File:Corner reflector TV antenna.png

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Corner_reflector_TV_antenna.png ‎(197 × 339 pixels, file size: 7 KB, MIME type: image/png)

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Summary

Description
English: A drawing of a corner reflector UHF television antenna from a 1954 advertisement in an electronics magazine. The corner reflector was a common antenna used for analog UHF TV reception. It consists of a "bow tie" dipole driven element made of a pair of sheet metal triangles suspended between two flat rectangular metal grill reflecting surfaces at an angle of 90°. The corner reflector's advantages were a high gain of 12-15 dBi, a large front-to-back ratio, and a wide bandwidth, much wider than the Yagi antenna.

Alterations to image: Cropped out the rest of the advertisement. Cloned in a little of the reflector screen in upper left corner where it was obscured by other picture elements. Added shading to bow-tie dipole to make its shape clearer.
Date
Source Retrieved August 7, 2014 from Radio and Television News magazine, Ziff-Davis Publishing Co., New York, Vol. 51, No. 6, June 1954, p. 33 on American Radio History site
Author Unknown authorUnknown author
Permission
(Reusing this file)		 This image is from an advertisement for Walsco Electronics Corp. without a copyright notice published in a 1954 magazine. In the United States, advertisements published in collective works (magazines and newspapers) are not covered by the copyright notice for the entire collective work. (See U.S. Copyright Office Circular 3, "Copyright Notice", page 3, "Contributions to Collective Works".) Since the advertisement was published before 1978 without a copyright notice, it falls into the public domain.

Licensing

This work is in the public domain in the United States because it was published in the United States between 1930 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.

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inception

June 1954

media type

image/png

checksum

7168aa4693f544ab0593c29bbcc1f3d358f22816

determination method or standard: SHA-1

data size

7,662 byte

height

339 pixel

width

197 pixel

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Date/TimeThumbnailDimensionsUserComment
current03:45, 7 August 2014Thumbnail for version as of 03:45, 7 August 2014197 × 339 (7 KB)wikimediacommons>ChetvornoUser created page with UploadWizard

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