Editing Antenna analyzer (section)

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[[Image:SWR analyzer measuring a dummy load.jpg|upright=1.36|thumb|An antenna analyzer measuring SWR and complex impedance of a dummy load. MFJ-269, [[MFJ Enterprises]] Inc.]]

An '''antenna analyzer''' or in British '''aerial analyser''' (also known as a '''noise bridge''', '''RX bridge''', '''SWR analyzer''', or '''RF analyzer''') is a device used for measuring the input impedance of [[antenna (radio)|antenna]] systems in [[radio]] [[electronics]] applications.

In radio communications systems, including [[amateur radio]], an antenna analyzer is a common tool used for fine tuning antenna and feedline performance, as well as troubleshooting them.<ref>{{cite book |editor1-first=Mark J. |editor1-last=Wilson |editor2-first=Dana G. |editor2-last=Reed |year=2007 |title=The ARRL Handbook for Radio Communications |quote=The comprehensive RF engineering reference |publisher=[[The American Radio Relay League]] |place=Newington, CT |isbn=978-0-87259-976-5 |postscript=,}} {{ISBN|978-0-87259-976-5}}</ref>

Antenna bridges have long been used in the broadcast industry to tune antennas. A bridge is available which measures [[complex Impedance|complex impedance]] while the transmitter is operating, practically a necessity when tuning multi-tower antenna systems.<ref name="Radiomag">{{cite web |last=Battison |first=John |title=Using the operating impedance bridge |website=Radio magazine |edition=online |quote=The Radio Technology Leader |publisher=New Bay Media |url=http://www.radiomagonline.com/misc/0082/using-the-operating-impedance-bridge/25382 |url-status=dead |access-date=20 July 2016 |archive-url=https://web.archive.org/web/20160718023956/http://www.radiomagonline.com/misc/0082/using-the-operating-impedance-bridge/25382 |archive-date=18 July 2016}}</ref> In more recent times the direct-reading network analyzers have become more common.