線元天線陣列波束掃描研究
The study of beam scanning for linear element flanar antenna array
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摘要: 由電磁場理論給出了平面線元天線陣列輻射的瞬態(tài)電磁脈沖沿徑向坡印亭矢量時間積分的解析解及數(shù)值解結果,并利用物理光學理論對所得結果作了對比分析,得到結論:(1)線元天線陣列輻射問題可以簡潔地由光柵方程求解;(2)被約束波束的坡印亭矢量時間積分的最大值與陣元數(shù)目的平方成正比;(3)保持同一列輻射器元饋電同步,而沿行方向依次作適當饋電時間延遲,可有效將波束控制在預期的很小角域內(nèi);(4)保持掃描的半角寬度,線元天線陣列有確定的波束掃描角范圍。Abstract: Based on electromagnetic theory, the analytical and numerical results of radial energy of linear element planar antenna array excited by electromagnetic pulse are offered at first, then, by analyzing the results with the interference and the diffraction theories, following conclusions are got: (1) The electromagnetic radiation problem of plane linear element planar antenna array can be solved by grating equation concisely. (2) The maximum energy of bounded beam is proportional to the square of the number of element of antenna array. (3) Keeping the same line elements of antenna array feeding at the same time while each row successive postpone properly, the beam can be restrained within the expected area. (4) The effective scanning angle range depends on the given half angle width.
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阮成禮,萬長華,電磁導彈的波形條件,科學通報,1990,36(10),738-741.[2]謝興盛,袁心平,張濤,大學物理教程,成都,電子科技大學出版社,1997.11,167-168.[3]J.M. Myers, T. T. Wu, Electromagnetic missiles from currents on fractal sets, Proc.[J]. SPIE.1990,1226:314-[4]R.W. Ziolkowski, Localized transmission of electromagnetic energy, Phys. Rev. A, 1989, 39(4),2005-2033.[5]H.F. Harmuth, Radar equation for nonsinusiodal waves, IEEE Trans. on EMC 1989, 31,138-147. -
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