Holographic phase-retrieval method of near-field antenna pattern measurement for bolometer-array-equipped millimeter-wave telescopes
Holographic phase-retrieval method of near-field antenna pattern measurement for bolometer-array-equipped millimeter-wave telescopes
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测辐射热计阵列毫米波望远镜近场天线方向图测量的全息相位检索方法
DOI：
10.1117/1.jatis.9.2.028003
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Matsuda Frederick
中科院分区：
文献类型：
--
作者：
Nakano Ryo;Takakura Hayato;Sekimoto Yutaro;Inatani Junji;Sugimoto Masahiro;Oguri Shugo;Matsuda Frederick
为观测宇宙微波背景辐射，研制了带辐射热计探测阵列的宽视场毫米波望远镜。为了对这些望远镜进行实验室验证，一些研究证明了使用相敏探测器代替焦平面探测器阵列的几个代表性像素的近场天线测量。我们提出了一种全息相位恢复方法，使近场测量与热测量探测器阵列一样。我们在固定位置放置一个参考发射极，在望远镜孔径处扫描一个信号发射极。这两个发射器是锁相的，在焦平面上产生干涉图样（全息图），从中可以提取孔径场的振幅和相位。我们用一架视场为18度× 9度的十字形龙式望远镜实验证明了这种方法。在演示中，我们在焦平面上的三个检测器位置放置了一个相敏检测器。忽略直接测量的相位信息，从全息图中计算出的天线方向图与180 GHz−60 db水平下的强度和相位测量结果一致。应用该方法，理论上可以同时测量焦平面上所有测热探测器的天线方向图。
Wide field-of-view millimeter-wave telescopes with a bolometric detector array have been developed for cosmic microwave background radiation observations. For the purpose of laboratory verification of these telescopes, several studies have demonstrated near-field antenna measurements using a phase-sensitive detector that replaces a few representative pixels of the focal-plane detector array. We present a holographic phase-retrieval method that enables near-field measurements with the bolometric detector array as it is. We place a reference emitter at a fixed position and scan a signal emitter at the telescope aperture. These two emitters are phase-locked and generate interference patterns (holograms) on the focal plane, from which the amplitude and phase of the aperture field can be retrieved. We experimentally demonstrated this method with a crossed-Dragone telescope with a field-of-view that is 18 deg × 9 deg. In the demonstration, we placed a phase-sensitive detector at three detector positions on the focal plane. The antenna patterns calculated from the hologram, neglecting the directly measured phase information, were consistent with those calculated from both intensity and phase measurements at the −60-dB level at 180 GHz. Applying this method, the antenna patterns for all of the bolometric detectors on the focal plane can theoretically be measured simultaneously.
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莱特鸟
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
Nobu Katayama
通讯作者：
Nobu Katayama
1/4 比例 LiteBIRD 低频望远镜远旁瓣天线方向图测量
影响因子：
3.2
作者：
Takakura Hayato;Sekimoto Yutaro;Inatani Junji;Kashima Shingo;Imada Hiroaki;Hasebe Takashi;Kaga Toru;Takeda Yoichi;Okada Norio
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Okada Norio
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DOI：
10.1117/12.857423
发表时间：
2010
期刊：
--
影响因子：
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作者：
H. Tran;Brad L. Johnson;M. Dragovan;J. Bock;A. Aljabri;A. Amblard;D. Bauman;M. Betoule;T. Chui;L. Colombo;A. Cooray;D. Crumb;P. Day;C. Dickenson;D. Dowell;S. Golwala;K. Gorski;S. Hanany;W. Holmes;K. Irwin;B. Keating;C. Kuo;Adrian T. Lee;A. Lange;C. Lawrence;S. Meyer;N. Miller;Hien Nguyen;E. Pierpaoli;N. Ponthieu;J. Puget;J. Raab;P. Richards;C. Satter;M. Seiffert;M. Shimon;B. Williams;J. Zmuidzinas
通讯作者：
J. Zmuidzinas
CMB B模偏振卫星LiteBIRD低频望远镜概念设计
DOI：
10.1117/12.2561841
发表时间：
2020
期刊：
Proceedings of SPIE
影响因子：
--
作者：
Sekimoto Yutaro;et al.
通讯作者：
et al.
LiteBIRD 卫星任务的探测器制造开发
DOI：
10.1117/12.2562978
发表时间：
2020
期刊：
The Review of scientific instruments
影响因子：
--
作者：
B. Westbrook;C. Raum;S. Beckman;Adrian T. Lee;Nicole Farias;T. Sasse;A. Suzuki;Elijah Kane;Elijah Kane;J. Austermann;J. Beall;S. Duff;J. Hubmayr;G. Hilton;J. Lanen;M. Vissers;M. Link;N. Halverson;G. Jaehnig;Tommasso Ghinga;S. Stever;Y. Minami;K. Thompson;Megan B. Russell;K. Arnold;J. Seibert;M. Silva
通讯作者：
M. Silva