CN204167447U - Symmetrical expression dual U-shaped I-shaped fluting band pass filter - Google Patents
Symmetrical expression dual U-shaped I-shaped fluting band pass filter Download PDFInfo
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- CN204167447U CN204167447U CN201420683366.9U CN201420683366U CN204167447U CN 204167447 U CN204167447 U CN 204167447U CN 201420683366 U CN201420683366 U CN 201420683366U CN 204167447 U CN204167447 U CN 204167447U
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Abstract
The utility model discloses a kind of symmetrical expression dual U-shaped I-shaped fluting band pass filter.It comprises substrate, input transmission line, left U-shaped microstrip line, intermediate rectangular microstrip line, and right U-shaped microstrip line, exports transmission line, ground plate; Upper surface of base plate is provided with input transmission line, left U-shaped microstrip line, intermediate rectangular microstrip line, right U-shaped microstrip line, exports transmission line, the left end of left U-shaped microstrip line is connected with the right-hand member of input transmission line, the right-hand member of right U-shaped microstrip line is connected with the left end exporting transmission line, and intermediate rectangular microstrip line is nested in the middle of left U-shaped microstrip line and right U-shaped microstrip line; Base lower surface is provided with ground plate; Ground plate is provided with the I-shaped fluting of left I-shaped fluting and the right side.It is good that the utility model has filtering performance, and insertion loss is low, and structure is simple, and size is little, easy to make, is convenient to the advantages such as integrated.
Description
Technical field
The utility model relates to filter, particularly relates to a kind of symmetrical expression dual U-shaped I-shaped fluting band pass filter.
Background technology
Along with the develop rapidly of the radiotechnics such as Radar Technology and radio communication, microwave radio Circuits and Systems are paid attention to more and more widely.Microwave filter is one of important component part wherein, and the quality of its performance largely determines the work quality of system.The system of various function is developed in succession, and microwave spectrum resource day is becoming tight, and frequency interval constantly reduces, and this just has higher requirement to filter.Wherein microstrip filter has superior performance with it, size is little, the design cycle is short, be easy to integrated, be easy to the advantages such as processing by photoetching technique is widely used.
Ground defective structure is a kind of a kind of structure etching cycle or aperiodic shape on the metal ground plate of the transmission lines such as micro-band, co-planar waveguide.DGS structure leads to overetched grid shape to affect the effective dielectric constant distribution of circuitry substrate, thus the distributed capacitance changed based on transmission line on this medium and distributed inductance, make this transmission line have slow wave characteristic and band gap properties.The slow wave characteristic of DGS structure can be used for effectively reducing the size of microwave circuit, and the band gap properties that it possesses can be used for improving the sideband suppression of BPF, therefore loads the performance that DGS unit can well improve microwave planar circuit.Just because of DGS structure, there is these special performances, make it obtain general application in the field such as microwave circuit, antenna, receive the concern of a lot of scholar, become the emphasis of Recent study.
Summary of the invention
The utility model provides a kind of symmetrical expression dual U-shaped I-shaped fluting band pass filter, and technical scheme is as follows:
Symmetrical expression dual U-shaped I-shaped fluting band pass filter comprises substrate, input transmission line, left U-shaped microstrip line, intermediate rectangular microstrip line, and right U-shaped microstrip line, exports transmission line, ground plate; Upper surface of base plate is provided with input transmission line, left U-shaped microstrip line, intermediate rectangular microstrip line, right U-shaped microstrip line, exports transmission line, the left end of left U-shaped microstrip line is connected with the right-hand member of input transmission line, the right-hand member of right U-shaped microstrip line is connected with the left end exporting transmission line, and intermediate rectangular microstrip line is nested in the middle of left U-shaped microstrip line and right U-shaped microstrip line; Base lower surface is provided with ground plate; Ground plate is provided with the I-shaped fluting of left I-shaped fluting and the right side.
Described substrate is glass-epoxy material, and length is 28mm ~ 32mm, and width is 24mm ~ 28mm.Described input transmission line is identical with the shape size exporting transmission line, and length is 4mm ~ 6mm, and width is 1mm ~ 3mm.Described left U-shaped microstrip line is identical with the shape size of right U-shaped microstrip line, be made up of two transverse moment shaped microstrip lines and a longitudinal moment shaped microstrip line, transverse moment shaped microstrip line length is 7mm ~ 9mm, longitudinal moment shaped microstrip line length is 5mm ~ 7mm, and the width of transverse moment shaped microstrip line and longitudinal moment shaped microstrip line is 0.5mm ~ 1.5mm.Described intermediate rectangular microstrip line length is 11mm ~ 13mm, width is 2mm ~ 4mm, and be 0.4mm ~ 0.6mm with the transverse moment shaped microstrip linear distance of left U-shaped microstrip line and right U-shaped microstrip line, be 2mm ~ 4mm with the longitudinal moment shaped microstrip linear distance of left U-shaped microstrip line and right U-shaped microstrip line.The length of described ground plate is 28mm ~ 32mm, and width is 24mm ~ 28mm.The I-shaped fluting in a described left side is identical with the right side I-shaped fluting shape size, form by two horizontal rectangular slot and a longitudinal rectangular slot, horizontal rectangle slotting length is 8mm ~ 10mm, longitudinal rectangle slotting length is 5mm ~ 7mm, horizontal rectangular slot and longitudinal rectangle groove width are 0.5mm ~ 1.5mm, and the I-shaped fluting of left I-shaped fluting and the right side is spaced apart 1mm ~ 3mm.
It is good that the utility model has filtering performance, and insertion loss is low, and structure is simple, and size is little, easy to make, is convenient to the advantages such as integrated.
Accompanying drawing explanation
Fig. 1 is the Facad structure figure of symmetrical expression dual U-shaped I-shaped fluting band pass filter;
Fig. 2 is the structure figure of symmetrical expression dual U-shaped I-shaped fluting band pass filter;
Fig. 3 is the performance chart of symmetrical expression dual U-shaped I-shaped fluting band pass filter;
Fig. 4 is the Surface current distribution figure of filter when 4.35GHz;
Fig. 5 is the Surface current distribution figure of filter when 5.34GHz;
Fig. 6 is the Surface current distribution figure of filter when 7.22GHz.
Embodiment
As shown in Fig. 1 ~ 2, symmetrical expression dual U-shaped I-shaped fluting band pass filter comprises substrate 1, input transmission line 2, left U-shaped microstrip line 3, intermediate rectangular microstrip line 4, and right U-shaped microstrip line 5, exports transmission line 6, ground plate 7; Substrate 1 upper surface is provided with input transmission line 2, left U-shaped microstrip line 3, intermediate rectangular microstrip line 4, right U-shaped microstrip line 5, exports transmission line 6, the left end of left U-shaped microstrip line 3 is connected with the right-hand member of input transmission line 2, the right-hand member of right U-shaped microstrip line 5 is connected with the left end exporting transmission line 6, and intermediate rectangular microstrip line 4 is nested in the middle of left U-shaped microstrip line 3 and right U-shaped microstrip line 5; Substrate 1 lower surface is provided with ground plate 7; Ground plate 7 is provided with the I-shaped fluting 9 of left I-shaped fluting 8 and the right side.
Described substrate 1 is glass-epoxy material, and length is 28mm ~ 32mm, and width is 24mm ~ 28mm.Described input transmission line 2 is identical with the shape size exporting transmission line 6, and length is 4mm ~ 6mm, and width is 1mm ~ 3mm.Described left U-shaped microstrip line 3 is identical with the shape size of right U-shaped microstrip line 5, be made up of two transverse moment shaped microstrip lines and a longitudinal moment shaped microstrip line, transverse moment shaped microstrip line length is 7mm ~ 9mm, longitudinal moment shaped microstrip line length is 5mm ~ 7mm, and the width of transverse moment shaped microstrip line and longitudinal moment shaped microstrip line is 0.5mm ~ 1.5mm.Described intermediate rectangular microstrip line 4 length is 11mm ~ 13mm, width is 2mm ~ 4mm, and be 0.4mm ~ 0.6mm with the transverse moment shaped microstrip linear distance of left U-shaped microstrip line 3 and right U-shaped microstrip line 5, be 2mm ~ 4mm with the longitudinal moment shaped microstrip linear distance of left U-shaped microstrip line 3 and right U-shaped microstrip line 5.The length of described ground plate 7 is 28mm ~ 32mm, and width is 24mm ~ 28mm.The I-shaped fluting in a described left side 8 is identical with the right side I-shaped fluting 9 shape size, form by two horizontal rectangular slot and a longitudinal rectangular slot, horizontal rectangle slotting length is 8mm ~ 10mm, longitudinal rectangle slotting length is 5mm ~ 7mm, horizontal rectangular slot and longitudinal rectangle groove width are 0.5mm ~ 1.5mm, and the I-shaped fluting 9 of left I-shaped fluting 8 and the right side is spaced apart 1mm ~ 3mm.
Embodiment 1
Symmetrical expression dual U-shaped I-shaped fluting band pass filter:
Substrate is glass-epoxy material, and length is 30mm, and width is 26mm.Input transmission line is identical with the shape size exporting transmission line, and length is 5mm, and width is 2mm.Left U-shaped microstrip line is identical with the shape size of right U-shaped microstrip line, be made up of two transverse moment shaped microstrip lines and a longitudinal moment shaped microstrip line, transverse moment shaped microstrip line length is 8mm, longitudinal moment shaped microstrip line length is 6mm, and the width of transverse moment shaped microstrip line and longitudinal moment shaped microstrip line is 1mm.Intermediate rectangular microstrip line length is 12mm, and width is 3mm.The length of ground plate is 30mm, and width is 26mm, and is 0.5mm with the transverse moment shaped microstrip linear distance of left U-shaped microstrip line and right U-shaped microstrip line, is 3mm with the longitudinal moment shaped microstrip linear distance of left U-shaped microstrip line and right U-shaped microstrip line.Left I-shaped fluting is identical with the right side I-shaped fluting shape size, form by two horizontal rectangular slot and a longitudinal rectangular slot, horizontal rectangle slotting length is 9mm, longitudinal rectangle slotting length is 6mm, horizontal rectangular slot and longitudinal rectangle groove width are 1mm, and the I-shaped fluting of left I-shaped fluting and the right side is spaced apart 2mm.The property indices of symmetrical expression dual U-shaped I-shaped fluting band pass filter adopts CST software to test, and the performance curve of gained filter as shown in Figure 3.As seen from the figure, 3dB pass band width scope is 4GHz ~ 5.68GHz, 7.05GHz ~ 7.55GHz.Within the scope of these pass band widths, insertion loss is little, and return loss is large, and this illustrates that filter has excellent bandpass filtering performance.The Surface current distribution of filter when 4.35GHz, 5.34GHz and 7.22GHz respectively as shown in Figure 4, Figure 5 and Figure 6.
