CN203104374U - Inductance-capacitance coupling resonance narrow-band band-pass filter - Google Patents
Inductance-capacitance coupling resonance narrow-band band-pass filter Download PDFInfo
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- CN203104374U CN203104374U CN 201320004436 CN201320004436U CN203104374U CN 203104374 U CN203104374 U CN 203104374U CN 201320004436 CN201320004436 CN 201320004436 CN 201320004436 U CN201320004436 U CN 201320004436U CN 203104374 U CN203104374 U CN 203104374U
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Abstract
Disclosed in the utility model is an inductance-capacitance coupling resonance narrow-band band-pass filter that comprises five LC resonance circuits, four coupling capacitors, and two matching inductors. The LC resonance circuits are formed by parallel connection of resonant capacitors and resonant inductors; the matching inductor Ls, the coupling capacitor C12, the coupling capacitor C23, the coupling capacitor C34, the coupling capacitor C45, and the matching inductor L1 are successively connected in series; the resonance circuit D1 is connected in parallel with the matching inductor Ls; the resonance circuit D2 is connected in parallel with the resonance circuit D1 and the coupling capacitor C12, wherein the resonance circuit D1 and the coupling capacitor C12 are connected in series; the resonant circuit D3 is connected in parallel with the resonant circuit D2 and the coupling capacitor C23, wherein the resonant circuit D2 and the coupling capacitor C23 are connected in series; the resonant circuit D4 is connected in parallel with the resonant circuit D3 and the coupling capacitor C34, wherein the resonant circuit D3 and the coupling capacitor C34 are connected in series; and the resonant circuit D5 is connected in parallel with the resonant circuit D4 and the coupling capacitor C45, wherein the resonant circuit D4 and the coupling capacitor C45 are connected in series. According to the utility model, the provided band-pass filter has the advantages of relatively narrow bandwidth, little bandwidth time delay, simple circuit structure and high circuit efficiency.
Description
Technical field
The utility model relates to a kind of inductant-capacitance coupling resonance narrow band filter.
Background technology
Filter is a kind of frequency selective device, it gives minimum decay to the signal of telecommunication in some or several frequency ranges, this part signal can be passed through smoothly, the signal of telecommunication in other frequency bands is then given very big decay, thereby stop this part signal to pass through as much as possible.Because using more in radio communication is bandpass signal, so that band pass filter just plays a part in wireless system is very important.Along with the progress of science and technology, wireless telecommunications system and system's prosperities day by day such as mobile phone, bluetooth, radio telephone, WLAN, various thereupon wireless telecommunications systems and system are also more and more higher to the requirement of band pass filter.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of relative bandwidth narrower, and the bandwidth time delay is littler, overall system performance is more superior, and circuit structure is simple, and volume is little, the circuit efficiency height, the cost cheapness is easy to the inductant-capacitance coupling resonance narrow band filter of processing.
The purpose of this utility model is achieved through the following technical solutions: inductant-capacitance coupling resonance narrow band filter, it comprises five LC resonant circuits, four coupling capacitances and two coupling inductance, described LC resonant circuit is composed in parallel by a resonant capacitance and a resonant inductance, coupling inductance L s, coupling capacitance C12, coupling capacitance C23, coupling capacitance C34, coupling capacitance C45 and coupling inductance L l connect successively, resonant circuit D1 is in parallel with coupling inductance L s, resonant circuit D2 and the resonant circuit D1 and the coupling capacitance C12 parallel connection of connecting mutually, resonant circuit D3 and the resonant circuit D2 and the coupling capacitance C23 parallel connection of connecting mutually, resonant circuit D4 and the resonant circuit D3 and the coupling capacitance C34 parallel connection of connecting mutually, resonant circuit D5 and the resonant circuit D4 and the coupling capacitance C45 parallel connection of connecting mutually.
The beneficial effects of the utility model are:
1) the utility model relative bandwidth is narrower, and the bandwidth time delay is littler, and overall system performance is more superior;
2) the logical narrow the utility model circuit structure of the utility model band is simple, and volume is little, the circuit efficiency height, and the cost cheapness is easy to processing.
Description of drawings
Fig. 1 is the utility model circuit structure diagram;
Fig. 2 is LC resonant circuit structure figure.
