File:US Army Signal Corps AN-TRC-1, 5, 6, & 8 microwave relay station 1945.jpg

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Summary

Description
English: A US Army Signal Corps transportable microwave relay station from 1945 using AN/TRC-1, 5, 6, and 8 systems. Each pair of identical antennas is used for a link with another station up to 40 miles away, which can carry multiple telephone calls. Two antennas are required for bidirectional communication; one for transmitting and one for receiving. Microwave technology advanced during World War 2 due to the development of radar, and toward the end of the war the US Army began using microwave communication systems in the European theater. These military systems were some of the first practical microwave relay systems and presaged development of the great transcontinental commercial microwave relay networks in the 1950s. The systems shown here were:
  • AN/TRC-1, 70-100 MHz FM system carries 4 telephone circuits
  • AN/TRC-5, 230-250 MHz FM system carries 4 phone circuits
  • AN/TRC-6, 4.3-4.9 GHz TDM system carries 8 phone circuits
  • AN/TRC-8, 1.3-1.45 GHz TDM system carries 8 phone circuits



Alterations to image: cloned out text graphics overlaying upper right corner of image.
Date
Source Retrieved November 2, 2015 from "Directional Radio Relays" in Popular Science magazine, The Popular Science Publishing Co., New York, Vol. 148, No. 1, January 1946, p. 188 on Google Books
Author Credited to US Army Signal Corps

Licensing

Public domain
This file is a work of a U.S. Army soldier or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.

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January 1946

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Date/TimeThumbnailDimensionsUserComment
current04:27, 16 March 2022Thumbnail for version as of 04:27, 16 March 20222,044 × 1,246 (896 KB)MozillamanRetrieving higher quality capture from source.
08:09, 3 November 2015Thumbnail for version as of 08:09, 3 November 2015578 × 354 (48 KB)ChetvornoUser created page with UploadWizard
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