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Small‐size printed loop‐type antenna integrated with two stacked coupled‐fed shorted strip monopoles for eight‐band LTE/GSM/UMTS operation in the mobile phone
Author(s) -
Wong KinLu,
Chen WeiYu
Publication year - 2010
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.25257
Subject(s) - monopole antenna , umts frequency bands , gsm , antenna (radio) , electrical engineering , ground plane , strips , engineering , loop antenna , physics , dipole antenna , acoustics , electronic engineering , coaxial antenna , telecommunications , computer science , artificial intelligence
A small‐size internal printed antenna formed by a loop‐type antenna integrated with two stacked coupled‐fed shorted strip monopoles is presented.The proposed antenna has a small uniplanar structure of 40 × 15 mm 2 (600 mm 2 ) for eight‐band LTE/GSM/UMTS operation in the mobile phone. The loop‐type antenna comprises a driven monopole and a coupled portion short‐circuited to the system ground plane of the mobile phone; the driven monopole alone contributes a resonant mode for the antenna's upper band, whereas the driven monopole and shorted coupled portion together provide a loop‐type resonant path to generate a resonant mode for the antenna's lower band. Two stacked strips are then integrated with the loop‐type antenna, with the two strips coupled‐fed by the driven monopole and short‐circuited to the ground plane through the shorted coupled portion. That is, two stacked coupled‐fed shorted strip monopoles are formed and incorporated with the loop‐type antenna in an integrated configuration. The two strip monopoles contribute two additional resonant modes to incorporate those generated by the loop‐type antenna to achieve the desired wide lower band (698–960 MHz) and upper band (1710–2690 MHz) for eight‐band LTE/GSM/UMTS operation. Details of the proposed antenna are presented. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1471–1476, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25257