CN204681323U - A kind of easy tunable band-pass filter circuit - Google Patents
A kind of easy tunable band-pass filter circuit Download PDFInfo
- Publication number
- CN204681323U CN204681323U CN201520568828.7U CN201520568828U CN204681323U CN 204681323 U CN204681323 U CN 204681323U CN 201520568828 U CN201520568828 U CN 201520568828U CN 204681323 U CN204681323 U CN 204681323U
- Authority
- CN
- China
- Prior art keywords
- node
- inductance
- utility
- model
- filter circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Filters And Equalizers (AREA)
Abstract
The utility model discloses a kind of easy tunable band-pass filter circuit, this circuit structure is realized by inductance, tunable capacitor.The utility model can be widely used in WCDMA power of mobile communication amplifier, radar antenna etc. to the strict place of signal performance requirement.Can inhibition zone external noise, improve the stability of electronic circuit.Meanwhile, compare the bandwidth-limited circuit of other structures, it is adjustable that the utility model can realize bandpass filtering, and can apply in the different frequency range of communication system.
Description
Technical field
The utility model relates to a kind of bandwidth-limited circuit, particularly a kind of adjustable bandwidth-limited circuit, and belonging to communication and electronic application field, is have important application in filtering and matching network.
Background technology
In the last few years, a series of research about filter circuit had been carried out both at home and abroad.Achieve a lot of achievement in research, be especially used in mobile communication technology, be used in power-amplifier front-end and radar antenna feed part, filter circuit effectively can solve the large problem of system passband external noise.But its project organization can only use in specific frequency range, and bandwidth is less, make system bulk comparatively large, and versatility is not strong.Simultaneously traditional bandwidth-limited circuit is due to the problem of its circuit structure, and make temperature sensitivity extremely strong, applicability is very limited.The utility model, for above problem, can effectively solve, and to meet system requirements, and stability is high, volume is little, compact conformation, processing are simple, applied widely.
Summary of the invention
The utility model provides a kind of and has adjustable, that structure is simple, volume is little, stability is high bandwidth-limited circuit.
The technical scheme realizing the utility model object is: a kind of easy adjustable Simple strip bandpass filter circuit, comprises input port 1, output port 2, coupling inductance L
2, L
4; Two passive inductance L
1, L
3; Three tunable capacitor C
1, C
2and C
3; Input port 1 is connected with node 1; , output port 2 is connected with node 2; Wherein coupling inductance L
2one end be connected with node 1, the other end is connected to the ground and connects; Coupling inductance L
4one end be connected with node 2, the other end is connected to the ground and connects; Inductance L
1one end be connected with node 1, the other end is connected with node 5; Inductance L
3one end be connected with node 2, the other end is connected with node 6; Electric capacity C
1one end be connected with node 5, the other end is connected with node 6; Electric capacity C
2one end is connected with node 5, and the other end is connected to the ground and connects; Electric capacity C
3one end is connected with node 6, and the other end is connected to the ground and connects; Input port 1 and input port 2 all connect 50 ohmages; This circuit structure is realized by inductance, tunable capacitor, and electric capacity all adopts tunable capacitor.
Compared with prior art, the utility model provides the feature that a kind of adjustable, structure is simple, multiband, compact conformation, stability are high.
Accompanying drawing explanation
Fig. 1 is a kind of easy adjustable Simple strip bandpass filter circuit structure chart of the utility model.
Fig. 2 is that a kind of easy tunable band-pass filter circuit of the utility model inserts and return loss response.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Composition graphs 1, the utility model is a kind of easy tunable band-pass filter circuit, comprises input port 1, output port 2, coupling inductance L
2, L
4; Two passive inductance L
1, L
3; Three tunable capacitor C
1, C
2and C
3; Input port 1 is connected with node 1; , output port 2 is connected with node 2; Wherein coupling inductance L
2one end be connected with node 1, the other end is connected to the ground and connects; Coupling inductance L
4one end be connected with node 2, the other end is connected to the ground and connects; Inductance L
1one end be connected with node 1, the other end is connected with node 5; Inductance L
3one end be connected with node 2, the other end is connected with node 6; Electric capacity C
1one end be connected with node 5, the other end is connected with node 6; Electric capacity C
2one end is connected with node 5, and the other end is connected to the ground and connects; Electric capacity C
3one end is connected with node 6, and the other end is connected to the ground and connects; Input port 1 and input port 2 all connect 50 ohmages; This circuit structure is realized by inductance, tunable capacitor, and electric capacity all adopts tunable capacitor.
Composition graphs 2, when inductance is fixed, tunable capacitor C
2, C
3during change, can be found out by its simulation result, this bandwidth-limited circuit can effectively realize adjustable, and designed this kind of adjustable band pass filter can be used in certain pulse multichannel receiver, and through the modulation and demodulation of FSK, Output rusults is good.Result is used to show that this device has good degree of suppression to channel receiver modulating pulse and noise level, effectively overcome and adopt the problem that in traditional design process, design procedure is too complicated, volume is excessive, can ensure that device obtains best channel signal transmission effect.
Claims (1)
1. an easy tunable band-pass filter circuit, is characterized in that: comprise input port 1, output port 2, coupling inductance L
2, L
4; Two passive inductance L
1, L
3; Three tunable capacitor C
1, C
2and C
3; Input port 1 is connected with node 1; , output port 2 is connected with node 2; Wherein coupling inductance L
2one end be connected with node 1, the other end is connected to the ground and connects; Coupling inductance L
4one end be connected with node 2, the other end is connected to the ground and connects; Inductance L
1one end be connected with node 1, the other end is connected with node 5; Inductance L
3one end be connected with node 2, the other end is connected with node 6; Electric capacity C
1one end be connected with node 5, the other end is connected with node 6; Electric capacity C
2one end is connected with node 5, and the other end is connected to the ground and connects; Electric capacity C
3one end is connected with node 6, and the other end is connected to the ground and connects; Input port 1 and input port 2 all connect 50 ohmages; This circuit structure is realized by inductance, tunable capacitor, and electric capacity all adopts tunable capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520568828.7U CN204681323U (en) | 2015-08-01 | 2015-08-01 | A kind of easy tunable band-pass filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520568828.7U CN204681323U (en) | 2015-08-01 | 2015-08-01 | A kind of easy tunable band-pass filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204681323U true CN204681323U (en) | 2015-09-30 |
Family
ID=54180990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520568828.7U Expired - Fee Related CN204681323U (en) | 2015-08-01 | 2015-08-01 | A kind of easy tunable band-pass filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204681323U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993800A (en) * | 2015-08-01 | 2015-10-21 | 王福建 | Easy adjustable band-pass filter circuit |
| WO2017096991A1 (en) * | 2015-12-08 | 2017-06-15 | Huawei Technologies Co., Ltd. | Tunable bandpass filter |
-
2015
- 2015-08-01 CN CN201520568828.7U patent/CN204681323U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993800A (en) * | 2015-08-01 | 2015-10-21 | 王福建 | Easy adjustable band-pass filter circuit |
| WO2017096991A1 (en) * | 2015-12-08 | 2017-06-15 | Huawei Technologies Co., Ltd. | Tunable bandpass filter |
| US9761921B2 (en) | 2015-12-08 | 2017-09-12 | Huawei Technologies Canada Co., Ltd. | Tunable bandpass filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104104349A (en) | Wireless filtering circuit | |
| CN104218939A (en) | Adjustable hybrid coupler circuit | |
| CN204681323U (en) | A kind of easy tunable band-pass filter circuit | |
| CN104202006A (en) | Adjustable simple low-pass filtering circuit | |
| CN204119188U (en) | A kind of Novel Filter | |
| CN204481773U (en) | A kind of low-pass filter circuit | |
| CN204465505U (en) | A kind of adjustable hybrid coupler circuit | |
| CN204442340U (en) | A kind of easy variable coupler circuit | |
| CN104682947A (en) | Simple adjustable coupler circuit | |
| CN204046569U (en) | A kind of adjustable hybrid coupler circuit | |
| CN204119180U (en) | A kind of adjustable simple and easy low-pass filter circuit | |
| CN204681365U (en) | A kind of easy tunable radio frequency match circuit | |
| CN204206123U (en) | A kind of chain type low-pass filter circuit | |
| CN204761402U (en) | But filter circuit of zeroing | |
| CN204681324U (en) | A kind of duplexer circuit | |
| CN204465504U (en) | A kind of coupler circuit with the different degree of coupling | |
| CN104993798A (en) | Filter circuit with adjustable zero point | |
| CN204119177U (en) | A kind of wireless filter circuit | |
| CN204741060U (en) | Multi -functional coupler circuit | |
| CN104993204A (en) | Multifunctional coupler circuit | |
| CN204206124U (en) | A kind of regulable ring-shaped coupler | |
| CN204442305U (en) | A kind of filter circuit based on resonator | |
| CN204928766U (en) | Low -pass filter circuit | |
| CN104702237A (en) | Filter circuit based on resonator | |
| CN204442304U (en) | A kind of novel coupler circuit |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20160801 |