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SAR study of antennas in wireless communication terminals
Author(s) -
Shi Yan,
Sun Hao,
Liang ChangHong
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.28588
Subject(s) - monopole antenna , antenna measurement , antenna efficiency , antenna (radio) , dipole antenna , directional antenna , electrical engineering , electronic engineering , engineering , physics , acoustics
ABSTRACT A new normalized evaluation method has been proposed to compare specific absorption rates (SARs) of four representative terminal antennas at wireless communication LTE band 7 including loop antenna, monopole antenna, planar inverted‐f antenna (PIFA), and zeroth‐order resonant (ZOR) antenna based on the composite left‐ and right‐hands transmission line. According to analyses of the effects of human tissue on antenna performance, input power is normalized by return loss and radiation efficiency of terminal antennas. Simulation and measurement results show that the normalized SARs of four antennas for 4G USB dongle application are reasonably ranked in order from small to large as PIFA, ZOR antenna, loop antenna, monopole antenna, which means that PIFA has most homogeneous near‐zone power distribution, whereas monopole antenna has the worst one among four antennas. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2361–2365, 2014