Quasi-Optical Attenuators for ALMA Band 10 Receiver

被引：0
|
作者：
Gonzalez, Alvaro [1 ]
Fujii, Yasunori [1 ]
Kaneko, Keiko [1 ]
Uzawa, Yoshinori [1 ]
机构：
[1] Natl Astron Observ Japan, ALMA Band Grp 10, 2-21-1 Osawa, Mitaka, Tokyo, Japan
来源：
ASIA-PACIFIC MICROWAVE CONFERENCE 2011 | 2011年
关键词：
Submillimeter wave technology; Quasi-optical waveguides; Gaussian beams; Submillimeter wave measurements; Atacama Large Millimeter/submillimeter Array;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Simple quasi-optical attenuators based on beam truncation have been designed, fabricated and tried on ALMA band 10 receivers (787 - 950 GHz) with optimal results. The design is based on physical-optics simulations considering effects of diffraction. The use of these attenuators allows flexibility in the design of the local oscillator (LO) quasi-optical injection scheme depending on the specific performance of components for each of the 73 ALMA band 10 receivers. In particular, they have proven very effective to keep system noise within the stringent ALMA requirements (230 K at 80% of 787-950 GHz band).
引用
收藏
页码：1977 / 1980
页数：4
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