Indirect Holographic Techniques for Determining Antenna Radiation Characteristics and Imaging Aperture Fields
Indirect Holographic Techniques for Determining Antenna Radiation Characteristics and Imaging Aperture Fields
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DOI：
10.1109/map.2007.370982
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发表时间：
2007-06
影响因子：
3.5
通讯作者：
D. Smith;M. Leach;M. Elsdon;S. Foti
中科院分区：
文献类型：
--
作者：
D. Smith;M. Leach;M. Elsdon;S. Foti
间接全息技术提供了使用简单且廉价的近场强度图测量来确定微波天线的辐射特性以及重建复杂孔径场的潜力。这项工作描述了将间接全息技术应用于微波天线的实用方法。它描述了如何采用最初在光频率开发的技术来实现在微波天线上进行测量。主要区别在于用电子生成的参考信号代替了辐射参考信号。这使得以前的实际限制得以克服。其中包括大型碟形天线的计算机模拟和实际结果，其样本间距与直接全息技术中采用的样本间距相似。这项工作还描述了如何将样本间距显着减小到半波长以下，从而能够确定较小天线的辐射特性
Indirect holographic techniques offer the potential of using simple and inexpensive near-field intensity-pattern measurements for the determination of the radiation characteristics of microwave antennas, and for the reconstruction of complex aperture fields. This work describes a practical method of applying indirect holographic techniques to microwave antennas. It describes how a technique originally developed at optical frequencies can be adapted to enable measurements to be taken on microwave antennas. The major difference is the replacement of a radiated reference signal by an electronically generated reference signal. This has enabled previous practical limitations to be overcome. Computer simulations and practical results are included for a large dish antenna at a sample spacing similar to those employed in direct holographic techniques. This work also describes how reducing the sample spacing significantly below a half wavelength enables the radiation characteristics of smaller antennas to be determined