Title :
Optimization design of passive filter´s phase-frequency characteristic
Author :
Ma, Hongmei ; Li, Peng ; Xue, Weining
Author_Institution :
Dept. of Electron. Inf., North China Inst. of Sci. & Technol., Yanjiao East of Beijing, China
Abstract :
In order to solve contradiction between the filter amplitude-frequency and the phase-frequency straightness, this paper proposes a filter´s optimal design method. Based on the circuit designed by network synthesis method, the phase-frequency approach to a straight line using a least square method. Then optimize the circuit again by unconstrained optimization method. The simulation result indicates that this method can not only increase the filter the attenuation in stopband, but also the group delay is 12% of the total before optimized in passband, and the optimal design method is superior to the network synthesis method.
Keywords :
least mean squares methods; network synthesis; passive filters; circuit design; filter amplitude-frequency; filter design; least square method; network synthesis method; passive filter; phase-frequency straightness; Circuits; Design methodology; Design optimization; Frequency; Information filtering; Information filters; Network synthesis; Optimization methods; Passive filters; Voltage; filter; optimization design; phase-frequency;
Conference_Titel :
Communications Technology and Applications, 2009. ICCTA '09. IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4816-6
Electronic_ISBN :
978-1-4244-4817-3
DOI :
10.1109/ICCOMTA.2009.5349101
