Loop antenna - Revision history

Karl Jones: /* External links */

2016-04-26T00:59:25Z

‎External links

Karl Jones: /* Amateur radio */

2016-02-19T21:16:03Z

‎Amateur radio

Karl Jones: Created page with "A '''loop antenna''' is a radio antenna consisting of a loop (or loops) of wire, tubing, or other electrical conductor with its ends connected to a balanced transmissi..."

2016-02-19T21:14:50Z

Created page with "A '''loop antenna''' is a radio antenna consisting of a loop (or loops) of wire, tubing, or other electrical conductor with its ends connected to a balanced transmissi..."

New page

A '''loop antenna''' is a [[radio antenna]] consisting of a loop (or loops) of wire, tubing, or other [[electrical conductor]] with its ends connected to a balanced transmission line (or a balun).

== Description ==

Within this physical description there are two very distinct antenna designs:

* The small loop (or magnetic loop) with a size much smaller than a wavelength
* The much larger [[resonant loop antenna]] with a circumference close to the intended wavelength of operation

== Small loops ==

Small loops have a poor efficiency and are mainly used as receiving antennas at low frequencies. Except for car radios, almost every AM broadcast receiver sold has such an antenna built inside it or directly attached to it.

Small loop antennas are also used for [[radio direction finding]].

== Amateur radio ==

In amateur radio, loop antennas are often used for low profile operating where larger antennas would be inconvenient, unsightly, or banned.

Loop antennas are relatively easy to build.

== See also ==

* [[Electrical conductor]]
* [[Electromagnetic induction]]
* [[Physics]]
* [[Radio]]
* [[Radio antenna]]

== External links ==

* [https://en.wikipedia.org/wiki/Loop_antenna Loop antenna] @ Wikipedia

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	* [https://en.wikipedia.org/wiki/Loop_antenna Loop antenna] @ Wikipedia		* [https://en.wikipedia.org/wiki/Loop_antenna Loop antenna] @ Wikipedia
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← Older revision		Revision as of 21:16, 19 February 2016
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	Small loop antennas are also used for [[radio direction finding]].		Small loop antennas are also used for [[radio direction finding]].
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		+	== Resonant loop antennas ==
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		+	Resonant loop antennas are relatively large, governed by the intended [[wavelength of operation]].
		+
		+	Thus they are typically used at higher frequencies, especially [[VHF]] and [[UHF]], where their size is manageable.
		+
		+	They can be viewed as a folded [[dipole]] deformed into a different shape, and have rather similar characteristics such as a high radiation efficiency.

	== Amateur radio ==		== Amateur radio ==