CN204442305U - A kind of filter circuit based on resonator - Google Patents
A kind of filter circuit based on resonator Download PDFInfo
- Publication number
- CN204442305U CN204442305U CN201520170291.9U CN201520170291U CN204442305U CN 204442305 U CN204442305 U CN 204442305U CN 201520170291 U CN201520170291 U CN 201520170291U CN 204442305 U CN204442305 U CN 204442305U
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- Prior art keywords
- resonator
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- port
- filter circuit
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Abstract
The utility model discloses a kind of filter circuit based on resonator, this circuit structure is all by parallel connection
resonant element realizes.The utility model can be widely used in WLAN 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, the utility model realizes the bandpass filtering of a kind of ultra broadband, linear phase, and can apply in the middle of wireless WLAN communications system.
Description
Technical field
The utility model relates to a kind of filter circuit, particularly a kind of filter circuit based on resonator, belongs to communication and electronic application field, in mobile communication and radio circuit, has important application.
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.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 is for above problem, adopt and all realize band pass filter by resonator, effectively can solve bandwidth, linear phase problem, to meet system requirements, and stability is high, volume is little, compact conformation, processing are simple, is suitable among wireless WLAN mobile communication and radio system.
Summary of the invention
The utility model provides the wireless WLAN mobile communication and radio system bandwidth-limited circuit that a kind of ultra broadband, linear phase, structure are simple, volume is little, stability is high.
The technical scheme realizing the utility model object is a kind of filter circuit based on resonator, comprises input port 1 (Port1), output port 2 (Port2), five parallel resonance unit
,
,
,
and
; Wherein in parallel
one end of resonator is connected with input port 1 (Port1), and the other end is connected with output port 2 (Port2); Parallel resonance unit
one end be connected with port one (Port1), the other end is connected to the ground and connects; Parallel resonance unit
one end be connected with port one (Port1), the other end is connected to the ground and connects; Parallel resonance unit
one end be connected with port 2 (Port2), the other end is connected to the ground and connects; Parallel resonance unit
one end be connected with port 2 (Port2), the other end is connected to the ground and connects; Input port 1 (Port1), output port 2 (Port2) all connect 1.5 ohmages.
Compared with prior art, the utility model provides the feature that a kind of ultra broadband, linear phase, structure are simple, compact conformation, stability are high.
Accompanying drawing explanation
Fig. 1 is a kind of filter circuit figure based on resonator of the utility model.
Fig. 2 is a kind of filter circuit S parameter performance diagram based on resonator of the utility model.
Fig. 3 is a kind of filter circuit phase characteristic curve figure based on resonator of the utility model.
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 passband filter circuit, comprises input port 1 (Port1), output port 2 (Port2), five parallel resonance unit
,
,
,
and
; Wherein in parallel
one end of resonator is connected with input port 1 (Port1), and the other end is connected with output port 2 (Port2); Parallel resonance unit
one end be connected with port one (Port1), the other end is connected to the ground and connects; Parallel resonance unit
one end be connected with port one (Port1), the other end is connected to the ground and connects; Parallel resonance unit
one end be connected with port 2 (Port2), the other end is connected to the ground and connects; Parallel resonance unit
one end be connected with port 2 (Port2), the other end is connected to the ground and connects; Input port 1 (Port1), output port 2 (Port2) all connect 1.5 ohmages.
This circuit structure is all by parallel connection
resonator is formed, and passband central frequency is respectively 3.1GHz, and three dB bandwidth is 2GHz, is mainly used in wireless WLAN communications system;
Composition graphs 2, can find out, passband central frequency is 3.1GHz respectively, and its three dB bandwidth is 2GHz, can realize wider bandwidth, has ultra broadband, the most flat amplitude-frequency characteristic; Composition graphs 3, can find out, this filter circuit has linear phase characteristic.This kind of ultra broadband, linear phase band pass filter can be used in wireless WLAN mobile communication, and 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, effectively overcome the ultra broadband of conventional filter, linear phase problem.Can ensure that device obtains best channel signal transmission effect.
Claims (2)
1. based on a filter circuit for resonator, it is characterized in that: comprise input port 1 (Port1), output port 2 (Port2), five parallel resonance unit
,
,
,
and
; Wherein in parallel
one end of resonator is connected with input port 1 (Port1), and the other end is connected with output port 2 (Port2); Parallel resonance unit
one end be connected with port one (Port1), the other end is connected to the ground and connects; Parallel resonance unit
one end be connected with port one (Port1), the other end is connected to the ground and connects; Parallel resonance unit
one end be connected with port 2 (Port2), the other end is connected to the ground and connects; Parallel resonance unit
one end be connected with port 2 (Port2), the other end is connected to the ground and connects; Input port 1 (Port1), output port 2 (Port2) all connect 1.5 ohmages.
2., according to a kind of filter circuit based on resonator described in claim 1, it is characterized in that: this circuit structure is all by parallel connection
resonator is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520170291.9U CN204442305U (en) | 2015-03-25 | 2015-03-25 | A kind of filter circuit based on resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520170291.9U CN204442305U (en) | 2015-03-25 | 2015-03-25 | A kind of filter circuit based on resonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204442305U true CN204442305U (en) | 2015-07-01 |
Family
ID=53610117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520170291.9U Expired - Fee Related CN204442305U (en) | 2015-03-25 | 2015-03-25 | A kind of filter circuit based on resonator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204442305U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702237A (en) * | 2015-03-25 | 2015-06-10 | 徐园园 | Filter circuit based on resonator |
-
2015
- 2015-03-25 CN CN201520170291.9U patent/CN204442305U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702237A (en) * | 2015-03-25 | 2015-06-10 | 徐园园 | Filter circuit based on resonator |
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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: 20150701 Termination date: 20160325 |