CN105896007B - A kind of microwave band-pass filter - Google Patents
A kind of microwave band-pass filter Download PDFInfo
- Publication number
- CN105896007B CN105896007B CN201610332749.5A CN201610332749A CN105896007B CN 105896007 B CN105896007 B CN 105896007B CN 201610332749 A CN201610332749 A CN 201610332749A CN 105896007 B CN105896007 B CN 105896007B
- Authority
- CN
- China
- Prior art keywords
- value
- groove
- strip
- metal
- pass filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
-
- 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
- H01P1/20327—Electromagnetic interstage coupling
- H01P1/20336—Comb or interdigital filters
Abstract
The invention discloses a kind of compound groove microwave band-pass filters.Including dielectric-slab (1), dielectric-slab (1) is equipped with metal micro-strip (2), and the both sides of metal micro-strip (2) are equipped with metal (3)；Compound groove is distributed in the metal micro-strip (2)；The compound groove includes rectangle main groove (7), and sub- groove (8) is distributed on the side of rectangle main groove (7).The present invention has the characteristics that low transmission loss, avoids electromagnetic field strong reflection and anti-electromagnetic interference capability strong.
Description
Technical field
The present invention relates to a kind of filter of communication field, especially a kind of microwave band-pass with compound groove structure
Filter.
Background technology
In the big data epoch, as the demand of information is in explosive growth, field of mobile communication requires that collection can be produced
Technically there is a series of problems however as the continuous diminution of high-frequency integrated circuit size at higher microwave device is spent,
Such as certain degree, the electromagnetic interference noise of device are arrived when the size of microwave device is small, RC retardation ratio etc. reaches capacity and leads to device
Part job insecurity, therefore existing microwave device has not adapted to the development of current extensive microwave integrated circuit.
Invention content
The object of the present invention is to provide a kind of microwave band-pass filters.The present invention has low transmission loss, avoids electromagnetism
Strong reflection and the strong feature of anti-electromagnetic interference capability.
Technical scheme of the present invention：A kind of microwave band-pass filter, including dielectric-slab, dielectric-slab be equipped with metal it is micro-
Band, the both sides of metal micro-strip are equipped with metal；Compound groove is distributed in the metal micro-strip；The compound groove includes
Sub- groove is distributed on the side of rectangle main groove in rectangle main groove.
In microwave band-pass filter above-mentioned, the metal micro-strip includes co-planar waveguide section, and co-planar waveguide section is through transition
Section is connect with artificial surface phasmon section；Compound groove is distributed in the artificial surface phasmon section.
In microwave band-pass filter above-mentioned, the changeover portion is equipped with the compound groove of depth gradual change.
In microwave band-pass filter above-mentioned, the co-planar waveguide section is equipped with interdigital structure.
In microwave band-pass filter above-mentioned, the value of the depth D1 of the rectangle main groove is 3~6mm, rectangle master
The value of the width D 2 of groove is 1.0~4.0mm, and the period p of rectangle main groove is 3~8mm；The width D 3 of the sub- groove
Value be 0.1~0.5mm, the value of the depth D4 of sub- groove is 0.1~1.0mm, 1 value of period p of sub- groove is 0.1~
0.5mm。
In microwave band-pass filter above-mentioned, the value of the center initial position z of the interdigital structure is 4~8mm, fork
The value for referring to the gap width w1 of structure is 0.1~0.5mm, and the single tine of interdigital structure refers to length L4Value be 2.0~
The value of 5.0mm, the single tine finger widths w2 of interdigital structure are 0.5~1.5mm, the overall length L of interdigital structure5Value be 25~
40mm。
In microwave band-pass filter above-mentioned, the edge on the metal ground in transition fragment position is to meet Y=h+g+w*
(exp(a*(X-L1)/L2) -1) curve of/(expa-1) equation；Wherein a is curve shape coefficient, and value is 5~20；H is
Metal micro-strip width, value are 8~15mm；G is metal micro-strip with metal spacing, and value is 0.3~1mm, and w is metal
Ground width, value are 20~35mm, L1For the length of co-planar waveguide section, value is 5~15mm, and L2 is transition section length,
Value is 60~90mmm.
