微帶線饋入矩形基板集成波導天線設計

Design of the Microstrip-Fed Rectangle Substrate Integrated Waveguide Antenna

陳俊廷(Jyun-Ting. Chen)

指導教授 ： 劉文忠

國立虎尾科技大學/工程學院/航空與電子科技研究所/碩士(2012年)

https://doi.org/10.6827/NFU.2012.00018

摘要

本論文主要在研究X 波段(8GHz~12GHz)的基板集成波導天線設計，利用不同的饋
入方式與簡單的幾何圖形，設計兩種基板集成波導天線。
第一部分是利用微帶線饋入的方式，分別分析微帶線天線、基板集成波導天線與雙
環矩形基板集成波導天線在結構上的差異與優缺點，並在微帶線末端蝕刻出兩個環形的
矩形槽孔，藉由調整環形槽孔的數量與間距，改善阻抗匹配與共振頻率，接著調整矩形
槽孔的長度與位置，改善與加強輻射場形。最後在結論的部分總結本天線的結果。激勵
共振頻率為10.05 GHz，其整體尺寸為17x25 平方公厘 。
第二部分是利用共平面波導理論來設計新型天線，依據理論，阻抗是由訊號線寬度
與兩旁槽孔寬度決定，藉由距離的變化來觀察反射損耗與共振頻率。改變空氣柱的排列
與數目，除了能獲得較佳的反射損耗外，也發現接地面與輻射平面的作用區會影響阻抗
匹配。基於基板集成波導的原理，是利用上下兩層金屬板與左右兩排的通孔陣列，來限
制向外輻射的電磁波，故在通孔陣列了範圍內，設置背板，使天線的整體結構為共平面
波導一微帶線一基板集成波導三種結構的組合。接著分析背板對天線結構的影響，結果
發現背板長度增加時，背板與微帶線和接地面之間的LC 諧振效應，嚴重影響天線的阻
抗匹配。最後在結論的部分總結本天線的結果，共振頻率為8.66 GHz 時，天線的前後
比可以達到9dB，其整體尺寸為17x20平方公厘。

關鍵字

X 波段 ； 基板集成波導 ； 微帶線 ； 共平面波導

並列摘要

The primary research of this thesis is focused on the design of Substrate Integrated Waveguide (SIW) antenna for X band, putting the different fed and geometric figure to design two kinds of SIW antennas.

First, we utilize an antenna designed by micro-strip line, analyzing the difference between the micro-strip line antenna and substrate integrated waveguide antenna with its construction and affection. By etching two loops rectangular slots at the end of micro-strip line and adjusting its quantities and slots could improve its impedance matching. Its overall size is just only 17x25 which could generate a resonance at 10.05GHz.

Secondly, we use the coplanar waveguide thesis to design a new type antenna; according to the thesis, the impedance is decided by the width of signal line and the width of both sides of the slot. We obtain return loss by observing the variation of distance. Because of the principle of SIW is to utilize Upper and lower levels of metal plate and Around two rows of via hole array to limit the radiation electromagnetic wave, backplane should be set in the range of via hole array to make the integral structure of the aerial become a combination of three structures includes CPW-microstrip-SIW. Then analyze the impact of the backplane of the antenna structure and found that when the increase the length of the backplane, thebackplane and between the microstrip line and the ground plane of the LC resonance effect, seriously affecting the impedance matching of the antenna. when the resonance frequency is at 8.66GHz, the front-to-back ratio of antenna can achieve 9dB, and its overall size is 17x20

並列關鍵字

X band ； Substrate Integrated Waveguide (SIW), ； microstrip line ； coplanar waveguide

參考文獻

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