CN108417942A - Quarter-wave triangle FSIR four-step filters - Google Patents
Quarter-wave triangle FSIR four-step filters Download PDFInfo
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- CN108417942A CN108417942A CN201810352051.9A CN201810352051A CN108417942A CN 108417942 A CN108417942 A CN 108417942A CN 201810352051 A CN201810352051 A CN 201810352051A CN 108417942 A CN108417942 A CN 108417942A
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- fsir
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- copper plate
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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
- H01P1/212—Frequency-selective devices, e.g. filters suppressing or attenuating harmonic frequencies
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Abstract
The invention discloses a kind of quarter-wave triangle FSIR four-step filters comprising bottom copper plate, middle layer printed board substrate and top layer copper plate；Bottom copper plate is covered each by with top layer copper plate in the two sides of middle layer printed board substrate；Bottom copper plate is the full copper plate of ground connection, and top layer copper plate includes：One 1/4 wavelength triangle FSIR, the 2nd 1/4 wavelength triangle FSIR, the 3rd 1/4 wavelength triangle FSIR and the 4th 1/4 wavelength triangle FSIR；First feedback mouth and the second feedback mouth；And first plated-through hole, the second plated-through hole and third plated-through hole.This filter is simple in structure with high-performance benefits, simple printed circuit board process batch micro operations may be used, and machining accuracy can be very good to control, and ensure that the advantage of low cost.This filter can greatly reduce the size of filter, and filter actual size about reduces 99.2%.
Description
Technical field
The present invention relates to microwave and millimeter wave wave filter technology fields, and in particular to a kind of quarter-wave triangle FSIR
Four-step filter.
Background technology
Microwave and millimeter wave bandpass filter is the significant components of communication system and radar system, and function is in wireless receiving
Be particularly important in machine, in addition, in microwave band-pass filter or microwave and millimeter wave system many design problems key with
Core, such as frequency converter, frequency multiplier, frequency source and multichannel communication multiple telecommunication.Electromagnetic spectrum is limited, it is necessary to is subject to by different application
Distribution；And filter can not only be used for limiting radiation of the high-power transmitter in regulation frequency range, but also can be used for preventing from receiving
Machine is by the interference other than working band.In order to filter out the interference signal in foregoing circuit, need to use highly selective band logical
Filter, these filters make system external circle or internal noise signal have immunocompetence；It is embodied in bandpass filtering
The performances such as low-loss, upper sideband inhibition, the Wide stop bands of device.Ensureing the high performance of bandpass filter, in order to adapt to
The needs of system compact, the miniaturization of bandpass filter, which becomes, to be had to consider the problems of.In conclusion being pressed down based on upper sideband
It makes, the miniaturization bandpass filter of broad stop-band increasingly becomes the research hotspot of filter design field.
Past filter design volume is larger, and would generally occur passband near harmonic wave so that resistance band is limited.
Invention content
For above-mentioned deficiency in the prior art, quarter-wave triangle FSIR four-step filters provided by the invention
Solve the problems, such as existing filter volume is big, resistance band be limited it is big.
In order to reach foregoing invention purpose, the technical solution adopted by the present invention is：
There is provided a kind of quarter-wave triangle FSIR four-step filters comprising bottom copper plate, middle layer printing
Plate substrate and top layer copper plate；Bottom copper plate is covered each by with top layer copper plate in the two sides of middle layer printed board substrate；
Bottom copper plate is the full copper plate of ground connection, and top layer copper plate includes：
Four 1/4 wavelength triangle FSIR, i.e. the one 1/4 wavelength triangle FSIR, the 2nd 1/4 wavelength triangle FSIR,
3rd 1/4 wavelength triangle FSIR and the 4th 1/4 wavelength triangle FSIR；
Two feedback mouths, i.e., the first feedback mouth and the second feedback mouth；
And three metallization through top layer copper plate, middle layer printed board substrate and bottom copper plate and ground connection are logical
Hole, i.e. the first plated-through hole, the second plated-through hole and third plated-through hole；
One 1/4 wavelength triangle FSIR and the 2nd 1/4 wavelength triangle FSIR intersects the winding of embedded antisymmetry
Form first centrosymmetric resonant element；3rd 1/4 wavelength triangle FSIR and the 4th 1/4 wavelength triangle FSIR phases
Mutually intersect embedded antisymmetry and is wound second centrosymmetric resonant element；First resonant element and second resonance
Unit is symmetrical；
Third plated-through hole connects the 2nd 1/4 wavelength triangle FSIR's and the 4th 1/4 wavelength triangle FSIR simultaneously
Passband port；First plated-through hole and the second plated-through hole are separately connected the one 1/4 wavelength triangle FSIR and the 3rd 1/4
The passband port of wavelength triangle FSIR, the first plated-through hole and the second plated-through hole are left relative to third plated-through hole
It is right symmetrical；
First feedback mouth and the second feedback mouth are respectively arranged at the both ends of top layer copper plate and relative to a third plated-through hole left sides
It is right symmetrical；First feedback mouth is electrically connected with the one 1/4 wavelength triangle FSIR, the second feedback mouth and the 3rd 1/4 wavelength triangle FSIR
Electrical connection.
