Title page for etd-0624114-173247


[Back to Results | New Search]

URN etd-0624114-173247
Author Chi-Rung Fang
Author's Email Address No Public.
Statistics This thesis had been viewed 5577 times. Download 4478 times.
Department Electrical Engineering
Year 2013
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Mobile Devices Antenna for LTE MIMO Operations
Date of Defense 2014-07-09
Page Count 41
Keyword
  • multiband antenna
  • LTE
  • MIMO
  • isolation enhancement
  • Antenna
  • Abstract This thesis mainly discusses the design of LTE multi-band antennas for the applications of the LTE communication systems. The proposed antenna is also suitable for being embedded in smart mobile devices. A monopole antenna resonates at a frequency of 1.8 GHz was designed as the reference antenna. Then, two resonant frequencice of 700 and 900 MHz were obtained by coupling two shorting strips to the reference antenna. Finally, good impedance matching can be obtained by adjusting the strip width. The proposed multi-band antenna achieved good impedance matching over operating bands of the LTE 700, LTE/GSM 900, LTE/DCS 1800, PCS 1900 and UMTS under S11 ≤ -6 dB criterion. In addition, this antenna element was further applied to multiple-input multiple-output (MIMO) antenna communication system. A simple isolator was designed and placed it between two antenna elements. In this case, the S21 achieves near -15 dB near 1.8 GHz and the generally acceptable standard S21 < -10dB for the LTE applications. The overall antenna size is of only 50 × 20 × 0.8 mm3 that can be easily realized on the printed circuit board. Antenna parameters such as reflection coefficient was measured to validate the proposed antennas. Detail parameters studies and measurement data were performed in the thesis.
    Advisory Committee
  • Chih-Wen Kuo - chair
  • Hsin-Lung Su - co-chair
  • Pu-Hua Deng - co-chair
  • Hsing-Feng Chen - co-chair
  • Ken-Huang Lin - advisor
  • Files
  • etd-0624114-173247.pdf
  • Indicate in-campus at 1 year and off-campus access at 1 year.
    Date of Submission 2014-07-26

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys