本論文的研究動機是針對現今流行的滑蓋式行動電話研究其天線設計和經由天線輻射出的電磁波能量在不同的天線設計之下是否會影響其天線效率和對人體的影響。 本論文的量測方法採用三度空間天線輻射量測系統，這個方法能真實的量測出天線在三度空間中的峰值增益和平均增益。量測項目包含天線自由空間量測和天線靠近假人頭右耳量測，最後將量測數據加以分析和討論不同天線之間的優缺點。 本論文研究的主旨是研究一種最適合3G雙模滑蓋式行動電話的天線設計，使其天線效率滿足自由空間使用和靠近人頭使用的雙重要求。除此之外，並降低其電磁波對人體的危害。 In the chapter I of the thesis is to introduce the evolution of the mobile device, including the shape and the functions. In the chapter II, we discuss the protocol of the mobile device, OTA testing system, and SAR to the human. In the chapter III, I design the grounding system and antenna for the mobile device. Finally, I measured the antenna via the OTA system to compare the test data and studied the advantage and disadvantage under Free Space and the Phantom Head. This thesis is aimed at the most suitable antenna and the grounding design for the 3G dual mode sliding mobile device. Our solution can work fine under free space and the phantom head（Talking Position）. The SAR value is lower and acceptable.
