Multiband Printed Monopole Slot Antenna for WWAN Operation in the Laptop Computer

A multiband printed monopole slot antenna promising for operating as an internal antenna in the thin-profile laptop computer for wireless wide area network (WWAN) operation is presented. The proposed antenna is formed by three monopole slots operated at their quarter-wavelength modes and arranged in a compact planar configuration. A step-shaped microstrip feedline is applied to excite the three monopole slots at their respective optimal feeding position, and two wide operating bands at about 900 and 1900 MHz are obtained for the antenna to cover all the five operating bands of GSM850/900/1800/1900/UMTS for WWAN operation. The antenna is easily printed on a small-size FR4 substrate and shows a length of 60 mm only and a height of 12 mm when mounted at the top edge of the system ground plane or supporting metal frame of the laptop display. Details of the proposed antenna are presented and studied.

[1]  Kin-Lu Wong,et al.  Internal GSM/DCS dual-band open-loop antenna for laptop application , 2007 .

[2]  B. Gaucher,et al.  Performance analysis of inverted-F and slot antennas for WLAN applications , 2003, IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450).

[3]  J. Rahola,et al.  Quarter-wavelength wideband slot antenna for 3-5 GHz mobile applications , 2005, IEEE Antennas and Wireless Propagation Letters.

[4]  S. Latif,et al.  Bandwidth enhancement and size reduction of microstrip slot antennas , 2005, IEEE Transactions on Antennas and Propagation.

[5]  Raj Mittra,et al.  A novel dual-band WLAN antenna for notebook platforms , 2004, IEEE Antennas and Propagation Society Symposium, 2004..

[6]  Kin-Lu Wong,et al.  Internal cellular/WLAN combo antenna for laptop-computer applications , 2005 .

[7]  Kin-Lu Wong,et al.  Internal hybrid antenna for multiband operation in the mobile phone , 2008 .

[8]  Wen‐Shan Chen,et al.  Band-Rejected Design of the Printed Open Slot Antenna for WLAN/WiMAX Operation , 2008, IEEE Transactions on Antennas and Propagation.

[9]  Kin-Lu Wong,et al.  Shorted T-shaped monopole antenna for 2.4/5 GHz WLAN operation , 2004 .

[10]  L. Shafai,et al.  Investigation of wide-band microstrip slot antenna , 2004, IEEE Transactions on Antennas and Propagation.

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

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

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

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

[15]  A. Rydberg,et al.  Wideband Slot Antenna for Low-Profile Hand-held Terminal Applications , 2006, 2006 European Microwave Conference.

[16]  Kin-Lu Wong,et al.  Internal hybrid loop/monopole slot antenna for quad‐band operation in the mobile phone , 2008 .

[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]  Kin-Lu Wong,et al.  Uni-Planar Dual-Band Monopole Antenna for 2.4/5 GHz WLAN Operation in the Laptop Computer , 2007, IEEE Transactions on Antennas and Propagation.

[19]  Wenhua Chen,et al.  Multiband antenna with parasitic branches for laptop applications , 2007 .

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

[21]  Kin-Lu Wong,et al.  Dual-band flat-plate antenna with a shorted parasitic element for laptop applications , 2005, IEEE Transactions on Antennas and Propagation.