Theoretical analysis and application of fractal antenna 賴信達、吳俊德
E-mail: 321366@mail.dyu.edu.tw
ABSTRACT
In this paper, planar antennas based on fracral structure will be present. Using the fractal structure, a compact and wideband antenna is designed. Analysis of Koch curve indicates the performance of antennas will depend on iteration factor. As long as the iteration order increases, the bandwidth can increase 50%. First, we use HFSS to simulate the performance of the 50Ω-feed designed antenna. Second, use AutoCAD to draw the layout of the designed antenna. Third, etch the designed antenna on FR4.
Finally measured the antenna by network and analyzer the result.
Keywords : iteration factor、iteration order
Table of Contents
封面內頁 簽名頁 授權書...iii 中文摘要...iv 英文摘要...v 誌
謝...vi 目錄...vii 圖目錄...ix 表目錄...xi 第一章 序論 1.1 前言...1 1.2研究動機...2 1.3章節概要...2 第二章 碎形介紹與理論分析 2.1碎形由 來...4 2.2碎形天線...6 2.3 Koch fractal概要...8 2.4 Koch curve理論分析...8 第三章 碎形天線設計 3.1 設計簡介...12 3.2架構模型簡述...12 3.3 模擬與量測反射損耗結果討論...16 3.4 模擬與量測場型結果討論...24 第四章 碎形天線之星形挖槽 4.1設計簡介...35 4.2模擬與量測反射損耗結 果討論...37 4.3模擬與量測場型結果討論...41 第五章 結論...47 參考文獻...48 附 錄...49
REFERENCES
[1]劉明彥，平面型超寬頻天線之設計，碩士論文，大葉大學電信工程學系研究所，2005 [2]方秋詠，平面碎形天線之研製，碩士論文，
國立高雄應用科技大學光電與通訊工程研究所，2007 [3]D. H. Wemer and S. Ganguly, “An Overview of Fractal Antenna Engineering Research,” Antenna and Propagation, Magazine, IEEE Volume 45, Issue 1, Feb. 2003 page(s):38-57 [4]W. L. Chen, G. M. Wang and C. X.
Zhang, “Bamdwidth Enhancement of a Microstrip-Line-Fed Printed Wide-Slot Antenna with a Fractal-Shaped Slot,” Antenna and Propagation, IEEE Transactions on Volume 57, Issue 7, July 2009 [5]D. C. Chang, B. H. Zeng, J. C. Liu, I. Chen, L. G. Jang and C. C. Chang, “A
Self-complementary Hilbert-curve Fractal Antenna for UHF RFID Tag Applications,” Antennas and Propagation Society Intemational Symposium, 2008. AP-S 2008. IEEE [6]C. P. Baliarda, J. Romeu, R. Pous, A. Cardama, “On the Behavior of the Sierpinski Multiband Fractal Antenna,” Antennas and Propagation, IEEE Transations on Volume 46, Issue 4 1998 [7]K. C. Hwang, “Broadband circularly-polarised Spidron fractal slot antenna,” Electronics Letters Volume 45, Issue 1 2009
