ISSN 0253-2778

CN 34-1054/N

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Design of the built-in LTE antenna of laptop computers for 4G communication

  • Key Lab of Intelligent Computing & Signal Processing, Ministry of Education, Anhui University, Hefei 230039, China

Cite this:
https://doi.org/10.3969/j.issn.0253-2778.2014.04.002
  • Received Date: 17 May 2013
  • Accepted Date: 04 September 2013
  • Rev Recd Date: 04 September 2013
  • Publish Date: 30 April 2014
    Abstract

  • Abstract

    A coupled-fed shorted monopole with a planar inverted-F antenna(PIFA) feed structure as an effective radiator for eight-band LTE operation in the laptop computer was presented. The antenna used a 50 Ω coaxial cable to feed signal into PIFA branch, and thus the energy of PIFA branch was fed into the shorted monopole branch due to the coupling effect of the capacitors. The coupling of the two branches produced multiple resonant modes, broadening the antenna band. The measured results show that the efficiency of the proposed LTE antenna exceeds 47%, with a return loss of less than -6 dB. The advantages of the presented antenna include its simple structure, broadened bandwidth, easier manufacturing and lowered cost, compared with conventional LTE antennas.

    Abstract

    A coupled-fed shorted monopole with a planar inverted-F antenna(PIFA) feed structure as an effective radiator for eight-band LTE operation in the laptop computer was presented. The antenna used a 50 Ω coaxial cable to feed signal into PIFA branch, and thus the energy of PIFA branch was fed into the shorted monopole branch due to the coupling effect of the capacitors. The coupling of the two branches produced multiple resonant modes, broadening the antenna band. The measured results show that the efficiency of the proposed LTE antenna exceeds 47%, with a return loss of less than -6 dB. The advantages of the presented antenna include its simple structure, broadened bandwidth, easier manufacturing and lowered cost, compared with conventional LTE antennas.
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    • References(9)
  • [1]
    Wang X, Chen W, Feng Z. Multiband antenna with parasitic branches for laptop applications[J]. Electronics Letters, 2007, 43(19): 1 012-1 013.
    [2]
    Wong K L, Chang Y W, Chen S C. Bandwidth enhancement of small-size planar tablet computer antenna using a parallel-resonant spiral slit[J]. IEEE Transactions on Antennas and Propagation, 2012, 60(4): 1 705-1 710.
    [3]
    Wong K L, Chen W J, Chou L C, et al. Bandwidth enhancement of the small-size internal laptop computer antenna using a parasitic open slot for penta-band WWAN operation[J]. IEEE Transactions on Antennas and Propagation, 2010, 58(10): 3 431-3 435.
    [4]
    Wong K L, Chen W J, Kang T W. Small-size loop antenna with a parasitic shorted strip monopole for internal WWAN notebook computer antenna[J]. IEEE Transactions on Antennas and Propagation, 2011, 59(5): 1 733-1 738.
    [5]
    Wong K L, Ma P J. Small-size internal antenna for LTE/WWAN operation in the laptop computer[C]// International Conference on Applications of Electromagnetism and Student Innovation Competition Awards. Taipei, China: IEEE Press, 2010, (10): 152-156.
    [6]
    Kang T W, Wong K L, Chou L C, et al. Coupled-fed shorted monopole with a radiating feed structure for eight-band LTE/WWAN operation in the laptop computer[J]. IEEE Transactions on Antennas and Propagation, 2011, 59(2): 674-679.
    [7]
    Chang S H, Liao W J. A broadband LTE/WWAN antenna design for tablet PC[J]. IEEE Transactions on Antennas and Propagation, 2012, 60(9): 4 354-4 359.
    [8]
    Hu C L, Lee W F, Yang C F, et al. A compact multiband inverted-F antenna for LTE/WWAN/GPS/WiMAX/WLAN operations in the laptop computer[J]. IEEE Antennas and Wireless Propagation Letters, 2010, (9): 1 169-1 173.
    [9]
    Ansoft Corporation. High Frequency Structure Simulator[EB/OL]. http://www.ansoft.com/products/hf/hfss/.
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    [1]
    Wang X, Chen W, Feng Z. Multiband antenna with parasitic branches for laptop applications[J]. Electronics Letters, 2007, 43(19): 1 012-1 013.
    [2]
    Wong K L, Chang Y W, Chen S C. Bandwidth enhancement of small-size planar tablet computer antenna using a parallel-resonant spiral slit[J]. IEEE Transactions on Antennas and Propagation, 2012, 60(4): 1 705-1 710.
    [3]
    Wong K L, Chen W J, Chou L C, et al. Bandwidth enhancement of the small-size internal laptop computer antenna using a parasitic open slot for penta-band WWAN operation[J]. IEEE Transactions on Antennas and Propagation, 2010, 58(10): 3 431-3 435.
    [4]
    Wong K L, Chen W J, Kang T W. Small-size loop antenna with a parasitic shorted strip monopole for internal WWAN notebook computer antenna[J]. IEEE Transactions on Antennas and Propagation, 2011, 59(5): 1 733-1 738.
    [5]
    Wong K L, Ma P J. Small-size internal antenna for LTE/WWAN operation in the laptop computer[C]// International Conference on Applications of Electromagnetism and Student Innovation Competition Awards. Taipei, China: IEEE Press, 2010, (10): 152-156.
    [6]
    Kang T W, Wong K L, Chou L C, et al. Coupled-fed shorted monopole with a radiating feed structure for eight-band LTE/WWAN operation in the laptop computer[J]. IEEE Transactions on Antennas and Propagation, 2011, 59(2): 674-679.
    [7]
    Chang S H, Liao W J. A broadband LTE/WWAN antenna design for tablet PC[J]. IEEE Transactions on Antennas and Propagation, 2012, 60(9): 4 354-4 359.
    [8]
    Hu C L, Lee W F, Yang C F, et al. A compact multiband inverted-F antenna for LTE/WWAN/GPS/WiMAX/WLAN operations in the laptop computer[J]. IEEE Antennas and Wireless Propagation Letters, 2010, (9): 1 169-1 173.
    [9]
    Ansoft Corporation. High Frequency Structure Simulator[EB/OL]. http://www.ansoft.com/products/hf/hfss/.
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