Impedance matching - Revision history

G4juv at 11:10, 30 January 2012

2012-01-30T11:10:55Z

← Older revision		Revision as of 04:10, 30 January 2012
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	This is done by an ATU. The simplest form of an ATU consists of a variable capacitor between TRTX and ground followed by a series variable inductor, which in turn is followed by a series variable capacitor which leads to the antenna (in case of an unbalanced feed line).		This is done by an ATU. The simplest form of an ATU consists of a variable capacitor between TRTX and ground followed by a series variable inductor, which in turn is followed by a series variable capacitor which leads to the antenna (in case of an unbalanced feed line).

	[[~~Image~~:ATU.~~png~~]]		[[File:ATU.jpg]]


	{{antennas}}		{{antennas}}

Carlb at 00:59, 9 April 2009

2009-04-09T00:59:15Z

← Older revision		Revision as of 17:59, 8 April 2009
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	[[Image:ATU.png]]		[[Image:ATU.png]]


			{{antennas}}

VK1WJ at 04:57, 4 April 2009

2009-04-04T04:57:26Z

← Older revision		Revision as of 21:57, 3 April 2009
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	* Couple an antenna with impedance other than 50 Ohm and non-zero reactance to a transceiver with 50 Ohm purely reactive impedance.		* Couple an antenna with impedance other than 50 Ohm and non-zero reactance to a transceiver with 50 Ohm purely reactive impedance.
	This is done by an ATU. The simplest form of an ATU consists of a variable capacitor between TRTX and ground followed by a series variable inductor, which in turn is followed by a series variable capacitor which leads to the antenna (in case of an unbalanced feed line).		This is done by an ATU. The simplest form of an ATU consists of a variable capacitor between TRTX and ground followed by a series variable inductor, which in turn is followed by a series variable capacitor which leads to the antenna (in case of an unbalanced feed line).

			[[Image:ATU.png]]

VK1WJ: New page: Impedance Matching is required to '''maximise energy transfer''' from an AC source to a device. Examples: * Transform 240V AC to 12V AC for a power supply. * Transform a 7 Kohm au...

2009-04-04T02:34:55Z

New page: Impedance Matching is required to '''maximise energy transfer''' from an AC source to a device. <u>Examples</u>: * Transform 240V AC to 12V AC for a power supply. * Transform a 7 Kohm au...

New page

Impedance Matching is required to '''maximise energy transfer''' from an AC source to a device.

<u>Examples</u>:
* Transform 240V AC to 12V AC for a power supply.
* Transform a 7 Kohm audio source (from an amplifier for instance) down to 16 Ohms for a headphone or loudspeaker.
- both of these can be done by using a transformer.

* Couple an antenna with impedance other than 50 Ohm and non-zero reactance to a transceiver with 50 Ohm purely reactive impedance.
This is done by an ATU. The simplest form of an ATU consists of a variable capacitor between TRTX and ground followed by a series variable inductor, which in turn is followed by a series variable capacitor which leads to the antenna (in case of an unbalanced feed line).