DocumentCode :
913891
Title :
K-Band Traveling-Wave Maser Using Ruby
Author :
Yngvesson, K. Sigfrid ; Cheung, Albert C. ; Chui, Michael F. ; Cardiasmenos, Apostle G. ; Wang, Shih-Yuan ; Townes, Charles H.
Volume :
24
Issue :
11
fYear :
1976
fDate :
11/1/1976 12:00:00 AM
Firstpage :
711
Lastpage :
717
Abstract :
A K-band ruby traveling-wave maser (TWM) has been developed, which has provided a decrease in system noise temperature compared to other front ends presently used in radio telescopes at K-band by an order of magnitude. The maser uses a new type of photoetched slow-wave structure, integral with the ruby rod, especially suitable for millimeter-wave masers. It also employs a new type of built-in isolator configuration, which guarantees stable net gain of typically 30 dB over the tunable bandwidth, which is about 20 percent. Its phase stability, both short and long term, is excellent, making it highly suitable for use on an interferometer for radio astronomy.
Keywords :
Frequency; Isolators; K-band; Laboratories; Masers; Millimeter wave communication; Millimeter wave radar; Millimeter wave technology; Radio astronomy; Temperature;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.1976.1128950
Filename :
1128950
Link To Document :
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