CN101436697A - TM010 module low loss high selectivity cavity filter - Google Patents
TM010 module low loss high selectivity cavity filter Download PDFInfo
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- CN101436697A CN101436697A CNA2007101352173A CN200710135217A CN101436697A CN 101436697 A CN101436697 A CN 101436697A CN A2007101352173 A CNA2007101352173 A CN A2007101352173A CN 200710135217 A CN200710135217 A CN 200710135217A CN 101436697 A CN101436697 A CN 101436697A
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- high selectivity
- low loss
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Abstract
The invention discloses a TM010 mode low-loss high-selectivity cavity filter, which comprises a metal main body, a cover plate, resonant frequency adjustment screws, an inter-cavity coupling strength adjustment screw, and input/output interfaces, wherein the inside of the main body is at least provided with two cylindrical cavity resonators, the cavity resonators are numbered according to the sequence, a centralized coupling window is arranged between the two cavity resonators with adjacent serial numbers, the resonant frequency adjustment screws and the inter-cavity coupling strength adjustment screw are fixed on the cover plate and extend into the cylindrical cavity resonators and the centralized coupling window respectively, and the input/output interfaces are connected with the head and tail cavity resonators respectively. The filter adopts cylindrical waveguide cavity technology to ensure that the electromagnetic field is entirely centralized in a closed conductor to propagate, thereby obtaining a high Q value and realizing low loss; and the filter has a smart structure, has various novel approaches of inter-cavity coupling, and is convenient for trans-cavity coupling, thereby improving the selectivity of the filter.
Description
Technical field
The present invention relates to a kind of TM
010Module low loss high selectivity cavity filter is applicable to the filtering device of radio communication field radio signal transmission.
Background technology
In all kinds of Wireless Telecom Equipments of modern times, filter is being brought into play more and more important effect as commonly used, indispensable, widely used parts in the wireless messages transmission technology.At present, the microwave filter that is applied in all kinds of wireless communication frequency bands generally adopts the coaxial line transmission means to realize, it is usually by resonant cavity, composition such as inner wire and corresponding tuning screw, it can't taken into account aspect low-loss and the high selectivity, and in performance index requirement low-loss and powerful while, the volume of resonant cavity will correspondingly increase, this not only can consume great deal of raw materials, also it is made and processing technology proposition higher requirement, the realization of product temperature stability is also comparatively difficult, is difficult to adapt to current high target, require cheaply and the reality of market keen competition.
Summary of the invention
Problem to be solved by this invention is, overcomes the problem that existing filter can't be taken into account in low-loss and high selectivity, and a kind of TM of novel structure is provided
010Module low loss high selectivity cavity filter.
The technical solution adopted for the present invention to solve the technical problems is as follows: TM
010Module low loss high selectivity cavity filter, comprise a metal master, cover plate, the resonance frequency adjustment screw, stiffness of coupling adjustment screw between the chamber, and input/output interface, it is characterized in that: have two cylindrical cavity resonant cavitys in the described main body at least, described cavity resonance chamber serial number, number between two adjacent resonant cavitys and have centralized coupling window, described resonance frequency adjustment screw, the stiffness of coupling adjustment screw is fixing on the cover board between the chamber, and stretch into the cavity resonance chamber respectively, in the centralized coupling window, input, output interface respectively with head, tail cavity resonance chamber links to each other.
Further aspect of the present invention is: be separated with mutually and have open circuit separate space coupling device between the cavity resonance chamber in two or four cavity resonance chambeies.
Beneficial effect of the present invention is as follows: the present invention has adopted cylindrical waveguide cavity technology, electromagnetic field is all concentrated in the sealing conductor to be propagated, thereby obtain high Q value (generally more than 10000), improved the insertion loss objective of product, the ingenious structure of designed main body section bar, make cavity configuration can be divided into some adjacent same sections, the centre has only corresponding partition wall to separate, has the new way that is coupled between multiple chamber, be convenient to carry out the separate space coupling, thereby can improve the selection index of filter to a great extent, therefore, filter of the present invention has been taken into account the requirement of low-loss and high selectivity; Metal cylinder resonator mode of resonance of the present invention is TM
010Mould, TM
010The pattern field structure is simple, and magnetic field has only along the circumferential direction component (magnetic line of force is the annulus in the cross section), and electric field is strong and direction no change along cylinder axis direction place, electromagnetic field distribution axial symmetry and being evenly distributed; Since the cylindrical cavity resonance frequency only by circular diameter decision and with highly irrelevant characteristic, can reduce the height of resonant cavity effectively, make filter of the present invention with generally use the filter of coaxial line TEM mode transfer mode to compare at present, have advantages such as quality factor height, loss is little, power capacity is big; This performance of filter is superior, the reliability height, of many uses, can design serial multicavity filter, with its serve as the basis can design S, C, X, Ku wave band serial duplexer, close road splitter or the like, of many uses, for the wireless communication technology of S, C, X, Ku wave band provides a kind of ideal kernel filter device; Filter construction is simple, compact, ingenious; its main body can be by ripe aluminum extrusion process one-shot forming; processing technology is simplified; consumptive material is few; good product consistency, the production efficiency height, cost is low; and can require to design corresponding mould according to the different frequency range of filter, realize the large-scale production of product.
