CN204156067U - A kind of waveguide high frequency low pass filter - Google Patents
A kind of waveguide high frequency low pass filter Download PDFInfo
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- CN204156067U CN204156067U CN201420513968.XU CN201420513968U CN204156067U CN 204156067 U CN204156067 U CN 204156067U CN 201420513968 U CN201420513968 U CN 201420513968U CN 204156067 U CN204156067 U CN 204156067U
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- partition wall
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- low pass
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Abstract
The utility model relates to a kind of waveguide high frequency low pass filter.It comprises body, and described body is tabular, and its one side has the rectangular channel at through body two ends, the notch of rectangular channel has cover plate, forms waveguide cavity by the cover plate of rectangular channel and rectangular notch.The two ends of described waveguide cavity have input port and output port respectively.Be characterized in there are at least two partition walls in the waveguide cavity between input port and output port, leave spacing between the top of described partition wall and cover plate, described partition wall is arranged along the longitudinal direction of described waveguide cavity and leaves spacing each other.Wherein, the described spacing described in that in the middle of described waveguide cavity spacing to input port and the spacing between output port broaden gradually by narrow.This waveguide high frequency low pass filter, requirement on machining accuracy is not high, not only can be mass, and conforming product rate is high.Be applicable to wireless communication field.
Description
Technical field
The utility model relates to a kind of waveguide high frequency low pass filter.Specifically, be used to suppress the far-end harmonic of electronic system and the high frequency low pass filter of stray wave, be applicable to wireless communication field.
Background technology
All know at wireless communication field, no matter adopt which kind of frequency synthesis mode, all can produce harmonic wave and stray wave in a communications device, the normal work of these harmonic waves and stray wave meeting severe jamming communication equipment after amplifier amplifies.Therefore, just must at the harmonic spectrum energy of radio-frequency front-end filtering communication equipment.
At present, the filter of filtering millimeter waveguide front end harmonic wave is all broadband ridge waveguide low pass filter.Common broadband ridge waveguide low pass filter comprises body, and described body inner waveguide chamber, the two ends of described waveguide cavity have input port and output port respectively, are evenly equipped with resonant column along in the waveguide cavity between input port and output port.This broadband ridge waveguide low pass filter, have easy to connect with waveguide radio frequency front end, process the advantage that consistency is good, reliability is high.But when this filter is used in millimere-wave band, require that the size of ridge waveguide is less, requirement on machining accuracy is high, processing is got up very difficult.Because the size of ridge waveguide is little, resonant column in ridge waveguide low-frequency filter is also very tiny, and gap between resonant column is also very little, for the low pass filter of a 38G, the cross sectional dimensions of resonant column only has 0.8mmX0.8mm, and the gap between resonant column only has 0.85mm.Due to the cross sectional dimensions of resonant column and the gap of resonance intercolumniation all very little, make to add man-hour resonant column and be easily out of shape, easily occur burr, thus cannot debug, not only not can manufacture, and conforming product rate is low.
Utility model content
Problem to be solved in the utility model is to provide a kind of waveguide high frequency low pass filter.This waveguide high frequency low pass filter, not high to requirement on machining accuracy, not only can be mass, and conforming product rate is high.
The problems referred to above to be solved in the utility model are realized by following technical scheme:
Waveguide high frequency low pass filter of the present utility model comprises body, and described body is tabular, and its one side has the rectangular channel at through body two ends, the notch of rectangular channel has cover plate, forms waveguide cavity by the cover plate of rectangular channel and rectangular notch.The two ends of described waveguide cavity have input port and output port respectively.Be characterized in there are at least two partition walls in the waveguide cavity between input port and output port, leave spacing between the top of described partition wall and cover plate, described partition wall is arranged along the longitudinal direction of described waveguide cavity and leaves spacing each other.Wherein, the described spacing described in that in the middle of described waveguide cavity spacing to input port and the spacing between output port broaden gradually by narrow.
Further improvement of the utility model is, described partition wall has two, and the height of this two partition wall is equal.
Further improvement of the utility model is, described partition wall has two, and one of them partition wall height is higher than another partition wall.
Described partition wall has three, and that middle partition wall height is higher than the partition wall of its both sides.
Further improvement of the utility model is, described partition wall has three, in two partition walls of both sides: a partition wall height is higher than another partition wall.
Further improvement of the utility model is, described partition wall has four, and two middle partition wall height are equal and higher than outermost two partition wall height.
Wherein, in outermost two partition walls, a partition wall height is higher than another partition wall.
Of the present utility model further improvement is that, in the spacing between adjacent two partition walls, minimum spacing width is not less than 1.1mm, and maximum spacing width is not more than 1/4 of operating frequency wavelength.
Take such scheme, have the following advantages:
As can be seen from the above scheme, owing to having at least two partition walls in the waveguide cavity between input port and output port, leave spacing between the top of described partition wall and cover plate, described partition wall is arranged along the longitudinal direction of described waveguide cavity and leaves spacing each other.Partition wall is adopted to instead of resonant column.Because partition wall is tabular, be convenient to processing, can debug, can not only realize producing in enormous quantities, enhance productivity, and greatly can improve the qualification rate of product.
