WO2020118523A1 - Dielectric waveguide filter having two cavities and four modes - Google Patents
Dielectric waveguide filter having two cavities and four modes Download PDFInfo
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- WO2020118523A1 WO2020118523A1 PCT/CN2018/120304 CN2018120304W WO2020118523A1 WO 2020118523 A1 WO2020118523 A1 WO 2020118523A1 CN 2018120304 W CN2018120304 W CN 2018120304W WO 2020118523 A1 WO2020118523 A1 WO 2020118523A1
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- resonant cavity
- mode
- dielectric waveguide
- waveguide filter
- cavity
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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
Definitions
- the invention relates to the field of mobile communication, in particular to a dielectric waveguide filter.
- the dielectric waveguide filter Limited by the size and performance requirements of the filter, it is often difficult for the dielectric waveguide filter to use a single transmission mode to meet the requirements.
- the purpose of the present invention is to solve the technical deficiencies of existing small-size dielectric waveguide filters that cannot meet the requirements using a single transmission mode, and to propose a dual-cavity four-mode dielectric waveguide filter.
- the adopted technical solution is: a dual-cavity four-mode dielectric waveguide filter including a dielectric waveguide filter body and an input coupling probe and an output fixed on the dielectric waveguide filter body A coupling probe; characterized in that: the main body of the dielectric waveguide filter includes a first resonant cavity and a second resonant cavity, and the input coupling probe and the output coupling probe are respectively connected to the first resonant cavity and the second resonant cavity, the first The resonant cavity and the second resonant cavity are linearly distributed in a straight-line structure; the first resonant cavity and the second resonant cavity are coupled through a dielectric waveguide filter window; the first mode and the second mode in the first resonant cavity and the second The third mode and the fourth mode in the resonant cavity are coupled by coupling steps, respectively.
- the first mode in the first resonant cavity and the fourth mode in the second resonant cavity are coupled through a first coupling window, and the second mode in the first resonant cavity and the second resonance
- the third mode of the cavity is coupled through the second coupling window;
- the first mode and the second mode in the first resonant cavity are coupled by the first coupling step at the corner of the cavity, the third mode and the fourth in the second resonant cavity
- the modes are coupled through the second coupling step at the corner of the cavity.
- the dielectric waveguide filter of the double cavity four-mode structure of the present invention adjusts the filter frequency by adjusting the size of the two resonant cavities, and adjusts the depth of the two coupling steps and the two coupling windows
- the size is used to adjust the width of the filter passband and the distance of the transmission zero outside the passband. Its structure is simple and reasonable, and it can effectively implement a dual-cavity four-mode dielectric waveguide filter.
- FIG. 1 is a schematic structural diagram of the present invention.
- a dual cavity four-mode dielectric waveguide filter of the present invention includes a dielectric waveguide filter body and an input coupling probe 1 and an output coupling probe 2 fixed on the dielectric waveguide filter body;
- the main body of the dielectric waveguide filter includes a first resonant cavity 3 and a second resonant cavity 4, the input coupling probe 1 and the output coupling probe 2 are respectively connected to the first resonant cavity 3 and the second resonant cavity 4, the first resonant cavity 3 Linearly distributed with the second resonant cavity 4 in a straight line structure; the first resonant cavity 3 and the second resonant cavity 4 are coupled through a dielectric waveguide filter window, specifically: the first mode and The fourth mode of the second resonant cavity 4 is coupled through the first coupling window 7, the second mode in the first resonant cavity 3 is coupled with the third mode of the second resonant cavity 4 through the second coupling window 8; and the first resonant cavity 3
- the first mode and the second mode are
- the electric field directions of the TE10 mode and the TE01 mode in the two resonant cavities of the present invention have components on the X axis and the Y axis.
- the first resonant cavity 3 and the second resonant cavity 4 are realized by the first coupling step 5 and the second coupling step 6
- the first mode is coupled with the second mode and the third mode is coupled with the fourth mode
- the second mode is coupled with the third mode
- the first mode is coupled with the fourth mode through the second coupling window 8 and the first coupling window 7,
- the strength of the first mode and the fourth mode is adjusted by the size of the first coupling window 7.
- the tuning of the resonance frequency of the filter is achieved by changing the size of the first resonance cavity 3 and the second resonance cavity 4, by tuning the depth of the first coupling step 5 and the second coupling step 6, the first coupling window 7 and the second coupling
- the size of the window 8 is used to tune the filter passband width, as well as the distance of the out-of-band transmission zero.
- the invention realizes a double cavity four-mode dielectric waveguide filter through the above technology, which has a simple structure, excellent performance, small volume, and is convenient for production and processing.
