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Post by m0wow on Feb 24, 2007 12:34:07 GMT
Hi, So what is the difference between an antenna and an aerial? Is it antenna's are vertical and aerials horizontal? or maybe antenna's are solid and aerials are wire? I have heard different things, so which is it; Anybody ??
73's de Den.
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Post by k9do on Feb 24, 2007 13:11:30 GMT
I think they mean so the same I looked it up and here is what I found..... The words antenna (plural: antennas[1]) and "aerial" are used interchangeably.The origin of the word antenna relative to wireless apparatus is attributed to Guglielmo Marconi. In 1895, while testing early radio apparatus in the Swiss Alps at Salvan, Switzerland in the Mont Blanc region, Marconi experimented with early wireless equipment. A 2.5 meter long pole, along which was carried a wire, was used as a radiating and receiving aerial element. In Italian a tent pole is known as l'antenna centrale, and the pole with a wire alongside it used as an aerial was simply called l'antenna. Until then wireless radiating transmitting and receiving elements were known simply as aerials or terminals. Marconi's use of the word antenna (Italian for pole) would become a popular term for what today is uniformly known as the antenna.[2] A hertz antenna is a set of terminals that does not require the presence of a ground for its operation. A loaded antenna is an active antenna having an elongated portion of appreciable electrical length and having additional inductance or capacitance directly in series or shunt with the elongated portion so as to modify the standing wave pattern existing along the portion or to change the effective electrical length of the portion. An antenna grounding structure is a structure for establishing a reference potential level for operating the active antenna. It can be any structure closely associated with (or acting as) the ground which is connected to the terminal of the signal receiver or source opposing the active antenna terminal, (i.e., the signal receiver or source is interposed between the active antenna and this structure). Or An antenna or aerial is an arrangement of aerial electrical conductors designed to transmit or receive radio waves which is a class of electromagnetic waves. In other words, antennas basically convert radio frequency electrical currents into electromagnetic waves and vice versa. Antennas are used in systems such as radio and television broadcasting, point-to-point radio communication, radar, and space exploration. Antennas usually work in air or outer space, but can also be operated under water or even through soil and rock at certain frequencies for short distances. Physically, an antenna is an arrangement of conductors that generate a radiating electromagnetic field in response to an applied alternating voltage and the associated alternating electric current, or can be placed in an electromagnetic field so that the field will induce an alternating current in the antenna and a voltage between its terminals. Some antenna devices (parabola, horn antenna) just adapt the free space to another type of antenna. Antennas were first used in 1888 by Heinrich Hertz (1857-1894) to prove the existence of electromagnetic waves predicted by the theory of James Clerk Maxwell. He even placed the emitter dipole in the focal point of a parabolic reflector. He published his work and installation drawings in Annalen der Physik und Chemie (vol. 36, 1889).
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Post by M0ZOE on Feb 25, 2007 12:16:50 GMT
Excellent find Renae Reading through, I think it seem's to concentrate on the word Antenna more than the word Aerial so I personally am still unsure if there really is a solid difference where people can say...'Yes an Aerial is this and an Antenna is that!' I think at the end of the day we may have to rely on our own personal prefereces as what to call our 'Radio Wave Transmit and Reception Devices' Look forward to hearing other opinions on this subject!
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Post by k9do on Feb 25, 2007 15:42:01 GMT
Excellent find Renae Reading through, I think it seem's to concentrate on the word Antenna more than the word Aerial so I personally am still unsure if there really is a solid difference where people can say...'Yes an Aerial is this and an Antenna is that!' I notice that older people say Aerial more ? ? maybe it is more older generation ? ? ?
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Post by M0ZOE on Feb 26, 2007 9:58:47 GMT
I am not sure why it is the older generation say Aerial more than Antenna, perhaps it is because it comes to mind quicker or even rolls off the tongue better...I dunno
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Post by kc9gld on Mar 1, 2007 0:15:41 GMT
I notice that older people say Aerial more ? ? maybe it is more o lder generation ? ? ?[/quote]
I would suspect this statement
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Post by M0ZOE on Mar 1, 2007 12:02:06 GMT
You are both probably correct We do things differently as we get older don't we
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Post by k9do on Mar 1, 2007 16:34:27 GMT
You are both probably correct We do things differently as we get older don't we Yes we do! as long as I don't end up like my Mother when I am old
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