A new method to calculate phase center locations for arbitrary antenna systems and scenarios
A new method to calculate phase center locations for arbitrary antenna systems and scenarios
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DOI：
10.1109/isemc.2016.7571729
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发表时间：
2016-07
期刊：
影响因子：
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通讯作者：
D. Harke;H. Garbe;Prashant Chakravarty
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文献类型：
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作者：
D. Harke;H. Garbe;Prashant Chakravarty
准确设置天线测量程序和保持雷达导航系统的良好性能是依赖于相位中心 (PC) 位置的精确知识的任务的两个示例。目前，当需要测试天线和被测设备 (EUT) 之间的精确距离时，特别是在 3 m 电磁兼容性 (EMC) 场发射测量中讨论这个问题。如果在电磁场景中，可以发现一个点的行为类似于发射球面波的各向同性辐射体，则该点称为 PC。由于许多寻找 PC 的方法容易受到各种限制，本文提出了一种能够处理任意系统的算法。评估多个远场坡印廷矢量的方向，以便回溯电磁能量似乎发出的位置。使用电磁学软件 FEKO 进行仿真，生成用于评估过程的输入数据。实现快速收敛和可重复、合理的结果。由于少量数据足以计算出可靠的 PC 位置，从而减少了所需的测量工作，确保了实际适用性。
Accurately setting up antenna measurement procedures and maintaining good performance of radar navigation systems are two examples of tasks relying on precise knowledge of the phase center (PC) location. Currently this problem is discussed particularly in 3 m-electromagnetic compatibility (EMC) field emission measurement, when an exact distance between test antenna and the equipment under test (EUT) is needed. If, in an electromagnetic scenario, a point can be found behaving like an isotropic radiator emitting spherical waves, this point is called the PC. Since many methods to find the PC are prone to various limitations, this paper proposes an algorithm able to handle discretionary systems. Directions of multiple far field Poynting vectors are evaluated in order to backtrack the location from where electromagnetic energy seems to emanate. Simulations with the electromagnetics software FEKO generate input data for the evaluation process. Fast convergence and repeatable, reasonable results are achieved. As a small amount of data is sufficient to calculate reliable PC locations and this reduces the required measurement effort, practical applicability is ensured.