Abstract
A dielectric waveguide filter having two cavities and four modes relates to the field of mobile communication, and in particular to a dielectric waveguide filter. The invention solves the technical problem in which an existing small dielectric waveguide filter using a single transmission mode does not often meet requirements. A main body of the dielectric waveguide filter comprises a first resonant cavity and a second resonant cavity. An input coupling probe and an output coupling probe are respectively connected to the first resonant cavity and the second resonant cavity. The first resonant cavity and the second resonant cavity are arranged to form a straight line. The first resonant cavity is coupled to the second resonant cavity by means of a dielectric waveguide filter window. A first mode and a second mode of the first resonant cavity are respectively coupled to a third mode and a fourth mode of the second resonant cavity by means of coupling steps. The dielectric waveguide filter having two cavities and four modes has a simple structure and favorable performance, is small, and is easy to manufacture.
Description
本发明涉及到移动通信领域，特别是一种介质波导滤波器。The invention relates to the field of mobile communication, in particular to a dielectric waveguide filter.
在移动通信领域，随着技术的发展，对于系统内滤波器的性能要求越来越高。伴随5G移动通信标准确立，设备系统性能的提高，基站端大功率微波滤波器呈现出指标高，体积小，低成本的特征。在实现这些高性能滤波器的时候，受限于腔体尺寸，滤波器需要使用新的材料或技术实现。在传输频率处于高频时，为了满足损耗和抑制等性能要求，会选择介质波导滤波器。介质波导滤波器具有尺寸小，性能高等优势，在滤波器的应用中广泛采用。In the field of mobile communications, with the development of technology, the performance requirements of filters in the system are getting higher and higher. With the establishment of 5G mobile communication standards and the improvement of equipment system performance, high-power microwave filters at the base station end have the characteristics of high index, small size and low cost. When implementing these high-performance filters, due to the size of the cavity, the filter needs to be implemented using new materials or technologies. When the transmission frequency is at a high frequency, in order to meet performance requirements such as loss and suppression, a dielectric waveguide filter is selected. Dielectric waveguide filters have the advantages of small size and high performance, and are widely used in filter applications.
受限于滤波器的尺寸，性能等要求，往往介质波导滤波器使用单一传输模式难以符合要求。Limited by the size and performance requirements of the filter, it is often difficult for the dielectric waveguide filter to use a single transmission mode to meet the requirements.
本发明的目的在于解决现有的小尺寸介质波导滤波器使用单一传输模式难以符合要求的技术不足，而提出一种双腔四模介质波导滤波器。The purpose of the present invention is to solve the technical deficiencies of existing small-size dielectric waveguide filters that cannot meet the requirements using a single transmission mode, and to propose a dual-cavity four-mode dielectric waveguide filter.
为解决本发明所提出的技术问题，采用的技术方案为：一种双腔四模介质波导滤波器，包括有介质波导滤波器主体和固定于介质波导滤波器主体上的输入耦合探针和输出耦合探针；其特征在于： 所述的介质波导滤波器主体包括第一谐振腔和第二谐振腔，输入耦合探针和输出耦合探针分别连接第一谐振腔和第二谐振腔，第一谐振腔和第二谐振腔呈一字型结构直线分布；第一谐振腔与第二谐振腔间通过介质波导滤波器窗口耦合；第一谐振腔内第一模式与第二模式之间和第二谐振腔内第三模式与第四模式之间分别通过耦合台阶耦合。In order to solve the technical problems proposed by the present invention, the adopted technical solution is: a dual-cavity four-mode dielectric waveguide filter including a dielectric waveguide filter body and an input coupling probe and an output fixed on the dielectric waveguide filter body A coupling probe; characterized in that: the main body of the dielectric waveguide filter includes a first resonant cavity and a second resonant cavity, and the input coupling probe and the output coupling probe are respectively connected to the first resonant cavity and the second resonant cavity, the first The resonant cavity and the second resonant cavity are linearly distributed in a straight-line structure; the first resonant cavity and the second resonant cavity are coupled through a dielectric waveguide filter window; the first mode and the second mode in the first resonant cavity and the second The third mode and the fourth mode in the resonant cavity are coupled by coupling steps, respectively.
作为对本发明作进一步限定的技术方案为：所述的第一谐振腔内第一模式与第二谐振腔的第四模式通过第一耦合窗口耦合，第一谐振腔内第二模式与第二谐振腔的第三模式通过第二耦合窗口耦合；第一谐振腔内第一模式与第二模式之间通过腔体边角处的第一耦合台阶耦合，第二谐振腔内第三模式与第四模式之间通过腔体边角处的通过第二耦合台阶耦合。As a technical solution for further defining the present invention, the first mode in the first resonant cavity and the fourth mode in the second resonant cavity are coupled through a first coupling window, and the second mode in the first resonant cavity and the second resonance The third mode of the cavity is coupled through the second coupling window; the first mode and the second mode in the first resonant cavity are coupled by the first coupling step at the corner of the cavity, the third mode and the fourth in the second resonant cavity The modes are coupled through the second coupling step at the corner of the cavity.
本发明有益效果为：与现有技术相比，本发明的采用双腔四模结构的介质波导滤波器，通过调节两谐振腔尺寸来调节滤波器频率，通过调节两耦合台阶深浅和两耦合窗口大小来调节滤波器通带宽度以及通带外传输零点远近，其结构简单、合理，能够有效的实现双腔四模介质波导滤波器。The beneficial effects of the present invention are: compared with the prior art, the dielectric waveguide filter of the double cavity four-mode structure of the present invention adjusts the filter frequency by adjusting the size of the two resonant cavities, and adjusts the depth of the two coupling steps and the two coupling windows The size is used to adjust the width of the filter passband and the distance of the transmission zero outside the passband. Its structure is simple and reasonable, and it can effectively implement a dual-cavity four-mode dielectric waveguide filter.
图1为本发明的结构示意图。FIG. 1 is a schematic structural diagram of the present invention.
以下结合附图和本发明优选的具体实施例对本发明的结构作进一步地说明。The structure of the present invention will be further described below with reference to the drawings and preferred specific embodiments of the present invention.
参照图1中所示，本发明一种双腔四模介质波导滤波器，包括有介质波导滤波器主体和固定于介质波导滤波器主体上的输入耦合探针1和输出耦合探针2；所述的介质波导滤波器主体包括第一谐振腔3和第二谐振腔4，输入耦合探针1和输出耦合探针2分别连接第一谐振腔3和第二谐振腔4，第一谐振腔3和第二谐振腔4呈一字型结构直线分布；第一谐振腔3与第二谐振腔4间通过介质波导滤波器窗口耦合，具体为：所述的第一谐振腔3内第一模式与第二谐振腔4的第四模式通过第一耦合窗口7耦合，第一谐振腔3内第二模式与第二谐振腔4的第三模式通过第二耦合窗口8耦合；而第一谐振腔3内第一模式与第二模式之间通过第一谐振腔3腔体边角处的第一耦合台阶5耦合，第二谐振腔4内第三模式与第四模式之间通过第二谐振腔4腔体边角处的通过第二耦合台阶6耦合。Referring to FIG. 1, a dual cavity four-mode dielectric waveguide filter of the present invention includes a dielectric waveguide filter body and an input coupling probe 1 and an output coupling probe 2 fixed on the dielectric waveguide filter body; The main body of the dielectric waveguide filter includes a first resonant cavity 3 and a second resonant cavity 4, the input coupling probe 1 and the output coupling probe 2 are respectively connected to the first resonant cavity 3 and the second resonant cavity 4, the first resonant cavity 3 Linearly distributed with the second resonant cavity 4 in a straight line structure; the first resonant cavity 3 and the second resonant cavity 4 are coupled through a dielectric waveguide filter window, specifically: the first mode and The fourth mode of the second resonant cavity 4 is coupled through the first coupling window 7, the second mode in the first resonant cavity 3 is coupled with the third mode of the second resonant cavity 4 through the second coupling window 8; and the first resonant cavity 3 The first mode and the second mode are coupled through the first coupling step 5 at the corner of the cavity of the first resonant cavity 3, and the second mode 4 passes through the second resonant cavity 4 between the third mode and the fourth mode The corners of the cavity are coupled by the second coupling step 6.
也即是本发明的两谐振腔中TE10模和TE01模电场方向在X轴和Y轴存在分量，通过第一耦合台阶5和第二耦合台阶6实现第一谐振腔3与第二谐振腔4的第一模式与第二模式耦合和第三模式与第四模式耦合，通过第二耦合窗口8和第一耦合窗口7实现第二模式与第三模式耦合以及第一模式与第四模式耦合，通过第一耦合窗口7尺寸大小调节第一模式与第四模式的强弱。通过改变第一谐振腔3和第二谐振腔4的尺寸大小来实现滤波器谐振频率的调谐，通过调谐第一耦合台阶5和第二耦合台阶6的深浅，第一耦合窗口7和第二耦合窗口8大小来调谐滤波器通带宽度，以及滤波器带外传输零点远近。That is, the electric field directions of the TE10 mode and the TE01 mode in the two resonant cavities of the present invention have components on the X axis and the Y axis. The first resonant cavity 3 and the second resonant cavity 4 are realized by the first coupling step 5 and the second coupling step 6 The first mode is coupled with the second mode and the third mode is coupled with the fourth mode, the second mode is coupled with the third mode and the first mode is coupled with the fourth mode through the second coupling window 8 and the first coupling window 7, The strength of the first mode and the fourth mode is adjusted by the size of the first coupling window 7. The tuning of the resonance frequency of the filter is achieved by changing the size of the first resonance cavity 3 and the second resonance cavity 4, by tuning the depth of the first coupling step 5 and the second coupling step 6, the first coupling window 7 and the second coupling The size of the window 8 is used to tune the filter passband width, as well as the distance of the out-of-band transmission zero.
