本論文主要設計適用於行動通訊裝置DVB/GSM/Wi-Fi三頻段的整合小型化槽孔式天線，此天線的面積為114 mm × 60 mm，製作於FR4基板，其厚度與相對介電常數分別為0.8 mm與4.4。天線主要分為U型主體天線與槽孔邊長金屬部份來實現多頻段的整合，其中U型主體天線主要是設計GSM 900/1800與Wi-Fi的共振頻段，而槽孔外圈邊長部份則為DVB共振頻段。由實驗與模擬結果得知，本文所設計之天線於470-960 MHz、 1450-1880 MHz、2.4-2.6 GHz等頻段皆有良好的阻抗匹配。另外，本文使用彎折方式以有效地降低共振頻率，在天線仍有良好接收或發射的特性之下，可縮減天線體積；並推導天線等效電路，希望直接藉由天線等效電路分析，即可設計及預估天線共振頻率與反射損耗的特性。

This thesis mainly focuses on designing a coplanar waveguide fed slot antenna for multiband operation covering the digital video broadcasting (DVB) signal reception in the UHF band (470–862 MHz), mobile communications in the GSM band (890–960 and 1710–1880 MHz), and the 2.4 GHz 802.11g/n band. The size of the designed antenna is 114 mm x 60 mm, and is printed on an FR4 substrate of thickness 0.8 mm with dielectric constant 4.4. It has an inner inverted-U strip enclosed by an outer loop strip. By employing these structures, the proposed antenna can yield three different desired bands while maintaining small size. The outer loop strip is designed to obtain a wide operating bandwidth (470–960 MHz), while the inverted-U strip is designed to cover the GSM and 2.4 GHz 802.11g/n frequency bands. Experimental and simulation results show the proposed antenna exhibits a good impedance matching over a wide frequency range of 470 MHz to 960 MHz, 1450 MHz to 1880 MHz, and 2.4 GHz to 2.6 GHz。Moreover, the equivalent circuits of the designed antenna are derived to study and predict the characteristics of resonant frequency and return loss.

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