Claims (7)
1. a symmetrical expression dual U-shaped I-shaped fluting band pass filter, it is characterized in that comprising substrate (1), input transmission line (2), left U-shaped microstrip line (3), intermediate rectangular microstrip line (4), right U-shaped microstrip line (5), exports transmission line (6), ground plate (7); Substrate (1) upper surface is provided with input transmission line (2), left U-shaped microstrip line (3), intermediate rectangular microstrip line (4), right U-shaped microstrip line (5), exports transmission line (6), the left end of left U-shaped microstrip line (3) is connected with the right-hand member of input transmission line (2), the right-hand member of right U-shaped microstrip line (5) is connected with the left end exporting transmission line (6), and intermediate rectangular microstrip line (4) is nested in the middle of left U-shaped microstrip line (3) and right U-shaped microstrip line (5); Substrate (1) lower surface is provided with ground plate (7); Ground plate (7) is provided with left I-shaped fluting (8) and the I-shaped fluting in the right side (9).
2. a kind of symmetrical expression dual U-shaped I-shaped fluting band pass filter as claimed in claim 1, it is characterized in that described substrate (1) is glass-epoxy material, the length of substrate (1) is 28mm ~ 32mm, and width is 24mm ~ 28mm.
3. a kind of symmetrical expression dual U-shaped I-shaped fluting band pass filter as claimed in claim 1, it is characterized in that described input transmission line (2) is identical with the shape size exporting transmission line (6), length is 4mm ~ 6mm, and width is 1mm ~ 3mm.
4. a kind of symmetrical expression dual U-shaped I-shaped fluting band pass filter as claimed in claim 1, it is characterized in that described left U-shaped microstrip line (3) is identical with the shape size of right U-shaped microstrip line (5), be made up of two transverse moment shaped microstrip lines and a longitudinal moment shaped microstrip line, transverse moment shaped microstrip line length is 7mm ~ 9mm, longitudinal moment shaped microstrip line length is 5mm ~ 7mm, and the width of transverse moment shaped microstrip line and longitudinal moment shaped microstrip line is 0.5mm ~ 1.5mm.
5. a kind of symmetrical expression dual U-shaped I-shaped fluting band pass filter as claimed in claim 1, it is characterized in that described intermediate rectangular microstrip line (4) length is 11mm ~ 13mm, width is 2mm ~ 4mm, and be 0.4mm ~ 0.6mm with the transverse moment shaped microstrip linear distance of left U-shaped microstrip line (3) and right U-shaped microstrip line (5), be 2mm ~ 4mm with the longitudinal moment shaped microstrip linear distance of left U-shaped microstrip line (3) and right U-shaped microstrip line (5).
6. a kind of symmetrical expression dual U-shaped I-shaped fluting band pass filter as claimed in claim 1, it is characterized in that the length of described ground plate (7) is 28mm ~ 32mm, width is 24mm ~ 28mm.
7. a kind of symmetrical expression dual U-shaped I-shaped fluting band pass filter as claimed in claim 1, it is characterized in that the I-shaped fluting in a described left side (8) is identical with the right side I-shaped fluting (9) shape size, form by two horizontal rectangular slot and a longitudinal rectangular slot, horizontal rectangle slotting length is 8mm ~ 10mm, longitudinal rectangle slotting length is 5mm ~ 7mm, horizontal rectangular slot and longitudinal rectangle groove width are 0.5mm ~ 1.5mm, and left I-shaped fluting (8) and the I-shaped fluting in the right side (9) are spaced apart 1mm ~ 3mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420683366.9U CN204167447U (en) | 2014-11-14 | 2014-11-14 | Symmetrical expression dual U-shaped I-shaped fluting band pass filter |
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| CN201420683366.9U CN204167447U (en) | 2014-11-14 | 2014-11-14 | Symmetrical expression dual U-shaped I-shaped fluting band pass filter |
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| CN204167447U true CN204167447U (en) | 2015-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359393A (en) * | 2017-08-21 | 2017-11-17 | 广西师范大学 | Super wide band microstrip bandpass filter |
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2014
- 2014-11-14 CN CN201420683366.9U patent/CN204167447U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359393A (en) * | 2017-08-21 | 2017-11-17 | 广西师范大学 | Super wide band microstrip bandpass filter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20151114 |
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| EXPY | Termination of patent right or utility model |