Description of drawings
Fig. 1 is TM of the present invention
010Module low loss high selectivity cavity filter master TV structure figure.
Fig. 2 is TM of the present invention
010The module low loss high selectivity cavity filter master looks the sectional structure schematic diagram.
Fig. 3 is TM of the present invention
010Module low loss high selectivity cavity filter backsight structural representation.
Fig. 4 is the schematic diagram of D direction among Fig. 2.
Fig. 5 is TM of the present invention
010The module low loss high selectivity cavity filter master looks the sectional structure schematic diagram.
Number in the figure is schematically as follows: 1-main body, 2-cover plate, 21-upper cover plate, the 22-lower cover, 3-cavity resonance chamber, the first cavity resonance of 32-chamber, 33-tail cavity resonance chamber, 31-resonance frequency adjustment screw, 311-resonance frequency adjustment screw, 312-resonance frequency adjustment screw, the centralized coupling window of 4-, stiffness of coupling adjustment screw between the 41-chamber, the 51-input/output interface, the 52-input/output interface, 6-open circuit separate space coupling device, 61-feedback window adjustment screw, 62-feed back groove.
Embodiment
With reference to the accompanying drawings and in conjunction with the embodiments the present invention is described in further detail.But the invention is not restricted to given example.
As Fig. 1, Fig. 2, shown in Figure 3, TM of the present invention
010Module low loss high selectivity cavity filter, comprise a metal master 1, cover plate 2 (can be divided into upper cover plate 21, lower cover 22), resonance frequency adjustment screw 31, stiffness of coupling adjustment screw 41 between the chamber, and input/output interface 51,52, at least (quantity of present embodiment cavity resonant cavity is 6 to have two cylindrical cavity resonant cavitys in the main body 1, be divided into 2 rows parallel to each other, the minimum number in cavity resonance chamber is 2 and can realizes function in theory), cavity resonance chamber serial number, be numbered A1, A2, ... A6, number between two adjacent resonant cavitys and have centralized coupling window, as having centralized coupling window 4 between A4 and the A5, resonance frequency adjustment screw 31, stiffness of coupling adjustment screw 41 is fixed on the cover plate 2 between the chamber, and stretch into cavity resonance chamber 3 respectively, in the centralized coupling window 4, input, output interface 51,52 respectively with head, tail cavity resonance chamber 32,33 link to each other.
In order to improve the selectivity of filter, as Fig. 1, Fig. 2, shown in Figure 4, be separated with mutually that (between A2, the A5) has open circuit separate space coupling device 6 between the cavity resonance chamber in two cavity resonance chambeies, this open circuit separate space coupling device is bilateral inhibition type open circuit separate space coupling device, it has feedback groove 62 that is communicated with between the described cavity resonance chamber (A2, A5) that is separated with two cavity resonance chambeies mutually and the feedback window adjustment screw 61 that matches with this feedback groove, adjustment screw 61 is fixed on the cover plate 2, and its lower end is stretched in the feedback groove 62.Open circuit separate space coupling device also can adopt the open circuit separate space coupling device of another kind of bilateral inhibition type, and as shown in Figure 5, label 6 is capacitive based open circuit separate space coupling device, and other label signals among Fig. 2 are referring to Fig. 2.The present invention also can be provided with open circuit separate space coupling device (signal of not drawing) between the cavity resonance chamber in four cavity resonance chambeies that is separated by, open circuit separate space coupling device promptly is set between A1 and A6, and between A2 and the A5, A1 and A6 are provided with open circuit separate space coupling device.
In order to improve the performance of filter, and be convenient to debugging, in the present embodiment, resonance frequency adjustment screw 31 is corresponding with the center in cavity resonance chamber 3; Same, stiffness of coupling adjustment screw 41 is corresponding with the center of centralized coupling window 4 between the chamber.As shown in Figure 1, in the present embodiment, input, output interface 51,52 are fixed on the cover plate 2, and corresponding with the center in initial and end cavity resonance chamber 32,33 respectively.As Fig. 1, Fig. 2, shown in Figure 3, described 6 resonance frequency adjustment screw are separately fixed on the upper and lower cover plate, specifically, the resonance frequency adjustment screw 311,312 corresponding with initial and end cavity resonance chamber 32,33 is fixed on the lower cover 22, remaining four resonance frequency adjustment screw is fixed on the upper cover plate 21, and the input/output interface 51,52 corresponding with initial and end cavity resonance chamber 32,33 is fixed on the upper cover plate 21.Resonance frequency adjustment screw, the fixing position of input/output interface can be selected as required, 6 resonance frequency adjustment screw and input/output interface can be fixed on the same cover plate, also can not be fixed on the same cover plate, be fixed on the cover plate as 5 resonance frequency adjustment screw, another resonance frequency adjustment screw is fixed on another piece cover plate, and input/output interface also can be arranged with the need.In order to reach better signal feedback effect, to improve selectivity, the cavity resonance chamber can be convenient to realize signal feedback, and production technology be simple by the serpentine sequence arrangement.
