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Theoretical investigations into binomial distributions of photonic bandgaps in microstripline structures
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.10273
Subject(s) - microstrip , microwave , ripple , bandwidth (computing) , photonics , stopband , binomial (polynomial) , distribution (mathematics) , optics , mathematics , physics , engineering , telecommunications , mathematical analysis , electrical engineering , band pass filter , statistics , voltage
Conventional circular patterned microstrip PBGs have constraints in broad stop‐band response due to high ripple heights in S parameters. In this Letter, a novel configuration with the nonuniform dimensions of circular‐patterned PBGs to improve the rejection bandwidth and the ripples is proposed. The dimensions of the circles are varied proportionally to the amplitude coefficients of the binomial distribution. The S‐parameter versus frequency plot of a 10‐element binomially distributed circular‐patterned PBG array has been presented. The result reveals that the binomial distribution improves the performance by suppressing ripples and generating distinct stop‐band and low‐pass responses and sharp cutoffs. A tandem of two such PBG lines yields even wider and distinct stop‐band and low‐pass responses. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 33: 191–196, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10273