CN207743368U - A kind of microstrip coupled dielectric filter - Google Patents
A kind of microstrip coupled dielectric filter Download PDFInfo
- Publication number
- CN207743368U CN207743368U CN201721891222.2U CN201721891222U CN207743368U CN 207743368 U CN207743368 U CN 207743368U CN 201721891222 U CN201721891222 U CN 201721891222U CN 207743368 U CN207743368 U CN 207743368U
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- microstrip
- dielectric
- dielectric filter
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Abstract
The utility model proposes a kind of microstrip coupled dielectric filter, including N sections of microstrip lines and (N 1) a dielectric resonator, one end of several dielectric resonators is connected between two sections of microstrip lines, the other end ground connection of several dielectric resonators, wherein N >=3.The utility model by microstrip lines mode by substituting conventional capacitance or inductive coupling mode, it solves in high band, conventional air core inductor be difficult or can not coiling the problem of, the parameters such as the width by adjusting the dielectric constant of the medium substrate of microstrip line, thickness and microstrip line conductor realize the different coefficients of coup, to improve the performance of product.
Description
Technical field
The utility model is related to filter fields, more particularly, to a kind of microstrip coupled dielectric filter.
Background technology
Conventional dielectric filter is mostly coupled by the way of capacitance or inductance, and coupling amount is larger.For high frequency
Section (3GHz or 3GHz or more), conventional inductive coupled modes, it is difficult to can not using air core inductor due to its inductance value very little
Coiling, while there is also the parasitic capacitance effects of pad, and the performance of product is caused to cannot achieve.
Microstrip line is the microwave transmission line being made of the plain conductor band propped up on dielectric substrate, is suitble to making microwave integrated
The planar structure transmission line of circuit；Microstrip line is with small, light-weight, service band is wide, reliability is high low with manufacturing cost
The advantages of, and the characteristic impedance of microstrip line and the dielectric constant E of substrater, the thickness H of substrate it is related with the line width w of microstrip line, therefore
By adjusting these parameters, the selection to microstrip line characteristic impedance may be implemented.
Invention content
The utility model proposes a kind of microstrip coupled dielectric filters, solve the medium filter of conventional inductive coupled modes
Wave device in high band, due to its inductance value is smaller and be difficult or can not coiling the problem of, the main contents of the utility model include：
A kind of microstrip coupled dielectric filter, including N sections of microstrip lines and (N-1) a dielectric resonator, several media
One end of resonator is connected between two sections of microstrip lines, the other end ground connection of several dielectric resonators, wherein N >=3.
Preferably, the width of arbitrary two sections of microstrip lines is identical or different with length.
Preferably, the medium substrate of the N sections of microstrip lines is high frequency substrate.
Preferably, the dielectric resonator is half wavelength dielectric filter.
Preferably, the material of the dielectric filter is ceramics.
The beneficial effects of the utility model are：Microstrip lines mode by being substituted conventional inductance by the utility model
Coupled modes, solve the problem of be difficult in the conventional air core inductor of high band or can not coiling, by adjusting Jie of microstrip line
The parameters such as the width of the dielectric constant of matter substrate, thickness and microstrip line conductor realize the different coefficients of coup, to improve production
The performance of product.
Description of the drawings
Fig. 1 is the structural schematic diagram of the dielectric resonator of conventional inductive coupling；
Fig. 2 is the simulation curve figure of the dielectric resonator of conventional inductive coupling；
Fig. 3 is the structural schematic diagram of the microstrip coupled dielectric filter of the utility model；
Fig. 4 is the simulation curve figure of the microstrip coupled dielectric filter of the utility model.
Specific implementation mode
The technical solution protected to the utility model below in conjunction with attached drawing illustrates.
Please refer to Fig. 1 to Fig. 4.The utility model proposes a kind of microstrip coupled dielectric filter, including N sections of microstrip lines and
(N-1) one end of a dielectric resonator, the dielectric resonator is connected between two sections of microstrip lines, other end ground connection, at this
In embodiment, the microstrip line has 3 sections, and the number of the dielectric resonator is 2, one end be connected to two sections of microstrip lines it
Between, other end ground connection, in actual design, the width and length of the microstrip line conductor can be the same or different, described
The medium substrate of microstrip line is Rogers's high frequency substrate, and for Q values between 350 to 500, the dielectric resonator is half
The dielectric resonator of wavelength, material are selected as ceramic material.
Fig. 1 is the structure chart of the dielectric filter of conventional inductive coupling, and Fig. 2 and Fig. 4 are respectively Jie of conventional inductive coupling
The simulation result diagram of matter filter and the microstrip coupled filter of the utility model；Every input parameter of Fig. 4 simulation results is as follows：
The length of first segment S1 and third section S3 microstrip lines is 5.35mm, and the width of three sections of microstrip lines is 0.5mm, second segment microstrip line S2
Length be 10.2mm；Using identical dielectric filter, and it is identical in frequency and bandwidth, conventional inductive coupling
The inductance value of inductance L1 in dielectric filter is 1.75nH, and the inductance value of L2 is 3.68nH, wherein the inductance value of inductance L1
It needs to reach 1.75nH, by calculating it is found that inductance L1 needs to use 0.35mm diameter lines, internal diameter is in 1.0mm, 0.7 circle of coiling,
It is obvious that can not coiling；And use the microstrip coupled mode of the utility model, it is only necessary to by the micro-strip of first segment and third section
The Design of length of line is 5.35mm, and the line width 0.5mm of three sections of microstrip lines can both realize identical frequency and bandwidth, and this
Size is easily done.
The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas are equally included in the patent within the scope of the utility model.
Claims (5)
1. a kind of microstrip coupled dielectric filter, which is characterized in that several including N sections of microstrip lines and (N-1) a dielectric resonator
One end of the dielectric resonator is connected between two sections of microstrip lines, the other end ground connection of several dielectric resonators,
Wherein N >=3.
2. a kind of microstrip coupled dielectric filter according to claim 1, which is characterized in that arbitrary two sections of microstrip lines
Width it is identical or different with length.
3. a kind of microstrip coupled dielectric filter according to claim 1, which is characterized in that Jie of the N sections of microstrip lines
Matter substrate is high frequency substrate.
4. a kind of microstrip coupled dielectric filter according to claim 1, which is characterized in that the dielectric resonator is two
/ mono- wavelength dielectric filter.
5. a kind of microstrip coupled dielectric filter according to claim 1, which is characterized in that the material of the dielectric filter
Matter is ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721891222.2U CN207743368U (en) | 2017-12-29 | 2017-12-29 | A kind of microstrip coupled dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721891222.2U CN207743368U (en) | 2017-12-29 | 2017-12-29 | A kind of microstrip coupled dielectric filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207743368U true CN207743368U (en) | 2018-08-17 |
Family
ID=63120703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721891222.2U Expired - Fee Related CN207743368U (en) | 2017-12-29 | 2017-12-29 | A kind of microstrip coupled dielectric filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207743368U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029694A (en) * | 2019-12-09 | 2020-04-17 | 瑞声科技(新加坡)有限公司 | Microstrip filter |
-
2017
- 2017-12-29 CN CN201721891222.2U patent/CN207743368U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029694A (en) * | 2019-12-09 | 2020-04-17 | 瑞声科技(新加坡)有限公司 | Microstrip filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180817 Termination date: 20211229 |