CN105514546B - High degree of suppression bandstop filter - Google Patents
High degree of suppression bandstop filter Download PDFInfo
- Publication number
- CN105514546B CN105514546B CN201610050915.2A CN201610050915A CN105514546B CN 105514546 B CN105514546 B CN 105514546B CN 201610050915 A CN201610050915 A CN 201610050915A CN 105514546 B CN105514546 B CN 105514546B
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- transmission line
- medium substrate
- resonator
- suppression
- conductive transmission
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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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- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a kind of high degree of suppression bandstop filters, including medium substrate, one surface of the medium substrate is fixed with conductive transmission line, one end of the conductive transmission line is signal input part, the other end of the conductive transmission line is signal output end, the conductive transmission line both ends are corresponding with the both ends of the medium substrate to flush setting, the side fixed and arranged for being located at the fixed conductive transmission line on the medium substrate has resonator, the resonator is arranged on the medium substrate in mode in one line, it respectively corresponds through each resonator equipped with ground hole, the ground connection hole surface is equipped with conductive layer；Above structure bandstop filter can satisfy the requirement in the broadband compact 500MHz, high degree of suppression is high, degree of suppression reaches 40dB in stopband range, it is compared with traditional bandstop filter, also have the characteristics that small in size, index is excellent and batch production is easily realized, it can arbitrarily be cut out according to the actual needs of user, it is very convenient to use.
Description
Technical field
The present invention relates to a kind of signal transmission apparatus technical field more particularly to a kind of high degree of suppression bandstop filters.
Background technique
Bandstop filter is a kind of important component in modern communication systems, especially power amplifier system,
In antenna system and mixing system etc., the effect of bandstop filter is particularly important.Bandstop filter is in stop-band frequency width
On be broadly divided into narrowband and broadband two types: general tens MHz of the frequency bandwidth of narrowband or so；The frequency bandwidth in broadband exists
1GHz or so, the bandstop filter of high degree of suppression refer mainly to the bandstop filter that belt resistance inhibitor system is more than or equal to 40dB.
Bandstop filter currently used in the market, high degree of suppression filter in the range of stop-band frequency bandwidth is 500MHz
Wave device is the technical indicator being relatively inaccessible to because using traditional structure microstrip transmission line and corresponding construction phase mutual coupling
It closes and is difficult to reach requirement, so that bandwidth be made to be extremely difficult to require.Simultaneously as the bandstop filter of high degree of suppression and being adopted
It is related with the order of filter, when the volume to high degree of suppression bandstop filter has very strong demand, traditional structure bandreject filtering
Device is to be extremely difficult to require.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of high degree of suppression bandreject filterings that is small in size, easily producing in batches
Device.
In order to solve the above technical problems, the technical scheme is that high degree of suppression bandstop filter, including medium base
Plate, a surface of the medium substrate are fixed with conductive transmission line, and one end of the conductive transmission line is signal input part, described
The other end of conductive transmission line is signal output end, and the conductive transmission line both ends are corresponding with the both ends of the medium substrate to be flushed
It is arranged, the side fixed and arranged that the fixed conductive transmission line is located on the medium substrate has resonator, and the resonator exists
It is arranged on the medium substrate in mode in one line, respectively corresponds through each resonator equipped with ground hole, it is described
It is grounded hole surface and is equipped with conductive layer.
The medium substrate is set as ceramic substrate as a preferred technical solution,.
The resonator is rectangular configuration as a preferred technical solution, and the ground hole is located in the resonator
The heart.
The diameter of the ground hole is set as 0.15~0.25mm as a preferred technical solution,.
The resonator is set as eight as a preferred technical solution,.
The conductive transmission line is set as the microstrip transmission line being cut by conductive material as a preferred technical solution,.
