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天線工程報告 南台科技大學 電子工程系 學號：M9730226 學生：鄭偉廷 1 IEEE Xplore Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array Reza Bayderkhani and Hamid Reza Hassani ISSN : 0018-926X Digital Object Identifier : 10.1109/TAP.2010.2078437 Date of Publication : 23 九月 2010 Sponsored by : IEEE Antennas and Propagation Society 2 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 一個組合插槽和串聯天線陣列引入導致天線 陣列寬頻寬，低旁瓣準位 (SLL)，高前端至 後端的比例(F/B)。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 簡介 印刷式陣列天線通常用在通訊系統，如 點對點或點對多點的微波雷達和毫米系統。 具有許多吸引人的特點，例如：體積小、重 量輕、成本低、易於製造。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 天線設計和結構 此結構主要的目的是要設計一個低SLL， 寬頻寬串聯印刷陣列天線。所以，先設計一 個傳統的串聯微帶陣列天線作為參考天線。 為了達到低SLL及阻抗寬頻的要求，在 此引用一些修改過可以被執行的天線。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 微帶串聯陣列天線(參考天線) 選用corner-fed，是因為它們提供高輸入 阻抗，因此非常適合用於串聯陣列上。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 雙向串聯印刷陣列天線 (a)寬大的插槽設在地面上 (b)側視圖 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 單向串聯印刷天線陣列在地面上的插槽 利用反射， 在基板上面 印著輻射元 素，變成單 向的。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 結果與討論 在本文中，詳細模擬和實驗結果，提出建議天 線。第一部分，傳統的線性微帶串聯陣列天 線〈參考天線〉，進行研究。第二部分，對 雙向寬帶串聯印刷陣列天線的大槽在地面上， 進行分析。最後，一個單向寬帶串聯印刷陣 列天線使用數組在地面上，正在調查。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 對參考天線進行了研究。 左圖顯示了模擬以及實測天線的反射係數。 右圖顯示了模擬與測量天線陣列的E和H面。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 對雙向串聯印刷陣列天線進行分析 左圖顯示了模擬與測量天線的反射係數。 右圖顯示了模擬與測量天線陣列的E和H面。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 對雙向串聯印刷陣列天線進行分析，改變插 槽寬度對反射係數的影響。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 電流分布的反射面 (a)雙向串聯陣列天線的寬大插槽 (b)數組單向串聯陣列天線的插槽 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 對單向串聯印刷陣列天線進行分析 左圖顯示了模擬與測量天線的反射係數。 右圖顯示了模擬與測量天線陣列的E和H面。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 對單向串聯印刷陣列天線進行分析，測量H 面輻射場型在三種不同的頻率寬帶。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 單向串聯印刷陣列天線的反向係數，因各種 插槽長度Lsa不同而有所變化。 Lsa 12 (mm) 13 14 One large slot SLL (dB ) -31.6 -32.5 -32.8 -33.1 Gain (dBi ) 18.1 18.45 18.65 18.8 F/B (dB ) 49 40 33 24 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 單向串聯印刷陣列天線的反向係數，因各種 反射間距不同而有所變化。 g(mm) 1 1.5 2 3.5 4.5 -29.7 -27.9 -27.1 SLL (dB ) -29.5 -32.5 Gain (dBi ) 18.2 18.45 18.5 18.65 18.9 F/B (dB ) 45 43 37 40 33 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 模擬和實測兩項不同的天線，單向和雙向天 線的不同頻率。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array 概述三 種天線 結構 Antenna Parameter Reference antenna Bi-directional Antenna Uni-directional antenna SLL (dB) -24 -33.2 -32.5 Average SLL (dB) < -33 < -35 < -48 Impedance Bandwidth (GHz) 15.95 – 16.5 11.3 – 23 10.3 – 23.1 Radiation Bandwidth (GHz) 16 – 16.5 14.5 – 17 14.5 – 17 Bandwidth, SLL≤-20 dB (GHz) 16.15 – 16.35 15.5 – 16.4 15.4 – 16.45 F/B (dB) 23 Gain (dBi) 18.95 15.9 18.45 HPBW (degree) 4.9 5.8 4.5 Efficiency (%) 93.86 90.3 88.5 Cross polarization level (dB) off broadside < -25 < -34 < -34 40 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 結論 一個簡單的方法已經被提出，透過微帶串聯 陣列天線將一個簡單的插槽置於地面上，同 時增加阻抗頻寬，降低SLL，增加F / B。 該天線結構是平面配置，易於設計和製造， 印刷陣列天線可進行線性和平面(linear and planar)。 該方法將插槽放置於地面上，結果微帶串聯 陣列天線是一個非常低的cross-polarization。 Reza Bayderkhani and Hamid Reza Hassani , ” Wideband and Low Sidelobe Slot Antenna Fed by Series-fed Printed Array” ,IEEE Transactions on Antennas and Propagation, September 2010 心得 在日常生活中，天線是不可或缺的產品構造 之一，例如手機、計程車無線電等，都是隨 處可見的。相對在使用上，竟可能以體積小 和重量輕為主，以消費者角度，便宜也是關 鍵。所以在製造天線的考量上，需具備輕、 薄、短小、成本低，才能滿足大眾的需求。