File:Mmds_dish1.jpg
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Summary
DescriptionMmds dish1.jpg |
English: MMDS microwave antenna. 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 with a dipole feed that radiates a beam of vertically polarized microwaves. 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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Date | ||||
Source | Own work | |||
Author | Jim Jaworski | |||
Permission (Reusing this file) |
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Other versions | Derivative works of this file: Screen dish antenna.jpg |
Licensing
Public domainPublic domainfalsefalse |
I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
Items portrayed in this file
depicts
17 January 2005
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:38, 2 July 2006 | 2,304 × 1,536 (335 KB) | Jimj wpg~commonswiki | {{Information |Description= MMDS microwave antenna |Source= own work |Date= 2005-01-17 |Author= Jim Jaworski |Permission= {{PD-user|jimj_wpg}} |other_versions= }} |
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Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
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Camera manufacturer | EASTMAN KODAK COMPANY |
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Camera model | KODAK DX6490 ZOOM DIGITAL CAMERA |
Exposure time | 1/500 sec (0.002) |
F-number | f/3.7 |
Date and time of data generation | 16:29, 17 January 2005 |
Lens focal length | 63 mm |
Orientation | Normal |
Horizontal resolution | 230 dpi |
Vertical resolution | 230 dpi |
Y and C positioning | Centered |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 16:29, 17 January 2005 |
Shutter speed | 9 |
APEX aperture | 3.8 |
Maximum land aperture | 3.8 APEX (f/3.73) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Color space | sRGB |
Exposure index | 80 |
Sensing method | One-chip color area sensor |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 380 mm |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
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