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GSM850/900/1800/1900/UMTS coupled‐fed planar λ/8‐PIFA for internal mobile phone antenna
Author(s) -
Chang ChihHua,
Wong KinLu
Publication year - 2009
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.24214
Subject(s) - umts frequency bands , planar , antenna (radio) , mobile phone , folded inverted conformal antenna , electrical engineering , microwave , coupling (piping) , engineering , optoelectronics , electronic engineering , materials science , coaxial antenna , microstrip antenna , telecommunications , computer science , mechanical engineering , computer graphics (images)
A coupled‐fed planar PIFA (planar inverted‐F antenna) operated in its one‐eighth wavelength (λ/8) mode, different from the traditional one‐quarter wavelength (λ/4) mode, as the fundamental mode for mobile phone application is presented. The proposed PIFA comprises two radiating strips, both of slightly different lengths and close to about λ/8 at 900 MHz. By incorporating the use of the coupling feed, a wide operating band formed by the two λ/8 modes is excited at about 900 MHz for the antenna to cover GSM850/900 operation. Two λ/4 modes are also generated at close frequencies to from a wide operating band centered at about 1950 MHz to cover GSM1800/1900/UMTS operation. The proposed antenna hence can cover GSM850/900/1800/1900/UMTS penta‐band operation for application in the mobile phone. In addition, the antenna has a simple structure and can be printed on a thin FR4 substrate of size 1.6 × 7 × 40 mm 3 as a surface‐mountable chip antenna. Details of the proposed antenna are presented and discussed. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1091–1096, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24214