CN204303953U - A kind of tunable microstrip filter - Google Patents
A kind of tunable microstrip filter Download PDFInfo
- Publication number
- CN204303953U CN204303953U CN201520015579.9U CN201520015579U CN204303953U CN 204303953 U CN204303953 U CN 204303953U CN 201520015579 U CN201520015579 U CN 201520015579U CN 204303953 U CN204303953 U CN 204303953U
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- China
- Prior art keywords
- transmission line
- housing
- contact pin
- microstrip
- output port
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Abstract
The utility model discloses a kind of tunable microstrip filter, comprise the housing of cuboid, containing inner chamber in described housing, the top of housing is provided with cover plate, in housing cavity, level installs a rectangular substrate, two sides that substrate is longer are respectively equipped with microstrip transmission line, article two, microstrip transmission line is parallel to each other, the two ends of housing install input port contact pin and output port contact pin respectively, the position of described substrate between two microstrip transmission lines installs two 1/4 wavelength open lines side by side, article two, 1/4 wavelength open line is interspersed, article two, the end points that 1/4 wavelength open line is positioned at the same side couples together respectively by input port transmission line and output port transmission line, and input port transmission line is positioned at one end of input port contact pin, output port transmission line is positioned at one end of output port contact pin, the utility model can reduce wave filter volume, shorten process time, allotment is convenient and stable.
Description
Technical field
The utility model relates to a kind of Microwave transmission technology, particularly the tunable microstrip filter of one.
Background technology
Microstrip line system is a kind of common microwave transmission system, its structure comprises the signals layer of top layer, interlayer substrate and bottom layer ground face, and signals layer and ground plane are made up of metal material usually, can be metal forming or washing layer, signals layer be also referred to as microstrip line.According to different circuit functions, microstrip line shape is had nothing in common with each other, modal is rectangular strip (also referred to as rectangular strip microstrip line), as various transmission line, coupling line, short-circuit line, open-circuit line etc., as conventional λ/4 open-circuit line (1/4 wavelength open line), λ/2 short-circuit line etc. (λ is the wavelength of microwave in microstrip line system).These microstrip lines can form the microwave components such as resonator, coupler, wave filter.The physical dimension of microstrip line is different, and its distributed constant is also different.Under prior art condition, each simulation result frequency can lower than the frequency of the wave filter of reality processing, especially very large in the small-sized mismachining tolerance of high frequency band, thus could finally determine filter construction size at needs many experiments, need a large amount of expenses and time, wave filter in inevitable mismachining tolerance after processing needs debugging, needs the damage that can cause metal forming by cutting out open-circuit line like this in debug process.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of tunable microstrip filter, and this wave filter volume is little, and process time is short, and allotment is convenient.
For achieving the above object, the utility model provides following technical scheme: a kind of tunable microstrip filter, comprise the housing of cuboid, containing inner chamber in described housing, the top of housing is provided with cover plate, in housing cavity, level installs a rectangular substrate, two sides that substrate is longer are respectively equipped with microstrip transmission line, article two, microstrip transmission line is parallel to each other, the two ends of housing install input port contact pin and output port contact pin respectively, the position of described substrate between two microstrip transmission lines installs two 1/4 wavelength open lines side by side, article two, 1/4 wavelength open line is interspersed, article two, the end points that 1/4 wavelength open line is positioned at the same side couples together respectively by input port transmission line and output port transmission line, and input port transmission line is positioned at one end of input port contact pin, output port transmission line is positioned at one end of output port contact pin.
Preferably, cover plate is installed some tuning screws.
Preferably, cover plate is connected with housing by trip bolt.
Adopt technique scheme, by installing two 1/4 wavelength open lines on substrate side by side, and two 1/4 wavelength open lines are interspersed, compared with existing wave filter, when wave filter 1/4 wavelength open line open circuit quantity is equal, then the exponent number of the utility model wave filter adds one times, and keeps overall volume constant; When the exponent number of wave filter is consistent, then the volume of the utility model wave filter is the half of original volume.The utility model can reduce wave filter volume, shortens process time, and allotment is convenient and stable.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model board structure schematic diagram;
Fig. 3 is the utility model substrate assembling schematic diagram;
Wherein, 1. housing 2. cover plate 3. substrate 4. microstrip transmission line 5. input port contact pin 6. output port contact pin 7.1/4 wavelength open line 8. input port transmission line 9. output port transmission line 10. tuning screw.
Detailed description of the invention
Below in conjunction with accompanying drawing, by the description to embodiment, the utility model is described further:
As Fig. 1, shown in 2 and 3, a kind of tunable microstrip filter of the utility model, comprise the housing 1 of cuboid, containing inner chamber in housing 1, the top of housing 1 is provided with cover plate 2, cover plate 2 is connected with housing 1 by trip bolt, cover plate 2 is installed row's tuning screw 10, and pass through fastening nuts, the bottom of tuning screw 10 extends in the inner chamber of housing 1, in housing 1 inner chamber, level installs a rectangular substrate 3, two sides that substrate 3 is longer fixedly mount microstrip transmission line 4 respectively, article two, microstrip transmission line 4 is parallel to each other, the two ends of housing 1 install input port contact pin 5 and output port contact pin 6 respectively, the position of substrate 3 between two microstrip transmission lines 4 installs two 1/4 wavelength open lines 7 side by side, article two, 1/4 wavelength open line 7 is interspersed, article two, the end points that 1/4 wavelength open line 7 is positioned at the same side couples together respectively by input port transmission line 8 and output port transmission line 9, and input port transmission line 8 is positioned at one end of input port contact pin 5, output port transmission line 9 is positioned at one end of output port contact pin 6.
After the utility model installation, two microstrip transmission lines 4 by the cavity grounding connection of the hole on microstrip transmission line 4 and housing 1, and are allocated, in order to screen required frequency band by tuning screw 10 pairs of wave filters.
The utility model is by installing two 1/4 wavelength open lines 7 side by side on the substrate 3, and two 1/4 wavelength open lines 7 are interspersed, compared with existing wave filter, wave filter 1/4 wavelength open line 7 open a way quantity equal time, the exponent number of the utility model wave filter adds one times, and keeps constancy of volume; When the exponent number of wave filter is consistent, the volume of the utility model wave filter is the half of original volume.The utility model can reduce wave filter volume, shortens process time, and allotment is convenient and stable.
The utility model is connected by trip bolt with housing 1 due to cover plate 2, thus can also remove cover plate 2 when needs change substrate 3 structure, take out substrate 3 in order to convenient.
Above-described is only preferred embodiment of the present utility model; it should be pointed out that for the person of ordinary skill of the art, under the prerequisite not departing from the utility model creation design; can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (3)
1. a tunable microstrip filter, comprise the housing (1) of cuboid, containing inner chamber in described housing (1), the top of housing (1) is provided with cover plate (2), in housing (1) inner chamber, level installs a rectangular substrate (3), two sides that substrate (3) is longer are respectively equipped with microstrip transmission line (4), article two, microstrip transmission line (4) is parallel to each other, the two ends of housing (1) install input port contact pin (5) and output port contact pin (6) respectively, it is characterized in that: the position of described substrate (3) between two microstrip transmission lines (4) installs two 1/4 wavelength open lines (7) side by side, article two, 1/4 wavelength open line (7) is interspersed, article two, the end points that 1/4 wavelength open line (7) is positioned at the same side couples together respectively by input port transmission line (8) and output port transmission line (9), and input port transmission line (8) is positioned at one end of input port contact pin (5), output port transmission line (9) is positioned at one end of output port contact pin (6).
2. tunable microstrip filter according to claim 1, is characterized in that: described cover plate (2) is upper installs some tuning screws (10).
3. tunable microstrip filter according to claim 2, is characterized in that: described cover plate (2) is connected with housing (1) by trip bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520015579.9U CN204303953U (en) | 2015-01-09 | 2015-01-09 | A kind of tunable microstrip filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520015579.9U CN204303953U (en) | 2015-01-09 | 2015-01-09 | A kind of tunable microstrip filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204303953U true CN204303953U (en) | 2015-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520015579.9U Expired - Fee Related CN204303953U (en) | 2015-01-09 | 2015-01-09 | A kind of tunable microstrip filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204303953U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107403984A (en) * | 2017-07-14 | 2017-11-28 | 成都九洲迪飞科技有限责任公司 | Suspend the high suppression high-pass filter of micro-strip |
| CN109167132A (en) * | 2018-08-31 | 2019-01-08 | 苏州市江海通讯发展实业有限公司 | A kind of embedded cavity body filter of micro-strip interface |
| CN113394528A (en) * | 2021-06-21 | 2021-09-14 | 中航光电科技股份有限公司 | Microstrip filter with ground-lacking structure |
-
2015
- 2015-01-09 CN CN201520015579.9U patent/CN204303953U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107403984A (en) * | 2017-07-14 | 2017-11-28 | 成都九洲迪飞科技有限责任公司 | Suspend the high suppression high-pass filter of micro-strip |
| CN109167132A (en) * | 2018-08-31 | 2019-01-08 | 苏州市江海通讯发展实业有限公司 | A kind of embedded cavity body filter of micro-strip interface |
| CN113394528A (en) * | 2021-06-21 | 2021-09-14 | 中航光电科技股份有限公司 | Microstrip filter with ground-lacking structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150429 Termination date: 20160109 |