Title :
Stopband-Extended Balanced Bandpass Filter Using Coupled Stepped-Impedance Resonators
Author :
Wu, Chung-Hwa ; Wang, Chi-Hsueh ; Chen, Chun Hsiung
Author_Institution :
Nat. Taiwan Univ., Taipei
fDate :
7/1/2007 12:00:00 AM
Abstract :
A novel fourth-order balanced bandpass filter is proposed based on the half-wavelength (lambda/2) stepped-impedance resonators (SIRs). By properly adjusting the parameters of each SIR, the proposed filter may be made compact and its stopband may also be extended simultaneously. Specifically, a balanced filter with acceptable common-mode rejection is implemented with its differential-mode and common-mode stopbands extended up to 5.5 fo d, where fo d is the center frequency of differential-mode passband.
Keywords :
band-pass filters; band-stop filters; resonator filters; common-mode rejection; common-mode stopbands; coupled stepped-impedance resonators; differential-mode passband; differential-mode stopbands; fourth-order balanced bandpass filter; stopband-extended balanced bandpass filter; Band pass filters; Coupling circuits; Feeds; Frequency response; Impedance; Magnetic separation; Passband; Resonator filters; System-on-a-chip; Working environment noise; Balanced filter (BPF); coupled-resonator BPF; stepped-impedance resonator (SIR); stopband extension;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2007.899311
