CN206727197U - A kind of microwave low-pass filter with mirror image - Google Patents
A kind of microwave low-pass filter with mirror image Download PDFInfo
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- CN206727197U CN206727197U CN201720593598.9U CN201720593598U CN206727197U CN 206727197 U CN206727197 U CN 206727197U CN 201720593598 U CN201720593598 U CN 201720593598U CN 206727197 U CN206727197 U CN 206727197U
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- strip
- transition section
- microstrip transition
- pass filter
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Abstract
A kind of microwave filter of communication field is the utility model is related to, specifically a kind of microwave low-pass filter with mirror image.Wave filter is made up of the rectangular recess of periodic arrangement, specifically include dielectric-slab, it is micro- that one surface of the dielectric-slab is provided with the first metal, first metal micro-strip includes microstrip transition section, the microstrip transition section passes through artificial surface phasmon section, the microstrip transition section is connected with the second metal micro-strip, and the structure has the characteristics of upper and lower specular, has gap between mirror-image structure.The utility model has the advantages of strong low transmission loss, anti-electromagnetic interference capability and working stability.
Description
Technical field
A kind of microwave filter of communication field is the utility model is related to, is specifically that one kind has specular periodically
The microwave low-pass filter of the rectangular recess structure of arrangement.
Background technology
With the fast development of the 5th generation mobile communication, people are all with day to the demand of communication information capacity and communication speed
Increase, field of mobile communication requirement can produce the higher microwave device of integrated level, however as microwave integrated circuit size not
Disconnected to reduce, the stability of circuit work starts a series of problems occurred.This includes, when the size of microwave integrated device is small to one
Fixed degree, start serious electromagnetic interference noise occur in device, the RC retardation ratio of device reaches capacity and also causes microwave circuit
Job insecurity, therefore existing microwave device has not adapted to the development of current extensive high-frequency integrated circuit.
Utility model content
For above-mentioned weak point of the prior art, the utility model aims to provide a kind of low transmission loss, anti-electromagnetism
Interference performance is strong and the microwave low-pass filter with mirror image of working stability.
In order to solve the above technical problems, the microwave low-pass filter of the present utility model with mirror image, filtering
Device is made up of the rectangular recess of periodic arrangement, specifically includes dielectric-slab, and a surface of the dielectric-slab is provided with the first gold medal
Belong to micro-, first metal micro-strip includes microstrip transition section, and the microstrip transition section passes through artificial surface phasmon section, described
Microstrip transition section is connected with the second metal micro-strip, and the structure has the characteristics of upper and lower specular, has gap between mirror-image structure.
Preferably, the microstrip transition section is made up of rectangular metal micro-strip and rectangular air groove.
Preferably, the microstrip transition section has the structure, artificial surface etc. of the first exponential curve and the second exponential curve
From the rectangular metal micro-strip and rectangular air groove that upper and lower specular is distributed with excimer section.
Preferably, the width of rebate of the rectangular air groove is 1~6mm, 2~9mm of groove depth, 3~8mm of grooved cycle；
Gap between the rectangular air groove symmetrical above and below is 0.01~1.0mm, the width 0.5 of described rectangular metal micro-strip~
10.0mm, 10~80mm of width of described dielectric-slab.
Preferably, the microstrip transition section is provided with the rectangular recess symmetrical above and below of depth gradual change.
Microwave low-pass filter of the present utility model with mirror image, by artificial surface phasmon section
It is upper that a series of rectangular recess symmetrical above and below is set；Pass through the structure so that it is right up and down that electromagnetic field is bound in transmission
Around the rectangular recess of title, so as to greatly reduce when plurality of transmission lines transmits because of the electromagnetic interference that spacing is too small and occurs, make
Obtain microwave circuit antijamming capability to greatly enhance, while also enhance stability when high density microwave integrated circuit works, no
Only in this way, because anti-electromagnetic interference capability greatly enhances, the utility model can also reduce between the metal micro-strip of microwave integrated circuit
Spacing can better adapt to the development of current extensive microwave integrated circuit to realize the miniaturization of device.
