Title :
Circuit direct replacement method enhanced skirt response of open stub low-pass filter
Author :
Tseng, Jan-Dong ; Wei-Ting Liu
Abstract :
An interdigital low-pass structure directly replacing center open stub of odd-order open stub low-pass filter to achieve sharp skirt response is proposed. The characteristics of interdigital structure were first analyzed by lumped elements equivalent circuits and investigated by full-wave microwave circuit simulator, IE3D. These simulated results were then applied as guideline for the replacement. An open stub low-pass filter was developed by this method to enhance the skirt response near 3 dB cutoff frequency and fabricated on RO-4003C substrate. The measured results show very good improvement on skirt response and the rejection level in stop band.
Keywords :
equivalent circuits; low-pass filters; lumped parameter networks; microwave filters; IE3D full-wave microwave circuit simulator; RO-4003C substrate; circuit direct replacement method; enhanced skirt response; interdigital low-pass structure; lumped elements equivalent circuits; odd-order open stub low-pass filter; Band pass filters; Capacitors; Circuit simulation; Cutoff frequency; Equivalent circuits; Impedance; Low pass filters; Microwave circuits; Microwave filters; Tuned circuits; Direct circuit replacement; interdigital structure; open stub.; skirt response;
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
DOI :
10.1109/APMC.2006.4429611
