What is "antenna"

Antenna \An*ten"na\, n.; pl. Antenn[ae]. [L. antenna sail-yard; NL., a feeler, horn of an insect.]

1. (Zo["o]l.) A movable, articulated organ of sensation, attached to the heads of insects and Crustacea. There are two in the former, and usually four in the latter. They are used as organs of touch, and in some species of Crustacea the cavity of the ear is situated near the basal joint. In insects, they are popularly called horns, and also feelers. The term in also applied to similar organs on the heads of other arthropods and of annelids.

2. (Electronics) A metallic device, variously shaped, designed for the purpose of either transmitting or receiving radio waves, as for radio or television broadcasting, or for transmitting communication signals. Some types are: whip antenna, antenna tower, horn antenna, dish antenna, directional antenna and rabbit ears. See transmitter, receiver.

1640s, "feeler or horn of an insect," from Latin antenna "sail yard," the long yard that sticks up on some sails, which is of unknown origin, perhaps from PIE root *temp- "to stretch, extend." In the etymological sense, it is a loan-translation of Aristotle's Greek keraiai "horns" (of insects). Modern use in radio, etc., for "aerial wire" is from 1902. Adjectival forms are antennal (1834), antennary (1836), antennular (1858).

n. 1 A feeler organ on the head of an insect, crab, or other animal. 2 An apparatus to receive or transmit radio waves and convert respectively to or from an electrical signal. 3 The faculty of intuitive astuteness.

1. n. an electrical device that sends or receives radio or television signals [syn: aerial, transmitting aerial]

2. sensitivity similar to that of a receptor organ; "he had a special antenna for public relations" [syn: feeler]

3. one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste [syn: feeler]

4. [also: antennae (pl)]

Antenna (pl. antennas or antennae) may refer to:

Antennae (singular: antenna), sometimes referred to as "feelers," are paired appendages used for sensing in arthropods.

Antennae are connected to the first one or two segments of the arthropod head. They vary widely in form, but are always made of one or more jointed segments. While they are typically sensory organs, the exact nature of what they sense and how they sense it is not the same in all groups. Functions may variously include sensing touch, air motion, heat, vibration (sound), and especially smell or taste. Antennae are sometimes modified for other purposes, such as mating, brooding, swimming, and even anchoring the arthropod to a substrate.

The common ancestor of all arthropods likely had one pair of uniramous (unbranched) antenna-like structures, followed by one or more pairs of biramous (having two major branches) leg-like structures, as seen in some modern crustaceans and fossil trilobites. Except the chelicerates and proturans, which have none, all non-crustacean arthropods have a single pair of antennae.

Antenna is the eleventh studio album by the American blues rock band ZZ Top, released in 1994. It was the band's first album to be released on the RCA label. It was also the first time ZZ Top had a song with the album title in its name ("Antenna Head"). The opening track and first single from the album, "Pincushion", reached #1 on the Mainstream Rock Tracks chart in the US.

1. Redirect Antenna

Antenna is the third studio album and the first major label album by the American rock band Cave In. Released in 2003, it was Cave In's first and only album for RCA before they were dropped by RCA and re-signed with Hydra Head. Antenna marked a more commercial shift in Cave In's style which, while critically praised, was met with uneasiness from the band and distaste from longtime fans. In the midst of such polarization, the band began a return to its previous style, resulting in Perfect Pitch Black in 2005.

is the seventh studio album by Japanese rock band GO!GO!7188. The limited release first press also included a DVD featuring PV's for the single "Futashika Tashika" and a live performance, "Omata Kara no Live Eizou."

"Antenna" is a single by British Ghanaian singer-rapper Fuse ODG. The song was released in the United Kingdom as a digital download on 2 June 2013. The song peaked at number 7 on the UK Singles Chart and at number 9 in Scotland.

An antenna (plural antennae or antennas), or aerial, is an electrical device which converts electric power into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver. In transmission, a radio transmitter supplies an electric current oscillating at radio frequency (i.e. a high frequency alternating current (AC)) to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves (radio waves). In reception, an antenna intercepts some of the power of an electromagnetic wave in order to produce a tiny voltage at its terminals, that is applied to a receiver to be amplified.

Antennas are essential components of all equipment that uses radio. They are used in systems such as radio broadcasting, broadcast television, two-way radio, communications receivers, radar, cell phones, and satellite communications, as well as other devices such as garage door openers, wireless microphones, Bluetooth-enabled devices, wireless computer networks, baby monitors, and RFID tags on merchandise.

Typically an antenna consists of an arrangement of metallic conductors ( elements), electrically connected (often through a transmission line) to the receiver or transmitter. An oscillating current of electrons forced through the antenna by a transmitter will create an oscillating magnetic field around the antenna elements, while the charge of the electrons also creates an oscillating electric field along the elements. These time-varying fields radiate away from the antenna into space as a moving transverse electromagnetic field wave. Conversely, during reception, the oscillating electric and magnetic fields of an incoming radio wave exert force on the electrons in the antenna elements, causing them to move back and forth, creating oscillating currents in the antenna.

Antennas can be designed to transmit and receive radio waves in all horizontal directions equally ( omnidirectional antennas), or preferentially in a particular direction ( directional or high gain antennas). In the latter case, an antenna may also include additional elements or surfaces with no electrical connection to the transmitter or receiver, such as parasitic elements, parabolic reflectors or horns, which serve to direct the radio waves into a beam or other desired radiation pattern.

The first antennas were built in 1888 by German physicist Heinrich Hertz in his pioneering experiments to prove the existence of electromagnetic waves predicted by the theory of James Clerk Maxwell. Hertz placed dipole antennas at the focal point of parabolic reflectors for both transmitting and receiving. He published his work in Annalen der Physik und Chemie (vol. 36, 1889).

half-wave dipole antenna transmitting radio waves, showing the electric field lines. The antenna in the center is two vertical metal rods, with an alternating current applied at its center from a radio transmitter (not shown). The voltage charges the two sides of the antenna alternately positive (+) and negative (−). Loops of electric field (black lines) leave the antenna and travel away at the speed of light; these are the radio waves. half-wave dipole antenna receiving energy from a radio wave. The antenna consists of two metal rods connected to a receiver R. The electric field (E, green arrows) of the incoming wave pushes the electrons in the rods back and forth, charging the ends alternately positive (+) and negative (−). Since the length of the antenna is one half the wavelength of the wave, the oscillating field induces standing waves of voltage (V, represented by red band) and current in the rods. The oscillating currents (black arrows) flow down the transmission line and through the receiver (represented by the resistance R).

Antenna was an American indie rock band active from 1991 to 1994.

The group was put together in Bloomington, Indiana by John Strohm and Freda Love, who had previously played together in the group Blake Babies. After adding local musicians Jacob Smith and Vess Ruhtenberg to the lineup, they began recording some of the songs Strohm had written while a member of the Blake Babies. Their debut full-length followed on Mammoth Records not long afterwards.

After the departure of Ruhtenberg and Love, Patrick Spurgeon joined the group and an EP, Sleep, was released in 1992. The full-length Hideout followed in 1993, with Ed Ackerson filling in on second guitar for the departed Ruhtenberg. Love returned for the For Now EP, also issued in 1993, but it was the group's last before dissolving. Following the breakup, Love and Smith married, and Strohm formed Velo-Deluxe before moving on to a solo career later in the decade.

Antenna is a 1970 Dutch film directed by Adriaan Ditvoorst.

In this film was humorously parodied the hippie community. The story is about Aquarius, an eccentric lone artist who with a self-constructed smoothly over the Scheldt navigation. En route he comes on to a Catholic monastery in which conservative nuns hold sway. Within the monastery is a strict dictatorship, sex education does not exist and the freedom of the individual should succumb under the yoke of the faith.

The monastery also lives In the 18-year-old Antenna, which all her lifelong dreams of a life full of freedom outside the walls of the monastery. In Aquarius will see them however her rescue. Together with him she decides to flee, early morning sail them with their raft the River, on the way to a future of freedom and being together. While the raft in the fog disappears, there comes all of a sudden the next scene, we see a lonely hippie (which has of Jesus Christ) who lives on a farm. One day he draws as a kind of Prophet with his car in the country in order to proclaim the good news to everyone. He wants to love and bring peace to all and this he does by hand out free weed. The film ends in Amsterdam where the "drugsmessias" the Amsterdam rock temple Paradiso enter. Sit here between the hippie commune also Aquarius and Antenna.

Antenna gives a portrait of 1970s. The film is a typical work of Ditvoorst: freedom of the individual, the longing for a utopia which is not true, the lonely and misunderstood artist, the aversion against the State, bureaucracy and religious authorities, absurd characters etc. The film has little dialogue and is largely told through the images of cameraman Jan de Bont