Antennas (radio)

electrical device which converts electric power into radio waves, and vice versa

thumb|upright=2|Increase of amplitude as damping decreases and frequency approaches resonant frequency of a driven Damping ratio|damped [[simple harmonic oscillator.]]

quotient of the voltage phasor and the electric current phasor

property of waves that can oscillate with more than one orientation

type of cable

type of antenna

type of radio antenna

ability of a circuit to increase the power or amplitude of a signal

type of radio antenna

measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide

array of antennas creating a steerable beam

right|260px|thumbnail|Geodesic radomes at the Misawa Air Base|Misawa Security Operations Center, Misawa, Japan thumb|Spherical radome mounted atop the mainmast of a Type 45 destroyer thumb|A Boeing E-3 Sentry, showing its rotodome mounted above the fuselage A radome (a portmanteau of "radar" and "dome") is a structural, weatherproof enclosure that protects a radar antenna. The radome is constructed of material transparent to radio waves. Radomes protect the antenna from weather and conceal antenna electronic equipment from view. They also protect nearby personnel from being accidentally struck

type of antenna shaped like a horn and also called "horn"

definition of directional radio frequency power

main design element of Cassegrain reflecting telescope

theoretical point source which radiates electromagnetic or sound waves at the same intensity in all directions

set of multiple antennas which work together as a single antenna

antenna for receiving radio signal from or communicating with a satellite

telecommunications performance metric

thumb | right

set of marks at integer positions along an imaginary ruler such that no two pairs of marks are the same distance apart

electromagnetism

A type of antenna

type of radio antenna

formula used to calculate the total power radiated by a non relativistic point charge as it accelerates

antenna which radiates or receives greater power in specific directions

radio antenna that sends signals in every direction

thumb|300 Ohm (unit)|Ω twin-lead

multi-element, directional antenna

thumb|right|Diagram showing directivity: the highest power density of this antenna is in the direction of the red lobe

an antenna that uses a fractal, self-similar design to maximize the length, or increase the perimeter, of material that can receive or transmit electromagnetic radiation within a given total surface area or volume

type of radio antenna

type of radio propagation

Antenna

radio electronic device

antenna arrays with smart signal processing algorithms

how much a beam expands as it travels

methods to improve communications reliability

short electrical transmission line

device that manages radio functions in smartphones and other radio network interface devices

rectangular Microstrip Antenna is a radio antenna constructed from a single metal patch suspended over a ground plane

type of radio antenna

transmission line in radio antennas

type of radio antenna

type of parabolic antenna with a convex secondary reflector

General-purpose shortwave antenna

Physical statement of equivalence between two complementary antenna shapes

thumb|upright|5.5 GHz cantenna as a feed horn

system used in radar to improve accuracy

type of antenna used for various communication

rhombus-shaped 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 radio masts or buildings and insulated from them at the ends. A vertical wire is connected to the center of the horizontal wires and hangs down close to the ground, connected to the transmitter or receiver. The shape of the antenna resembles the letter "T", hence the name. The transmitter power is applied, or the receiver is connected, between the bottom of the vertical wire and a ground connection.

type of radio antenna

small horn antenna used to convey radio waves between a transmitter and/or receiver and a parabolic reflector

rectangular two-element array antenna often homebuilt by Amateur radio enthusiasts

type of radio antenna

Type of electrical resistance from an antenna

between near field and far field

type of RF antenna; shaped as a two-arm spiral; first described in 1956

American electrical engineer (1909–1982)