WO2019109735A1 - Waveguide filter having adjustable bandwidth - Google Patents

Waveguide filter having adjustable bandwidth Download PDF

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Publication number
WO2019109735A1
WO2019109735A1 PCT/CN2018/110560 CN2018110560W WO2019109735A1 WO 2019109735 A1 WO2019109735 A1 WO 2019109735A1 CN 2018110560 W CN2018110560 W CN 2018110560W WO 2019109735 A1 WO2019109735 A1 WO 2019109735A1
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dielectric
rod
driving
screw
cavity
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PCT/CN2018/110560
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French (fr)
Chinese (zh)
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谢瑞华
王旭
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罗森伯格技术(昆山)有限公司
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Priority to CN201721668291.7U priority Critical patent/CN208062225U/en
Priority to CN201721668291.7 priority
Application filed by 罗森伯格技术(昆山)有限公司 filed Critical 罗森伯格技术(昆山)有限公司
Publication of WO2019109735A1 publication Critical patent/WO2019109735A1/en

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00Auxiliary devices
    • H01P1/20Frequency-selective devices, e.g. filters
    • H01P1/207Hollow waveguide filters
    • H01P1/208Cascaded cavities; Cascaded resonators inside a hollow waveguide structure

Abstract

Disclosed is a waveguide filter having an adjustable bandwidth, comprising: a cavity; an input end and an output end arranged at the cavity; and at least three coupling windows. A first dielectric rod capable of bandwidth adjustment is provided in each coupling window. A distance to which the first dielectric rod is inserted into a resonant cavity is adjustable. At least three first dielectric rods are driven by the same driving device. The present invention employs a transmission mechanism to synchronously control bandwidth adjustment for multiple coupling windows, such that the number of required driving motors is reduced, thereby greatly reducing costs of a filter, simplifying the structure of the filter, increasing adjustment precision, and reducing size and weight of the filter.

Description

一种可调带宽的波导滤波器Waveguide filter with adjustable bandwidth 技术领域Technical field
本实用新型涉及一种无源器件滤波器,尤其是涉及一种可调带宽的波导滤波器。The utility model relates to a passive device filter, in particular to a waveguide filter with adjustable bandwidth.
背景技术Background technique
在通信领域,滤波器作为一种频率选择装置被广泛应用,其中,波导滤波器在现代微波通信、卫星通信、雷达及遥感遥测技术等系统中具有选频、分频及隔离信号等的重要作用,其性能优劣直接影响到系统的运行质量。波导滤波器一般采用腔体结构,一个腔体能够等效成电感并联电容,形成一个谐振级,达到滤波功能。传统波导滤波器的带宽都是固定不可调整的,所设计的带宽在出厂时已确定,无法满足特殊情况所需,可调滤波器应运而生。In the field of communication, filters are widely used as a frequency selection device. Among them, waveguide filters have important functions in frequency selection, frequency division and isolation signals in modern microwave communication, satellite communication, radar and remote sensing telemetry technologies. The performance of the system directly affects the quality of the system. The waveguide filter generally adopts a cavity structure, and a cavity can be equivalent to an inductance parallel capacitor to form a resonance level to achieve a filtering function. The bandwidth of the traditional waveguide filter is fixed and unadjustable. The designed bandwidth is determined at the factory and cannot meet the special conditions. The tunable filter is born.
随着无源器件技术的快速发展,一种电机驱动的可调波导滤波器被广泛使用,通过控制步进电机的正反转来控制调螺进入波导耦合窗的深浅,进而达到调整带宽的目的,控制方便且精度较高。With the rapid development of passive device technology, a motor-driven tunable waveguide filter is widely used to control the depth of the waveguide coupling window by controlling the forward and reverse of the stepping motor, thereby achieving the purpose of adjusting the bandwidth. The control is convenient and the precision is high.
传统的可调带宽的波导滤波器,通常在每一个波导耦合窗的调镙上边安装微电机,用这个电机控制每个调镙伸入波导耦合窗的深度,从而达到波导滤波器带宽可调。但很显然,随着滤波器级数的增加,需同样数量的电机来进行控制,电机数目多,使可调滤波器的成本急剧提高,体积大、重量大,同时,由于每个波导耦合窗的带宽受调螺的影响很大,为了精确控制每个调螺的位置和深度,对电机的精度要求很高,导致该类滤波器的成本很高。Conventional tunable bandwidth waveguide filters usually have micromotors mounted on the tuning of each waveguide coupling window. This motor is used to control the depth of each tuned into the waveguide coupling window to achieve adjustable waveguide filter bandwidth. However, it is clear that as the number of filter stages increases, the same number of motors are required for control, and the number of motors is large, so that the cost of the tunable filter is drastically increased, the volume is large, the weight is large, and at the same time, due to each waveguide coupling window The bandwidth is greatly affected by the snail. In order to accurately control the position and depth of each snail, the accuracy of the motor is very high, resulting in high cost of the filter.
实用新型内容Utility model content
本实用新型的目的在于克服现有技术的缺陷,提供一种可靠性高,且成本较低的可调带宽的波导滤波器。The purpose of the utility model is to overcome the defects of the prior art and provide a waveguide filter with adjustable bandwidth with high reliability and low cost.
为实现上述目的,本实用新型提出如下技术方案:一种可调带宽的波导滤波器,包括腔体,设置在所述腔体上的输入端、输出端,以及至少三个耦合窗,所述耦合窗形成于相邻两个谐振腔之间、所述输入端与与所述输入端相连的谐振腔之间及所述输出端与与所述输出端相连的谐振腔之间,所述可调带宽的波导滤波器还包括若干延伸入耦合窗内起调节带宽作用的第一介质棒,所述第一介质棒伸入所述耦合窗内的长度可调,且至少三个所述第一介质棒由第一驱动装置驱动。In order to achieve the above object, the present invention provides the following technical solution: a waveguide filter with adjustable bandwidth, including a cavity, an input end, an output end, and at least three coupling windows disposed on the cavity, a coupling window is formed between adjacent two resonant cavities, between the input end and a resonant cavity connected to the input end, and between the output end and a resonant cavity connected to the output end, The bandwidth-adjusting waveguide filter further includes a plurality of first dielectric rods extending into the coupling window to function as an adjustment bandwidth, the length of the first dielectric rod extending into the coupling window is adjustable, and at least three of the first The dielectric rod is driven by the first drive.
优选地,所述可调带宽的波导滤波器还包括若干延伸入谐振腔内起调频作用的第二介质棒,所述第二介质棒伸入所述谐振腔内的长度可调,至少两个所述第二介质棒由所述第一驱动装置驱动,或由第二驱动装置驱动。Preferably, the adjustable bandwidth waveguide filter further includes a plurality of second dielectric rods extending into the resonant cavity for frequency modulation, and the length of the second dielectric rod extending into the resonant cavity is adjustable, at least two The second dielectric rod is driven by the first drive or by a second drive.
优选地,所述第一和第二驱动装置均包括电机和传动机构,所述电机带动所述传动机构运动,所述第一介质棒和第二介质棒均与第一驱动装置的传动机构相连;或者第一介质棒与第一驱动装置的传动机构相连,第二介质棒与第二驱动装置的传动机构相连。Preferably, the first and second driving devices each comprise a motor and a transmission mechanism, the motor drives the transmission mechanism, and the first dielectric rod and the second dielectric rod are connected to the transmission mechanism of the first driving device. Or the first dielectric rod is connected to the transmission mechanism of the first driving device, and the second dielectric rod is connected to the transmission mechanism of the second driving device.
优选地,所述传动机构包括驱动丝杆和滑杆,所述驱动丝杆在所述电机的驱动下转动,所述滑杆与所述驱动丝杆螺纹连接,所述滑杆沿着所述驱动丝杆移动,所述第一介质棒和第二介质棒均与第一驱动装置的滑杆相连;或者第一介质棒与第一驱动装置的滑杆相连,第二介质棒与第二驱动装置的滑杆相连。Preferably, the transmission mechanism includes a driving screw and a sliding rod, the driving screw is driven by the motor, the sliding rod is screwed with the driving screw, and the sliding rod is along the Driving the screw rod, the first dielectric rod and the second dielectric rod are connected to the sliding rod of the first driving device; or the first dielectric rod is connected to the sliding rod of the first driving device, the second dielectric rod and the second driving The sliders of the device are connected.
优选地,所述传动机构还包括从动丝杆,所述从动丝杆与所述驱动丝杆平行设置,所述滑杆套装在所述从动丝杆上,并沿所述从动丝杆滑动。Preferably, the transmission mechanism further includes a driven screw rod, the driven screw rod is disposed in parallel with the driving screw rod, and the sliding rod is fitted on the driven screw rod and along the driven wire The rod slides.
优选地,所述腔体在靠近所述传动机构一侧的腔体壁上形成有与第一介质棒数量一致或与第一介质棒和第二介质棒数量之和一致的过孔,所述 第一介质棒由所述过孔延伸到对应的耦合窗内,所述第二介质棒由所述过孔延伸到对应的谐振腔内。Preferably, the cavity is formed with a via having a number of first dielectric bars or a sum of the first dielectric bar and the second dielectric bar on a wall of the cavity near the side of the transmission mechanism, A first dielectric rod extends from the via into a corresponding coupling window, the second dielectric rod extending from the via into a corresponding resonant cavity.
优选地,所述可调带宽的波导滤波器还包括延伸入所述耦合窗和所述谐振腔内的调谐螺钉,所述第一介质棒和第二介质棒与对应的所述调谐螺钉垂直设置。Preferably, the adjustable bandwidth waveguide filter further includes a tuning screw extending into the coupling window and the resonant cavity, the first dielectric bar and the second dielectric bar being vertically disposed with the corresponding tuning screw .
