Research and design of satellite broadcast antenna

• Main Authors: Y.M. Chen, 陳彥銘
• Other Authors: M.C. Liang
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/04835121798553503512

碩士 === 義守大學 === 電子工程學系 === 91 === Abstract The CP designs are with a thick form aor a air substrate and are excited by using an aperture coupling or a three-dimensional transition microstrip feed line or a gap-couple probe feed. In this article we present a new design of a single-patch circularly polarized microstrip antenna with dual probe feeds connects to a T shape power divider having a 90 degree —phase shift between its two outputs. A thick air substrate is used in present proposed design ,and impedance matching is obtained through single-stub impedance matching. We excite two orthogonal linearly polarized elements with controlling the direction of current. We embed symmetrical slots in the circular patch. Good radiation characteristics are obvious ,with a peak antenna CP gain of about 7 dBi.