CN105514546A - High-inhibition-degree band-stop filter - Google Patents
High-inhibition-degree band-stop filter Download PDFInfo
- Publication number
- CN105514546A CN105514546A CN201610050915.2A CN201610050915A CN105514546A CN 105514546 A CN105514546 A CN 105514546A CN 201610050915 A CN201610050915 A CN 201610050915A CN 105514546 A CN105514546 A CN 105514546A
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- Prior art keywords
- transmission line
- medium substrate
- stop filter
- resonator
- band stop
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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
-
- 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
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a high-inhibition-degree band-stop filter which comprises a medium substrate. A conduction transmission line is fixed to the surface of the medium substrate. One end of the conduction transmission line is a signal input end. The other end of the conduction transmission line is a signal output end. The two ends of the conduction transmission line are arranged in the mode of corresponding to and being aligned to the two ends of the medium substrate. Harmonic oscillators are fixedly arranged on the portion, located at one side for fixing the conduction transmission line, of the medium substrate. The harmonic oscillators are arranged on the medium substrate in a line mode. Grounding holes are correspondingly formed in all the harmonic oscillators in a penetrating mode. Conducting layers are arranged on the surfaces of the grounding holes. The band-stop filter with the structure can meet the use requirement of compact type 500-MHz wide bands, and is high in inhibition degree, and the inhibition degree is 40 dB within the band-stop range; compared with a traditional band-stop filter, the high-inhibition-degree band-stop filter has the advantages of being small in size and excellent in index, batch production is easy to achieve, and the filter can be clipped at will according to the actual needs of a user, and is convenient to use.
Description
Technical field
The present invention relates to a kind of signal transmission apparatus technical field, particularly relate to a kind of high degree of suppression band stop filter.
Background technology
In modern communication systems, band stop filter is a kind of important components and parts, and particularly in power amplifier system, antenna system and mixing system etc., the effect of band stop filter seems particularly important.Band stop filter is mainly divided into arrowband and broadband two type on stop-band frequency width: general about tens MHz of frequency bandwidth of arrowband; The frequency bandwidth in broadband is at about 1GHz, and the band stop filter of high degree of suppression mainly refers to that belt resistance inhibitor system is more than or equal to the band stop filter of 40dB.
The band stop filter used in the market, high degree of suppression filter in the scope that stop-band frequency bandwidth is 500MHz is a more inaccessible technical indicator, because adopt traditional structure to be difficult to reach requirement on the intercoupling of microstrip transmission line and corresponding construction, thus make bandwidth be difficult to reach requirement.Simultaneously because the band stop filter of high degree of suppression is relevant with the exponent number of institute employing filter, have the volume of high degree of suppression band stop filter require very by force time, traditional structure band stop filter is difficult to reach requirement.
Summary of the invention
Technical problem to be solved by this invention is to provide the high degree of suppression band stop filter of little, the easy batch production of a kind of volume.
For solving the problems of the technologies described above, technical scheme of the present invention is: high degree of suppression band stop filter, comprise medium substrate, one surface of described medium substrate is fixed with conductive transmission line, one end of described conductive transmission line is signal input part, the other end of described conductive transmission line is signal output part, described conductive transmission line two ends are corresponding with the two ends of described medium substrate flushes setting, the side stationary cloth described medium substrate being positioned at fixing described conductive transmission line is equipped with resonator, described resonator is mode spread configuration in one line on described medium substrate, run through each described resonator respectively correspondence be provided with ground hole, described ground hole surface is provided with conductive layer.
As preferred technical scheme, described medium substrate is set to ceramic substrate.
As preferred technical scheme, described resonator is rectangular configuration, and described ground hole is positioned at the center of described resonator.
As preferred technical scheme, the diameter of described ground hole is set to 0.15 ~ 0.25mm.
As preferred technical scheme, described resonator is set to eight.
As preferred technical scheme, described conductive transmission line is set to the microstrip transmission line be cut into by electric conducting material.
Owing to have employed technique scheme, high degree of suppression band stop filter, comprise medium substrate, one surface of described medium substrate is fixed with conductive transmission line, one end of described conductive transmission line is signal input part, the other end of described conductive transmission line is signal output part, described conductive transmission line two ends are corresponding with the two ends of described medium substrate flushes setting, the side stationary cloth described medium substrate being positioned at fixing described conductive transmission line is equipped with resonator, described resonator is mode spread configuration in one line on described medium substrate, run through each described resonator respectively correspondence be provided with ground hole, described ground hole surface is provided with conductive layer, the invention has the beneficial effects as follows: said structure band stop filter can meet the instructions for use in compact 500MHz broadband, high degree of suppression is high, in stopband range, degree of suppression reaches 40dB, compare with traditional band stop filter, also have that volume is little, index is excellent and the batch production easily feature such as realization, can cut out arbitrarily according to the actual needs of user, use easily.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the embodiment of the present invention;
In figure: 1-medium substrate; 2-conductive transmission line; 3-resonator; 4-ground hole; 5-conductive layer.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, high degree of suppression band stop filter, comprises medium substrate 1, and described medium substrate 1 is set to ceramic substrate, and quality is solid, high life, can also ensure the stability of filter, realize the miniaturization of filter.One surface of described medium substrate 1 is fixed with conductive transmission line 2, one end of described conductive transmission line 2 is signal input part, the other end of described conductive transmission line 2 is signal output part, described conductive transmission line 2 two ends are corresponding with the two ends of described medium substrate 1 flushes setting, and described conductive transmission line 2 is set to the microstrip transmission line be cut into by electric conducting material.
