CN2613065Y - TEM wave band stop filter with loaded capacitor - Google Patents
TEM wave band stop filter with loaded capacitor Download PDFInfo
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- CN2613065Y CN2613065Y CN 03221365 CN03221365U CN2613065Y CN 2613065 Y CN2613065 Y CN 2613065Y CN 03221365 CN03221365 CN 03221365 CN 03221365 U CN03221365 U CN 03221365U CN 2613065 Y CN2613065 Y CN 2613065Y
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- resonator
- transmission line
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Abstract
A capacitor loading horizontal electromagnetic wave band-stop filter relates to a microwave filter, comprising a transmission line 1 and a resonator 2, wherein the filter takes the transmission line 1 as a symmetric axis, the U shaped resonators 2 are symmetrically and alternatively equipped on two sides of the transmission line, one end 4 of the U shaped resonator is a short end which is short circuit and is directly connected with the ground, the other end 7 is a capacitor coupling end, a loading capacitor 3 is connected between the capacitor coupling end and the ground, one end 4 of the U shaped resonate is directly and flexibly contacted with a side wall of a filter cavity 5 to form a short circuit, the other end 7 of the U shaped resonator acts as a pole of the loading capacitor 3, a side wall of the filter chamber 5 is provided with an adjusting screw 8 as another pole of the loading capacitor 3, the adjusting screw 8 crosses out of the side wall of the filter chamber 5 and can adjust the size of the loading capacitor 3. The utility model not only can adjust the couple between the resonator 2 and the transmission line 1, but also can adjust the resonant frequency of the resonator 2, meanwhile the length of the whole resonator is shortened, and the frequency interval between the stop band and a parasitic stop band is increased in performance.
Description
One, technical field
The utility model relates to a kind of microwave filter, transverse electro-magnetic wave especially (TEM ripple) band stop filter.
Two, background technology
At present, the structure of known TEM wavestrip resistance filter is: one section transmission line; Resonator with one or more cascades of this transmission line coupling.The coupling of resonator and transmission line both can be the Terminal Capacitance coupling, also can be the parallel coupling of overall length or partial-length.The shape of resonator both can be the I type, also can be the L type.Its structural compound mode has: the parallel coupling with transmission line of I shape resonator; I shape resonator and transmission line end capacitive coupling; The parallel coupling of L shaped resonator with transmission line.The subject matter of these TEM wavestrips resistance filters is: at first aspect tuning, inconvenience, have only one tuning, change the coupling size and also changed resonance frequency simultaneously; In configuration aspects, the length of resonator is longer; At aspect of performance, the frequency interval of stopband and parasitic stopband is nearer;
Three, summary of the invention
1, technical problem
For convenience tuning, a plurality of tuning degrees of freedom are provided, the utility model proposes a kind of capacitive load transverse electro-magnetic wave band stop filter, the resonator in this filter both can tuned resonator and transmission line between coupling, resonance frequency that also can tuned resonator itself.
2, technical scheme
Capacitive load transverse electro-magnetic wave band stop filter of the present utility model, formed by the transmission line resonator, this filter is symmetry axis with the transmission line, the bilateral symmetry of transmission line separately be provided with the U-shaped resonator, one end of U-shaped resonator is a short-circuit end direct short-circuit ground connection, and the other end is to be connected to loading capacitance between capacitive coupling end and the ground.One end of U-shaped resonator directly forms short circuit with movable contact of cavity wall, the other end of U-shaped resonator is as a utmost point of loading capacitance, an adjustment screw another utmost point as loading capacitance is arranged on the sidewall of filter cavity, this adjustment screw passes the sidewall of filter cavity, the size of scalable loading capacitance.
3, beneficial effect
The beneficial effects of the utility model are, both can regulate the coupling between resonator and the transmission line, resonance frequency that also can tuned resonator itself.Also shorten simultaneously the length of whole filter, increased the frequency interval of stopband and parasitic stopband on the performance.
Four, description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.Wherein have: the capacitive coupling end 7 of the adjustable loading capacitance 3 of transmission line 1, U-shaped resonator 2, U-shaped resonator, the short-circuit end 4 of U-shaped resonator, U-shaped resonator.
Fig. 2 is a structure chart of the present utility model.Wherein have: adjustment screw 8, joint 9, filter cavity 5, via hole 6.
