NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
An 84 Pixel All-Silicon Corrugated Feedhorn for CMB Measurements
Published
Author(s)
John P. Nibarger, James A. Beall, Daniel T. Becker, Joseph W. Britton, Hsiao-Mei Cho, Anna E. Fox, Gene C. Hilton, Johannes Hubmayr, Dale Li, Kent D. Irwin, Jeffrey L. Van Lanen, Jeff McMahon, Ki Won Yoon
Abstract
Silicon platelet corrugated feedhorn for cosmic microwave background (CMB) measurements in the mm wave (130 to 170 GHz) have been developed for deployment for the polarization sensitive upgrade to both the Atacama Cosmology Telescope (ACTpol) and the South Pole Telescope (SPTpol). We present fabrication developments and the first results of a prototype monolithic feedhorn array consisting of 84 horns. Measurements show good beam quality across the needed bandwidth, return loss of -24 dB, an insertion loss of -0.4 dB, and cross polarization of
Nibarger, J.
, Beall, J.
, Becker, D.
, Britton, J.
, Cho, H.
, Fox, A.
, Hilton, G.
, Hubmayr, J.
, Li, D.
, Irwin, K.
, Van, J.
, McMahon, J.
and , K.
(2011),
An 84 Pixel All-Silicon Corrugated Feedhorn for CMB Measurements, Journal of Low Temperature Physics, [online], https://doi.org/10.1007/s10909-011-0428-z
(Accessed October 8, 2025)