Tolerance Analysis of ALMA Band 10 Corrugated Horns and Optics

Author

Gonzalez, Alvaro ; Uzawa, Yoshinori

Author_Institution

Nat. Astron. Obs. of Japan, Tokyo, Japan

Volume

60

Issue

7

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

3137

Lastpage

3145

Abstract

Atacama Large Millimeter/sub-millimeter Array (ALMA) band 10 corrugated horns and optics (787-950 GHz) have been analyzed considering manufacturing and assembly tolerances. The results of thousands of Method-of-Moments and Physical-Optics simulations have been used to determine the impact of these tolerances on final electrical performances. Results on cross-polarization level and focus position, among others, are of special interest. This analysis has been compared with real measurements of ALMA band 10 production components. Results of measurements performed with a high number of corrugated horns match the statistical results fairly well. This study is important to assess the repeatability of results for different fabrications of the same component at THz frequencies.

Keywords

horn antennas; method of moments; polarisation; ALMA band 10 corrugated horns; ALMA band 10 production components; Atacama large millimeter/submillimeter array band; THz frequencies; assembly tolerances; cross-polarization level; frequency 787 GHz to 950 GHz; manufacturing tolerances; method of moments; physical optics simulation; tolerance analysis; Apertures; Assembly; Fabrication; Mirrors; Monte Carlo methods; Wires; Atacama Large Millimeter/sub-millimeter Array; Gaussian beams; submillimeter wave measurements; submillimeter wave technology;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2012.2196960

Filename

6193137