A compact dual-band bandpass filter using meandering stepped impedance resonators

作者：Chu Qing Xin^*; Chen Fu Chang

来源：IEEE Microwave and Wireless Components Letters, 2008, 18(5): 320-322.

DOI：10.1109/LMWC.2008.922117

• bandpass filter (BPF)
• dual-band
• microstrip
• stepped-impedance resonator (SIR)

This letter presents a miniaturized dual-band narrow bandpass filter (BPF) using meandering stepped impedance resonators (SIRs) with a new coupling scheme, which exhibited a size reduction of 50% compared with the traditional direct coupling structure at the same frequency, while the new structure can generate three transmission zeros in the insertion loss response. To validate the design and analysis, two dual-band BPFs centered at 2.4-GHz/5.2-GHz and 2.4-GHz/5.7-GHz for WLAN application were fabricated and measured. It is shown that the measured and simulated performances are in good agreement. The BPFs achieved insertion loss of less than 2 dB and return loss of greater than 16-dB in each band.

• 出版日期2008-5
• 单位华南理工大学