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Radiation efficiency enhancement using lumped inductors for dual‐mode mobile phone
Author(s) -
Lee SeungJun,
Park SungWon,
Park ChulWoo,
Kim YoungSik
Publication year - 2012
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.26735
Subject(s) - microwave , inductor , gsm , antenna (radio) , multi band device , antenna efficiency , radiation , electrical engineering , engineering , mobile phone , planar , radiation pattern , electronic engineering , optics , physics , optoelectronics , telecommunications , computer science , voltage , computer graphics (images)
Abstract This letter proposes a radiation efficiency enhancement technique using a lumped inductor for a dual‐mode mobile phone.Two planar inverted‐F antennas (PIFAs) with a collinear arrangement are used for dual‐mode operation at the CDMA band of 824–894 MHz and GSM band of 880–960 MHz. Each antenna is separately connected to a lumped inductor of 4.7 nH. The electric field is more confined on each inverted‐F section at its operating band in this configuration and the coupling between PIFAs is less than −10 dB. The simulated and measured results show that radiation efficiency of the proposed antenna is improved by up to 33%. The radiation patterns are similar to those of a dipole antenna with slightly tilted main beam directions due to the PIFA placement. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1011–1013, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26735