上海大学学报(英文版)
上海大學學報(英文版)
상해대학학보(영문판)
JOURNAL OF SHANGHAL UNIVERSITY
2008年
6期
495-497
,共3页
low-pass filter (LPF)%defected ground structure (DGS)%defected microstrip structure (DMS)%equivalent circuit
This paper presents a novel low-pass filter (LPF) with sharp rejection, wide stopband and compact size, which are realized by the defected ground structure (DGS) and the defected microstrip structure (DMS). The equivalent circuit model is proposed and the circuit parameters are extracted by the circuit simulation software. The parameters measured are 3 dB cutoff frequency fc of 5.2 GHz, the insertion loss less than 0.5 dB from DC to 4.0 GHz and S21 less than -20 dB within the wide stopband from 6 GHz to 16 GHz. The results of the circuit optimization agree well with those of the full wave simulation and the measured ones, which validate the effectiveness of the equivalent circuit model. The size of the proposed LPF is decreased compared with normal LPF. This LPF can be applied in rectennas to eliminate high order harmonics.
