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Omnidirectional antenna (639 bytes)
1: ...ectional antenna''' is an [[antenna (electronics)|antenna]] system which radiates maximum power uniformly i... 3: ...fectly omnidirectional antenna is the [[isotropic antenna]], 4: a theoretical construct derived from actual antenna 6: and used as a reference for specifying antenna [[gain]] 9: Practical antennas approach omnidirectionality by providing VHF omnidirectional range (11650 bytes) 17: ...ing - most VOR transmitters use a phased array of antennae such that the signal is "rotated" electronically... 19: ...rence between the two signals is the angle of the antenna at the instant the signal was sent, thereby encod... Antenna (636 bytes) 1: ..., '''[[Antenna (biology)|antenna]]''' (plural: '''antennae''') refers to the sensing organs of several [[ar... 2: ...'[[Antenna (electronics)|antenna]]''' (plural: '''antennas''') refers to the component designed to send and... 3: * [[ANT1|Antenna]], also known as ANT1, is a Greek-language terres... 4: *In [[astronomy]], '''[[Antennae (astronomy)|Antennae]]''' is the name of two colliding galaxies [[NGC... Helical antenna (1282 bytes) 1: ...ntenna]] with a circular [[polarization]]. These antennas are best suited for space communication, where t... 3: ...or vertical polarization, but clockwise polarized antennas suffer a severe [[gain]] loss when receiving cou... 5: ...ectional the antenna will be and its gain; longer antennas will be more sensitive in the direction in which... 8: *[[Telstar]] (article includes image of a helical antenna) 10: [[Category:Radio frequency antenna types]] Dipole antenna (2943 bytes) 1: ... is probably the most common and simplest-looking antenna. 3: ...the same, and their overall length determines the antenna's [[wavelength]]. The two elements are fed the s... 5: The most common dipole antenna is the kind used with [[television]]s called "rab... 7: ...ed to the proper length it is helpful if portable antennas are adjustable to allow for local conditions whe... 9: Dipoles are more efficient than whip antennas. Dipoles have a toroidal [[radiation pattern]] ... Whip antenna (1301 bytes) 1: ...ble, so that they don't break when struck. These antennas derive their name from the [[whip (implement)|wh... 3: ...rtened with a [[loading coil]] anywhere along the antenna. Whips are generally a fraction of their actual ... 5: Being vertically mounted causes the whip antenna to have vertical [[polarization]]. Whips are tho... 7: [[Category:Radio frequency antenna types]] Rhombic antenna (1573 bytes) 1: ...[[broadband]] directional [[antenna (electronics)|antenna]], mostly used in HF (high frequency, also called... 5: The rhombic antenna can radiate close to the horizon or at a higher a... 7: ...erable size, it is not very practical as the sole antenna of a radio station if operating conditions are ex... 9: ...ceptible to sharply localized fading than smaller antennas. 10: [[Category:Radio frequency antenna types]] T2FD Antenna (2358 bytes) 1: ...ral-purpose [[shortwave]] [[antenna (electronics)|antenna]] developed in the late [[1940s]] by the [[United... 5: While in many ways measurably inferior to antennas specifically designed for given frequency bands,... 16: *In order to make it roughly omnidirectional, it is strung sloping at an angle of 20 to 40 deg... 18: Such an antenna is usable for both local and medium-long distance... 20: For example, an antenna for the lower portion of shortwave (3 - 18 MHz) w... Directional antenna (433 bytes) 1: ...ectional antenna''' is an [[antenna (electronics)|antenna]] which transmits or receives maximum power in a ... 3: ... antennas can easily be [[omnidirectional antenna|omnidirectional]] in one plane. 4: [[Category:Radio frequency antenna types]] Yagi antenna (3075 bytes) 1: ...eal-tower-top.thumb2.jpg|thumb|right|250px|A yagi antenna]] 2: ...e dipole as directors. This arrangement gives the antenna directionality that a single dipole lacks. Yagis ... 4: ...uencies onto the active dipole. Thus the complete antenna achieves a distinct response bandwidth determined... 6: ...sides of the [[plane of symmetry]]. Many Yagi-Uda antennas (including the one pictured) are designed to ope... 8: ...r name for the antenna is, as above, the Yagi-Uda antenna (or array). Antenna tuner (443 bytes) 1: ...trically elongated antenna is never as good as an antenna with the precise physical length. 5: [[category: antenna terminology]] Horn Antenna (6273 bytes) 1: ...sey.jpeg|thumb|right|300px|Photograph of the Horn Antenna]] 2: ...Robert Wilson]]. In [[1965]] while using the Horn Antenna, Penzias and Wilson stumbled on the [[microwave b... 6: The Horn Antenna at Bell Telephone Laboratories in Holmdel, New Je... 8: ...a connecting line, is an important feature of the antenna. A radiometer for measuring the intensity of radi... 10: ...al force of 100 pounds is sufficient to start the antenna in motion. Antenna (astronomy) (313 bytes) 1: The '''Antennae''' is the name of two colliding [[galaxy|galaxie... 4: ...tronomy Picture of the Day, October 22, 1997: The Antennae Galxies] Beverage antenna (1766 bytes) 1: ...erage]], it is ''not'' a beverage can or beer can antenna. 3: ... easily rotated so installations may use multiple antennas to provide a choice of orientation. 5: ...termination to be used for one specific installed antenna. 10: *[http://www.qsl.net/aa3px/ AA3PX Antenna design page] 11: ...://www.angelfire.com/mb/amandx/bevant.html AMANDX antenna page] Antenna analyzer (1829 bytes) 1: An '''antenna analyzer''' (or noise bridge, or RX bridge) is a ... 3: ... receiver will reach a null (minimum). Tuning the antenna for the desired frequency then becomes a simple m... 5: ...l when the antenna is balanced. A badly mistuned antenna can produce enough reflected power to damage the ... Dish antenna (308 bytes) 1: ...ich a [[parabolic dish]] focuses a signal onto an antenna, located at the parabola's focal point. These dis... Antenna (album) (3681 bytes) 2: ...olspan="3" bgcolor="orange" style="color:black"|''Antenna'' 4: |align="center" colspan="3"|[[Image:ZZ Top - Antenna.jpg|225px|Album cover]] 35: |''[[Antenna (album)|Antenna]]''<br>([[1994]]) 38: '''''Antenna''''' is the eleventh studio [[album]] by [[Americ... 46: #"Antenna Head" (Beard, Gibbons, Hill) - 4:42 Biconical antenna (1766 bytes) 1: ...">[[Image:Biconiocal_antenna.png]]<br>''Biconical antenna''</div> 3: ...rections. Biconical antennas are broadband dipole antennas transceiving signals from 30 MHz to 300 MHz. 7: ...imple broadband wire approximation of a biconical antenna (commonly used for [[Ultra high frequency|UHF]] t... 10: *[[Antenna (electronics)|Antenna]] 16: ...ed.php?exampleID=41&thisProduct=XFDTD60 Biconical Antenna Example] Billboard antenna (562 bytes) 1: ...l elements of the array. ''Synonym'' '''broadside antenna'''. 4: [[Category:Radio frequency antenna types]] Cassegrain antenna (686 bytes) 1: ...ssegrain antenna''' is an [[antenna (electronics)|antenna]] in which the [[feed]] radiator is mounted at or... 5: ''Note 2:'' The Cassegrain antenna design is adapted from optical telescope technolo... 8: [[Category:Radio frequency antenna types]]
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