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Improved performance of photonic band‐gap microstripline structures with the use of Chebyshev distributions
Author(s) -
Karmakar Nemai C.
Publication year - 2002
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.10212
Subject(s) - stopband , chebyshev filter , passband , ripple , broadband , microwave , optics , microstrip , photonic crystal , materials science , physics , optoelectronics , band pass filter , telecommunications , engineering , electrical engineering , voltage
Conventional uniform circular‐patterned photonic band gaps (PBGs) have constraints in the broadband passband and stopband performance because of the high ripple heights in S parameters. This Letter suggests a novel configuration with nonuniform dimensions of circular‐patterned PBG to improve both pass‐ and stopband bandwidths and the ripples. The dimensions of the circles are varied proportionally to the relative Chebyshev amplitudes of a 10‐element PBG array, and the dispersion characteristics are analyzed. It is seen that the Chebyshev distribution of the circular‐patterned PBG line produces excellent performance by suppressing ripples and yielding better selectivity at cutoffs. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 33: 1–5, 2002; DOI 10.1002/mop.10212