在本論文主要是針對筆記型電腦的內藏式天線進行研究與設計，在產品接收與發射端的天線之特性，直接對通訊的優劣有著關鍵性的影響，因此在愈趨複雜的天線空間以及各種不同的特性需求下，如何研發出適合的天線設計，是產品最大的挑戰；在論文中提出一迴圈天線創新的設計架構外，並針對天線及其它參數的特性進行探討，此操作頻寬涵蓋了GSM(Global System for Mobile)四頻及UMTS(Universal Mobile Telecommunications System)系統的操作需求，可以應用於無線廣域網路(Wireless Wide Area Network，WWAN)系統的天線設計，相當符合多頻帶信號發射、接收的需求；此天線結構簡單、製作容易、可以很容易印刷在價格較低的微波介質基板上，可以有效降低成本，設計安裝於筆電內以提昇使用時訊號接收之可靠度。

論文中使用XFDTD的模擬軟體來分析並和測量的數據比較，在電壓柱波比(VSWR)小於3，低頻頻率900 MHz所量測到的印刷式迴圈天線頻寬大於136 MHz、天線增益約為2 dBi且效率範圍約在43~63%之間；高頻頻率1800 MHz所量測到的印刷式迴圈天線頻寬大於460 MHz、天線增益約為4 dBi且效率約在55~75%之間，將模擬和量測數據加以比較得到相當吻合的結果；故此天線具有良好頻寬、增益與輻射特性，將可滿足無線廣域網路GSM四頻及WCDMA頻帶的使用。

In thesis, we proceed to research for internal antenna inside notebook computer. Launch and receive the characteristic of the antenna in the products, having key point of the communication quality directly, so under antenna space and all kinds of performance request that become the more complicated, how to research and develop the suitable antenna design, one of the greatest challenge of the product; in the thesis provide new structure of the antenna, and carry on the discussion to the characteristic and other parameters of the antenna, this operation bandwidth is contain GSM (Global System for Mobile) Quad-Band and UMTS (Universal Mobile Telecommunications System) system request, antenna design for WWAN (Wireless Wide Area Network, WWAN) system application, accord with the demand that the signal of multi-band transmits and receives; antenna of simple structure, manufacture easy, can very easy to print at the PCB, can lower costs effectively, design and install in notebook computer can enhance signal receivers of reliability.
Use the simulation software of XFDTD to analyze and compare with data measured in the thesis, in the Voltage-Standing-Wave-Ratio (VSWR) smaller than 3, low-band frequency at 900 MHz in printing type loop antenna measured bandwidth greater than 136 MHz, gain about 2 dBi, efficiency about 43~63%, and high-band frequency at 1800 MHz in printing type loop antenna measured bandwidth greater than 460 MHz, gain about 4 dBi, efficiency about 55~75%, the simulation and measured results are very similar; So the antenna have better bandwidth, gain and radiating the performance, can satisfy the WWAN system use.

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