CN206574829U - Wave filter - Google Patents
Wave filter Download PDFInfo
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- CN206574829U CN206574829U CN201720285917.XU CN201720285917U CN206574829U CN 206574829 U CN206574829 U CN 206574829U CN 201720285917 U CN201720285917 U CN 201720285917U CN 206574829 U CN206574829 U CN 206574829U
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- wave filter
- resonant rod
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- capacitive coupling
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Abstract
The utility model embodiment provides a kind of wave filter, belongs to technical field of electronic devices.The wave filter that the utility model embodiment is provided, by the structure for the resonant rod for improving resonator, capacitive coupling enhancing structure is set to increase the transmission zero of wave filter in one end of its resonant rod, so that wave filter only passes through the signal in free transmission range as much as possible, suppress passing through for the signal outside free transmission range as much as possible simultaneously, that is, improve the selecting frequency characteristic and Out-of-band rejection ability of wave filter.In addition, the size of wave filter can be greatly increased by way of the Out-of-band rejection ability for improving wave filter increasing basic filter unit compared with prior art, the utility model embodiment meets wave filter towards the development trend of small size by setting capacitive coupling enhancing structure to improve the Out-of-band rejection ability of wave filter, the filter construction that the utility model embodiment is provided is simple, it is easy to fabricate.
Description
Technical field
The utility model embodiment is related to technical field of electronic devices, more particularly to a kind of wave filter.
Background technology
With developing rapidly for mobile communication, satellite communication and Radar Technology, miniaturization, high performance device have become
The developing direction of microwave current RF application, wave filter in communication system as being used to suppress the indispensable weight of interference signal
Want passive device, it is possible to achieve the signal of passband passes through, and the noise outside rejection band.
Present use frequency range has been quite full, and in order to tackle the frequency resource of growing tension, system is to wave filter
Performance proposes higher requirement, and the Out-of-band rejection of wave filter directly affects the quality of communication system noise performance, conventional
Wave filter improves the Out-of-band rejection ability of wave filter by increasing the exponent number of wave filter, however, increasing the exponent number of wave filter to carry
The Out-of-band rejection ability effect of high filter is not good.
Utility model content
In view of this, one of technical problem that the utility model embodiment is solved is to provide a kind of wave filter, is used to
Overcome the problem of Out-of-band rejection ability effect of prior art median filter is not good.
The utility model embodiment provides a kind of wave filter, including：Medium substrate and multiple resonators, it is the multiple humorous
The device that shakes is arranged on the surface of the medium substrate, and the multiple resonator is coupled each other, in the multiple resonator extremely
One end of the resonant rod of a few resonator has the capacitive coupling enhancing structure for the transmission zero for increasing the wave filter.
Alternatively, the capacitive coupling enhancing structure is that length increases structure.
Alternatively, the length increase structure is kink, is arranged on the kink court of one end of the resonant rod
To the side of another resonant rod adjacent with the resonant rod.
Alternatively, the capacitive coupling enhancing structure is that width increases structure, and width increase structure widens direction
Towards the side of another resonant rod adjacent with the resonant rod.
Alternatively, the syntonizer being connected with signal input line have the capacitive coupling enhancing structure and/or with letter
The syntonizer of number output line connection has the capacitive coupling enhancing structure.
Alternatively, in addition to ground hole, the ground hole through the resonant rod of the resonator the other end and given an account of
Matter substrate.
Alternatively, the longitudinal centre line of the multiple resonator is collinearly arranged on the surface of the medium substrate.
Alternatively, the multiple resonator is by the regularly arranged surface on the medium substrate of pectination type；Or institute
Multiple resonators are stated by the interdigitated regularly arranged surface on the medium substrate；Or the multiple resonator is by mixing
On the regularly arranged surface on the medium substrate of type.
Alternatively, coupled modes are to be electrically coupled and/or magnetic coupling to the multiple resonator each other.
Alternatively, the number of the resonator is six.
