提出了一种可切换固定带宽的可调频率带通滤波器新结构,且实现了在带宽切换前后都能保持固定带宽的特性。基于谐振线间的耦合系数提取算法,参考滤波器综合理论,设计并加工了工作频段为1.3~1.45 GHz的开环微带谐振可切换带宽的可调频率...提出了一种可切换固定带宽的可调频率带通滤波器新结构,且实现了在带宽切换前后都能保持固定带宽的特性。基于谐振线间的耦合系数提取算法,参考滤波器综合理论,设计并加工了工作频段为1.3~1.45 GHz的开环微带谐振可切换带宽的可调频率带通滤波器。测试结果表明,在整个工作频段内,3 d B带宽在切换前后分别为120 MHz、100 MHz和80 MHz,对应的插入损耗各是-2.9 d B、-2.4 d B、-2.6 d B,测试结果与仿真结果吻合良好。该滤波器具有结构简单、加工难度低、体积小、馈电控制简单等优点。展开更多
O438．2 2006065115滤波器带宽对傅里叶剪切干涉法精度的影响=Analysis of Fourier shear interferometry based on LSI[刊,中]/毕振波(中科院安徽光机所．安徽,合肥(230031)),范承玉…//量子电子学报．—2006,23(3)．—316—319研究了...O438．2 2006065115滤波器带宽对傅里叶剪切干涉法精度的影响=Analysis of Fourier shear interferometry based on LSI[刊,中]/毕振波(中科院安徽光机所．安徽,合肥(230031)),范承玉…//量子电子学报．—2006,23(3)．—316—319研究了基于横向剪切干涉仪的傅里叶剪切干涉方法,对频域中条纹频谱的分布进行了分析。展开更多
A novel discrete-time reaching law was proposed for uncertain discrete-time system,which contained process noise and measurement noise.The proposed method reserves all the advantages of discrete-time reaching law,whic...A novel discrete-time reaching law was proposed for uncertain discrete-time system,which contained process noise and measurement noise.The proposed method reserves all the advantages of discrete-time reaching law,which not only decreases the band width of sliding mode and strengthens the system robustness,but also improves the dynamic performance and stability capability of the system.Moreover,a discrete-time sliding mode control strategy based on Kalman filter method was designed,and Kalman filter was employed to eliminate the influence of system noise.Simulation results show that there is no chattering phenomenon in the output of controller and the state variables of controlled system,and the proposed algorithm is also feasible and has strong robustness to external disturbances.展开更多
文摘提出了一种可切换固定带宽的可调频率带通滤波器新结构,且实现了在带宽切换前后都能保持固定带宽的特性。基于谐振线间的耦合系数提取算法,参考滤波器综合理论,设计并加工了工作频段为1.3~1.45 GHz的开环微带谐振可切换带宽的可调频率带通滤波器。测试结果表明,在整个工作频段内,3 d B带宽在切换前后分别为120 MHz、100 MHz和80 MHz,对应的插入损耗各是-2.9 d B、-2.4 d B、-2.6 d B,测试结果与仿真结果吻合良好。该滤波器具有结构简单、加工难度低、体积小、馈电控制简单等优点。
文摘O438．2 2006065115滤波器带宽对傅里叶剪切干涉法精度的影响=Analysis of Fourier shear interferometry based on LSI[刊,中]/毕振波(中科院安徽光机所．安徽,合肥(230031)),范承玉…//量子电子学报．—2006,23(3)．—316—319研究了基于横向剪切干涉仪的傅里叶剪切干涉方法,对频域中条纹频谱的分布进行了分析。
基金Project(50721063) supported by the National Natural Science Foundation of China
文摘A novel discrete-time reaching law was proposed for uncertain discrete-time system,which contained process noise and measurement noise.The proposed method reserves all the advantages of discrete-time reaching law,which not only decreases the band width of sliding mode and strengthens the system robustness,but also improves the dynamic performance and stability capability of the system.Moreover,a discrete-time sliding mode control strategy based on Kalman filter method was designed,and Kalman filter was employed to eliminate the influence of system noise.Simulation results show that there is no chattering phenomenon in the output of controller and the state variables of controlled system,and the proposed algorithm is also feasible and has strong robustness to external disturbances.
