File:Collinear folded dipole antenna array.jpg
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[edit]DescriptionCollinear folded dipole antenna array.jpg |
English: A collinear folded dipole antenna on a communication tower on Lake Mountain, Utah, USA. It consists of 4 vertical folded dipole antennas in a line, fed in phase. It is an omnidirectional antenna, radiating equal power in all horizontal directions. The advantage of using 4 antennas is that the horizontal gain is increased; more of the radio power is radiated in horizontal directions and less up into the sky and down toward the earth where it is wasted. Four collinear half wave dipoles have a gain of 6 dB over a single dipole's gain of 2.15 dBi or a total of 8.15 dBi. Collinear dipole arrays like this are often used as the base station antennas for dispatchers for radio-equipped mobile services such as police, fire, ambulance, taxi, and delivery services. Alterations to original image: cropped out other antennas in picture |
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Other versions | LocalservicesLakeMountain.jpg contains this image as part of a larger image of a communications tower. |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 06:23, 27 May 2015 | 264 × 784 (42 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | EASTMAN KODAK COMPANY |
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Camera model | KODAK EASYSHARE M763 DIGITAL CAMERA |
Exposure time | 1,309/1,000,000 sec (0.001309) |
F-number | f/5.5 |
ISO speed rating | 80 |
Date and time of data generation | 16:39, 10 May 2009 |
Lens focal length | 5.7 mm |
Orientation | Normal |
Horizontal resolution | 96 dpi |
Vertical resolution | 96 dpi |
Software used | GIMP 2.6.11 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 16:39, 10 May 2009 |
Meaning of each component |
|
APEX shutter speed | 9.577 |
APEX aperture | 4.91 |
APEX exposure bias | 0 |
Maximum land aperture | 2.97 APEX (f/2.8) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | Uncalibrated |
Exposure index | 80 |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 34 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Unique image ID | b67fdac2c3170411fc28a82f0b860820 |
Structured data
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10 May 2009
image/jpeg
4308e02e73b1c3e09f585ebe1fcc7420eec64de8
43,064 byte
784 pixel
264 pixel
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