{"title":"Simultaneous Multifrequency Near-Field Radio Holography of Reflector Antennas","authors":"Xiaoling Zhang;Wei Liu;Yingxi Zuo;Yue Lan;Zheng Lou;Yuan Qian;Bingjie Chen","doi":"10.1109/TAP.2024.3418189","DOIUrl":null,"url":null,"abstract":"We propose a simultaneous multifrequency near-field radio holography method for measuring reflector surfaces of radio telescopes with high precision. With a comb spectrum generator as the beacon source, this method can obtain aperture phase maps at multiple frequencies simultaneously and thereby reduce the interference of multipath signals and improve the measurement precision of radio holography. The simulation and analysis of the multipath effect on antenna beam pattern measurement are presented. A simultaneous multifrequency near-field holography system operating at the W-band is built for experimental validation. Demonstrating experiment conducted on a 1.2-m aperture submillimeter antenna is reported and discussed.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"72 8","pages":"6242-6250"},"PeriodicalIF":4.6000,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Antennas and Propagation","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/10577584/","RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
We propose a simultaneous multifrequency near-field radio holography method for measuring reflector surfaces of radio telescopes with high precision. With a comb spectrum generator as the beacon source, this method can obtain aperture phase maps at multiple frequencies simultaneously and thereby reduce the interference of multipath signals and improve the measurement precision of radio holography. The simulation and analysis of the multipath effect on antenna beam pattern measurement are presented. A simultaneous multifrequency near-field holography system operating at the W-band is built for experimental validation. Demonstrating experiment conducted on a 1.2-m aperture submillimeter antenna is reported and discussed.
我们提出了一种同步多频近场射电全息法，用于高精度测量射电望远镜的反射面。该方法以梳状频谱发生器为信标源，可同时获得多个频率的孔径相位图，从而减少多径信号的干扰，提高射电全息的测量精度。本文介绍了多径效应对天线波束图形测量的模拟和分析。建立了一个在 W 波段同时运行的多频近场全息系统，用于实验验证。报告和讨论了在 1.2 米孔径亚毫米天线上进行的演示实验。
期刊介绍：
IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas, including design and development, and in the propagation of electromagnetic waves, including scattering, diffraction, and interaction with continuous media; and applications pertaining to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques
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