| 摘要: |
| 共形天线的安装和测量以及载体平台表面的变形和振动均会引起阵元位置误差，严重影响
共形天线的测向性能。通过设置４个方位未知的精确校正的辅助阵元，实现了共形天线大尺度三维
的阵元位置误差校正。给出了阵元位置误差条件下共形天线导向矢量的方位依赖的幅相误差等效
表示模型；基于子空间原理得到等效的方位依赖的幅相误差估计，进而得到共形天线阵元的三维位
置误差估计。该方法可以实现共形天线校正信源来波方位和阵元三维位置误差的联合但“去耦”估
计。计算机仿真结果验证了共形天线阵元位置误差校正的辅助阵元法的有效性 |
| 关键词: 共形天线 阵列校正 位置误差校正 辅助阵元法 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目（60601016）；陕西省自然科学基础
研究计划项目(2010JQ8003)；空军工程大学电讯工程学院研究生论文创新基金项目（200707
） |
|
| Array Shape Calibration for Conformal Antenna with Instrumental Sensors |
| HOU Qing-song,GUO Ying,WANG Bu-hong,TANG Xun |
| (The Telecommunication Engineering Institute, Air Force Engineering University,
Xi′an 710077, China) |
| Abstract: |
| Both of the installation and measurement of conformal antenna cause po
sition errors of its elements. And its supporting structure is also subjected to
deformation and vibration. As a consequence, the positions of its elements chan
ge. Its performance of direction finding is seriously affected. In this paper a
rray shape calibration algorithm for conformal array antenna is developed by usi
ng four
accurately calibrated instrumental sensors with unknown DOAs. The array steering
vector in the presence of position errors is expressed as angularly dependent g
ain and phase uncertainties. The angularly dependent gain and phase uncertaintie
s are estimated based on subspace direction finding technique. And then the 3D p
osition errors of the elements are calculated sequentially. The proposed calibra
tion method can estimate the DOAs of the auxiliary calibrating sources and the p
osition errors jointly. Computer simulation demonstrates that the proposed algor
ithm is effective. |
| Key words: conformal antenna array calibration array shape calibration instrumental sens
ors method |
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