Author Topic: RF Power Meter Modules  (Read 1728 times)

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Offline cjheath

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Re: RF Power Meter Modules
« Reply #1 on: April 12, 2019, 12:47:48 am »
It's almost certainly based on an AD8307 followed by an op-amp feeding a micro-controller ADC pin. Search for the data sheet of the AD8307 and you can learn all about it. Search for other modules that include the chip and you'll find further alternatives.
 

Offline kirill_ka

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Re: RF Power Meter Modules
« Reply #2 on: April 13, 2019, 07:55:59 am »
If you use word "accuracy", then you probably don't want those modules.
You can do some comparative measurements, not absolute. Even that would suck because of bad VSWR.
 

Offline sundanceTopic starter

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Re: RF Power Meter Modules
« Reply #3 on: April 13, 2019, 08:52:03 am »
That's kinda disappointing since those logarithmic detectors from Analog (like AD8318) claim to have a "High accuracy: ±1.0 dB over 55 dB range (f < 5.8 GHz)".
Maybe SV1AFD's project (https://www.sv1afn.com/ad8318.html) would be a better choice though having twice the price tag + you need a backend for a digital display.
 

Offline kirill_ka

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Re: RF Power Meter Modules
« Reply #4 on: April 13, 2019, 10:03:15 am »
That's kinda disappointing since those logarithmic detectors from Analog (like AD8318) claim to have a "High accuracy: ±1.0 dB over 55 dB range (f < 5.8 GHz)".
The point is that you need to calibrate it at the specific frequency to get this performance.
You can't do it without a "real" RF power meter (HP, Anritsu, R&S, Gigatronics, etc.).
 


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