Title :
Compact and high selectivity dual-band dual-mode microstrip BPF with single stepped-impedance resonator
Author :
Deng, Hong-wei ; Zhao, Y.-J. ; Zhang, Xiao-Song ; Chen, Weijie ; Wang, J.-K.
Author_Institution :
Coll. of Inf. Sci. & Technol., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
A novel dual-band dual-mode microstrip bandpass filter (BPF) with compact size and high selectivity performance is proposed using a single short-stub-loaded stepped-impedance resonator (SIR). Owing to the source-load coupling and the intrinsic characteristics of the SIR, five transmission zeros can be generated near the passband edges and in the upper-stopband to improve the selectivity. A dual-band filter located at 1.57-GHz (GPS application) and 5.35-GHz (WLAN application) has been designed, fabricated and measured. Good agreement between simulation and measurement verifies the validity of this design methodology.
Keywords :
band-pass filters; microstrip filters; resonator filters; GPS application; WLAN application; compact size; dual-band dual-mode microstrip bandpass filter; frequency 1.57 GHz; frequency 5.35 GHz; high selectivity performance; passband edges; single short-stub-loaded stepped-impedance resonator; source-load coupling; transmission zeros;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2011.0054
