled by a second coupling window, and the coupling between the first resonator and the third resonator is This is achieved by the cross-couple body 12 and the metal piece 13 disposed between the first resonator and the third resonator.
- the first resonator and the third resonator are the resonators 11 of the two coaxial cavities shown in FIG.
- the coupling strength between the first resonator and the third resonator passes through the cross-coupling body 12 and
- the distance between the cover plates 21 is controlled, that is, the smaller the distance between the cross-coupled body 12 and the cover plate 21, the higher the coupling strength, and the greater the distance between the cross-coupled body 12 and the cover plate 21, the more the coupling strength is. low.
- the coupling structure of the present embodiment is also applicable to a filter of the resonator 11 having three or more coaxial cavities, and the filter includes N (N is an integer of four or more) coaxial cavity resonators.
- N is an integer of four or more
- the cross-couple body 12 disposed between the first resonator and the N-th resonator is realized by the metal piece 13.
- the first resonator and the Nth resonator are the resonators 11 of the two coaxial cavities shown in FIG.
- the metal piece 13 of this embodiment must be a good conductive material, such as pure aluminum or other silver-plated material. Both sides of the metal piece 13 can completely ensure an extremely small distance between the resonator 11 shown in FIG. 1 and the flying rod 121 of the cross-couple body 12 by precision machining, and the flywheel 121 of the resonator 11 and the cross-couple body 12 The distance between them is also completely ensured that the error is small, so that the tolerance of the distance between the metal piece 13 and the cross-couple body 12 is small, resulting in a small change in the coupling amount, that is, the cross-coupling body 12 and the resonator 11 can be ensured. The amount of coupling between the consistency.
- the bottom of the cavity of the metal piece 13 cavity filter 20 is integrally formed, the assembly error between the resonator 11 and the cross-coupling body 12 is reduced compared to the prior art, without disassembling the cavity filter 20
- the cover plate 21 is used to replace the cross-coupling body 12, so that production efficiency can be improved and cost can be reduced.
- the duplexer 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, and the transmission filter 52 is connected to the transmission terminal 55 and the antenna terminal 54.
- the receiving filter 51 and the transmitting filter 52 are the above-described cavity filter 20.
- the radio remote device 60 includes a radio frequency transceiver module 61, a power amplifier module 62, a duplexer 63, and a power module 64.
- the duplexer 63 can have a duplexer with the structure shown in FIG.
- the transceiver module 61 is connected to the power amplifier module 62, and the power amplifier module 62 is connected to the duplexer 63.
- the power module 64 is used to supply power to the radio remote device 60.
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Abstract
本发明提供一种腔体滤波器的耦合结构、腔体滤波器及双工器。该耦合结构包括谐振器以及与谐振器相对设置且进行信号耦合的交叉耦合体，谐振器和交叉耦合体之间设有金属片，金属片与腔体滤波器的腔体一体成型，金属片和交叉耦合体之间信号耦合。本发明的耦合结构将交叉耦合体与谐振器之间的耦合转换为交叉耦合体与金属片之间的耦合，金属片与交叉耦合体之间的距离的公差较小，能够确保交叉耦合体与谐振器之间耦合量的一致性，还能避免现有技术中需要将滤波器的盖板拆卸以更换交叉耦合体，提高生产效率，降低成本。
Description
【技术领域】
本发明涉及无线通信技术领域，具体涉及一种腔体滤波器的耦合结构、腔体滤波器及双工器。
【背景技术】
在射频滤波器的设计中，为使滤波器到达更好的抑制要求，通常需要在非相邻的谐振器之间增加交叉耦合结构以增大耦合量。交叉耦合结构由交叉耦合体和支撑介质组成，交叉耦合体和谐振器之间的距离决定了耦合量，距离越小，耦合量越大。
当交叉耦合体与谐振器之间的距离很小时，它们之间的微小距离的变化会对耦合量产生较大影响，从而谐振器和交叉耦合体之间的装配误差对交叉耦合体与谐振器之间的距离影响较大，导致耦合量的波动也很大，影响耦合量的一致性。然而，为了确保耦合量的一致性，业界又通常需要将滤波器的盖板拆卸以更换交叉耦合体或调整谐振器和交叉耦合体之间的装配位置，导致生产效率低，维修成本高。
【发明内容】
有鉴于此，本发明实施例所要解决的技术问题是提供一种腔体滤波器的耦合结构、腔体滤波器及双工器，能够确保交叉耦合体与谐振器之间耦合量的一致性，并且生产效率高，维修成本低。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种腔体滤波器的耦合结构，包括谐振器以及与谐振器相对设置且进行信号耦合的交叉耦合体，谐振器和交叉耦合体之间设有金属片，金属片与腔体滤波器的腔体一体成型，金属片和交叉耦合体之间信号耦合。
其中，腔体滤波器的腔体底部设置有一体成型的凸台，金属片与凸台一体成型，且谐振器固定于凸台上。
其中，谐振器焊接固定于凸台上。
其中，谐振器螺钉锁附固定于凸台上。
其中，金属片设置在腔体滤波器的腔体底部。
其中，金属片完全遮挡交叉耦合体。
其中，金属片与谐振器之间的距离为0.3~1.0毫米，金属片与交叉耦合体之间的距离为1.0~5.0毫米。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种腔体滤波器，包括腔体，封盖腔体的盖板，腔体内有多个由隔离壁隔开的谐振腔，腔体内设有耦合结构，耦合结构包括设置在腔体内的谐振器以及设置在至少两个不相邻的谐振腔之间的交叉耦合体，谐振器与交叉耦合体相对设置且进行信号耦合，谐振器和交叉耦合体之间设有金属片，金属片与腔体滤波器的腔体一体成型，金属片和交叉耦合体之间信号耦合。
其中，腔体滤波器的腔体底部设置有一体成型的凸台，金属片与凸台一体成型，且谐振器固定于凸台上。
其中，谐振器焊接固定于凸台上。
其中，谐振器螺钉锁附固定于凸台上。
其中，金属片设置在腔体滤波器的腔体底部。
其中，金属片完全遮挡交叉耦合体。
其中，金属片与谐振器之间的距离为0.3~1.0毫米，金属片与交叉耦合体之间的距离为1.0~5.0毫米。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种双工器，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，接收滤波器和发射滤波器上述腔体滤波器。
发明通过上述技术方案，本发明实施例所产生的有益效果是：区别于现有技术，本发明提供的滤波器耦合结构将交叉耦合体与谐振器之间的耦合转换为交叉耦合体与金属片之间的耦合，金属片与滤波器腔体一体成型，使得金属片与交叉耦合体之间的距离的公差较小，耦合量的误差较小，从而能够提高交叉耦合体与谐振器之间耦合量的一致性。进一步地，避免了现有技术中谐振器和交叉耦合体之间的装配误差较大，并且需要将滤波器的盖板拆卸以更换交叉耦合体，可以提高生产效率，降低成本。
【附图说明】
图1是本发明具有耦合结构的腔体滤波器一实施例的截面结构示意图；
图2是本发明双工器一实施例的原理框图；
图3是本发明射频拉远设备一实施例的原理框图。
【具体实施方式】
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，本发明以下所描述的实施例仅仅是本发明的一部分实施例，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它实施例，都属于本发明保护的范围。
图1是本发明具有耦合结构的腔体滤波器一实施例的截面结构示意图。请参阅图1所示，腔体滤波器20包括腔体、封盖腔体的盖板21，腔体内有多个由隔离壁23隔开的谐振腔，腔体内设有耦合结构。本实施例的耦合结构包括设置在腔体内的谐振器11以及与谐振器11相对设置的交叉耦合体12，且谐振器11和交叉耦合体12之间设置有金属片13，金属片13和交叉耦合体12之间信号耦合，从而使得谐振器11和交叉耦合体12之间进行信号耦合。
本实施例优选金属片13与腔体滤波器20的腔体一体成型，从而保证耦合结构的生产效率。具体地，腔体滤波器20的腔体底部可以设置有一体成型的凸台14，金属片13与凸台14一体成型。
另外，谐振器11固定在凸台14上，实际实现时谐振器11可以通过螺钉焊接或直接焊接固定在凸台14上。
当然，在其他实施例中，腔体滤波器20的腔体底部可以不设置凸台14，金属片13直接设置在腔体滤波器20的腔体底部，并且与腔体滤波器20的腔体底部一体成型。
在本实施例中，金属片13与对应的谐振器11之间的距离为0.3~1.0毫米，例如可以为0.5毫米，金属片13与对应的交叉耦合体12的飞杆121之间的距离为1.0~5.0毫米，例如可以为1.0毫米，且金属片13完全遮挡对应的交叉耦合体12。基于此，耦合结构的仿真带宽为23.2兆赫，小于现有技术中未设置金属片13时的仿真带宽24.4兆赫，使得采用耦合结构的腔体滤波器20在进行耦合时具有更强的抗干扰能力。
本实施例的耦合结构可适用于具有三个同轴腔体的谐振器11的滤波器，以滤波器包括三个同轴腔体的谐振器11为例进行描述：
第一谐振器和第二谐振器之间通过第一耦合窗口进行耦合，第二谐振器和第三谐振器通过第二耦合窗口进行耦合，第一谐振器和第三谐振器之间的耦合是通过设置于第一谐振器和第三谐振器之间的交叉耦合体12与金属片13来实现的。此时，第一谐振器和第三谐振器即为图1所示的两个同轴腔体的谐振器11，第一谐振器和第三谐振器之间的耦合强度通过交叉耦合体12与盖板21之间的距离来控制，即，交叉耦合体12与盖板21之间的距离越小则耦合强度越高，交叉耦合体12与盖板21之间的距离越大则耦合强度越低。
另外，本实施例的耦合结构还可适用于具有三个以上同轴腔体的谐振器11的滤波器，以滤波器包括N个（N为大于等于四的整数）同轴腔体的谐振器11为例进行描述：
第一谐振器和第二谐振器之间，直至第N-1谐振器与第N谐振器之间均是通过耦合窗口进行耦合，而第一谐振器和第N谐振器之间的耦合是通过设置于第一谐振器和第N谐振器之间的交叉耦合体12与金属片13来实现的。此时，第一谐振器和第N谐振器即为图1所示的两个同轴腔体的谐振器11，第一谐振器和第N谐振器之间的耦合强度通过交叉耦合体12与盖板21之间的距离来控制，即，交叉耦合体12与盖板21之间的距离越小则耦合强度越高，交叉耦合体12与盖板21之间的距离越大则耦合强度越低。
本实施例的金属片13必须是良好的导电材料，例如纯铝或者其他表面镀银的材质等。金属片13的两侧通过精密加工完全能够保证图1所示的谐振器11和交叉耦合体12的飞杆121之间的极小的距离，并且谐振器11与交叉耦合体12的飞杆121之间的距离也完全能够保证误差较小，从而使得金属片13与交叉耦合体12之间的距离的公差较小，导致耦合量的变化较小，即能够确保交叉耦合体12与谐振器11之间耦合量的一致性。
进一步地，由于金属片13腔体滤波器20的腔体底部一体成型，相比较现有技术，减小了谐振器11和交叉耦合体12之间的装配误差，无需拆卸腔体滤波器20的盖板21以更换交叉耦合体12，从而可以提高生产效率，并且能够降低成本。
图2是本发明双工器一实施例的原理框图。如图2所示，双工器包括接收滤波器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54之间，接收滤波器51和发射滤波器52为上述腔体滤波器20。
图3是本发明射频拉远设备一实施例的原理框图。如图3所示，射频拉远设备60包括射频收发信机模块61、功放模块62、双工器63以及电源模块64，其中双工器63可以具有图2所示结构的双工器，射频收发信机模块61与功放模块62连接，功放模块62与双工器63连接，电源模块64用于为射频拉远设备60供电。
再次说明，以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，例如各实施例之间技术特征的相互结合，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。
Claims (15)
- 一种腔体滤波器的耦合结构，其特征在于，包括谐振器以及与所述谐振器相对设置且进行信号耦合的交叉耦合体，所述谐振器和所述交叉耦合体之间设有金属片，所述金属片与所述腔体滤波器的腔体一体成型，所述金属片和所述交叉耦合体之间信号耦合。
- 根据权利要求1所述的耦合结构，其特征在于，所述腔体滤波器的腔体底部设置有一体成型的凸台，所述金属片与所述凸台一体成型，且所述谐振器固定于所述凸台上。
- 根据权利要求2所述的耦合结构，其特征在于，所述谐振器焊接固定于所述凸台上。
- 根据权利要求2所述的耦合结构，其特征在于，所述谐振器螺钉锁附固定于所述凸台上。
- 根据权利要求1所述的耦合结构，其特征在于，所述金属片设置在所述腔体滤波器的腔体底部。
- 根据权利要求1所述的耦合结构，其特征在于，所述金属片完全遮挡所述交叉耦合体。
- 根据权利要求1-6所述的耦合结构，其特征在于，所述金属片与所述谐振器之间的距离为0.3~1.0毫米，所述金属片与所述交叉耦合体之间的距离为1.0~5.0毫米。
- 一种腔体滤波器，其特征在于，包括腔体，封盖所述腔体的盖板，所述腔体内有多个由隔离壁隔开的谐振腔，所述腔体内设有耦合结构，所述耦合结构包括设置在所述腔体内的谐振器以及设置在至少两个不相邻的谐振腔之间的交叉耦合体，所述谐振器与所述交叉耦合体相对设置且进行信号耦合，所述谐振器和所述交叉耦合体之间设有金属片，所述金属片与所述腔体滤波器的腔体一体成型，所述金属片和所述交叉耦合体之间信号耦合。
- 根据权利要求8所述的腔体滤波器，其特征在于，所述腔体滤波器的腔体底部设置有一体成型的凸台，所述金属片与所述凸台一体成型，且所述谐振器固定于所述凸台上。
- 根据权利要求9所述的腔体滤波器，其特征在于，所述谐振器焊接固定于所述凸台上。
- 根据权利要求9所述的腔体滤波器，其特征在于，所述谐振器螺钉锁附固定于所述凸台上。
- 根据权利要求8所述的腔体滤波器，其特征在于，所述金属片设置在所述腔体滤波器的腔体底部。
- 根据权利要求8所述的腔体滤波器，其特征在于，所述金属片完全遮挡所述交叉耦合体。
- 根据权利要求8-13所述的腔体滤波器，其特征在于，所述金属片与所述谐振器之间的距离为0.3~1.0毫米，所述金属片与所述交叉耦合体之间的距离为1.0~5.0毫米。
- 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1-14任意一项所述的腔体滤波器。
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