Title page for etd-0523115-161205


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URN etd-0523115-161205
Author Pei-rong Wu
Author's Email Address No Public.
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Department Electrical Engineering
Year 2014
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Low-Profile Open-Slot LTE Smartphone Antenna and Its MIMO Performance Study
Date of Defense 2015-06-07
Page Count 88
Keyword
  • LTE antennas
  • slot antennas
  • open slot antennas
  • Low-profile antennas
  • mobile antennas
  • passively reconfigurable antennas
  • MIMO antennas
  • Abstract Two different kinds of low-profile open-slot antenna to achieve a low profile of 7 and 5 mm, respectively, to cover the LTE operation (698~960/1710~2690 MHz) in the smartphone, especially the metal-casing smartphone, are demonstrated. The first antenna which shows a low profile of 7 mm to the top or bottom edge is a low-profile slot antenna that can be integrated with the USB connector. In this design, the antenna consists of one longer inverted-L (IL) open slot and one shorter IL open slot and is excited by the first and second feeds, respectively, to generate the fundamental (0.25-wavelength) resonant modes at the low and high bands. By adding wideband matching circuits in the first and second feeds, the antenna can provide two wide operating bands covering the 698~960 MHz and 1710~2690 MHz bands. The second antenna which has a very low profile of 5 mm uses one IL slot with two open ends as the main structure, with a distributed inductor and a chip capacitor embedded therein. The embedded circuit elements can passively reconfigure the resonant slot paths of the IL slot to generate multiple slot resonant modes in the low and high bands. In this case, the first antenna structure can be simplified from two IL open slots to only one IL open slot and also cover the desired LTE bands with the aid of the wideband matching circuit. Finally, two antennas of the first or second design are placed respectively at the top and bottom edges of the system ground plane for the 2  2 LTE MIMO operation. The MIMO performance of these designs are studied and discussed.
    Advisory Committee
  • Hong-Twu Chen - chair
  • Wen-Shan Chen - co-chair
  • Hua-Mig Chen - co-chair
  • Kin-Lu Wong - advisor
  • Files
  • etd-0523115-161205.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2015-06-23

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