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Optimal size of uniform aperture for near‐field penetration through lossy medium
Author(s) -
Razavi Aidin,
Yang Jian
Publication year - 2014
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.28578
Subject(s) - lossy compression , penetration (warfare) , near and far field , microwave , antenna aperture , aperture (computer memory) , radius , optics , penetration depth , antenna (radio) , materials science , physics , radiation pattern , acoustics , electrical engineering , engineering , computer science , telecommunications , computer security , operations research , artificial intelligence
ABSTRACT We present our investigations on the optimal size of uniform antenna aperture for the maximum near‐field penetration of microwave signals through lossy materials. Penetration ability of an antenna through a certain depth in a lossy material depends on how much the radiated power from the antenna is focused at that depth. A figure of merit, the near‐field 3 dB beam radius, is used to define this focusing. Empirical formula to calculate the minimum 3 dB radius and its location are provided in the article. Verification of the results has been carried out by simulations using a commercial electromagnetic solver. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2301–2304, 2014