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Antenna consisting of two rod-shaped conductors
radio and telecommunications, a dipole antenna or doublet is one of the two simplest and most widely used types of antenna; the other is the monopole.[full
Dipole_antenna
Multi-element, directional antenna useable over a wide band of frequencies
common form of log-periodic antenna is the log-periodic dipole array or LPDA, The LPDA consists of a number of half-wave dipole driven elements of gradually
Log-periodic_antenna
Device that transmits and receives radio waves
Dipole and monopole antennas Array antennas Loop antennas Parabolic antenna Traveling wave antennas Log-periodic antenna Spiral antenna Horn antenna Adcock
Antenna_(radio)
Type of radio antenna
elements are most often metal rods (or discs) acting as half-wave dipoles. Yagi–Uda antennas consist of a single driven element connected to a radio transmitter
Yagi–Uda_antenna
Telecommunications performance metric
received by a lossless half-wave dipole antenna, in which case the units are written as "dBd". Since a lossless dipole antenna has a gain of 2.15 dBi, the
Gain_(antenna)
Definition of directional radio frequency power
It is the total power that would have to be radiated by a half-wave dipole antenna to give the same radiation intensity (signal strength, or power flux
Effective_radiated_power
Type of radio antenna consisting of a loop or coil
which makes them self-resonant at that frequency. Large loop antennas have a two-lobe dipole like radiation pattern at their first, full-wave resonance
Loop_antenna
Class of radio antenna
a dipole antenna which consists of two identical rod conductors, with the current from the transmitter applied between the two halves of the antenna. The
Monopole_antenna
Set of two dipole antennas
A turnstile antenna, or crossed-dipole antenna, is a radio antenna consisting of a set of two identical dipole antennas mounted at right angles to each
Turnstile_antenna
Radio antenna that sends signals in every direction
omnidirectional antennas are the whip antenna, "Rubber Ducky" antenna, ground plane antenna, vertically oriented dipole antenna, discone antenna, mast radiator
Omnidirectional_antenna
Antenna constructions for different applications
possible. Simple antennas There are three types of "simple antennas": dipoles, monopoles, and loops.[citation needed] The three simple antenna types are all
Antenna_types
Radio antenna that radiates extremely low frequency electromagnetic waves
ground dipole, also referred to as an earth dipole antenna, transmission line antenna, and in technical literature as a horizontal electric dipole (HED)
Ground_dipole
Omnidirectional circular bent dipole antenna
A halo antenna, or halo, is a center-fed 1 /2 wavelength dipole antenna, which has been bent into a circle, with a break directly opposite the feed
Halo_antenna
Set of multiple antennas which work together
in size. VHF collinear array of folded dipoles Sector antennas (white bars) on cell phone tower. Collinear dipole arrays, radiating a flat, fan-shaped beam
Antenna_array
Dipole antenna optimized for operation in the High Frequency bands
The G5RV antenna is a dipole with a symmetric resonant feeder line, which serves as impedance matcher for a 50 Ω coax cable to the transceiver. Louis
G5RV_antenna
Type of directional antenna
reflector antenna is a type of directional antenna used at VHF and UHF frequencies. It was invented by John D. Kraus in 1938. It consists of a dipole driven
Corner_reflector_antenna
Antenna used with a television to receive television programs
indoor antennas are the dipole ("rabbit ears"), which work best for VHF channels, and loop antennas, which work best for UHF. Outdoor antennas on the
Television_antenna
Type of antenna
paint. The feed antenna at the reflector's focus is typically a low-gain type, such as a half-wave dipole or (more often) a small horn antenna called a feed
Parabolic_antenna
Type of antenna used for various communication
similar to a dipole antenna. The shape and size of the slot, as well as the driving frequency, determine the radiation pattern. Slot antennas are usually
Slot_antenna
Type of antenna
An inverted vee antenna is a type of antenna similar to a horizontal dipole, but with the two sides bent down towards the ground, typically creating a
Inverted_vee_antenna
Type of vertical antenna
Wikimedia Commons has media related to HB9XBG-Antenna. The HB9XBG antenna is a vertical dipole antenna for short wave radio amateurs. It was developed
