Title page for etd-0613112-153031


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URN etd-0613112-153031
Author Wun-Jian Lin
Author's Email Address linwj@ema.ee.nsysu.edu.tw
Statistics This thesis had been viewed 5358 times. Download 360 times.
Department Electrical Engineering
Year 2011
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Ground Antenna for Slim Mobile Communication Devices
Date of Defense 2012-06-02
Page Count 68
Keyword
  • Half-loop antennas
  • Surface current distribution
  • Hearing aid compatibility
  • Specific absorption rate
  • Ground antennas
  • LTE/WWAN antennas
  • Internal handset antennas
  • Abstract In this thesis, two types of handset antenna design respectively for dual-band GSM850/1900 operation and seven–band LTE/WWAN operation are presented. The proposed antennas can achieve decreased antenna size and enhanced operating bandwidth by shaping the system ground plane of the handset. The seven-band LTE/WWAN antenna is printed on the system circuit board with good radiation characteristics and occupies a small size of 24.5 x 10 mm2. At first, we propose a half-loop antenna structure which integrates its facing edge of the system ground plane as the resonant path of the antenna. In this case, the required length of the half-loop antenna structure is only about a half compared with the traditional loop antenna. Next, to enhance the operating bandwidth of the antenna, a parasitic shorted monopole strip is added and a shaped system circuit board is used. The shaped system circuit board can integrate the battery with the circuit board to help reduce the thickness of handset. Also, much enhanced operating bandwidth for the lower band can be obtained, owing to the enhanced surface current excitation in the system ground plane resulting from properly shaping the system circuit board. Effects of the user’s head and hand on the proposed antenna are studied, and the simulated SAR and HAC results are also analyzed for bio-compatibility issue.
    Advisory Committee
  • Wen-Shuang Chen - chair
  • Yung-Tao Liu - co-chair
  • Wen-Hsiu Hsu - co-chair
  • Horng-Dean Chen - co-chair
  • Kin-Lu Wong - advisor
  • Files
  • etd-0613112-153031.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2012-06-13

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