本論文提出一單迴路多頻天線，目的為改善雙迴路loop天線，於應用時所造成的互感效應，並以手持式裝置之近場通訊(Near Field Communication, NFC)射頻天線，整合Qi無線充電線圈設計來當載具以便驗證單迴路多頻天線之效能。此架構之整體大小為68(L)x49(W) mm2。除了能夠用於13.56MHz之NFC系統讀卡器模式、卡片模式以及點對點模式三種功能，亦可切換為100kHz之Qi無線充電系統。
　　本論文所討論的Qi無線充電技術，即採用磁感應之方式，透過HFSS模擬，以及實作量測得知所設計之感應頻率正確性，也利用X-Ray螢光膜厚儀找出最小銅厚，達到降低製程成本。

In order to facilitate people who want having NFC and wireless charging functions together in the mobile, this paper presents a single-loop antenna. This antenna can switching each function more easily. Let mobile users more convenient.
　　The antenna size is 68 (L) x49 (W) mm2. This antenna not only can use the NFC system for 13.56MHz reader mode, the card mode and peer to peer mode but also can switch to 100kHz using the Qi wireless charging system.
　　The main reason to design this antenna is for solving the two loop antenna will occur mutual induction. With near field communication system, changing the line width and turns will increase the magnetic field energy intensity. With wireless charging antenna design, this thesis is according to Qi specification , using the HFSS simulation, measurement, X-Ray to find out the minimum copper thickness, to cost down it.

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