Compared with prior art, the present invention in metal micro-strip by being arranged a series of compound groove, the compound groove
Including rectangle main groove, and the sub- groove of periodic arrangement is distributed on the side of rectangle main groove, which can be effective
Ground enhances the distribution capacity and distributed inductance of rectangle main groove so that electromagnetic wave is highly strapped in transmission in compound groove
Portion thus greatly reduces the electromagnetic interference occurred because spacing is too small when plurality of transmission lines transmission so that electromagnetism interference energy
Power greatly enhances, while also enhancing the stability when work of high density microwave integrated circuit, moreover, because of electromagnetism interference
Ability greatly enhances, and the present invention can also reduce the spacing between the metal micro-strip of microwave integrated circuit to realize high integrated level and device
The miniaturization of part, thus the development of current extensive microwave integrated circuit can be better adapted to.Moreover, the present invention can also lead to
The geometric dimension of compound groove is overregulated to regulate and control the cutoff frequency and magnetic distribution of microwave transmission line, while adjusting electromagnetic wave
Constraint effect, applicant has found after carrying out a large number of experiments, when D1 is between 3~6mm, D2 between 1.0~4.0mm, p 3~
Between 8mm, p1 between 0.1~0.5mm, D3 between 0.1~0.5mm, D4 between 0.1~1.0mm when, compound groove to electromagnetic field have
There is constraint effect well.
The present invention is in co-planar waveguide section (below with its length symbol L1Substitute) and artificial surface phasmon section (following use
Its length symbol L3Substitute) between setting changeover portion (below with its length symbol L2Substitute), meanwhile, in L2On be additionally provided with depth gradually
The compound groove become；With this configuration, electromagnetic field is realized in L1And L3The smooth transition of middle propagation avoids electromagnetic field by standard
TEM mode is converted into the strong microwave electric field reflection occurred by pattern and impedance mismatch when SSPPs mode propagations；Application
People has found by many experiments, when in L2The edge on the metal ground of position meets Y=h+g+w* (exp (a* (X-L1)/L2)-
1)/(expa-1) equation, wherein curve shape coefficient a are 5~20, metal micro-strip width h is 8~15mm, metal micro-strip with gold
Possession spacing g is 0.3~1mm, metal width w be 20~35mm, co-planar waveguide segment length is L1For 5~15mm, changeover portion
Length L2For 60~90mm when, electromagnetic field propagate transition it is most steady.
The present invention is equipped with interdigital structure also in co-planar waveguide section；It, can be in the lower stopband of filter by interdigital structure
An attenuation pole is generated, the squareness factor of filtering is improved, and can be used for regulating and controlling the band external characteristics of the lower stopband of filter.
In order to preferably prove that beneficial effects of the present invention, application have carried out following experiment：Applicant designs a microwave
Bandpass filter sample, the parameter such as table 1 of sample.
1 microwave filter sample each section parameter (unit of table：mm)
The dielectric-slab of the sample uses dielectric constant for 2.65 substrate, has through time domain to the filtering curve of the sample
Difference Calculation is limited as shown in figure 4, S11 is filter reflection coefficients in Fig. 4, S21 is filter transfer coefficient, which is band logical
Filtering, centre frequency 4.7451GHz, -3dB passband are 3.1504GHz to 6.3398GHz, and sample is in entire passband
Ripple shake is better than 0.8dB, and passband internal reflection is less than -10dB.
In order to illustrate the advantageous effect of changeover portion in the present invention, applicant devises a comparison filter：Without transition
Section L2With the filter of the compound groove of depth gradual change, the dielectric-slab of filter is all 2.65 using dielectric constant, other knots
Structure parameter is the same as table 1.Its filtering curve is calculated as shown in Figure 5 through Fdtd Method.It is learnt by Fig. 5, which does not have
There are filter effect, its interior reflectance factor of entire frequency range to substantially exceed -10dB.It follows that changeover portion answering with depth gradual change
The filter for closing groove has good ground mode and impedance matching effect, and the reflection characteristic of filter is made to be effectively improved.
