File:Corner reflector antenna.jpg
From Wikimedia Commons, the free media repository
Jump to navigation
Jump to search
Corner_reflector_antenna.jpg (293 × 545 pixels, file size: 42 KB, MIME type: image/jpeg)
File information
Structured data
Captions
Summary[edit]
DescriptionCorner reflector antenna.jpg |
English: A corner reflector antenna, a common directional antenna used at UHF frequencies. It consists of a dipole driven element flanked by two screen reflectors, often at a 90° angle. |
Date | |
Source | Retrieved June 15, 2014 from J. S. Brown, "Evaluation of unidirectional antennas for 450-460 Mc" in Tele-Tech magazine, Caldwell-Clements Inc., Bristol, Connecticut, Vol. 11, No. 7, July 1952, p. 48 on American Radio History website |
Author | J. S. Brown |
Permission (Reusing this file) |
This 1952 issue of Tele-Tech magazine would have the copyright renewed in 1980. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. [1] Search of the Renewals for Periodicals for 1979, 1980, and 1981 show no renewal entries for Tele-Tech. Therefore the magazine's copyright was not renewed and it is in the public domain. |
Licensing[edit]
Public domainPublic domainfalsefalse |
This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. 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 (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
العربية ∙ Deutsch ∙ English ∙ español ∙ français ∙ galego ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ português ∙ português do Brasil ∙ русский ∙ sicilianu ∙ slovenščina ∙ українська ∙ 简体中文 ∙ 繁體中文 ∙ +/− |
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 17:51, 16 June 2014 | 293 × 545 (42 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org
Structured data
Items portrayed in this file
depicts
July 1952
image/jpeg
c3939e36ffffe64bacb8e08bf7a7b76f4fe2e785
43,297 byte
545 pixel
293 pixel
Hidden category: