Open main menu
Home
Random
Recent changes
Special pages
Community portal
Preferences
About Wikipedia
Disclaimers
Incubator escapee wiki
Search
User menu
Talk
Dark mode
Contributions
Create account
Log in
Editing
Reflective array antenna
(section)
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
==References== <references /> {{FS1037C MS188}} {{multiple image | align = left | direction = horizontal | image1 = Reflective array, bow tie, grid, or panel UHF television antenna,.jpg | caption1 = A modern form of reflective array is the "bow tie" [[Ultrahigh frequency|UHF]] [[television antenna]]. This example has two dipole driven elements in front of a grill reflector. The "bow-tie" dipoles, consisting of two V-shaped elements, have a larger bandwidth than ordinary dipoles, allowing the antenna to cover the wide UHF television band. This example is installed for reception of vertically polarized TV transmissions. | width1 = 245 | image2 = Woodpecker array.jpg | caption2 = Enormous reflective array antenna of the [[Duga radar|Duga]] or "Steel Yard" [[Over the horizon radar|over-the-horizon]] (OTH) radar system, Chernobyl, Ukraine, part of the Soviet early-warning network. It transmits at frequencies between 7 and 19 MHz. The pairs of cylindrical cages at right are the [[half wave dipole]] driven elements. Behind them is a reflector screen of horizontal wires, just visible in center. | width2 = 230 | image3 = 06issoudun alliss Gange.JPG | caption3 = An [[ALLISS]] antenna, a modular type of [[curtain array]] used by international [[shortwave]] stations for broadcasting to distant areas by [[skywave]]. | width3 = 279 }} {{multiple image | align = left | direction = horizontal | header = | image1 = Reflective array VHF television antenna 1954.jpg | caption1 = VHF reflective array TV antenna from 1954. The driven elements are folded dipoles, the two long ones cover 54–88 MHz the 4 short ones 174–216 MHz. | width1 = 185 | image2 = Dipole array TV broadcast antenna.jpg | caption2 = "Panel array" VHF TV broadcasting antenna. This type is widely used for UHF today | width2 = 111 | image3 = Bowtie UHF TV antenna 1954.png | caption3 = "Bowtie" UHF TV antenna from 1954 | width3 = 112 | image5 = SCR-270 Radar Antenna2.jpg | caption5 = Closeup of SCR-20 reflective array from the 1950s | width5 = 270 | footer = }} {{Antenna Types}} [[Category:Radio frequency antenna types]] [[Category:Antennas (radio)]]
Edit summary
(Briefly describe your changes)
By publishing changes, you agree to the
Terms of Use
, and you irrevocably agree to release your contribution under the
CC BY-SA 4.0 License
and the
GFDL
. You agree that a hyperlink or URL is sufficient attribution under the Creative Commons license.
Cancel
Editing help
(opens in new window)