Brief description of the drawings
Fig. 1 is a kind of front (reverse side) structure of microwave low-pass filter with mirror image of the present utility model
Schematic diagram；
Fig. 2 is that a kind of S parameter of sample of the microwave low-pass filter with mirror image of the present utility model is bent
Line chart.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe.
As shown in figure 1, the microwave low-pass filter of the present utility model with mirror image, wave filter is by periodically
The rectangular recess composition of arrangement, specifically includes dielectric-slab 1, and a surface of the dielectric-slab 1 is provided with the first metal micro-strip 2,
First metal micro-strip 2 includes microstrip transition section 3, and the microstrip transition section 3 passes through artificial surface phasmon section, described micro-
Band changeover portion 3 is connected with the second metal micro-strip 7, and the structure has the characteristics of upper and lower specular, has gap between mirror-image structure
6。
Further, the microstrip transition section 3 is made up of rectangular metal micro-strip 4 and rectangular air groove 5.
Further, the microstrip transition section 3 has the structure of the first exponential curve 8 and the second exponential curve 9, labor statement
The rectangular metal micro-strip 4 and rectangular air groove 5 of upper and lower specular are distributed with the phasmon section of face.
Further, the width of rebate of the rectangular air groove 5 is 1~6mm, 2~9mm of groove depth, grooved cycle 3~
8mm；Gap between the rectangular air groove 5 symmetrical above and below is 0.01~1.0mm, the width of described rectangular metal micro-strip 4
Spend 0.5~10.0mm, 10~80mm of width of described dielectric-slab 1.
Further, the microstrip transition section (3) is provided with the rectangular recess symmetrical above and below of depth gradual change.
In order to preferably prove the beneficial effects of the utility model, application has carried out following experiment：Applicant designs one
Rectangular recess structure microwave low-pass filter sample with specular, periodic arrangement, the parameter such as table 1 of sample.
Table 1：Microwave filter sample each several part parameter (unit：mm)
| Structure title | Symbol | Size |
| Microstrip transition segment length | l1 | 30 |
| Artificial surface phasmon segment length | l2 | 63 |
| Rectangular recess width of rebate | w1 | 3 |
| Load groove groove depth | Ch1 | 4.0 |
| Load groove grooved cycle | p | 5.0 |
| Rectangular recess gap symmetrical above and below | d | 0.1 |
| Metal ground width | w | 58.2 |
| Exponential curve form factor | a | 3.9 |
| Metal micro-strip width | h | 7 |
The dielectric-slab of the sample uses dielectric constant to have for 2.65 substrate to the filtering curve of the sample through time domain
Difference Calculation is limited as shown in Fig. 2 S11 is filter reflection coefficients in Fig. 2, S21 is filter transfer coefficient, and the sample is low pass
Filtering, its centre frequency is 1.996GHz, and insertion loss is 0.43dB at this, and its -3dB passband is direct current to 3.992GHz, sample
Product are less than -12.2dB in whole passband reflection coefficient, and ripple shake is less than 1.5dB.
Specifically, operation principle of the present utility model, electromagnetic field by the left side the feed-in of microstrip transition section 3, in transmitting procedure
Evolve as the electromagnetic field of artificial phasmon (SSPPs) pattern, and transverse electric field mode and SSPPs in microstrip transition section 3
The electromagnetic field of pattern coexists, and when electromagnetic field reaches artificial surface phasmon section (being made up of 4 and 5), is fully converted to SSPPs
The electromagnetic field of pattern, and be transmitted in artificial surface phasmon section, SSPPs patterns electromagnetic field passes through the right again after transmission
Changeover portion is converted into the electromagnetic field output of transverse electric field mode.When electromagnetic field is propagated in microstrip transition section 3, transverse electric field mould in the section
Formula coexists with SSPPs patterns, and wherein transverse electric field mode is gradually transitions SSPPs patterns, and SSPPs patterns electromagnetic field is progressively by beam
It is tied to around rectangular air groove 5 symmetrical above and below；It is SSPPs in the section when artificial surface phasmon section is propagated
Pattern, the pattern electromagnetic field are bound in around rectangular air groove 5 symmetrical above and below.
