CN204046534U - A kind of small size C-band LC filter circuit - Google Patents
A kind of small size C-band LC filter circuit Download PDFInfo
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- CN204046534U CN204046534U CN201420328479.7U CN201420328479U CN204046534U CN 204046534 U CN204046534 U CN 204046534U CN 201420328479 U CN201420328479 U CN 201420328479U CN 204046534 U CN204046534 U CN 204046534U
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Abstract
The utility model discloses a kind of small size C-band LC filter circuit, it is made up of Chebyshev's elliptic function high pass unit and Chebyshev's elliptic function low pass unit, described Chebyshev's elliptic function high pass unit is made up of multiple LC series resonant circuit, connected by a coupling capacitance between LC series resonant circuit, described Chebyshev's elliptic function low pass unit is made up of more piece LC coupling circuit in parallel, directly connect between LC coupling circuit, each joint LC coupling circuit is provided with filter strays to be held.The inductance that the utility model adopts and electric capacity are particular design, and this filter circuit is provided with, and Insertion Loss is little, standing wave is little, are easy to manufacture, failure rate is low, safe and reliable, the advantage that meets ROHS standard.
Description
Technical field
The utility model relates to a kind of small size C-band LC filter circuit.
Background technology
LC filter, also referred to as passive filter, is traditional harmonic compensation device.Why LC filter is called passive filter, as the term suggests, be exactly that this device does not need additionally to provide power supply.LC filter is generally form by filtering capacitor, reactor and resistor are appropriately combined, in parallel with harmonic source, except strobing, also takes into account the needs of reactive power compensation;
Passive filter, also known as LC filter, it is the filter circuit utilizing the Combination Design of inductance, electric capacity and resistance to form, can filtering once or multiple harmonic, the most common passive filter structure being easy to adopt is by inductance and capacitances in series, can form low impedance by-pass to main subharmonic (3,5,7); Single tuned filter, double-tuned filter, high pass filter all belong to passive filter.
Passive LC circuit is not easy of integration, and the filter circuit in usual power supply after rectification all adopts passive circuit, and should adopt lc circuit when large current load.
Filter is parts crucial in communication system, and 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.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides that a kind of volume is little, assembling is simple, reliability is high, debug simple C-band LC filter circuit.
The purpose of this utility model is achieved through the following technical solutions: a kind of small size C-band LC filter circuit, it is made up of Chebyshev's elliptic function high pass unit and Chebyshev's elliptic function low pass unit, described Chebyshev's elliptic function high pass unit is made up of multiple LC series resonant circuit, connected by a coupling capacitance between LC series resonant circuit, described Chebyshev's elliptic function low pass unit is made up of more piece LC coupling circuit in parallel, directly connect between LC coupling circuit, each joint LC coupling circuit is provided with filter strays to be held.
Described electric capacity is the ATC electric capacity that employing 0805 encapsulates.
Described inductance is the air core inductor adopting the enamelled wire of φ 0.31 to be coiled into.
The beneficial effects of the utility model are:
(1) inductance adopted and electric capacity are particular design, and this filter circuit is provided with, and Insertion Loss is little, standing wave is little, are easy to manufacture, failure rate is low, safe and reliable, the advantage that meets ROHS standard;
(2) adopt special circuit structure, make output waveform more precipitous, and Out-of-band rejection can reach best effect;
(3) stable performance, can steady operation under various weather conditions and environment, and can ensure that all electrical performance indexes are all good, improves stability and the reliability of circuit.
Accompanying drawing explanation
Fig. 1 is the utility model circuit diagram.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail, but protection range of the present utility model is not limited to the following stated.
As shown in Figure 1, a kind of small size C-band LC filter circuit, it is made up of Chebyshev's elliptic function high pass unit and Chebyshev's elliptic function low pass unit, described Chebyshev's elliptic function high pass unit is made up of multiple LC series resonant circuit, connected by a coupling capacitance between LC series resonant circuit, described Chebyshev's elliptic function low pass unit is made up of more piece LC coupling circuit in parallel, directly connect between LC coupling circuit, each joint LC coupling circuit is provided with filter strays to be held.
Described electric capacity is the ATC electric capacity that employing 0805 encapsulates.
Described inductance is the air core inductor adopting the enamelled wire of φ 0.31 to be coiled into.
