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Capacitively FED hybrid monopole/slot chip antenna for 2.5/3.5/5.5 GHz WiMAX operation in the mobile phone
Author(s) -
Lai PengYu,
Wong KinLu
Publication year - 2008
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.23777
Subject(s) - wimax , monopole antenna , slot antenna , electrical engineering , antenna (radio) , mobile phone , impedance matching , electrical length , chip , miniaturization , engineering , physics , electronic engineering , optoelectronics , computer science , telecommunications , dipole antenna , electrical impedance , wireless
In this study, a promising design of the capacitively fed hybrid monopole/slot chip antenna for the 2.5/3.5/5.5 GHz WiMAX (worldwide interoperability for microwave access) operation in the mobile phone is presented. The antenna is printed on a thin FR4 substrate of small size 5.2 × 16 mm 2 as a surface‐mount element to be placed at one corner of the system circuit board of the mobile phone. The antenna mainly comprises a resonant monopole patch, a resonant shorter slot, and a matching longer slot; the latter two slots are embedded within the monopole patch to achieve a compact integration. Two wide operating bands centered at about 3.3 and 5.5 GHz are generated through capacitive excitation of the resonant monopole patch and the shorter slot, while the matching longer slot helps to improve the impedance matching over the two operating bands. The lower band covers WiMAX operation in the 2.5 GHz (2500–2690 MHz) and 3.5 GHz (3300–3700 MHz) bands, while the upper band covers the 5.5 GHz (5250–5850 MHz) WiMAX operation. Details of the proposed hybrid monopole/slot chip antenna are presented. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2689–2694, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23777