优选地,所有所述第一介质棒和第二介质棒均由所述第一驱动装置驱动,或者所有所述第一介质棒均由所述第一驱动装置驱动,所有所述第二介质棒均由所述第二驱动装置驱动。Preferably, all of the first dielectric rod and the second dielectric rod are driven by the first driving device, or all of the first dielectric rods are driven by the first driving device, all of the second dielectric rods Both are driven by the second drive.
优选地,所述谐振腔为波导腔,所述耦合窗为波导耦合窗。Preferably, the resonant cavity is a waveguide cavity, and the coupling window is a waveguide coupling window.
优选地,所述第一介质棒和第二介质棒沿着各自的轴向方向伸缩运动。Preferably, the first dielectric rod and the second dielectric rod telescopically move in respective axial directions.
本实用新型通过一个传动机构同步控制多个耦合窗的带宽调节,使每个耦合窗同时调到所需的带宽,该方案解决了由于空间狭小耦合窗没有空间安装电机的难点。且由于减少了驱动电机的数量,不仅大大降低了滤波器的成本,而且简化了滤波器的结构,提高调节精度和可靠性,减小了滤波器的体积和重量。The utility model synchronously controls the bandwidth adjustment of a plurality of coupling windows by a transmission mechanism, so that each coupling window is simultaneously adjusted to a required bandwidth, and the solution solves the difficulty of installing the motor due to the space-small coupling window without space. Moreover, since the number of driving motors is reduced, the cost of the filter is greatly reduced, the structure of the filter is simplified, the adjustment accuracy and reliability are improved, and the volume and weight of the filter are reduced.
附图说明DRAWINGS
图1是本实用新型实施例1的结构示意图;1 is a schematic structural view of Embodiment 1 of the present invention;
图2是本实用新型实施例2的结构示意图;Figure 2 is a schematic structural view of Embodiment 2 of the present invention;
图3是本实用新型实施例3的结构示意图。3 is a schematic structural view of Embodiment 3 of the present invention.
附图标记:Reference mark:
1、腔体,2、谐振腔,3、耦合窗,4、调谐螺钉,5、第一介质棒,6、第一电机,7、第一传动机构,71、第一驱动丝杆,72、第一从动丝杆,73、第一滑杆,8、信号输入端,9、信号输出端,10、第二介质棒,11、第二电机,12、第二传动机构,121、第二驱动丝杆,122、第二从动丝杆,123、第二滑杆。1, cavity, 2, resonant cavity, 3, coupling window, 4, tuning screw, 5, the first dielectric rod, 6, the first motor, 7, the first transmission mechanism, 71, the first drive screw, 72, First driven screw, 73, first slider, 8, signal input terminal, 9, signal output terminal, 10, second dielectric rod, 11, second motor, 12, second transmission mechanism, 121, second The driving screw, 122, the second driven screw, 123, and the second sliding rod.
具体实施方式Detailed ways
下面将结合本实用新型的附图,对本实用新型实施例的技术方案进行清楚、完整的描述。The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention.
本实用新型所揭示的一种可调带宽的波导滤波器,采用窗口介质棒补偿波导谐振腔间耦合的方式,将所有耦合窗的介质棒连接成一体,通过一个微电机带动,从而带动整个波导滤波器的带宽变化。The waveguide filter with adjustable bandwidth disclosed by the utility model adopts a window dielectric rod to compensate the coupling between the waveguide resonators, and connects all the dielectric rods of the coupling window into one body, and drives the whole waveguide through a micro motor. The bandwidth of the filter changes.
实施例1Example 1
如图1所示,本实施例1的可调带宽的波导滤波器包括腔体1、谐振腔2、耦合窗3、调谐螺钉4、第一介质棒5、第一驱动装置以及信号输入端8和信号输出端9,所述腔体1的顶面具有开口,其余侧面均为封闭,用一盖板(图中未示出)盖合于腔体1的顶面,组成封闭的空腔。空腔内形成至少两个谐振腔2,具体为波导腔结构,图中示出三个谐振腔2结构,实际中,谐振腔2可以是圆形腔,也可以是矩形腔。相邻两个谐振腔2之间、输入端8与与输入端8相连的谐振腔2之间及输出端9与与输出端9相连的谐振腔2之间形成耦合窗3,至少形成三个耦合窗3,具体为波导耦合窗结构,图中示出四个耦合窗3结构。As shown in FIG. 1, the adjustable bandwidth waveguide filter of the first embodiment includes a cavity 1, a resonant cavity 2, a coupling window 3, a tuning screw 4, a first dielectric rod 5, a first driving device, and a signal input terminal 8. And the signal output end 9, the top surface of the cavity 1 has an opening, and the other sides are closed, and a cover plate (not shown) is attached to the top surface of the cavity 1 to form a closed cavity. At least two resonant cavities 2 are formed in the cavity, specifically a waveguide cavity structure, and three resonant cavity 2 structures are shown in the figure. In practice, the resonant cavity 2 may be a circular cavity or a rectangular cavity. A coupling window 3 is formed between two adjacent resonant cavities 2, between the input end 8 and the resonant cavity 2 connected to the input end 8, and between the output end 9 and the resonant cavity 2 connected to the output end 9, forming at least three The coupling window 3, in particular the waveguide coupling window structure, shows four coupling window 3 structures.
