本論文針對船舶自動識別系統VHF與UHF雙頻天線以及雷達系統毫米波陣列天線之應用進行研究。第一部份首先提出一款採用袖套偶極天線所設計之雙頻天線，其在水平面有良好之全向性輻射場型，以滿足船舶間通訊之需求。不過由於機構製程之因素，本論文再提出一款採用不同管徑組合之雙頻偶極天線設計。為了避免同軸電纜不平衡下的影響，在饋入電纜乃加上巴倫器之設計，並且本研究使用本校無反射實驗室進行反射係數與輻射場型之量測，而所得量測結果與模擬趨勢相當一致。第二部分為針對24GHz雷達系統之毫米波天線設計進行開發，其中乃應用串列式微帶陣列天線設計搭配前端電路設計，如巴倫器、濾波器、直流阻隔器等，並且藉由改變陣列編排的技巧及饋入形式，可設計出不同天線增益與輻射場型，以滿足不同情境之應用需求。

This thesis consists two parts. First part presents a dual band sleeve dipole antenna for automatic identification system. The antenna covers VHF and UHF bands, which has a good omni-directional radiation pattern in the horizontal plane to meet the needs of the communications between ships. However, for reducing manufacture cost and allowing convenient installations, another dual band dipole antenna design is proposed, which is constructed by combining two concentric cylinders having different radii and lengths. Also, balun is added in the feeding cable to avoid the unbalance effects of the coaxial cable connecting the dipole. Good agreements between simulations and measurements are obtained. The second part proposes series-fed microstrip patch array antennas for a 24GHz radar system. To integrate the millimeter-wave antennas with the radar module, RF front end circuits, such as balun, filter and DC block, are added to satisfy the requirements of the radar module. By varying the layout of the array and feed, different antenna gain and radiation patterns can be obtained for applications in different scenarios.

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