In addition, interdigital structure can generate an attenuation pole in the lower stopband of filter, the pole location is flexibly controllable, can
Easily regulate and control the band external characteristics of filter low-frequency range.Fig. 6 is shown, when without this finger-cross structure, lower stopband (0-3GHz's) declines
Subtract the process of pole disappearance.Finger-cross structure is opened on the microstrip transmission line of co-planar waveguide section in the present invention, does not increase filtering
The overall dimensions of device are convenient for the miniaturization of filter.
Fig. 7 is sample in 4GHz band operations, and the distribution map of the electric field of compound groove vicinity, as seen from Figure 7, electric field is high
Degree is bound by compound inside grooves, and diffusion is smaller.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram at the A of Fig. 1；
Fig. 3 is the structural schematic diagram at the B of Fig. 1；
Fig. 4 is the S parameter curve graph of sample.
Fig. 5 is the S parameter curve graph for the filter for not using changeover portion；
Fig. 6 is the S parameter curve graph for the filter for not using finger-cross structure；
Fig. 7 is filter sample in 4GHz band operations, compound groove normal direction distribution map of the electric field.
Label in attached drawing be：1- dielectric-slabs, 2- metal micro-strips, 3- metals, 4- co-planar waveguide sections, 5- changeover portions, 6-
Artificial surface phasmon section, 7- rectangle main grooves, 8- grooves, 9- interdigital structures.
Specific implementation mode
The present invention is further illustrated with reference to the accompanying drawings and examples, but be not intended as to the present invention limit according to
According to.
Embodiment.A kind of compound groove microwave band-pass filter is constituted as illustrated in fig. 1 and 2, including dielectric-slab 1, dielectric-slab
1 is equipped with metal micro-strip 2, the both sides of metal micro-strip 2 equipped with metal 3；It is distributed in the metal micro-strip 2 compound recessed
Slot；The compound groove includes rectangle main groove 7, and sub- groove 8 is distributed on the side of rectangle main groove 7.
Metal micro-strip 2 above-mentioned includes co-planar waveguide section 4, and co-planar waveguide section 4 is through changeover portion 5 and artificial surface phasmon
Section 6 connects；Compound groove is distributed in the artificial surface phasmon section 6.
Changeover portion 5 above-mentioned is equipped with the compound groove of depth gradual change.
Co-planar waveguide section 4 above-mentioned is equipped with interdigital structure 9.
The value of the depth D1 of rectangle main groove 7 above-mentioned is 3~6mm, and the value of the width D 2 of rectangle main groove 7 is
The period p of 1.0~4.0mm, rectangle main groove 7 are 3~8mm；The value of the width D 3 of the sub- groove 8 be 0.1~
The value of 0.5mm, the depth D4 of sub- groove 8 are 0.1~1.0mm, and 1 value of period p of sub- groove 8 is 0.1~0.5mm.
The value of the center initial position z of interdigital structure 9 above-mentioned is 4~8mm, the gap width w1's of interdigital structure 9
Value is 0.1~0.5mm, and the single tine of interdigital structure 9 refers to length L4Value be 2.0~5.0mm, the single tine of interdigital structure 9 refers to
The value of width w2 is 0.5~1.5mm, the overall length L of interdigital structure 95Value be 25~40mm.
In microwave band-pass filter above-mentioned, the metal in 5 position of changeover portion 3 edge be to meet Y=h+g+w*
(exp(a*(X-L1)/L2) -1) curve of/(expa-1) equation；Wherein a is curve shape coefficient, and value is 5~20；H is
Metal micro-strip width, value are 8~15mm；G is with metal 3 spacing of metal micro-strip 2, and value is 0.3~1mm, and w is gold
Possession width, value are 20~35mm, L1For the length of co-planar waveguide section, value is 5~15mm, and L2 is transition segment length
Degree, value are 60~90mmm.
