A Compact Microstrip Dual-Mode Dual-Band Filter with Source-Load Coupling
A novel microstrip dual-band filter is proposed in this paper. The filter consists of a microstrip stubloaded dual-mode resonator and a half-wavelength resonator that are folded into a very compact U-shape configuration. By choosing the step-impedances of the stub-loaded dual-mode resonator, we can change the center frequencies of the dual-bands and the bandwidth of the first passband separately. By adding the half-wavelength resonator, we can control the bandwidth of the second passband freely. The halfwavelength resonator also introduces cross-coupling between the input and output feed lines. As a consequence, two additional transmission zeros are produced, which improve significantly the isolation between the dual passbands. The designed filter operating at 2.45GHz and 5.2 GHz for WLAN applications shows favorable performance.
Zaifeng Yang Luhong Zhang Zhewang Ma Xuexia Yang
School of Communication and Information Engineering, Shanghai University,Shanghai, China, 200072 Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
国际会议
2011 China-Japan Joint Microwave Conference(2011年中日微波会议CJMW 2011)
杭州
英文
382-385
2011-04-20（万方平台首次上网日期，不代表论文的发表时间）