本篇論文提出一種使用微帶線去激發L型槽孔和C型槽孔的天線。C型槽孔是以一方型槽孔為主,並在一段上用金屬取代槽孔所形成,在此研究乃是把L型槽孔嵌入C型槽孔內且得到一支雙頻圓形極化的天線設計。而最主要的控制因素是L型槽孔的寬度;在經過調整後,我們可以分別在1.575GHz and 2.45GHz得到5.7%和6.1%的圓形極化頻寬。
A combination of a C-shaped and an L-shaped slot antenna excited by a microstripline is presented in this thesis. The C-shaped slot is modified from a square slot ring by replacing one segment of the slot ring with a metal. It is studied by embedding one L-shaped slot inside the C-shaped slot, a dual-band circularly polarized antenna can be formed. The main controlling parameter is the width of the L-shaped slot. After tuning, we can get 5.7% axial ratio bandwidth and 6.1% axial ratio bandwidth respectively in 1.575GHz and 2.45GHz band