Further, the thickness of bottom copper plate and top layer copper plate is 0.0154mm.
Further, middle layer printed board substrate uses thickness to be made of 5880 dielectric material of Rogers of 0.508mm.
Further, the first feedback mouth and the second feedback mouth are all made of the feedback mouth of transition line form.
Further, 1/4 wavelength triangle FSIR is by half-wavelength SIR by being symmetrically folded inwardly to form half-wavelength FSIR,
Half-wavelength FSIR is folded to form 1/4 wavelength FSIR, is made after 1/4 wavelength FSIR is diagonally sheared.
Beneficial effects of the present invention are：
1, for this filter with high-performance benefits, structure is also very simple, and simple printed circuit may be used
Plate process lot manufactures, and machining accuracy can be very good to control, and yield rate is very high, ensure that the advantage of low cost.This filter
Wave device can large-scale application in communication, radar and other wireless systems, such as LMDS, MMDS, 4G, 5G, maritime affairs radar.
By using FSIR, this filter can greatly reduce the size of filter, and the actual physical size of filter is about 13mm
×10.53mm.This filter improves the degree of suppression of sideband by transmission zero, and resistance band is made to reach 6 subharmonic.
2, the first feedback mouth and the second feedback mouth use transition line form, are conducive to extended filtering device bandwidth peace slide-through band.
Description of the drawings
Fig. 1 is the structural schematic diagram of this filter；
Fig. 2 is this filter segment size indication figure；
Fig. 3 is the emulation of this filter, test curve figure；
Fig. 4 is the simulation result comparison diagram of this filter and existing filter.
Wherein：1, the one 1/4 wavelength triangle FSIR；2, the 2nd 1/4 wavelength triangle FSIR；3, the 3rd 1/4 wavelength three
Angular FSIR；4, the 4th 1/4 wavelength triangle FSIR；5, the first feedback mouth；6, the second feedback mouth；7, the first plated-through hole；8,
Two plated-through holes；9, third plated-through hole.
Specific implementation mode
The specific implementation mode of the present invention is described below, in order to facilitate understanding by those skilled in the art this hair
It is bright, it should be apparent that the present invention is not limited to the ranges of specific implementation mode, for those skilled in the art,
As long as various change is in the spirit and scope of the present invention that the attached claims limit and determine, these variations are aobvious and easy
See, all are using the innovation and creation of present inventive concept in the row of protection.