Embodiment
Below in conjunction with accompanying drawing the technical solution of the utility model is described in further detail: as shown in Figure 1, inductant-capacitance coupling resonance narrow band filter, it comprises five LC resonant circuits, four coupling capacitances and two coupling inductance, described LC resonant circuit is composed in parallel by a resonant capacitance and a resonant inductance, coupling inductance L s, coupling capacitance C12, coupling capacitance C23, coupling capacitance C34, coupling capacitance C45 and coupling inductance L l connect successively, resonant circuit D1 is in parallel with coupling inductance L s, resonant circuit D2 and the resonant circuit D1 and the coupling capacitance C12 parallel connection of connecting mutually, resonant circuit D3 and the resonant circuit D2 and the coupling capacitance C23 parallel connection of connecting mutually, resonant circuit D4 and the resonant circuit D3 and the coupling capacitance C34 parallel connection of connecting mutually, resonant circuit D5 and the resonant circuit D4 and the coupling capacitance C45 parallel connection of connecting mutually.
Claims (1)
1. inductant-capacitance coupling resonance narrow band filter, it is characterized in that: it comprises five LC resonant circuits, four coupling capacitances and two coupling inductance, described LC resonant circuit is composed in parallel by a resonant capacitance and a resonant inductance, coupling inductance L s, coupling capacitance C12, coupling capacitance C23, coupling capacitance C34, coupling capacitance C45 and coupling inductance L l connect successively, resonant circuit D1 is in parallel with coupling inductance L s, resonant circuit D2 and the resonant circuit D1 and the coupling capacitance C12 parallel connection of connecting mutually, resonant circuit D3 and the resonant circuit D2 and the coupling capacitance C23 parallel connection of connecting mutually, resonant circuit D4 and the resonant circuit D3 and the coupling capacitance C34 parallel connection of connecting mutually, resonant circuit D5 and the resonant circuit D4 and the coupling capacitance C45 parallel connection of connecting mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320004436 CN203104374U (en) | 2013-01-06 | 2013-01-06 | Inductance-capacitance coupling resonance narrow-band band-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320004436 CN203104374U (en) | 2013-01-06 | 2013-01-06 | Inductance-capacitance coupling resonance narrow-band band-pass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203104374U true CN203104374U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320004436 Expired - Lifetime CN203104374U (en) | 2013-01-06 | 2013-01-06 | Inductance-capacitance coupling resonance narrow-band band-pass filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203104374U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070189A (en) * | 2017-04-11 | 2017-08-18 | 北京北广科技股份有限公司 | A kind of filter circuit in radio-frequency power supply detecting circuit |
| CN108023568A (en) * | 2016-10-31 | 2018-05-11 | 株式会社村田制作所 | Filter apparatus, multiplexer, high frequency front end circuit and communicator |
| CN108318730A (en) * | 2018-03-30 | 2018-07-24 | 成都众宜天成科技有限公司 | A kind of communication power supply voltage detecting circuit |
| CN111049498A (en) * | 2019-12-26 | 2020-04-21 | 福州瑞芯微电子股份有限公司 | Narrow-band-pass filter circuit and filter |
| CN112367057A (en) * | 2020-11-09 | 2021-02-12 | 中国科学院微电子研究所 | Frequency hopping filter with composite structure and adjusting method thereof |
-
2013
- 2013-01-06 CN CN 201320004436 patent/CN203104374U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023568A (en) * | 2016-10-31 | 2018-05-11 | 株式会社村田制作所 | Filter apparatus, multiplexer, high frequency front end circuit and communicator |
| CN107070189A (en) * | 2017-04-11 | 2017-08-18 | 北京北广科技股份有限公司 | A kind of filter circuit in radio-frequency power supply detecting circuit |
| CN108318730A (en) * | 2018-03-30 | 2018-07-24 | 成都众宜天成科技有限公司 | A kind of communication power supply voltage detecting circuit |
| CN111049498A (en) * | 2019-12-26 | 2020-04-21 | 福州瑞芯微电子股份有限公司 | Narrow-band-pass filter circuit and filter |
| CN112367057A (en) * | 2020-11-09 | 2021-02-12 | 中国科学院微电子研究所 | Frequency hopping filter with composite structure and adjusting method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |