共面波導饋入平面化對數週期偶極天線之研製

Design and Implementation of CPW fed Planar Log-periodic Dipole Antennas

楊忠智(Chung-Chih Yang)

指導教授 ： 林怡成

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2006年)

https://doi.org/10.6342/NTU.2006.10215

摘要

對數週期偶極天線屬於一種具有平穩增益和寬廣頻寬的線性極化天線。本論文就對數週期偶極天線平面化的設計架構加以論述。不同於傳統的對數週期偶極天線，此天線饋入方式是利用夾心帶線結構將能量傳輸到天線前端並產生一組差動訊號饋入偶極陣列。
在這篇論文中，我們使用共面波導結構轉接此平面化對數週期偶極天線，設計出在1.7GHz -11GHz的工作頻寬內，天線平均增益為6dBi，交叉極化隔離達到15dB，front-to-back ratio也達到15dB的天線，並且實際製作電路板量測天線表現與模擬結果作比較。

關鍵字

對數週期偶極天線

並列摘要

The log-periodic dipole antenna is a linearly polarized frequency independent antenna of moderate gain. In this thesis, we describe the design of the printed planar log periodic dipole antenna. The feeding technique of this antenna is different from the tradition log periodic dipole antenna. It utilizes stripline geometry transmit energy to the small end of the antenna and excites a differential signal to feed dipole array.
In this thesis, we use coplanar waveguide geometry to transfer this printed planar log periodic dipole antenna. We design the antenna with average gain around 6dBi, cross-polarization isolation around 15dB, and front-to-back ratio around 15dB in 1.7-11GHz bands. We manufacture the PCB actually and measure the antenna performances to compare with the results of simulation.

並列關鍵字

log-eriodic dipole antenna

參考文獻

[1] D.E. Isbell, “Log periodic dipole arrays,” IRE Trans. Antennas Propagat., AP-8, pp.260-267, May, 1960.

[3] Jones K., Mayes P.,” Continuously Scaled Transmission Lines with Applications to Log-Periodic Antennas,” IEEE Tran. Antennas Propagat. Jan 1969.

[4] Bantin C., Balmain K.,” Study of Compressed Log-Periodic dipole antennas,” IEEE Tran. Antennas Propagat. Mar 1970.

[5] Samuel C. Kuo, ”Size-reduced Log-periodic Dipole Array,” Antennas Propagat. Sep 1970.

[6] Wolter J.,” Solution of Maxwell's Equations for log-periodic dipole antennas,” IEEE Tran. Antennas Propagat. Nov 1970.