CN205583105U - Ridge waveguide mode filter that withers and falls - Google Patents
Ridge waveguide mode filter that withers and falls Download PDFInfo
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- CN205583105U CN205583105U CN201620224360.4U CN201620224360U CN205583105U CN 205583105 U CN205583105 U CN 205583105U CN 201620224360 U CN201620224360 U CN 201620224360U CN 205583105 U CN205583105 U CN 205583105U
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Abstract
The utility model discloses a ridge waveguide mode filter that withers and falls. It includes the cavity and sets up the ridge who runs through the cavity in the cavity, and cavity both ends inner space forms two ridge waveguides respectively, and cavity middle part space forms narrow waveguide, the last interval of ridge is equipped with first resonance unit, second resonance unit and third resonance unit, inside second resonance unit was located narrow waveguide, first resonance unit and third resonance unit were located respectively inside the ridge waveguide at narrow waveguide both ends. The utility model discloses the ridge waveguide cooperatees with narrow waveguide, arranges the partial resonance unit in the ridge waveguide, and direct chambeies (first resonance unit, third resonance unit position) from beginning to end shifts out outside the narrow waveguide promptly to strengthen the excitation of its port, provide the excitation of sufficient port with the relative bandwidth by being increased to 26% within 5%, realized that the leap -type of bandwidth increases.
Description
Technical field
This utility model belongs to communication technical field, is specifically related to a kind of ridge waveguide evanescent mode wave filter.
Background technology
The relative bandwidth about 3% of the waveguide filter within 11G itself, and require same to be designed to compatible different waveguide frequency sub-band, these are exactly the different frequency range coverage of 1～2G easily, the suppression design of corresponding far-end also is able to meet different debugging needs, relative bandwidth corresponding thus need to be up to 15% and could meet requirement, and the input/output terminal of existing evanescent mode wave filter is common standard waveguide, the impedance transformation that middle employing is multistage, this structure size in the range of 11G own is bigger, and can only realize about 5% relative bandwidth, this seriously constrains its application in the range of 11G.
Summary of the invention
The purpose of this utility model is contemplated to solve the deficiency that above-mentioned background technology exists, it is provided that the ridge waveguide evanescent mode wave filter that a kind of simple in construction, relative bandwidth are high.
The technical solution adopted in the utility model is: a kind of ridge waveguide evanescent mode wave filter, including cavity be arranged at the vallum of through cavities in cavity, inner space, cavity two ends forms two ridge waveguides respectively, cavity central space forms narrow waveguide, the first resonant element, the second resonant element and the 3rd resonant element it is interval with on described vallum, described second resonant element is positioned at inside narrow waveguide, and the first resonant element and the 3rd resonant element lay respectively at inside the ridge waveguide at narrow waveguide two ends.
Further, the width of described narrow waveguide and height are less than width and the height of ridge waveguide.
Further, described vallum two ends width is less than width in the middle part of vallum, sidewall in the middle part of both sides laminating cavity in the middle part of described vallum.
Further, described first resonant element, the second resonant element and the 3rd resonant element are symmetrical along narrow waveguide core.
Further, described first resonant element, the second resonant element and the 3rd resonant element are the resonant column of rectangle.
Further, the thickness of described second resonant element is more than the first resonant element and the thickness of the 3rd resonant element.
This utility model ridge waveguide matches with narrow waveguide, partial resonance unit is arranged in ridge waveguide, i.e. directly head and the tail chamber (the first resonant element, the 3rd resonant element position) are removed outside narrow waveguide, to strengthen the excitation of its port, relative bandwidth is increased to, within 5%, the port excitation that 26% offer is enough, it is achieved that the great-leap-forward of bandwidth increases.Simultaneously after head and the tail chamber progressively removes narrow waveguide, being placed at width waveguide alternation and played various modes because the discontinuity of structure encourages, these different waveguide modes combinations give the port excitation that wave filter is enough, it is achieved thereby that being substantially improved of bandwidth.
Accompanying drawing explanation
Fig. 1 is planar structure schematic diagram of the present utility model (showing internal structure for convenience, in figure, cavity one side is transparent).
Fig. 2 is A-A profile in Fig. 1.
In figure: 1-cavity；2-vallum；3-ridge waveguide；The narrow waveguide of 4-；5-the first resonant element；6-the second resonant element；7-the 3rd resonant element.
Detailed description of the invention
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, it is simple to be well understood to this utility model, but they do not constitute restriction to this utility model.
As shown in Figure 1-2, this utility model include cavity 1 and be arranged at cavity 1 in the vallum 2 of through cavities, the inner space at cavity 1 two ends 1.1 forms two ridge waveguides 3 respectively, in the middle part of cavity 1, the space in 1.2 forms narrow waveguide 4, the first resonant element the 5, second resonant element 6 and the 3rd resonant element 7 it is interval with on described vallum 2, it is internal that described second resonant element 6 is positioned at narrow waveguide 4, and the ridge waveguide 3 that the first resonant element 5 and the 3rd resonant element 7 lay respectively at narrow waveguide 4 two ends is internal.
