一种低剖面宽带天线阵设计
Design of A Low Profile Wide-band Antenna Array
  
DOI:
中文关键词:  宽带阵列,印刷偶极子,低剖面,互耦,相控阵
英文关键词:wide-band array, printed dipole, low profile, coupling, phased array
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作者单位
张则伟, 陈伶璐, 杨咏明 中国电子科技集团公司第三十六研究所,嘉兴314033 
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中文摘要:
      以印刷偶极子天线为阵元,令功分网络与阵元垂直交互放置,以降低阵列剖面高度,并结合紧耦合阵列思想,优化天线参数,最终实现L 频段(0. 8 ~2 GHz)8×8 低剖面宽带阵列天线的设计。单列1×8 天线子阵,阵元依E 面排列,阵元间距设计为100 mm,可通过1 个一分八功分器合成输出。扩展为8×8 规模阵列,列间距设计为84mm,可满足全频段(0. 8 ~2 GHz)水平面±45 o范围的扫描需求。仿真结果显示,该8×8 阵列在水平面±45 o扫描时,最大有源驻波小于2. 5,阵列法向增益大于16. 2 dBi。该阵列尺寸为648 mm×800 mm×64 mm,阵列口径效率优于90%。加工制作了单列1×8 天线子阵,子阵尺寸为70 mm×800 mm×64 mm。测试结果与仿真数据吻合,测试结果显示,该天线子阵在0. 8 ~2 GHz 频段内驻波小于2. 5,增益优于10 dBi。
英文摘要:
      In this paper, an 8×8 wide-band array with low profile is designed, which works in L band (0. 8-2GHz). Printed dipole antenna is used as its element. The low profile of this array can be obtained by the vertical interposition of the antennas and the power distribution network. The principle of tightly coupled array is employed to optimize antenna parameters. A sub-array contains 1 ×8 elements, arranged along with E plane. The distance of each element in sub-array is 100mm. Each sub-array is output by a one into eight power divider. The distance of each sub-array in 8×8 array is 84mm, meeting the requirement of scanning ±45 oin horizontal plane at the whole frequency band (0. 8-2GHz). The simulation results show the maximum active VSWR is less than 2. 5 and the array normal gain is more than 16. 2dBi, and this 8×8 array scans ±45 oin horizontal plane. The size of this array is 648mm×800mm×64mm, and the array aperture efficiency is more than 90%. A 1×8 sub-array is realized. The size of this sub- array is 70mm×800mm×64mm. The measured results agree with the simulation results. The measured results show the VSWR of this sub-array is less than 2. 5, and the gain is more than 10dBi within 0. 8-2GHz band.
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