本篇論文提出了三款筆記型電腦使用的天線設計，利用磁天線高度較低、與金屬環境相容、方便與機構整合的特點，以平面式或立體式架構配合機身金屬環境，達到可操作於WLAN雙頻的效果，可符合目前筆記型電腦金屬機身的設計趨勢。
論文中第一款設計為應用於筆電金屬環境的無開窗WLAN雙頻天線，其結構直接施作於金屬機殼上。WLAN低頻段天線為四分一波長平面倒F型結構，其高頻頻段由兩個模態包覆，高頻第一個模態為平面倒F型上緣的半波長共振，高頻第二個模態則藉由單端開路的槽孔天線提供，由這三個模態涵蓋2.4-2.48 GHz 與5.15-5.85 GHz 頻帶。
第二款天線設計為應用於筆電內富含金屬結構環境的雙模態貼片天線，其結構由兩個共振腔疊合，分別提供WLAN高低頻模態，以單一饋入方式激發兩個共振腔中的模態，並使其達到全向性場型；經由實作及量測，驗證此款設計有良好的匹配、全向性場型及可接受的輻射效率。
第三款天線設計亦為應用於筆電富含金屬環境的多模態貼片天線，使用相同原理，以形成接近全向性場型，但結構簡化為單一共振腔，並引發高低頻多模態共振。架構簡單且擁有低姿態( low profile )，兩支短柱版本能完整涵蓋WLAN雙頻頻段。而最後提出的三支短路柱版本，將WLAN高頻帶涵蓋提升至7.125 GHz，可以應用於最新的Wi-Fi 6E頻段。量測所得的頻寬與場型都有不錯的表現，也有良好的輻射效能。以上提出的三款都可應用於筆電金屬機身設計，符合實際應用需求。

This thesis proposes three types of WLAN antenna designs for notebook computers. These antennas are can be integrate with a full metal-frame environment. By adopting a using a magnetic antenna configuration, which antenna characteristic are less sensitive to ward nearby metal object, which makes it compatible with metal frame environment.
In the first part, a windowless antenna surround by a metal enclosure is proposed. The low band resonance is provided by the quarter-wavelength planar inverted-F antenna. The high band contains two resonance modes, one comes from the half wavelength resonance on the edge of the PIFA, and the other is generated by the open ended slot. This antenna can be used in both WLAN bands.
The second antenna design is a dual-mode patch antenna. Its structure is formed by stacking two resonant cavities. Note, only one feed is used to excite the two cavities. By adding shorting pins within the cavity to omnidirectional pattern generates two electric field zeros the antenna resonates with a higher-order mode. The fabricated prototype shows good matching, fair radiation efficiency and an omnidirectional pattern.
The third antenna design is a multi-mode patch antenna. It also uses shorting pin to support a nearly omnidirectional pattern. Note, the structure is simplified as a single cavity. Both high and low frequency resonances are generated within this cavity. The structure is divided to left and right parts to support high band and low band resonant paths. The structure is simple and is of a low profile. Both WLAN bands can be attended dual-band. Three shorting pin version is also proposed to cover the WLAN high band to 7.125 GHz. Measured matching, bandwidth, radiation efficiency and patterns meet notebook product needs.

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