Claims (5)
- A kind of 1. microwave low-pass filter with mirror image, it is characterised in that：Wave filter by periodic arrangement square Connected in star forms, and specifically includes dielectric-slab (1), a surface of the dielectric-slab (1) is provided with the first metal micro-strip (2), institute Stating the first metal micro-strip (2) includes microstrip transition section (3), and the microstrip transition section (3) passes through artificial surface phasmon section, institute State microstrip transition section (3) to be connected with the second metal micro-strip (7), and the structure has the characteristics of upper and lower specular, mirror-image structure Between have gap (6).
- A kind of 2. microwave low-pass filter with mirror image according to claim 1, it is characterised in that：It is described Microstrip transition section (3) is made up of rectangular metal micro-strip (4) and rectangular air groove (5).
- A kind of 3. microwave low-pass filter with mirror image according to claim 2, it is characterised in that：It is described Microstrip transition section (3) has a structure of the first exponential curve (8) and the second exponential curve (9), in artificial surface phasmon section The rectangular metal micro-strip (4) and rectangular air groove (5) of upper and lower specular is distributed with.
- A kind of 4. microwave low-pass filter with mirror image according to claim 3, it is characterised in that：It is described The width of rebate of rectangular air groove (5) is 1~6mm, 2~9mm of groove depth, 3~8mm of grooved cycle；The square symmetrical above and below Gap between shape air grooves (5) is 0.01~1.0mm, 0.5~10.0mm of width of described rectangular metal micro-strip (4), institute 10~the 80mm of width for the dielectric-slab (1) stated.
- A kind of 5. microwave low-pass filter with mirror image according to claim 1, it is characterised in that：It is described Microstrip transition section (3) is provided with the rectangular recess symmetrical above and below of depth gradual change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720593598.9U CN206727197U (en) | 2017-05-25 | 2017-05-25 | A kind of microwave low-pass filter with mirror image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720593598.9U CN206727197U (en) | 2017-05-25 | 2017-05-25 | A kind of microwave low-pass filter with mirror image |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206727197U true CN206727197U (en) | 2017-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720593598.9U Expired - Fee Related CN206727197U (en) | 2017-05-25 | 2017-05-25 | A kind of microwave low-pass filter with mirror image |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109461997A (en) * | 2018-11-08 | 2019-03-12 | 哈尔滨工业大学 | Changeover portion compact transmission line based on interdigitated artificial surface phasmon |
| CN113948837A (en) * | 2021-09-28 | 2022-01-18 | 西安交通大学 | W-band E-plane waveguide bandpass filter |
-
2017
- 2017-05-25 CN CN201720593598.9U patent/CN206727197U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109461997A (en) * | 2018-11-08 | 2019-03-12 | 哈尔滨工业大学 | Changeover portion compact transmission line based on interdigitated artificial surface phasmon |
| CN109461997B (en) * | 2018-11-08 | 2020-10-02 | 哈尔滨工业大学 | Transition section compact transmission line based on interdigital artificial surface plasmon |
| CN113948837A (en) * | 2021-09-28 | 2022-01-18 | 西安交通大学 | W-band E-plane waveguide bandpass filter |
| US11682817B1 (en) | 2021-09-28 | 2023-06-20 | Xi'an Jiaotong University | W-band E-plane waveguide bandpass filter |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171208 Termination date: 20180525 |
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| CF01 | Termination of patent right due to non-payment of annual fee |