Five, embodiment
The utility model is described in further detail below in conjunction with drawings and Examples
The embodiment that the utility model adopted is: TEM wavestrip resistance filter comprises one section transmission line 1 and one or more resonator 2.The shape of resonator 2 adopts the U type, and resonator 2 is along arranging on the length direction of transmission line 1; Resonator and transmission line adopt the parallel mode coupling; One end 4 of resonator is short circuit, contacts with filter cavity 5 sidewalls are movable, can change the distance of resonator and transmission line, and then change the coupling size of resonator and transmission line; The other end 7 of resonator is adjustable loading capacitance 3, by changing the resonance frequency that the filter cavity body sidewall raises the insertion depth change resonator of humorous screw 8; Loading capacitance 3 had both shortened the length of whole resonator, had also improved the frequency of parasitic stopband, thereby had increased the frequency interval of stopband and parasitic stopband.
The via hole 6 that the short-circuit end 4 of U-shaped resonator 2 inserts on filter cavity 5 sidewalls, be slidingly connected between the two, so both can guarantee good short circuit ground connection, can regulate the distance between transmission line 1 and the U-shaped resonator 2 again, just change the coupling coefficient between transmission line 1 and the U-shaped resonator 2.The capacitive coupling end 7 and the adjustment screw on the filter cavity body sidewall 8 of U-shaped resonator 2 constitute adjustable loading capacitance, change the insertion depth of adjustment screw 8, just can change the size of loading capacitance 3, the size that changes loading capacitance 3 can change the resonance frequency of U-shaped resonator 2, thereby can compensate because coupling coefficient changes U-shaped resonator 2 change of resonance frequency that cause.Transmission line 1 is by connected joint 9 input/output signals of process.
Claims (2)
1, a kind of capacitive load transverse electro-magnetic wave band stop filter, formed by the transmission line resonator, it is characterized in that this filter is a symmetry axis with transmission line (1), the bilateral symmetry of transmission line (1) separately be provided with U-shaped resonator (2), one end of U-shaped resonator (2) is short-circuit end (a 4) direct short-circuit ground connection, and the other end is to be connected to loading capacitance (3) between capacitive coupling end (7) and the ground.
2, capacitive load transverse electro-magnetic wave band stop filter according to claim 1, an end that it is characterized in that U-shaped resonator (2) directly forms short circuit with movable contact of cavity wall, the other end (7) of U-shaped resonator (2) is as a utmost point of loading capacitance (3), an adjustment screw (8) another utmost point as loading capacitance (3) is arranged on the sidewall of filter cavity (5), this adjustment screw (8) passes the sidewall of filter cavity (5), the size of scalable loading capacitance (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03221365 CN2613065Y (en) | 2003-04-23 | 2003-04-23 | TEM wave band stop filter with loaded capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03221365 CN2613065Y (en) | 2003-04-23 | 2003-04-23 | TEM wave band stop filter with loaded capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2613065Y true CN2613065Y (en) | 2004-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03221365 Expired - Fee Related CN2613065Y (en) | 2003-04-23 | 2003-04-23 | TEM wave band stop filter with loaded capacitor |
Country Status (1)
| Country | Link |
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| CN (1) | CN2613065Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637929A (en) * | 2012-03-29 | 2012-08-15 | 南京赛格微电子科技有限公司 | Band stop filter with suspension line |
| CN103022600A (en) * | 2012-12-24 | 2013-04-03 | 中国计量学院 | Symmetric ring twisted-pair-shaped terahertz wave filter |
| CN106848503A (en) * | 2017-03-24 | 2017-06-13 | 中国振华集团云科电子有限公司 | Film filter and film filter manufacture method |
| CN106848512A (en) * | 2016-12-14 | 2017-06-13 | 武汉凡谷电子技术股份有限公司 | Ultra wide band high-pass filter |
| CN107658533A (en) * | 2017-10-20 | 2018-02-02 | 京信通信系统（中国）有限公司 | Bandstop filter and radio-frequency devices |
-
2003
- 2003-04-23 CN CN 03221365 patent/CN2613065Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637929A (en) * | 2012-03-29 | 2012-08-15 | 南京赛格微电子科技有限公司 | Band stop filter with suspension line |
| CN103022600A (en) * | 2012-12-24 | 2013-04-03 | 中国计量学院 | Symmetric ring twisted-pair-shaped terahertz wave filter |
| CN106848512A (en) * | 2016-12-14 | 2017-06-13 | 武汉凡谷电子技术股份有限公司 | Ultra wide band high-pass filter |
| CN106848512B (en) * | 2016-12-14 | 2019-06-07 | 武汉凡谷电子技术股份有限公司 | Ultra wide band high-pass filter |
| CN106848503A (en) * | 2017-03-24 | 2017-06-13 | 中国振华集团云科电子有限公司 | Film filter and film filter manufacture method |
| CN107658533A (en) * | 2017-10-20 | 2018-02-02 | 京信通信系统（中国）有限公司 | Bandstop filter and radio-frequency devices |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |