Abstract
With the advent of planar photonic bandgap (PBG) materials, different topologies of PBG structures have been proposed to improve the bandgap performances of microwave signals. Conventional circular-patterned PBGs have constraints in the broadband stopband performance due to the high ripple heights in S-parameters. In this paper, we suggest a novel annular-ring-patterned PBG to improve the stopband bandwidth and the ripples. The aspect ratio of the annular-ring-patterned PBG plays an important role in controlling the bandwidth of the rejection band, as well as the ripple heights in the S-parameters of the PBG-engineered transmission lines.
Original language | English |
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Pages (from-to) | 431-433 |
Number of pages | 3 |
Journal | Microwave and Optical Technology Letters |
Volume | 32 |
Issue number | 6 |
DOIs | |
Publication status | Published - 20 Mar 2002 |
Externally published | Yes |
Keywords
- Annular-ring PBG
- Filters
- Microstrip lines
- Photonic bandgap
- Ripples
- Stopband