Title page for etd-0525118-154511


[Back to Results | New Search]

URN etd-0525118-154511
Author Bo-Wei Lin
Author's Email Address No Public.
Statistics This thesis had been viewed 5346 times. Download 0 times.
Department Electrical Engineering
Year 2017
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Wideband MIMO Antennas for the 5G Smartphone
Date of Defense 2018-06-20
Page Count 52
Keyword
  • channel capacity
  • MIMO antennas
  • Inverted-F antennas
  • fifth-generation mobile communication
  • 5G smartphones
  • Loop antennas
  • Abstract The frequency band of 3300~5000 MHz considered in the study has recently been identified by many countries to be potentially available in the fifth-generation (5G) mobile communication below 6000 MHz. It is therefore necessary for the 5G MIMO antennas to cover the wide band of 3300~5000 MHz. There are two wide band 5G MIMO antennas presented in this thesis. The first design is a hybrid inverted-F/loop antenna, which can generate a 0.25λ inverted-F antenna resonant mode and a 0.25λ loop antenna resonant mode. The two modes are combined into a wide band to cover 3300~5000 MHz. In addition, with a wide band obtained, the antenna requires a small planar size of 5 × 12 mm2. For such four 5G antennas, its total length along the side-edge frame of the smartphone is 75 mm only. Furthermore, in order to operate in heterogeneous networks, such as the mobile network and the wireless local area network (WLAN), 5G/WLAN MIMO antennas for the second design are presented. The 5G/WLAN MIMO antennas are based on the first design. By adding an additional loop antenna resonant path to the first design, it can cover 2400~2500, 3300~5000, and 5100~5900 MHz. The 5G/WLAN MIMO antenna has a small planar size of 5 × 25 mm2 and is also disposed along the side-edge frame of the smartphone. Good envelope correlation coefficients and isolation of the two 5G/WLAN MIMO antennas is obtained by placing the antennas’ radiators which contribute different resonant modes to face each other. In this case, two 5G/WLAN MIMO antennas can be spaced by 5 mm only to achieve acceptable decoupling. Finally, the six-antenna structure composed of the above two designs is presented to provide six 5G bands and two WLAN bands. From the obtained experimental results, the proposed six-antenna structure is promising for the 6 × 6 5G MIMO and 2 × 2 WLAN MIMO operations.
    Advisory Committee
  • Yuan-Chih Lin - chair
  • Wei-Yu Li - co-chair
  • Kin-Lu Wong - advisor
  • Files
  • etd-0525118-154511.pdf
  • Indicate in-campus at 99 year and off-campus access at 99 year.
    Date of Submission 2018-06-25

    [Back to Results | New Search]


    Browse | Search All Available ETDs

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