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Dual-Polarized Beam-Scanning Antenna using Parasitic Sub-Arrays

机译:使用寄生子阵列的双极化波束扫描天线

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The design, fabrication and characterization of a four-element linear array of dual-polarized parasitic sub-arrays (PSAs) is described in this paper. The sub-arrays are designed to operate in the X-band and they are fed by stacked microstrip patches. Comparable to the well known Yagi-Uda principle, the PSA employs parasitic coupled radiators to increase the directivity. A wire model has been developed for a very fast analysis of the sub-arrays during the antenna design. The desired angular fieid-of-view (FoV) of the linear array is ±15° and four PSAs, which cover this angular range, are used in the array. Algorithms for optimum beamforming are applied to the measurement results and a mean directivity of 17.5 dBi is achieved within the desired FoV. Subsequently two different schemes are used to calibrate the antenna array prior to a direction of arrival {DOA) estimation algorithm. The resulting DOA estimation error, with mean values between 0.06° and 0.154°, is then used to evaluate both calibration methods.
机译:本文描述了双极化寄生子阵列(PSA)的四元素线性阵列的设计,制造和特性。子阵列设计为在X波段工作,并由堆叠的微带贴片供电。与众所周知的八木-宇田(Yagi-Uda)原理相比,PSA采用寄生耦合辐射器来提高方向性。已经开发了线模型,用于在天线设计期间非常快速地分析子阵列。线性阵列的所需视场角(FoV)为±15°,阵列中使用了四个覆盖该角度范围的PSA。将用于最佳波束成形的算法应用于测量结果,并在所需的FoV范围内实现17.5 dBi的平均方向性。随后,在到达方向(DOA)估计算法之前,使用两种不同的方案来校准天线阵列。然后将所得的DOA估计误差(平均值介于0.06°和0.154°之间)用于评估这两种校准方法。

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