As shown in Figure 1, the quarter-wave triangle FSIR four-step filters include bottom copper plate, middle layer printing
Plate substrate and top layer copper plate；Bottom copper plate is covered each by with top layer copper plate in the two sides of middle layer printed board substrate；
Bottom copper plate is the full copper plate of ground connection, and top layer copper plate includes：
(Folding Stepped Impedance Resonator fold step resistance to four 1/4 wavelength triangle FSIR
Antiresonance device), i.e. the one 1/4 wavelength triangle FSIR1, the 2nd 1/4 wavelength triangle FSIR2, the 3rd 1/4 wavelength triangle
FSIR3 and the 4th 1/4 wavelength triangle FSIR4；
Two feedback mouths, i.e., the first feedback mouth 5 and second present mouth 6；
And three metallization through top layer copper plate, middle layer printed board substrate and bottom copper plate and ground connection are logical
Hole, i.e. the first plated-through hole 7, the second plated-through hole 8 and third plated-through hole 9；
One 1/4 wavelength triangle FSIR1 and the 2nd 1/4 wavelength triangle FSIR2 embedded antisymmetry that intersects twines
Around first centrosymmetric resonant element of formation；3rd 1/4 wavelength triangle FSIR3 and the 4th 1/4 wavelength triangle
The FSIR4 embedded antisymmetry that intersects is wound second centrosymmetric resonant element；First resonant element and
Two resonant elements are symmetrical；
Third plated-through hole 9 connects the 2nd 1/4 wavelength triangle FSIR2 and the 4th 1/4 wavelength triangle FSIR4 simultaneously
Passband port；First plated-through hole 7 and the second plated-through hole 8 be separately connected the one 1/4 wavelength triangle FSIR1 and
The passband port of 3rd 1/4 wavelength triangle FSIR3, the first plated-through hole 7 and the second plated-through hole 8 are relative to third
Plated-through hole 9 is symmetrical；
First feedback mouth 5 and second presents mouth 6 and is respectively arranged at the both ends of top layer copper plate and relative to third plated-through hole 9
It is symmetrical；First feedback mouth 5 is electrically connected with the one 1/4 wavelength triangle FSIR1, the second feedback mouth 6 and the 3rd 1/4 wavelength triangle
Shape FSIR3 electrical connections.
The thickness of bottom copper plate and top layer copper plate is 0.0154mm.
Middle layer printed board substrate uses thickness to be made of 5880 dielectric material of Rogers of 0.508mm.
First feedback mouth 5 and second presents the feedback mouth that mouth 6 is all made of transition line form.
1/4 wavelength triangle FSIR by half-wavelength SIR by being symmetrically folded inwardly to form half-wavelength FSIR, by half-wavelength
FSIR folds to form 1/4 wavelength FSIR, is made after 1/4 wavelength FSIR is diagonally sheared.
In one embodiment of the invention, as shown in Figure 2 and Table 1, the specific physical size of this filter can be accomplished
13mm × 10.53mm, corresponding guide wavelength size is the 0.10 λ g of λ g × 0.08, and size is reduced by about 99.2%.
Table 1：Filter circuit dimensional parameters
| Parameter | Value | Parameter | Value |
| S1 | 0.2 | S2 | 3.2 |
| L1 | 10.5 | L2 | 0.2 |
| e1 | 0.14 | e2 | 0.14 |
| e3 | 0.49 | w1 | 4.2 |
| wt | 0.2 | Lt | 1 |
| a1 | 0.9 | r1 | 0.3 |
| L3 | 9 |
As shown in figure 3, the upper and lower sideband of this filter inhibits because there is transmission zero so that its sideband suppression
Improved；The reason of belt resistance inhibitor system is because of transmission zero and SIR self-characteristics, width reaches 6 subharmonic.
As shown in figure 4, this filter is compared with existing filter (rectangle), this filter obviously in stopband inhibition more
Tool advantage.
As shown in table 2, this filter is smaller relative to existing miniaturization, high-performance difference filter, and performance is more
It is good.
Table 2
In conclusion this filter, with high-performance benefits, structure is also very simple, and simple print may be used
Circuit-board processes batch micro operations processed, and machining accuracy can be very good to control, and yield rate is very high, ensure that the excellent of low cost
Gesture.This filter can large-scale application in communication, radar and other wireless systems, such as LMDS, MMDS, 4G, 5G, maritime affairs thunder
Up to etc..By using FSIR, this filter can greatly reduce the size of filter, and the actual physical size of filter is about
13mm×10.53mm.This filter improves the degree of suppression of sideband by transmission zero, and make resistance band reach 6 times it is humorous
Wave.
Claims (5)
1. a kind of quarter-wave triangle FSIR four-step filters, it is characterised in that：It is printed including bottom copper plate, middle layer
Making sheet substrate and top layer copper plate；The bottom copper plate is covered each by with top layer copper plate in middle layer printed board substrate
Two sides；The bottom copper plate is the full copper plate of ground connection, and the top layer copper plate includes：
Four 1/4 wavelength triangle FSIR, i.e. the one 1/4 wavelength triangle FSIR, the 2nd 1/4 wavelength triangle FSIR, third
1/4 wavelength triangle FSIR and the 4th 1/4 wavelength triangle FSIR；
Two feedback mouths, i.e., the first feedback mouth and the second feedback mouth；
And three run through top layer copper plate, middle layer printed board substrate and bottom copper plate and the plated-through hole of ground connection,
That is the first plated-through hole, the second plated-through hole and third plated-through hole；
The one 1/4 wavelength triangle FSIR and the 2nd 1/4 wavelength triangle FSIR intersects the winding of embedded antisymmetry
Form first centrosymmetric resonant element；The 3rd 1/4 wavelength triangle FSIR and the 4th 1/4 wavelength triangle FSIR
The embedded antisymmetry that intersects is wound second centrosymmetric resonant element；First resonant element and second
A resonant element is symmetrical；
The third plated-through hole connects the 2nd 1/4 wavelength triangle FSIR's and the 4th 1/4 wavelength triangle FSIR simultaneously
Passband port；First plated-through hole and the second plated-through hole are separately connected the one 1/4 wavelength triangle FSIR and
The passband port of 3 1/4 wavelength triangle FSIR, first plated-through hole and the second plated-through hole are relative to third gold
Categoryization through-hole is symmetrical；
The first feedback mouth and the second feedback mouth are respectively arranged at the both ends of top layer copper plate and relative to a third plated-through hole left sides
It is right symmetrical；The first feedback mouth is electrically connected with the one 1/4 wavelength triangle FSIR, the second feedback mouth and the 3rd 1/4 wavelength three
Angular FSIR electrical connections.
2. quarter-wave triangle FSIR four-step filters according to claim 1, it is characterised in that：The bottom
The thickness of copper plate and top layer copper plate is 0.0154mm.
3. quarter-wave triangle FSIR four-step filters according to claim 1, it is characterised in that：The centre
Layer printed board substrate uses thickness to be made of 5880 dielectric material of Rogers of 0.508mm.
4. quarter-wave triangle FSIR four-step filters according to claim 1, it is characterised in that：Described first
Feedback mouth and the second feedback mouth are all made of the feedback mouth of transition line form.
5. quarter-wave triangle FSIR four-step filters according to claim 1, it is characterised in that：Described 1/4
Wavelength triangle FSIR folds half-wavelength FSIR to be formed by the way that half-wavelength SIR is symmetrically folded inwardly to form half-wavelength FSIR
1/4 wavelength FSIR is made after diagonally shearing 1/4 wavelength FSIR.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810352051.9A CN108417942A (en) | 2018-04-19 | 2018-04-19 | Quarter-wave triangle FSIR four-step filters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810352051.9A CN108417942A (en) | 2018-04-19 | 2018-04-19 | Quarter-wave triangle FSIR four-step filters |
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| Publication Number | Publication Date |
|---|---|
| CN108417942A true CN108417942A (en) | 2018-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810352051.9A Pending CN108417942A (en) | 2018-04-19 | 2018-04-19 | Quarter-wave triangle FSIR four-step filters |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208142321U (en) * | 2018-04-19 | 2018-11-23 | 超视距成都科技有限责任公司 | Quarter-wave triangle FSIR four-step filter |
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2018
- 2018-04-19 CN CN201810352051.9A patent/CN108417942A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208142321U (en) * | 2018-04-19 | 2018-11-23 | 超视距成都科技有限责任公司 | Quarter-wave triangle FSIR four-step filter |
Non-Patent Citations (2)
| Title |
|---|
| SHIH-CHENG LIN ET AL: ""Compact Microstrip Bandpass Filters with Quarter-Wavelength Stepped-Impedance Resonators"", 《2005 EUROPEAN MICROWAVE CONFERENCE》 * |
| 尉旭波: ""高性能小型化混合耦合滤波器设计与实现"", 《中国博士学位论文全文数据库》 * |
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Application publication date: 20180817 |
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