【摘要】：本文研究球面共形陣天線的特性。首先設計了一種雙層雙饋點圓極化微帶天線作為天線陣元;接著基于該微帶天線探討了陣中方向圖及平面相控陣掃描特性。為研究共形陣特性,文章對球面陣元耦合進行了仿真,并在此基礎上研究共形陣掃描特性。。為展寬頻帶,在單層貼片上增加寄生貼片得到雙層雙饋點圓極化微帶天線。該天線在頻帶內阻抗特性符合要求,增益達到了9.7dB。以該天線為陣元,借助HFSS得到方形陣和簇形陣的陣中方向圖,再對兩種平面陣列進行了掃描特性研究。結果表明相近陣元數目的簇形平面陣有更大的掃描范圍,方形陣在掃描俯仰角小于60o時已失去掃描能力。共形陣研究始于球面陣元耦合,文中探討了陣元間距對兩陣元端口S參數的影響。在此基礎上對比了等角度排布和等間距排布共形陣,在掃描范圍內等間距排布方式具有更穩(wěn)定的增益。
[Abstract]:The characteristics of spherical conformal array antenna are studied in this paper. Firstly, a double-layer doubly fed point circularly polarized microstrip antenna is designed as the antenna element, and then the scanning characteristics of the planar phased array and the plane phased array are discussed based on the microstrip antenna. In order to study the characteristics of conformal array, the coupling of spherical array elements is simulated, and the scanning characteristics of conformal array are studied. In order to widen the frequency band, a double-layer doubly fed point circularly polarized microstrip antenna is obtained by adding parasitic patch to a single-layer patch. The impedance characteristics of the antenna meet the requirements in the frequency band, and the gain is up to 9.7 dB. Taking the antenna as the element, the square and cluster array directions of the square array and the cluster array are obtained by means of HFSS, and the scanning characteristics of the two kinds of planar arrays are studied. The results show that the cluster plane array with similar number of elements has a larger scanning range, and the square array has lost the scanning ability when the scan pitch angle is less than 60 o. The study of conformal array begins with the coupling of spherical array elements. The effect of array element spacing on the S parameters of two array elements is discussed in this paper. On the basis of this, the conformal array with equal angle and equal spacing is compared, and the equal spacing arrangement has a more stable gain in the scanning range.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN822

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本文編號：2248589