近幾年來，車用輔助系統蓬勃發展，主動車距調節定速(ACC)已成為常見的車用電子輔助，傳統的車用雷達中心頻率為24 GHz，然而隨著處理資訊量上升以及高解析度的趨勢，逐漸不符需求，因此現階段主要使用76-81 GHz頻帶，憑藉著高頻寬、低干擾的優勢，得以滿足現今車用雷達的需求，逐漸成為主流。
目前ACC系統的天線設計在PCB上為主，其天線與射頻晶片需保持一段距離來避免輻射彼此間的干擾，然而這樣的電路佈局會增加整體系統面積，且成本難以降低，若能整合天線封裝(AiP)技術，則可以大幅縮小面積，達到小型化與降低成本的優勢。
本論文提出串饋式封裝貼片天線，工作頻率為77 GHz，設計應用於長距離車用雷達系統，首先以1x6串饋天線陣列為基礎，以漸進式貼片結構(Tapering Patch)、嵌入式饋入(Inset Feeding)控制、調整天線的電流分布，集中波束，達到更佳輻射場型，並加上寄生貼片，透過耦合提高增益，最後以電磁能隙(EBG)提升隔離度，降低天線之間的相互干擾，最終延伸為4x6天線陣列，單一天線可以達到較高的增益，增益大於12 dBi，旁波瓣低於-16 dB，且頻寬約7%，涵蓋整個76 GHz至81 GHz車用雷達頻段。

In recent years, advanced driver assistance systems (ADAS) have been developed vigorously. Adaptive Cruise Control (ACC) systems have become a common vehicle electronic assistance system. The traditional vehicle radar operated at 24 GHz. However, with the increase in the amount of processing information and high-resolution., the 76-81 GHz frequency band is mainly used for automotive radar antenna nowadays. With the advantages of broad bandwidth and lower interference, it can meet the demand of automotive radar and become the main design.
The antenna design of the ACC system is mainly based on the PCB, and the antenna and the RF chip need to keep a certain distance to avoid radiation interference between each other. However, such a circuit layout will increase the module area, and the cost is difficult to reduce. Using AIP technology, the area can be greatly reduced and the module can be minimized to achieve low-cost. This thesis proposed a series-fed packaged patch antenna which operates at 77 GHz. Inset feeding and tapering patch are used to control the current distribution on patches and make the main beam more concentrated to get a better radiation pattern. Adding parasitic patches can increase coupling and achieve higher antenna gain. Then, the electromagnetic energy gap (EBG) is used to improve the isolation and reduce the mutual interference between antennas. In final step, the antenna extended to 4x6 antenna array whose bandwidth is about 7%, covering the entire 76 GHz to 81 GHz automotive radar frequency band.

論文審定書 i
致謝 ii
摘要 iii
Abstract iv
目錄 v
圖次 vii
表次 x
第一章 緒論 1
1.1 研究動機 1
1.2 文獻回顧 3
1.3 研究方法與目的 6
1.4 論文大綱 7
第二章 串饋天線 8
2.1 貼片天線簡介 8
2.2 串饋天線基本原理 9
2.3 77GHz串饋天線 11
第三章 77GHz串饋天線結構改良分析 15
3.1 低旁波瓣結構 15
3.2 電磁能隙元件 22
3.3 寄生貼片 27
第四章 疊層封裝結構 35
4.1 導入封裝製程設計 35
4.2 天線模擬與量測數據比較 40
第五章 車用雷達陣列 43
5.1 天線陣列理論 43
5.2 4x6天線陣列 44
第六章 結論 49
參考文獻 50

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