基于多層柔性介質的Ka波段縫隙天線設計
發(fā)布時間：2018-11-15 14:17
【摘要】：隨著微波技術的不斷發(fā)展,天線及其饋電網(wǎng)絡作為雷達以及通信系統(tǒng)的關鍵部分之一,一直受到研究人員的重點關注。在陣列天線饋電網(wǎng)絡的設計中,功率分配器(下面簡稱功分器)的功率與相位平衡度決定所對應天線能量的多寡,進而影響天線增益,是天線饋電網(wǎng)絡中一個不可忽視的重要環(huán)節(jié)。本文在學習基片集成波導技術的基礎之上,以縫隙天線為主要研究方向,研究并設計了縫隙天線陣列中的功率分配網(wǎng)絡,并在其后陣列天線低副瓣設計過程中加入了微帶天線陣列的對比研究,具體工作包含以下幾個方面:(1)對基片集成波導(Substrate Integrated Waveguide,簡稱SIW)平面陣列天線以及平面貼片陣列天線進行了研究與設計。首先設計了一個以Rogers5880為板材,基于SIW的雙層十六路三角分布功分器。仿真結果顯示,功分器在33.5GHz至35.7GHz通帶內(nèi)S11小于-15d B,帶內(nèi)各端口損耗小于0.4d B,其余各端口的S參數(shù)曲線吻合良好,相鄰端口相位相差180°,輸出功率符合三角分布;然后在十六路功分器的基礎上,設計了一個8×8平面縫隙陣列天線,仿真結果顯示,天線在35GHz有良好的回波損耗,增益可達20d B,其副瓣電平在E面可達-28d B。(2)為了加深對低副瓣天線的設計理解,針對12單元的多邊形陣列天線,設計了一個以Rogers3850為板材的12路微帶功分器。該功分器在34GHz至36GHz通帶內(nèi)S11小于-20d B,仿真結果顯示,天線在34.3GHz至35.75GHz通帶內(nèi),回波損耗小于-10d B,增益可達20d B,副瓣電平在E面和H面可達-26d B。(3)基于以上兩種平面陣列天線進行了柱面共形的研究和設計。文章將兩種天線在半徑150mm的圓柱體上進行共形,并進行了仿真。由仿真結果可以看出,天線在共形之后,二者S11均受到影響,產(chǎn)生一定的頻率偏移。相比較而言,微帶天線所受的影響比較小。在方向圖方面,縫隙天線的副瓣電平有明顯的增大趨勢,而微帶天線則表現(xiàn)為波瓣寬度增加,而且隨著柱面曲率半徑的增大,天線輻射特性呈向全向天線過渡的趨勢。
[Abstract]:With the development of microwave technology, antenna and its feed network, as one of the key parts of radar and communication system, have been paid more and more attention by researchers. In the design of the antenna array feed network, the power and phase balance of the power divider (hereinafter referred to as the power divider) determines the energy of the corresponding antenna, and then affects the antenna gain. It is an important link in antenna feed network. Based on the study of substrate integrated waveguide technology and the research direction of slot antenna, the power distribution network in slot antenna array is studied and designed in this paper. A comparative study of the microstrip antenna array is introduced in the design of the low sidelobe of the rear array antenna. The specific work includes the following aspects: (1) the substrate integrated waveguide (Substrate Integrated Waveguide, SIW) Planar Array Antenna and Planar Patch Array Antenna are studied and designed. Firstly, a 16-way double-layer triangular power divider based on Rogers5880 and SIW is designed. The simulation results show that the S11 is less than -15 dB in the 33.5GHz to 35.7GHz passband, and the loss of each port in the band is less than 0.4 dB. The S-parameter curves of the other ports are in good agreement with each other, and the phase difference between the adjacent ports is 180 擄. The output power conforms to the triangular distribution; Then an 8 脳 8 planar slot array antenna is designed on the basis of 16 power dividers. The simulation results show that the antenna has good echo loss in 35GHz, and the gain can reach 20 dB. The sidelobe level can reach -28 dB on the E plane. (2) in order to better understand the design of low sidelobe antenna, a 12-channel microstrip power divider with Rogers3850 as the plate is designed for the polygonal array antenna with 12 elements. The power divider is less than -20dB in the 34GHz to 36GHz passband. The simulation results show that in the 34.3GHz to 35.75GHz passband, the echo loss is less than -10dB, and the gain can reach 20dB. The sidelobe level can reach -26dB on the E and H planes. (3) the cylindrical conformal design is carried out based on the above two planar array antennas. In this paper, two antennas are conformed on a cylinder with radius 150mm and simulated. From the simulation results, it can be seen that after the antenna is conformal, both S11 and S11 are affected, resulting in a certain frequency offset. By comparison, the microstrip antenna is less affected. In the aspect of pattern, the sidelobe level of slot antenna increases obviously, while the width of microstrip antenna increases, and with the increase of radius of curvature of cylinder, the radiation characteristic of slot antenna tends to the omnidirectional antenna.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN823.24
