CN104702237A - Filter circuit based on resonator - Google Patents
Filter circuit based on resonator Download PDFInfo
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- CN104702237A CN104702237A CN201510132332.XA CN201510132332A CN104702237A CN 104702237 A CN104702237 A CN 104702237A CN 201510132332 A CN201510132332 A CN 201510132332A CN 104702237 A CN104702237 A CN 104702237A
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- filter circuit
- resonator
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- port2
- port1
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Abstract
The invention discloses a filter circuit based on a resonator. The whole circuit structure is achieved by resonance units which are connected in parallel as shown in the specification. The filter circuit can be widely applied to places with strict requirements on signal performances such as a WLAN mobile communication power amplifier and a radar antenna. The filter circuit can inhibit external noise and improve the stability of an electronic circuit; compared with the band pass filter circuit of other structure, the filter circuit based on the resonator achieves ultra-broadband and linear phase band pass filter and can be applied to a wireless WLAN communication system.
Description
Technical field
The present invention relates to a kind of filter circuit, particularly a kind of filter circuit based on resonator, belong to communication and electronic application field, in mobile communication and radio circuit, there is 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 present invention is directed to 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 invention provides a kind of ultra broadband, linear phase, structure is simple, volume is little, stability is high wireless WLAN mobile communication and radio system bandwidth-limited circuit.
The technical scheme realizing the object of the invention 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 invention provides a kind of ultra broadband, linear phase, structure is simple, compact conformation, stability are high feature.
Accompanying drawing explanation
Fig. 1 is a kind of filter circuit figure based on resonator of the present invention.
Fig. 2 is a kind of filter circuit S parameter performance diagram based on resonator of the present invention.
Fig. 3 is a kind of filter circuit phase characteristic curve figure based on resonator of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Composition graphs 1, the present invention 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 |
|---|---|---|---|
| CN201510132332.XA CN104702237A (en) | 2015-03-25 | 2015-03-25 | Filter circuit based on resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510132332.XA CN104702237A (en) | 2015-03-25 | 2015-03-25 | Filter circuit based on resonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104702237A true CN104702237A (en) | 2015-06-10 |
Family
ID=53349063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510132332.XA Pending CN104702237A (en) | 2015-03-25 | 2015-03-25 | Filter circuit based on resonator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104702237A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471403A (en) * | 2016-01-20 | 2016-04-06 | 谷林超 | Distributed filter circuit |
| CN105490658A (en) * | 2016-02-01 | 2016-04-13 | 徐园园 | Dual-bandstop filter circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04284606A (en) * | 1991-03-13 | 1992-10-09 | Tdk Corp | Filter element |
| US20090224849A1 (en) * | 2008-03-04 | 2009-09-10 | Samsung Electro-Mechanics Co., Ltd. | Band pass filter |
| CN103281046A (en) * | 2013-01-30 | 2013-09-04 | 王少夫 | Implementation method for band-pass filter with double out-of-band transmission zeros |
| CN104104349A (en) * | 2014-08-03 | 2014-10-15 | 王少夫 | Wireless filtering circuit |
| CN204442305U (en) * | 2015-03-25 | 2015-07-01 | 徐园园 | A kind of filter circuit based on resonator |
-
2015
- 2015-03-25 CN CN201510132332.XA patent/CN104702237A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04284606A (en) * | 1991-03-13 | 1992-10-09 | Tdk Corp | Filter element |
| US20090224849A1 (en) * | 2008-03-04 | 2009-09-10 | Samsung Electro-Mechanics Co., Ltd. | Band pass filter |
| CN103281046A (en) * | 2013-01-30 | 2013-09-04 | 王少夫 | Implementation method for band-pass filter with double out-of-band transmission zeros |
| CN104104349A (en) * | 2014-08-03 | 2014-10-15 | 王少夫 | Wireless filtering circuit |
| CN204442305U (en) * | 2015-03-25 | 2015-07-01 | 徐园园 | A kind of filter circuit based on resonator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471403A (en) * | 2016-01-20 | 2016-04-06 | 谷林超 | Distributed filter circuit |
| CN105490658A (en) * | 2016-02-01 | 2016-04-13 | 徐园园 | Dual-bandstop filter circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150610 |