CN105070992A - Wide-bandpass stop-band filter - Google Patents
Wide-bandpass stop-band filter Download PDFInfo
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- CN105070992A CN105070992A CN201510508389.5A CN201510508389A CN105070992A CN 105070992 A CN105070992 A CN 105070992A CN 201510508389 A CN201510508389 A CN 201510508389A CN 105070992 A CN105070992 A CN 105070992A
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- 238000010168 coupling process Methods 0.000 claims abstract description 30
- 238000005859 coupling reaction Methods 0.000 claims abstract description 30
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 13
- 230000005764 inhibitory process Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 description 2
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- 230000004069 differentiation Effects 0.000 description 1
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Abstract
The invention discloses a wide-bandpass stop-band filter, and solves problems that a conventional stop-band filter is large in size, is narrow in bandpass width, is poor in near-end inhibition, and is poor in frequency response characteristic. The interior of an axial groove (1) is provided with a broadband micro-strip matched line (6), wherein the left and right ends of the broadband micro-strip matched line (6) are respectively connected with a first SMA connector (2) and a second SMA connector (2). A side of the axial groove (1) is provided with a plurality of axially-arranged coaxial high-Q resonant cavities, and the axial groove (1) is communicated with the plurality of axially-arranged coaxial high-Q resonant cavities. The interior of each of the plurality of axially-arranged coaxial high-Q resonant cavities is provided with a coaxial high-Q resonant rod (3). The broadband micro-strip matched line (6) is a linear micro-strip transmission line, and is connected with one end of each of a plurality of resonator capacity coupling pieces (5). The other end of each of the plurality of resonator capacity coupling pieces (5) is connected to the corresponding coaxial high-Q resonant rod (3). A micro-grid line cover plate (9) is disposed on the axial groove (1) and seals the axial groove (1). A micro-grid line capacity coupling piece (4) is located below the resonator capacity coupling pieces (5), and is connected to the coaxial high-Q resonant rods (3). The coaxial high-Q resonant rods (3) are fixed in the coaxial high-Q resonant cavities through resonant rod fixing screws (7), thereby forming a coaxial capacity coupling near-end frequency attenuation unit evolved from a coaxial Chebyshev model. A resonator upper cover plate (10) above the coaxial high-Q resonant cavities is fixed through a cover plate fixing screw (11).
Description
technical field:
The present invention is relevant with stop-band filter.
background technology:
Conventional stop-band filter small product size is large, and pass band width is narrow, near-end suppresses low, frequency response characteristic is low.The requirement of the wider signal transacting of communications band and multi signal treatment system can not be met completely.Passband DC ~ 5000MHz can not be met.
summary of the invention:
The object of this invention is to provide a kind of pass band width wide, near-end blanketing frequency is near, the broad passband stop-band filter that volume is little.
The present invention is achieved in that
By axial groove 1, first, two SMA connectors 2, wideband microband matched line 6, coaxial high Q resonant cavity, coaxial high Q resonant rod 3, microstrip line capacitive coupling sheet 4, resonator capacitor coupling piece 5, resonant rod hold-down screw 7, microstrip line hold-down screw 8, microstrip line upper cover plate 9, resonator upper cover plate 10, cover screw 11 forms, in axial groove 1, wideband microband matched line 6 is installed, it is left, right two ends connect first, two SMA connectors 2, there is the coaxial high Q resonant cavity of some axially-aligned the side of axial groove 1, axial groove 1 communicates with some coaxial high Q resonant cavities, coaxial high Q resonant rod 3 is had in coaxial high Q resonant cavity, wideband microband matched line 6 is linear microstrip transmission line, wideband microband matched line 6 is connected with one end of some resonator capacitor coupling pieces 5, the other end of resonator capacitor coupling piece 5 is connected on coaxial high Q resonant rod 3, axial groove 1 has microstrip line cover plate 9 to close above, microstrip line capacitive coupling sheet 4 is positioned at below resonator capacitor coupling piece 5 and is connected on coaxial high Q resonant rod 3, coaxial high Q resonant rod 3 is fixed in coaxial high Q resonant cavity by resonant rod hold-down screw 7, form the coaxial capacitance coupling near-end frequency decay unit developed out by coaxial Chebyshev's model, resonator upper cover plate 10 is had to be fixed by cover screw 11 above coaxial high Q resonant cavity.
The present invention for solving interference when LAN network frequencies and satellite television frequency range work simultaneously, thus make LAN network frequencies and satellite television frequency band signals mutually unaffected.Pass band width reaches 5 frequencys multiplication.Because general stop-band filter blanketing frequency is comparatively far away, volume is large, and Insertion Loss is large, the requirement that can not realize broad passband, frequency response characteristic are low.Band pass filter pass band width can not produce fade performance to 5010MHZ when meeting DC-5000MHZ.The present invention adopts micro-band matching unit to be combined with the coaxial resonant element of high Q, adopts capacity coupled connected mode thus reaches corresponding requirement.Due to the frequency selectivity of resonator, the signal of assigned frequency can pass through device, and the energy beyond constant-frequency signal is reflected, thus realizes the function of He Ne laser.
