![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/a/a1/SWR_analyzer_measuring_a_dummy_load.jpg/640px-SWR_analyzer_measuring_a_dummy_load.jpg&w=640&q=50)
Antenna analyzer
From Wikipedia, the free encyclopedia
For the San Francisco hackerspace/makerspace, see Noisebridge.
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 systems in radio electronics applications.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a1/SWR_analyzer_measuring_a_dummy_load.jpg/640px-SWR_analyzer_measuring_a_dummy_load.jpg)
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.[1]
Antenna bridges have long been used in the broadcast industry to tune antennas. A bridge is available which measures complex impedance while the transmitter is operating, practically a necessity when tuning multi-tower antenna systems.[2] In more recent times the direct-reading network analyzers have become more common.