2009•Microwave and Optical Technology LettersRequires access

An improved asymmetric defected ground structure cell and its application to lowpass filter

FU Shu-hong, Chuangming Tong, Kai Shen

Abstract

Abstract An improved asymmetric defected ground structure cell is presented and analyzed. Based on this structure, a microstrip lowpass filter with low passband loss and high stopband suppression is designed and fabricated. Measured passband losses are below 1 dB, and a sharp slop is obtained at passband frequency fringe. The suppression is no <30 dB in stopband from 2.98 to 10 GHz. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2933–2935, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24778

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Key concepts: Passband, Stopband, Microwave, Low-pass filter, Elliptic filter, Microstrip, Filter (signal processing), Transition band