本論文主要是探討同頻天線間之隔離度的提升，論文是採用平面式WLAN (Wireless Local Area Network)雙頻天線設計中的低頻頻段(2.4~2.5G)為主，尺寸約為40 x 8 mm2以下；內容架構是依照三個章節分別以不同的設計去改善天線隔離度的分析。第二章先採用兩個相同的直接饋入方式之天線設計，在極小的天線距離下找出隔離度最佳的天線擺放方式作分析，其天線主體是以最常見的兩個倒F型天線為主；第三章是透過第二章節的結果中採用最差的擺放方式並以不改變天線的狀況下，利用接地面狹縫導致電流不會互相干擾而改善隔離度的方法；第四章則是延續第三章的擺放方式，使用另一種增加金屬片的方式去使隔離度有所提升。

The thesis is to discover the way to improve the Isolation between two dual-band Antennas. The antenna used the flat WLAN (Wireless Local Area Network) one, and the part of low frequency (2.4G ~ 2.5GHz) to design in the thesis. The sizes of antenna are under 40 x 8 mm2. The content includes three chapters to find out the better isolation. In the chapter two, it describes two usual PIFA antennas design with the least distance and analyzes the location of antennas to discover the best Isolation. The antennas mainly are two-upside-F shape.
In the chapter three, it discusses to use the worst antenna location without changing the design and put a narrow seam on the ground so it improves the isolation. Last chapter follows the chapter three and adds the metal strip to make better isolation.

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