Compact microstrip lowpass filter for harmonics suppression using a new defected ground structure

Publication Type:
Journal Article
Microwave and Optical Technology Letters, 2012, 54 (6), pp. 1385 - 1387
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A compact microstrip lowpass filter (LPF) for harmonics suppression is proposed. An open stub LPF with uniquely shaped defect ground structure cells is used to optimize the LPF performance. A stopband attenuation of greater than 20 dB is obtained from 3.42 GHz to more than 18 GHz. The physical size of the proposed LPF, excluding transmission lines, is only 10 × 15 mm 2. Good agreements between simulation and measurements are observed. © 2012 Wiley Periodicals, Inc.
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