Accompanying drawing explanation
Fig. 1 is waveguide high frequency low-pass filter structure schematic diagram of the present utility model;
Fig. 2 is the schematic top plan view of the Fig. 2 after removing cover plate.
Embodiment
As depicted in figs. 1 and 2, waveguide high frequency low pass filter of the present utility model comprises body 1, and described body 1 is tabular, and its one side is processed with the rectangular channel at through body 1 two ends, the notch of rectangular channel there is cover plate 4, form waveguide cavity 3 by the cover plate 4 of rectangular channel and rectangular notch.The two ends of described waveguide cavity 3 have input port 2 and output port 6 respectively.Have at least two partition walls 5 in waveguide cavity 3 between input port 2 and output port 6, leave spacing between the top of described partition wall 5 and cover plate 4, described partition wall 5 is arranged along the longitudinal direction of described waveguide cavity 3 and leaves spacing 7 each other.Wherein, the described spacing 7 described in that in the middle of described waveguide cavity 3 spacing 7 to input port 2 and the spacing 7 between output port 6 broaden gradually by narrow.Wherein, in the spacing 7 between adjacent two partition walls 5, minimum spacing 7 width is not less than 1.1mm, and maximum spacing width is not more than 1/4 of operating frequency wavelength.In the present embodiment, minimum spacing 7 width is 1.2mm, and maximum spacing 7 width is 1/8 of operating frequency wavelength.
Described partition wall 5 can be two, and the height of this two partition wall can be equal, also can be that partition wall 5 height is higher than another partition wall 5.
Described partition wall 5 can be three, and wherein, that middle partition wall 5 height is higher than the partition wall 5 of its both sides.Also can be in two partition walls 5 of both sides: partition wall 5 height is higher than another partition wall 5.
Described partition wall 5 can be four, and two middle partition walls 5 are highly equal and higher than outermost two partition walls 5 height.Also can be in outermost two partition walls 5, partition wall 5 height be higher than another partition wall 5.
In the present embodiment, described partition wall 5 has six.Wherein, two middle partition walls 5 are highly equal, and every two partition walls 5 of two of centre partition wall 5 both sides are highly equal and outside in being arranged symmetrically with between two.
Claims (8)
1. a waveguide high frequency low pass filter, comprises body, and described body is tabular, and its one side has the rectangular channel at through body two ends, the notch of rectangular channel has cover plate, forms waveguide cavity by the cover plate of rectangular channel and rectangular notch; The two ends of described waveguide cavity have input port and output port respectively; It is characterized in that there are at least two partition walls in the waveguide cavity between input port and output port, leave spacing between the top of described partition wall and cover plate, described partition wall is arranged along the longitudinal direction of described waveguide cavity and leaves spacing each other; Wherein, the described spacing described in that in the middle of described waveguide cavity spacing to input port and the spacing between output port broaden gradually by narrow.
2. waveguide high frequency low pass filter according to claim 1, it is characterized in that described partition wall has two, the height of this two partition wall is equal.
3. waveguide high frequency low pass filter according to claim 1, is characterized in that described partition wall has two, and one of them partition wall height is higher than another partition wall.
4. waveguide high frequency low pass filter according to claim 1, is characterized in that described partition wall has three, and that middle partition wall height is higher than the partition wall of its both sides.
5. waveguide high frequency low pass filter according to claim 4, is characterized in that described partition wall has three, in two partition walls of both sides: a partition wall height is higher than another partition wall.
6. waveguide high frequency low pass filter according to claim 1, is characterized in that described partition wall has four, and two middle partition wall height are equal and higher than outermost two partition wall height.
7. waveguide high frequency low pass filter according to claim 6, is characterized in that in outermost two partition walls, a partition wall height is higher than another partition wall.
8. the waveguide high frequency low pass filter according to any one of claim 1 ~ 7, is characterized in that in the spacing between adjacent two partition walls, minimum spacing width is not less than 1.1mm, and maximum spacing width is not more than 1/4 of operating frequency wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420513968.XU CN204156067U (en) | 2014-09-09 | 2014-09-09 | A kind of waveguide high frequency low pass filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420513968.XU CN204156067U (en) | 2014-09-09 | 2014-09-09 | A kind of waveguide high frequency low pass filter |
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| CN204156067U true CN204156067U (en) | 2015-02-11 |
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| CN201420513968.XU Active CN204156067U (en) | 2014-09-09 | 2014-09-09 | A kind of waveguide high frequency low pass filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241746A (en) * | 2014-09-09 | 2014-12-24 | 江苏贝孚德通讯科技股份有限公司 | Waveguide high-frequency low-pass filter |
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- 2014-09-09 CN CN201420513968.XU patent/CN204156067U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241746A (en) * | 2014-09-09 | 2014-12-24 | 江苏贝孚德通讯科技股份有限公司 | Waveguide high-frequency low-pass filter |
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