CN205882137U - Parallel coupled strip line wave filter - Google Patents
Parallel coupled strip line wave filter Download PDFInfo
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- CN205882137U CN205882137U CN201620753878.7U CN201620753878U CN205882137U CN 205882137 U CN205882137 U CN 205882137U CN 201620753878 U CN201620753878 U CN 201620753878U CN 205882137 U CN205882137 U CN 205882137U
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- wave filter
- coupled miccrostrip
- miccrostrip lines
- strip line
- parallel coupled
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Abstract
The utility model discloses a parallel coupled strip line wave filter, it includes input, output port and multistage parallel coupled strip line, multistage parallel coupled strip line include the parallel coupled strip line of prime, the parallel coupled strip line of last first -order and multistage in the middle of the parallel coupled strip line in rank, the input port one end of being close to the parallel coupled strip line of prime be provided with one section microstrip line of opening a way, the output port one end of being close to the parallel coupled strip line of last first -order be provided with one section same microstrip line of opening a way equally. In the input / output of wave filter and the place that the prime of wave filter / the parallel coupled strip line of last first -order meets, including one section relatively shorter microstrip line of opening a way to adjust the interval of the parallel coupling microstrip of prime / last first -order of wave filter and the standing wave of wave filter, reach the response of expectation.
Description
Technical field
This utility model relates to a kind of Coupled Miccrostrip Lines wave filter.
Background technology
Wave filter is the critical component of many microwave and millimeter wave systems, along with the fast development of Modern Communication System, to tool
Have that volume is little, low cost, be easily integrated and microwave filter that performance is high has urgent demand.At present, parallel coupling is micro-
Stripline filter has been widely used in various microwave circuit, the most on this basis, amplifies again and has developed various deformation
Structure, such as Hair-pin line structure, mixing Hair-pin line structure, divides ring structures, stepped impedance formula structure, in line structure etc., and has
Respective feature, is widely used.The method for designing of microstripline filter also has the biggest change, tradition to use lump
The method for designing of element may not apply to microwave regime, and distributed component method has been widely used in the design of microstripline filter,
And along with the popularization of Frequency Simulation Software, Theoretical Calculation organically combines with computer optimization so that setting of wave filter
Count more and more accurate.
Owing to modern PCB technology is highly developed, machining accuracy is the highest, so can realize micro-in higher frequency band completely
The processing of stripline filter.Its processing cost is relatively low simultaneously, and the volume of product is little, and integrated level is high, the most this wave filter
Large-scale production and application.During traditional method design Coupled Miccrostrip Lines wave filter, if the relative bandwidth of wave filter is wider,
First rank of wave filter and the spacing of last single order Coupled Miccrostrip Lines can be narrow, to such an extent as to obtain be smaller than
0.1mm.The most a wave filter working in 8.75GHz-10.25GHz, use thickness is 0.635mm, and relative dielectric constant is
The medium of 10.2, traditionally designs the structure of the wave filter obtained as it is shown in figure 1, between the first rank coupling line of wave filter
Away from for 0.076mm.Restriction due to PCB processing technique, it is thus achieved that the microstrip line spacing less than 1mm is relatively difficult, even if adding
Work, as the irregular of microstrip line edge causes bigger mismachining tolerance so that the concordance of wave filter is poor.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of Coupled Miccrostrip Lines wave filter,
In the place that the input/outfan of wave filter connects with the first rank of wave filter/last single order Coupled Miccrostrip Lines, add
One section of comparatively short open circuit microstrip line, to regulate spacing and the filtering of the first rank/last single order parallel coupling micro-strip of wave filter
The standing wave of device, reaches desired response.
The purpose of this utility model is achieved through the following technical solutions: Coupled Miccrostrip Lines wave filter, its bag
Including input, output port and multistage Coupled Miccrostrip Lines, multistage Coupled Miccrostrip Lines includes the first rank parallel coupling micro-strip
Line, last single order Coupled Miccrostrip Lines and multistage scala media Coupled Miccrostrip Lines, described input port is near the first rank
One end of Coupled Miccrostrip Lines is provided with one section of open circuit microstrip line, and described output port is micro-near last single order parallel coupling
One end of band wire is again provided with one section of same open circuit microstrip line.
The size of described open circuit microstrip line is L3=0.41mm, W3=0.59mm.
The first described rank Coupled Miccrostrip Lines and last single order Coupled Miccrostrip Lines equivalently-sized, size is equal
For: L1=2.87mm, W1=0.48mm.
Two microstrip line spacing of the first described rank Coupled Miccrostrip Lines and the two of last single order Coupled Miccrostrip Lines
The spacing of microstrip line is identical, is 0.15mm.
The size of the scala media Coupled Miccrostrip Lines of described wave filter is L2=2.8mm, W2=0.59mm.
The beneficial effects of the utility model are: this utility model provides a kind of Coupled Miccrostrip Lines wave filter, in filter
The place that the input/outfan of ripple device connects with the first rank of wave filter/last single order Coupled Miccrostrip Lines, adds the preceding paragraph
Comparatively short open circuit microstrip line, to regulate the spacing of the first rank of wave filter/last single order parallel coupling micro-strip and wave filter
Standing wave, reaches desired response.The short open circuit microstrip line added is equivalent to be incorporated with one at the input and output side of wave filter
Individual electric capacity, this electric capacity forms tuning circuit with first of wave filter and the equivalent inductance of last resonator cavity, and this makes to increase
Add the flexible design degree of wave filter.By length and the parameter of remaining coupling line of regulation open circuit microstrip line, it is easy to obtain
The wave filter response wanted.
Accompanying drawing explanation
Fig. 1 is the filter schematic traditionally designed；
Fig. 2 is the filter schematic of the present invention；
Fig. 3 is the wave filter simth circle diagram of the present invention；
Fig. 4 is the wave filter simulation result figure of the present invention.
Detailed description of the invention
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings, but protection domain of the present utility model
It is not limited to the following stated.
As in figure 2 it is shown, Coupled Miccrostrip Lines wave filter, it includes input, output port and multistage parallel coupling micro-strip
Line, multistage Coupled Miccrostrip Lines include the first rank Coupled Miccrostrip Lines, last single order Coupled Miccrostrip Lines and multistage in
Between rank Coupled Miccrostrip Lines, described input port is provided with one section of open circuit near one end of the first rank Coupled Miccrostrip Lines
Microstrip line, described output port is again provided with one section of same open circuit near one end of last single order Coupled Miccrostrip Lines
Microstrip line.
The size of described open circuit microstrip line is L3=0.41mm, W3=0.59mm.
The first described rank Coupled Miccrostrip Lines and last single order Coupled Miccrostrip Lines equivalently-sized, size is equal
For: L1=2.87mm, W1=0.48mm.
Two microstrip line spacing of the first described rank Coupled Miccrostrip Lines and the two of last single order Coupled Miccrostrip Lines
The spacing of microstrip line is identical, is 0.15mm.
The size of the scala media Coupled Miccrostrip Lines of described wave filter is L2=2.8mm, W2=0.59mm.
As shown in Figure 3-4, it can be seen that simulation result is sufficiently close to the response of tradition coupled line filter, but passes through
Adding open circuit microstrip line, the spacing of the first rank and last single order coupled microstrip line is 0.15mm, and the structure of wave filter becomes to hold very much
Easy-to-use PCB technology realizes, and the requirement to technique greatly reduces.
Claims (5)
1. Coupled Miccrostrip Lines wave filter, it includes input, output port and multistage Coupled Miccrostrip Lines, and its feature exists
In: multistage Coupled Miccrostrip Lines include the first rank Coupled Miccrostrip Lines, last single order Coupled Miccrostrip Lines and multistage in
Between rank Coupled Miccrostrip Lines, described input port is provided with one section of open circuit near one end of the first rank Coupled Miccrostrip Lines
Microstrip line, described output port is again provided with one section of same open circuit near one end of last single order Coupled Miccrostrip Lines
Microstrip line.
Coupled Miccrostrip Lines wave filter the most according to claim 1, it is characterised in that: the chi of described open circuit microstrip line
Very little for L3=0.41mm, W3=0.59mm.
Coupled Miccrostrip Lines wave filter the most according to claim 1, it is characterised in that: the first described rank parallel coupling
Microstrip line and last single order Coupled Miccrostrip Lines equivalently-sized, size is: L1=2.87mm, W1=0.48mm.
Coupled Miccrostrip Lines wave filter the most according to claim 3, it is characterised in that: the first described rank parallel coupling
Two microstrip line spacing of microstrip line are identical with the spacing of two microstrip lines of last single order Coupled Miccrostrip Lines, are 0.15mm.
Coupled Miccrostrip Lines wave filter the most according to claim 1, it is characterised in that: the scala media of described wave filter
The size of Coupled Miccrostrip Lines is L2=2.8mm, W2=0.59mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620753878.7U CN205882137U (en) | 2016-07-18 | 2016-07-18 | Parallel coupled strip line wave filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620753878.7U CN205882137U (en) | 2016-07-18 | 2016-07-18 | Parallel coupled strip line wave filter |
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| Publication Number | Publication Date |
|---|---|
| CN205882137U true CN205882137U (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620753878.7U Active CN205882137U (en) | 2016-07-18 | 2016-07-18 | Parallel coupled strip line wave filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029695A (en) * | 2019-12-11 | 2020-04-17 | 重庆邮电大学 | Folding parallel coupling microstrip filter with fractal structure |
| CN115799781A (en) * | 2022-11-16 | 2023-03-14 | 宜确半导体（苏州）有限公司 | Coupling line band-pass filter |
-
2016
- 2016-07-18 CN CN201620753878.7U patent/CN205882137U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029695A (en) * | 2019-12-11 | 2020-04-17 | 重庆邮电大学 | Folding parallel coupling microstrip filter with fractal structure |
| CN115799781A (en) * | 2022-11-16 | 2023-03-14 | 宜确半导体（苏州）有限公司 | Coupling line band-pass filter |
| CN115799781B (en) * | 2022-11-16 | 2024-02-02 | 宜确半导体（苏州）有限公司 | Coupled line band-pass filter |
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