Abstract
AbstractA compact bandpass filter (BPF) embedded with 5.8 GHz wireless‐LAN notch is presented for 3.1–10.6 GHz ultra‐wideband (UWB) systems. The proposed UWB‐BPF based on a defect‐grounded structure is implemented with an FR4 board. Two open‐loop resonators on the top layer provide a narrow notch band whose center frequency can be easily adjusted by varying the sizes of the open‐loop. A simple C‐shaped slot on the bottom ground layer is adopted to improve the bandwidth performance. The characteristics of UWB‐BPF are analyzed and simulated using a circuit model of LC lump elements. The size of the filter is at least 34% less than those filters with the same specification. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1215–1218, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25153
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