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Title page for etd-0626106-201819


URN etd-0626106-201819 Statistics This thesis had been viewed 1724 times. Download 23 times.
Author Guo-Yang Ni
Author's Email Address ngy1982@yahoo.com.tw
Department Communication Engineering
Year 2005 Semester 2
Degree Master Type of Document Master's Thesis
Language English Page Count 55
Title Dual-Band Circularly Polarized Antenna with QUAD-EMC structure
Keyword
  • QUAD-EMC structure
  • dual-band
  • circularly polarized antenna
  • circularly polarized antenna
  • dual-band
  • QUAD-EMC structure
  • Abstract In this paper, a method for obtaining a two-layer single-feed dual-band circularly polarized antenna with QUAD-EMC structure is proposed and studied. The proposed dual-band CP design is achieved by four identical patches uniformly displayed with a rectangular aperture and fed electromagnectically by a driven patch etched on a lower substrate. Then, by tuning upper and lower patch size and truncating patch corners respectively and properly, the proposed antenna can perform dual-band CP radiation using a single probe feed. Prototypes of the proposed antennas designed for RFID operations in the 915MHz and 2.45GHz bands are presented and experimentally demonstrated. Furthermore, an air-layer is added as a substrate behind the stacked FR4 substrate to enhance the gain and bandwidth of return loss of the proposed dual-band CP antenna. Finally, the bandwidth of return loss and gain of the dual-band CP antenna with an air layer are strongly enhanced.
    Advisor Committee
  • The-Nan Chang - advisor
  • Chien-Lun Hung - co-chair
  • Fu-Lai chu - co-chair
  • Files indicate in-campus access at one year and off-campus not accessible
    Date of Defense 2006-06-23 Date of Submission 2006-06-26


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