The operation principle of the present invention：The electromagnetic field of Quasi-TEM mode is by the co-planar waveguide section 4 on the left side through the filter of finger-cross structure 9
Wave is transferred to changeover portion 5, and the electromagnetic field of SSPPs patterns, and the quasi- TEM moulds in changeover portion 5 are gradually faded in changeover portion 5
The electromagnetic field of formula and SSPPs patterns coexists, and when electromagnetic field reaches artificial surface phasmon section 6, is fully converted to SSPPs moulds
The electromagnetic field of formula, and in L3It is transmitted, SSPPs patterns electromagnetic field passes through TEM subject to the changeover portion conversion on the right again after transmission
The electromagnetic field of pattern is exported by the finger-cross structure and co-planar waveguide section on the right.When electromagnetic field is in the propagation of co-planar waveguide section 4, the section
The pattern of electromagnetic field is Quasi-TEM mode, and the pattern electromagnetic field is with being bound in co-planar waveguide section 4 and metal in the dielectric-slab between 3；
When changeover portion 5 is propagated, Quasi-TEM mode coexists with SSPPs patterns in the section, and wherein Quasi-TEM mode electromagnetic field was bound in
With crossing section 5 and metal in the dielectric-slab between 3, SSPPs pattern electromagnetic fields are bound in compound inside grooves；In L3It is propagated
When, the interior section is SSPPs patterns, which is bound in compound inside grooves.
Claims (5)
1. a kind of microwave band-pass filter, it is characterised in that：Including dielectric-slab（1）, dielectric-slab（1）Be equipped with metal micro-strip
（2）, metal micro-strip（2）Both sides equipped with metal（3）；The metal micro-strip（2）On compound groove is distributed with；Described answers
It includes rectangle main groove to close groove（7）, rectangle main groove（7）Side on sub- groove is distributed with（8）；The metal micro-strip
（2）Including co-planar waveguide section（4）, co-planar waveguide section（4）Through changeover portion（5）With artificial surface phasmon section（6）Connection；It is described
Artificial surface phasmon section（6）On compound groove is distributed with；The co-planar waveguide section（4）It is equipped with interdigital structure（9）.
2. microwave band-pass filter according to claim 1, it is characterised in that：The changeover portion（5）It is equipped with depth
The compound groove of gradual change.
3. microwave band-pass filter according to claim 1 or 2, it is characterised in that：The rectangle main groove（7）Depth
The value for spending D1 is 3~6mm, rectangle main groove（7）Width D 2 value be 1.0~4.0mm, rectangle main groove（7）Week
Phase p is 3~8mm；The sub- groove（8）Width D 3 value be 0.1~0.5mm, sub- groove（8）Depth D4 value
For 0.1~1.0mm, sub- groove（8）1 value of period p be 0.1~0.5mm.
4. microwave band-pass filter according to claim 1, it is characterised in that：The interdigital structure（9）Center rise
The value of beginning position z is 4~8mm, interdigital structure（9）Gap width w1 value be 0.1~0.5mm, interdigital structure（9）'s
Single tine refers to length L4Value be 2.0~5.0mm, interdigital structure（9）Single tine finger widths w2 value be 0.5~1.5mm, fork
Refer to structure（9）Overall length L5Value be 25~40mm.
