Bandwidth Enhancement of the Small-Size Internal Laptop Computer Antenna Using a Parasitic Open Slot for Penta-Band WWAN Operation

By embedding a parasitic open slot in the antenna ground of a small-size internal laptop computer antenna, enhanced bandwidth for the antenna's lower band to cover the GSM850/900 operation (824-960 MHz) can be achieved. The internal laptop computer antenna in this study is a small-size coupled-fed shorted T-monopole, whose length along the top edge of the display ground of the laptop computer is 43 mm only. The antenna can also provide a wide upper band to cover the GSM1800/1900/UMTS operation (1710-2170 MHz). With the inclusion of the parasitic open slot, the total antenna length along the top edge of the display ground is 48 mm only, and the occupied antenna volume is 10 × 3.5 × 48 mm3 above the top edge of the display ground, which is the smallest for the internal penta-band WWAN laptop computer antenna that have been reported for the present. Detailed results of the proposed parasitic open slot on bandwidth enhancement of the internal WWAN laptop computer antenna are presented.

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

[2]  Study of a uniplanar printed internal WWAN laptop computer antenna including user's hand effects , 2009 .

[3]  Kin-Lu Wong,et al.  Small‐size coupled‐fed shorted T‐monopole for internal WWAN antenna in the thin‐profile mobile phone , 2010 .

[4]  Cheng-Tse Lee,et al.  Uniplanar coupled-fed printed PIFA for WWAN/WLAN operation in the mobile phone , 2009 .

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

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

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

[8]  Kin-Lu Wong,et al.  Internal Coupled-Fed Shorted Monopole Antenna for GSM850/900/1800/1900/UMTS Operation in the Laptop Computer , 2008, IEEE Transactions on Antennas and Propagation.

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

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

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

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

[13]  Kin-Lu Wong,et al.  Printed $\lambda/8$ -PIFA for Penta-Band WWAN Operation in the Mobile Phone , 2009, IEEE Transactions on Antennas and Propagation.

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

[15]  Kin-Lu Wong,et al.  Internal planar WWAN laptop computer antenna using monopole slot elements , 2009 .

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

[17]  M.Y.W. Chia,et al.  Miniature built-in quad-band antennas for mobile handsets , 2003, IEEE Antennas and Wireless Propagation Letters.

[18]  Kin-Lu Wong,et al.  Bandwidth‐enhanced internal PIFA with a coupling feed for quad‐band operation in the mobile phone , 2008 .

[19]  Kin-Lu Wong,et al.  Multiband Printed Monopole Slot Antenna for WWAN Operation in the Laptop Computer , 2009, IEEE Transactions on Antennas and Propagation.

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

[21]  Kin-Lu Wong,et al.  Uniplanar coupled‐fed printed PIFA for WWAN operation in the laptop computer , 2009 .

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

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

[24]  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.