陶掑臺灣大學：電信工程學研究所廖志威liao, Zhi-WeiZhi-Weiliao2007-11-272018-07-052007-11-272018-07-052004http://ntur.lib.ntu.edu.tw//handle/246246/58652近年來，單面型天線在毫米波系統的應用相當的多。本論文主要的研究目標是將共面波導饋入蜿蜒曲線形開槽陣列天線設計於工作頻帶為38GHz至38.5GHz。本陣列天線以達到高增益為目標，輻射單元的數量頗多，我們使用兩種短路殘段(Short Stub)來當作匹配電路，成左滷N陣列天線之高輸入阻抗，匹配至傳輸線之特徵阻抗。 高增益的陣列天線，其主波瓣非常的窄，所以量測時必須確保天線不會因為量測轉台的轉動，而導致誤差產生。故我們設計了一個機構化的夾具，將轉台、天線及K-Connector三者加以固定在一起，置於無反射室內的轉台上。此夾具的弁酮陛G協助K-Connector的信號線能順利與天線的信號線接觸，且當馬達帶動轉盤上的天線而不至於搖瞻ㄘw，故可使得量測上的誤差降到最小。 基於製程的精度，我們設計了7×24的二維陣列天線，並加入輸入阻抗之匹配電路，由量測結果，我們驗證出此陣列天線的可行性。Recently, uniplanar antennas have been used in many applications in millimeter-wave systems. In this dissertation, we focus on the design of the CPW-fed meander line slot antenna array for operational frequency band from 38 to 38.5 GHz. Our design goal is to achieve a high gain antenna array. We utilize two kinds of short-stub as tuning networks to tune the high input impedance of the array to match the characteristic impedance of the feeding CPW. The main beam of a high gain antenna array is usually very narrow. To make the correct measurement, it must be ensured that the antenna array stands still against the rotation of a swivel table, which may lead to a measurement error. For this reason, we make a mechanized clamping apparatus to combine the swivel table, the antenna array, and the K-connector together. It is placed on the swivel table in the anechoic chamber in order to connect the signal part of both the K-connector and the antenna array. When the swivel table is driven by a motor, it will not be vacillating and staggering. Therefore, we can reduce the error of our measurement. To check the accuracy of our design, a planar meander line slot array with a matching circuit is fabricated and tested. From experimental results, this antenna array is proved to be practical and useful.Chapter 1 Introduction…..…….……………………..…… 1 1.1 Motivation and literature survey...............................1 1.2 Contributions………..…………...…………………6 1.3 Chapter outlines……..……………..………………7 Chapter 2 Coplanar Waveguide Fed Meander line Slot Antenna array………..….…………………......10 2.1 CPW-fed inductive slot dipole antenna……...……11 2.2 CPW-fed linear meander line slot antenna array.…13 2.3 CPW-fed planar meander line slot antenna array…15 2.4 The analysis of radiation pattern…………..…...…16 2.5 Input impedance matching with CPW series stub...22 2.6 Gain saturation phenomenon………...………...….26 Chapter 3 Setup of Far–Field Measurement…………......43 3.1 Pattern testing……..………….……..…..….….…43 3.2 Antenna gain measurement………………...…….46 3.3 Waveguide systems…………………….....….……48 3.4 A mechanized clamping apparatus for planar I meander line slot antenna array……………..…….49 Chapter 4 Simulation and Experimental Results………..59 4.1 Mesh refinement and gain definition of simulation tool………………………………………………..60 4.2 Maximum gain of planar meander line slot antenna array ( without matching circuit )………………...66 4.3 planar meander line slot antenna array….…67 4.4 Modified matching circuit topology for meander line slot array…………………………………………..72 Chapter 5 Conclusions………………………………….…90 Reference…………………………….……………………….92866407 bytesapplication/pdfen-US增益gainthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/58652/1/ntu-93-R91942055-1.pdf