Title :
A Quasi-Elliptic Function Dual-Band Bandpass Filter Stacking Spiral-Shaped CPW Defected Ground Structure and Back-Side Coupled Strip Lines
Author :
Shi, Jin ; Chen, Jian-Xin ; Xue, Quan
Author_Institution :
Wireless Terminal R&D Div., Huawei Technol. Co. Ltd., Shenzhen
fDate :
6/1/2007 12:00:00 AM
Abstract :
A quasi-elliptic function dual-band bandpass filter (BPF) stacking spiral-shaped coplanar waveguide defected ground structure and back-side coupled strip lines is proposed, which allow two transmission paths to radio frequency signals. Each of them has quasi-elliptic characteristics and results in a respective passband. This can provide convenience to change one passband operating frequency independently of the other one. Several attenuation poles in the stopband are realized to improve the selectivity of the proposed BPF. Theoretical and experimental results with good agreement are presented
Keywords :
UHF filters; band-pass filters; coplanar waveguides; microwave filters; poles and zeros; strip lines; attenuation poles; back-side coupled strip lines; defected ground structure; dual-band bandpass filter; improved selectivity; quasi-elliptic function filter; Attenuation; Band pass filters; Coplanar waveguides; Couplings; Dual band; Passband; RF signals; Radio frequency; Stacking; Strips; Bandpass filter (BPF); dual-band; quasi-elliptic; spiral-shaped coplanar waveguide (CPW) defected ground structure (DGS);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2007.897791
