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5.8GHz Antenna Power Output Testing

Feb 1st 2019, 23:54


Joined: Nov 24th 2011, 00:08
Total Topics: 0
Total Posts: 0
I work at Sinclair Community College in Dayton, Ohio as an Aviation Technology Instructor for the Unmanned Aerial Systems program. We have a variety of small video transmitters that I would like to confirm the broadcast output power. I am trying to determine the best way to measure the 5.8GHz power output of video transmitters in the 25mw to 1 watt range. What would be a good way to approach this?

Thanks in advance,

Feb 3rd 2019, 09:47


Super Moderator

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
A power sensor and a calibrated attenuator is the best way of measuring average power. Keysight/Agilent/HP makes similar products. But, not only are they expensive, but they are quite fragile and blow up quite frequently. A spectrum analyzer and attenuators may be a more practical way of testing transmitters, as it allows you to view modulation as well as spurious signals. But, the absolute accuracy is poor.

These days transmitters are measured in peak, rather than average power. So an average power detector may not be what you want.

Zak W1VT
ARRL Senior Lab Engineer

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