Title :
Compact dual-band bandpass filter with improved stopband characteristics
Author :
Wei, X.B. ; Shi, Y. ; Wang, Peng ; Liao, J.X. ; Xu, Z.Q. ; Yang, B.C.
Author_Institution :
Res. Inst. of Electron. Sci. & Technol., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A compact dual-band bandpass filter with an improved stopband using short-circuit centred stepped impedance resonators (SCSIRs) is presented. The proposed filter consists of two SCSIRs, one of which is embedded in the other one to obtain two passbands. Multiple transmission zeros can be generated by the proposed SCSIR for high passband selectivity and upper wide stopband bandwidth. The centre frequencies and bandwidths of the two passbands can be controlled by adjusting the geometric dimensions of the SCSIRs, respectively. A 2.4/5.2 GHz dual-band experimental BPF has been designed and fabricated to demonstrate the proposed method.
Keywords :
UHF filters; band-pass filters; band-stop filters; microwave filters; resonator filters; compact dual-band bandpass filter; passband selectivity; short-circuit centred stepped impedance resonator; stopband characteristics;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2012.1107