The wave filter that the utility model embodiment is provided, the structure of the resonant rod by improving resonator, in its resonant rod
One end set capacitive coupling enhancing structure to increase the transmission zero of wave filter so that wave filter only passes through passband as much as possible
In the range of signal, while the signal suppressed as much as possible outside free transmission range passes through, that is, improve the selecting frequency characteristic of wave filter with
And Out-of-band rejection ability.In addition, the Out-of-band rejection ability of wave filter is improved by increasing basic filter unit compared with prior art
Mode can greatly increase the size of wave filter, the utility model embodiment is by setting capacitive coupling enhancing structure to improve
The Out-of-band rejection ability of wave filter meets the filtering that wave filter is provided towards the development trend of small size, the utility model embodiment
Device is simple in construction, it is easy to fabricate.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments described in the utility model embodiment, for those of ordinary skill in the art, can also be according to this
A little accompanying drawings obtain other accompanying drawings.
Fig. 1 a are the planar structure schematic diagrams of the exemplary wave filter of the utility model one.
Fig. 1 b are the dimensional structure diagrams of the exemplary wave filter of the utility model one.
Fig. 2 a are the planar structure schematic diagrams of the another exemplary wave filter of the utility model.
Fig. 2 b are the dimensional structure diagrams of the another exemplary wave filter of the utility model.
Fig. 3 a are the planar structure schematic diagrams of the another exemplary wave filter of the utility model.
Fig. 3 b are the dimensional structure diagrams of the another exemplary wave filter of the utility model.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the utility model embodiment, below in conjunction with this
Accompanying drawing in utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, and shows
So, described embodiment is only a part of embodiment of the utility model embodiment, rather than whole embodiments.Based on this reality
The every other embodiment obtained with the embodiment in new embodiment, those of ordinary skill in the art, should all belong to this
The scope of utility model embodiment protection.
Further illustrate that the utility model embodiment is implemented with reference to the utility model embodiment accompanying drawing.
Fig. 1 a are the planar structure schematic diagrams of the exemplary wave filter of the utility model one.Fig. 1 b are that the utility model one shows
The dimensional structure diagram of the wave filter of example property.
As illustrated in figs. 1A and ib, the utility model embodiment provides a kind of wave filter, including：Medium substrate and multiple
Resonator, the multiple resonator is arranged on the surface of the medium substrate 01, and the multiple resonator is coupled each other,
One end of the resonant rod of at least one resonator has the appearance for the transmission zero for increasing the wave filter in the multiple resonator
Property coupling enhancing structure.
Specifically, medium substrate 01 is the load-carrying unit of wave filter, when from medium substrate 01, is made pottery from aluminum oxide
The materials such as porcelain, beryllium oxide, sapphire, ferrite, polytetrafluoroethylene (PTFE), to be reduced as far as the shadow to the selecting frequency characteristic of wave filter
Ring, and then ensure that the Out-of-band rejection ability of wave filter is interference-free.
Specifically, resonator is the core parts of wave filter, and the resonator of high quality factor can improve the frequency-selecting of wave filter
Characteristic, and then improve the Out-of-band rejection ability of wave filter.It should be noted that multiple resonators can be electrically coupled each other
Based on or magnetic coupling based on, but not limited to this.
In a kind of possible implementation, the wave filter in the present embodiment also includes ground hole 9, and ground hole 9 is through humorous
Shake device resonant rod the other end and medium substrate 01.The size of ground hole 9 and the position set are set according to the actual requirements
It is fixed.So that wave filter is bandpass filter as an example, appropriate ground hole 9 coordinates appropriate resonant rod to make bandpass filter in height
There is a transmission zero, even if bandpass filter has preferably Out-of-band rejection to the noise signal of high band on the stopband of frequency range
Ability.
It should be noted that multiple resonators press the rule setting of setting on the surface of medium substrate 01.For the ease of
Narration, one end of resonant rod is referred to as ungrounded nose end, and the other end of resonant rod is referred to as being grounded nose end.
In a kind of possible implementation, multiple resonators press the regularly arranged surface in medium substrate 01 of pectination type
On.As illustrated in figs. 1A and ib, the ground connection nose end of the resonant rod of all resonators is in homonymy.In another possible realization side
In formula, multiple resonators are by interdigitated regularly arranged on the surface of medium substrate 01.As shown in Figure 2 a and 2 b, it is adjacent successively
Two resonators, the resonant rod of a wave filter ground connection nose end and another wave filter resonant rod ungrounded nose end at
In homonymy.In another possible implementation, multiple resonators press the regularly arranged surface in medium substrate 01 of mixed type
On.As shown in Figure 3 a and Figure 3 b shows, what the ground connection nose end of the resonant rod of different resonators had is in homonymy, and what is had is in heteropleural.When
So, arranged according to the actual requirements on the surface of medium substrate multiple resonators, the utility model is not limited.Preferably, if
The longitudinal centre line for putting multiple resonators on the surface of medium substrate is conllinear, and whole filtering can be so saved as much as possible
The size of device.
The wave filter that the utility model embodiment is provided, the structure of the resonant rod by improving resonator, in its resonant rod
One end set capacitive coupling enhancing structure to increase the transmission zero of wave filter so that wave filter only passes through passband as much as possible
In the range of signal, while the signal suppressed as much as possible outside free transmission range passes through, that is, improve the selecting frequency characteristic of wave filter with
And Out-of-band rejection ability.In addition, the Out-of-band rejection ability of wave filter is improved by increasing basic filter unit compared with prior art
Mode can greatly increase the size of wave filter, the utility model is by setting capacitive coupling enhancing structure to improve wave filter
Out-of-band rejection ability meet wave filter towards the development trend of small size, the filter construction that the present embodiment is provided is simple, easily
In processing and manufacturing.
Specifically, wave filter of the present utility model is not limited to low pass filter, high-pass filter, bandpass filter etc..It is right
For low pass filter, its passband is arranged on the stopband of high band in low-frequency range, its stopband in high band, the position of transmission zero
On.For high-pass filter, its passband is arranged on low-frequency range in high band, its stopband in low-frequency range, the position of transmission zero
Stopband on.For bandpass filter, its passband is distributed in the both sides of intermediate bands, i.e. high frequency in intermediate bands, its stopband
Section and low-frequency range, transmission zero can set at least two, and one is arranged on the stopband of low-frequency range, and one is arranged on high band
Stopband on, so as to realize that bandpass filter height end resistance band is respectively provided with transmission zero, effectively improve the Out-of-band rejection of wave filter
Ability.It should be noted that setting position and the number of transmission zero according to the actual requirements, the position of transmission zero is between resistance
The critical bands of band and passband are excellent, and the number of transmission zero is more, and the Out-of-band rejection ability of wave filter is better.
Specifically, the capacitive coupling enhancing structure that the utility model is set in resonant rod according to the actual requirements, such as, according to
Actual demand selects one or more resonators to set capacitive coupling enhancing structure, or selects capacitive coupling according to the actual requirements
The structure type of enhancing structure.
In a kind of possible implementation, capacitive coupling enhancing structure is that length increases structure.For example, by
The setting kink of one end of resonant rod increases structure, and the kink direction another resonance adjacent with resonant rod to form length
The side of bar, so as to reduce the spacing of two adjacent resonant rods, reaches the purpose of the degree of coupling between enhancing resonator, and then
Realization makes wave filter have transmission zero.It should be noted that the present embodiment increases resonant rod by the form of the windings such as bending
Length, depending on resonant rod specifically needs to increase how much length according to the actual requirements.In addition, the form that the present embodiment passes through bending
Increase manufacture requirement of the length also for the small size for meeting wave filter of resonant rod.
In another possible implementation, capacitive coupling enhancing structure is that width increases structure, width increase structure
Widen direction towards another resonant rod adjacent with resonant rod side.It should be noted that the present embodiment is by along court
Increase the width of resonant rod to the side of another resonant rod adjacent with resonant rod, so that between reducing two adjacent resonant rods
Away from, the purpose of the degree of coupling between enhancing resonator is reached, and then realizing makes wave filter have transmission zero.Need explanation
It is, depending on resonant rod specifically needs to increase how many width according to the actual requirements.
It should be noted that determine to need to increase the number of the resonator of capacitive coupling enhancing structure according to the actual requirements,
Be shown in Fig. 1 a, Fig. 1 b in six rank wave filters, six resonators two there is capacitive coupling enhancing structure.Certainly, six resonance
In device can also be one, three, four, five, six has capacitive coupling enhancing structure, with specific reference to actual demand, sheet
Utility model is not limited.Further, the resonator being connected with signal input line have capacitive coupling enhancing structure and/or with
The resonator of output line connection has capacitive coupling enhancing structure.It should be noted that by signal input line by signal
In feed-in wave filter, signal is fed out by wave filter by output line.The present embodiment makes the resonance being connected with signal input line
Utensil has capacitive coupling enhancing structure, i.e., it is outer to suppress more bands to the signal of feed-in by first resonator in wave filter
Signal, so as to so that feed-in others resonators in signal contain less out of band signal；And then filter is better achieved
Rejection ability of the ripple device to the signal outside band.The present embodiment makes the resonator being connected with output line have capacitive coupling enhancing
Structure, i.e., the signal fed out by last resonator control in wave filter contains the signal outside less band.
Detailed illustration is carried out with six rank wave filters shown in Fig. 1 a, Fig. 1 b below.
It is six rank wave filters shown in Fig. 1 a and Fig. 1 b, with six resonators.It is exemplary illustration shown in Fig. 1 a, Fig. 1 b,
The new wave filter of this implementation can adaptability according to the actual requirements extension, such as have three resonators third-order filter,
Four-step filter with four resonators, five rank wave filters with five resonators etc..
As illustrated in figs. 1A and ib, six rank wave filters include medium substrate 01, it is resonator 2, resonator 3, resonator 4, humorous
Shake device 5, resonator 6 and resonator 7.Signal input line 1 is connected with resonator 2, and output line 8 is connected with resonator 7, ground connection
Resonator and medium substrate 01 are run through in hole 9.One end of resonant rod 10 of the resonator 2 of the present embodiment is bent downwards, and towards resonance
Device 3 is bent, and one end of resonant rod 10 of resonator 7 is bent downwards, and is bent towards resonator 6.As six in the present embodiment
When rank wave filter is bandpass filter, by controlling degree resonator 7 that one end of resonant rod 10 of resonator 2 bends downwards
The degree that the one end of resonant rod 10 is bent downwards, can make the height end resistance band of six rank wave filters be respectively provided with transmission zero, effectively carry
The Out-of-band rejection ability of high six ranks wave filter.
Certainly, implementing any technical scheme of the utility model embodiment must be not necessarily required to while reaching all of the above
Advantage.
The embodiment of the utility model embodiment can be provided as method, device (equipment) or computer program product.Cause
This, in terms of the utility model embodiment can be using complete hardware embodiment, complete software embodiment or combination software and hardware
The form of embodiment.Moreover, the utility model embodiment can be used wherein includes computer available programs one or more
Implement in the computer-usable storage medium (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.) of code
The form of computer program product.
The utility model embodiment is with reference to according to the method for the utility model embodiment, device (equipment) and computer journey
The flow chart and/or block diagram of sequence product is described.It should be understood that can be by computer program instructions implementation process figure and/or square frame
Each flow and/or square frame in figure and the flow in flow chart and/or block diagram and/or the combination of square frame.This can be provided
A little computer program instructions are to all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices
Processor to produce a machine so that pass through computer or the finger of the computing device of other programmable data processing devices
Order, which is produced, to be used to realize what is specified in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple square frames
The device of function.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which is produced, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that in meter
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, thus in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Although having been described for the preferred embodiment of the utility model embodiment, those skilled in the art once learn
Basic creative concept, then can make other change and modification to these embodiments.So, appended claims are intended to solution
It is interpreted as including preferred embodiment and falls into having altered and changing for the utility model scope of embodiments.Obviously, this area
Technical staff can carry out the essence of various changes and modification without departing from the utility model embodiment to the utility model embodiment
God and scope.So, if these modifications and variations of the utility model embodiment belong to the utility model embodiment right and wanted
Ask and its equivalent technologies within the scope of, then the utility model embodiment be also intended to comprising these change and modification including.
