CN101950829B - Miniature dual-stop band microstrip filter - Google Patents
Miniature dual-stop band microstrip filter Download PDFInfo
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- CN101950829B CN101950829B CN 201010508463 CN201010508463A CN101950829B CN 101950829 B CN101950829 B CN 101950829B CN 201010508463 CN201010508463 CN 201010508463 CN 201010508463 A CN201010508463 A CN 201010508463A CN 101950829 B CN101950829 B CN 101950829B
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- dgs
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- stop band
- filter
- grounding structure
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Abstract
本发明公布了一种小型化双阻带微带线滤波器，在接地板上蚀刻出一个DGS，在DGS的缝隙中加入一个SRR；在中央传输线和接地板之间填充介电常数为ε=2.6的介质板。本发明为一平面微带线式双阻带滤波器。具有3.62GHz到5.19GHz和6.13GHz到8.37GHz.两个阻带。结构采用平面技术将SRR置于DGS缝隙中，所以与传统双阻带滤波器比较傲，尺寸非常小。SRR置于DGS缝隙中，由于两者都具有谐振作用，所以产生两个阻带。并且因为两者的耦合作用，当将DGS缝隙宽度增大时，两个阻带的中心频率会减小。
The present invention discloses a miniaturized double-stop band microstrip line filter. A DGS is etched on the ground plate, and an SRR is added in the gap of the DGS; the dielectric constant between the central transmission line and the ground plate is filled with ε= 2.6 dielectric boards. The invention is a planar microstrip line type double stop band filter. With 3.62GHz to 5.19GHz and 6.13GHz to 8.37GHz. Two stop bands. The structure uses planar technology to place the SRR in the gap of the DGS, so compared with the traditional double stop band filter, the size is very small. The SRR is placed in the DGS gap, and since both have resonance effects, two stop bands are generated. And because of the coupling effect of the two, when the width of the DGS slit is increased, the center frequencies of the two stopbands will decrease.
Description
Technical field
The present invention relates to a kind of Miniature dual-stop band microstrip filter, belong to the technical field of microwave communication signal transmission microstripline filter.
Background technology
Existing dual-attenuation filter stock size is larger.(Defected Ground Structure---stop-band filter DGS) generally only has a stopband, and the centre frequency of this stopband can increase along with the width in the slit of DGS in the structure and reduce and based on defect grounding structure.
Summary of the invention
The present invention seeks to provides a kind of Miniature dual-stop band microstrip filter for the defective that prior art exists, in the slit of DGS, add a rectangle SRR(split ring resonators) structure, two stopbands have been realized, and when increasing the DGS gap width (because SRR is arranged in the slit, so SRR and DGS gap width increase simultaneously) time, the centre frequency of two stopbands does not increase on the contrary and reduces.Because using planar technique SRR to be embedded in the slit of DGS, obviously reduce with same conventional filter comparative structure size.
The present invention adopts following technical scheme for achieving the above object:
Miniature dual-stop band microstrip filter of the present invention etches a DGS at ground plate, adds a SRR in the slit of DGS; Filling dielectric constant between central transmission line and ground plate is the dielectric-slab of ε=2.6.
The present invention is a planar microstrip line formula dual-attenuation filter.Has 3.62GHz to 5.19 GHz and 6.13 GHz to two stopbands of 8.37 GHz..Its advantage is:
1. because structure adopts planar technique SRR is placed the DGS slit, so more proud with the traditional double stop-band filter, size is very little.
2. because SRR places the DGS slit, owing to both having resonance effect, so produce two stopbands.And because both couplings, when the DGS gap width was increased, the centre frequency of two stopbands can reduce (Fig. 4).And traditional DGS filter only has a stopband, and the DGS gap width is when increasing, and the stopband center frequency can increase.
Description of drawings
Fig. 1: structure chart of the present invention.
Fig. 2: the present invention and the S parameters simulation that only has the DGS structure be comparison diagram as a result.
The body structure surface current distributing figure of Fig. 3: 4.64GHz and 6.68GHz.
