File:Screen dish antenna.jpg
Screen_dish_antenna.jpg (606 × 556 pixels, file size: 55 KB, MIME type: image/jpeg)
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DescriptionScreen dish antenna.jpg |
English: A microwave antenna linking a local computer with an MMDS wireless access point. MMDS (Multichannel Multipoind Distribution Service) is a technology for providing wireless internet service using C band (2 GHz) microwave links. This antenna is a parabolic antenna fed by a small vertical dipole under the little aluminum reflector on the boom It radiates a beam of vertically polarized microwaves aimed at another dish antenna on a nearby building. The wire grill reflector reflects radio waves as well as a solid metal dish, as long as the spacing between the wires is less than 1/10 wavelength and the wires are oriented parallel to the polarization of the waves, so wire mesh dishes are sometimes used to reduce weight and wind loading on the dish. |
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This file was derived from: Mmds dish1.jpg: |
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Cropped out sky to focus on antenna. The original can be viewed here: Mmds dish1.jpg: . Modifications made by Chetvorno.
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:07, 12 July 2013 | 606 × 556 (55 KB) | Chetvorno (talk | contribs) | Enhanced contrast to bring out detail | |
22:01, 12 July 2013 | 606 × 556 (52 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
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