無線通訊產業的蓬勃發展，促使技術發展越趨成熟，其應用也更加多元，天線設計需求與以往相較也有所變化。行動裝置平台諸如平板電腦、智慧型手機和筆記型電腦等，都有新的難題需要克服。以筆記型電腦為例，金屬邊框或窄邊框螢幕的流行趨勢，使可利用空間進一步壓縮，讓天線設計面臨更嚴苛的挑戰。
本論文第一部份提出一款可應用於緊湊布局結構，操作於Sub-6 GHz的n78 頻段雙模態槽孔天線設計，天線尺寸為10 × 8 mm2。該天線設計以單一饋入，藉由兩個槽孔共振路徑，產生兩個共振模態以涵蓋目標頻段。其雙模態的特性在雙頻或寬頻的應用上亦具有發展性。該天線可放置於緊湊布局的解耦合架構，而不影響原有天線的解耦合效果，為一款可實際應用於筆電基座的天線設計。
論文第二部份提出一款可放置於金屬邊框螢幕上的WLAN雙頻天線設計，尺寸僅為23.8 × 3 × 4 mm3。該天線設計利用金屬邊框的環境特色，創造IFA與槽孔共構的型式，天線面所需寬度只有3 mm，在窄螢幕邊框的嚴苛環境中具有競爭力。吾人以該天線設計一個四天線系統，以不同配置方式放置於螢幕邊緣，並分析天線間的耦合程度。在適當的配置設計下，天線間隔離度皆可大於15 dB，能夠支援MIMO技術，達到提升傳輸率的目的。

Owing to the rapid development of wireless communication technologies, various applications have been developed. Comparing to conventional antenna needs, the required antenna features of state-of- the-art wireless protocols are different. Mobile devices, such as tablets, smart phones and notebooks, have new issues to be resolved. Take notebooks for example, metal frame and narrow screen bezel designs become very popular. This reduces the space available for antenna structures and makes the design quit challenging.
The first part of this thesis proposes a dual-mode slot antenna design that can be applied to a compact space and operates in the n78 band of 5G mobile communication. The antenna sizes are 10 × 8 mm2. The antenna contains a single feed, and two resonance modes are generated on two distinctive resonance paths to cover the desired 3.3 to 5 GHz band. Its dual-mode characteristic can be utilized to cope with dual-band and broadband applications.
The second part proposes a WLAN dual-band antenna design that can be placed on the bezel region of a metal-framed screen. The antenna sizes are 23.8 × 3 × 4 mm3. The antenna design employs the metal frame structure to integrate an inverted-F antenna within slots. The antenna width is merely 3 mm, which is competitive toward the application on screens with narrow bezels. A four-antenna system is also proposed. Antennas are placed on different locations of the screen bezels. Performances of antenna matching and couplings among antennas are accessed for different antenna displacement scheme. With a proper configuration, the isolation between antennas can be greater than 15 dB, which can support MIMO technology and enhance the transmission throughout.

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