电子器件
電子器件
전자기건
JOURNAL OF ELECTRON DEVICES
2014年
5期
867-870
,共4页
谢绰%杨维明%杨武韬%李紫怡%卜力
謝綽%楊維明%楊武韜%李紫怡%蔔力
사작%양유명%양무도%리자이%복력
低通滤波器%共面波导%超宽阻带%缺陷地结构
低通濾波器%共麵波導%超寬阻帶%缺陷地結構
저통려파기%공면파도%초관조대%결함지결구
low-pass filter%CPW%ultra wide stop-band%defected ground structure
为了解决传统CPW低通滤波器尺寸偏大、阻带较窄和插入损耗偏大的问题,采用姿/4阶梯阻抗谐振单元( SIR)加载半圆形并联枝节( SISS)和缺陷地结构( DGS)单元的紧凑型结构设计了一个5阶CPW低通滤波器,分析了各单元结构参数对阻带性能的影响,引入微带线补偿方法对共面波导中心导体线特性阻抗进行局部补偿,改善了阻抗匹配性能,进一步降低了通带内的回波损耗和插入损耗。测试结果表明:该滤波器结构尺寸25 mm×18 mm,3 dB截止频率3.5 GHz,阻带范围3.8 GHz~17 GHz。实现了CPW低通滤波器的低插入损耗、超宽阻带和小型化。
為瞭解決傳統CPW低通濾波器呎吋偏大、阻帶較窄和插入損耗偏大的問題,採用姿/4階梯阻抗諧振單元( SIR)加載半圓形併聯枝節( SISS)和缺陷地結構( DGS)單元的緊湊型結構設計瞭一箇5階CPW低通濾波器,分析瞭各單元結構參數對阻帶性能的影響,引入微帶線補償方法對共麵波導中心導體線特性阻抗進行跼部補償,改善瞭阻抗匹配性能,進一步降低瞭通帶內的迴波損耗和插入損耗。測試結果錶明:該濾波器結構呎吋25 mm×18 mm,3 dB截止頻率3.5 GHz,阻帶範圍3.8 GHz~17 GHz。實現瞭CPW低通濾波器的低插入損耗、超寬阻帶和小型化。
위료해결전통CPW저통려파기척촌편대、조대교착화삽입손모편대적문제,채용자/4계제조항해진단원( SIR)가재반원형병련지절( SISS)화결함지결구( DGS)단원적긴주형결구설계료일개5계CPW저통려파기,분석료각단원결구삼수대조대성능적영향,인입미대선보상방법대공면파도중심도체선특성조항진행국부보상,개선료조항필배성능,진일보강저료통대내적회파손모화삽입손모。측시결과표명:해려파기결구척촌25 mm×18 mm,3 dB절지빈솔3.5 GHz,조대범위3.8 GHz~17 GHz。실현료CPW저통려파기적저삽입손모、초관조대화소형화。
A conventional coplanar waveguide( CPW) low pass filter( LPF) has a large area,a narrow stop-band and a high insert loss. To solve this problem,a miniaturized super wide stop-band 5-order CPW LPF is presented,which is composed of quarter wavelength stepped impedance resonators( SIR) and defected ground unit( DGS) cascaded by semicircle stepped impedance shunt stubs( SISS) . The effect of parameter variation of SIR,DGS and SISS on band-stop characteristic is studied. By introducing micro-strip line compensation methods to compensate the characteristic impedance of CPW center conductor line, which can improve the impedance matching performances, and further reduce the return loss and insertion loss in the pass-band. The tested results show that the size of the filter is 25 mmí18 mm,3 dB cut-off frequency is 3. 5 GHz,stop-band ranges from 3. 8 GHz to 17 GHz. Finally,a miniaturization CPW LPF with low insert loss and ultra wide stop-band is realized.