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FM_broadcasting_antenna_Willans_Hill.jpg (381 × 590 pixels, file size: 165 KB, MIME type: image/jpeg)
Summary
DescriptionFM broadcasting antenna Willans Hill.jpg |
English: A broadcasting antenna for an FM radio station on a communications tower on Willans Hill, Wagga Wagga, New South Wales, Australia. These are called crossed dipole antennas, probably the most common type used for FM broadcasting. They consist of two V-shaped dipole elements facing each other; the one on the right driven by a coaxial cable, the one on the left a parasitic element. They radiate a circularly polarized (Cpol) radio signal. Four crossed-dipole "bays", fed in phase, are stacked vertically to increase the horizontal gain, so less of the signal power is radiated into the sky or down toward the ground and wasted. Alterations to original image: cropped out other parts of tower, increased brightness some. |
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Licensing
This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Australia license.
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- to share – to copy, distribute and transmit the work
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Items portrayed in this file
depicts
copyright status
copyrighted
copyright license
Creative Commons Attribution-Share Alike 2.5 Australia
inception
22 March 2011
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 07:21, 26 June 2015 | 381 × 590 (165 KB) | Chetvorno | User created page with UploadWizard |
File usage
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Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Camera manufacturer | BenQ Corporation |
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Camera model | DC C103X series |
Copyright holder | Copyright 2009 |
Exposure time | 1/490 sec (0.0020408163265306) |
F-number | f/5.5 |
ISO speed rating | 50 |
Date and time of data generation | 13:15, 22 March 2011 |
Lens focal length | 9.9 mm |
Orientation | Normal |
Horizontal resolution | 96 dpi |
Vertical resolution | 96 dpi |
Software used | GIMP 2.6.11 |
File change date and time | 03:24, 24 June 2015 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 13:15, 22 March 2011 |
Meaning of each component |
|
Image compression mode | 3 |
Shutter speed | 8.935 |
APEX aperture | 4.917 |
Exposure bias | 0 |
Maximum land aperture | 3.171 APEX (f/3) |
Metering mode | Multi-Spot |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 35 mm |
Scene capture type | 33 |
Sharpness | Normal |
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