Title :
Compact DGS resonator with improvement of Q-factor
Author :
Wang, C.-J. ; Lin, C.-S.
Author_Institution :
Dept. of Electron. Eng., Nat. Univ. of Tainan, Tainan
Abstract :
A new design of a compact two-layer bandstop filter using a defected ground structure (DGS) resonator with a parasitic stub is proposed. The proposed filter is composed of a H-slot DGS resonator located on the two stacked layer and a stub placed on the bottom layer. The parasitic stub modelled as an additional capacitance increases the effective capacitance of the resonator and lowers the resonance frequency. In addition, the rejection bandwidth is decreased and the quality (Q)-factor is also improved owing to enhancement of the stored energy in the resonator.
Keywords :
Q-factor; band-stop filters; capacitance; microwave circuits; microwave filters; resonator filters; stack filters; H-slot DGS resonator; Q-factor; RF circuits; compact DGS resonator; compact two-layer bandstop filter design; defected ground structure resonator; microwave circuits; parasitic stub modelling; rejection bandwidth; resonance frequency; resonator capacitance; stored energy enhancement;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20081417
