A New Compact Dual-Band Filter Using SIR

Abstract:

A narrowband dual-band bandpass filter based on step impedance resonator (SIR) is proposed in this paper to realize high performance with a compact size. The center frequencies of the designed filter are 2.4 and 5.8GHz, where it is suitable for wireless communication system. The absolute bandwidth approaches 200MHz with 8.3% fractional bandwidth at -3dB, and the simulations show that the return loss of the first and the second band is lower than -20dB. Between the two passbands, there is a transmission zero which can achieve a high out-band isolation. For demonstration, the filter has been fabricated and the measurement results show the excellent agreement with the theoretical simulation results

• Periodical: Advanced Materials Research (Volumes 424-425)
• Pages: 573-576
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.424-425.573
• Online since: January 2012
• Authors: Jin Ping Hu, Guo Hui Li, Wei Dong Fang, Wei Zhang, Hai Ping Hu
• Keywords: Bandpass Filter (BPF), Dual-Band, SIR

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