本发明通过以上技术实现了一种双腔四模介质波导滤波器，结构简单，性能优良，体积小，方便生产加工。The invention realizes a double cavity four-mode dielectric waveguide filter through the above technology, which has a simple structure, excellent performance, small volume, and is convenient for production and processing.
本实用新型的最佳实施例已阐明，由本领域技术人员做出的各种变化或改型都不会脱离本实用新型的范围。The best embodiment of the present invention has clarified that various changes or modifications made by those skilled in the art will not deviate from the scope of the present invention.
Claims (2)
- 一种双腔四模介质波导滤波器，包括有介质波导滤波器主体和固定于介质波导滤波器主体上的输入耦合探针和输出耦合探针；其特征在于： 所述的介质波导滤波器主体包括第一谐振腔和第二谐振腔，输入耦合探针和输出耦合探针分别连接第一谐振腔和第二谐振腔，第一谐振腔和第二谐振腔呈一字型结构直线分布；第一谐振腔与第二谐振腔间通过介质波导滤波器窗口耦合；第一谐振腔内第一模式与第二模式之间和第二谐振腔内第三模式与第四模式之间分别通过耦合台阶耦合。A dual-cavity four-mode dielectric waveguide filter includes a dielectric waveguide filter body and an input coupling probe and an output coupling probe fixed on the dielectric waveguide filter body; the characteristics are as follows: The main body of the dielectric waveguide filter includes a first resonant cavity and a second resonant cavity. The input coupling probe and the output coupling probe are respectively connected to the first resonant cavity and the second resonant cavity. The first resonant cavity and the second resonant cavity are Straight-line structure is linearly distributed; the first resonant cavity and the second resonant cavity are coupled through a dielectric waveguide filter window; the first mode and the second mode in the first resonant cavity and the third mode and the second mode in the second resonant cavity The four modes are coupled through coupling steps.
- 根据权利要求1所述的一种双腔四模介质波导滤波器，其特征在于：所述的第一谐振腔内第一模式与第二谐振腔的第四模式通过第一耦合窗口耦合，第一谐振腔内第二模式与第二谐振腔的第三模式通过第二耦合窗口耦合；第一谐振腔内第一模式与第二模式之间通过腔体边角处的第一耦合台阶耦合，第二谐振腔内第三模式与第四模式之间通过腔体边角处的通过第二耦合台阶耦合。The dual cavity four-mode dielectric waveguide filter according to claim 1, wherein the first mode in the first resonant cavity and the fourth mode in the second resonant cavity are coupled through a first coupling window, The second mode in a resonant cavity is coupled to the third mode of the second resonant cavity through a second coupling window; the first mode and the second mode in the first resonant cavity are coupled through a first coupling step at the corner of the cavity, The third mode and the fourth mode in the second resonant cavity are coupled through the second coupling step at the corner of the cavity.
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| US20120049983A1 (en) * | 2010-07-02 | 2012-03-01 | Electronics And Telecommunications Research Institute | Diplexer, and resonator filters combined with dual mode and triple-mode resonators |
| CN103972621A (en) * | 2014-04-22 | 2014-08-06 | 深圳三星通信技术研究有限公司 | Mixed dielectric waveguide filter |
| CN105244571A (en) * | 2015-09-17 | 2016-01-13 | 深圳三星通信技术研究有限公司 | Dielectric waveguide filter |
| CN108832240A (en) * | 2018-06-07 | 2018-11-16 | 张家港保税区灿勤科技有限公司 | The dielectric waveguide filter that distal end inhibits can be improved |
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- 2018-12-11 WO PCT/CN2018/120304 patent/WO2020118523A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120049983A1 (en) * | 2010-07-02 | 2012-03-01 | Electronics And Telecommunications Research Institute | Diplexer, and resonator filters combined with dual mode and triple-mode resonators |
| CN103972621A (en) * | 2014-04-22 | 2014-08-06 | 深圳三星通信技术研究有限公司 | Mixed dielectric waveguide filter |
| CN105244571A (en) * | 2015-09-17 | 2016-01-13 | 深圳三星通信技术研究有限公司 | Dielectric waveguide filter |
| CN108832240A (en) * | 2018-06-07 | 2018-11-16 | 张家港保税区灿勤科技有限公司 | The dielectric waveguide filter that distal end inhibits can be improved |
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