Share
VIDEOS 1 TO 50
Ask Dave Episode 1: Antenna Analyzers
Ask Dave Episode 1: Antenna Analyzers
Published: 2015/06/12
Channel: David Casler
How To Use An Antenna Analyzer - Basics
How To Use An Antenna Analyzer - Basics
Published: 2015/03/26
Channel: K7AGE
MFJ-269c antenna analyzer
MFJ-269c antenna analyzer
Published: 2016/02/16
Channel: HamRadioConcepts
DIY No Frills AD9850/Arduino Antenna Analyzer
DIY No Frills AD9850/Arduino Antenna Analyzer
Published: 2015/08/03
Channel: jmhrvy1947
Antenna Analyzer Roundup
Antenna Analyzer Roundup
Published: 2012/01/06
Channel: ARRLHQ
How to use an antenna analyzer
How to use an antenna analyzer
Published: 2017/05/07
Channel: Ray Anderson
K6UDA Radio - SARK 110 the coolest little antenna analyzer in the world?
K6UDA Radio - SARK 110 the coolest little antenna analyzer in the world?
Published: 2016/04/30
Channel: K6UDA
AA30 Antenna Analyser
AA30 Antenna Analyser
Published: 2013/11/01
Channel: Paul Holland
The amazing FG-01 Antenna Analyzer!
The amazing FG-01 Antenna Analyzer!
Published: 2012/01/17
Channel: The Radio Hobbyist
Low-cost Antenna Analyzer 1hz~3ghz
Low-cost Antenna Analyzer 1hz~3ghz
Published: 2015/04/11
Channel: Terence Chan
Use an Antenna Analyzer WITH your Manual Antenna Tuner for maximum results - AF5DN
Use an Antenna Analyzer WITH your Manual Antenna Tuner for maximum results - AF5DN
Published: 2013/09/29
Channel: MeOnTech
YouKits FG 01 Antenna Analyzer Used to Test a 40m Whip Antenna
YouKits FG 01 Antenna Analyzer Used to Test a 40m Whip Antenna
Published: 2017/03/27
Channel: James Eagleson
Mini60 Antenna Analyzer
Mini60 Antenna Analyzer
Published: 2015/01/04
Channel: Anton Janovsky
Amateur Radio 2 Meter & 70 CM Testing With VHF/UHF Antenna Analyzer.wmv
Amateur Radio 2 Meter & 70 CM Testing With VHF/UHF Antenna Analyzer.wmv
Published: 2013/01/14
Channel: ElPaso TubeAmps
N1201SA Antenna Analyser Review
N1201SA Antenna Analyser Review
Published: 2017/01/18
Channel: Capt Science
MR100 Antenna Analyzer Review
MR100 Antenna Analyzer Review
Published: 2016/11/14
Channel: Radio Prepper
RigExpert AA-54 antenna analyzer demo
RigExpert AA-54 antenna analyzer demo
Published: 2013/01/23
Channel: VE2XIP
Rigexpert AA-230 Zoom antenna analyzer review
Rigexpert AA-230 Zoom antenna analyzer review
Published: 2015/11/24
Channel: HamRadioConcepts
How to use SURECOM Antenna Analyzer SA-250
How to use SURECOM Antenna Analyzer SA-250
Published: 2016/06/01
Channel: 409shop409
Antenna analyzer
Antenna analyzer
Published: 2015/08/01
Channel: TopoAndyGigio
SWR Antenna analyzer
SWR Antenna analyzer
Published: 2016/05/21
Channel: Neagu Daniel
Mini60 Antenna Analyzer Android  Quick Start Guide Ham Radio
Mini60 Antenna Analyzer Android Quick Start Guide Ham Radio
Published: 2017/04/25
Channel: OH8STN
Comet CAA500 Mark II Antenna Analyzer
Comet CAA500 Mark II Antenna Analyzer
Published: 2016/09/14
Channel: ARRLHQ
Rigexpert AA-1000 antenna analyzer review demo
Rigexpert AA-1000 antenna analyzer review demo
Published: 2015/03/11
Channel: HamRadioConcepts
Universal Radio presents the Comet CAA-500 Mk II Antenna Analyzer
Universal Radio presents the Comet CAA-500 Mk II Antenna Analyzer
Published: 2016/01/21
Channel: UniversalRadioInc
MFJ-226 Antenna Analyzer
