Title :
A semicircle DGS with high Q factor for microstrip line and low-pass filter
Author :
Lin, Shui-Yang ; Tian, Wei-Zhong ; Zheng, Shu-Qi ; Sun, Xiao-Wei
Author_Institution :
ShangHai Inst. of Microsyst. & Inf. Technol., Shanghai
Abstract :
A novel semicircle defected ground structure (SDGS) for microstrip line is proposed. It can provide deeper bandgap property than traditional one can do. Considering their equivalent circuit models, I find the quality factor Q of the proposed DGS microstrip line is 45, which is much higher than the traditional one´s 8.5. Finally, a compact SDGS low-pass filter is simulated and measured. Due to the SDGS microstrip line´s high Q factor, the filter´s insertion loss in the passband is smaller than 0.2 dB. The validity of the SDGS filter is verified by the agreement between simulated and measured results.
Keywords :
Q-factor; low-pass filters; microstrip filters; microstrip lines; SDGS filter; defected ground structure; high Q factor; low-pass filter; microstrip line; quality factor Q; semicircle DGS; Band pass filters; Circuit simulation; Low pass filters; Microstrip filters; Passband; Photonic band gap; Q factor; RLC circuits; Resonance; Scattering parameters; bandgap; defecteded ground structure; low-pass filter; microstrip line;
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.2006.4429621