HB9XBG_Antenna
Radio antenna which has greater performance in specific alignments
omnidirectional antennas such as dipole antennas which radiate radio waves over a wide angle, or receive from a wide angle. The extent to which an antenna's angular
Directional_antenna
Rectangular two-element array antenna
than half) being the reflector. It is a two element Yagi-Uda antenna with folded dipole elements, and no director(s). Because of the folded ends, the
Moxon_antenna
Antenna for receiving power
element consists of a dipole antenna with a diode connected across the dipole elements. The diode rectifies the AC induced in the antenna by the microwaves
Rectenna
Type of electrical resistance from an antenna
half wave dipole as a driven element in antennas. The radiation resistance of a monopole antenna created by replacing one side of a dipole antenna by a perpendicular
Radiation_resistance
Radio signal transmission equipment
individual antenna design may use any of these three words, or others, but only address one of the issues. fan dipole also called a multi-dipole, is a common
Shortwave_broadband_antenna
Type of half-wave dipole antenna
A coaxial antenna (often known as a coaxial dipole) is a particular form of a half-wave dipole antenna, most often employed as a vertically polarized omnidirectional
Coaxial_antenna
Type of radio-wave propagation
requirements, various antennas (i.e. Sloper, T2FD, Dipole) can be used for NVIS communication, with horizontal dipoles or inverted V dipoles at about 1 /5 wavelength
Near vertical incidence skywave
Near_vertical_incidence_skywave
Shortwave antenna
antenna marketed by Bilal Co. for use as an amateur radio transmitting antenna for restricted spaces. It is physically short as compared to a dipole antenna
Isotron
Class of large multielement directional wire radio transmitting antennas
wire antennas, used in the short-wave radio bands. They constitute a type of reflective array antenna, consisting of multiple wire dipole antennas, suspended
Curtain_array
Antenna testing techniques
are valid for any type of antenna. It can be as well a dipole antenna, a loop antenna, a parabolic antenna, or an antenna array. From this formula, it
Antenna_measurement
German physicist (1857–1894)
(although the actual prize had expired uncollected in 1882). He used a dipole antenna consisting of two collinear one-meter wires with a spark gap between
Heinrich_Hertz
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 manner
Collinear_antenna_array
Type of radio antenna
larger than the antenna itself, the combination of whip and radio functions more as an asymmetrical dipole antenna than as a monopole antenna. The gain will
Whip_antenna
Type of electromagnetic radiation
antenna emits polarized radio waves, with the polarization determined by the direction of the metal antenna elements. For example, a dipole antenna consists
Radio_wave
Array of antennas creating a steerable beam
most commercial FM Radio and TV antenna towers use a collinear antenna array, which is a fixed phased array of dipole elements. In radar applications
Phased_array
General-purpose shortwave antenna
folded dipole ('T2FD, T2FD, or TTFD), or balanced-termination folded dipole (BTFD), also known as W3HH antenna, is a general-purpose shortwave antenna developed
T2FD_antenna
Topics referred to by the same term
(album), a 2011 album by White Town Monopole antenna, a radio antenna that replaces half of a dipole antenna with a ground plane at right-angles to the
Monopole
Circular antenna for radio direction finding
disposed antenna array (CDAA), sometimes referred to as a circularly disposed dipole array (CDDA) or a wullenweber, is a large circular antenna array used
Circularly disposed antenna array
Circularly_disposed_antenna_array
Cable or conductor connecting a radio transmitter to an antenna
walkie talkies and portable FM radios, the sleeve dipole antennas of wireless routers, and the PIFA antennas inside cellphones. In this case the feed system
Antenna_feed
Class of directive antennas
Consider two dipole antennas placed in a line end-to-end, or collinear. If the resulting array is pointed directly at the source signal, both dipoles will see
Reflective_array_antenna
Type of antenna
antennas are broadband dipole antennas, typically exhibiting a bandwidth of three octaves or more. A common subtype is the bowtie antenna, essentially a flattened
Biconical_antenna
