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A new frequency‐reconfigurable antenna using coupling patterns for mobile handsets
Author(s) -
Lee WonWoo,
Cho YongSang
Publication year - 2015
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.29325
Subject(s) - reconfigurable antenna , antenna (radio) , electrical engineering , engineering , electronic engineering , aperture (computer memory) , frequency band , microwave , radiation pattern , antenna efficiency , physics , acoustics , telecommunications
ABSTRACT This letter focuses on the design of a new frequency‐reconfigurable antenna for a mobile handset application. The proposed antenna supports the most important long‐term evolution bands: band 17 (704–746 MHz), band 13 (746–787 MHz), band 5 (824–894 MHz), and band 8 (880–960 MHz). A digital variable capacitor (DVC) is used via a coupling pattern proximity to the aperture of an inverted F antenna (IFA) to which a single‐pole single throw RF switch is connected to take advantages of the two different kinds of tuning elements. We show that the proposed antenna is able to have a quasicontinuous and wide range of frequency tuning capabilities over 700–960 MHz through simulations and experiments. We also show that the coupled aperture used for connection of the DVC to the aperture of IFA is helpful for reducing the ohmic losses in the DVC from the antenna efficiency degradation which is the most important figure of merit for frequency reconfigurable antennas based on the active tuning elements. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2333–2336, 2015