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Bandwidth‐enhanced internal PIFA with a coupling feed for quad‐band operation in the mobile phone
Author(s) -
Wong KinLu,
Huang ChihHong
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.23175
Subject(s) - folded inverted conformal antenna , bandwidth (computing) , standing wave ratio , multi band device , planar , electrical engineering , microwave , mobile phone , optoelectronics , materials science , engineering , electronic engineering , antenna (radio) , antenna efficiency , telecommunications , microstrip antenna , computer science , computer graphics (images)
A novel bandwidth‐enhanced internal planar inverted‐F antenna (PIFA) for quad‐band operation in the mobile phone is presented. The proposed PIFA is capacitively excited using a coupling feed, which leads to a dual‐resonance excitation in the antenna's lower band at about 900 MHz and a wide‐band resonant mode excitation at about 1800 MHz. This makes the operating bandwidths of both the antenna's lower and upper bands larger than 20% (3:1 VSWR), thus easily covering GSM850/900 and DCS/PCS operation. In addition, with quad‐band operation obtained, the proposed PIFA occupies a small volume of 5 × 6 × 60 mm 3 or 1.8 cm 3 only. Details of the proposed PIFA are described, and results of fabricated prototypes are presented and discussed. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 683–687, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23175