Far-Sidelobe Antenna Pattern Measurement of LiteBIRD Low Frequency Telescope in 1/4 Scale
Far-Sidelobe Antenna Pattern Measurement of LiteBIRD Low Frequency Telescope in 1/4 Scale
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1/4 比例 LiteBIRD 低频望远镜远旁瓣天线方向图测量
DOI：
10.1109/tthz.2019.2937497
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发表时间：
2019
影响因子：
3.2
通讯作者：
Okada Norio
中科院分区：
文献类型：
--
作者：
Takakura Hayato;Sekimoto Yutaro;Inatani Junji;Kashima Shingo;Imada Hiroaki;Hasebe Takashi;Kaga Toru;Takeda Yoichi;Okada Norio
宇宙微波背景辐射（CMB）的偏振对暴胀宇宙有着至关重要的信息。为了检测这些信号，有必要抑制望远镜的远旁瓣，远旁瓣会用强烈的前景辐射（如银河平面）污染CMB信号。LiteBIRD是2020年代唯一获得资助的CMB观测卫星，低频望远镜（LFT; 34-161 GHz）是其望远镜之一。我们使用其1/4比例模型测量了LFT的近场天线方向图，并检查了距离峰值高达60°的远旁瓣。为了覆盖LFT的20°视场，我们研究了焦平面边缘和中心的天线方向图。测量频率为140-220 GHz，对应于全尺寸LFT的最低频段（35-55 GHz）。测量结果与模拟的远旁瓣方向图至少在-50 dB水平上一致，并且表明两个正交极化方向的远旁瓣在-40 dB水平下彼此一致。我们还测量了交叉极化模式，其峰值水平小于-20 dB。
Polarization of the cosmic microwave background (CMB) has crucial information on the inflationary universe. To detect these signals, it is necessary to suppress far sidelobes of a telescope, which contaminate the CMB signals with strong foreground radiation, such as the Galactic plane. LiteBIRD is the only funded CMB observation satellite for the 2020s, and the low frequency telescope (LFT; 34-161 GHz) is one of its telescopes. We measured near-field antenna patterns of the LFT using its 1/4-scaled model and examined far sidelobes up to 60° from the peaks. To cover the 20° field of view of the LFT, we investigated the antenna patterns at the edges of the focal plane as well as at the center. The measurement frequencies were 140-220 GHz, which correspond to the lowest bands (35-55 GHz) of the full-scale LFT. The measurements were consistent with the simulated far-sidelobe patterns at least -50 dB level, and showed that far sidelobes for two orthogonal polarization directions are consistent with each other down to -40 dB level. We also measured the cross-polarization patterns, and their peak level was less than -20 dB.
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用于高精度宇宙微波背景旋光测量的二头肌望远镜的表征
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
Y. Takahashi;P. Ade;D. Barkats;D. Barkats;J. Battle;E. Bierman;J. Bock;J. Bock;H. Chiang;H. Chiang;C. Dowell;L. Duband;E. Hivon;W. Holzapfel;V. Hristov;W. Jones;W. Jones;B. Keating;J. Kovac;C. Kuo;A. Lange;E. Leitch;P. Mason;T. Matsumura;H. Nguyen;N. Ponthieu;C. Pryke;S. Richter;G. Rocha;G. Rocha;K. W. Yoon
通讯作者：
K. W. Yoon
PLANCK 射频鉴定模型的辐射方向图测量和预测
DOI：
10.1109/eumc.2008.4751564
发表时间：
2008
期刊：
2008 38th European Microwave Conference
影响因子：
--
作者：
G. Forma;D. Dubruel;J. Martí;M. Paquay;G. Crone;J. Tauber;M. Sandri;F. Villa;I. Ristorcelli
通讯作者：
I. Ristorcelli
LiteBIRD：一颗小型卫星，用于研究宇宙背景辐射探测中的 B 模式偏振和膨胀
DOI：
--
发表时间：
2012
期刊：
Other Conferences
影响因子：
--
作者：
M. Hazumi;J. Borrill;Y. Chinone;M. Dobbs;H. Fuke;A. Ghribi;M. Hasegawa;K. Hattori;M. Hattori;W. Holzapfel;Y. Inoue;K. Ishidoshiro;H. Ishino;K. Karatsu;N. Katayama;I. Kawano;A. Kibayashi;Y. Kibe;N. Kimura;K. Koga;E. Komatsu;Adrian T. Lee;H. Matsuhara;T. Matsumura;S. Mima;K. Mitsuda;H. Morii;S. Murayama;M. Nagai;R. Nagata;S. Nakamura;K. Natsume;H. Nishino;A. Noda;T. Noguchi;I. Ohta;C. Otani;P. Richards;S. Sakai;N. Sato;Y. Sato;Y. Sekimoto;A. Shimizu;K. Shinozaki;H. Sugita;A. Suzuki;T. Suzuki;O. Tajima;S. Takada;Y. Takagi;Y. Takei;T. Tomaru;Yoshinori Uzawa;Hiroki Watanabe;N. Yamasaki;M. Yoshida;T. Yoshida;K. Yotsumoto
通讯作者：
K. Yotsumoto
LiteBIRD跨龙望远镜的光学设计与物理光学分析
DOI：
10.1117/12.2312185
发表时间：
2018
期刊：
Proc.SPIE Int.Soc.Opt.Eng.
影响因子：
--
作者：
Dotani Tadayasu;Hasebe Takashi;Hazumi Masashi;Inatani Junji;Ishino Hirokazu;Kashima Shingo;Katayama Nobuhiko;Kimura Kimihiro;Matsumura Tomotake;Nagata Ryo;Sekimoto Yutaro;Sugai Hajime;Suzuki Aritoki;Utsunomiya Shin;Imada Hiroaki
通讯作者：
Imada Hiroaki
卫星通信天线先进技术：电气和机械设计
DOI：
10.1002/sat.4600110107
发表时间：
1990
期刊：
--
影响因子：
--
作者：
T. Kitsuregawa
通讯作者：
T. Kitsuregawa