Claims (10)
1. a kind of wave filter, it is characterised in that including：Medium substrate and multiple resonators, the multiple resonator are arranged on
On the surface of the medium substrate, the multiple resonator is coupled each other, described at least one in the multiple resonator
One end of the resonant rod of resonator has the capacitive coupling enhancing structure for the transmission zero for increasing the wave filter.
2. wave filter according to claim 1, it is characterised in that the capacitive coupling enhancing structure is that length increases knot
Structure.
3. wave filter according to claim 2, it is characterised in that the length increase structure is kink, is arranged on institute
State the side of the kink direction another resonant rod adjacent with the resonant rod of one end of resonant rod.
4. wave filter according to claim 1, it is characterised in that the capacitive coupling enhancing structure is that width increases knot
Structure, the side for widening the direction direction another resonant rod adjacent with the resonant rod of the width increase structure.
5. wave filter according to claim 2, it is characterised in that the syntonizer being connected with signal input line is
The syntonizer stated capacitive coupling enhancing structure and/or be connected with output line has the capacitive coupling enhancing structure.
6. wave filter according to claim 2, it is characterised in that also including ground hole, the ground hole is through described humorous
Shake device resonant rod the other end and the medium substrate.
7. the wave filter according to any one of claim 1 to 6, it is characterised in that the longitudinal center of the multiple resonator
Line is collinearly arranged on the surface of the medium substrate.
8. the wave filter according to any one of claim 1 to 6, it is characterised in that the multiple resonator is advised by pectination type
Then it is arranged on the surface on the medium substrate；Or the multiple resonator is by interdigitated regularly arranged in the medium base
On surface on plate；Or the multiple resonator is by the regularly arranged surface on the medium substrate of mixed type.
9. the wave filter according to any one of claim 1 to 6, it is characterised in that the multiple resonator coupling each other
Conjunction mode is to be electrically coupled and/or magnetic coupling.
10. the wave filter according to any one of claim 1 to 6, it is characterised in that the number of the resonator is six.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720285917.XU CN206574829U (en) | 2017-03-22 | 2017-03-22 | Wave filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720285917.XU CN206574829U (en) | 2017-03-22 | 2017-03-22 | Wave filter |
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| Publication Number | Publication Date |
|---|---|
| CN206574829U true CN206574829U (en) | 2017-10-20 |
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| CN201720285917.XU Active CN206574829U (en) | 2017-03-22 | 2017-03-22 | Wave filter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658532A (en) * | 2017-10-23 | 2018-02-02 | 石家庄创天电子科技有限公司 | Wave filter |
| CN110444843A (en) * | 2019-09-04 | 2019-11-12 | 上海海事大学 | The bandpass filter that can be switched based on frequency adjustable structure |
| CN110518324A (en) * | 2019-07-16 | 2019-11-29 | 杭州电子科技大学 | It is a kind of with it is outer introduce dual transfer zero broadband filter |
| CN112753130A (en) * | 2018-09-28 | 2021-05-04 | 株式会社村田制作所 | Bandpass filter, communication device, and resonator |
-
2017
- 2017-03-22 CN CN201720285917.XU patent/CN206574829U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658532A (en) * | 2017-10-23 | 2018-02-02 | 石家庄创天电子科技有限公司 | Wave filter |
| CN112753130A (en) * | 2018-09-28 | 2021-05-04 | 株式会社村田制作所 | Bandpass filter, communication device, and resonator |
| CN112753130B (en) * | 2018-09-28 | 2022-08-05 | 株式会社村田制作所 | Bandpass filter, communication device, and resonator |
| CN110518324A (en) * | 2019-07-16 | 2019-11-29 | 杭州电子科技大学 | It is a kind of with it is outer introduce dual transfer zero broadband filter |
| CN110444843A (en) * | 2019-09-04 | 2019-11-12 | 上海海事大学 | The bandpass filter that can be switched based on frequency adjustable structure |
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