This utility model ridge waveguide 3 matches with narrow waveguide 4, partial resonance unit is arranged in ridge waveguide, i.e. directly head and the tail chamber (the first resonant element, the 3rd resonant element position) are removed outside narrow waveguide, to strengthen the excitation of its port, relative bandwidth is increased to, within 5%, the port excitation that 26% offer is enough, it is achieved that the great-leap-forward of bandwidth increases.Simultaneously after head and the tail chamber progressively removes narrow waveguide, being placed at width waveguide alternation and played various modes because the discontinuity of structure encourages, these different waveguide modes combinations give the port excitation that wave filter is enough, it is achieved thereby that being substantially improved of bandwidth.
And compare traditional waveguide filter input and output and be common standard waveguide, in the range of 11G, size own is bigger, add 1/4 multistage impedance transformer, the physical dimension of whole functional module is big, ridge waveguide gateway of the present utility model greatly have compressed whole overall dimensions, whole functional module size only has the half of former scheme, but the relative bandwidth of the most several times is achieved so that the ridge waveguide low pass filter of this form can be applied in the low frequency waveguide duplexer within 11G smoothly.
As shown in Figure 2, the size of ridge waveguide 3 rectangular opening is respectively wa, wb, and the width at vallum 2 two ends 2.1 is w1, height is h1, and these four parameters cooperatively determine the cut-off frequency of ridge waveguide, allowing for waveguide duplexer signal normally to circulate, this parameter is adjusted according to the needs of concrete equipment.The width a of narrow waveguide 4 and height b is respectively less than the width wa and height wb of ridge waveguide 3.
In such scheme, the width at vallum 2 two ends 2.1 is less than the width of 2.2 in the middle part of vallum, 1.2 sidewalls in the middle part of 2.2 both sides laminating cavitys 1 in the middle part of described vallum 2.
In such scheme, first resonant element the 5, second resonant element 6 and the 3rd resonant element 7 are the resonant column of rectangle.Between first resonant element 5 and the second resonant element 6, the spacing of the second resonant element 6 and the 3rd resonant element 7 be l1, i.e. first resonant element the 5, second resonant element 6 and the 3rd resonant element 7 are distributed along narrow waveguide 4 centrosymmetry, by the different resonant element spacing of regulation, the coupling bandwidth of the whole wave filter of adjustable.L2 is the first resonant element 5 and the 3rd resonant element 7 and the distance of narrow waveguide 4 end face, by regulation l2, adjusts port excitation size of wave filter, and then the tap motivation needs of coupling different bandwidth with this.
The height of first resonant element the 5, second resonant element 6 and the 3rd resonant element 7 is h2, wrs1 is the first resonant element 5 and thickness of the 3rd resonant element 7, wrs2 is the thickness of the second resonant element 6, by regulation wrs1, h2, scalable the first resonant element 5 and the frequency of the 3rd resonant element 7；By regulation wrs2, h2, the frequency of scalable the second resonant element 6.The thickness wrs2 of the second resonant element 6 is more than the first resonant element 5 and the thickness wrs1 of the 3rd resonant element 7.
Obviously, those skilled in the art can be to carrying out various change and modification herein without deviating from spirit and scope herein.So, if these amendments herein and modification belong within the scope of this paper claim and equivalent technologies thereof, it is also intended to comprise these the most herein and changes and modification.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (6)
1. a ridge waveguide evanescent mode wave filter, it is characterized in that: the vallum (2) of through cavities in including cavity (1) and being arranged at cavity, cavity (1) inner space, two ends forms two ridge waveguides (3) respectively, cavity (1) central space forms narrow waveguide (4), the first resonant element (5) it is interval with on described vallum (2), second resonant element (6) and the 3rd resonant element (7), it is internal that described second resonant element (6) is positioned at narrow waveguide (4), the ridge waveguide (3) that first resonant element (5) and the 3rd resonant element (7) lay respectively at narrow waveguide two ends is internal.
A kind of ridge waveguide evanescent mode wave filter the most according to claim 1, it is characterised in that: the width of described narrow waveguide (4) and height are respectively less than width and the height of ridge waveguide (3).
A kind of ridge waveguide evanescent mode wave filter the most according to claim 1, it is characterised in that: described vallum two ends width is less than width in the middle part of vallum, sidewall in the middle part of both sides laminating cavity in the middle part of described vallum.
A kind of ridge waveguide evanescent mode wave filter the most according to claim 1, it is characterised in that: described first resonant element (5), the second resonant element (6) and the 3rd resonant element (7) are symmetrical along narrow waveguide core.
A kind of ridge waveguide evanescent mode wave filter the most according to claim 1, it is characterised in that: described first resonant element (5), the second resonant element (6) and the 3rd resonant element (7) are the resonant column of rectangle.
A kind of ridge waveguide evanescent mode wave filter the most according to claim 1, it is characterised in that: the thickness of described second resonant element (6) is more than the first resonant element (5) and the thickness of the 3rd resonant element (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620224360.4U CN205583105U (en) | 2016-03-22 | 2016-03-22 | Ridge waveguide mode filter that withers and falls |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620224360.4U CN205583105U (en) | 2016-03-22 | 2016-03-22 | Ridge waveguide mode filter that withers and falls |
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| CN205583105U true CN205583105U (en) | 2016-09-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539332A (en) * | 2018-05-07 | 2018-09-14 | 成都银赫科技有限公司 | A kind of four work device of compact rectangular waveguide |
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2016
- 2016-03-22 CN CN201620224360.4U patent/CN205583105U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539332A (en) * | 2018-05-07 | 2018-09-14 | 成都银赫科技有限公司 | A kind of four work device of compact rectangular waveguide |
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