Small-size printed loop antenna for penta-band thin-profile mobile phone application

A planar printed loop antenna with a small area of 15 × 50 mm2 and capable of covering all five operating bands of GSM850/900/1800/1900/UMTS for WWAN (wireless wide area network) operation in the thin-profile mobile phone is presented. The antenna is very suitable to be directly printed on the system circuit board of the mobile phone, making it easy to fabricate at low cost and generally showing no thickness above the circuit board; the latter is very attractive for thin-profile mobile phone applications. In addition, the proposed loop antenna is very suitable to be printed at the bottom position of the mobile phone; in this case the antenna meets the SAR (specific absorption rate) limit for practical applications. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1512–1517, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24359

[1]  H. Morishita,et al.  Characteristics of a balance-fed loop antenna system for handsets in the vicinity of human head or hand , 2000, IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C.

[2]  Constantine A. Balanis,et al.  Folded loop antenna for mobile hand-held units , 1998 .

[3]  James C. Lin.  Specific absorption rates induced in head tissues by microwave radiation from cell phones , 2001 .

[4]  Kin-Lu Wong,et al.  Half‐wavelength loop strip capacitively fed by a printed monopole for penta‐band mobile phone antenna , 2008 .

[5]  Kin-Lu Wong,et al.  Internal printed loop‐type mobile phone antenna for penta‐band operation , 2007 .

[6]  Kin-Lu Wong,et al.  Printed monopole slot antenna for penta‐band operation in the folder‐type mobile phone , 2008 .

[7]  C. C. Chiau,et al.  A Miniature Dielectric-Loaded Folded Half-Loop Antenna and Ground Plane Effects , 2005, IEEE Antennas and Wireless Propagation Letters.

[8]  Kin‐Lu Wong,et al.  Printed Monopole Slot Antenna for Internal Multiband Mobile Phone Antenna , 2007, IEEE Transactions on Antennas and Propagation.

[9]  P. Vainikainen,et al.  Resonator-based analysis of the combination of mobile handset antenna and chassis , 2002 .

[10]  Kin-Lu Wong,et al.  Planar Antennas for Wireless Communications , 2003 .

[11]  Kin-Lu Wong,et al.  Printed PIFA with a coplanar coupling feed for penta-band operation in the mobile phone , 2008 .

[12]  Kin‐Lu Wong,et al.  Internal Compact Dual-Band Printed Loop Antenna for Mobile Phone Application , 2007, IEEE Transactions on Antennas and Propagation.

[13]  Wei-Yu Li,et al.  Surface-mount loop antenna for AMPS/GSM/DCS/PCS operation in the PDA phone , 2007 .

[14]  Kin-Lu Wong,et al.  GSM850/900/1800/1900/UMTS printed monopole antenna for mobile phone application , 2008 .

[15]  Byungje Lee,et al.  A folded and bent internal loop antenna for GSM/DCS/PCS operation of mobile handset applications , 2006 .

[16]  Kyohei Fujimoto,et al.  Built-in folded monopole antenna for handsets , 2004 .

[17]  Kin‐Lu Wong,et al.  Printed Loop Antenna With a Perpendicular Feed for Penta-Band Mobile Phone Application , 2008, IEEE Transactions on Antennas and Propagation.

[18]  P. Vainikainen,et al.  Bandwidth, SAR, and efficiency of internal mobile phone antennas , 2004, IEEE Transactions on Electromagnetic Compatibility.

[19]  Y. Rahmat-Samii,et al.  Optimization of PIFA-IFA combination in handset antenna designs , 2005, IEEE Transactions on Antennas and Propagation.

[20]  Kin-Lu Wong,et al.  GSM 850 / 900 / 1800 / 1900 / UMTS Printed Monopole Antenna for Mobile Phone Application , 2008 .

[21]  Kin-Lu Wong,et al.  Internal meandered loop antenna for GSM/DCS/PCS multiband operation in a mobile phone with the user's hand , 2007 .

[22]  Kin-Lu Wong,et al.  Compact Multiband Folded Loop Chip Antenna for Small-Size Mobile Phone , 2008 .

[23]  Byungje Lee,et al.  Internal folded loop antenna with tuning notches for GSM/GPS/DCS/PCS mobile handset applications , 2006 .

[24]  T. Tanaka,et al.  Built-in half size of folded dipole antenna for handsets , 2004, IEEE Antennas and Propagation Society Symposium, 2004..

[25]  Kin-Lu Wong,et al.  Hexa-band internal printed slot antenna for mobile phone application , 2008 .