每一个谐振腔2内和每一个耦合窗3内均设有调谐螺钉4,且每一个耦合窗3内设置有若干延伸入耦合窗3内起调节带宽作用的第一介质棒5,第一介质棒4用于通过伸入耦合窗3长度的变化实现带宽的微调或微扰。Each of the resonant cavity 2 and each of the coupling windows 3 is provided with a tuning screw 4, and each of the coupling windows 3 is provided with a plurality of first dielectric rods 5 extending into the coupling window 3 to adjust the bandwidth, the first medium The rod 4 is used to achieve fine-tuning or perturbation of the bandwidth by varying the length of the coupling window 3.
第一驱动装置通过一个驱动电机驱动多个第一介质棒5,与传统的每个耦合窗3都必须配一个驱动电机相比,本实用新型驱动电机使用数量明显减小,成本显著降低。The first driving device drives the plurality of first dielectric rods 5 through a driving motor. Compared with the conventional driving window 3, the driving motor of the present invention is significantly reduced in number and the cost is significantly reduced.
该可调带宽的波导滤波器工作时,信号由波导输入端8进入,依次通过三个谐振腔2后,滤除了带外除谐振腔2谐振频率外的无用频率分量后,带内有用信号由波导输出端9离开。当需要调整改变有用带宽时,通过电机旋转牵引,带动第一介质棒5改变了其进入耦合窗3的长度,从而微扰 改变了四个耦合窗3的带宽,输出端9的有用信号通带随之改变,从而实现了波导滤波器带宽的可调。When the adjustable bandwidth waveguide filter is in operation, the signal enters from the waveguide input terminal 8, passes through the three resonant cavities 2 in sequence, and filters out the unwanted frequency components outside the resonant frequency of the resonant cavity 2, and the useful signal in the band is The waveguide output 9 leaves. When it is necessary to adjust and change the useful bandwidth, the first dielectric rod 5 is changed by the rotation of the motor to change its length into the coupling window 3, so that the perturbation changes the bandwidth of the four coupling windows 3, and the useful signal passband of the output terminal 9 It changes accordingly, thereby realizing the adjustable bandwidth of the waveguide filter.
具体地说,所述第一驱动装置包括第一电机6和第一传动机构7,所述第一传动机构7包括第一驱动丝杆71、第一从动丝杆72和第一滑杆73,所述第一驱动丝杆71外表面为螺纹结构,所述第一驱动丝杆71与所述第一电机6的输出轴轴向连接,所述第一驱动丝杆71在所述第一电机6的驱动下转动,所述第一从动丝杆72与所述第一驱动丝杆71平行设置,所述第一滑杆73为杆状结构,其靠近所述第一驱动丝杆71的一端设置有螺纹孔,使其与所述第一驱动丝杆71螺纹连接,其另一端套设在所述第一从动丝杆72的外侧,并与所述第一从动丝杆72滑动连接。这样第一电机6工作时,带动所述第一驱动丝杆71转动,所述第一滑杆73沿所述第一驱动丝杆71和第一从动丝杆72上下移动。Specifically, the first driving device includes a first motor 6 and a first transmission mechanism 7, and the first transmission mechanism 7 includes a first driving screw 71, a first driven screw 72, and a first sliding rod 73. The outer surface of the first driving screw 71 is a threaded structure, the first driving screw 71 is axially connected to the output shaft of the first motor 6, and the first driving screw 71 is at the first Rotating under the driving of the motor 6, the first driven screw 72 is disposed in parallel with the first driving screw 71, and the first sliding rod 73 is a rod-shaped structure adjacent to the first driving screw 71 One end is provided with a threaded hole to be screwed to the first driving screw 71, and the other end is sleeved on the outer side of the first driven screw 72, and the first driven screw 72 is Slide the connection. Thus, when the first motor 6 is in operation, the first driving screw 71 is rotated, and the first sliding rod 73 moves up and down along the first driving screw 71 and the first driven screw 72.