By adopting the above-described technical solution, high degree of suppression bandstop filter, including medium substrate, the medium substrate
One surface is fixed with conductive transmission line, and one end of the conductive transmission line is signal input part, the conductive transmission line it is another
End is signal output end, and the conductive transmission line both ends are corresponding with the both ends of the medium substrate to flush setting, the medium base
The side fixed and arranged for being located at the fixed conductive transmission line on plate has resonator, and the resonator is on the medium substrate
Mode in one line is arranged, and respectively corresponds through each resonator equipped with ground hole, and the ground connection hole surface is equipped with and leads
Electric layer；The beneficial effects of the present invention are: above structure bandstop filter can satisfy the requirement in the broadband compact 500MHz,
High degree of suppression is high, and degree of suppression reaches 40dB and compares with traditional bandstop filter in stopband range, also has small in size, index
The features such as excellent and batch production is easily realized, can arbitrarily be cut out according to the actual needs of user, very convenient to use.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
In figure: 1- medium substrate；2- conductive transmission line；3- resonator；4- ground hole；5- conductive layer.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, high degree of suppression bandstop filter, including medium substrate 1, the medium substrate 1 are set as ceramic base
Plate, quality is solid, and service life is high, it can also be ensured that the stability of filter, the miniaturization for realizing filter.The medium base
One surface of plate 1 is fixed with conductive transmission line 2, and one end of the conductive transmission line 2 is signal input part, the conductive transmission line
2 other end is signal output end, and 2 both ends of conductive transmission line are corresponding with the both ends of the medium substrate 1 to flush setting, institute
It states conductive transmission line 2 and is set as the microstrip transmission line being cut by conductive material.
The side fixed and arranged for being located at the fixed conductive transmission line 2 on the medium substrate 1 has resonator 3, described humorous
The device 3 that shakes is arranged on the medium substrate 1 in mode in one line, and resonator 3 described in the present embodiment is set as eight,
It respectively corresponds through each resonator 3 equipped with ground hole 4,4 surface of ground hole is equipped with conductive layer 5, the ground hole 4
Diameter is set as 0.2mm.The resonator 3 is rectangular configuration, and the ground hole 4 is located at the center of the resonator 3.It is each described
Between resonator 3 and the resonator 3 is all without contact with the conductive transmission line 2.
The bandstop filter of traditional structure mainly using transmission line side be added " L " type resonance structure unit or
The shortcomings that hair fastener type resonance structure unit, this spline structure, is resonant element and transmission line coupling amount not enough to be not achieved
The requirement of 500MHz bandwidth of rejection, while increasing perpendicular to the size on transmission line direction.Using the resonance of rectangle earthing block
Device structure can solve both of these problems simultaneously, because rectangular configuration is all increased in coupling and Effective coupling length and area
Add, and the mode of center setting ground hole solves maximization and shortens resonance structure unit ruler on perpendicular to transmission line direction
Very little problem.
Above structure bandstop filter of the present invention can satisfy the requirement in the broadband compact 500MHz, high degree of suppression
Height, degree of suppression reaches 40dB and compares with traditional bandstop filter in stopband range, also have small in size, index excellent and batch
The features such as amount production is easily realized, can arbitrarily be cut out according to the actual needs of user, very convenient to use.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (2)
1. high degree of suppression bandstop filter, including medium substrate, it is characterised in that: a surface of the medium substrate, which is fixed with, leads
Electric transmission line, one end of the conductive transmission line are signal input part, and the other end of the conductive transmission line is signal output end,
The conductive transmission line both ends are corresponding with the both ends of the medium substrate to flush setting, is located at described in fixing on the medium substrate
The side fixed and arranged of conductive transmission line has resonator, and the resonator arranges on the medium substrate in mode in one line
Setting, respectively corresponds through each resonator equipped with ground hole, and the ground connection hole surface is equipped with conductive layer；
The medium substrate is set as ceramic substrate；
The resonator is rectangular configuration, and the ground hole is located at the center of the resonator；
The diameter of the ground hole is set as 0.15~0.25mm；
The resonator is set as eight.
2. high degree of suppression bandstop filter as described in claim 1, it is characterised in that: the conductive transmission line is set as by leading
The microstrip transmission line that electric material is cut into.
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 |
|---|---|
| CN105514546A CN105514546A (en) | 2016-04-20 |
| CN105514546B true CN105514546B (en) | 2019-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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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| CN105514546A (en) | 2016-04-20 |
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