A high precision holographic phaseless near-field method
A high precision holographic phaseless near-field method
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发表时间：
2013-04
期刊：
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通讯作者：
L. Zhiping;Wang Zhengpeng;W. Jianhua
中科院分区：
文献类型：
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作者：
L. Zhiping;Wang Zhengpeng;W. Jianhua
提出了一种新的全息近场无相方法。测量系统由幅值扫描测量系统、全息重构算法、被测天线（AUT）和参考天线组成。利用幅值扫描系统测量AUT与参考天线的干扰幅值。通过计算机重建被测天线的复近场，将被测干涉场与虚拟球面参考波进行乘法校正，然后在傅里叶变换域（如平面波角谱）或反投影图像空间进行滤波。重建方法不需要传统的菲涅耳近似，具有严格性。这种新型全息无相测量方法可用于平面近场测量等多种应用。实测和模拟结果验证了该方法的有效性。
A novel holographic near-field phaseless method is presented. The measurement system is composed of the amplitude scanning measurement system, the holographic reconstructed algorithm, the antenna under test (AUT) and the reference antenna. The interference amplitude of the AUT with the reference antenna is measured by the amplitude scanning system. The complex near field of the antenna under test is reconstructed by computer, where the measured interference field is corrected by the multiplication with the virtual spherical reference wave and then filtered in Fourier Transformation domain (e.g. Plane Wave Angular Spectrum) or the back-projected image space. The reconstruction method is rigorous without traditional Fresnel Approximation. The novel holographic phaseless measurement method can be used in many applications as for planar near field measurements for example. Measured and simulated results are presented to demonstrate the complex field retrieval method.