Electrically conductive surface, usually connected to electrical ground
monopole antenna, the radiation pattern of the monopole plus the virtual image antenna make it appear as a two-element center-fed dipole antenna. So a monopole
Ground_plane
receiver towers included crossed dipole antennas at the 95 and 215 foot level for low-level targets, while antennas at the 45 and 95 foot levels were
Radar_in_World_War_II
Parameter characterizing an AC conductor
antenna is the thin element antenna in which the radiating elements are conductive wires or rods. These include monopole antennas and dipole antennas
Electrical_length
Telecommunication
Beverage antenna Dipole and monopole antennas Leaky wave antenna Rhombic antenna Shortwave broadband antenna C. H. Walter, Traveling Wave Antennas, McGraw-Hill
Traveling-wave_antenna
from a monopole antenna exists in half the space of a similar dipole antenna. Therefore, the maximum gain is twice that of a typical dipole, or an additional
Dual-band_blade_antenna
3-30 Hz range of the electromagnetic spectrum
submerged submarines. Those transmitters consist of huge grounded wire antennas (ground dipoles) that are 15–60 km (9–37 mi) long, and are driven by megawatts
Extremely_low_frequency
Directional variation in strength of radio waves
hypothetical isotropic antenna is used as a reference to calculate antenna gain. The simplest antennas, monopole and dipole antennas, consist of one or two
Radiation_pattern
television broadcasting antenna. Batwing antennas are a specialized type of crossed dipole antenna, a variant of the turnstile antenna. Two pairs of identical
Batwing_antenna
Type of radio transmitter
of the antenna, which was determined by its length; it acted as a half-wave dipole, which radiated waves roughly twice the length of the antenna (for example
Spark-gap_transmitter
Audio bug to spy on US embassy in Moscow
approximately 1967 to create its own covert listening devices based on a dipole antenna with a detector diode and a small microphone amplifier. The devices
The_Thing_(listening_device)
Topics referred to by the same term
Turnstiles (album), a 1976 studio album by Billy Joel Turnstile antenna, set of two dipole antennas Optical turnstile, physical security device TURNSTILE, a
Turnstile_(disambiguation)
US Navy research on communicating with submarines
(WTF), consisted of two 14-mile (23 km) transmission line antennas (called ground dipoles) in the shape of a cross, with the transmitter station at their
Project_Sanguine
Type of antenna
Milestones, or more easily found in. Dipole antenna Fractal antenna D. E. Isbell, "Log-periodic dipole arrays" IRE Trans. Antennas Propag., vol. AP-8, pp.260-267
Self-complementary_antenna
System used in radar to improve accuracy
scanning during World War II, notably the German Würzburg radar's rotating dipole antenna feed called Quirl. It was universal among gun laying radars by the end
Conical_scanning
Type of antenna
A panel antenna, in its simplest form, consists of a dipole placed ahead of a flat-panel reflector. Panel antennas are common at ultra high frequencies
Panel_antenna
Type of radio antenna
his antenna as "a pulled-open folded dipole". While the main point of Moore's patent was the two-turn single loop design, which is not the antenna termed
Quad_antenna
German WWII ground-based tracking radar
dipole antennas placed slightly on either side of the centreline of the parabolic reflector. The signal was switched rapidly between the two dipoles,
Würzburg_radar
Electromagnetic wave range of 30–300 MHz
antennas, while base stations usually use larger fiberglass whips or collinear arrays of vertical dipoles. For directional antennas, the Yagi antenna
Very_high_frequency
Type of radio antenna
vertical dipole with a thin upper element. In this configuration, at lower frequencies with a vertical element mounted above the disc, the antenna behaves
Discone_antenna
Topics referred to by the same term
Ocean Dipole Dipole antenna, a type of radio antenna Dipole magnet, a permanent magnet Dipole graph, a graph with two poles Dipole speaker, a loudspeaker
Dipole_(disambiguation)
{\displaystyle 120\pi ~\Omega } Since a half wave dipole is used, its gain over an isotropic antenna ( 2.15 dBi = 1.64 {\displaystyle {\mbox{2.15 dBi}}=1
Dipole field strength in free space
Dipole_field_strength_in_free_space
Telecommunications device
the antenna. The antenna feedpoint is usually high in the air (for example, a dipole antenna) or far away (for example, an end-fed random wire antenna).