Fig. 4: centre frequency oscillogram.
Fig. 5: simulation result figure of the present invention.
Embodiment
As shown in Figure 1, in the cellular construction, etch a DGS(Defected Ground Structure at ground plate), in the slit of DGS, add a SRR (split-ring resonators).Filling dielectric constant between central transmission line and ground plate is the dielectric-slab of ε=2.6.Fig. 2 is that this structure and the S parameters simulation result who only has the DGS structure compare.Wherein red line is traditional DGS stop-band filter, only has a stopband, and its centre frequency is 7.43GHz.And blue line represents the design's S parameters simulation result.Have two stopbands.The centre frequency of the first stopband is 4.64 GHz, and the centre frequency of the second stopband is 6.68GHz.Fig. 3 is the body structure surface current distributing figure of 4.64GHz and 6.68GHz.As can be seen from Figure 3, when frequency was 4.64GHz, the electric current at DGS edge obviously was better than the SRR edge current, caused so first stopband is DGS resonance.And when frequency was 6.68GHz, the SRR edge current was better than again the DGS edge current, so the second stopband is caused by SRR resonance.This structure places the DGS slit with the SRR structure for the first time, and the structure of this novelty has produced special result just.Fig. 4 is the centre frequency oscillogram.Fig. 5 is that sample test and the simulation result of the design's structure compares.
Claims (1)
1. a Miniature dual-stop band microstrip filter is characterized in that etching a defect grounding structure at ground plate, adds a rectangular aperture resonant ring in the slit of defect grounding structure; Described defect grounding structure is traditional dumbbell shape defect grounding structure; Nested forming inside and outside the straight-flanked ring of described split ring resonator by two end openings, the opening direction of described two straight-flanked rings is opposite; Filling dielectric constant between central transmission line and ground plate is
=2.6 dielectric-slab; Described microstripline filter has two stopbands, and the mat woven of fine bamboo strips one stopband causes by defect grounding structure resonance, and the second stopband is caused by rectangular aperture resonant ring resonance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010508463 CN101950829B (en) | 2010-10-15 | 2010-10-15 | Miniature dual-stop band microstrip filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010508463 CN101950829B (en) | 2010-10-15 | 2010-10-15 | Miniature dual-stop band microstrip filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101950829A CN101950829A (en) | 2011-01-19 |
| CN101950829B true CN101950829B (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010508463 Expired - Fee Related CN101950829B (en) | 2010-10-15 | 2010-10-15 | Miniature dual-stop band microstrip filter |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280616B (en) * | 2013-05-10 | 2015-04-15 | 南京信息工程大学 | Double-passband filter with left-hand performance |
| CN110265757B (en) * | 2019-07-24 | 2023-12-19 | 南京信息工程大学 | A microstrip bandpass filter for WLAN frequency band |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471479A (en) * | 2007-12-26 | 2009-07-01 | 中国科学院电子学研究所 | Zero order resonator, narrow band filter and optimum design method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100538889B1 (en) * | 2003-02-10 | 2005-12-26 | 임종식 | A New Type of Low Pass Filters Using Defected Ground Structure and Capacitively Compensated Transmission Line |
| KR100623517B1 (en) * | 2005-05-24 | 2006-09-13 | 순천향대학교 산학협력단 | Microwave resonators with a defect structure etched into the ground plane of the dielectric |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471479A (en) * | 2007-12-26 | 2009-07-01 | 中国科学院电子学研究所 | Zero order resonator, narrow band filter and optimum design method |
Non-Patent Citations (2)
| Title |
|---|
| 一种新颖的开口环地面缺陷结构低通滤波器;付树洪,童创明,李西敏;《电波科学学报》;20091230;第24卷(第6期);全文 * |
| 付树洪,童创明,李西敏.一种新颖的开口环地面缺陷结构低通滤波器.《电波科学学报》.2009,第24卷(第6期), |
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| CN101950829A (en) | 2011-01-19 |
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