本文編號：2333539
[Abstract]:With the development of microwave technology, antenna and its feed network, as one of the key parts of radar and communication system, have been paid more and more attention by researchers. In the design of the antenna array feed network, the power and phase balance of the power divider (hereinafter referred to as the power divider) determines the energy of the corresponding antenna, and then affects the antenna gain. It is an important link in antenna feed network. Based on the study of substrate integrated waveguide technology and the research direction of slot antenna, the power distribution network in slot antenna array is studied and designed in this paper. A comparative study of the microstrip antenna array is introduced in the design of the low sidelobe of the rear array antenna. The specific work includes the following aspects: (1) the substrate integrated waveguide (Substrate Integrated Waveguide, SIW) Planar Array Antenna and Planar Patch Array Antenna are studied and designed. Firstly, a 16-way double-layer triangular power divider based on Rogers5880 and SIW is designed. The simulation results show that the S11 is less than -15 dB in the 33.5GHz to 35.7GHz passband, and the loss of each port in the band is less than 0.4 dB. The S-parameter curves of the other ports are in good agreement with each other, and the phase difference between the adjacent ports is 180 擄. The output power conforms to the triangular distribution; Then an 8 脳 8 planar slot array antenna is designed on the basis of 16 power dividers. The simulation results show that the antenna has good echo loss in 35GHz, and the gain can reach 20 dB. The sidelobe level can reach -28 dB on the E plane. (2) in order to better understand the design of low sidelobe antenna, a 12-channel microstrip power divider with Rogers3850 as the plate is designed for the polygonal array antenna with 12 elements. The power divider is less than -20dB in the 34GHz to 36GHz passband. The simulation results show that in the 34.3GHz to 35.75GHz passband, the echo loss is less than -10dB, and the gain can reach 20dB. The sidelobe level can reach -26dB on the E and H planes. (3) the cylindrical conformal design is carried out based on the above two planar array antennas. In this paper, two antennas are conformed on a cylinder with radius 150mm and simulated. From the simulation results, it can be seen that after the antenna is conformal, both S11 and S11 are affected, resulting in a certain frequency offset. By comparison, the microstrip antenna is less affected. In the aspect of pattern, the sidelobe level of slot antenna increases obviously, while the width of microstrip antenna increases, and with the increase of radius of curvature of cylinder, the radiation characteristic of slot antenna tends to the omnidirectional antenna.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN823.24
【共引文獻】
相關期刊論文 前2條
1 錢青;洪玲偉;;C波段寬帶雙線極化微帶天線的設計[J];硅谷;2012年04期
2 梁斌;楊娜;;一種新型高增益微帶天線[J];數(shù)字通信;2009年05期
相關碩士學位論文 前10條
1 齊會穎;微帶共形天線陣的方向圖綜合與實驗研究[D];國防科學技術大學;2010年
2 錢青;寬帶雙極化微帶天線的研究與設計[D];杭州電子科技大學;2012年
3 英正慶;集成天線的射頻功率放大器的研究[D];浙江大學;2003年
4 劉寶宏;微帶天線的分析和寬頻帶設計[D];南京理工大學;2002年
5 曾志純;移動計算機網(wǎng)絡中的雙向功放與天線技術研究[D];武漢理工大學;2004年
6 李龍;小型寬帶微帶天線設計[D];南京理工大學;2004年
7 王艷麗;寬帶微帶天線設計與仿真技術研究[D];哈爾濱工程大學;2004年
8 姚平;高增益及低副瓣平面陣列微帶天線研制[D];南京理工大學;2005年
9 韓玲;基于無線數(shù)據(jù)傳輸系統(tǒng)微帶貼片天線與功率放大器的設計研究[D];中北大學;2006年
10 李南;基于時域有限差分法的集成天線設計[D];合肥工業(yè)大學;2007年
，本文編號：2333539
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