Antenna_tuner
Radio telescope network located mainly in the Netherlands
antenna, as they are in most array antennas. Instead, the LOFAR dipole antennas (of two types) are distributed in stations, within which the antenna signals
Low-Frequency_Array
Two-conductor flat cable used to carry radio frequency signals
apart. This is well matched with the natural impedance of a folded dipole antenna, which is normally around 275 Ω. Twin lead generally has higher impedance
Twin-lead
Electrical device
cable from acting as an antenna and radiating power. This typically is needed when a balanced antenna (for instance, a dipole) is fed with coax; without
Balun
Topics referred to by the same term
object with an electromagnetic field which is not a magnetic monopole A dipole antenna in radio broadcasting Bipolar (disambiguation) This disambiguation page
Bipolarity
Failed NASA orbiter mission to the Moon (1958)
108.06 MHz through an electric dipole antenna for telemetry and doppler information at 300 mW and a magnetic dipole antenna for the television system at
Pioneer_1
Radar systems used to study the interaction between the Sun and the Earth
phased-array antenna fields. Each field consists of small antennas working together as one – specifically, between 5,000 and 10,000 crossed dipole antenna mounted
EISCAT
Surface on an antenna in electromagnetics
In electromagnetics and antenna theory, the aperture of an antenna is defined as "A surface, near or on an antenna, on which it is convenient to make assumptions
Aperture_(antenna)
Logarithmic unit expressing the ratio of physical quantities
unless noted otherwise. dBd dB(dipole) – the gain of an antenna compared with the gain of a half-wave dipole antenna. 0 dBd = 2.15 dBi dBiC dB(isotropic
Decibel
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
1919 – September 14, 1989) invented the Rabbit Ears television antenna (dipole antenna) in 1953 in Rego Park, Queens, New York. Marvin P. Middlemark revolutionized
Marvin_Middlemark
Measurement of the direction from which a received signal was transmitted
output if the signal was in front or back of the antenna. Later experimenters also used dipole antennas, which worked in the opposite sense, reaching maximum
Direction_finding
480i/p 720p, 1080i/p, and 2160 4k. crossed-dipole antenna A radio antenna with two identical dipole antennas mounted at right angles to each other and
Glossary of broadcasting terms
Glossary_of_broadcasting_terms
Ultra high frequency radio to transmit TV
dipole antenna about 2.75 m across. In comparison, the lowest channel in the UHF band, Channel 14, is on 470 MHz, a wavelength of 64 cm, or a dipole length
UHF_television_broadcasting
Flow of magnetic monopole charge
the driving source and feed line in the analysis of a finite diameter dipole antenna. The voltage source and feed line impedance are subsumed into the magnetic
Magnetic_current
Experimental space-based radio communication project
placing a ring of 480,000,000 copper dipole antennas in orbit to facilitate global radio communication. The dipoles collectively provided passive support
Project_West_Ford
Convention in engineering geometry
E-plane and H-plane are reference planes for linearly polarized waveguides, antennas and other microwave devices. In waveguide systems, as in the electric circuits
E-plane_and_H-plane
Vertical omnidirectional transmitting antenna
until an impedance match (minimum SWR) is obtained. Primarily a dipole, the J-pole antenna exhibits a mostly omnidirectional pattern in the horizontal (H)
J-pole_antenna
1958 failed U.S. space probe
Geophysical Year, through an electric dipole antenna for telemetry and doppler information and a magnetic dipole antenna for the television system. Ground
Pioneer_0
Radio aerial composed of directly-connected and passive elements