Concrete, described a kind of small size C-band LC filter circuit comprises the resonant element of the minimum Ind of Chebyshev and the coupling unit of the minimum Ind of Chebyshev, the resonant element of the minimum Ind of Chebyshev comprises electric capacity C1 to C11, inductance L 1 to L5, electric capacity C1 sequentially passes through electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5 is connected with electric capacity C6, electric capacity C1 and the public connecting end of electric capacity C2 also sequentially pass through the inductance L 1 and electric capacity C7 ground connection of connecting, electric capacity C2 and the public connecting end of electric capacity C3 also sequentially pass through the inductance L 2 and electric capacity C8 ground connection of connecting, electric capacity C3 and the public connecting end of electric capacity C4 also sequentially pass through the inductance L 3 and electric capacity C9 ground connection of connecting, electric capacity C4 and the public connecting end of electric capacity C5 also sequentially pass through the inductance L 4 and electric capacity C10 ground connection of connecting, electric capacity C5 and the public connecting end of electric capacity C6 also sequentially pass through the inductance L 5 and electric capacity C11 ground connection of connecting,
The coupling unit of the minimum Ind of described Chebyshev comprises electric capacity C12 to C24 and inductance L 6 to L11, electric capacity C13 sequentially passes through electric capacity C14, electric capacity C15, electric capacity C16, electric capacity C17 is connected with electric capacity C18, by electric capacity C12 ground connection between electric capacity C13 and input, the public connecting end of electric capacity C13 and electric capacity C14 is by electric capacity C19 ground connection, the public connecting end of electric capacity C14 and electric capacity C15 is by electric capacity C20 ground connection, the public connecting end of electric capacity C15 and electric capacity C16 is by electric capacity C21 ground connection, the public connecting end of electric capacity C16 and electric capacity C17 is by electric capacity C22 ground connection, the public connecting end of electric capacity C17 and electric capacity C18 is by electric capacity C23 ground connection, by electric capacity C24 ground connection between electric capacity C18 and output, inductance L 6 is in parallel in parallel with electric capacity C13, inductance L 7 is in parallel in parallel with electric capacity C14, inductance L 8 is in parallel in parallel with electric capacity C15, inductance L 9 is in parallel in parallel with electric capacity C16, inductance L 10 is in parallel in parallel with electric capacity C17, inductance L 11 is in parallel in parallel with electric capacity C18.
The operating frequency of this C-band LC filter is: 4300 ~ 4800MHz; Out-of-band rejection is: 100 ~ 3700MHz >=50dBc, 5000 ~ 8000MHz >=40dBc; Insertion Loss≤4.0dB; Standing wave (S11, S22)≤1.5.
What select is the sheet material of polytetrafluoroethylene, inductance is the air core inductor, the ATC electric capacity with 0805 encapsulation that are coiled into the enamelled wire of φ 0.31; And during debugging, the inductance sky of low pass filter air core inductor over there is all turned to and oneself namely makes inductance reach maximum, so just can make the effect that Out-of-band rejection reaches best.
The above is only preferred implementation of the present utility model, be to be understood that the utility model is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from spirit and scope of the present utility model, then all should in the protection range of the utility model claims.
Claims (3)
1. a small size C-band LC filter circuit, it is characterized in that: it is made up of Chebyshev's elliptic function high pass unit and Chebyshev's elliptic function low pass unit, described Chebyshev's elliptic function high pass unit is made up of multiple LC series resonant circuit, connected by a coupling capacitance between LC series resonant circuit, described Chebyshev's elliptic function low pass unit is made up of more piece LC coupling circuit in parallel, directly connect between LC coupling circuit, each joint LC coupling circuit is provided with filter strays to be held.
2. a kind of small size C-band LC filter circuit according to claim 1, is characterized in that: described electric capacity is the ATC electric capacity that employing 0805 encapsulates.
3. a kind of small size C-band LC filter circuit according to claim 1, is characterized in that: described inductance is the air core inductor adopting the enamelled wire of φ 0.31 to be coiled into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420328479.7U CN204046534U (en) | 2014-06-19 | 2014-06-19 | A kind of small size C-band LC filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420328479.7U CN204046534U (en) | 2014-06-19 | 2014-06-19 | A kind of small size C-band LC filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204046534U true CN204046534U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420328479.7U Expired - Fee Related CN204046534U (en) | 2014-06-19 | 2014-06-19 | A kind of small size C-band LC filter circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152686A (en) * | 2017-12-12 | 2018-06-12 | 山东电力设备有限公司 | A kind of low voltage impulse experimental rig of transformer coil |
| CN109104164A (en) * | 2018-10-16 | 2018-12-28 | 深圳飞骧科技有限公司 | A kind of IPD filter and its strengthen filtering framework |
| CN116260417A (en) * | 2023-05-16 | 2023-06-13 | 成都频岢微电子有限公司 | Single-resonator filter, multi-resonator filter and radio frequency front-end module |
-
2014
- 2014-06-19 CN CN201420328479.7U patent/CN204046534U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152686A (en) * | 2017-12-12 | 2018-06-12 | 山东电力设备有限公司 | A kind of low voltage impulse experimental rig of transformer coil |
| CN109104164A (en) * | 2018-10-16 | 2018-12-28 | 深圳飞骧科技有限公司 | A kind of IPD filter and its strengthen filtering framework |
| CN116260417A (en) * | 2023-05-16 | 2023-06-13 | 成都频岢微电子有限公司 | Single-resonator filter, multi-resonator filter and radio frequency front-end module |
| CN116260417B (en) * | 2023-05-16 | 2023-07-11 | 成都频岢微电子有限公司 | Single-resonator filter, multi-resonator filter and radio frequency front-end module |
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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: 20141224 Termination date: 20160619 |