CN204834806U - Medium band stop notch filter - Google Patents
Medium band stop notch filter Download PDFInfo
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- CN204834806U CN204834806U CN201520657423.0U CN201520657423U CN204834806U CN 204834806 U CN204834806 U CN 204834806U CN 201520657423 U CN201520657423 U CN 201520657423U CN 204834806 U CN204834806 U CN 204834806U
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- coupling inductance
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- boosting capacitor
- resonator
- notch filter
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Abstract
The utility model discloses a medium band stop notch filter, include the PCB circuit board, set up the input interface and the output interface that are used for with external circuit connection on this PCB circuit board concatenate between input interface and the output interface a plurality of coupling inductance tie point between a plurality of coupling inductance is connected with the one end of a plurality of trapped wave electric capacity respectively, every the other end of trapped wave electric capacity has connect trapped wave resonance unit respectively, trapped wave resonance unit is dielectric resonator. Adopt the technical scheme of the utility model, through adopting dielectric resonator as trapped wave resonance unit to compensatied the lower shortcoming of traditional LC syntonizer Q value, simultaneously dielectric resonator has advantages such as small, low price, and it belongs to discrete device moreover, very convenient parameter of adjusting the wave filter, and modes such as dielectric constant through changing dielectric resonator and syntonizer geometry just can reach change resonant frequency's effect.
Description
Technical field
The utility model relates to wave filter technology field, particularly relates to a kind of medium belt resistance notch filter.
Background technology
In prior art, band stop filter has two kinds of modes usually, adopts LC lumped-parameter element or adopts integrated encapsulation structure to realize, the LC band stop filter designed with conventional lumped-parameter element, although cost is low, flexible design, easy to make, but because LC quality factor q is lower, higher in frequency, when stopband is narrower, the performance of conventional LC cannot reach requirement, add parasitic effects, actual to realize difficulty too large, and less effective.
Adopt the band stop filter of integrated encapsulation structure, although Q value is higher, high frequency performance is necessarily improved, and integrated encapsulation structure makes complexity, cost is high, and the parameter of integrated encapsulation structure cannot adjust in the later stage, is unfavorable for circuit debugging.
Therefore, for the above-mentioned defect existed in currently available technology, be necessary to study in fact, to provide a kind of scheme, solve the defect existed in prior art.
Utility model content
In order to overcome the defect that prior art exists, necessary a kind of advantage not only with lumped-parameter element but also the novel medium band that can improve its Q value of providing hinders notch filter.
In order to solve the problem of prior art, the technical solution of the utility model is:
A kind of medium belt resistance notch filter, comprise PCB, be arranged in this PCB for the input interface that is connected with external circuit and output interface, the tie point be connected in series between described input interface and output interface between multiple coupling inductance, described multiple coupling inductance is connected with one end of multiple boosting capacitor respectively, and the other end of each described boosting capacitor is connected to trap resonant element respectively;
Described trap resonant element is dielectric resonator.
Preferably, multiple coupling inductance comprises the first coupling inductance L1, second coupling inductance L2 and the 3rd coupling inductance L3, described multiple boosting capacitor comprises the first boosting capacitor C1 and the second boosting capacitor C2, described dielectric resonator comprises first medium resonator DR1 and second medium resonator DR2, wherein, described input interface is connected with one end of described first coupling inductance L1, the other end of described first coupling inductance L1 is connected with one end with described first boosting capacitor C1, one end of described second coupling inductance L2, the other end of described second coupling inductance L2 is connected with one end of described second boosting capacitor C2 with one end of described 3rd coupling inductance L3, the other end of described 3rd coupling inductance L3 is connected with described output interface, the other end of described first boosting capacitor C1 is connected with one end of described first medium resonator DR1, the other end of described first medium resonator DR1 is held with ground and is connected, the other end of described second boosting capacitor C2 is connected with one end of described second medium resonator DR2, the other end of described second medium resonator DR2 is held with ground and is connected.
Preferably, be connected by sheet metal between described first boosting capacitor C1 with described first medium resonator DR1, be connected by sheet metal between described second boosting capacitor C2 with described second medium resonator DR2.
Preferably, described first boosting capacitor C1 is closely arranged between described first coupling inductance L1 and described second coupling inductance L2, and described second boosting capacitor C2 is closely arranged between described second coupling inductance L2 and described 3rd coupling inductance L3.
Preferably, described PCB is FR-4 substrate or ceramic substrate.
Preferably, the circumference of described PCB arranges multiple fixing hole.
Preferably, described input interface and described output interface are the pad being arranged on PCB edge, in this pad, arrange fixing hole.
Preferably, described fixing hole is semicircle.
Preferably, described trap resonant element and described multiple coupling inductance are separately positioned on the two ends of described PCB.
