| Title |
Compact Lowpass Filter Design on Double-layered DGS Transmission Lines |
| Authors |
김용주(Young Joo Kim) ; 서동호(Dongho Seo) ; 윤원상(Won-Sang Yoon) ; 한상민(Sang-Min Han) |
| DOI |
https://doi.org/10.5370/KIEE.2020.69.12.1898 |
| Keywords |
Defected ground structure(DGS); Effective dielectric constants; Equivalent circuits; Lowpass filters; Miniaturization. |
| Abstract |
A compact double-layered DGS lowpass filter is proposed with miniaturized DGSs. The double-layered structure is composed of a conventional DGS microstrip line attaching a thick dielectric slab of a high dielectric constant, which makes a higher effective dielectric constant on a DGS pattern. The compact DGS lowpass filter is designed with miniaturized DGSs. The equivalent circuit is extracted from single DGSs on double-layered lines. The fifth-state lowpass filter with three DGSs has been implemented and compared with theoretical circuit models and electromagnetic simulated results. From the experimental results, the proposed double-layered DGS lowpass filter has shown good agreements to the design analysis and compared with a conventional DGS filter without an additional lower dielectric substrate to verify miniaturization. |