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Antenna system type
telecommunications, a collinear antenna array (sometimes spelled colinear antenna array) is an array of dipole or quarter-wave antennas mounted in such a
Collinear_antenna_array
Array of antennas creating a steerable beam
In antenna theory, a phased array usually means an electronically scanned array, a computer-controlled array of antennas which creates a beam of radio
Phased_array
Set of multiple antennas which work together
An antenna array (or array antenna) is a set of multiple connected antennas which work together as a single antenna, to transmit or receive radio waves
Antenna_array
Rectangular two-element array antenna
The Moxon antenna or Moxon rectangle is a simple and mechanically rugged two-element parasitic array, single-frequency antenna. It takes its name from
Moxon_antenna
Antenna consisting of two rod-shaped conductors
vertically oriented, in a so-called collinear antenna array (see graphic), that null direction becomes vertical and the array acquires an omnidirectional radiation
Dipole_antenna
Property of points all lying on a single line
a collinear (or co-linear) antenna array is an array of dipole antennas mounted in such a manner that the corresponding elements of each antenna are
Collinearity
Class of directive antennas
In telecommunications and radar, a reflective array antenna is a class of directive antennas in which multiple driven elements are mounted in front of
Reflective_array_antenna
Radio antenna that sends signals in every direction
using collinear dipole arrays. These consist of multiple half-wave dipoles mounted collinearly (in a line), fed in phase. The coaxial collinear (COCO)
Omnidirectional_antenna
Type of antenna used for various communication
and the antenna consists of slots in the waveguide; this is called a slotted waveguide antenna. Multiple slots act as a directive array antenna and can
Slot_antenna
Antenna constructions for different applications
fan-shaped beam. VHF collinear array of folded dipoles Four-bay collinear array of batwing television broadcasting antennas, Germany TV antenna for the UHF 470–890 MHz
Antenna_types
Dipole antenna optimized for operation in the High Frequency bands
this antenna in 1946. It is very popular in the United States. The antenna can be erected as horizontal dipole, as sloper, or an inverted-V antenna. With
G5RV_antenna
The sloper antenna is a slanted dipole antenna. While horizontal dipoles required two large support masts, this antenna type only needs one large mast
Sloper_antenna
Device that transmits and receives radio waves
monopole antennas Array antennas Loop antennas Parabolic antenna Traveling wave antennas Log-periodic antenna Spiral antenna Horn antenna Adcock antenna Sector
Antenna_(radio)
Class of large multielement directional wire radio transmitting antennas
Curtain arrays are a class of large multielement directional radio transmitting wire antennas, used in the short-wave radio bands. They constitute a type
Curtain_array
Non-commercial use of the radio spectrum
also affect transmissions: The United Kingdom measures at the point the antenna is connected to the signal feed cable, which means the radio system may
Amateur_radio
Vertical omnidirectional transmitting antenna
maximum benefits of collinear arrays, resulting in slightly less than the optimal 3 dB over a conventional J-pole or halfwave antenna. The approximate gain
J-pole_antenna
Type of radio antenna
Yagi–Uda antenna, or Yagi antenna, is a directional antenna consisting of two or more parallel resonant antenna elements in an end-fire array; these elements
Yagi–Uda_antenna
Type of broadcasting antenna
antenna is a broadcasting antenna used at VHF and UHF frequencies, named for its distinctive shape resembling a bat wing or bow tie. Stacked arrays of
Batwing_antenna
Type of radio-wave propagation
distinction arises solely from different desirable radiation patterns of the antennas (near vertical for NVIS, near horizontal for conventional long-range skywave
Near vertical incidence skywave
Near_vertical_incidence_skywave
Type of radio antenna
material for support and comprise a collinear array antenna. Such antennas are still called rubber ducky antennas even though they function quite differently
Rubber_ducky_antenna
Electromagnetic wave range of 30–300 MHz
make array antennas. Vertical collinear arrays of dipoles can be used to make high gain omnidirectional antennas, in which more of the antenna's power
Very_high_frequency
Shortwave antenna
Isotron is the trade name for a shortwave antenna marketed by Bilal Co. for use as an amateur radio transmitting antenna for restricted spaces. It is physically
Isotron
Measurement of the direction from which a received signal was transmitted
of all U-boats sunk during the war. Modern systems often used phased array antennas to allow rapid beamforming for highly accurate results, and are part
Direction_finding
Amateur radio frequency band
ideal for emergency communications. Repeaters typically use a collinear antenna array with vertical polarization, which allows the repeater to cover
2-meter_band
Communications equipment location
of antenna used for cellular base stations (vertical white rectangles in pictures), called a sector antenna, usually consists of a vertical collinear array
Cell_site
differential phase-shift keying – Coherer – Coilgun – Collinear antenna array – Collinear antenna array – Collins Radio – Colpitts oscillator – Combat-net
Index_of_electronics_articles
horizontal plane. Variants include shortened, loaded, and collinear designs. Printed antennas are widely used due to their low profile and ease of integration
Automotive_V2X_antennas
Electromagnetic spectrum 300–3000 MHz
omnidirectional UHF antennas can be made of collinear arrays of dipoles and are used for mobile base stations and cellular base station antennas. The short wavelengths
Ultra_high_frequency
Chinese lunar communications satellite
(14 ft) deployable parabolic antenna, the largest antenna used for a deep space exploration satellite. The large parabolic antenna provides 10 simultaneously
Queqiao-2
Meteorological instrument
use three individual antennas aimed in specific directions to steer the acoustic beam. Using three independent (i.e. non-collinear) axes is enough to retrieve
Sodar
Type of radio transmitter
circuit diagram. Hertz's transmitters consisted of a dipole antenna made of a pair of collinear metal rods of various lengths with a spark gap (S) between
Spark-gap_transmitter
Subfield of convex optimization
{\displaystyle \mathbf {R^{n}} } ; since the vectors are not required to be collinear, the value of this relaxed program can only be higher than the value of
Semidefinite_programming
Chinese lunar communications satellite
quasi-halo orbits–further complicates maintaining the pointing of antennas and solar arrays. Thus a halo orbit was chosen, at the cost of greater stationkeeping
Queqiao-1
Passive two-terminal electrical component that stores energy in its magnetic field
be turned with respect to the outer coil. When the two coils' axes are collinear, with the magnetic fields pointing in the same direction, the fields add
Inductor
Technology development overview
Physics. Robert Farquhar (1966). "Station-Keeping in the Vicinity of Collinear Libration Points with an Application to a Lunar Communications Problem"
Outline of artificial satellites
Outline_of_artificial_satellites
Group of genes
PMID 7913880. S2CID 39168197. Gaunt SJ (2018). "Hox cluster genes and collinearities throughout the tree of animal life". The International Journal of Developmental
Hox_gene
NASA satellite of the Explorer program
particles above about 0.5 MeV/nucleon. The main telescope consisted of five collinear elements (three solid state, one Caesium iodide (CsI), and one sapphire
Explorer_50
non-collinear members meet in an unloaded joint, both are zero-force members. If three members meet in an unloaded joint of which two are collinear, then
Glossary_of_engineering:_M–Z
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