Skip to main content Accessibility help

Small embedded LTE/WWAN antenna integrated with keyboard ground plane in a laptop computer

  • Shu-Chuan Chen (a1), Yun-Tsan Lee (a1) and Po-Wei Wu (a2)


A novel small embedded long-term evolution/wireless wide area network (LTE/WWAN) antenna integrated with the keyboard ground plane in a laptop computer is presented. The antenna is installed on a notched region (40 × 8 mm2) of the keyboard ground plane at a distance of 10 mm from the laptop computer hinge. A coupled-fed loop antenna was used because of its suitability for integration with the ground plane and achieving wide operating bands. This antenna can not only be configured to have a compact configuration but also be designed to excite several resonant modes of the hinge slot between the display ground plane and the keyboard ground plane. The proposed antenna comprises a hook-shaped strip and a shorted strip, which together form a coupled-fed loop that not only has a compact size when printed on a 0.8-mm-thick FR4 substrate 40 × 8 mm2 in size but also provides eight-band LTE/WWAN operation. The proposed antenna can cover LTE/WWAN operation in the 698–960 and 1710–2690 MHz bands. Details of the antenna structure are provided here. The proposed antenna was fabricated and tested, and measurement and simulation results are presented. The measured antenna efficiency was approximately 45–80% in the lower band and approximately 52–75% in the upper band.


Corresponding author

Corresponding author: S.-C. Chen Email:


Hide All
[1] 3GPP Long Term Evolution: 2013 [Online]. Available at:
[2] Wong, K.L.; Tsai, C.Y.: Combined-type triple-wideband LTE tablet computer antenna. Microw. Opt. Technol. Lett., 57 (2015), 12621267.
[3] Wong, K.L.; Liao, Z.G.: Small-size dual-wideband monopole antenna with inductive and capacitive feeding branches for LTE tablet computer application. Microw. Opt. Technol. Lett., 57 (2015), 853860.
[4] Wong, K.L.; Liao, Z.G.: Passive reconfigurable triple-wideband antenna for LTE tablet computer. IEEE Trans. Antennas Propag., 63 (2015), 901908.
[5] Kang, T.W.; Wong, K.L.: Simple two-strip monopole with a parasitic shorted strip for internal eight-band LTE/WWAN Laptop Computer. Microw. Opt Technol. Lett., 53 (2011), 706712.
[6] Wong, K.L.; Lin, W.J.: WWAN/LTE printed slot antenna for tablet computer application. Microw. Opt Technol Lett., 54 (2012), 4449.
[7] Wong, K.L.; Chang, Y.W.; Chen, S.C.: Bandwidth enhancement of small-size planar tablet computer antenna using a parallel-resonant spiral slit. IEEE Antennas Wireless Propag., 60 (2012), 17051711.
[8] Wong, K.L.; Wu, T.J.: Small-size LTE/WWAN coupled-fed loop antenna with band-stop matching circuit for tablet computer. Microw. Opt. Technol. Lett., 54 (2012), 11891193.
[9] Lu, J.H.; Wang, Y.S.: Internal uniplanar antenna for LTE/GSM/ UMTS operation in a tablet computer. IEEE Antennas Wireless Propag., 61 (2013), 28412846.
[10] Wong, K.L.; Liu, Y.C.; Chou, L.C.: Bandwidth enhancement of WWAN LTE tablet computer antenna using embedded parallel resonant circuit. Microw. Opt. Technol. Lett., 54 (2012), 305309.
[11] Wong, K.L.; Chen, M.T.: Small-size LTE/WWAN printed loop antenna with an inductively coupled branch strip for bandwidth enhancement in the tablet computer. IEEE Antennas Wireless Propag., 61 (2013), 61446151.
[12] Lu, J.H.; Tsai, F.C.: Planar internal LTE/WWAN monopole antenna for tablet computer application. IEEE Antennas Wireless Propag., 61 (2013), 43584363.
[13] Wong, K.L.; Chen, L.Y.: Small-size LTE/WWAN tablet device antenna with two hybrid feeds. IEEE Antennas Wireless Propag., 62 (2014), 29262934.
[14] Chen, L.Y.; Wong, K.L.: 2.4/5.2/5.8 GHz WLAN antenna for the ultrabook computer with metal housing, 2013 National Symp. Telecommunications, Taiwan, 2013.
[15] Chang, S.H.; Liao, W.J.: A compact 3D antenna with comprehensive LTE band coverage for use on notebook hinge, IEEE Asia-Pacific conf. on antennas and propagation, Singapore, 2012.
[16] Ban, Y.L.; Chen, J.H.; Sun, S.C.; Li, J.L.-W.; Guo, J.H.: Printed wideband antenna with chip-capacitor-loaded inductive strip for LTE/GSM/UMTS WWAN wireless USB dongle applications. Prog. Electromag. Res., 128 (2012), 313329.
[17] Ban, Y.L.; Chen, J.H.; Ying, L.J.; Li, J.L.W.; Wu, Y.J.: Ultrawideband antenna for LTE/GSM/UMTS wireless USB dongle applications. IEEE Antennas Wireless Propag. Lett., 11 (2012), 403406.
[18] ANSYS HFSS: Ansoft Corp., Pittsburgh, PA, Available at:


Small embedded LTE/WWAN antenna integrated with keyboard ground plane in a laptop computer

  • Shu-Chuan Chen (a1), Yun-Tsan Lee (a1) and Po-Wei Wu (a2)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed