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Small‐size triple‐wideband LTE tablet device antenna with a wideband feed structure formed by integrated matching network
Author(s) -
Wong KinLu,
Weng TsengWei
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.28624
Subject(s) - wideband , inductor , capacitor , electrical engineering , antenna (radio) , chip , engineering , electronic engineering , optoelectronics , materials science , voltage
A small‐size tablet device antenna with three wide operating bands of 698–960 MHz (low band), 1710–2690 MHz (middle band), and 3400–3800 MHz (high band) for the long term evolution operation is presented. The antenna occupies a small ground clearance of 10 × 30 mm 2 and has a thin thickness of 3 mm in the tablet device such as a tablet computer in this study. The antenna comprises three radiating branches (Branch 1, Branch 2, and Branch 3) and a wideband feed structure formed by the integrated matching network. Branch 1 and 2 are connected through a series chip inductor to control the antenna's first two resonant modes to occur in the desired low band and middle band, and Branch 3 generates a resonant mode in the desired high band. The integrated matching network comprises a shunt chip capacitor, a shunt chip inductor, and a series chip capacitor to cause dual‐resonance of the antenna's three resonant modes contributed by the three branches, thereby greatly enhancing the low‐band, middle‐band, and high‐band bandwidths to cover the desired operating bands of 698–960, 1710–2690, and 3400–3800 MHz. Details of the proposed antenna are described. Operating principle of the wideband feed structure formed by the integrated matching circuit is also discussed. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2507–2512, 2014