improvement in the antenna's gain. Adding a reflector to a dipole, to make a 2 element Yagi, increases the gain by about 5 dB over the dipole. Adding a director
Driven_and_parasitic_elements
Class of antennas
following antennas are usually employed: Dipole antennas, short antennas, parabolic and other reflector antennas, horn antennas, periscope antennas, helical
Metamaterial_antenna
a dipole antenna. To obtain enough gain, the antenna must be set at enough high place off the ground to avoid the effect of the ground. The antenna is
AWX_antenna
Alteration of the original shape of a signal
Amplifiers Antenna (radio) Broadcast transmitter/Transmitter station Cavity amplifier Differential gain Differential phase Diplexer Dipole antenna Dummy load
Distortion
Electromagnetic radiation with wavelengths from 1 m to 1 mm
and Bluetooth earphones. Antennas used include short whip antennas, rubber ducky antennas, sleeve dipoles, patch antennas, and increasingly the printed
Microwave
Topics referred to by the same term
to: Double figure-eight loop, a multi-loop knot Set-top tv antenna, a common dipole antenna V sign, a hand gesture behind another person's head giving
Bunny_ears_(disambiguation)
Specialty of electronic engineering
engineering involving the application of transmission line, waveguide, antenna, radar, and electromagnetic field principles to the design and application
Radio-frequency_engineering
Type of radio antenna
A "T"-antenna, "T"-aerial, or flat-top antenna is a monopole radio antenna consisting of one or more horizontal wires suspended between two supporting
T-antenna
Still image frame of moving picture
Amplifiers Antenna (radio) Broadcast transmitter/Transmitter station Cavity amplifier Differential gain Differential phase Diplexer Dipole antenna Dummy load
Film_frame
First airborne, ground scanning radar system WWII
from the Mark II only in the detail of the scanner antenna; IIA replaced the original dipole antenna at the scanner's focal point with a feed horn that
H2S_(radar)
Electromagnetic spectrum 300–3000 MHz
Omnidirectional UHF antennas used on mobile devices are usually short whips, sleeve dipoles, rubber ducky antennas or the planar inverted F antenna (PIFA) used
Ultra_high_frequency
Radio antenna on a vehicle for wireless keys
Reduced Size Meander Line-based 433 MHz Printed Dipole Antenna. KR 100871919B1, "Built-in antenna for wireless communication system (meander design)"
Automotive RKE receiver antenna
Automotive_RKE_receiver_antenna
line or ladder line). Based upon the same concept as a fan dipole antenna, a fan vertical antenna has multiple Radio frequency (RF) radiating elements each
W4BD_Antenna
Tall structures designed to support antennas
was also used at Criggion radio station. For ELF transmitters ground dipole antennas are used. Such structures require no tall masts. They consist of two
Radio_masts_and_towers
Signal processing device
a police department antenna on 460 MHz and a fire department antenna on 156 MHz. A diplexer at the top combines the two antenna signals to the single
Diplexer
Radio propagation model
Base-station antenna gain. Unit: decibel with respect to half wave dipole antenna (dBd) F M H = { h M 3 if, h M > 3 ( h M 3 ) 2 if, h M ≤ 3 {\displaystyle
Area-to-area_Lee_model
NASA probe to study solar wind, at L1 since 1995
plane antenna, defined as Ex, is 100 m (330 ft) tip-to-tip while the shorter, defined as Ey, is 15 m (49 ft) tip-to-tip. The spin axis dipole, defined
Wind_(spacecraft)
Characteristic of a radio antenna
In electromagnetics, the antenna factor (AF, units: m−1, reciprocal meter) is defined as the ratio of the electric field E (units: V/m or μV/m) to the
Antenna_factor
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DIPOLE ANTENNA
DIPOLE ANTENNA
DIPOLE ANTENNA
DIPOLE ANTENNA
DIPOLE ANTENNA
DIPOLE ANTENNA
DIPOLE ANTENNA
DIPOLE ANTENNA
DIPOLE ANTENNA
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