Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 41, Issue 20, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/41/20/205002
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Funding
- German Academic Exchange Service (DAAD)
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In this paper, a left-handed metamaterial coplanar-waveguide bandpass filter with a compact electrical size is proposed. The filter features a strongly improved out-of-band rejection ratio compared with conventional cascaded split ring resonator (SRR) structures while all dimensions remain well below a third of the guided design wavelength. Especially, the problem of low upper stopband attenuation is overcome. This is achieved by combining an SRR with a complementary SRR cell. We also demonstrate that this approach enables flexible filter designs for a broad range of bandwidth ratios with small insertion losses at the centre frequency of the device.
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