5. microwave band-pass filter according to claim 1, it is characterised in that：In changeover portion（5）The metal of position
（3）Edge be to meet Y=h+g+w* (exp (a* (X-L1)/L2) -1) curve of/(expa-1) equation；Wherein a is curved shape
Shape coefficient, value are 5~20；H is metal micro-strip width, and value is 8~15mm；G is metal micro-strip（2）With metal
（3）Spacing, value are 0.3~1mm, and for metal width, value are 20~35mm, L to w1For the length of co-planar waveguide section,
Its value is 5~15mm, and L2 is transition section length, and value is 60~90mmm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610332749.5A CN105896007B (en) | 2016-05-19 | 2016-05-19 | A kind of microwave band-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610332749.5A CN105896007B (en) | 2016-05-19 | 2016-05-19 | A kind of microwave band-pass filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105896007A CN105896007A (en) | 2016-08-24 |
| CN105896007B true CN105896007B (en) | 2018-11-09 |
Family
ID=56717020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610332749.5A Expired - Fee Related CN105896007B (en) | 2016-05-19 | 2016-05-19 | A kind of microwave band-pass filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105896007B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106486729B (en) * | 2016-09-29 | 2021-05-04 | 东南大学 | Compact closed-loop resonator based on artificial surface plasmon |
| CN106532205A (en) * | 2017-01-04 | 2017-03-22 | 梧州学院 | Bending type microwave band-pass filter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852110A (en) * | 2014-02-14 | 2015-08-19 | 中华大学 | Differential pair microstrip line with low crosstalk and high-frequency transmission |
| CN105119029A (en) * | 2015-09-16 | 2015-12-02 | 江苏师范大学 | High-efficient broadband band-pass filter based on artificial surface Plasmon |
| CN105789790A (en) * | 2016-04-27 | 2016-07-20 | 六盘水师范学院 | Spoof surface plasmon polaritons (SSPPs) type microwave band-pass filter |
-
2016
- 2016-05-19 CN CN201610332749.5A patent/CN105896007B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852110A (en) * | 2014-02-14 | 2015-08-19 | 中华大学 | Differential pair microstrip line with low crosstalk and high-frequency transmission |
| CN105119029A (en) * | 2015-09-16 | 2015-12-02 | 江苏师范大学 | High-efficient broadband band-pass filter based on artificial surface Plasmon |
| CN105789790A (en) * | 2016-04-27 | 2016-07-20 | 六盘水师范学院 | Spoof surface plasmon polaritons (SSPPs) type microwave band-pass filter |
Non-Patent Citations (1)
| Title |
|---|
| Broadband and high-efficiency conversion from guided waves to spoof surface plasmon polaritons;Hui Feng Ma;《Laser & Photonic Reviews》;20140131;第8卷(第1期);146-151 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105896007A (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205752469U (en) | A kind of oval arc-shaped groove microwave filter | |
| CN105789790A (en) | Spoof surface plasmon polaritons (SSPPs) type microwave band-pass filter | |
| CN105932376B (en) | A kind of microwave band-pass filter with pairs of transmission line structure | |
| CN105958162B (en) | A kind of microwave low-pass filter with semi arch groove structure | |
| CN206059607U (en) | A kind of spiral metal micro-strip loaded type microwave band-pass filter | |
| CN105896007B (en) | A kind of microwave band-pass filter | |
| CN105811056B (en) | A kind of artificial phasmon type bandpass filter | |
| CN105896006B (en) | A kind of microwave band-pass filter of splitting ring load | |
| CN104409809B (en) | Changeable bandpass and band-rejection filter based on parallel coupled line | |
| CN207572507U (en) | A kind of miniaturization quasi-elliptic function microstrip bandpass filter based on SIR | |
| CN106848508A (en) | A kind of wide-band microwave bandpass filter | |
| CN105896004A (en) | Artificial plasmon type microwave band pass filter with step impedance unit | |
| CN205666305U (en) | Two plane type tippers etc. are from excimer type microwave filter | |
| CN109244609B (en) | A kind of square groove structure microwave filter with dual band operation characteristic | |
| CN206480738U (en) | A kind of bandwidth adjustable microwave wave filter with elliptic arc tongue structure | |
| CN205666306U (en) | S type recesses etc. are from excimer type microwave filter | |
| CN107732383A (en) | A kind of dual-band microwave bandpass filter | |
| CN205752467U (en) | A kind of stub loads rectangular channel microwave filter | |
| CN205666302U (en) | Tippers etc. are from excimer type microwave filter | |
| CN206076462U (en) | A kind of microwave band-pass filter of splitting ring loading | |
| CN205752463U (en) | A kind of low pass microwave filter with trapezoidal groove structure | |
| CN207009617U (en) | A kind of specular rectangular recess microwave band-pass filter | |
| CN206098627U (en) | V groove structure manual works etc. are from excimer type band pass filter | |
| CN205790298U (en) | A kind of microwave band-pass filter with cross loaded line | |
| CN207009614U (en) | A kind of microwave band-pass filter with pairs of transmission line structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181109 Termination date: 20190519 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |