毫米波和亚毫米波反射天线近场相位恢复测量条件

Y. D. Cheung, G. Junkin, A. Anderson
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引用次数: 1

摘要

研究了一种双强度近场相位恢复算法的性能。除了前面提到的相位恢复的优点外,计算机模拟表明,当探头在非完美平面上扫描时,该算法对反射面天线的远场预测精度可能优于传统的近场测量。引入了“相位编码功率”的概念,并通过仿真推导了算法收敛所需的扫描距离。通过对32GHz偏置反射器的测量,验证了近场相位反演的有效性。结果说明了该方法在毫米波和亚毫米波范围内的实用性和应用能力。
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Conditions for Near-Field Phase Retrieval Measurements of Reflector Antennas in the MM and Sub-MM Wave Ranges
The performance of a double-intensity near-field phase retrieval algorithm is investigated. In addition to previously noted advantages of phase retrieval, it is shown from computer simulation that the accuracy of far-field prediction of a reflector antenna by the algorithm may be better than the conventional near-field measurement when the probe is scanned on a non-perfect planar surface. The concept of 'phase encoding power' is introduced from which the scan distances for the algorithm to converge satisfactorily are derived by simulation. Near-field phase retrieval is validated by measurement of an offset reflector at 32GHz. The result illustrates the practicability and capability for application in the mm and sub-mm wave ranges.
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