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Compact lowpass filter with wide stop-band using coupled-line hairpin unit

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5 Author(s)
Wei, F. ; Nat. Key Lab. of Sci. & Technol. on Antennas & Microwaves, Xidian Univ., Xi'an, China ; Chen, L. ; Shi, X.-W. ; Huang, Q.-L.
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A novel transmission line configuration is proposed to design a lowpass filter (LPF) with sharp cutoff frequency response and wide rejection bandwidth. The proposed LPF is realised by a cascading microstrip coupled-line hairpin unit, semi-circle defected ground structures and semi-circle stepped-impedance shunt stubs. Theoretical and simulated results are presented, which are in good agreement with measured results.

Published in:

Electronics Letters  (Volume:46 ,  Issue: 1 )