In the present embodiment, be that example is elaborated with the filter with 6 cavity resonance chambeies only, in fact, the present invention can also be four chambeies, eight chambeies, nine chambeies, 12 chambeies etc., but the dicelous multicavity filter of tool at least.
Claims (10)
1, TM
010Module low loss high selectivity cavity filter, comprise a metal master, cover plate, the resonance frequency adjustment screw, stiffness of coupling adjustment screw between the chamber, and input/output interface, it is characterized in that: have two cylindrical cavity resonant cavitys in the described main body at least, described cavity resonance chamber serial number, number between two adjacent resonant cavitys and have centralized coupling window, described resonance frequency adjustment screw, the stiffness of coupling adjustment screw is fixing on the cover board between the chamber, and stretch into the cavity resonance chamber respectively, in the centralized coupling window, input, output interface respectively with head, tail cavity resonance chamber links to each other.
2, TM according to claim 1
010Module low loss high selectivity cavity filter is characterized in that being separated with mutually between the cavity resonance chamber in two cavity resonance chambeies and has open circuit separate space coupling device.
3, TM according to claim 1 and 2
010Module low loss high selectivity cavity filter is characterized in that being separated with mutually between the cavity resonance chamber in four cavity resonance chambeies and has open circuit separate space coupling device.
4, TM according to claim 2
010Module low loss high selectivity cavity filter, it is characterized in that described open circuit separate space coupling device is bilateral inhibition type open circuit separate space coupling device, it has feedback groove that is communicated with between the described cavity resonance chamber that is separated with two cavity resonance chambeies mutually and the adjustment screw that matches with this feedback groove, described adjustment screw is fixing on the cover board, and its lower end is stretched in the feedback groove.
5, TM according to claim 3
010Module low loss high selectivity cavity filter, it is characterized in that the open circuit separate space coupling device between the described cavity resonance chamber that is separated with four cavity resonance chambeies mutually, have feedback groove that is communicated with between the described cavity resonance chamber that is separated with four cavity resonance chambeies mutually and the adjustment screw that matches with this feedback groove, described adjustment screw is fixing on the cover board, and its lower end is stretched in the feedback groove.
6, TM according to claim 1
010Module low loss high selectivity cavity filter is characterized in that described resonance frequency adjustment screw is corresponding with the center in cavity resonance chamber.
7, TM according to claim 1
010Module low loss high selectivity cavity filter is characterized in that the stiffness of coupling adjustment screw is corresponding with the center of centralized coupling window between the chamber.
8, TM according to claim 1
010Module low loss high selectivity cavity filter is characterized in that described input, output interface are fixing on the cover board, and corresponding with the center in initial and end cavity resonance chamber respectively.
9, TM according to claim 1
010Module low loss high selectivity cavity filter is characterized in that described cavity resonance chamber is by the serpentine sequence arrangement.
10, according to claim 1 or 2 any described TM
010Module low loss high selectivity cavity filter is characterized in that the quantity in described cavity resonance chamber is 6, is divided into 2 rows parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101352173A CN101436697A (en) | 2007-11-14 | 2007-11-14 | TM010 module low loss high selectivity cavity filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101352173A CN101436697A (en) | 2007-11-14 | 2007-11-14 | TM010 module low loss high selectivity cavity filter |
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| CN101436697A true CN101436697A (en) | 2009-05-20 |
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| CNA2007101352173A Pending CN101436697A (en) | 2007-11-14 | 2007-11-14 | TM010 module low loss high selectivity cavity filter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102724855A (en) * | 2012-05-22 | 2012-10-10 | 宁海县弗莱克斯电气有限公司 | Shielding case of microwave probe |
| CN103117431A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Cavity body high-pass filter |
| CN108054477A (en) * | 2017-10-23 | 2018-05-18 | 四川天邑康和通信股份有限公司 | A kind of miniaturization LTE cavity body filters applied to diversity reception digital optical fiber direct station |
| CN109687069A (en) * | 2018-12-19 | 2019-04-26 | 中国电子科技集团公司第五十四研究所 | A kind of X-band high power circular cavity filter |
-
2007
- 2007-11-14 CN CNA2007101352173A patent/CN101436697A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117431A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Cavity body high-pass filter |
| CN102724855A (en) * | 2012-05-22 | 2012-10-10 | 宁海县弗莱克斯电气有限公司 | Shielding case of microwave probe |
| CN108054477A (en) * | 2017-10-23 | 2018-05-18 | 四川天邑康和通信股份有限公司 | A kind of miniaturization LTE cavity body filters applied to diversity reception digital optical fiber direct station |
| CN109687069A (en) * | 2018-12-19 | 2019-04-26 | 中国电子科技集团公司第五十四研究所 | A kind of X-band high power circular cavity filter |
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Open date: 20090520 |