Compact Dual-Band Bandpass Filter With Controllable Bandwidths
A compact dual-band bandpass filter with controllable bandwidths and good selectivity is presented in this paper. The proposed filter employs two sets of resonators operating at diverse frequencies to generate two passbands. One set of resonators is utilized to not only generate tbe upper passband but also feed the lower passband resonator, which is a two-mode resonator, as well as realizing source-load coupling for the lower passband. The feed and resonators couplings vary as the operation band changes, thus it could provide sufficient degrees of freedom to control the center frequencies and bandwidth of the two passbands, respectively. Five transmission zeros can be created close to the passband edges, resulting in high skirt selectivity. To validate the design and analysis, a dual-band bandpass filter centered at 2.45GHz/S.27GHz for WLAN application is fabricated and measured.
Xiao-Hu Wu Qing-Xin Chu Li Fan
School of Electronic and Information Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China
国际会议
成都
英文
1305-1307
2010-05-08（万方平台首次上网日期，不代表论文的发表时间）