隨著行動電話普及，電磁波危害的議題逐漸為大眾所注意。本論文於手機面板處置入第二個天線，希望將原本輻射至人體腦部之電磁波能量回收。由於設計前量測手機輻射訊號實驗可發現振幅過小，本論文於是設計transformer將天線所收到振幅放大，以利回收電路加以利用；最後提出利用天線交流訊號抬升直流準位的voltage multiplier 電路取代原有電路架構。為了使得transformer有較高放大倍率，本論文於製程上使用TSMC 0.18-μm CMOS 1P6M標準製程來加以實現，整體晶片面積為0.88X0.61mm^2。

As the mobile phone got more popular, people paid more attention to the issue of electromagnetic (EM) wave hazards. This thesis is committed to recycle the EM wave energy which radiates from the mobile phone to human brain by means of placing a second antenna at faceplate. Because the signal amplitude acquired from the antenna is too small to use for the subsequent circuit, a transformer was designed as the first stage to enlarge the signal amplitude. For charging a lithium ion battery with the recycled energy, a rectifier circuit and a charge pump circuit were implemented. Also, voltage multiplier circuits were proposed to uplift the DC quasi voltage by using antenna AC signal. To make sure of a high transition ratio of the transformer, the TSMC 0.18μm CMOS 1P6M standard process was utilized. The whole chip area is 0.88X0.61mm^2.

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