摘要

　　本論文主要為探討及設計製作應用在WiMAX無線通訊系統中戶外型固定式用戶端設備之點對點陣列天線。主要內容包含不同類型平面陣列天線（三維微帶線饋入之平面微帶陣列天線、H形槽孔耦合饋入之平面微帶陣列天線及印刷式偶極陣列天線）之模擬與討論、2 x 2、2 x 3平面微帶陣列天線的設計、模擬與實際量測。其中提出2 x 3平面微帶陣列天線的構想是為了提升天線的阻抗頻寬、增益及降低旁波束位準，文中也針對影響旁波束位準的因素做一些討論。實作結果為：2 x 2陣列的阻抗頻寬為160 MHz （3.35 GHz～3.51 GHz，VSWR < 1.5，4.6 ％，中心頻率以3.5 GHz定義），增益為14.56 dBi，旁波束位準為 -14.69 dB；2 x 3陣列的阻抗頻寬為620 MHz （3.14 GHz～3.76 GHz，VSWR < 1.5，17.7 ％），增益為16.23 dBi，旁波束位準為 -18.83 dB。因此，2 x 3陣列比2 x 2陣列有更佳的電氣特性且能完全符合WiMAX無線通訊系統規格的需求。

Abstract

　　The main objective of this study is to discuss and implement PTP (Point-to-Point) array antennas applied to fixed outdoor CPE (Customer Premises Equipment) of WiMAX Wireless Communication System. The main studies include simulation and discussion of different kinds of planar array antennas (three-dimensional microstrip transition fed planar microstrip array antenna, H-shape aperture-coupled planar microstrip array antenna and printed dipole array antenna), design, simulation and practical measurement of 2 x 2, 2 x 3 planar microstrip array antennas. In order to enhance impedance bandwidth, gain and reduce the SLL (Sidelobe Level) of antenna, we propose the design of 2 x 3 planar microstrip array antennas. The measurement results are shown that: the 2 x 2 array has 160 MHz impedance bandwidth (3.35 GHz~3.51 GHz, VSWR < 1.5, 4.6 % centered at 3.5 GHz) , the gain is 14.56 dBi, the SLL is -14.69 dB; the 2 x 3 array has 620 MHz impedance bandwidth (3.14 GHz~3.76 GHz, VSWR < 1.5, 17.7 %) , the gain is 16.23 dBi, the SLL is -18.83 dB. According to these results, 2 x 3 array antenna shows much promising electrical properties and fully meet the requirement of WiMAX wireless communication system standards in comparison with 2 x 2 array antenna.

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