所述第一介质棒5一端连接所述第一滑杆73,其另一端穿过腔体侧壁上的过孔,并延伸入相应的耦合窗3内,形成一种介质微扰结构,需要说明的是,所述过孔形成于所述腔体1靠近所述第一传动机构7的一侧,过孔的直径可以确保所述第一介质棒5可沿着其轴向方向自由移动,其数量与所述第一介质棒5的数量一致。实施例1中,采用第一介质棒5与其对应的所述调谐螺钉4垂直放置,当然,作为可选地,第一介质棒5与调谐螺钉4也可以形成接近垂直的角度放置。而介质材料的选取也同样遵循了以上的综合原则,以便在较大带宽范围调节时,不严重影响滤波器插入损耗。One end of the first dielectric rod 5 is connected to the first sliding rod 73, and the other end thereof passes through a through hole in the sidewall of the cavity and extends into the corresponding coupling window 3 to form a medium perturbation structure. It is noted that the through hole is formed on a side of the cavity 1 adjacent to the first transmission mechanism 7, and the diameter of the through hole can ensure that the first dielectric rod 5 can move freely along its axial direction. The number is identical to the number of the first dielectric rods 5. In Embodiment 1, the first dielectric rod 5 is placed perpendicularly to its corresponding tuning screw 4, and of course, the first dielectric rod 5 and the tuning screw 4 may alternatively be placed at a nearly vertical angle. The selection of the dielectric material also follows the above comprehensive principle, so that the filter insertion loss is not seriously affected when the bandwidth is adjusted over a large bandwidth.
本实施例1中,所有第一介质棒5都与所述第一驱动装置(具体与第一滑杆73)连接,实现滤波器通带整体平移;作为可选地,也可以是第一电机6驱动部分第一介质棒5,其它第一介质棒5由附加的电机驱动。In the first embodiment, all the first dielectric rods 5 are connected to the first driving device (specifically, the first sliding rod 73), so as to realize the overall translation of the filter passband; alternatively, the first motor may also be used. 6 drives a portion of the first dielectric rod 5, and the other first dielectric rods 5 are driven by an additional motor.
本实施例1通过驱动马达带动驱动丝杆旋转一定角度,套在螺杆上的第一介质棒5将同时深入相应的耦合窗3内一定长度,可调波导滤波器的带宽。In the first embodiment, the driving screw is driven to rotate by a certain angle, and the first dielectric rod 5 sleeved on the screw will penetrate into the corresponding coupling window 3 for a certain length at the same time, and the bandwidth of the waveguide filter can be adjusted.
实施例2Example 2
如图2所示,与上述实施例1方案不同的是,本实施例2的可调带宽的波导滤波器还包括若干延伸入谐振腔内起调频作用的第二介质棒10,每一个谐振腔2内设置所述第二介质棒10,第二介质棒10用于通过伸入谐振腔2长度的变化实现谐振频率的微调或微扰。As shown in FIG. 2, the waveguide of the adjustable bandwidth of the second embodiment further includes a plurality of second dielectric rods 10 extending into the resonant cavity for frequency modulation, each of the resonant cavities. The second dielectric rod 10 is disposed within the second dielectric rod 10 for achieving fine tuning or perturbation of the resonant frequency by variations in the length of the resonant cavity 2.
本实施例2中,第二介质棒10与第一介质棒5共用一个驱动装置,即同样由第一驱动装置驱动,第一驱动装置通过一个驱动电机61驱动多个第一介质棒5和第二介质棒10,与传统的每个谐振腔2和每个耦合窗3都必须配一个驱动电机相比,本实用新型驱动电机使用数量明显减小,成本显著降低。In the second embodiment, the second dielectric rod 10 shares a driving device with the first dielectric rod 5, that is, is also driven by the first driving device, and the first driving device drives the plurality of first dielectric rods 5 and the first by a driving motor 61. The two dielectric rods 10 have significantly reduced the number of driving motors used in the present invention, and each of the conventional resonant cavities 2 and each of the coupling windows 3 must be equipped with one driving motor, and the cost is significantly reduced.
第二介质棒10一端连接所述第一滑杆73,其另一端穿过腔体侧壁上的过孔,并延伸入相应的谐振腔2内,形成一种介质微扰结构,需要说明的是,所述过孔同样形成于所述腔体1靠近所述第一传动机构7的一侧,过孔的直径可以确保所述第二介质棒10可沿着其轴向方向自由移动,其数量与所述第二介质棒10的数量一致。综合考虑谐振器Q值的改变和频率可调谐范围的大小,以及结构可行性,本方案采用第二介质棒10与其对应的所述调谐螺钉3垂直放置,当然,作为可选地,第二介质棒10与调谐螺钉3也可以形成接近垂直的角度放置。而介质材料的选取也同样遵循了以上的综合原则,以便在较大频率范围调谐时,谐振腔Q值有限下降,不严重影响滤波器插入损耗。One end of the second dielectric rod 10 is connected to the first sliding rod 73, and the other end thereof passes through a through hole in the sidewall of the cavity and extends into the corresponding resonant cavity 2 to form a medium perturbation structure, which needs to be explained. Yes, the via hole is also formed on a side of the cavity 1 near the first transmission mechanism 7, and the diameter of the via hole can ensure that the second dielectric rod 10 can move freely along its axial direction, The number is identical to the number of the second dielectric rods 10. Considering the change of the Q value of the resonator and the size of the frequency tunable range, and the structural feasibility, the solution uses the second dielectric rod 10 to be placed perpendicular to the corresponding tuning screw 3, of course, as an optional second medium. The rod 10 and the tuning screw 3 can also be placed at a nearly vertical angle. The selection of dielectric materials also follows the above comprehensive principle, so that when tuning in a large frequency range, the Q value of the resonant cavity is limitedly reduced, and the insertion loss of the filter is not seriously affected.
