許博文臺灣大學：電信工程學研究所蘇慬Su, ChinChinSu2007-11-272018-07-052007-11-272018-07-052007http://ntur.lib.ntu.edu.tw//handle/246246/58923本論文以一種簡單的饋入結構來設計具有超寬頻特性的梯型偶極天線，即是以兩平行帶線組合成的傳輸線，自中心饋入至非對稱性的梯型偶極天線。偶極天線的雙臂及其相連的平行帶線分別印製在 FR4 基板的兩側。此天線可涵 3.1GHz ~10.6 GHz 的超寬頻頻帶, 並具有近於全向性的場型及穩定增益的特性。A UWB planar trapezoidal dipole antenna with a simple feeding structure is proposed. In our design, the printed asymmetric dipole antenna is center-fed by a transmission line which consists of two parallel strip lines. The two arms of the dipole with two parallel feeding lines are separately printed on the opposite sides of the FR4 substrate. The proposed antenna, which can cover the frequency range of 3.1~10.6GHz with return loss level of 10dB, has almost omni-directional radiation patterns and gain flatness property within the entire UWB frequency band.Chapter 1 Introduction.....................................................................1 1.1 Motivation...............................................................................................1 1.2 Literature Survey.....................................................................................2 1.3 Chapter outline........................................................................................4 Chapter 2 Double-Sided Printed Trapezoid Dipole Antenna............................................................................9 2.1 Geometric configuration........................................................................9 2.2 Design procedure and parameter analysis............................................10 2.2.1 Symmetric structure & parameter analysis...............................10 2.2.2 Asymmetric structure & parameter analysis.............................12 2.3 Summary..............................................................................................14 Chapter 3 Experimental Results...............................................29 Chapter 4 Conclusions....................................................................49 References..................................................................................................51962792 bytesapplication/pdfen-US超寬頻天線梯型偶極天線平行帶線平面型天線UWBantennadipoleparallel strip linet rapzoidthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/58923/1/ntu-96-R94942031-1.pdf