The present invention adopts SMA attachment unit interface, realizes the function of communications band high-frequency transmission.The coaxial high Q resonant cavity simultaneously adopting again coaxial filter Chebyshev model design to develop and the combination of near-end resonance oscillation attenuation unit and wideband microband matching unit and transmission, wideband microband matching unit incorporates coaxial high Q resonant cavity and the near-end resonance oscillation attenuation unit of the differentiation of coaxial filter Chebyshev model design.Namely realize the transfer function of wideband frequency, the requirement that near-end suppresses can be met again, adopt capacity coupled mode to make volume reduce to obtain again very high broadband band connection frequency simultaneously, thus reach the high requirement of the little decay of Insertion Loss.
Broad passband stop-band filter technical requirement:
The mode that the present invention adopts microstrip line to mate realizes the band connection frequency of frequency DC-5000MHZ.Because passband skew 10MHZ needs to suppress 40dB. so the patten's design of the coaxial high Q resonant cavity adopting coaxial filter Chebyshev suppressor mode to develop, the frequency range for near-end decays, thus reaches technical target of the product requirement.
accompanying drawing illustrates:
Fig. 1 is structure chart of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is front view of the present invention.
Fig. 4 is the vertical view of Fig. 3.
embodiment:
By axial groove 1, first, two SMA connectors 2, wideband microband matched line 6, coaxial high Q resonant cavity, coaxial high Q resonant rod 3, microstrip line capacitive coupling sheet 4, resonator capacitor coupling piece 5, resonant rod hold-down screw 7, microstrip line hold-down screw 8, microstrip line upper cover plate 9, resonator upper cover plate 10, cover screw 11 forms, in axial groove 1, wideband microband matched line 6 is installed, it is left, right two ends connect first, two SMA connectors 2, there is the coaxial high Q resonant cavity of some axially-aligned the side of axial groove 1, axial groove 1 communicates with some coaxial high Q resonant cavities, coaxial high Q resonant rod 3 is had in coaxial high Q resonant cavity, wideband microband matched line 6 is linear microstrip transmission line, wideband microband matched line 6 is connected with one end of some resonator capacitor coupling pieces 5, the other end of resonator capacitor coupling piece 5 is connected on coaxial high Q resonant rod 3, axial groove 1 has microstrip line cover plate 9 to close above, microstrip line capacitive coupling sheet 4 is positioned at below resonator capacitor coupling piece 5 and is connected on coaxial high Q resonant rod 3, coaxial high Q resonant rod 3 is fixed in coaxial high Q resonant cavity by resonant rod hold-down screw 7, form the coaxial capacitance coupling near-end frequency decay unit-coaxial high Q resonator developed out by coaxial Chebyshev's model, resonator upper cover plate 10 is had to be fixed by cover screw 11 above coaxial high Q resonant cavity.
Microstrip line is connected with 5 microstrip line capacitive coupling sheets 4 in micro-band matching unit, above microstrip line capacitive coupling sheet, corresponding resonator capacitor coupling piece 5 is connected on coaxial high Q resonant rod 3, coaxial high Q resonant rod 3 is fixed in coaxial high Q resonant cavity by resonant rod hold-down screw 7, form the coaxial capacitance coupling attenuation unit developed out by coaxial Chebyshev's model, be distributed on a wideband microband line 6 on one side, thus while reducing volume, form near-end decay.Coaxial high Q resonant rod 3 and coaxial high Q resonant cavity form coaxial high Q resonator, are fixed by the cover screw 11 on resonator upper cover plate 10.Thus near-end attenuation function can be met again while reaching broad passband bandwidth frequency.
Claims (1)
1. broad passband stop-band filter, it is characterized in that by axial groove (1), first, two SMA connectors (2), wideband microband matched line (6), coaxial high Q resonant cavity, coaxial high Q resonant rod (3), microstrip line capacitive coupling sheet (4), resonator capacitor coupling piece (5), resonant rod hold-down screw (7), microstrip line hold-down screw (8), microstrip line upper cover plate (9), resonator upper cover plate (10), cover screw (11) forms, in axial groove (1), wideband microband matched line (6) is installed, it is left, right two ends connect first, two SMA connectors (2), there is the coaxial high Q resonant cavity of some axially-aligned the side of axial groove, axial groove communicates with some coaxial high Q resonant cavities, coaxial high Q resonant rod (3) is had in coaxial high Q resonant cavity, wideband microband matched line (6) is linear microstrip transmission line, wideband microband matched line is connected with one end of some resonator capacitor coupling pieces (5), the other end of resonator capacitor coupling piece is connected on coaxial high Q resonant rod (3), microstrip line cover plate (9) is had to close above axial groove, microstrip line capacitive coupling sheet (4) is positioned at resonator capacitor coupling piece (5) below and is connected on coaxial high Q resonant rod, coaxial high Q resonant rod is fixed in coaxial high Q resonant cavity by resonant rod hold-down screw (7), form the coaxial capacitance coupling near-end frequency decay unit developed out by coaxial Chebyshev's model, resonator upper cover plate (10) is had to be fixed by cover screw (11) above coaxial high Q resonant cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510508389.5A CN105070992A (en) | 2015-08-19 | 2015-08-19 | Wide-bandpass stop-band filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510508389.5A CN105070992A (en) | 2015-08-19 | 2015-08-19 | Wide-bandpass stop-band filter |
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| Publication Number | Publication Date |
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| CN105070992A true CN105070992A (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510508389.5A Pending CN105070992A (en) | 2015-08-19 | 2015-08-19 | Wide-bandpass stop-band filter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101887362B1 (en) * | 2017-02-03 | 2018-08-10 | 주식회사 이너트론 | Communication component |
| KR101887363B1 (en) * | 2017-02-03 | 2018-08-10 | 주식회사 이너트론 | Communication component |
| CN111033884A (en) * | 2018-08-09 | 2020-04-17 | 深圳市大富科技股份有限公司 | Filter, duplexer and communication equipment |
| CN113922018A (en) * | 2020-07-09 | 2022-01-11 | 大富科技(安徽)股份有限公司 | High-pass filter and communication equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB609231A (en) * | 1946-01-07 | 1948-09-28 | Geoffrey Sargood James | Improvements in or relating to electric wave filter devices |
| EP0859422A1 (en) * | 1997-02-07 | 1998-08-19 | Lk-Products Oy | High-frequency filter |
| US5949309A (en) * | 1997-03-17 | 1999-09-07 | Communication Microwave Corporation | Dielectric resonator filter configured to filter radio frequency signals in a transmit system |
| CN201252149Y (en) * | 2008-09-02 | 2009-06-03 | 合肥博仑微波器件有限公司 | Cavity stepped impedance band rejection filter |
| US7915978B2 (en) * | 2009-01-29 | 2011-03-29 | Radio Frequency Systems, Inc. | Compact tunable dual band stop filter |
| CN202134639U (en) * | 2011-08-01 | 2012-02-01 | 成都赛纳赛德科技有限公司 | Adjustable band-stop filter |
| CN102623776A (en) * | 2012-03-20 | 2012-08-01 | 中国计量学院 | Band stop filter based on coaxial cavity |
| CN202737068U (en) * | 2012-08-26 | 2013-02-13 | 陕西微康姆通信技术有限公司 | Passive cavity dot frequency band-stop filter |
-
2015
- 2015-08-19 CN CN201510508389.5A patent/CN105070992A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB609231A (en) * | 1946-01-07 | 1948-09-28 | Geoffrey Sargood James | Improvements in or relating to electric wave filter devices |
| EP0859422A1 (en) * | 1997-02-07 | 1998-08-19 | Lk-Products Oy | High-frequency filter |
| US5949309A (en) * | 1997-03-17 | 1999-09-07 | Communication Microwave Corporation | Dielectric resonator filter configured to filter radio frequency signals in a transmit system |
| CN201252149Y (en) * | 2008-09-02 | 2009-06-03 | 合肥博仑微波器件有限公司 | Cavity stepped impedance band rejection filter |
| US7915978B2 (en) * | 2009-01-29 | 2011-03-29 | Radio Frequency Systems, Inc. | Compact tunable dual band stop filter |
| CN202134639U (en) * | 2011-08-01 | 2012-02-01 | 成都赛纳赛德科技有限公司 | Adjustable band-stop filter |
| CN102623776A (en) * | 2012-03-20 | 2012-08-01 | 中国计量学院 | Band stop filter based on coaxial cavity |
| CN202737068U (en) * | 2012-08-26 | 2013-02-13 | 陕西微康姆通信技术有限公司 | Passive cavity dot frequency band-stop filter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101887362B1 (en) * | 2017-02-03 | 2018-08-10 | 주식회사 이너트론 | Communication component |
| KR101887363B1 (en) * | 2017-02-03 | 2018-08-10 | 주식회사 이너트론 | Communication component |
| CN111033884A (en) * | 2018-08-09 | 2020-04-17 | 深圳市大富科技股份有限公司 | Filter, duplexer and communication equipment |
| CN113922018A (en) * | 2020-07-09 | 2022-01-11 | 大富科技(安徽)股份有限公司 | High-pass filter and communication equipment |
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Application publication date: 20151118 |
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| RJ01 | Rejection of invention patent application after publication |