MFJ-226 Antenna Analyzer
Published: 2016/09/14
Channel: ARRLHQ
Arduino Antenna Analyzer Review
Arduino Antenna Analyzer Review
Published: 2017/06/25
Channel: Michael Graves
MFJ 259C Antenna Analyzer– Back from MFJ Service Repair
MFJ 259C Antenna Analyzer– Back from MFJ Service Repair
Published: 2016/05/23
Channel: W5CYF / TinkerJohn
DIY No Frills Arduino Antenna Analyzer
DIY No Frills Arduino Antenna Analyzer
Published: 2015/11/07
Channel: Joel Caulkins
SARK-110 Vector Impedance Antenna Analyser Presented by ML&S Ltd
SARK-110 Vector Impedance Antenna Analyser Presented by ML&S Ltd
Published: 2014/01/05
Channel: ML&S
AW07A antenna analyzer
AW07A antenna analyzer
Published: 2014/11/28
Channel: AC9BX Eric
arduino antenna analyzer
arduino antenna analyzer
Published: 2016/10/06
Channel: Олег Борисов
You Kits FG-01 Antenna Analyser Part 1.
You Kits FG-01 Antenna Analyser Part 1.
Published: 2014/11/18
Channel: VK6CS
Using the SURECOM SA-160 Antenna Analyzer - Part 2
Using the SURECOM SA-160 Antenna Analyzer - Part 2
Published: 2016/10/18
Channel: ecolive
SARK-110 Antenna Analyzer Tour
SARK-110 Antenna Analyzer Tour
Published: 2013/12/08
Channel: Melchor Varela
Using an MFJ-259B Antenna Analyzer
Using an MFJ-259B Antenna Analyzer
Published: 2013/03/29
Channel: Stanley Coutant
TRRS #0050 - MFJ 266 Antenna Analyzer, Part 1
TRRS #0050 - MFJ 266 Antenna Analyzer, Part 1
Published: 2011/11/10
Channel: hamrad88
Basics of Using an MFJ Antenna Analyzer by W5LA
Basics of Using an MFJ Antenna Analyzer by W5LA
Published: 2014/08/14
Channel: Jim Ragsdale
Antenna Analyzer 1.0 Code presentation
Antenna Analyzer 1.0 Code presentation
Published: 2017/01/12
Channel: Donald Gover
SARK -100 Antenna Analyzer in action
SARK -100 Antenna Analyzer in action
Published: 2017/03/10
Channel: 2E0LYF
US$65 MR100 Antenna Analyzer Smith chart , WinPCC-SARK100 , MIINI60 , Zplots DE JI8SDQ
US$65 MR100 Antenna Analyzer Smith chart , WinPCC-SARK100 , MIINI60 , Zplots DE JI8SDQ
Published: 2015/06/15
Channel: 納豆最中ナゥピー
Cable and Antenna Analyzer Training Video | FieldFox Handheld Analyzers | Keysight
Cable and Antenna Analyzer Training Video | FieldFox Handheld Analyzers | Keysight
Published: 2014/08/02
Channel: Keysight Handhelds
MR100 Antenna Analyzer Calibration
MR100 Antenna Analyzer Calibration
Published: 2016/11/14
Channel: Radio Prepper
MFJ-1620T - Setting it up with the SURECOM SA-160 Antenna Analyzer - Part 1
MFJ-1620T - Setting it up with the SURECOM SA-160 Antenna Analyzer - Part 1
Published: 2016/10/18
Channel: ecolive
Gek antenna analyser
Gek antenna analyser
Published: 2016/08/06
Channel: Namachivayam Ganesan
HF vector antenna analyzer Lisic review and tutorial
HF vector antenna analyzer Lisic review and tutorial
Published: 2014/01/22
Channel: HamRadioConcepts
ANTENNA ANALYZER METROVNA LT IZ7LDG
ANTENNA ANALYZER METROVNA LT IZ7LDG
Published: 2014/05/06
Channel: Antonio Ferrulli
KVE-60C (MFJ-223) VNA antenna analyser quick review
KVE-60C (MFJ-223) VNA antenna analyser quick review
Published: 2014/07/01
Channel: tmarinos
Arduino Antenna analyzer
Arduino Antenna analyzer
Published: 2016/06/14
Channel: Neagu Daniel
Sark100 Antenna Analyzer
Sark100 Antenna Analyzer
Published: 2017/06/23
Channel: Tom Merrill
NEXT
GO TO RESULTS [51 .. 100]

WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
Jump to: navigation, search
An antenna analyzer measuring SWR and complex impedance of a dummy load. MFJ Enterprises Inc. MFJ-269.

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.

Types of analysers[edit]

Antenna bridge[edit]

A bridge circuit has two legs which are frequency-dependent complex-valued impedances. One leg is a circuit in the analyzer with calibrated components whose combined impedance can be read on a scale. The other leg is the unknown – either an antenna or a reactive component.

To measure impedance, the bridge is adjusted, so that the two legs have the same impedance. When the two impedances are the same, the bridge is balanced. Using this circuit it is possible to either measure the impedance of the antenna connected between ANT and GND, or it is possible to adjust an antenna, until it has the same impedance as the network on the left side of the diagram below. The bridge can be driven either with white noise or a simple carrier (connected to drive). In the case of white noise the amplitude of the exciting signal can be very low and a radio receiver used as the detector. In the case where a simple carrier is used then depending on the level either a diode detector or a receiver can be used. In both cases a null will indicate when the bridge is balanced.

A typical antenna bridge, the trimmer capacitor (C) is adjusted to make the bridge balance when the variable capacitor on the left is half meshed. Hence the bridge will be able to detect if an antenna is either a capacitive or inductive load.

Complex Voltage and Current meters[edit]

A second type of antenna analyzer measures the complex voltage across and current into the antenna. It then uses mathematical methods to calculate complex impedance and display it in either on a calibrated meter or a digital display. Professional instruments of this type are usually called network analyzers. This type of analyzer does not require the operator to adjust any R and X knobs as with the bridge type analyzer. Many of these instruments have the ability to sweep the frequency and thus plot the antenna characteristics over a wide range. Doing this with a manually operated bridge would be time consuming, requiring one to change the frequency and adjust the knobs at each frequency for a null.

High and low power methods[edit]

Many transmitters include an SWR meter in the output circuits which works by measuring the reflected wave from the antenna back to the transmitter, which is minimal when the antenna is matched. Reflected power from a badly tuned antenna can present an improper load at the transmitter which can damage it. A complex-impedance antenna analyzer typically requires only a few milliwatts of power be applied to the antenna. This avoids possible damage to the transmitter when the antenna is badly tuned.[1][2] In addition, if the power is very low, the analyzer can be used outside of the frequency bands licensed to the transmitter operator and thus get data on the antenna performance over a range of frequencies.

Uses[edit]

In radio communications systems, including amateur radio, an antenna analyzer is a common tool used for troubleshooting antennas and feedlines as well as fine tuning their performance.[3]

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.[4] In more recent times the direct reading network analyzers have become more common.

See also[edit]

References[edit]

  1. ^ Practical Radio Frequency Test and Measurement: A Technician's Handbook by Joseph J. Carr, P. 319. Published by Newnes, 1999. ISBN 0-7506-7161-0, ISBN 978-0-7506-7161-3
  2. ^ Secrets of RF Circuit Design by Joseph J. Carr, Chapter 17, Building and using the RF noise bridge. ISBN 0-07-137067-6
  3. ^ The ARRL Handbook for Radio Communications 2007: The Comprehensive RF Engineering Reference by Mark J. Wilson, Dana G. Reed. Published by American Radio Relay League, ISBN 0-87259-976-0, ISBN 978-0-87259-976-5
  4. ^ Battison, John. "Using the operating impedance bridge". Radio, The Radio Technology Leader. New Bay Media. Retrieved 20 July 2016. 

Further reading[edit]

Disclaimer

None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, Wikipedia, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.

All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.

The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.

Powered by YouTube
Wikipedia content is licensed under the GFDL and (CC) license