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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/82347

    Title: 利用步階阻抗諧振器結構之毫米波圓極化天線陣列設計;Design of Millimeter-Wave Circularly-Polarized Antenna Array Using Stepped-Impedance Resonator Structure
    Authors: 丘增杰
    Contributors: 國立中央大學電機工程學系
    Keywords: 天線陣列;圓極化天線;毫米波天線;Antenna array;circularly-polarized antenna;millimeter-wave antenna
    Date: 2020-01-13
    Issue Date: 2020-01-13 14:46:46 (UTC+8)
    Publisher: 科技部
    Abstract: 在本計畫中,預計將以一年的時程,設計一個操作頻率28 GH由5個圓極化天線所組成之串聯式天線陣列。在網格天線(grid antenna)工作原理的基礎下,預計將兩個互相垂直的網格元素(element)藉由耦合方式,完成圓極化的輻射,此想法在本計劃的先期模擬結果中,顯示其具有可行性。陣列元素間間隔一波導波長,使每個幅射元件可同相輻射,且可降低傳輸線造成的輻射影響,並設計在尾端使用單埠天線輻射電阻(radiation resistance)取代行匹配電阻,不使用實際電阻,達成較高效率。在進一歩的計劃執行中,將利用步階阻抗諧振腔(Stepped-Impedance Resonator,SIR)來取代原網格元素,以達成增加阻抗頻寛的目的。此外,為了加強軸比(axial ratio)頻寛,在陣列的佈局上,將考慮採用文獻[12]的技術。預計其最大增益>15dBic,極化差>15dB,阻抗頻寬>3%,3dB軸比頻寬(axial ratio)>3%。天線陣列的設計結果將採用國研院國家晶片中心的PCB製程來實現,並加以量測以驗証設計的正確性。 ;In the project, a 28-GHz circularly-polarized grid antenna array with 5 elements will be designed and manufactured. The element is composed of two mutually orthogonal strip resonators and a coupling structure. While two resonators provide two radiation fields which are orthogonal to each other, the coupling structure provides the required 90-degree phase difference resulting in the circularly-polarized radiation. Preliminary has been conducted, and the simulated results shows the high feasibility of the project. In the further part of the project, stepped-impedance resonator will be applied to replace the strip resonator to achieve impedance bandwidth enhancement. Also, the technique reported in [12] will be adopted in the array deployment to obtain wider axial-ratio bandwidth. The expected specifications of the proposed design are as follows: peak gain > 15dBic, (left-hand cpl)/(right-hand cpl) > 15dB, impedance bandwidth > 3%, and axial ratio bandwidth > 3%. The proposed antenna array will be realized and measured by using CIC facility for design validation.
    Relation: 財團法人國家實驗研究院科技政策研究與資訊中心
    Appears in Collections:[電機工程學系] 研究計畫

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