Abstract
AbstractIn this article, a novel compact dual‐band bandpass filter (BPF) using asymmetric stepped impedance resonators (SIRs) has been presented for the first time. The feature of the proposed asymmetric SIR is only one step discontinuity, which is different from the conventional SIR with two step discontinuities. The frequency response of the dual‐band at 2.4/5.2 GHz can be achieved by determining the impedance ratio (K) and physical length ratio (α) of the asymmetric SIR. The coupling coefficient between the coupled asymmetric SIRs is calculated by using full‐wave simulator IE3D. A dual band BPF is designed, fabricated, and measured. The measured results are in good agreement with the full‐wave simulation results. Additionally, the BPF has a smaller circuit size in comparison of previous works. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1237–1240, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23339
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