The side stationary cloth described medium substrate 1 being positioned at fixing described conductive transmission line 2 is equipped with resonator 3, described resonator 3 is mode spread configuration in one line on described medium substrate 1, resonator 3 described in the present embodiment is set to eight, run through each described resonator 3 respectively correspondence be provided with ground hole 4, described ground hole 4 surface is provided with conductive layer 5, and the diameter of described ground hole 4 is set to 0.2mm.Described resonator 3 is rectangular configuration, and described ground hole 4 is positioned at the center of described resonator 3.Between each described resonator 3, and described resonator 3 is all contactless with described conductive transmission line 2.
What the band stop filter of traditional structure mainly adopted is add " L " type resonance structure unit or hair fastener type resonance structure unit in transmission line side, the shortcoming of this spline structure is that resonant element and transmission line coupling amount are not thus do not reach the requirement of 500MHz bandwidth of rejection, add perpendicular to the size on transmission line direction simultaneously.Adopt the resonator structure of rectangle earthing block can solve this two problems simultaneously, because rectangular configuration increases all to some extent in coupling with Effective coupling length and area, and the center mode that arranges ground hole solves and maximizes shortening resonance structure unit in the problem perpendicular to size on transmission line direction.
Said structure band stop filter of the present invention can meet the instructions for use in compact 500MHz broadband, high degree of suppression is high, in stopband range, degree of suppression reaches 40dB, compare with traditional band stop filter, also have that volume is little, index is excellent and the batch production easily feature such as realization, can cut out arbitrarily according to the actual needs of user, use easily.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. high degree of suppression band stop filter, comprise medium substrate, it is characterized in that: a surface of described medium substrate is fixed with conductive transmission line, one end of described conductive transmission line is signal input part, the other end of described conductive transmission line is signal output part, described conductive transmission line two ends are corresponding with the two ends of described medium substrate flushes setting, the side stationary cloth described medium substrate being positioned at fixing described conductive transmission line is equipped with resonator, described resonator is mode spread configuration in one line on described medium substrate, run through each described resonator respectively correspondence be provided with ground hole, described ground hole surface is provided with conductive layer.
2. high degree of suppression band stop filter as claimed in claim 1, is characterized in that: described medium substrate is set to ceramic substrate.
3. high degree of suppression band stop filter as claimed in claim 2, is characterized in that: described resonator is rectangular configuration, and described ground hole is positioned at the center of described resonator.
4. high degree of suppression band stop filter as claimed in claim 1, is characterized in that: the diameter of described ground hole is set to 0.15 ~ 0.25mm.
5. the high degree of suppression band stop filter as described in claim as arbitrary in Claims 1-4, is characterized in that: described resonator is set to eight.
6. high degree of suppression band stop filter as claimed in claim 1, is characterized in that: described conductive transmission line is set to the microstrip transmission line be cut into by electric conducting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610050915.2A CN105514546B (en) | 2016-01-26 | 2016-01-26 | High degree of suppression bandstop filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610050915.2A CN105514546B (en) | 2016-01-26 | 2016-01-26 | High degree of suppression bandstop filter |
Publications (2)
| Publication Number | Publication Date |
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| CN105514546A true CN105514546A (en) | 2016-04-20 |
| CN105514546B CN105514546B (en) | 2019-04-16 |
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| CN201610050915.2A Active CN105514546B (en) | 2016-01-26 | 2016-01-26 | High degree of suppression bandstop filter |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102569954A (en) * | 2012-01-16 | 2012-07-11 | 电子科技大学 | Ultra-wideband microstrip filter |
| CN104485498A (en) * | 2015-01-07 | 2015-04-01 | 中国振华集团云科电子有限公司 | Micro-strip filter with sapphire substrate |
| CN204538155U (en) * | 2014-12-19 | 2015-08-05 | 哈尔滨黑石科技有限公司 | A kind of single trap ultra-wide band filter based on cross loading counterfoil |
| CN205355217U (en) * | 2016-01-26 | 2016-06-29 | 中国振华集团云科电子有限公司 | High suppression degree band elimination filter |
-
2016
- 2016-01-26 CN CN201610050915.2A patent/CN105514546B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102569954A (en) * | 2012-01-16 | 2012-07-11 | 电子科技大学 | Ultra-wideband microstrip filter |
| CN204538155U (en) * | 2014-12-19 | 2015-08-05 | 哈尔滨黑石科技有限公司 | A kind of single trap ultra-wide band filter based on cross loading counterfoil |
| CN104485498A (en) * | 2015-01-07 | 2015-04-01 | 中国振华集团云科电子有限公司 | Micro-strip filter with sapphire substrate |
| CN205355217U (en) * | 2016-01-26 | 2016-06-29 | 中国振华集团云科电子有限公司 | High suppression degree band elimination filter |
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| CN105514546B (en) | 2019-04-16 |
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