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Receive Antennas (below 30MHz) - For all topics related to receive antennas used on HF, MW, LW, etc. For transmit antennas use the Amateur Radio Antennas forum.

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Old 03-08-2017, 5:41 AM
Join Date: Mar 2017
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Default measure receiving antenna voltage


how can we measure the received voltage from the antenna? can we measure it with multimeter? is it AC or DC voltage?

looking forward for help

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Old 03-08-2017, 7:20 AM
  Amateur Radio Operator
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Join Date: Dec 2015
Location: Woodlands, MB
Posts: 768

The signals on an antenna are RF signals which are AC. You'd need a service monitor or an oscilloscope with micro-volt scale.

You can get a ballpark figure if you have a decent communication receiver with an S meter. The S meter generally shows how many micro-volts are at the antenna input. I say generally because tests have shown that no two receiver brands are exactly the same. In some cases there can be big differences.

An S9 reading generally means there are 50 micro Volts. S-meter and signal strength
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Old 03-08-2017, 2:05 PM
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  Shack Photos
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Join Date: Dec 2008
Location: New Zealand
Posts: 2,680

You need my voltage vs power chart, and an HP 3586a.....

...but the hard part do you calibrate the antenna?

The "S" meter on a good radio is the obvious choice. There are some massive signals out there, but none you can measure with a digital voltmeter. A lot of shortwave broadcasts are S9+20dB but that's still only 500microvolts in 50ohms.
Cheers - Martin ZL2MC - Palmerston North
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antenna analysis

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