CN104467727A - Adjustable absorption type filter - Google Patents
Adjustable absorption type filter Download PDFInfo
- Publication number
- CN104467727A CN104467727A CN201410622166.7A CN201410622166A CN104467727A CN 104467727 A CN104467727 A CN 104467727A CN 201410622166 A CN201410622166 A CN 201410622166A CN 104467727 A CN104467727 A CN 104467727A
- Authority
- CN
- China
- Prior art keywords
- parallel
- consumption
- inductance
- filter
- mode filter
- 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.)
- Pending
Links
Abstract
The invention belongs to a non-reflection filter in the field of communication technology component production. The filter comprises two ports, a lossy parallel connection RLC resonance unit and a lossy series connection RLC resonance unit. One end of the lossy series connection RLC resonance unit is connected between two inductors of the parallel connection resonance unit, and the other end of the lossy series connection resonance RLC unit is connected with the ground. The filter has an adjustable function, has high capacity of being adapted to signal intensity fluctuations and signal frequency fluctuations, can work conveniently from low frequency to high frequency, is high in productivity and has good application prospects.
Description
Technical field
The invention belongs to the filter in communication technology components and parts production field, particularly a kind of adjustable absorption reflectionless filter.
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 wireless mobile telecommunication 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.And filter is as the one of filter, there is the effect suppressing unnecessary frequency signal.All kinds of corrupt practices creep in for traditional filter tool based on signal reflex, and the signal that such as stopband attenuation is little, port match is poor, port reflects goes back has a strong impact on systematic function etc.Absorbing mode filter is by absorbing can fundamentally address this problem completely to resistance inband signaling.And effectively realize the regulable center frequency of filter, realize the function of linear phase.
Summary of the invention
The object of the invention is the defect existed for background technology, a kind of adjustable absorbing mode filter of Curve guide impeller, to overcome the defect that background technology exists, reaches the characteristic that this filter centre frequency is adjustable, have linear phase simultaneously.Realize production technology easy, to the strong adaptability that signal strength signal intensity fluctuation and signal frequency are fluctuated, in production, only need adjust capacitor
the parameter corresponding band that can obtain the application of different frequency range from low to high hinder.
Solution of the present invention is the defect existed for background technology, adopts a kind of circuit with lumped element model, a kind of aspiration-type filter of Curve guide impeller; This aspiration-type filter comprises two ports, and one has consumption in parallel
resonant element, one have consumption series connection
resonant element is formed; Wherein there is consumption in parallel
the inductance of resonant element is made up of two inductance, consumes series resonator there being consumption parallel resonator and is in parallel with having.Consumption parallel resonator two ends are had to be connected with input port 1, output port 2 respectively; There is consumption series connection
one end is connected between two inductance of parallel resonator, and the other end is connected to the ground and connects; Input port 1 (Port1), output port 2 (Port2) all connect 50 ohmages.There is consumption in parallel
resonator is by a resistance
, an electric capacity
and inductance
be formed in parallel, wherein inductance
be divided into
two inductance (
).By adjustment capacitor
value, this absorbing mode filter regulable center frequency can be realized, and there is linear phase characteristic.
The present invention utilizes lamped element to achieve suppression to stopband signal and absorption, realizes the function of passband signal transmission; This absorbing mode filter can absorb resistance inband signaling well, thus solves the problem that suppressed signal impacts filter front end circuit.Thus the present invention has the function of regulable center frequency, and has linear phase; Production technology is easy, device stable performance in making, reliability are high, to the strong adaptability that signal strength signal intensity fluctuation and signal frequency are fluctuated, easily can realize very wide frequency ranges of operation from low to high, productivity ratio is high, has the features such as good application prospect in modern communications electronic system.
Accompanying drawing explanation
Fig. 1 is a kind of adjustable absorbing mode filter circuit diagram of the present invention.
Fig. 2 is a kind of adjustable absorbing mode filter S parameter characteristic figure of the present invention.
Fig. 3 is a kind of adjustable absorbing mode filter phase characteristic curve figure of the present invention.
Fig. 4 is that a kind of adjustable absorbing mode filter of the present invention is with electric capacity
during change, its S21 parameter characteristic figure.
Embodiment
Embodiment 1: the present embodiment with the stopband center frequency of filter for 2GHz, the absorbing mode filter of full lumped-parameter element structure is adopted to be example: the circuit structure of the present embodiment is as shown in accompanying drawing 1, accompanying drawing 2 is the S parameters simulation curve chart of the present embodiment filter, and in figure, S11 is signal reflex coefficient, S21 is signal propagation coefficient; Can find out from Fig. 2: the present embodiment is fine to signal suppressing in stopband, is absorbed by absorption resistance completely, does not occur reflected signal.Accompanying drawing 3 is aspiration-type filter phases performance diagram of the present invention, and as can be seen from Figure 3, the filter of the present embodiment has the characteristic of linear phase.When the electric capacity in example
get different parameters, as can be seen from accompanying drawing 4, by changing electric capacity
value, the present embodiment has the adjustable function of filter centre frequency.
Designed by there is linear phase filter can be used in wireless WLAN mobile communication, through the modulation and demodulation of FSK, Output rusults is good.Use result to show that this device has good degree of suppression to channel receiver modulating pulse and noise level, can ensure that device obtains best channel signal assimilation effect.
Claims (4)
1. an adjustable absorbing mode filter, comprises two ports, and one has consumption in parallel
resonant element, one have consumption series connection
resonant element is formed; Wherein there is consumption in parallel
the inductance of resonant element is made up of two inductance, consumes series resonator there being consumption parallel resonator and is in parallel with having.Consumption parallel resonator two ends are had to be connected with input port 1, output port 2 respectively; There is consumption series connection
one end is connected between two inductance of parallel resonator, and the other end is connected to the ground and connects; Input port 1 (Port1), output port 2 (Port2) all connect 50 ohmages.
