Title :
A Novel Compact Stepped-Impedance Resonator Lowpass Filter
Author :
Wang, Hua-Hong ; Gao, Yan-Yan ; Yang, Xue-Xia ; Sun, Xiao-Meng
Author_Institution :
Sch. of Commun. & Inf. Eng., Shanghai Univ., Shanghai
Abstract :
A novel stepped-impedance resonator (SIR) and its simplified equivalent circuit are proposed in this paper. The frequency responses of the SIR with different sizes are analyzed by the full-wave electromagnetic (EM) simulator. A novel low-pass filter (LPF) with two transmission zeros is designed and fabricated based on the SIR. The measured 3 dB cutoff frequency fc is 7.2 GHz with 0.3 dB ripple level in the pass-band. The rejection bandwidth of the insertion loss more than 15 dB is 9 GHz. The experimental results show good agreement with simulated ones, which validates the effectiveness of the SIR equivalent circuit and the feasibility of the novel SIR LPF.
Keywords :
band-pass filters; electromagnetic devices; equivalent circuits; frequency response; low-pass filters; microwave filters; poles and zeros; resonator filters; EM simulator; SIR LPF filter; SIR equivalent circuit; frequency 7.2 GHz; frequency 9 GHz; frequency response; full-wave electromagnetic simulator; insertion loss; pass-band filter; rejection bandwidth; simplified equivalent circuit; stepped-impedance resonator lowpass filter; transmission zero; Analytical models; Band pass filters; Circuit simulation; Electromagnetic analysis; Electromagnetic measurements; Equivalent circuits; Filtering theory; Frequency measurement; Low pass filters; Resonator filters; Stepped-impedance resonator (SIR); equivalent circuit; low-pass filter(LPF); odd-mode/even-mode resonator frequencies;
Conference_Titel :
Microwave Conference, 2008 China-Japan Joint
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-3821-1
DOI :
10.1109/CJMW.2008.4772378
