Corrugated Silicon Platelet Feed Horn Array for CMB Polarimetry at 150 GHz

被引：14

作者：

Britton, Joseph W. ^{[1
,2
]}

Nibarger, John P. ^{[2
]}

Yoon, Ki Won ^{[2
]}

Beall, James A. ^{[2
]}

Becker, Dan ^{[2
]}

Cho, Hsiao-Mei ^{[2
]}

Hilton, Gene C. ^{[2
]}

Hubmayr, Johannes ^{[2
]}

Niemack, Michael D. ^{[2
]}

Irwin, Kent D. ^{[2
]}

机构：

[1] NIST, Div Time & Frequency, 325 Broadway, Boulder, CO 80305 USA

[2] NIST, Quantum Elect Metrol Div, Boulder, CO USA

来源：

MILLIMETER, SUBMILLIMETER, AND FAR-INFRARED DETECTORS AND INSTRUMENTATION FOR ASTRONOMY V | 2010年 / 7741卷

关键词：

observational cosmology; millimeter wavelength optics; MEMs;

D O I：

10.1117/12.857701

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Next generation cosmic microwave background (CMB) polarization anisotropy measurements will feature focal plane arrays with more than 600 millimeter-wave detectors. We make use of high-resolution photolithography and wafer-scale etch tools to build planar arrays of corrugated platelet feeds in silicon with highly symmetric beams, low cross-polarization and low side lobes. A compact Au-plated corrugated Si feed designed for 150 GHz operation exhibited performance equivalent to that of electroformed feeds: similar to -0.2 dB insertion loss, < -20 dB return loss from 120 GHz to 170 GHz, < -25 dB side lobes and < -23 dB cross-polarization. We are currently fabricating a 50 mm diameter array with 84 horns consisting of 33 Si platelets as a prototype for the SPTpol and ACTpol telescopes. Our fabrication facilities permit arrays up to 150 mm in diameter.

引用

页数：11

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