Preferably, described first medium resonator DR1 and described second medium resonator DR2 is arranged in described PCB in the mode of welding or stickup.
Compared with prior art, the utility model is by adopting dielectric resonator as trap resonant element, thus compensate for the lower shortcoming of traditional LC resonator q, simultaneously to have volume little for dielectric resonator, the advantage such as cheap, and it belongs to discrete device, the parameter of very convenient adjustment filter, just can reach the effect of change resonance frequency by changing the modes such as the dielectric constant of dielectric resonator and resonator physical dimension.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model medium belt resistance notch filter.
Fig. 2 is the analogous diagram of the utility model medium belt resistance notch filter.
Following specific embodiment will further illustrate the utility model in conjunction with above-mentioned accompanying drawing.
Embodiment
Below with reference to accompanying drawing, the technical scheme that the utility model provides is described further.
See Fig. 1, be depicted as the structured flowchart of the utility model medium belt resistance notch filter, comprise PCB 1, be arranged in this PCB 1 for the input interface 2 that is connected with external circuit and output interface 3, the tie point be connected in series between described input interface 2 and output interface 3 between multiple coupling inductance, described multiple coupling inductance is connected with one end of multiple boosting capacitor respectively, and the other end of each described boosting capacitor is connected to trap resonant element respectively; Described trap resonant element is dielectric resonator.
Further, multiple coupling inductance comprises the first coupling inductance L1, second coupling inductance L2 and the 3rd coupling inductance L3, described multiple boosting capacitor comprises the first boosting capacitor C1 and the second boosting capacitor C2, described dielectric resonator comprises first medium resonator DR1 and second medium resonator DR2, wherein, described input interface 2 is connected with one end of described first coupling inductance L1, the other end of described first coupling inductance L1 is connected with one end with described first boosting capacitor C1, one end of described second coupling inductance L2, the other end of described second coupling inductance L2 is connected with one end of described second boosting capacitor C2 with one end of described 3rd coupling inductance L3, the other end of described 3rd coupling inductance L3 is connected with described output interface 3, the other end of described first boosting capacitor C1 is connected with one end of described first medium resonator DR1, the other end of described first medium resonator DR1 is held with ground and is connected, the other end of described second boosting capacitor C2 is connected with one end of described second medium resonator DR2, the other end of described second medium resonator DR2 is held with ground and is connected.
In foregoing circuit, L1, L2, L3 are coupling inductance, play the coupling between each trap wave point and between input interface and output interface.C1, C2 is boosting capacitor, and DR1, DR2 are dielectric resonator, first boosting capacitor C1, first medium resonator DR1 forms first trap wave point, the second boosting capacitor C2, and second medium resonator DR2 forms second trap wave point, by controlling the first boosting capacitor C1, first medium resonator DR1, the second boosting capacitor C2, the size of second medium resonator DR2 controls to fall into wave frequency, the i.e. stop-band frequency of band stop filter.
The technical solution of the utility model is by adopting dielectric resonator as trap resonant element, thus compensate for the lower shortcoming of traditional LC resonator q, simultaneously to have volume little for dielectric resonator, the advantage such as cheap, and it belongs to discrete device, the parameter of very convenient adjustment filter, just can reach the effect of change resonance frequency by changing the modes such as the dielectric constant of dielectric resonator and resonator physical dimension.
In order to promote the performance of medium belt resistance notch filter, in a preferred embodiment, be connected by sheet metal between described first boosting capacitor C1 with described first medium resonator DR1, be connected by sheet metal between described second boosting capacitor C2 with described second medium resonator DR2.Owing to adopting sheet metal to connect, thus promote electric transmission performance between boosting capacitor and dielectric resonator.
In a preferred embodiment, described first boosting capacitor C1 is closely arranged between described first coupling inductance L1 and described second coupling inductance L2, and described second boosting capacitor C2 is closely arranged between described second coupling inductance L2 and described 3rd coupling inductance L3.Owing to closely arranging between boosting capacitor and coupling inductance, thus reduce the decay of Signal transmissions.
In a preferred embodiment, described PCB 1 is FR-4 substrate or ceramic substrate.Usual employing high-dielectric-constant ceramics substrate, thus the high frequency performance promoting medium belt resistance notch filter.
Hinder the connection of notch filter and external circuit for the ease of medium belt, the circumference of PCB 1 arranges multiple fixing hole 4.Through fixing hole 4 medium belt hindered notch filter by screw and external circuit is fixed together.Preferably, described fixing hole 4 is semicircle.
Hinder the electrical connection of notch filter and external circuit for the ease of medium belt, described input interface 2 and described output interface 3, for being arranged on the pad at PCB 1 edge, arrange fixing hole 4 in this pad.Be electrically connected through the fixing hole in pad and external circuit by screw.
In a preferred embodiment, for the ease of regulating the parameter of medium belt resistance notch filter, described trap resonant element and described multiple coupling inductance are separately positioned on the two ends of described PCB 1.
In a preferred embodiment, described first medium resonator DR1 and described second medium resonator DR2 is arranged in described PCB 1 in the mode of welding or stickup.
See Fig. 2, be depicted as the effect emulation figure of the utility model medium belt resistance notch filter, as can be seen from the figure, adopt the technical solution of the utility model, passband width frequency can reach more than GHz level, thus compensate for the lower shortcoming of traditional LC resonator q, dielectric resonator belongs to discrete device simultaneously, the parameter of very convenient adjustment medium belt resistance notch filter, as long as the mode such as the dielectric constant of change dielectric resonator and resonator physical dimension just can reach the effect changing resonance frequency.
The explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection range of the utility model claim.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a medium belt resistance notch filter, it is characterized in that, comprise PCB, be arranged in this PCB for the input interface that is connected with external circuit and output interface, the tie point be connected in series between described input interface and output interface between multiple coupling inductance, described multiple coupling inductance is connected with one end of multiple boosting capacitor respectively, and the other end of each described boosting capacitor is connected to trap resonant element respectively;
Described trap resonant element is dielectric resonator.
2. medium belt resistance notch filter according to claim 1, it is characterized in that, multiple coupling inductance comprises the first coupling inductance L1, second coupling inductance L2 and the 3rd coupling inductance L3, described multiple boosting capacitor comprises the first boosting capacitor C1 and the second boosting capacitor C2, described dielectric resonator comprises first medium resonator DR1 and second medium resonator DR2, wherein, described input interface is connected with one end of described first coupling inductance L1, the other end of described first coupling inductance L1 is connected with one end with described first boosting capacitor C1, one end of described second coupling inductance L2, the other end of described second coupling inductance L2 is connected with one end of described second boosting capacitor C2 with one end of described 3rd coupling inductance L3, the other end of described 3rd coupling inductance L3 is connected with described output interface, the other end of described first boosting capacitor C1 is connected with one end of described first medium resonator DR1, the other end of described first medium resonator DR1 is held with ground and is connected, the other end of described second boosting capacitor C2 is connected with one end of described second medium resonator DR2, the other end of described second medium resonator DR2 is held with ground and is connected.
3. medium belt resistance notch filter according to claim 2, it is characterized in that, be connected by sheet metal between described first boosting capacitor C1 with described first medium resonator DR1, be connected by sheet metal between described second boosting capacitor C2 with described second medium resonator DR2.
4. medium belt resistance notch filter according to claim 2, it is characterized in that, described first boosting capacitor C1 is closely arranged between described first coupling inductance L1 and described second coupling inductance L2, and described second boosting capacitor C2 is closely arranged between described second coupling inductance L2 and described 3rd coupling inductance L3.
5. medium belt resistance notch filter according to claim 1, it is characterized in that, described PCB is FR-4 substrate or ceramic substrate.
6. medium belt resistance notch filter according to claim 1 and 2, it is characterized in that, the circumference of described PCB arranges multiple fixing hole.
7. medium belt resistance notch filter according to claim 1 and 2, it is characterized in that, described input interface and described output interface are the pad being arranged on PCB edge, in this pad, arrange fixing hole.
8. medium belt resistance notch filter according to claim 6, it is characterized in that, described fixing hole is semicircle.
9. medium belt resistance notch filter according to claim 1, it is characterized in that, described trap resonant element and described multiple coupling inductance are separately positioned on the two ends of described PCB.
10. medium belt resistance notch filter according to claim 2, it is characterized in that, described first medium resonator DR1 and described second medium resonator DR2 is arranged in described PCB in the mode of welding or stickup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520657423.0U CN204834806U (en) | 2015-08-28 | 2015-08-28 | Medium band stop notch filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520657423.0U CN204834806U (en) | 2015-08-28 | 2015-08-28 | Medium band stop notch filter |
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| CN204834806U true CN204834806U (en) | 2015-12-02 |
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| CN201520657423.0U Active CN204834806U (en) | 2015-08-28 | 2015-08-28 | Medium band stop notch filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021077379A1 (en) * | 2019-10-24 | 2021-04-29 | 华为技术有限公司 | Band-stop filter and electronic device |
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2015
- 2015-08-28 CN CN201520657423.0U patent/CN204834806U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021077379A1 (en) * | 2019-10-24 | 2021-04-29 | 华为技术有限公司 | Band-stop filter and electronic device |
| CN114556693A (en) * | 2019-10-24 | 2022-05-27 | 华为技术有限公司 | Band elimination filter and electronic equipment |
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