2., by adjustable absorbing mode filter described in claim 1, described in it is characterized in that, there is consumption in parallel
resonator is by a resistance
, an electric capacity
and inductance
be formed in parallel, wherein inductance
be divided into
two inductance (
).
3., by adjustable absorbing mode filter described in claim 1, described in it is characterized in that, there is consumption in parallel
resonator with connect
resonator is in parallel.
4. by adjustable absorbing mode filter described in claim 1, it is characterized in that: by adjustment capacitor
value, this absorbing mode filter regulable center frequency can be realized, and there is linear phase characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410622166.7A CN104467727A (en) | 2014-11-07 | 2014-11-07 | Adjustable absorption type filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410622166.7A CN104467727A (en) | 2014-11-07 | 2014-11-07 | Adjustable absorption type filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104467727A true CN104467727A (en) | 2015-03-25 |
Family
ID=52913216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410622166.7A Pending CN104467727A (en) | 2014-11-07 | 2014-11-07 | Adjustable absorption type filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104467727A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039737A (en) * | 2015-12-31 | 2017-08-11 | 英飞凌科技股份有限公司 | Passive equalizer for directional coupler |
| CN110380228A (en) * | 2019-07-23 | 2019-10-25 | 中国科学技术大学 | A kind of wave absorbing device part based on reflectionless filter principle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1274199A (en) * | 1999-05-12 | 2000-11-22 | 石应华 | Broad-band phase shifter with adjustable positive slope and its usage |
| CN2550962Y (en) * | 2002-05-17 | 2003-05-14 | 顺泰电子科技有限公司 | Circuit device of wave trap |
| JP4279539B2 (en) * | 2002-11-13 | 2009-06-17 | 島田理化工業株式会社 | Resistance attenuator |
| US20090219117A1 (en) * | 2008-02-29 | 2009-09-03 | General Instrument Corporation | Plug-in device for signal correction |
| CN102365784A (en) * | 2009-02-09 | 2012-02-29 | 联合大学公司 | Reflectionless filters |
| CN103259501A (en) * | 2013-05-31 | 2013-08-21 | 电子科技大学 | Band elimination filter for communication system |
-
2014
- 2014-11-07 CN CN201410622166.7A patent/CN104467727A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1274199A (en) * | 1999-05-12 | 2000-11-22 | 石应华 | Broad-band phase shifter with adjustable positive slope and its usage |
| CN2550962Y (en) * | 2002-05-17 | 2003-05-14 | 顺泰电子科技有限公司 | Circuit device of wave trap |
| JP4279539B2 (en) * | 2002-11-13 | 2009-06-17 | 島田理化工業株式会社 | Resistance attenuator |
| US20090219117A1 (en) * | 2008-02-29 | 2009-09-03 | General Instrument Corporation | Plug-in device for signal correction |
| CN102365784A (en) * | 2009-02-09 | 2012-02-29 | 联合大学公司 | Reflectionless filters |
| CN103259501A (en) * | 2013-05-31 | 2013-08-21 | 电子科技大学 | Band elimination filter for communication system |
Non-Patent Citations (1)
| Title |
|---|
| 徐俊: "快速改变滤波器中心频率的几种实现方式", 《硅谷》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039737A (en) * | 2015-12-31 | 2017-08-11 | 英飞凌科技股份有限公司 | Passive equalizer for directional coupler |
| CN107039737B (en) * | 2015-12-31 | 2021-05-04 | 英飞凌科技股份有限公司 | Passive equalizer for directional coupler |
| CN110380228A (en) * | 2019-07-23 | 2019-10-25 | 中国科学技术大学 | A kind of wave absorbing device part based on reflectionless filter principle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103259501B (en) | A kind of band elimination filter for communication system | |
| CN104104349A (en) | Wireless filtering circuit | |
| CN104467727A (en) | Adjustable absorption type filter | |
| CN204068884U (en) | A kind of absorbing mode filter | |
| CN204216857U (en) | A kind of adjustable absorbing mode filter | |
| CN204206139U (en) | A kind of negative group delay circuitry | |
| CN204119188U (en) | A kind of Novel Filter | |
| CN104092445A (en) | Absorptive wave filter | |
| CN104378081A (en) | Absorption type filter | |
| CN104702237A (en) | Filter circuit based on resonator | |
| CN104143971A (en) | Negative group delay circuit | |
| CN104333339A (en) | Adjustable transformer | |
| CN204442305U (en) | A kind of filter circuit based on resonator | |
| CN204681323U (en) | A kind of easy tunable band-pass filter circuit | |
| CN204928769U (en) | Absorption type filter | |
| CN204465505U (en) | A kind of adjustable hybrid coupler circuit | |
| CN204481773U (en) | A kind of low-pass filter circuit | |
| CN204442340U (en) | A kind of easy variable coupler circuit | |
| CN204681324U (en) | A kind of duplexer circuit | |
| CN204046569U (en) | A kind of adjustable hybrid coupler circuit | |
| CN209787130U (en) | High-power band-pass filter | |
| CN204206123U (en) | A kind of chain type low-pass filter circuit | |
| CN105119583A (en) | Absorptive filter | |
| CN204465504U (en) | A kind of coupler circuit with the different degree of coupling | |
| CN204119177U (en) | A kind of wireless filter circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150325 |
|
| WD01 | Invention patent application deemed withdrawn after publication |