本实施例2中,所有第一介质棒5和所有第二介质棒10都与所述第一驱动装置(具体与第一滑杆73)连接,实现滤波器通带整体平移;作为可 选地,也可以是第一电机6驱动部分第一和/或第二介质棒,其它介质棒由附加的电机驱动。In the second embodiment, all the first dielectric rods 5 and all the second dielectric rods 10 are connected to the first driving device (specifically, the first sliding rod 73) to realize the overall translation of the filter passband; It is also possible that the first motor 6 drives a portion of the first and/or second dielectric rods, and the other dielectric rods are driven by an additional motor.
本实施例2通过驱动马达带动驱动丝杆旋转一定角度,套在螺杆上的第一介质棒5将同时深入相应的耦合窗3内一定长度,,可调波导滤波器的带宽;且第二介质棒10将同时深入相应的谐振腔2内一定长度,可调波导滤波器的谐振频率随之降低到特定某频率点。In the second embodiment, the driving motor drives the driving screw to rotate at a certain angle, and the first dielectric rod 5 sleeved on the screw will penetrate into the corresponding coupling window 3 for a certain length at the same time, and the bandwidth of the tunable waveguide filter; and the second medium The rod 10 will simultaneously penetrate into the corresponding cavity 2 for a certain length, and the resonant frequency of the tunable waveguide filter will be reduced to a certain frequency point.
实施例3Example 3
如图3所示,与上述实施例2方案不同的是,本实施例3的第二介质棒10由另一第二驱动装置驱动,即由两个驱动装置分别对第一介质棒5和第二介质棒10驱动。As shown in FIG. 3, different from the above embodiment 2, the second dielectric rod 10 of the third embodiment is driven by another second driving device, that is, the two dielectric devices respectively correspond to the first dielectric rod 5 and the Two dielectric rods 10 are driven.
第二驱动装置的结构与第一驱动装置的结构相同,均包括第二电机11和第二传动机构12,所述第二传动机构12包括第二驱动丝杆121、第二从动丝杆122和第二滑杆123,所述第二驱动丝杆121外表面为螺纹结构,所述第二驱动丝杆121与所述第二电机11的输出轴轴向连接,所述第二驱动丝杆121在所述第二电机11的驱动下转动,所述第二从动丝杆122与所述第二驱动丝杆121平行设置,所述第二滑杆123为杆状结构,其靠近所述第二驱动丝杆121的一端设置有螺纹孔,使其与所述第二驱动丝杆121螺纹连接,其另一端套设在所述第二从动丝杆122的外侧,并与所述第二从动丝杆122滑动连接。这样第二电机11工作时,带动所述第二驱动丝杆121转动,所述第二滑杆123沿所述第二驱动丝杆121和第二从动丝杆122上下移动。第二介质棒10一端连接所述第二滑杆123,其另一端穿过腔体侧壁上的过孔,并延伸入相应的谐振腔2内,形成一种介质微扰结构。The structure of the second driving device is the same as that of the first driving device, and includes a second motor 11 and a second transmission mechanism 12, and the second transmission mechanism 12 includes a second driving screw 121 and a second driven screw 122. And the second sliding rod 123, the outer surface of the second driving screw 121 is a threaded structure, and the second driving screw 121 is axially connected to the output shaft of the second motor 11, the second driving screw 121 is rotated by the second motor 11, the second driven screw 122 is disposed in parallel with the second driving screw 121, and the second sliding rod 123 is a rod-shaped structure, which is close to the One end of the second driving screw 121 is provided with a threaded hole to be screwed to the second driving screw 121, and the other end of the second driving screw 121 is sleeved on the outer side of the second driven screw 122, and the first The second driven screw 122 is slidably connected. Thus, when the second motor 11 is in operation, the second driving screw 121 is rotated, and the second sliding rod 123 is moved up and down along the second driving screw 121 and the second driven screw 122. The second dielectric rod 10 is connected at one end to the second sliding rod 123, and the other end thereof passes through a through hole in the sidewall of the cavity and extends into the corresponding resonant cavity 2 to form a dielectric perturbation structure.
本实施例3中,所有第一介质棒5都与所述第一驱动装置(具体与第一滑杆73)连接,所有第二介质棒10都与所述第二驱动装置(具体与第二滑杆123)连接,实现滤波器通带整体平移;作为可选地,也可以是第一电机6驱动部分第一介质棒5,其它第一介质棒5由附加的电机驱动, 同理,第二电机11驱动部分第二介质棒10,其它第二介质棒10由附加的电机驱动。In the third embodiment, all the first dielectric rods 5 are connected to the first driving device (specifically, the first sliding rod 73), and all the second dielectric rods 10 are connected to the second driving device (specifically and secondly). The sliding rod 123) is connected to realize the overall translation of the filter passband; alternatively, the first motor 6 may drive a portion of the first dielectric rod 5, and the other first dielectric rods 5 are driven by an additional motor, similarly, The second motor 11 drives a portion of the second dielectric rod 10, and the other second dielectric rods 10 are driven by an additional motor.
本实施例3通过两个驱动马达带动各自的驱动丝杆旋转一定角度,一个驱动马达驱动套在第一驱动丝杆71上的第一介质棒5将同时深入相应的耦合窗内一定长度,可调波导滤波器的带宽;另一个驱动马达驱动套在第二驱动丝杆121上的第二介质棒10将同时深入相应的谐振腔2内一定长度,可调波导滤波器的频率。In the third embodiment, the two driving motors are driven to rotate the respective driving screws by a certain angle, and a driving motor drives the first dielectric rod 5 sleeved on the first driving screw 71 to penetrate into the corresponding coupling window to a certain length at the same time. The bandwidth of the waveguide filter is adjusted; another driving medium drives the second dielectric rod 10 sleeved on the second driving screw 121 to simultaneously penetrate into the corresponding cavity 2 for a certain length, tunable the frequency of the waveguide filter.
本实用新型由于去除了大部分高精度微电机,只留下一个或两个微电机,显著降低了成本,在抑制要求日益严酷,谐振腔数量增多的今天,应用更具优势,可靠性更高;另外由于介质棒的可调行程显著大于传统调镙的行程,对电机的精度要求显著降低;再有,由于用介质棒调整带宽,不会因接触面不紧密而造成互调恶化。Since the utility model removes most of the high-precision micro-motors, leaving only one or two micro-motors, the cost is significantly reduced, and the application is more advantageous and the reliability is higher in today's increasingly severe suppression requirements and an increase in the number of resonant cavities. In addition, since the adjustable stroke of the dielectric rod is significantly larger than the stroke of the conventional tuning, the accuracy requirement of the motor is significantly reduced; furthermore, since the bandwidth is adjusted by the dielectric rod, the intermodulation is not deteriorated due to the tight contact surface.
本实用新型的技术内容及技术特征已揭示如上,然而熟悉本领域的技术人员仍可能基于本实用新型的教示及揭示而作种种不背离本实用新型精神的替换及修饰,因此,本实用新型保护范围应不限于实施例所揭示的内容,而应包括各种不背离本实用新型的替换及修饰,并为本专利申请权利要求所涵盖。The technical content and the technical features of the present invention have been disclosed as above. However, those skilled in the art can still make various substitutions and modifications without departing from the spirit of the present invention based on the teachings and disclosures of the present invention. Therefore, the present invention protects the present invention. The scope of the invention is not limited by the scope of the invention, and the invention is intended to cover various alternatives and modifications without departing from the invention.

Claims (10)

  1. 一种可调带宽的波导滤波器,包括腔体,设置在所述腔体上的输入端、输出端,以及至少三个耦合窗,所述耦合窗形成于相邻两个谐振腔之间、所述输入端与与所述输入端相连的谐振腔之间及所述输出端与与所述输出端相连的谐振腔之间,其特征在于,所述可调带宽的波导滤波器还包括若干延伸入耦合窗内起调节带宽作用的第一介质棒,所述第一介质棒伸入所述耦合窗内的长度可调,且至少三个所述第一介质棒由第一驱动装置驱动。An adjustable bandwidth waveguide filter includes a cavity, an input end, an output end, and at least three coupling windows disposed on the cavity, the coupling window being formed between two adjacent resonant cavities, The input end is connected between the resonant cavity connected to the input end and the output end and the resonant cavity connected to the output end, wherein the adjustable bandwidth waveguide filter further comprises a plurality of A first dielectric rod extending into the coupling window to adjust the bandwidth, the length of the first dielectric rod extending into the coupling window is adjustable, and at least three of the first dielectric rods are driven by the first driving device.
  2. 根据权利要求1所述的可调带宽的波导滤波器,其特征在于,所述可调带宽的波导滤波器还包括若干延伸入谐振腔内起调频作用的第二介质棒,所述第二介质棒伸入所述谐振腔内的长度可调,至少两个所述第二介质棒由所述第一驱动装置驱动,或由第二驱动装置驱动。The adjustable bandwidth waveguide filter according to claim 1, wherein the adjustable bandwidth waveguide filter further comprises a plurality of second dielectric rods extending into the resonant cavity for frequency modulation, the second medium The length of the rod extending into the cavity is adjustable, and at least two of the second dielectric rods are driven by the first drive or by a second drive.
  3. 根据权利要求2所述的可调带宽的波导滤波器,其特征在于,所述第一和第二驱动装置均包括电机和传动机构,所述电机带动所述传动机构运动,所述第一介质棒和第二介质棒均与第一驱动装置的传动机构相连;或者第一介质棒与第一驱动装置的传动机构相连,第二介质棒与第二驱动装置的传动机构相连。The adjustable bandwidth waveguide filter according to claim 2, wherein said first and second driving means each comprise a motor and a transmission mechanism, said motor driving said transmission mechanism to move said first medium Both the rod and the second dielectric rod are connected to the transmission mechanism of the first driving device; or the first dielectric rod is connected to the transmission mechanism of the first driving device, and the second dielectric rod is connected to the transmission mechanism of the second driving device.
  4. 根据权利要求3所述的可调带宽的波导滤波器,其特征在于,所述传动机构包括驱动丝杆和滑杆,所述驱动丝杆在所述电机的驱动下转动,所述滑杆与所述驱动丝杆螺纹连接,所述滑杆沿着所述驱动丝杆移动,所述第一介质棒和第二介质棒均与第一驱动装置的滑杆相连;或者第一介质棒与第一驱动装置的滑杆相连,第二介质棒与第二驱动装置的滑杆相连。The adjustable bandwidth waveguide filter according to claim 3, wherein said transmission mechanism comprises a drive screw and a slide rod, said drive screw being driven by said motor, said slide rod and The driving screw is screwed, the sliding rod moves along the driving screw, and the first dielectric rod and the second dielectric rod are both connected to the sliding rod of the first driving device; or the first dielectric rod and the first A sliding rod of a driving device is connected, and a second dielectric rod is connected to the sliding rod of the second driving device.
  5. 根据权利要求4所述的可调带宽的波导滤波器,其特征在于,所述传动机构还包括从动丝杆,所述从动丝杆与所述驱动丝杆平行设置,所述滑杆套装在所述从动丝杆上,并沿所述从动丝杆滑动。The adjustable bandwidth waveguide filter according to claim 4, wherein the transmission mechanism further comprises a driven screw, the driven screw is disposed in parallel with the driving screw, and the sliding rod set On the driven screw and sliding along the driven screw.
  6. 根据权利要求3所述的可调带宽的波导滤波器,其特征在于,所述腔 体在靠近所述传动机构一侧的腔体壁上形成有与第一介质棒数量一致或与第一介质棒和第二介质棒数量之和一致的过孔,所述第一介质棒由所述过孔延伸到对应的耦合窗内,所述第二介质棒由所述过孔延伸到对应的谐振腔内。The adjustable bandwidth waveguide filter according to claim 3, wherein the cavity is formed on the wall of the cavity near the side of the transmission mechanism to have the same number of first dielectric bars or the first medium. a via having a sum of the number of bars and a second dielectric rod extending from the via into a corresponding coupling window, the second dielectric rod extending from the via to a corresponding resonant cavity Inside.
  7. 根据权利要求1所述的可调带宽的波导滤波器,其特征在于,所述可调带宽的波导滤波器还包括延伸入所述耦合窗和所述谐振腔内的调谐螺钉,所述第一介质棒和第二介质棒与对应的所述调谐螺钉垂直设置。The adjustable bandwidth waveguide filter of claim 1 wherein said adjustable bandwidth waveguide filter further comprises a tuning screw extending into said coupling window and said resonant cavity, said first The dielectric rod and the second dielectric rod are disposed perpendicular to the corresponding tuning screw.
  8. 根据权利要求2所述的可调带宽的波导滤波器,其特征在于,所有所述第一介质棒和第二介质棒均由所述第一驱动装置驱动,或者所有所述第一介质棒均由所述第一驱动装置驱动,所有所述第二介质棒均由所述第二驱动装置驱动。The adjustable bandwidth waveguide filter according to claim 2, wherein all of said first dielectric rod and said second dielectric rod are driven by said first driving means, or all of said first dielectric rods Driven by the first drive means, all of the second dielectric rods are driven by the second drive means.
  9. 根据权利要求1所述的可调带宽的波导滤波器,其特征在于,所述谐振腔为波导腔,所述耦合窗为波导耦合窗。The adjustable bandwidth waveguide filter of claim 1 wherein said resonant cavity is a waveguide cavity and said coupling window is a waveguide coupling window.
  10. 根据权利要求1所述的可调带宽的波导滤波器,其特征在于,所述第一介质棒和第二介质棒沿着各自的轴向方向伸缩运动。The variable bandwidth waveguide filter of claim 1 wherein said first dielectric rod and said second dielectric rod telescopically move in respective axial directions.
PCT/CN2018/110560 2017-12-05 2018-10-17 Waveguide filter having adjustable bandwidth WO2019109735A1 (en)

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