爲因應未來無線通訊系統之需求，手機乃趨向輕、薄、短、小的設計，因此天線的尺寸將成為考量的重點之一，其輻射效能亦直接影響到收訊效果和通話品質。故本論文提出一款微型化GPS晶片天線來內建於一般手機、PDA、以及智慧型手機，以作為接收GPS衛星訊號，其中乃應用HFSS套裝電磁模擬軟體，來設計建構天線原型，並探討天線置於測試板不同位子之效能變化。另外，本論文亦提出一款多頻帶單極天線，藉以滿足更多的無線存取功能。此天線涵蓋了GSM、DCS、PCS、UMTS、Bluetooth、WLAN、WiMax、Hyper LAN、WWAN、WiFi等常用的系統頻段，其利用兩條背板金屬帶線來增加共振頻率，並有效調整天線之輸入阻抗，以獲得更佳之輻射效能。

For future communication systems, to simultaneously meet various requirements such as low profile, compact size, light weight and easy fabrication, the dimension consideration of antenna design is a very critical part. The radiation performance of the antenna also directly affects the received signal and communication quality. Therefore this thesis proposes a miniature GPS antenna to be built in the mobile phone, PDA and smart phone for obtaining the satellite signals. A commercial EM solver, HFSS has been utilized to design prototype and investigate the performance variation for antenna located at different positions in the test board. Moreover, a multi-band monopole antenna is also presented to integrate more wireless access functions. The operating band of the proposed antenna is composed of GSM, DCS, PCS, UMTS, Bluetooth, WLAN、WiMax, Hyper LAN, WWAN and WiFi. As to achieve a better radiation performance, the antenna also employs two back-strips to enhance more resonant frequencies and flexibly adjust input impedance in this study.

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