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Near‐field diffraction pattern by an underground void of circular cylinder
Author(s) -
Lee TaekKyung,
Park SeongOok,
Ra JungWoong,
Kim SeYun
Publication year - 1989
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.4650020511
Subject(s) - void (composites) , diffraction , near and far field , amplitude , cylinder , optics , acoustics , physics , field (mathematics) , electromagnetic field , geology , engineering , materials science , mathematics , mechanical engineering , quantum mechanics , pure mathematics , composite material
Amplitude patterns of the electromagnetic field scattered by a circular air cylinder embedded in a dielectric medium are analyzed. Twenty five decibel double dip patterns measured by the scale‐down experiment are presented. Theoretical analysis shows that these double dips become double nulls in the near‐field region. This phenomenon is useful in locating high‐contrast geological anomalies.