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Original file (446 × 1,717 pixels, file size: 227 KB, MIME type: image/jpeg)
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Summary
| Description |
English: VHF Collinear dipole array antenna used for a base station antenna for mobile two-way radio. The source says this is used on 136 -147 MHz. It consists of 4 folded dipole antennas mounted parallel on a mast, fed in phase. The antenna is used for base stations to communicate with portable or mobile radios in applications such as police, fire, ambulance, taxi or delivery services because it has a omnidirectional radiation pattern; it radiates equal signal strength in all azimuthal directions, with maximum power radiated in horizontal direction, perpendicular to the axis of the mast. Four antennas are used to increase the gain in horizontal directions; reducing the amount of power radiated into the sky or down toward the ground and wasted. |
| Date | |
| Source | Derived from 136 to 174 MHz base station antennas.jpg. Alterations to original image: cropped antenna image out of montage of four antennas. |
| Author |
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| Other versions | 136 to 174 MHz base station antennas.jpg contains this image in a mosaic with 3 other antennas. |
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:27, 1 June 2015 | | 446 × 1,717 (227 KB) | Chetvorno | User created page with UploadWizard |
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