Abstract
AbstractA compact microstrip dual‐mode bandpass filter with inserted spur‐lines at the edge of the patch is proposed. In order to obtain a low insertion loss, the proposed filter has no coupling gaps. Also, it has a size reduction of about 45% at the same resonant frequency as compared conventional dual‐mode bandpass filters. Feed lines with offset are applied to ensure a minimal mismatch. From the measured results, the dual‐mode filter has a 0.58‐dB insertion loss at 1.27 GHz with 12% bandwidth. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 43: 33–34, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20366
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